update changelog

specified. This causes WinFSP to think that any O_APPEND requests are
actually read-only. This adds an additional check for the
FILE_APPEND_DATA flag so that we can ensure the request is sent with at
least O_WRONLY and O_APPEND set.

Changelog.asciidoc

@@ -1,6 +1,101 @@
 = Changelog
 
 
+v1.5B4 (2019.3 B4)::
+
+Changes since v1.4:
+
+* [GEN] WinFsp file systems can now be used by WSLinux. File systems must enable this support by setting the `FSP_FSCTL_VOLUME_PARAMS::WslFeatures` bit. Use the command `sudo mount -t drvfs x: /mnt/x` to mount.
+* [GEN] Extended attribute support has been added for all WinFsp API's: native, .NET, FUSE2 and FUSE3.
+* [GEN] Mount Manager support has been added and it works for current and new file systems:
+** If the file system mountpoint is in the syntax `\\.\X:` then the Mount Manager is used.
+** If the file system mountpoint is in the syntax `X:` then `DefineDosDeviceW` is used (i.e. same as today).
+** If the file system mountpoint is in the syntax `X:\DIR` then a reparse point is used and the file system is mounted as a directory (i.e. same as today).
+** Caveats:
+*** It requires Administrator access. This is because opening the `\\.\MountPointManager` device requires Administrator access.
+*** It currently works with drives (`\\.\X:`) but not directories (`\\.\X:\DIR`).
+*** Mount Manager drives created by WinFsp are transient. WinFsp takes various steps to ensure that this is the case.
+*** Mount Manager drives are global and are visible across Terminal Services sessions (they go into the `\GLOBAL??` portion of the NT namespace).
+* [FSD] Support for kernel-mode file systems on top of WinFsp has been added. See `FspFsextProvider`. This is in preparation for WinFuse - FUSE for Windows and WSLinux.
+* [FSD] FastIO support has been added. FastIO operations are enabled on cache-enabled file systems with the notable exception of `FastIoQueryOpen`, which allows opening files in kernel mode; this operation requires the file system to specify the `FSP_FSCTL_VOLUME_PARAMS::AllowOpenInKernelMode` flag.
+* [FSD] Support for `FileFsSectorSizeInformation` and `IOCTL_STORAGE_QUERY_PROPERTY / StorageAccessAlignmentProperty` has been added.
+* [DLL] The `FspFileSystemStartDispatcher` default number of threads (`ThreadCount==0`) has been changed. See commit 3902874ac93fe40685d9761f46a96358ba24f24c for more.
+* [FUSE] FUSE has new `-o UserName=DOMAIN+USERNAME` and `-o GroupName=DOMAIN+GROUPNAME` options. These function like the `-o uid=UID` and `-o gid=GID` options, but accept Windows user and groups names.
+* [FUSE] FUSE has new `-o dothidden` option that is used to add the Windows hidden file attribute to files that start with a dot.
+* [FUSE] FUSE has new `-o create_file_umask=nnn` and `-o create_dir_umask=nnn` options that allow for more control than the `-o create_umask=nnn` option.
+* [FUSE] FUSE has new `--ExactFileSystemName=FSNAME` option that removes the "FUSE-" prefix from the file system name. (Use with caution: see discussion in PR #251.) (Thanks @johntyner.)
+* [.NET] The .NET API now supports asynchronous handling of `Read`, `Write` and `ReadDirectory`. (Thanks @dworkin.)
+* [.NET] The .NET API now supports fine-grained timeouts (`VolumeInfoTimeout`, `DirInfoTimeout`, etc).
+* [.NET] The .NET API has new method `FileSystemHost.MountEx` that adds a `ThreadCount` parameter.
+* [LAUNCH] The Launcher can now rewrite path arguments passed to file systems during launching using "Path Transformation Language". See commit a73f1b95592617ac7484e16c2e642573a4d65644 for more.
+* [MEMFS] A new memfs FUSE3 file system written in C++ has been added. See `tst/memfs-fuse3`.
+* [AIRFS] John Oberschelp has done some fantastic work adding persistence to the airfs file system. (Thanks @JohnOberschelp.)
+* [FIX] Fixes for very large (> 4GiB) files. (Thanks @dworkin.)
+* [FIX] A fix for how FUSE handles the return value from `opendir`. (GitHub issue billziss-gh/sshfs-win#54)
+* [FIX] A fix for an invalid UID to SID mapping on domains with a lot of users. (Thanks @sganis.)
+* [FIX] A fix on the C++ layer. (Thanks @colatkinson.)
+* Other fixes and improvements.
+
+
+v1.5B3 (2019.3 B3)::
+
+Changes since v1.4:
+
+* [GEN] WinFsp file systems can now be used by WSLinux. Use the command `sudo mount -t drvfs x: /mnt/x` to mount.
+* [GEN] Extended attribute support has been added for all WinFsp API's: native, .NET, FUSE2 and FUSE3.
+* [GEN] Mount Manager support has been added and it works for current and new file systems:
+** If the file system mountpoint is in the syntax `\\.\X:` then the Mount Manager is used.
+** If the file system mountpoint is in the syntax `X:` then `DefineDosDeviceW` is used (i.e. same as today).
+** If the file system mountpoint is in the syntax `X:\DIR` then a reparse point is used and the file system is mounted as a directory (i.e. same as today).
+** Caveats:
+*** It requires Administrator access. This is because opening the `\\.\MountPointManager` device requires Administrator access.
+*** It currently works with drives (`\\.\X:`) but not directories (`\\.\X:\DIR`).
+*** Mount Manager drives created by WinFsp are transient. WinFsp takes various steps to ensure that this is the case.
+*** Mount Manager drives are global and are visible across Terminal Services sessions (they go into the `\GLOBAL??` portion of the NT namespace).
+* [FSD] Support for kernel-mode file systems on top of WinFsp has been added. See `FspFsextProvider`. This is in preparation for WinFuse - FUSE for Windows and WSLinux.
+* [FSD] FastIO support has been added. FastIO operations are enabled on cache-enabled file systems with the notable exception of `FastIoQueryOpen`, which allows opening files in kernel mode; this operation requires the file system to specify the `FSP_FSCTL_VOLUME_PARAMS::AllowOpenInKernelMode` flag.
+* [FSD] Support for `FileFsSectorSizeInformation` and `IOCTL_STORAGE_QUERY_PROPERTY / StorageAccessAlignmentProperty` has been added.
+* [DLL] The `FspFileSystemStartDispatcher` default number of threads (`ThreadCount==0`) has been changed. See commit 3902874ac93fe40685d9761f46a96358ba24f24c for more.
+* [FUSE] FUSE has new `-o UserName=DOMAIN+USERNAME` and `-o GroupName=DOMAIN+GROUPNAME` options. These function like the `-o uid=UID` and `-o gid=GID` options, but accept Windows user and groups names.
+* [FUSE] FUSE has new `-o dothidden` option that is used to add the Windows hidden file attribute to files that start with a dot.
+* [FUSE] FUSE has new `-o create_file_umask=nnn` and `-o create_dir_umask=nnn` options that allow for more control than the `-o create_umask=nnn` option.
+* [FUSE] FUSE has new `--ExactFileSystemName=FSNAME` option that removes the "FUSE-" prefix from the file system name. (Use with caution: see discussion in PR #251.) (Thanks @johntyner.)
+* [.NET] The .NET API now supports asynchronous handling of `Read`, `Write` and `ReadDirectory`. (Thanks @dworkin.)
+* [.NET] The .NET API now supports fine-grained timeouts (`VolumeInfoTimeout`, `DirInfoTimeout`, etc).
+* [.NET] The .NET API has new method `FileSystemHost.MountEx` that adds a `ThreadCount` parameter.
+* [LAUNCH] The Launcher can now rewrite path arguments passed to file systems during launching using "Path Transformation Language". See commit a73f1b95592617ac7484e16c2e642573a4d65644 for more.
+* [MEMFS] A new memfs FUSE3 file system written in C++ has been added. See `tst/memfs-fuse3`.
+* [AIRFS] John Oberschelp has done some fantastic work adding persistence to the airfs file system. (Thanks @JohnOberschelp.)
+* [FIX] Fixes for very large (> 4GiB) files. (Thanks @dworkin.)
+* [FIX] A fix for how FUSE handles the return value from `opendir`. (GitHub issue billziss-gh/sshfs-win#54)
+* [FIX] A fix for an invalid UID to SID mapping on domains with a lot of users. (Thanks @sganis.)
+* [FIX] A fix on the C++ layer. (Thanks @colatkinson.)
+* Other fixes and improvements.
+
+
+v1.5B2 (2019.3 B2)::
+
+Changes since v1.4:
+
+* [GEN] WinFsp file systems can now be used by WSLinux. Use the command `sudo mount -t drvfs x: /mnt/x` to mount.
+* [GEN] Extended attribute support has been added for all WinFsp API's: native, .NET, FUSE2 and FUSE3.
+* [FSD] Support for kernel-mode file systems on top of WinFsp has been added. See `FspFsextProvider`. This is in preparation for WinFuse - FUSE for Windows and WSLinux.
+* [FSD] FastIO support has been added. FastIO operations are enabled on cache-enabled file systems with the notable exception of `FastIoQueryOpen`, which allows opening files in kernel mode; this operation requires the file system to specify the `FSP_FSCTL_VOLUME_PARAMS::AllowOpenInKernelMode` flag.
+* [DLL] The `FspFileSystemStartDispatcher` default number of threads (`ThreadCount==0`) has been changed. See commit 3902874ac93fe40685d9761f46a96358ba24f24c for more.
+* [FUSE] FUSE has new `-o UserName=DOMAIN\USERNAME` and `-o GroupName=DOMAIN\GROUPNAME` options. These function like the `-o uid=UID` and `-o gid=GID` options, but accept Windows user and groups names.
+* [FUSE] FUSE has new `-o dothidden` option that is used to add the Windows hidden file attribute to files that start with a dot.
+* [FUSE] FUSE has new `-o create_file_umask=nnn` and `-o create_dir_umask=nnn` options that allow for more control than the `-o create_umask=nnn` option.
+* [.NET] The .NET API now supports asynchronous handling of `Read`, `Write` and `ReadDirectory`. (Thanks @dworkin.)
+* [.NET] The .NET API now supports fine-grained timeouts (`VolumeInfoTimeout`, `DirInfoTimeout`, etc).
+* [.NET] The .NET API has new method `FileSystemHost.MountEx` that adds a `ThreadCount` parameter.
+* [LAUNCH] The Launcher can now rewrite path arguments passed to file systems during launching using "Path Transformation Language". See commit a73f1b95592617ac7484e16c2e642573a4d65644 for more.
+* [FIX] Fixes for very large (> 4GiB) files. (Thanks @dworkin.)
+* [FIX] A fix for how FUSE handles the return value from `opendir`. (GitHub issue billziss-gh/sshfs-win#54)
+* [FIX] A fix for an invalid UID to SID mapping on domains with a lot of users. (Thanks @sganis.)
+* [FIX] A fix on the C++ layer. (Thanks @colatkinson.)
+* Other fixes and improvements.
+
+
 v1.5B1 (2019.3 B1)::
 
 Changes since v1.4:
@@ -11,6 +106,7 @@ Changes since v1.4:
 * A fix for an invalid UID to SID mapping on domains with a lot of users. (Thanks @sganis.)
 * A fix on the C++ layer. (Thanks @colatkinson.)
 
