Merge pull request #22506 from l0rd/win-install-hyperv

Add Hyper-V option in windows installer

.cirrus.yml

@@ -483,6 +483,11 @@ swagger_task:
 
 win_installer_task:
     name: "Verify Win Installer Build"
+    matrix:
+      - env:
+            CONTAINERS_MACHINE_PROVIDER: 'wsl'
+      - env:
+            CONTAINERS_MACHINE_PROVIDER: 'hyperv'
     alias: win_installer
     only_if:  # RHEL never releases podman windows installer binary
       $CIRRUS_TAG == '' &&

.gitignore

@@ -44,3 +44,13 @@ result
 # Necessary to prevent hack/tree-status.sh false-positive
 /*runner_stats.log
 .generate-bindings
+contrib/win-installer/artifacts/
+contrib/win-installer/docs/
+contrib/win-installer/fetch/
+contrib/win-installer/podman.msi
+contrib/win-installer/podman-*setup.exe
+contrib/win-installer/engine.exe
+contrib/win-installer/shasums
+contrib/win-installer/pages.wxs
+contrib/win-installer/*.wixobj
+contrib/win-installer/*.wixpdb

contrib/cirrus/win-installer-main.ps1

@@ -2,22 +2,59 @@
 
 . $PSScriptRoot\win-lib.ps1
 
-Set-Location "$ENV:CIRRUS_WORKING_DIR\repo\contrib\win-installer"
+if ($Env:CI -eq "true") {
+    $WIN_INST_FOLDER = "$ENV:CIRRUS_WORKING_DIR\repo\contrib\win-installer"
+    $RELEASE_DIR = "$ENV:CIRRUS_WORKING_DIR\repo"
+} else {
+    $WIN_INST_FOLDER = "$PSScriptRoot\..\win-installer"
+    $ENV:WIN_INST_VER = "9.9.9"
+    $RELEASE_DIR = "$PSScriptRoot\..\.."
+    $ENV:CONTAINERS_MACHINE_PROVIDER = "wsl"
+}
+
+$ConfFilePath = "$env:ProgramData\containers\containers.conf.d\99-podman-machine-provider.conf"
+$WindowsPathsToTest = @("C:\Program Files\RedHat\Podman\podman.exe",
+                  "C:\Program Files\RedHat\Podman\win-sshproxy.exe",
+                  "$ConfFilePath",
+                  "HKLM:\SOFTWARE\Red Hat\Podman")
+
+Set-Location $WIN_INST_FOLDER
 
 # Build Installer
 # Note: consumes podman-remote-release-windows_amd64.zip from repo.tbz2
-Run-Command ".\build.ps1 $Env:WIN_INST_VER dev `"$ENV:CIRRUS_WORKING_DIR\repo`""
+Run-Command ".\build.ps1 $Env:WIN_INST_VER dev `"$RELEASE_DIR`""
 
-# Run the installer silently and WSL install option disabled (prevent reboots, wsl requirements)
+# Run the installer silently and WSL/HyperV install options disabled (prevent reboots)
 # We need AllowOldWin=1 for server 2019 (cirrus image), can be dropped after server 2022
-$ret = Start-Process -Wait -PassThru ".\podman-${ENV:WIN_INST_VER}-dev-setup.exe" -ArgumentList "/install /quiet WSLCheckbox=0 AllowOldWin=1 /log inst.log"
+$ret = Start-Process -Wait -PassThru ".\podman-${ENV:WIN_INST_VER}-dev-setup.exe" -ArgumentList "/install /quiet MachineProvider=$ENV:CONTAINERS_MACHINE_PROVIDER WSLCheckbox=0 HyperVCheckbox=0 AllowOldWin=1 /log inst.log"
 if ($ret.ExitCode -ne 0) {
     Write-Host "Install failed, dumping log"
     Get-Content inst.log
     throw "Exit code is $($ret.ExitCode)"
 }
-if (! ((Test-Path -Path "C:\Program Files\RedHat\Podman\podman.exe") -and `
+$WindowsPathsToTest | ForEach-Object {
-       (Test-Path -Path "C:\Program Files\RedHat\Podman\win-sshproxy.exe"))) {
+    if (! (Test-Path -Path $_) ) {
-    throw "Expected podman.exe and win-sshproxy.exe, one or both not present after install"
+        throw "Expected $_ but it's not present after uninstall"
+    }
 }
+$machineProvider = Get-Content $ConfFilePath | Select-Object -Skip 1 | ConvertFrom-StringData | ForEach-Object { $_.provider }
+if ( $machineProvider -ne "`"$ENV:CONTAINERS_MACHINE_PROVIDER`"" ) {
+    throw "Expected `"$ENV:CONTAINERS_MACHINE_PROVIDER`" as default machine provider but got $machineProvider"
+}
+
 Write-Host "Installer verification successful!"
+
+# Run the uninstaller silently to verify that it cleans up properly
+$ret = Start-Process -Wait -PassThru ".\podman-${ENV:WIN_INST_VER}-dev-setup.exe" -ArgumentList "/uninstall /quiet /log uninst.log"
+if ($ret.ExitCode -ne 0) {
+    Write-Host "Uninstall failed, dumping log"
+    Get-Content uninst.log
+    throw "Exit code is $($ret.ExitCode)"
+}
+$WindowsPathsToTest | ForEach-Object {
+    if ( Test-Path -Path $_ ) {
+        throw "Path $_ is still present after uninstall"
+    }
+}
+
+Write-Host "Uninstaller verification successful!"

