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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Management;
namespace Duplicati.Library.Snapshots
{
public class HyperVGuest
{
public string Name { get; }
public string ID { get; }
public List<string> DataPaths { get; }
public HyperVGuest(string Name, string ID, List<string> DataPaths)
{
this.Name = Name;
this.ID = ID;
this.DataPaths = DataPaths;
}
}
public class HyperVUtility
{
private readonly ManagementScope _wmiScope;
private readonly string _vmIdField;
private readonly string _wmiHost = "localhost";
private readonly bool _wmiv2Namespace;
public bool IsHyperVInstalled { get; }
public HyperVUtility()
{
if (!Library.Utility.Utility.IsClientWindows)
{
IsHyperVInstalled = false;
Logging.Log.WriteMessage("Hyper-V Guests are supported only on Windows.", Logging.LogMessageType.Information);
return;
}
//Set the namespace depending off host OS
_wmiv2Namespace = Environment.OSVersion.Version.Major >= 6 && Environment.OSVersion.Version.Minor >= 2;
//Set the scope to use in WMI. V2 for Server 2012 or newer.
_wmiScope = _wmiv2Namespace
? new ManagementScope(string.Format("\\\\{0}\\root\\virtualization\\v2", _wmiHost))
: new ManagementScope(string.Format("\\\\{0}\\root\\virtualization", _wmiHost));
//Set the VM ID Selector Field for the WMI Query
_vmIdField = _wmiv2Namespace ? "VirtualSystemIdentifier" : "SystemName";
Logging.Log.WriteMessage(string.Format("Using WMI provider {0}", _wmiScope.Path), Logging.LogMessageType.Profiling);
try
{
var classesCount = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(
"SELECT * FROM meta_class")).Get().OfType<ManagementObject>().Count();
IsHyperVInstalled = classesCount > 0;
}
catch { IsHyperVInstalled = false; }
if (!IsHyperVInstalled)
Logging.Log.WriteMessage(string.Format("Cannot open WMI provider {0}. Hyper-V is probably not installed.", _wmiScope.Path), Logging.LogMessageType.Information);
}
/// <summary>
/// We query the Hyper-V for all requested Virtual Machines
/// </summary>
/// <returns>List of Hyper-V Machines</returns>
public List<HyperVGuest> GetHyperVGuests()
{
var hyperVMachines = new List<HyperVGuest>();
if(!IsHyperVInstalled)
return hyperVMachines;
var wmiQuery = _wmiv2Namespace
? "SELECT * FROM Msvm_VirtualSystemSettingData WHERE VirtualSystemType = 'Microsoft:Hyper-V:System:Realized'"
: "SELECT * FROM Msvm_VirtualSystemSettingData WHERE SettingType = 3";
using (var moCollection = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(wmiQuery)).Get())
foreach (var mObject in moCollection)
{
var paths = GetAllVmVhdPaths((string)mObject[_vmIdField]);
paths.AddRange(GetAllVmConfigPaths((string)mObject[_vmIdField]));
hyperVMachines.Add(new HyperVGuest((string)mObject["ElementName"], (string)mObject[_vmIdField], paths));
}
return hyperVMachines;
}
/// <summary>
/// For given Hyper-V guest it enumerate all associated configuration files
/// </summary>
/// <param name="query"></param>
/// <returns>A collection of configuration paths</returns>
private List<string> GetAllVmConfigPaths(string vmID)
{
var result = new List<string>();
string path;
var wmiQuery = _wmiv2Namespace
? string.Format("select * from Msvm_VirtualSystemSettingData where {0}='{1}'", _vmIdField, vmID)
: string.Format("select * from Msvm_VirtualSystemGlobalSettingData where {0}='{1}'", _vmIdField, vmID);
using (var mObject1 = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(wmiQuery)).Get().Cast<ManagementObject>().First())
if (_wmiv2Namespace)
{
path = Path.Combine((string)mObject1["ConfigurationDataRoot"], (string)mObject1["ConfigurationFile"]);
if (File.Exists(path))
result.Add(path);
using (var snaps = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(string.Format(
"SELECT * FROM Msvm_VirtualSystemSettingData where VirtualSystemType='Microsoft:Hyper-V:Snapshot:Realized' and {0}='{1}'",