+
 v1.4.19049 (2019.2)::
 
 Changes since v1.3:

Contributors.asciidoc

@@ -56,11 +56,13 @@ CONTRIBUTOR LIST
 |===
 |Ben Rubson                                                     |ben.rubson at gmail.com
 |Bill Zissimopoulos                                             |billziss at navimatics.com
+|Brett Dutro                                                    |brett.dutro at gmail.com
 |Colin Atkinson (Atakama, https://atakama.com)                  |colin at atakama.com
 |Felix Croes                                                    |felix at dworkin.nl
 |Francois Karam (KS2, http://www.ks2.fr)                        |francois.karam at ks2.fr
 |Fritz Elfert                                                   |fritz-github at fritz-elfert.de
 |John Oberschelp                                                |john at oberschelp.net
+|John Tyner                                                     |jtyner at gmail.com
 |Sam Kelly (DuroSoft Technologies LLC, https://durosoft.com)    |sam at durosoft.com
 |Santiago Ganis                                                 |sganis at gmail.com
 |Tobias Urlaub                                                  |saibotu at outlook.de

README.md

@@ -96,6 +96,7 @@ The project source code is organized as follows:
     * :file_folder: [src/dll/fuse3](src/dll/fuse3): Source code to the FUSE3 compatibility layer.
     * :file_folder: [src/dotnet](src/dotnet): Source code to the .NET layer.
     * :file_folder: [src/fsptool](src/fsptool): Source code to fsptool command line utility.
+    * :file_folder: [src/ku](src/ku): Source code that can be used from kernel or user mode.
     * :file_folder: [src/launcher](src/launcher): Source code to the launcher service and the launchctl utility.
     * :file_folder: [src/sys](src/sys): Source code to the WinFsp FSD.
 * :file_folder: [opt/cygfuse](opt/cygfuse): Source code to the FUSE for Cygwin package.
@@ -107,8 +108,12 @@ The project source code is organized as follows:
 
 In order to build WinFsp you will need the following:
 
-* Visual Studio 2015
+* Visual Studio 2015 - 2019
 * Windows Driver Kit (WDK) 10
+    - **NOTE**: When using the latest WDK (Windows 10.0.18362.1) with Visual Studio 2015 you may get an error about a missing task `ValidateNTTargetVersion`. The fix is to edit the file `\Program Files (x86)\Windows Kits\10\build\WindowsDriver.Common.targets` and modify the `UsingTask` line for `ValidateNTTargetVersion` as follows:
+        ```
+        <UsingTask TaskName="ValidateNTTargetVersion" AssemblyFile="$(WDKContentRoot)build\bin\Microsoft.DriverKit.Build.Tasks.16.0.dll"/>
+        ```
 * [Wix toolset](http://wixtoolset.org)
 
 To fully build WinFsp (including the installer) you must use `tools\build.bat`. By default it builds a Release build, but you can choose either the Debug or Release configuration by using the syntax:

appveyor.yml

@@ -15,6 +15,13 @@ init:
 #- ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
 
 install:
+- ps: |
+    # Hack to make WDK 1903 work on VS2015.
+    # See https://github.com/appveyor-tests/WDK-10.0.14393.0/blob/31cf12217fe0c92b218c70d7027dfe145be4f4cb/appveyor.yml#L7
+    [xml]$targets = get-content "C:\Program Files (x86)\Windows Kits\10\build\WindowsDriver.Common.targets"
+    $usingTask = $targets.ChildNodes[1].UsingTask | ? {$_.TaskName -eq "ValidateNTTargetVersion"}
+    $usingTask.AssemblyFile = '$(WDKContentRoot)build\bin\Microsoft.DriverKit.Build.Tasks.16.0.dll'
+    $targets.Save("C:\Program Files (x86)\Windows Kits\10\build\WindowsDriver.Common.targets")
 - git submodule update --init --recursive
 - appveyor AddMessage "Change boot configuration and reboot" -Category Information
 - bcdedit /set testsigning on

build/VStudio/.gitignore

@@ -4,3 +4,6 @@ build
 *.vcproj.*
 *.vcxproj.user
 *.csproj.user
+*.VC.db
+*.VC.opendb
+.vs

build/VStudio/installer/CustomActions/CustomActions.vcxproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\version.properties" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -14,18 +15,18 @@
     <ProjectGuid>{95C223E6-B5F1-4FD0-9376-41CDBC824445}</ProjectGuid>
     <RootNamespace>CustomActions</RootNamespace>
     <Keyword>Win32Proj</Keyword>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
     <WholeProgramOptimization>true</WholeProgramOptimization>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
@@ -68,7 +69,6 @@
       <AdditionalDependencies>msi.lib;dutil.lib;wcautil.lib;Version.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(WIX)sdk\VS2015\lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <ModuleDefinitionFile>CustomActions.def</ModuleDefinitionFile>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <TargetMachine>MachineX86</TargetMachine>
       <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
@@ -92,7 +92,6 @@
       <AdditionalDependencies>msi.lib;dutil.lib;wcautil.lib;Version.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(WIX)sdk\VS2015\lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <ModuleDefinitionFile>CustomActions.def</ModuleDefinitionFile>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Windows</SubSystem>
       <OptimizeReferences>true</OptimizeReferences>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>

build/VStudio/installer/Product.wxs

@@ -369,6 +369,23 @@
                     <File Name="uninstall.sh" KeyPath="yes" />
                 </Component>
             </Directory>
+            <Directory Id="OPTDIR.fsext" Name="fsext" FileSource="..\..\..\opt\fsext">
+                <Directory Id="OPTDIR.fsext.inc" Name="inc">
+                    <Directory Id="OPTDIR.fsext.inc.winfsp" Name="winfsp">
+                        <Component Id="C.fsext.h">
+                            <File Name="fsext.h" KeyPath="yes" />
+                        </Component>
+                    </Directory>
+                </Directory>
+                <Directory Id="OPTDIR.fsext.lib" Name="lib">
+                    <Component Id="C.fsext.winfsp_x64.lib">
+                        <File Id="FILE.fsext.winfsp_x64.lib" Name="winfsp-x64.lib" KeyPath="yes" />
+                    </Component>
+                    <Component Id="C.fsext.winfsp_x86.lib">
+                        <File Id="FILE.fsext.winfsp_x86.lib" Name="winfsp-x86.lib" KeyPath="yes" />
+                    </Component>
+                </Directory>
+            </Directory>
         </DirectoryRef>
         <DirectoryRef Id="SMPDIR" FileSource="..\..\..\tst">
             <Directory Id="SMPDIR.memfs" Name="memfs">
@@ -382,6 +399,29 @@
                     <File Name="memfs-main.c" KeyPath="yes" />
                 </Component>
             </Directory>
+            <Directory Id="SMPDIR.memfs_fuse3" Name="memfs-fuse3">
+                <Component Id="C.memfs_fuse3.cpp">
+                    <File Name="memfs-fuse3.cpp" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.compat.h">
+                    <File Id="F.memfs_fuse3.compat.h" Name="compat.h" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.sln">
+                    <File Name="memfs-fuse3.sln" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.vcxproj">
+                    <File Name="memfs-fuse3.vcxproj" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.vcxproj.filters">
+                    <File Name="memfs-fuse3.vcxproj.filters" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.Makefile">
+                    <File Id="F.memfs_fuse3.Makefile" Name="Makefile" KeyPath="yes" />
+                </Component>
+                <Component Id="C.memfs_fuse3.README.md">
+                    <File Id="F.memfsx_fuse3.README.md" Name="README.md" KeyPath="yes" />
+                </Component>
+            </Directory>
             <Directory Id="SMPDIR.memfs_dotnet" Name="memfs-dotnet">
                 <Component Id="C.memfs_dotnet.Program.cs">
                     <File Id="FILE.memfs_dotnet.Program.cs" Name="Program.cs" KeyPath="yes" />
@@ -391,6 +431,12 @@
                 <Component Id="C.airfs.cpp">
                     <File Name="airfs.cpp" KeyPath="yes" />
                 </Component>
+                <Component Id="C.persistence.cpp">
+                    <File Name="persistence.cpp" KeyPath="yes" />
+                </Component>
+                <Component Id="C.common.h">
+                    <File Name="common.h" KeyPath="yes" />
+                </Component>
                 <Component Id="C.airfs.sln">
                     <File Name="airfs.sln" KeyPath="yes" />
                 </Component>
@@ -580,13 +626,27 @@
             <ComponentRef Id="C.fuse.install.sh" />
             <ComponentRef Id="C.fuse.uninstall.sh" />
         </ComponentGroup>
+        <ComponentGroup Id="C.WinFsp.opt.fsext">
+            <ComponentRef Id="C.fsext.h" />
+            <ComponentRef Id="C.fsext.winfsp_x64.lib" />
+            <ComponentRef Id="C.fsext.winfsp_x86.lib" />
+        </ComponentGroup>
         <ComponentGroup Id="C.WinFsp.smp">
             <ComponentRef Id="C.memfs_x64.exe" />
             <ComponentRef Id="C.memfs_x86.exe" />
             <ComponentRef Id="C.memfs.h" />
             <ComponentRef Id="C.memfs.cpp" />
             <ComponentRef Id="C.memfs_main.c" />
+            <ComponentRef Id="C.memfs_fuse3.cpp" />
+            <ComponentRef Id="C.memfs_fuse3.compat.h" />
+            <ComponentRef Id="C.memfs_fuse3.sln" />
+            <ComponentRef Id="C.memfs_fuse3.vcxproj" />
+            <ComponentRef Id="C.memfs_fuse3.vcxproj.filters" />
+            <ComponentRef Id="C.memfs_fuse3.Makefile" />
+            <ComponentRef Id="C.memfs_fuse3.README.md" />
             <ComponentRef Id="C.airfs.cpp" />
+            <ComponentRef Id="C.persistence.cpp" />
+            <ComponentRef Id="C.common.h" />
             <ComponentRef Id="C.airfs.sln" />
             <ComponentRef Id="C.airfs.vcxproj" />
             <ComponentRef Id="C.airfs.vcxproj.filters" />
@@ -694,6 +754,16 @@
                 <ComponentGroupRef Id="C.WinFsp.smp.net" />
                 <ComponentGroupRef Id="C.WinFsp.sym" />
             </Feature>
+            <Feature
+                Id="F.KernelDeveloper"
+                Level="1000"
+                Title="Kernel Developer"
+                Description="Additional files needed for in-kernel development."
+                AllowAdvertise="no"
+                InstallDefault="local"
+                Absent="allow">
+                <ComponentGroupRef Id="C.WinFsp.opt.fsext" />
+            </Feature>
             <Feature
                 Id="F.Cygfuse"
                 Level="1000"

build/VStudio/testing/fsbench.vcxproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\version.properties" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,32 +23,32 @@
     <ProjectGuid>{C4E1E9E5-0959-488E-8C6A-C327CC81BEFB}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>fsbench</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -106,7 +107,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -122,7 +122,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -142,7 +141,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -162,7 +160,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>

build/VStudio/testing/fscrash.vcxproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\version.properties" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,32 +23,32 @@
     <ProjectGuid>{10757011-749D-4954-873B-AE38D8145472}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>fscrash</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -106,7 +107,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -122,7 +122,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -142,7 +141,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -162,7 +160,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>

build/VStudio/testing/memfs.vcxproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\version.properties" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,33 +23,33 @@
     <ProjectGuid>{AA7190E8-877F-4827-8CDD-E0D85F83C8C1}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>memfs</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
     <ProjectName>memfs</ProjectName>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -107,7 +108,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
   </ItemDefinitionGroup>
@@ -124,7 +124,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
   </ItemDefinitionGroup>
@@ -143,7 +142,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -164,7 +162,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>

build/VStudio/testing/winfsp-tests.vcxproj

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\version.properties" />
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -22,32 +23,32 @@
     <ProjectGuid>{262DF8CC-E7A8-4460-A22C-683CBA322C32}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>winfsptests</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -106,7 +107,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalDependencies>ntdll.lib;netapi32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
@@ -123,7 +123,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <AdditionalDependencies>ntdll.lib;netapi32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
@@ -142,7 +141,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>ntdll.lib;netapi32.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -163,7 +161,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>ntdll.lib;netapi32.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -194,6 +191,7 @@
     <ClCompile Include="..\..\..\tst\winfsp-tests\hooks.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\info-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\launch-test.c" />
+    <ClCompile Include="..\..\..\tst\winfsp-tests\launcher-ptrans-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\lock-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\memfs-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\mount-test.c" />
@@ -206,8 +204,11 @@
     <ClCompile Include="..\..\..\tst\winfsp-tests\security-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\stream-tests.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\timeout-test.c" />
+    <ClCompile Include="..\..\..\tst\winfsp-tests\uuid5-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\version-test.c" />
+    <ClCompile Include="..\..\..\tst\winfsp-tests\volpath-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\winfsp-tests.c" />
+    <ClCompile Include="..\..\..\tst\winfsp-tests\wsl-test.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\ext\tlib\testsuite.h" />

build/VStudio/testing/winfsp-tests.vcxproj.filters

@@ -97,6 +97,18 @@
     <ClCompile Include="..\..\..\tst\winfsp-tests\ea-test.c">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\tst\winfsp-tests\wsl-test.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\tst\winfsp-tests\launcher-ptrans-test.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\tst\winfsp-tests\volpath-test.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\tst\winfsp-tests\uuid5-test.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\ext\tlib\testsuite.h">

build/VStudio/tools/fsptool.vcxproj

@@ -23,32 +23,32 @@
     <ProjectGuid>{1E997BEC-1642-4A5C-B252-852DA094E11E}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>fsptool</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -108,7 +108,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -127,7 +126,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -149,7 +147,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -171,7 +168,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>

build/VStudio/tools/launchctl.vcxproj

@@ -23,32 +23,32 @@
     <ProjectGuid>{264A5D09-126F-4760-A3F1-4B3B95C925AA}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>launchctl</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -110,7 +110,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -131,7 +130,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -155,7 +153,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
@@ -179,7 +176,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>

build/VStudio/tools/launcher.vcxproj

@@ -23,32 +23,32 @@
     <ProjectGuid>{6CDF9411-B852-4EAC-822D-8F930675F17B}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>launcher</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -110,7 +110,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <AdditionalDependencies>%(AdditionalDependencies);rpcrt4.lib;userenv.lib</AdditionalDependencies>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -132,7 +131,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <AdditionalDependencies>%(AdditionalDependencies);rpcrt4.lib;userenv.lib</AdditionalDependencies>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -157,7 +155,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <AdditionalDependencies>%(AdditionalDependencies);rpcrt4.lib;userenv.lib</AdditionalDependencies>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -182,7 +179,6 @@
       <SubSystem>Console</SubSystem>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
       <AdditionalDependencies>%(AdditionalDependencies);rpcrt4.lib;userenv.lib</AdditionalDependencies>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -190,6 +186,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\src\launcher\launcher.c" />
+    <ClCompile Include="..\..\..\src\launcher\ptrans.c" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\winfsp_dll.vcxproj">

build/VStudio/tools/launcher.vcxproj.filters

@@ -16,6 +16,9 @@
     <ClCompile Include="..\..\..\src\launcher\launcher.c">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\src\launcher\ptrans.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\src\shared\minimal.h">

build/VStudio/version.properties

@@ -13,12 +13,12 @@
 
         <MyProductName>WinFsp</MyProductName>
         <MyDescription>Windows File System Proxy</MyDescription>
-        <MyCompanyName>Navimatics Corporation</MyCompanyName>
+        <MyCompanyName>Navimatics LLC</MyCompanyName>
         <MyCopyright>2015-$([System.DateTime]::Now.ToString(`yyyy`)) Bill Zissimopoulos</MyCopyright>
 