contrib/win-installer/burn.wxs

@@ -17,10 +17,13 @@
     </BootstrapperApplicationRef>
     <Variable Name='InstallFolder' Type='string' Value='[ProgramFiles64Folder]RedHat\Podman' bal:Overridable="yes"/>
     <Variable Name="VERSION" Value="$(var.VERSION)"/>
+    <Variable Name="MachineProvider" Type="string" Value="wsl" bal:Overridable="yes"/>
     <Variable Name="WSLCheckbox" Type="numeric" Value="1" bal:Overridable="yes"/>
+    <Variable Name="HyperVCheckbox" Type="numeric" Value="0" bal:Overridable="yes"/>
     <Variable Name="AllowOldWin" Type="numeric" Value="0" bal:Overridable="yes"/>
     <Variable Name="LaunchTarget" Value="explorer.exe"/>
     <Variable Name="LaunchArguments" Value="&quot;[InstallFolder]\podman-for-windows.html&quot;"/>
+    <Variable Name="SkipConfigFileCreation" Value="0"/>
 
     <util:RegistrySearch Id="PreviousVersionSearch" Variable="PreviousVersion"  Result="value" Root="HKLM"  Key="SOFTWARE\[WixBundleManufacturer]\Updates\[WixBundleName]" Value="PackageVersion"/>
     <util:RegistrySearch Id="PreviousInstallFolderSearch" Root="HKLM" Key="SOFTWARE\[WixBundleManufacturer]\[WixBundleName]" Value="InstallDir" Variable="PreviousInstallFolder" Win64="yes"/>
@@ -35,9 +38,12 @@
     <Chain>
       <MsiPackage Id="Setup" SourceFile="podman.msi" Vital="yes">
         <MsiProperty Name="INSTALLDIR" Value="[InstallFolder]" />
+        <MsiProperty Name="MACHINE_PROVIDER" Value="[MachineProvider]"/>
         <MsiProperty Name="WITH_WSL" Value="[WSLCheckbox]"/>
+        <MsiProperty Name="WITH_HYPERV" Value="[HyperVCheckbox]"/>
+        <MsiProperty Name="SKIP_CONFIG_FILE_CREATION" Value="[SkipConfigFileCreation]"/>
       </MsiPackage>
-      <ExePackage DisplayName="WSL Kernel Install" InstallCondition="WSLCheckbox = 1" SourceFile="artifacts\podman-wslkerninst.exe"/>
+      <ExePackage DisplayName="WSL Kernel Install" InstallCondition='(MachineProvider = "wsl") AND (WSLCheckbox = 1)' SourceFile="artifacts\podman-wslkerninst.exe"/>
     </Chain>
     <OptionalUpdateRegistration/>
   </Bundle>

contrib/win-installer/podman-msihooks/check.c

@@ -2,7 +2,9 @@
 #include <MsiQuery.h>
 
 BOOL isWSLEnabled();
+BOOL isHyperVEnabled();
 LPCWSTR boolToNStr(BOOL bool);
+LPCSTR szSvcNameHyperv = TEXT("vmms");
 