_vmIdField, vmID))).Get())
{
foreach (var snap in snaps)
{
path = Path.Combine((string)snap["ConfigurationDataRoot"], (string)snap["ConfigurationFile"]);
if (File.Exists(path))
result.Add(path);
path = Utility.Utility.AppendDirSeparator(Path.Combine((string)snap["ConfigurationDataRoot"], (string)snap["SuspendDataRoot"]));
if (Directory.Exists(path))
result.Add(path);
}
}
}
else
{
path = Path.Combine((string)mObject1["ExternalDataRoot"], "Virtual Machines", vmID + ".xml");
if (File.Exists(path))
result.Add(path);
path = Utility.Utility.AppendDirSeparator(Path.Combine((string)mObject1["ExternalDataRoot"], "Virtual Machines", vmID));
if (Directory.Exists(path))
result.Add(path);
var snapsIDs = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(string.Format(
"SELECT * FROM Msvm_VirtualSystemSettingData where SettingType=5 and {0}='{1}'",
_vmIdField, vmID))).Get().OfType<ManagementObject>().Select(o => (string)o.GetPropertyValue("InstanceID")).ToList();
foreach (var snapID in snapsIDs)
{
path = Path.Combine((string)mObject1["SnapshotDataRoot"], "Snapshots", snapID.Replace("Microsoft:", "") + ".xml");
if (File.Exists(path))
result.Add(path);
path = Utility.Utility.AppendDirSeparator(Path.Combine((string)mObject1["SnapshotDataRoot"], "Snapshots", snapID.Replace("Microsoft:", "")));
if (Directory.Exists(path))
result.Add(path);
}
}
return result.Distinct(Utility.Utility.ClientFilenameStringComparer).ToList();
}
/// <summary>
/// For given Hyper-V guest it enumerate all associated VHD files
/// </summary>
/// <param name="query"></param>
/// <returns>A collection of VHD paths</returns>
private List<string> GetAllVmVhdPaths(string vmID)
{
var result = new List<string>();
using (var vm = new ManagementObjectSearcher(_wmiScope, new ObjectQuery(string.Format("select * from Msvm_ComputerSystem where Name = '{0}'", vmID)))
.Get().OfType<ManagementObject>().First())
{
foreach (var sysSettings in vm.GetRelated("MsVM_VirtualSystemSettingData"))
using (var systemObjCollection = ((ManagementObject)sysSettings).GetRelated(_wmiv2Namespace ? "MsVM_StorageAllocationSettingData" : "MsVM_ResourceAllocationSettingData"))
{
List<string> tempvhd;
if (_wmiv2Namespace)
tempvhd = (from ManagementBaseObject systemBaseObj in systemObjCollection
where ((UInt16)systemBaseObj["ResourceType"] == 31
&& (string)systemBaseObj["ResourceSubType"] == "Microsoft:Hyper-V:Virtual Hard Disk")
select ((string[])systemBaseObj["HostResource"])[0]).ToList();
else
tempvhd = (from ManagementBaseObject systemBaseObj in systemObjCollection
where ((UInt16)systemBaseObj["ResourceType"] == 21
&& (string)systemBaseObj["ResourceSubType"] == "Microsoft Virtual Hard Disk")
select ((string[])systemBaseObj["Connection"])[0]).ToList();
foreach (var vhd in tempvhd)
result.Add(vhd);
}
}
using (var imgMan = new ManagementObjectSearcher(_wmiScope, new ObjectQuery("select * from MsVM_ImageManagementService")).Get().OfType<ManagementObject>().First())
{
var ParentPaths = new List<string>();
var inParams = imgMan.GetMethodParameters(_wmiv2Namespace ? "GetVirtualHardDiskSettingData" : "GetVirtualHardDiskInfo");
foreach (var vhdPath in result)
{
inParams["Path"] = vhdPath;
using (var outParams = imgMan.InvokeMethod(_wmiv2Namespace ? "GetVirtualHardDiskSettingData" : "GetVirtualHardDiskInfo", inParams, null))
{
if (outParams != null)
{
var doc = new System.Xml.XmlDocument();
doc.LoadXml((string)outParams[_wmiv2Namespace ? "SettingData" : "Info"]);
var node = doc.SelectSingleNode("//PROPERTY[@NAME = 'ParentPath']/VALUE/child::text()");
if (node != null && File.Exists(node.Value))
ParentPaths.Add(node.Value);
}
}
}
result.AddRange(ParentPaths);
}
return result.Distinct(Utility.Utility.ClientFilenameStringComparer).ToList();
}
}
}
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