         <MyCanonicalVersion>1.5</MyCanonicalVersion>
 
-        <MyProductVersion>2019.3 B1</MyProductVersion>
+        <MyProductVersion>2019.3 B4</MyProductVersion>
         <MyProductStage>Beta</MyProductStage>
 
         <MyVersion>$(MyCanonicalVersion).$(MyBuildNumber)</MyVersion>
@@ -37,4 +37,17 @@
             <PreprocessorDefinitions>MyProductName=$(MyProductName);MyDescription=$(MyDescription);MyCompanyName=$(MyCompanyName);MyCopyright=$(MyCopyright);MyProductVersion=$(MyProductVersion);MyProductStage=$(MyProductStage);MyVersion=$(MyVersion);MyVersionWithCommas=$(MyVersionWithCommas);MyFullVersion=$(MyFullVersion)</PreprocessorDefinitions>
         </ResourceCompile>
     </ItemDefinitionGroup>
+    <ItemDefinitionGroup Condition="'$(DefaultPlatformToolset)'=='v140'">
+        <Link>
+            <GenerateDebugInformation>true</GenerateDebugInformation>
+        </Link>
+    </ItemDefinitionGroup>
+    <ItemDefinitionGroup Condition="'$(DefaultPlatformToolset)'!='v140'">
+        <Link>
+            <GenerateDebugInformation>DebugFull</GenerateDebugInformation>
+        </Link>
+    </ItemDefinitionGroup>
+    <PropertyGroup>
+        <SpectreMitigation>false</SpectreMitigation>
+    </PropertyGroup>
 </Project>

build/VStudio/winfsp_dll.vcxproj

@@ -35,6 +35,7 @@
     <ClInclude Include="..\..\src\dll\fuse3\library.h" />
     <ClInclude Include="..\..\src\dll\fuse\library.h" />
     <ClInclude Include="..\..\src\dll\library.h" />
+    <ClInclude Include="..\..\src\ku\library.h" />
     <ClInclude Include="..\..\src\shared\minimal.h" />
   </ItemGroup>
   <ItemGroup>
@@ -50,8 +51,8 @@
     <ClCompile Include="..\..\src\dll\fuse\fuse_main.c" />
     <ClCompile Include="..\..\src\dll\fuse\fuse_opt.c" />
     <ClCompile Include="..\..\src\dll\launch.c" />
+    <ClCompile Include="..\..\src\dll\mount.c" />
     <ClCompile Include="..\..\src\dll\np.c" />
-    <ClCompile Include="..\..\src\dll\posix.c" />
     <ClCompile Include="..\..\src\dll\security.c" />
     <ClCompile Include="..\..\src\dll\debug.c" />
     <ClCompile Include="..\..\src\dll\fsctl.c" />
@@ -63,6 +64,7 @@
     <ClCompile Include="..\..\src\dll\service.c" />
     <ClCompile Include="..\..\src\dll\util.c" />
     <ClCompile Include="..\..\src\dll\wksid.c" />
+    <ClCompile Include="..\..\src\ku\posix.c" />
   </ItemGroup>
   <ItemGroup>
     <CustomBuild Include="..\..\src\dll\fuse\fuse.pc.in">
@@ -126,33 +128,33 @@ copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(Platf
     <ProjectGuid>{4A7C0B21-9E10-4C81-92DE-1493EFCF24EB}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>winfspdll</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
     <ProjectName>winfsp.dll</ProjectName>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -216,7 +218,6 @@ copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(Platf
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <GenerateMapFile>true</GenerateMapFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -244,7 +245,6 @@ copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(Platf
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <GenerateMapFile>true</GenerateMapFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -273,7 +273,6 @@ copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(Platf
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
@@ -304,7 +303,6 @@ copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(Platf
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>

build/VStudio/winfsp_dll.vcxproj.filters

@@ -27,6 +27,9 @@
     <Filter Include="Source\fuse3">
       <UniqueIdentifier>{96091a7b-3923-4a74-9491-3ee230c688f9}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Source\ku">
+      <UniqueIdentifier>{613cce77-2428-4f9a-9187-f37e009253c1}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\inc\winfsp\fsctl.h">
@@ -77,6 +80,9 @@
     <ClInclude Include="..\..\src\dll\fuse3\library.h">
       <Filter>Source\fuse3</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\ku\library.h">
+      <Filter>Source\ku</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\dll\library.c">
@@ -124,9 +130,6 @@
     <ClCompile Include="..\..\src\dll\fuse\fuse_main.c">
       <Filter>Source\fuse</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\dll\posix.c">
-      <Filter>Source</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\src\dll\fuse\fuse_intf.c">
       <Filter>Source\fuse</Filter>
     </ClCompile>
@@ -154,6 +157,12 @@
     <ClCompile Include="..\..\src\dll\fuse3\fuse3_compat.c">
       <Filter>Source\fuse3</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\ku\posix.c">
+      <Filter>Source\ku</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\dll\mount.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\src\dll\library.def">

build/VStudio/winfsp_sys.vcxproj

@@ -101,11 +101,11 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\src;..\..\opt\fsext\inc;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions> _X86_=1;i386=1;STD_CALL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalDependencies>wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>cng.lib;wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateMapFile>true</GenerateMapFile>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -114,11 +114,11 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\src;..\..\opt\fsext\inc;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions> _X86_=1;i386=1;STD_CALL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalDependencies>wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>cng.lib;wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateMapFile>true</GenerateMapFile>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -127,11 +127,11 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\src;..\..\opt\fsext\inc;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions> _WIN64;_AMD64_;AMD64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalDependencies>wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>cng.lib;wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateMapFile>true</GenerateMapFile>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -140,11 +140,11 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\src;..\..\opt\fsext\inc;..\..\inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions> _WIN64;_AMD64_;AMD64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalDependencies>wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>cng.lib;wdmsec.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateMapFile>true</GenerateMapFile>
       <ProgramDatabaseFile>$(OutDir)$(TargetFileName).pdb</ProgramDatabaseFile>
       <MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
@@ -155,6 +155,8 @@
     <FilesToPackage Include="$(TargetPath)" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\src\ku\posix.c" />
+    <ClCompile Include="..\..\src\ku\uuid5.c" />
     <ClCompile Include="..\..\src\sys\cleanup.c" />
     <ClCompile Include="..\..\src\sys\close.c" />
     <ClCompile Include="..\..\src\sys\create.c" />
@@ -169,10 +171,12 @@
     <ClCompile Include="..\..\src\sys\fileinfo.c" />
     <ClCompile Include="..\..\src\sys\flush.c" />
     <ClCompile Include="..\..\src\sys\fsctl.c" />
+    <ClCompile Include="..\..\src\sys\fsext.c" />
     <ClCompile Include="..\..\src\sys\iop.c" />
     <ClCompile Include="..\..\src\sys\ioq.c" />
     <ClCompile Include="..\..\src\sys\lockctl.c" />
     <ClCompile Include="..\..\src\sys\meta.c" />
+    <ClCompile Include="..\..\src\sys\mountdev.c" />
     <ClCompile Include="..\..\src\sys\mup.c" />
     <ClCompile Include="..\..\src\sys\name.c" />
     <ClCompile Include="..\..\src\sys\psbuffer.c" />
@@ -188,6 +192,8 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\inc\winfsp\fsctl.h" />
+    <ClInclude Include="..\..\opt\fsext\inc\winfsp\fsext.h" />
+    <ClInclude Include="..\..\src\ku\library.h" />
     <ClInclude Include="..\..\src\sys\driver.h" />
   </ItemGroup>
   <ItemGroup>
@@ -212,7 +218,7 @@ for /f "delims=" %%l in (%(FullPath)) do (
     echo !line! &gt;&gt;$(OutDir)driver-$(PlatformTarget).inf
 )
 
-stampinf -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
+stampinf -d * -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
       <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</LinkObjects>
       <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">set DriverFile=$(TargetFileName)
 set Provider="$(MyCompanyName)"
@@ -225,7 +231,7 @@ for /f "delims=" %%l in (%(FullPath)) do (
     echo !line! &gt;&gt;$(OutDir)driver-$(PlatformTarget).inf
 )
 
-stampinf -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
+stampinf -d * -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
       <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkObjects>
       <Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">set DriverFile=$(TargetFileName)
 set Provider="$(MyCompanyName)"
@@ -238,7 +244,7 @@ for /f "delims=" %%l in (%(FullPath)) do (
     echo !line! &gt;&gt;$(OutDir)driver-$(PlatformTarget).inf
 )
 
-stampinf -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
+stampinf -d * -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
       <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</LinkObjects>
       <Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">set DriverFile=$(TargetFileName)
 set Provider="$(MyCompanyName)"
@@ -251,7 +257,7 @@ for /f "delims=" %%l in (%(FullPath)) do (
     echo !line! &gt;&gt;$(OutDir)driver-$(PlatformTarget).inf
 )
 
-stampinf -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
+stampinf -d * -v $(MyVersion) -f $(OutDir)driver-$(PlatformTarget).inf</Command>
       <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkObjects>
       <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Writing driver-$(PlatformTarget).inf</Message>
       <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(OutDir)driver-$(PlatformTarget).inf</Outputs>

build/VStudio/winfsp_sys.vcxproj.filters

@@ -12,6 +12,9 @@
     <Filter Include="Include\winfsp">
       <UniqueIdentifier>{904f0df1-2fb8-4f84-aa46-fa929488c39a}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Source\ku">
+      <UniqueIdentifier>{235076b8-290c-4dec-b005-71d9b8e8cba7}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\sys\driver.c">
@@ -104,6 +107,18 @@
     <ClCompile Include="..\..\src\sys\mup.c">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\sys\fsext.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\ku\posix.c">
+      <Filter>Source\ku</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\ku\uuid5.c">
+      <Filter>Source\ku</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\sys\mountdev.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\src\sys\driver.h">
@@ -112,6 +127,12 @@
     <ClInclude Include="..\..\inc\winfsp\fsctl.h">
       <Filter>Include\winfsp</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\opt\fsext\inc\winfsp\fsext.h">
+      <Filter>Include\winfsp</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\ku\library.h">
+      <Filter>Source\ku</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="..\..\src\sys\version.rc">

doc/Frequently-Asked-Questions.asciidoc

@@ -18,10 +18,6 @@ Disconnecting (unmapping) a network drive does not work.::
 Case-sensitive file systems do not work properly when mounted as a directory.::
 
     This is fixed as of WinFsp 2018.2 B3.
-+
-Windows and WinFsp support case-sensitive file systems. These file systems work properly when mounted as a drive. Unfortunately when a file system is mounted as a directory over NTFS, Windows expects it to be case-insensitive and will UPPERCASE many of the file names sent to the file system.
-+
-This is an unfortunate but well understood Windows limitation. Case-sensitive file systems should only be mounted as drives.
 