 /**
  * CheckWSL is a custom action loaded by the Podman Windows installer
@@ -28,6 +30,19 @@ LPCWSTR boolToNStr(BOOL bool);
 	return 0;
 }
 
+/**
+ * CheckHyperV is a custom action loaded by the Podman Windows installer
+ * to determine whether the system already has Hyper-V installed.
+ */
+
+ __declspec(dllexport) UINT __cdecl CheckHyperV(MSIHANDLE hInstall) {
+	BOOL hasHyperV = isHyperVEnabled();
+	// Set a property with the HyperV state for the installer to operate on
+	MsiSetPropertyW(hInstall, L"HAS_HYPERVFEATURE", boolToNStr(hasHyperV));
+
+	return 0;
+}
+
 LPCWSTR boolToNStr(BOOL bool) {
 	return bool ? L"1" : L"0";
 }
@@ -64,3 +79,52 @@ BOOL isWSLEnabled() {
 
 	return exitCode == 0;
 }
+
+BOOL isHyperVEnabled() {
+	/*
+	 * Checks if the Windows service `vmms` is running to
+	 * determine if Hyper-V is enabled.
+	 */
+	SC_HANDLE schSCManager;
+	SC_HANDLE schService;
+	SERVICE_STATUS_PROCESS ssStatus;
+	DWORD dwBytesNeeded;
+
+	// Get a handle to the SCM database.
+	schSCManager = OpenSCManager(
+		NULL,                    // local computer
+		NULL,                    // servicesActive database
+		SERVICE_QUERY_STATUS);   // service query access rights
+
+	if (NULL == schSCManager) {
+		return FALSE;
+	}
+
+	// Get a handle to the service.
+	schService = OpenService(
+		schSCManager,
+		szSvcNameHyperv,
+		SERVICE_QUERY_STATUS);
+
+	if (schService == NULL) {
+		CloseServiceHandle(schSCManager);
+		return FALSE;
+	}
+
+	// Check the status
+	if (!QueryServiceStatusEx(
+			schService,                     // handle to service
+			SC_STATUS_PROCESS_INFO,         // information level
+			(LPBYTE) &ssStatus,             // address of structure
+			sizeof(SERVICE_STATUS_PROCESS), // size of structure
+			&dwBytesNeeded ) ) {
+		CloseServiceHandle(schService);
+		CloseServiceHandle(schSCManager);
+		return FALSE;
+	}
+
+	CloseServiceHandle(schService);
+	CloseServiceHandle(schSCManager);
+
+	return ssStatus.dwCurrentState == SERVICE_RUNNING;
+}