 
 Why is the DLL not installed in the Windows system directories?::
@@ -68,5 +64,10 @@ With this in mind here are the reasons for the current WinFsp-FUSE behavior:
 WinFsp-FUSE does not have the ability to support multiple file systems from within the same process. Why?::
 
     This is supported as of WinFsp 2018.2 B2.
+
+
+I have problems getting permissions to work properly in a WinFsp-FUSE file system. Can you help?::
+
+    The WinFsp-FUSE layer includes a built-in command line option that can help: `-o uid=-1`. This instructs the WinFsp-FUSE layer to present all file system files as if they are owned by the user that launched the file system.
 +
-The core WinFsp layer always supported multiple file systems in the same process either simultaneously or one after another. However this was not the case with WinFsp-FUSE (i.e. the FUSE layer of WinFsp) prior to version 2018.2 B2. This limitation has been rectified as of WinFsp 2018.2 B2.
+Alternatives include `-o uid=-1,gid=-1`, which presents files as owned by the user *and* group that launched the file system and `-o uid=-1,gid=11`, which presents files as owned by the user that launched the file system and the group "Authenticated Users". (The `fsptool` utility in the `bin` subdirectory of the WinFsp installation directory can be used to convert Windows accounts/SID's to UID's and vice versa.)

doc/Known-File-Systems.asciidoc

@@ -5,6 +5,7 @@ This document contains a list of known file systems and file system libraries th
 == File Systems
 
 - https://github.com/vgough/encfs[EncFS] - an Encrypted Filesystem for FUSE
+- https://github.com/lowleveldesign/fsmemfs[fsmemfs] - Memory File System written in F#
 - https://github.com/ihaveamac/fuse-3ds[fuse-3ds] - FUSE Filesystem Python scripts for Nintendo 3DS files
 - https://github.com/FrKaram/KS2.Drive[KS2.Drive] - Mount a webDAV/AOS server as a local drive
 - https://github.com/billziss-gh/nfs-win[nfs-win] - NFS for Windows
@@ -13,6 +14,7 @@ This document contains a list of known file systems and file system libraries th
 - https://github.com/billziss-gh/redditfs[redditfs] - ls -l /r/programming
 - https://github.com/netheril96/securefs[securefs] - Filesystem in userspace (FUSE) with transparent authenticated encryption
 - https://github.com/billziss-gh/sshfs-win[sshfs-win] - SSHFS for Windows
+- https://github.com/UtrechtUniversity/YodaDrive[YodaDrive] - Mount a Yoda drive as a local drive
 
 == File System Libraries
 
@@ -20,3 +22,4 @@ This document contains a list of known file systems and file system libraries th
 - https://github.com/DuroSoft/fuse-bindings[Nodejs: fuse-bindings] - Fully maintained FUSE bindings for Node that aims to cover the entire FUSE api
 - https://github.com/SerCeMan/jnr-fuse[Java: jnr-fuse] - FUSE implementation in Java using Java Native Runtime (JNR)
 - https://github.com/billziss-gh/fusepy[Python: fusepy] - Simple ctypes bindings for FUSE
+- https://github.com/Scille/winfspy[Python: winfspy] - WinFSP binding for Python

inc/winfsp/fsctl.h

@@ -54,6 +54,8 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
 #define FSP_FSCTL_DECLSPEC_ALIGN        __declspec(align(FSP_FSCTL_DEFAULT_ALIGNMENT))
 
 /* fsctl device codes */
+#define FSP_FSCTL_MOUNTDEV              \
+    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'M', METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define FSP_FSCTL_VOLUME_NAME           \
     CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'N', METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define FSP_FSCTL_VOLUME_LIST           \
@@ -65,6 +67,10 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
 #define FSP_FSCTL_STOP                  \
     CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'S', METHOD_BUFFERED, FILE_ANY_ACCESS)
 
+/* fsctl internal device codes (usable only in-kernel) */
+#define FSP_FSCTL_TRANSACT_INTERNAL     \
+    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'I', METHOD_NEITHER, FILE_ANY_ACCESS)
+
 #define FSP_FSCTL_VOLUME_PARAMS_PREFIX  "\\VolumeParams="
 
 #define FSP_FSCTL_VOLUME_NAME_SIZE      (64 * sizeof(WCHAR))
@@ -83,14 +89,14 @@ FSP_FSCTL_STATIC_ASSERT(FSP_FSCTL_VOLUME_NAME_SIZEMAX <= 260 * sizeof(WCHAR),
 #define FSP_FSCTL_TRANSACT_BATCH_BUFFER_SIZEMIN (64 * 1024)
 #define FSP_FSCTL_TRANSACT_BUFFER_SIZEMIN       FSP_FSCTL_TRANSACT_REQ_SIZEMAX
 
-#define FSP_FSCTL_TRANSACT_REQ_TOKEN_HANDLE(T)  ((HANDLE)((T) & 0xffffffff))
+#define FSP_FSCTL_TRANSACT_REQ_TOKEN_HANDLE(T)  ((HANDLE)((UINT_PTR)((T) & 0xffffffff)))
 #define FSP_FSCTL_TRANSACT_REQ_TOKEN_PID(T)     ((UINT32)(((T) >> 32) & 0xffffffff))
 
 #define FSP_FSCTL_DEVICECONTROL_SIZEMAX (4 * 1024)  /* must be < FSP_FSCTL_TRANSACT_{REQ,RSP}_SIZEMAX */
 
 /* marshalling */
 #pragma warning(push)
-#pragma warning(disable:4200)           /* zero-sized array in struct/union */
+#pragma warning(disable:4200 4201)      /* zero-sized array in struct/union; nameless struct/union */
 enum
 {
     FspFsctlTransactReservedKind = 0,
@@ -121,7 +127,7 @@ enum
 {
     FspFsctlTransactTimeoutMinimum = 1000,
     FspFsctlTransactTimeoutMaximum = 10000,
-    FspFsctlTransactTimeoutDefault = 1000,
+    FspFsctlTransactTimeoutDefault = 1000,  /* DEPRECATED: default is unspecified */
     FspFsctlIrpTimeoutMinimum = 60000,
     FspFsctlIrpTimeoutMaximum = 600000,
     FspFsctlIrpTimeoutDefault = 300000,
@@ -139,7 +145,7 @@ enum
     UINT64 VolumeCreationTime;\
     UINT32 VolumeSerialNumber;\
     /* I/O timeouts, capacity, etc. */\
-    UINT32 TransactTimeout;             /* FSP_FSCTL_TRANSACT timeout (millis; 1 sec - 10 sec) */\
+    UINT32 TransactTimeout;             /* DEPRECATED: (millis; 1 sec - 10 sec) */\
     UINT32 IrpTimeout;                  /* pending IRP timeout (millis; 1 min - 10 min) */\
     UINT32 IrpCapacity;                 /* maximum number of pending IRP's (100 - 1000)*/\
     UINT32 FileInfoTimeout;             /* FileInfo/Security/VolumeInfo timeout (millis) */\
@@ -168,7 +174,9 @@ enum
     /* additional kernel-mode flags */\
     UINT32 AllowOpenInKernelMode:1;         /* allow kernel mode to open files when possible */\
     UINT32 CasePreservedExtendedAttributes:1;   /* preserve case of EA (default is UPPERCASE) */\
-    UINT32 KmReservedFlags:6;\
+    UINT32 WslFeatures:1;                   /* support features required for WSLinux */\
+    UINT32 DirectoryMarkerAsNextOffset:1;   /* directory marker is next offset instead of last name */\
+    UINT32 KmReservedFlags:4;\
     WCHAR Prefix[FSP_FSCTL_VOLUME_PREFIX_SIZE / sizeof(WCHAR)]; /* UNC prefix (\Server\Share) */\
     WCHAR FileSystemName[FSP_FSCTL_VOLUME_FSNAME_SIZE / sizeof(WCHAR)];
 #define FSP_FSCTL_VOLUME_PARAMS_V1_FIELD_DEFN\
@@ -184,7 +192,8 @@ enum
     UINT32 SecurityTimeout;             /* security info timeout (millis); overrides FileInfoTimeout */\
     UINT32 StreamInfoTimeout;           /* stream info timeout (millis); overrides FileInfoTimeout */\
     UINT32 EaTimeout;                   /* EA timeout (millis); overrides FileInfoTimeout */\
-    UINT32 Reserved32[2];\
+    UINT32 FsextControlCode;\
+    UINT32 Reserved32[1];\
     UINT64 Reserved64[2];
 typedef struct
 {
@@ -234,8 +243,12 @@ typedef struct
 {
     UINT16 Size;
     FSP_FSCTL_FILE_INFO FileInfo;
+    union
+    {
+        UINT64 NextOffset;
         UINT8 Padding[24];
             /* make struct as big as FILE_ID_BOTH_DIR_INFORMATION; allows for in-place copying */
+    } DUMMYUNIONNAME;
     WCHAR FileNameBuf[];
 } FSP_FSCTL_DIR_INFO;
 FSP_FSCTL_STATIC_ASSERT(104 == sizeof(FSP_FSCTL_DIR_INFO),
@@ -277,7 +290,7 @@ typedef struct
             UINT32 DesiredAccess;       /* FILE_{READ_DATA,WRITE_DATA,etc.} */
             UINT32 GrantedAccess;       /* FILE_{READ_DATA,WRITE_DATA,etc.} */
             UINT32 ShareAccess;         /* FILE_SHARE_{READ,WRITE,DELETE} */
-            FSP_FSCTL_TRANSACT_BUF Ea;  /* extended attributes buffer */
+            FSP_FSCTL_TRANSACT_BUF Ea;  /* extended attributes or reparse point buffer */
             UINT32 UserMode:1;          /* request originated in user mode */
             UINT32 HasTraversePrivilege:1;  /* requestor has TOKEN_HAS_TRAVERSE_PRIVILEGE */
             UINT32 HasBackupPrivilege:1;    /* requestor has TOKEN_HAS_BACKUP_PRIVILEGE */
@@ -286,6 +299,7 @@ typedef struct
             UINT32 CaseSensitive:1;         /* FileName comparisons should be case-sensitive */
             UINT32 HasTrailingBackslash:1;  /* FileName had trailing backslash */
             UINT32 AcceptsSecurityDescriptor:1;
+            UINT32 EaIsReparsePoint:1;      /* Ea buffer is reparse point */
             UINT32 ReservedFlags:24;
             UINT16 NamedStream;             /* request targets named stream; colon offset in FileName */
         } Create;
@@ -586,11 +600,13 @@ static inline FSP_FSCTL_TRANSACT_RSP *FspFsctlTransactConsumeResponse(
     return NextResponse <= ResponseBufEnd ? (FSP_FSCTL_TRANSACT_RSP *)NextResponse : 0;
 }
 
-#if !defined(WINFSP_SYS_INTERNAL)
+#if !defined(_KERNEL_MODE)
 FSP_API NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath,
     const FSP_FSCTL_VOLUME_PARAMS *VolumeParams,
     PWCHAR VolumeNameBuf, SIZE_T VolumeNameSize,
     PHANDLE PVolumeHandle);
+FSP_API NTSTATUS FspFsctlMakeMountdev(HANDLE VolumeHandle,
+    BOOLEAN Persistent, GUID *UniqueId);
 FSP_API NTSTATUS FspFsctlTransact(HANDLE VolumeHandle,
     PVOID ResponseBuf, SIZE_T ResponseBufSize,
     PVOID RequestBuf, SIZE_T *PRequestBufSize,
@@ -599,6 +615,20 @@ FSP_API NTSTATUS FspFsctlStop(HANDLE VolumeHandle);
 FSP_API NTSTATUS FspFsctlGetVolumeList(PWSTR DevicePath,
     PWCHAR VolumeListBuf, PSIZE_T PVolumeListSize);
 FSP_API NTSTATUS FspFsctlPreflight(PWSTR DevicePath);
+
+typedef struct
+{
+    /* in */
+    HANDLE VolumeHandle;                /* volume handle returned by FspFsctlCreateVolume */
+    PWSTR VolumeName;                   /* volume name returned by FspFsctlCreateVolume */
+    PSECURITY_DESCRIPTOR Security;      /* optional: security descriptor for directories */
+    UINT64 Reserved;                    /* reserved for future use */
+    /* in/out */
+    PWSTR MountPoint;                   /* FspMountSet sets drive in buffer when passed "*:" */
+    HANDLE MountHandle;                 /* FspMountSet sets, FspMountRemove uses */
+} FSP_MOUNT_DESC;
+FSP_API NTSTATUS FspMountSet(FSP_MOUNT_DESC *Desc);
+FSP_API NTSTATUS FspMountRemove(FSP_MOUNT_DESC *Desc);
 #endif
 
 #ifdef __cplusplus

inc/winfsp/winfsp.h

@@ -912,7 +912,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
     /**
      * Create new file or directory.
      *
-     * This function works like Create, except that it also accepts EA (extended attributes).
+     * This function works like Create, except that it also accepts an extra buffer that
+     * may contain extended attributes or a reparse point.
      *
      * NOTE: If both Create and CreateEx are defined, CreateEx takes precedence.
      *
@@ -941,10 +942,12 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
      *     Windows GetSecurityDescriptorLength API. Will be NULL for named streams.
      * @param AllocationSize
      *     Allocation size for the newly created file.
-     * @param Ea
-     *     Extended attributes buffer.
-     * @param EaLength
-     *     Extended attributes buffer length.
+     * @param ExtraBuffer
+     *     Extended attributes or reparse point buffer.
+     * @param ExtraLength
+     *     Extended attributes or reparse point buffer length.
+     * @param ExtraBufferIsReparsePoint
+     *     FALSE: extra buffer is extended attributes; TRUE: extra buffer is reparse point.
      * @param PFileContext [out]
      *     Pointer that will receive the file context on successful return from this call.
      * @param FileInfo [out]
@@ -956,7 +959,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
     NTSTATUS (*CreateEx)(FSP_FILE_SYSTEM *FileSystem,
         PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
         UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
-        PFILE_FULL_EA_INFORMATION Ea, ULONG EaLength,
+        PVOID ExtraBuffer, ULONG ExtraLength, BOOLEAN ExtraBufferIsReparsePoint,
         PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo);
     /**
      * Overwrite a file.

opt/fsext/inc/winfsp/fsext.h

@@ -0,0 +1,96 @@
+/**
+ * @file winfsp/fsext.h
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#ifndef WINFSP_FSEXT_H_INCLUDED
+#define WINFSP_FSEXT_H_INCLUDED
+
+#if !defined(_KERNEL_MODE)
+#error This file can only be included when compiling for kernel mode.
+#endif
+
+#include <winfsp/fsctl.h>
+
+#if defined(WINFSP_SYS_INTERNAL)
+#define FSP_DDI                         __declspec(dllexport)
+#else
+#define FSP_DDI                         __declspec(dllimport)
+#endif
+#if !defined(FSP_DDI_DEF)
+#define FSP_DDI_DEF(RetType, Name, ...) FSP_DDI RetType NTAPI Name ( __VA_ARGS__ );
+#endif
+
+typedef struct
+{
+    UINT32 Version;
+    /* in */
+    UINT32 DeviceTransactCode;
+    UINT32 DeviceExtensionSize;
+    NTSTATUS (*DeviceInit)(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_PARAMS *VolumeParams);
+    VOID (*DeviceFini)(PDEVICE_OBJECT DeviceObject);
+    VOID (*DeviceExpirationRoutine)(PDEVICE_OBJECT DeviceObject, UINT64 ExpirationTime);
+    NTSTATUS (*DeviceTransact)(PDEVICE_OBJECT DeviceObject, PIRP Irp);
+    /* out */
+    UINT32 DeviceExtensionOffset;
+} FSP_FSEXT_PROVIDER;
+
+FSP_DDI_DEF(NTSTATUS, FspFsextProviderRegister,
+    FSP_FSEXT_PROVIDER *Provider)
+FSP_DDI_DEF(NTSTATUS, FspFsextProviderTransact,
+    PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    FSP_FSCTL_TRANSACT_RSP *Response, FSP_FSCTL_TRANSACT_REQ **PRequest)
+
+FSP_DDI_DEF(NTSTATUS, FspPosixMapUidToSid,
+    UINT32 Uid,
+    PSID *PSid)
+FSP_DDI_DEF(NTSTATUS, FspPosixMapSidToUid,
+    PSID Sid,
+    PUINT32 PUid)
+FSP_DDI_DEF(VOID, FspDeleteSid,
+    PSID Sid,
+    NTSTATUS (*CreateFunc)())
+FSP_DDI_DEF(NTSTATUS, FspPosixMapPermissionsToSecurityDescriptor,
+    UINT32 Uid,
+    UINT32 Gid,
+    UINT32 Mode,
+    PSECURITY_DESCRIPTOR *PSecurityDescriptor)
+FSP_DDI_DEF(NTSTATUS, FspPosixMapSecurityDescriptorToPermissions,
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PUINT32 PUid,
+    PUINT32 PGid,
+    PUINT32 PMode)
+FSP_DDI_DEF(NTSTATUS, FspPosixMapWindowsToPosixPathEx,
+    PWSTR WindowsPath,
+    char **PPosixPath,
+    BOOLEAN Translate)
+FSP_DDI_DEF(NTSTATUS, FspPosixMapPosixToWindowsPathEx,
+    const char *PosixPath,
+    PWSTR *PWindowsPath,
+    BOOLEAN Translate)
+FSP_DDI_DEF(VOID, FspPosixDeletePath,
+    void *Path)
+FSP_DDI_DEF(VOID, FspPosixEncodeWindowsPath,
+    PWSTR WindowsPath,
+    ULONG Size)
+FSP_DDI_DEF(VOID, FspPosixDecodeWindowsPath,
+    PWSTR WindowsPath,
+    ULONG Size)
+
+#endif

opt/fsext/lib/winfsp.impdef

@@ -0,0 +1,6 @@
+// tools\impdef.bat lib\winfsp.impdef lib\winfsp-x64.lib
+// tools\impdef.bat lib\winfsp.impdef lib\winfsp-x86.lib
+
+#define FSP_DDI_DEF(RetType, Name, ...) __declspec(dllexport) RetType NTAPI Name ( __VA_ARGS__ ) {}
+#include <ntifs.h>
+#include <winfsp/fsext.h>

src/dll/fs.c

@@ -24,41 +24,19 @@
 enum
 {
     FspFileSystemDispatcherThreadCountMin = 2,
+    FspFileSystemDispatcherDefaultThreadCountMin = 4,
+    FspFileSystemDispatcherDefaultThreadCountMax = 16,
 };
 
 static FSP_FILE_SYSTEM_INTERFACE FspFileSystemNullInterface;
 
 static INIT_ONCE FspFileSystemInitOnce = INIT_ONCE_STATIC_INIT;
 static DWORD FspFileSystemTlsKey = TLS_OUT_OF_INDEXES;
-static NTSTATUS (NTAPI *FspNtOpenSymbolicLinkObject)(
-    PHANDLE LinkHandle, ACCESS_MASK DesiredAccess, POBJECT_ATTRIBUTES ObjectAttributes);
-static NTSTATUS (NTAPI *FspNtMakeTemporaryObject)(
-    HANDLE Handle);
-static NTSTATUS (NTAPI *FspNtClose)(
-    HANDLE Handle);
 
 static BOOL WINAPI FspFileSystemInitialize(
     PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
 {
-    HANDLE Handle;
-
     FspFileSystemTlsKey = TlsAlloc();
-
-    Handle = GetModuleHandleW(L"ntdll.dll");
-    if (0 != Handle)
-    {
-        FspNtOpenSymbolicLinkObject = (PVOID)GetProcAddress(Handle, "NtOpenSymbolicLinkObject");
-        FspNtMakeTemporaryObject = (PVOID)GetProcAddress(Handle, "NtMakeTemporaryObject");
-        FspNtClose = (PVOID)GetProcAddress(Handle, "NtClose");
-
-        if (0 == FspNtOpenSymbolicLinkObject || 0 == FspNtMakeTemporaryObject || 0 == FspNtClose)
-        {
-            FspNtOpenSymbolicLinkObject = 0;
-            FspNtMakeTemporaryObject = 0;
-            FspNtClose = 0;
-        }
-    }
-
     return TRUE;
 }
 
@@ -91,7 +69,9 @@ FSP_API NTSTATUS FspFileSystemPreflight(PWSTR DevicePath,
         Result = STATUS_SUCCESS;
     else
     {
-        if (FspPathIsDrive(MountPoint))
+        if (FspPathIsMountmgrMountPoint(MountPoint))
+            Result = STATUS_SUCCESS; /* cannot check with the mount manager, assume success */
+        else if (FspPathIsDrive(MountPoint))
             Result = QueryDosDeviceW(MountPoint, TargetPath, MAX_PATH) ?
                 STATUS_OBJECT_NAME_COLLISION : STATUS_SUCCESS;
         else
@@ -194,205 +174,6 @@ FSP_API VOID FspFileSystemDelete(FSP_FILE_SYSTEM *FileSystem)
     MemFree(FileSystem);
 }
 
-static NTSTATUS FspFileSystemLauncherDefineDosDevice(
-    WCHAR Sign, PWSTR MountPoint, PWSTR VolumeName)
-{
-    if (2 != lstrlenW(MountPoint) ||
-        FSP_FSCTL_VOLUME_NAME_SIZEMAX / sizeof(WCHAR) <= lstrlenW(VolumeName))
-        return STATUS_INVALID_PARAMETER;
-
-    WCHAR Argv0[4];
-    PWSTR Argv[2];
-    NTSTATUS Result;
-    ULONG ErrorCode;
-
-    Argv0[0] = Sign;
-    Argv0[1] = MountPoint[0];
-    Argv0[2] = MountPoint[1];
-    Argv0[3] = L'\0';
-
-    Argv[0] = Argv0;
-    Argv[1] = VolumeName;
-
-    Result = FspLaunchCallLauncherPipe(FspLaunchCmdDefineDosDevice, 2, Argv, 0, 0, 0, &ErrorCode);
-    return !NT_SUCCESS(Result) ? Result : FspNtStatusFromWin32(ErrorCode);
-}
-
-static NTSTATUS FspFileSystemSetMountPoint_Drive(PWSTR MountPoint, PWSTR VolumeName,
-    PHANDLE PMountHandle)
-{
-    NTSTATUS Result;
-    BOOLEAN IsLocalSystem, IsServiceContext;
-
-    *PMountHandle = 0;
-
-    Result = FspServiceContextCheck(0, &IsLocalSystem);
-    IsServiceContext = NT_SUCCESS(Result) && !IsLocalSystem;
-    if (IsServiceContext)
-    {
-        /*
-         * If the current process is in the service context but not LocalSystem,
-         * ask the launcher to DefineDosDevice for us. This is because the launcher
-         * runs in the LocalSystem context and can create global drives.
-         *
-         * In this case the launcher will also add DELETE access to the drive symlink
-         * for us, so that we can make it temporary below.
-         */
-        Result = FspFileSystemLauncherDefineDosDevice(L'+', MountPoint, VolumeName);
-        if (!NT_SUCCESS(Result))
-            return Result;
-    }
-    else
-    {
-        if (!DefineDosDeviceW(DDD_RAW_TARGET_PATH, MountPoint, VolumeName))
-            return FspNtStatusFromWin32(GetLastError());
-    }
-
-    if (0 != FspNtOpenSymbolicLinkObject)
-    {
-        WCHAR SymlinkBuf[6];
-        UNICODE_STRING Symlink;
-        OBJECT_ATTRIBUTES Obja;
-
-        memcpy(SymlinkBuf, L"\\??\\X:", sizeof SymlinkBuf);
-        SymlinkBuf[4] = MountPoint[0];
-        Symlink.Length = Symlink.MaximumLength = sizeof SymlinkBuf;
-        Symlink.Buffer = SymlinkBuf;
-
-        memset(&Obja, 0, sizeof Obja);
-        Obja.Length = sizeof Obja;
-        Obja.ObjectName = &Symlink;
-        Obja.Attributes = OBJ_CASE_INSENSITIVE;
-
-        Result = FspNtOpenSymbolicLinkObject(PMountHandle, DELETE, &Obja);
-        if (NT_SUCCESS(Result))
-        {
-            Result = FspNtMakeTemporaryObject(*PMountHandle);
-            if (!NT_SUCCESS(Result))
-            {
-                FspNtClose(*PMountHandle);
-                *PMountHandle = 0;
-            }
-        }
-    }
-
-    /* HACK:
-     *
-     * Handles do not use the low 2 bits (unless they are console handles).
-     * Abuse this fact to remember that we are running in the service context.
-     */
-    *PMountHandle = (HANDLE)(UINT_PTR)((DWORD)(UINT_PTR)*PMountHandle | IsServiceContext);
-
-    return STATUS_SUCCESS;
-}
-
-static NTSTATUS FspFileSystemSetMountPoint_Directory(PWSTR MountPoint, PWSTR VolumeName,
-    PSECURITY_DESCRIPTOR SecurityDescriptor, PHANDLE PMountHandle)
-{
-    NTSTATUS Result;
-    SECURITY_ATTRIBUTES SecurityAttributes;
-    HANDLE MountHandle = INVALID_HANDLE_VALUE;
-    DWORD Backslashes, Bytes;
-    USHORT VolumeNameLength, BackslashLength, ReparseDataLength;
-    PREPARSE_DATA_BUFFER ReparseData = 0;
-    PWSTR P, PathBuffer;
-
-    *PMountHandle = 0;
-
-    /*
-     * Windows does not allow mount points (junctions) to point to network file systems.
-     *
-     * Count how many backslashes our VolumeName has. If it is 3 or more this is a network
-     * file system. Preemptively return STATUS_NETWORK_ACCESS_DENIED.
-     */
-    for (P = VolumeName, Backslashes = 0; *P; P++)
-        if (L'\\' == *P)
-            if (3 == ++Backslashes)
-            {
-                Result = STATUS_NETWORK_ACCESS_DENIED;
-                goto exit;
-            }
-
-    memset(&SecurityAttributes, 0, sizeof SecurityAttributes);
-    SecurityAttributes.nLength = sizeof SecurityAttributes;
-    SecurityAttributes.lpSecurityDescriptor = SecurityDescriptor;
-
-    MountHandle = CreateFileW(MountPoint,
-        FILE_WRITE_ATTRIBUTES,
-        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
-        &SecurityAttributes,
-        CREATE_NEW,
-        FILE_ATTRIBUTE_DIRECTORY |
-            FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_DELETE_ON_CLOSE,
-        0);
-    if (INVALID_HANDLE_VALUE == MountHandle)
-    {
-        Result = FspNtStatusFromWin32(GetLastError());
-        goto exit;
-    }
-
-    VolumeNameLength = (USHORT)lstrlenW(VolumeName);
-    BackslashLength = 0 == VolumeNameLength || L'\\' != VolumeName[VolumeNameLength - 1];
-    VolumeNameLength *= sizeof(WCHAR);
-    BackslashLength *= sizeof(WCHAR);
-
-    ReparseDataLength = (USHORT)(
-        FIELD_OFFSET(REPARSE_DATA_BUFFER, MountPointReparseBuffer.PathBuffer) -
-        FIELD_OFFSET(REPARSE_DATA_BUFFER, MountPointReparseBuffer)) +
-        2 * (VolumeNameLength + BackslashLength + sizeof(WCHAR));
-    ReparseData = MemAlloc(REPARSE_DATA_BUFFER_HEADER_SIZE + ReparseDataLength);
-    if (0 == ReparseData)
-    {
-        Result = STATUS_INSUFFICIENT_RESOURCES;
-        goto exit;
-    }
-
-    ReparseData->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
-    ReparseData->ReparseDataLength = ReparseDataLength;
-    ReparseData->Reserved = 0;
-    ReparseData->MountPointReparseBuffer.SubstituteNameOffset = 0;
-    ReparseData->MountPointReparseBuffer.SubstituteNameLength =
-        VolumeNameLength + BackslashLength;
-    ReparseData->MountPointReparseBuffer.PrintNameOffset =
-        ReparseData->MountPointReparseBuffer.SubstituteNameLength + sizeof(WCHAR);
-    ReparseData->MountPointReparseBuffer.PrintNameLength =
-        VolumeNameLength + BackslashLength;
-
-    PathBuffer = ReparseData->MountPointReparseBuffer.PathBuffer;
-    memcpy(PathBuffer, VolumeName, VolumeNameLength);
-    if (BackslashLength)
-        PathBuffer[VolumeNameLength / sizeof(WCHAR)] = L'\\';
-    PathBuffer[(VolumeNameLength + BackslashLength) / sizeof(WCHAR)] = L'\0';
-
-    PathBuffer = ReparseData->MountPointReparseBuffer.PathBuffer +
-        (ReparseData->MountPointReparseBuffer.PrintNameOffset) / sizeof(WCHAR);
-    memcpy(PathBuffer, VolumeName, VolumeNameLength);
-    if (BackslashLength)
-        PathBuffer[VolumeNameLength / sizeof(WCHAR)] = L'\\';
-    PathBuffer[(VolumeNameLength + BackslashLength) / sizeof(WCHAR)] = L'\0';
-
-    if (!DeviceIoControl(MountHandle, FSCTL_SET_REPARSE_POINT,
-        ReparseData, REPARSE_DATA_BUFFER_HEADER_SIZE + ReparseData->ReparseDataLength,
-        0, 0,
-        &Bytes, 0))
-    {
-        Result = FspNtStatusFromWin32(GetLastError());
-        goto exit;
-    }
-
-    *PMountHandle = MountHandle;
-
-    Result = STATUS_SUCCESS;
-
-exit:
-    if (!NT_SUCCESS(Result) && INVALID_HANDLE_VALUE != MountHandle)
-        CloseHandle(MountHandle);
-
-    MemFree(ReparseData);
-
-    return Result;
-}
-
 FSP_API NTSTATUS FspFileSystemSetMountPoint(FSP_FILE_SYSTEM *FileSystem, PWSTR MountPoint)
 {
     return FspFileSystemSetMountPointEx(FileSystem, MountPoint, 0);
@@ -404,105 +185,55 @@ FSP_API NTSTATUS FspFileSystemSetMountPointEx(FSP_FILE_SYSTEM *FileSystem, PWSTR
     if (0 != FileSystem->MountPoint)
         return STATUS_INVALID_PARAMETER;
 