contrib/win-installer/podman.wxs

@@ -20,7 +20,83 @@
     <Media Id="1" Cabinet="Podman.cab" EmbedCab="yes"/>
     <MajorUpgrade AllowDowngrades="yes"/>
     <Property Id="DiskPrompt" Value="Red Hat's Podman $(var.VERSION) Installation"/>
-    <SetProperty Id="WSL_INSTALL" Before="AppSearch" Value="1" Sequence="first">NOT (WITH_WSL = 0)</SetProperty>
+    <Property Id="MACHINE_PROVIDER" Value="wsl"/>
+    <Property Id="MACHINE_PROVIDER_CONFIG_FILE_PATH">
+      <DirectorySearch Id="CommonAppDataFolderSearch" Path="[CommonAppDataFolder]">
+        <DirectorySearch Id="ContainersFolderSearch" Path="containers">
+          <DirectorySearch Id="ContainersConfDFolderSearch" Path="containers.conf.d">
+            <FileSearch Name="99-podman-machine-provider.conf"/>
+          </DirectorySearch>
+        </DirectorySearch>
+      </DirectorySearch>
+    </Property>
+    <Property Id="MAIN_EXECUTABLE_FILE_PATH">
+      <DirectorySearch Id="ProgramFiles64FolderSearch" Path="[ProgramFiles64Folder]">
+        <DirectorySearch Id="RedHatFolderSearch" Path="RedHat">
+          <DirectorySearch Id="PodmanFolderSearch" Path="Podman">
+            <FileSearch Name="podman.exe"/>
+          </DirectorySearch>
+        </DirectorySearch>
+      </DirectorySearch>
+    </Property>
+    <!--
+      Property WSL_INSTALL is set at runtime and used as the condition to run the `WSLFeatureComponent` Component:
+      WSL is installed only if all these conditions are met:
+        - WSL isn't already installed
+        - The user has set property `MACHINE_PROVIDER` to "wsl"
+        - The user hasn't set property `WITH_WSL` to 0
+     -->
+    <SetProperty Id="WSL_INSTALL" Before="AppSearch" Value="1" Sequence="first">
+      <![CDATA[
+            (HAS_WSLFEATURE = 0)
+        AND (MACHINE_PROVIDER = "wsl")
+        AND (NOT (WITH_WSL = 0))
+      ]]>
+    </SetProperty>
+    <!--
+      Property HYPERV_INSTALL is set at runtime and used as the condition to run the `HyperVFeatureComponent` Component:
+      HyperV is installed only if all these conditions are met:
+        - HyperV isn't already installed
+        - The user has set property `MACHINE_PROVIDER` to "hyperv"
+        - The user hasn't set property `WITH_HYPERV` to 0
+     -->
+    <SetProperty Id="HYPERV_INSTALL" Before="AppSearch" Value="1" Sequence="first">
+      <![CDATA[
+            (HAS_HYPERVFEATURE = 0)
+        AND (MACHINE_PROVIDER = "hyperv")
+        AND (NOT (WITH_HYPERV = 0))
+      ]]>
+    </SetProperty>
+    <!--
+      Property CREATE_MACHINE_PROVIDER_CONFIG_FILE is set at runtime and used as the condition to run the `MachineProviderConfigFile` Component:
+      The machine provider config file is created only if all these conditions are met:
+        - The user hasn't set property `SKIP_CONFIG_FILE_CREATION` to 1
+        - The machine provider config file ($PROGRAMDATA/containers/containers.conf.d/99-podman-machine-provider.conf) doesn't exist
+        - The main executable file ($PROGRAMDATA/RedHat/Podman/podman.exe) doesn't exist
+     -->
+    <SetProperty Id="CREATE_MACHINE_PROVIDER_CONFIG_FILE" After="AppSearch" Value="1" Sequence="first">
+      <![CDATA[
+            (NOT (SKIP_CONFIG_FILE_CREATION = 1))
+        AND (NOT MACHINE_PROVIDER_CONFIG_FILE_PATH)
+        AND (NOT MAIN_EXECUTABLE_FILE_PATH)
+      ]]>
+    </SetProperty>
+    <!--
+      Property HIDE_PROVIDER_CHOICE is set at runtime and used as the condition to hide the Machine Provider
+      choice from the MSI GUI (the Radio Button Group and other related controls):
+      The machine provider choice isn't shown to the user if one of these conditions are met:
+        - The user has set the property `SKIP_CONFIG_FILE_CREATION` to 1
+        - The machine provider config file ($PROGRAMDATA/containers/containers.conf.d/99-podman-machine-provider.conf) exists
+        - The main executable file ($PROGRAMDATA/RedHat/Podman/podman.exe) exists
+     -->
+    <SetProperty Id="HIDE_PROVIDER_CHOICE" After="AppSearch" Value="1" Sequence="first">
+      <![CDATA[
+           (SKIP_CONFIG_FILE_CREATION = 1)
+        OR (MACHINE_PROVIDER_CONFIG_FILE_PATH)
+        OR (MAIN_EXECUTABLE_FILE_PATH)
+      ]]>
+    </SetProperty>
+
     <Directory Id="TARGETDIR" Name="SourceDir">
       <Directory Id="ProgramFiles64Folder" Name="PFiles">
         <Directory Id="RedHatPFiles" Name="RedHat">
@@ -48,6 +124,22 @@
           </Directory>
         </Directory>
       </Directory>
+      <!--
+        The following code creates the `containers/containers.conf.d` folder under the system wide
+        `$CommonAppDataFolder`. That's preferred to the user specific `$AppDataFolder` to avoid the
+        Windows Installer ICE91 warning https://learn.microsoft.com/en-us/windows/win32/msi/ice91.
+      -->
+      <Directory Id="CommonAppDataFolder">
+        <Directory Id="CONFIGDIR" Name="containers">
+          <Directory Id="ContainersConfigSubDir" Name="containers.conf.d">
+            <Component Id="MachineProviderConfigFile" Guid="C32C0040-D9AF-4155-AC7E-465B63B6BE3B">
+              <CreateFolder />
+              <IniFile Id="MachineProviderConfigFile" Action="createLine" Directory="ContainersConfigSubDir" Section="machine" Name="99-podman-machine-provider.conf" Key="provider" Value='"[MACHINE_PROVIDER]"' />
+              <Condition>CREATE_MACHINE_PROVIDER_CONFIG_FILE</Condition>
+            </Component>
+          </Directory>
+        </Directory>
+      </Directory>
       <Directory Id="EnvEntries">
         <Component Id="EnvEntriesComponent" Guid="b662ec43-0e0e-4018-8bf3-061904bb8f5b" Win64="yes">
           <CreateFolder />
@@ -57,16 +149,24 @@
     </Directory>
 