+    FSP_MOUNT_DESC Desc;
+    int Size;
     NTSTATUS Result;
-    HANDLE MountHandle = 0;
+
+    memset(&Desc, 0, sizeof Desc);
+    Desc.VolumeHandle = FileSystem->VolumeHandle;
+    Desc.VolumeName = FileSystem->VolumeName;
+    Desc.Security = SecurityDescriptor;
 
     if (0 == MountPoint)
-    {
-        DWORD Drives;
-        WCHAR Drive;
+        MountPoint = L"*:";
 
-        MountPoint = MemAlloc(3 * sizeof(WCHAR));
-        if (0 == MountPoint)
-            return STATUS_INSUFFICIENT_RESOURCES;
-        MountPoint[1] = L':';
-        MountPoint[2] = L'\0';
-
-        Drives = GetLogicalDrives();
-        if (0 != Drives)
+    Size = (lstrlenW(MountPoint) + 1) * sizeof(WCHAR);
+    Desc.MountPoint = MemAlloc(Size);
+    if (0 == Desc.MountPoint)
     {
-            for (Drive = 'Z'; 'D' <= Drive; Drive--)
-                if (0 == (Drives & (1 << (Drive - 'A'))))
-                {
-                    MountPoint[0] = Drive;
-                    Result = FspFileSystemSetMountPoint_Drive(MountPoint, FileSystem->VolumeName,
-                        &MountHandle);
-                    if (NT_SUCCESS(Result))
+        Result = STATUS_INSUFFICIENT_RESOURCES;
         goto exit;
     }
-            Result = STATUS_NO_SUCH_DEVICE;
-        }
-        else
-            Result = FspNtStatusFromWin32(GetLastError());
-    }
-    else
-    {
-        PWSTR P;
-        ULONG L;
+    memcpy(Desc.MountPoint, MountPoint, Size);
 
-        L = (ULONG)((lstrlenW(MountPoint) + 1) * sizeof(WCHAR));
-
-        P = MemAlloc(L);
-        if (0 == P)
-            return STATUS_INSUFFICIENT_RESOURCES;
-        memcpy(P, MountPoint, L);
-        MountPoint = P;
-
-        if (FspPathIsDrive(MountPoint))
-            Result = FspFileSystemSetMountPoint_Drive(MountPoint, FileSystem->VolumeName,
-                &MountHandle);
-        else
-            Result = FspFileSystemSetMountPoint_Directory(MountPoint, FileSystem->VolumeName,
-                SecurityDescriptor, &MountHandle);
-    }
+    Result = FspMountSet(&Desc);
 
 exit:
     if (NT_SUCCESS(Result))
     {
-        FileSystem->MountPoint = MountPoint;
-        FileSystem->MountHandle = MountHandle;
+        FileSystem->MountPoint = Desc.MountPoint;
+        FileSystem->MountHandle = Desc.MountHandle;
     }
     else
-        MemFree(MountPoint);
+        MemFree(Desc.MountPoint);
 
     return Result;
 }
 
-static VOID FspFileSystemRemoveMountPoint_Drive(PWSTR MountPoint, PWSTR VolumeName, HANDLE MountHandle)
-{
-    BOOLEAN IsServiceContext = 0 != ((DWORD)(UINT_PTR)MountHandle & 1);
-    MountHandle = (HANDLE)(UINT_PTR)((DWORD)(UINT_PTR)MountHandle & ~1);
-    if (IsServiceContext)
-        /*
-         * If the current process is in the service context but not LocalSystem,
-         * ask the launcher to DefineDosDevice for us. This is because the launcher
-         * runs in the LocalSystem context and can remove global drives.
-         */
-        FspFileSystemLauncherDefineDosDevice(L'-', MountPoint, VolumeName);
-    else
-        DefineDosDeviceW(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION | DDD_EXACT_MATCH_ON_REMOVE,
-            MountPoint, VolumeName);
-
-    if (0 != MountHandle)
-        FspNtClose(MountHandle);
-}
-
-static VOID FspFileSystemRemoveMountPoint_Directory(HANDLE MountHandle)
-{
-    /* directory is marked DELETE_ON_CLOSE */
-    CloseHandle(MountHandle);
-}
-
 FSP_API VOID FspFileSystemRemoveMountPoint(FSP_FILE_SYSTEM *FileSystem)
 {
     if (0 == FileSystem->MountPoint)
         return;
 
-    if (FspPathIsDrive(FileSystem->MountPoint))
-        FspFileSystemRemoveMountPoint_Drive(FileSystem->MountPoint, FileSystem->VolumeName,
-            FileSystem->MountHandle);
-    else
-        FspFileSystemRemoveMountPoint_Directory(FileSystem->MountHandle);
+    FSP_MOUNT_DESC Desc;
+
+    memset(&Desc, 0, sizeof Desc);
+    Desc.VolumeHandle = FileSystem->VolumeHandle;
+    Desc.VolumeName = FileSystem->VolumeName;
+    Desc.MountPoint = FileSystem->MountPoint;
+    Desc.MountHandle = FileSystem->MountHandle;
+
+    FspMountRemove(&Desc);
 
     MemFree(FileSystem->MountPoint);
     FileSystem->MountPoint = 0;
@@ -636,6 +367,11 @@ FSP_API NTSTATUS FspFileSystemStartDispatcher(FSP_FILE_SYSTEM *FileSystem, ULONG
 
         for (ThreadCount = 0; 0 != ProcessMask; ProcessMask >>= 1)
             ThreadCount += ProcessMask & 1;
+
+        if (ThreadCount < FspFileSystemDispatcherDefaultThreadCountMin)
+            ThreadCount = FspFileSystemDispatcherDefaultThreadCountMin;
+        else if (ThreadCount > FspFileSystemDispatcherDefaultThreadCountMax)
+            ThreadCount = FspFileSystemDispatcherDefaultThreadCountMax;
     }
 
     if (ThreadCount < FspFileSystemDispatcherThreadCountMin)

src/dll/fsctl.c

@@ -107,6 +107,20 @@ exit:
     return Result;
 }
 
+FSP_API NTSTATUS FspFsctlMakeMountdev(HANDLE VolumeHandle,
+    BOOLEAN Persistent, GUID *UniqueId)
+{
+    DWORD Bytes;
+
+    if (!DeviceIoControl(VolumeHandle,
+        FSP_FSCTL_MOUNTDEV,
+        &Persistent, sizeof Persistent, UniqueId, sizeof *UniqueId,
+        &Bytes, 0))
+        return FspNtStatusFromWin32(GetLastError());
+
+    return STATUS_SUCCESS;
+}
+
 FSP_API NTSTATUS FspFsctlTransact(HANDLE VolumeHandle,
     PVOID ResponseBuf, SIZE_T ResponseBufSize,
     PVOID RequestBuf, SIZE_T *PRequestBufSize,

src/dll/fsop.c

@@ -443,6 +443,7 @@ static NTSTATUS FspFileSystemOpCreate_FileCreate(FSP_FILE_SYSTEM *FileSystem,
             0 != Request->Req.Create.Ea.Size ?
                 (PVOID)(Request->Buffer + Request->Req.Create.Ea.Offset) : 0,
             Request->Req.Create.Ea.Size,
+            Request->Req.Create.EaIsReparsePoint,
             AddrOfFileContext(FullContext), &OpenFileInfo.FileInfo);
     else
         Result = FileSystem->Interface->Create(FileSystem,
@@ -590,6 +591,7 @@ static NTSTATUS FspFileSystemOpCreate_FileOpenIf(FSP_FILE_SYSTEM *FileSystem,
                 0 != Request->Req.Create.Ea.Size ?
                     (PVOID)(Request->Buffer + Request->Req.Create.Ea.Offset) : 0,
                 Request->Req.Create.Ea.Size,
+                Request->Req.Create.EaIsReparsePoint,
                 AddrOfFileContext(FullContext), &OpenFileInfo.FileInfo);
         else
             Result = FileSystem->Interface->Create(FileSystem,
@@ -724,6 +726,7 @@ static NTSTATUS FspFileSystemOpCreate_FileOverwriteIf(FSP_FILE_SYSTEM *FileSyste
                 0 != Request->Req.Create.Ea.Size ?
                     (PVOID)(Request->Buffer + Request->Req.Create.Ea.Offset) : 0,
                 Request->Req.Create.Ea.Size,
+                Request->Req.Create.EaIsReparsePoint,
                 AddrOfFileContext(FullContext), &OpenFileInfo.FileInfo);
         else
             Result = FileSystem->Interface->Create(FileSystem,

src/dll/fuse/fuse.c

@@ -54,6 +54,10 @@ static struct fuse_opt fsp_fuse_core_opts[] =
     FSP_FUSE_CORE_OPT("umask=%o", umask, 0),
     FSP_FUSE_CORE_OPT("create_umask=", set_create_umask, 1),
     FSP_FUSE_CORE_OPT("create_umask=%o", create_umask, 0),
+    FSP_FUSE_CORE_OPT("create_file_umask=", set_create_file_umask, 1),
+    FSP_FUSE_CORE_OPT("create_file_umask=%o", create_file_umask, 0),
+    FSP_FUSE_CORE_OPT("create_dir_umask=", set_create_dir_umask, 1),
+    FSP_FUSE_CORE_OPT("create_dir_umask=%o", create_dir_umask, 0),
     FSP_FUSE_CORE_OPT("uid=", set_uid, 1),
     FSP_FUSE_CORE_OPT("uid=%d", uid, 0),
     FSP_FUSE_CORE_OPT("gid=", set_gid, 1),
@@ -71,6 +75,9 @@ static struct fuse_opt fsp_fuse_core_opts[] =
     FSP_FUSE_CORE_OPT("rellinks", rellinks, 1),
     FSP_FUSE_CORE_OPT("norellinks", rellinks, 0),
 
+    FSP_FUSE_CORE_OPT("dothidden", dothidden, 1),
+    FSP_FUSE_CORE_OPT("nodothidden", dothidden, 0),
+
     FUSE_OPT_KEY("fstypename=", 'F'),
     FUSE_OPT_KEY("volname=", 'v'),
 