     <CustomAction Id="OpenGuide" BinaryKey="WixCA" DllEntry="WixShellExec" Impersonate="yes" />
-    <CustomAction Id="CheckWSL" BinaryKey="PodmanHooks" Execute="immediate" DllEntry="CheckWSL" />
+    <CustomAction Id="CheckWSL" BinaryKey="PodmanHooks" Execute="firstSequence" DllEntry="CheckWSL" />
+    <CustomAction Id="CheckHyperV" BinaryKey="PodmanHooks" Execute="firstSequence" DllEntry="CheckHyperV" />
     <CustomActionRef Id="WixBroadcastEnvironmentChange" />
     <ComponentGroup Id="WSLFeature" Directory="INSTALLDIR">
-      <Component>
+      <Component Id="WSLFeatureComponent" Guid="F6A693BC-186C-4E64-8015-C3073013B3A8">
-        <Condition>(NOT Installed) AND WSL_INSTALL = 1 AND HAS_WSLFEATURE = 0</Condition>
+        <Condition>(NOT Installed) AND WSL_INSTALL = 1</Condition>
-        <File Source="$(sys.SOURCEFILEPATH)"/>
+        <CreateFolder />
         <PanelSW:Dism EnableFeature="VirtualMachinePlatform" ErrorHandling="prompt"/>
         <PanelSW:Dism EnableFeature="Microsoft-Windows-Subsystem-Linux" ErrorHandling="prompt"/>
       </Component>
     </ComponentGroup>
+    <ComponentGroup Id="HyperVFeature" Directory="INSTALLDIR">
+      <Component Id="HyperVFeatureComponent" Guid="F7B2D4C9-6C89-46BB-B4EA-FF39424972F3">
+        <Condition>(NOT Installed) AND HYPERV_INSTALL = 1</Condition>
+        <CreateFolder />
+        <PanelSW:Dism EnableFeature="Microsoft-Hyper-V" ErrorHandling="prompt"/>
+      </Component>
+    </ComponentGroup>
     <Feature Id="Complete" Level="1">
       <ComponentRef Id="INSTALLDIR_Component"/>
       <ComponentRef Id="EnvEntriesComponent"/>
@@ -76,8 +176,10 @@
       <ComponentRef Id="GvProxyExecutable"/>
       <?endif?>
       <ComponentRef Id="GuideHTMLComponent"/>
+      <ComponentRef Id="MachineProviderConfigFile"/>
       <ComponentGroupRef Id="ManFiles"/>
       <ComponentGroupRef Id="WSLFeature"/>
+      <ComponentGroupRef Id="HyperVFeature"/>
     </Feature>
 
     <Icon Id="podman.ico" SourceFile="resources/podman-logo.ico"/>
@@ -94,8 +196,13 @@
     </UI>
 
     <InstallExecuteSequence>
-      <Custom Action="CheckWSL" After="SetWSL_INSTALL">WSL_INSTALL = 1</Custom>
+      <Custom Action="CheckWSL" Before="SetWSL_INSTALL" />
-      <ForceReboot Before="StopServices">(NOT Installed) AND WSL_INSTALL = 1 AND HAS_WSLFEATURE = 0 AND NOT AFTERREBOOT</ForceReboot>
+      <Custom Action="CheckHyperV" Before="SetHYPERV_INSTALL" />
+      <ForceReboot Before="StopServices">
+             (NOT Installed)
+        AND ((WSL_INSTALL = 1) OR (HYPERV_INSTALL = 1))
+        AND  (NOT AFTERREBOOT)
+      </ForceReboot>
     </InstallExecuteSequence>
     <Binary Id="PodmanHooks" SourceFile="artifacts/podman-msihooks.dll" />
   </Product>