@@ -95,6 +102,17 @@ static struct fuse_opt fsp_fuse_core_opts[] =
     FUSE_OPT_KEY("--VolumePrefix=", 'U'),
     FUSE_OPT_KEY("FileSystemName=", 'F'),
     FUSE_OPT_KEY("--FileSystemName=", 'F'),
+    FUSE_OPT_KEY("ExactFileSystemName=", 'E'),
+    FUSE_OPT_KEY("--ExactFileSystemName=", 'E'),
+
+    FSP_FUSE_CORE_OPT("UserName=", set_uid, 1),
+    FUSE_OPT_KEY("UserName=", 'u'),
+    FSP_FUSE_CORE_OPT("--UserName=", set_uid, 1),
+    FUSE_OPT_KEY("--UserName=", 'u'),
+    FSP_FUSE_CORE_OPT("GroupName=", set_gid, 1),
+    FUSE_OPT_KEY("GroupName=", 'g'),
+    FSP_FUSE_CORE_OPT("--GroupName=", set_gid, 1),
+    FUSE_OPT_KEY("--GroupName=", 'g'),
 
     FUSE_OPT_END,
 };
@@ -226,6 +244,43 @@ FSP_FUSE_API int fsp_fuse_is_lib_option(struct fsp_fuse_env *env,
     return fsp_fuse_opt_match(env, fsp_fuse_core_opts, opt);
 }
 
+static int fsp_fuse_username_to_uid(const char *username, int *puid)
+{
+    union
+    {
+        SID V;
+        UINT8 B[SECURITY_MAX_SID_SIZE];
+    } SidBuf;
+    char Name[256], Domn[256];
+    DWORD SidSize, NameSize, DomnSize;
+    SID_NAME_USE Use;
+    UINT32 Uid;
+    NTSTATUS Result;
+
+    *puid = 0;
+
+    NameSize = lstrlenA(username) + 1;
+    if (sizeof Name / sizeof Name[0] < NameSize)
+        return -1;
+    memcpy(Name, username, NameSize);
+    for (PSTR P = Name, EndP = P + NameSize; EndP > P; P++)
+        if ('+' == *P)
+            *P = '\\';
+
+    SidSize = sizeof SidBuf;
+    DomnSize = sizeof Domn / sizeof Domn[0];
+    if (!LookupAccountNameA(0, Name, &SidBuf, &SidSize, Domn, &DomnSize, &Use))
+        return -1;
+
+    Result = FspPosixMapSidToUid(&SidBuf, &Uid);
+    if (!NT_SUCCESS(Result))
+        return -1;
+
+    *puid = Uid;
+
+    return 0;
+}
+
 static int fsp_fuse_core_opt_proc(void *opt_data0, const char *arg, int key,
     struct fuse_args *outargs)
 {
@@ -241,9 +296,12 @@ static int fsp_fuse_core_opt_proc(void *opt_data0, const char *arg, int key,
             FSP_FUSE_LIBRARY_NAME " options:\n"
             "    -o umask=MASK              set file permissions (octal)\n"
             "    -o create_umask=MASK       set newly created file permissions (octal)\n"
+            "        -o create_file_umask=MASK      for files only\n"
+            "        -o create_dir_umask=MASK       for directories only\n"
             "    -o uid=N                   set file owner (-1 for mounting user id)\n"
             "    -o gid=N                   set file group (-1 for mounting user group)\n"
             "    -o rellinks                interpret absolute symlinks as volume relative\n"
+            "    -o dothidden               dot files have the Windows hidden file attrib\n"
             "    -o volname=NAME            set volume label\n"
             "    -o VolumePrefix=UNC        set UNC prefix (/Server/Share)\n"
             "        --VolumePrefix=UNC     set UNC prefix (\\Server\\Share)\n"
@@ -311,6 +369,40 @@ static int fsp_fuse_core_opt_proc(void *opt_data0, const char *arg, int key,
             [sizeof opt_data->VolumeParams.FileSystemName / sizeof(WCHAR) - 1] = L'\0';
         memcpy(opt_data->VolumeParams.FileSystemName, L"FUSE-", 5 * sizeof(WCHAR));
         return 0;
+    case 'E':
+        if ('E' == arg[0])
+            arg += sizeof "ExactFileSystemName=" - 1;
+        else if ('E' == arg[2])
+            arg += sizeof "--ExactFileSystemName=" - 1;
+        if (0 == MultiByteToWideChar(CP_UTF8, 0, arg, -1,
+            opt_data->VolumeParams.FileSystemName,
+            sizeof opt_data->VolumeParams.FileSystemName / sizeof(WCHAR)))
+            return -1;
+        opt_data->VolumeParams.FileSystemName
+            [sizeof opt_data->VolumeParams.FileSystemName / sizeof(WCHAR) - 1] = L'\0';
+        return 0;
+    case 'u':
+        if ('U' == arg[0])
+            arg += sizeof "UserName=" - 1;
+        else if ('U' == arg[2])
+            arg += sizeof "--UserName=" - 1;
+        if (-1 == fsp_fuse_username_to_uid(arg, &opt_data->uid))
+        {
+            opt_data->username_to_uid_result = -1;
+            return -1;
+        }
+        return 0;
+    case 'g':
+        if ('G' == arg[0])
+            arg += sizeof "GroupName=" - 1;
+        else if ('G' == arg[2])
+            arg += sizeof "--GroupName=" - 1;
+        if (-1 == fsp_fuse_username_to_uid(arg, &opt_data->gid))
+        {
+            opt_data->username_to_uid_result = -1;
+            return -1;
+        }
+        return 0;
     case 'v':
         arg += sizeof "volname=" - 1;
         opt_data->VolumeLabelLength = (UINT16)(sizeof(WCHAR) *
@@ -355,7 +447,14 @@ FSP_FUSE_API struct fuse *fsp_fuse_new(struct fsp_fuse_env *env,
     opt_data.VolumeParams.FlushAndPurgeOnCleanup = TRUE;
 
     if (-1 == fsp_fuse_core_opt_parse(env, args, &opt_data, /*help=*/1))
+    {
+        if (-1 == opt_data.username_to_uid_result)
+        {
+            ErrorMessage = L": invalid user or group name.";
+            goto fail;
+        }
         return 0;
+    }
     if (opt_data.help)
         return 0;
 
@@ -422,9 +521,12 @@ FSP_FUSE_API struct fuse *fsp_fuse_new(struct fsp_fuse_env *env,
     f->env = env;
     f->set_umask = opt_data.set_umask; f->umask = opt_data.umask;
     f->set_create_umask = opt_data.set_create_umask; f->create_umask = opt_data.create_umask;
+    f->set_create_file_umask = opt_data.set_create_file_umask; f->create_file_umask = opt_data.create_file_umask;
+    f->set_create_dir_umask = opt_data.set_create_dir_umask; f->create_dir_umask = opt_data.create_dir_umask;
     f->set_uid = opt_data.set_uid; f->uid = opt_data.uid;
     f->set_gid = opt_data.set_gid; f->gid = opt_data.gid;
     f->rellinks = opt_data.rellinks;
+    f->dothidden = opt_data.dothidden;
     f->ThreadCount = opt_data.ThreadCount;
     memcpy(&f->ops, ops, opsize);
     f->data = data;

src/dll/fuse/fuse_intf.c

@@ -354,6 +354,7 @@ static inline UINT32 fsp_fuse_intf_MapFlagsToFileAttributes(uint32_t flags)
     return FileAttributes;
 }
 
+#define FUSE_FILE_INFO(IsDirectory, fi) ((IsDirectory) ? 0 : (fi))
 #define fsp_fuse_intf_GetFileInfoEx(FileSystem, PosixPath, fi, PUid, PGid, PMode, FileInfo)\
     fsp_fuse_intf_GetFileInfoFunnel(FileSystem, PosixPath, fi, 0, PUid, PGid, PMode, 0, FileInfo)
 static NTSTATUS fsp_fuse_intf_GetFileInfoFunnel(FSP_FILE_SYSTEM *FileSystem,
@@ -429,6 +430,15 @@ static NTSTATUS fsp_fuse_intf_GetFileInfoFunnel(FSP_FILE_SYSTEM *FileSystem,
     }
     if (StatEx)
         FileInfo->FileAttributes |= fsp_fuse_intf_MapFlagsToFileAttributes(stbuf.st_flags);
+    if (f->dothidden)
+    {
+        const char *basename = PosixPath;
+        for (const char *p = PosixPath; '\0' != *p; p++)
+            if ('/' == *p)
+                basename = p + 1;
+        if ('.' == basename[0])
+            FileInfo->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
+    }
     FileInfo->FileSize = stbuf.st_size;
     FileInfo->AllocationSize =
         (FileInfo->FileSize + AllocationUnit - 1) / AllocationUnit * AllocationUnit;
@@ -743,7 +753,7 @@ exit:
 static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
     PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
     UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
-    PFILE_FULL_EA_INFORMATION Ea, ULONG EaLength,
+    PVOID ExtraBuffer, ULONG ExtraLength, BOOLEAN ExtraBufferIsReparsePoint,
     PVOID *PFileDesc, FSP_FSCTL_FILE_INFO *FileInfo)
 {
     struct fuse *f = FileSystem->UserContext;
@@ -757,7 +767,9 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
     int err;
     NTSTATUS Result;
 
-    if (0 != Ea)
+    if (0 != ExtraBuffer)
+    {
+        if (!ExtraBufferIsReparsePoint)
         {
             if (0 == f->ops.listxattr || 0 == f->ops.getxattr ||
                 0 == f->ops.setxattr || 0 == f->ops.removexattr)
@@ -766,6 +778,13 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
                 goto exit;
             }
         }
+        else
+        {
+            /* !!!: revisit */
+            Result = STATUS_INVALID_PARAMETER;
+            goto exit;
+        }
+    }
 
     filedesc = MemAlloc(sizeof *filedesc);
     if (0 == filedesc)
@@ -785,8 +804,22 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
             goto exit;
     }
     Mode &= ~context->umask;
+    if (CreateOptions & FILE_DIRECTORY_FILE)
+    {
+        if (f->set_create_dir_umask)
+            Mode = 0777 & ~f->create_dir_umask;
+        else
         if (f->set_create_umask)
             Mode = 0777 & ~f->create_umask;
+    }
+    else
+    {
+        if (f->set_create_file_umask)
+            Mode = 0777 & ~f->create_file_umask;
+        else
+        if (f->set_create_umask)
+            Mode = 0777 & ~f->create_umask;
+    }
 
     memset(&fi, 0, sizeof fi);
     if ('C' == f->env->environment) /* Cygwin */
@@ -866,13 +899,22 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
             goto exit;
     }
 
-    if (0 != Ea)
+    if (0 != ExtraBuffer)
+    {
+        if (!ExtraBufferIsReparsePoint)
         {
             Result = FspFileSystemEnumerateEa(FileSystem,
-            fsp_fuse_intf_SetEaEntry, contexthdr->PosixPath, Ea, EaLength);
+                fsp_fuse_intf_SetEaEntry, contexthdr->PosixPath, ExtraBuffer, ExtraLength);
             if (!NT_SUCCESS(Result))
                 goto exit;
         }
+        else
+        {
+            /* !!!: revisit: WslFeatures, GetFileInfoFunnel, GetReparsePointEx, SetReparsePoint */
+            Result = STATUS_INVALID_PARAMETER;
+            goto exit;
+        }
+    }
     /*
      * Ignore fuse_file_info::direct_io, fuse_file_info::keep_cache.
      * NOTE: Originally WinFsp dit not support disabling the cache manager
@@ -881,7 +923,8 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
      * Ignore fuse_file_info::nonseekable.
      */
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, contexthdr->PosixPath, &fi,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, contexthdr->PosixPath,
+        FUSE_FILE_INFO(CreateOptions & FILE_DIRECTORY_FILE, &fi),
         &Uid, &Gid, &Mode, &FileInfoBuf);
     if (!NT_SUCCESS(Result))
         goto exit;
@@ -983,6 +1026,20 @@ static NTSTATUS fsp_fuse_intf_Open(FSP_FILE_SYSTEM *FileSystem,
     }
     else
     {
+        /*
+         * Some Windows applications (notably Go programs) specify FILE_APPEND_DATA without
+         * FILE_WRITE_DATA when opening files for appending. This caused the WinFsp-FUSE layer
+         * to erroneously pass O_RDONLY to the FUSE file system in such cases. We add a test
+         * for FILE_APPEND_DATA to ensure that either O_WRONLY or O_RDWR is specified and that
+         * the O_APPEND flag is set.
+         */
+        if (GrantedAccess & FILE_APPEND_DATA)
+        {
+            if (fi.flags == 0)
+                fi.flags = 1; /* need O_WRONLY as a bare minimum in order to append */
+            fi.flags |= 8/*O_APPEND*/;
+        }
+
         if (0 != f->ops.open)
         {
             err = f->ops.open(contexthdr->PosixPath, &fi);
@@ -1096,7 +1153,8 @@ static NTSTATUS fsp_fuse_intf_Overwrite(FSP_FILE_SYSTEM *FileSystem,
             return Result;
     }
 