contrib/win-installer/welcome-install-dlg.wxs

@@ -5,10 +5,28 @@
                 <Control Id="Bitmap" Type="Bitmap" X="0" Y="0" Width="370" Height="234" TabSkip="no" Text="!(loc.WelcomeDlgBitmap)" />
                 <Control Id="Title" Type="Text" X="135" Y="20" Width="220" Height="60" Transparent="yes" NoPrefix="yes" Text="!(loc.WelcomeDlgTitle)" />
                 <Control Id="BottomLine" Type="Line" X="0" Y="234" Width="370" Height="0" />
-                <Control Id="Description" Type="Text" X="135" Y="80" Width="220" Height="60" Transparent="yes" NoPrefix="yes" Text="!(loc.WelcomeDlgDescription)" />
+                <Control Id="Description" Type="Text" X="135" Y="50" Width="220" Height="60" Transparent="yes" NoPrefix="yes" Text="!(loc.WelcomeDlgDescription)" />
-                <Control Id="WSLInstallCheckbox" Type="CheckBox" X="135" Y="135" Width="226" Height="18" CheckBoxValue="1" Property="WSL_INSTALL" Default="no" Text="Install WSL Feature (if needed)" />
+                <Control Id="ProviderChoice" Type="Text" X="135" Y="115" Width="220" Height="18" Transparent="yes" NoPrefix="yes" Text="Select the Virtualization Provider for the Podman machine:">
-
+                    <Condition Action="hide">HIDE_PROVIDER_CHOICE</Condition>
-                <Control Id="Back" Type="PushButton" X="156" Y="243" Width="56" Height="17" Disabled="yes" Text="!(loc.WixUIBack)"/>
+                </Control>
+                <Control Type="RadioButtonGroup" Property="MACHINE_PROVIDER" Id="MachineProviderRadioButtonGroup" Width="226" Height="30" X="135" Y="135">
+                    <RadioButtonGroup Property="MACHINE_PROVIDER">
+                        <RadioButton Text="Windows Linux Subsystem (WSLv2)" Height="15" Value="wsl" Width="226" X="10" Y="0" />
+                        <RadioButton Text="Windows Hyper-V" Height="15" Value="hyperv" Width="226" X="10" Y="15" />
+                    </RadioButtonGroup>
+                     <Condition Action="hide">HIDE_PROVIDER_CHOICE</Condition>
+                </Control>
+                <Control Id="WSLInstallCheckbox" Type="CheckBox" X="135" Y="190" Width="226" Height="18" CheckBoxValue="1" Property="WSL_INSTALL" Default="no" Text="Install WSL if needed (requires reboot)">
+                    <Condition Action="show">MACHINE_PROVIDER = "wsl"</Condition>
+                    <Condition Action="hide">MACHINE_PROVIDER = "hyperv" OR HIDE_PROVIDER_CHOICE</Condition>
+                    <Condition Action="hide">HAS_WSLFEATURE = 1</Condition>
+                </Control>
+                <Control Id="HyperVInstallCheckbox" Type="CheckBox" X="135" Y="190" Width="226" Height="18" CheckBoxValue="1" Property="HYPERV_INSTALL" Default="no" Text="Install Hyper-V if needed (requires reboot)">
+                    <Condition Action="show">MACHINE_PROVIDER = "hyperv"</Condition>
+                    <Condition Action="hide">MACHINE_PROVIDER = "wsl" OR HIDE_PROVIDER_CHOICE</Condition>
+                    <Condition Action="hide">HAS_HYPERVFEATURE = 1</Condition>
+                </Control>
+                <Control Id="Back" Type="PushButton" X="156" Y="243" Width="56" Height="17" Disabled="yes" Text="!(loc.WixUIBack)" />
                 <Control Id="Install" Type="PushButton" ElevationShield="yes" X="212" Y="243" Width="80" Height="17" Default="yes" Text="!(loc.WelcomeEulaDlgInstall)">
                     <Publish Event="SpawnWaitDialog" Value="WaitForCostingDlg">!(wix.WixUICostingPopupOptOut) OR CostingComplete = 1</Publish>
                     <Publish Event="EndDialog" Value="Return"><![CDATA[OutOfDiskSpace <> 1]]></Publish>