-    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, FileInfo);
 }
 
@@ -1227,7 +1285,8 @@ static NTSTATUS fsp_fuse_intf_Write(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, &FileInfoBuf);
     if (!NT_SUCCESS(Result))
         return Result;
@@ -1307,7 +1366,8 @@ static NTSTATUS fsp_fuse_intf_Flush(FSP_FILE_SYSTEM *FileSystem,
     if (!NT_SUCCESS(Result))
         return Result;
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, &FileInfoBuf);
     if (!NT_SUCCESS(Result))
         return Result;
@@ -1330,7 +1390,8 @@ static NTSTATUS fsp_fuse_intf_GetFileInfo(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, FileInfo);
 }
 
@@ -1368,7 +1429,8 @@ static NTSTATUS fsp_fuse_intf_SetBasicInfo(FSP_FILE_SYSTEM *FileSystem,
     {
         if (0 == LastAccessTime || 0 == LastWriteTime)
         {
-            Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+            Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+                FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
                 &Uid, &Gid, &Mode, &FileInfoBuf);
             if (!NT_SUCCESS(Result))
                 return Result;
@@ -1415,7 +1477,8 @@ static NTSTATUS fsp_fuse_intf_SetBasicInfo(FSP_FILE_SYSTEM *FileSystem,
             return Result;
     }
 
-    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, FileInfo);
 }
 
@@ -1442,7 +1505,8 @@ static NTSTATUS fsp_fuse_intf_SetFileSize(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, &FileInfoBuf);
     if (!NT_SUCCESS(Result))
         return Result;
@@ -1589,7 +1653,8 @@ static NTSTATUS fsp_fuse_intf_GetSecurity(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    return fsp_fuse_intf_GetSecurityEx(FileSystem, filedesc->PosixPath, &fi,
+    return fsp_fuse_intf_GetSecurityEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &FileAttributes, SecurityDescriptorBuf, PSecurityDescriptorSize);
 }
 
@@ -1613,8 +1678,9 @@ static NTSTATUS fsp_fuse_intf_SetSecurity(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi, &Uid, &Gid, &Mode,
-        &FileInfo);
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
+        &Uid, &Gid, &Mode, &FileInfo);
     if (!NT_SUCCESS(Result))
         goto exit;
 
@@ -1712,7 +1778,7 @@ int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
         UINT32 Uid, Gid, Mode;
         NTSTATUS Result0;
 
-        Result0 = fsp_fuse_intf_GetFileInfoFunnel(dh->FileSystem, 0, 0, stbuf,
+        Result0 = fsp_fuse_intf_GetFileInfoFunnel(dh->FileSystem, name, 0, stbuf,
             &Uid, &Gid, &Mode, 0, &DirInfo->FileInfo);
         if (NT_SUCCESS(Result0))
             DirInfo->Padding[0] = 1; /* HACK: remember that the FileInfo is valid */
@@ -1972,7 +2038,9 @@ static NTSTATUS fsp_fuse_intf_GetReparsePoint(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    return fsp_fuse_intf_GetReparsePointEx(FileSystem, filedesc->PosixPath, &fi, Buffer, PSize);
+    return fsp_fuse_intf_GetReparsePointEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
+        Buffer, PSize);
 }
 
 static NTSTATUS fsp_fuse_intf_SetReparsePoint(FSP_FILE_SYSTEM *FileSystem,
@@ -2043,7 +2111,8 @@ static NTSTATUS fsp_fuse_intf_SetReparsePoint(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, &FileInfo);
     if (!NT_SUCCESS(Result))
         return Result;
@@ -2316,7 +2385,8 @@ static NTSTATUS fsp_fuse_intf_SetEa(FSP_FILE_SYSTEM *FileSystem,
     fi.flags = filedesc->OpenFlags;
     fi.fh = filedesc->FileHandle;
 
-    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath, &fi,
+    return fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
         &Uid, &Gid, &Mode, FileInfo);
 }
 

src/dll/fuse/fuse_opt.c

@@ -216,11 +216,13 @@ static int fsp_fuse_opt_call_proc(struct fsp_fuse_env *env,
             goto exit;
     }
 
+    result = 0;
+
 exit:
     if (0 != fullarg)
         env->memfree(fullarg);
 
-    return 0;
+    return result;
 }
 
 static int fsp_fuse_opt_process_arg(struct fsp_fuse_env *env,

src/dll/fuse/library.h

@@ -50,9 +50,12 @@ struct fuse
     struct fsp_fuse_env *env;
     int set_umask, umask;
     int set_create_umask, create_umask;
+    int set_create_file_umask, create_file_umask;
+    int set_create_dir_umask, create_dir_umask;
     int set_uid, uid;
     int set_gid, gid;
     int rellinks;
+    int dothidden;
     unsigned ThreadCount;
     struct fuse_operations ops;
     void *data;
@@ -137,10 +140,13 @@ struct fsp_fuse_core_opt_data
     HANDLE DebugLogHandle;
     int set_umask, umask,
         set_create_umask, create_umask,
-        set_uid, uid,
+        set_create_file_umask, create_file_umask,
+        set_create_dir_umask, create_dir_umask,
+        set_uid, uid, username_to_uid_result,
         set_gid, gid,
         set_attr_timeout, attr_timeout,
-        rellinks;
+        rellinks,
+        dothidden;
     int set_FileInfoTimeout,
         set_DirInfoTimeout,
         set_EaTimeout,

src/dll/library.h

@@ -91,6 +91,21 @@ static inline BOOLEAN FspPathIsDrive(PWSTR FileName)
         ) &&
         L':' == FileName[1] && L'\0' == FileName[2];
 }
+static inline BOOLEAN FspPathIsMountmgrMountPoint(PWSTR FileName)
+{
+    return
+        (
+            L'\\' == FileName[0] &&
+            L'\\' == FileName[1] &&
+            (L'?' == FileName[2] || L'.' == FileName[2]) &&
+            L'\\' == FileName[3]
+        ) &&
+        (
+            (L'A' <= FileName[4] && FileName[4] <= L'Z') ||
+            (L'a' <= FileName[4] && FileName[4] <= L'z')
+        ) &&
+        L':' == FileName[5];
+}
 
 #define FSP_NEXT_EA(Ea, EaEnd)          \
     (0 != (Ea)->NextEntryOffset ? (PVOID)((PUINT8)(Ea) + (Ea)->NextEntryOffset) : (EaEnd))

src/dll/mount.c

@@ -0,0 +1,612 @@
+/**
+ * @file dll/mount.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <dll/library.h>
+
+static INIT_ONCE FspMountInitOnce = INIT_ONCE_STATIC_INIT;
+static NTSTATUS (NTAPI *FspNtOpenSymbolicLinkObject)(
+    PHANDLE LinkHandle, ACCESS_MASK DesiredAccess, POBJECT_ATTRIBUTES ObjectAttributes);
+static NTSTATUS (NTAPI *FspNtMakeTemporaryObject)(
+    HANDLE Handle);
+static NTSTATUS (NTAPI *FspNtClose)(
+    HANDLE Handle);
+
+static BOOL WINAPI FspMountInitialize(
+    PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
+{
+    HANDLE Handle;
+
+    Handle = GetModuleHandleW(L"ntdll.dll");
+    if (0 != Handle)
+    {
+        FspNtOpenSymbolicLinkObject = (PVOID)GetProcAddress(Handle, "NtOpenSymbolicLinkObject");
+        FspNtMakeTemporaryObject = (PVOID)GetProcAddress(Handle, "NtMakeTemporaryObject");
+        FspNtClose = (PVOID)GetProcAddress(Handle, "NtClose");
+
+        if (0 == FspNtOpenSymbolicLinkObject || 0 == FspNtMakeTemporaryObject || 0 == FspNtClose)
+        {
+            FspNtOpenSymbolicLinkObject = 0;
+            FspNtMakeTemporaryObject = 0;
+            FspNtClose = 0;
+        }
+    }
+
+    return TRUE;
+}
+
+static NTSTATUS FspMountmgrControl(ULONG IoControlCode,
+    PVOID InputBuffer, ULONG InputBufferLength, PVOID OutputBuffer, PULONG POutputBufferLength)
+{
+    HANDLE MgrHandle = INVALID_HANDLE_VALUE;
+    DWORD Bytes = 0;
+    NTSTATUS Result;
+
+    if (0 == POutputBufferLength)
+        POutputBufferLength = &Bytes;
+
+    MgrHandle = CreateFileW(L"\\\\.\\MountPointManager",
+        GENERIC_READ | GENERIC_WRITE,
+        FILE_SHARE_READ | FILE_SHARE_WRITE,
+        0,
+        OPEN_EXISTING,
+        0,
+        0);
+    if (INVALID_HANDLE_VALUE == MgrHandle)
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    if (!DeviceIoControl(MgrHandle,
+        IoControlCode,
+        InputBuffer, InputBufferLength, OutputBuffer, *POutputBufferLength,
+        &Bytes, 0))
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    *POutputBufferLength = Bytes;
+    Result = STATUS_SUCCESS;
+
+exit:
+    if (INVALID_HANDLE_VALUE != MgrHandle)
+        CloseHandle(MgrHandle);
+
+    return Result;
+}
+
+static NTSTATUS FspMountSet_Mountmgr(HANDLE VolumeHandle, PWSTR VolumeName, PWSTR MountPoint)
+{
+    /* only support drives for now! (format: \\.\X:) */
+    if (L'\0' != MountPoint[6])
+        return STATUS_INVALID_PARAMETER;
+
+    /* mountmgr.h */
+    typedef enum
+    {
+        Disabled = 0,
+        Enabled,
+    } MOUNTMGR_AUTO_MOUNT_STATE;
+    typedef struct
+    {
+        MOUNTMGR_AUTO_MOUNT_STATE CurrentState;
+    } MOUNTMGR_QUERY_AUTO_MOUNT;
+    typedef struct
+    {
+        MOUNTMGR_AUTO_MOUNT_STATE NewState;
+    } MOUNTMGR_SET_AUTO_MOUNT;
+    typedef struct
+    {
+        USHORT DeviceNameLength;
+        WCHAR DeviceName[1];
+    } MOUNTMGR_TARGET_NAME;
+    typedef struct
+    {
+        USHORT SymbolicLinkNameOffset;
+        USHORT SymbolicLinkNameLength;
+        USHORT DeviceNameOffset;
+        USHORT DeviceNameLength;
+    } MOUNTMGR_CREATE_POINT_INPUT;
+
+    GUID UniqueId;
+    MOUNTMGR_QUERY_AUTO_MOUNT QueryAutoMount;
+    MOUNTMGR_SET_AUTO_MOUNT SetAutoMount;
+    MOUNTMGR_TARGET_NAME *TargetName = 0;
+    MOUNTMGR_CREATE_POINT_INPUT *CreatePointInput = 0;
+    ULONG VolumeNameSize, QueryAutoMountSize, TargetNameSize, CreatePointInputSize;
+    HKEY RegKey;
+    LONG RegResult;
+    WCHAR RegValueName[MAX_PATH];
+    UINT8 RegValueData[sizeof UniqueId];
+    DWORD RegValueNameSize, RegValueDataSize;
+    DWORD RegType;
+    NTSTATUS Result;
+
+    /* transform our volume into one that can be used by the MountManager */
+    Result = FspFsctlMakeMountdev(VolumeHandle, FALSE, &UniqueId);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    VolumeNameSize = lstrlenW(VolumeName) * sizeof(WCHAR);
+    QueryAutoMountSize = sizeof QueryAutoMount;
+    TargetNameSize = FIELD_OFFSET(MOUNTMGR_TARGET_NAME, DeviceName) + VolumeNameSize;
+    CreatePointInputSize = sizeof *CreatePointInput +
+        sizeof L"\\DosDevices\\X:" - sizeof(WCHAR) + VolumeNameSize;
+
+    TargetName = MemAlloc(TargetNameSize);
+    if (0 == TargetName)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    CreatePointInput = MemAlloc(CreatePointInputSize);
+    if (0 == CreatePointInput)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    /* query the current AutoMount value and save it */
+    Result = FspMountmgrControl(
+        CTL_CODE('m', 15, METHOD_BUFFERED, FILE_ANY_ACCESS),
+            /* IOCTL_MOUNTMGR_QUERY_AUTO_MOUNT */
+        0, 0, &QueryAutoMount, &QueryAutoMountSize);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* disable AutoMount */
+    SetAutoMount.NewState = 0;
+    Result = FspMountmgrControl(
+        CTL_CODE('m', 16, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS),
+            /* IOCTL_MOUNTMGR_SET_AUTO_MOUNT */
+        &SetAutoMount, sizeof SetAutoMount, 0, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* announce volume arrival */
+    memset(TargetName, 0, sizeof *TargetName);
+    TargetName->DeviceNameLength = (USHORT)VolumeNameSize;
+    memcpy(TargetName->DeviceName,
+        VolumeName, TargetName->DeviceNameLength);
+    Result = FspMountmgrControl(
+        CTL_CODE('m', 11, METHOD_BUFFERED, FILE_READ_ACCESS),
+            /* IOCTL_MOUNTMGR_VOLUME_ARRIVAL_NOTIFICATION */
+        TargetName, TargetNameSize, 0, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* reset the AutoMount value to the saved one */
+    SetAutoMount.NewState = QueryAutoMount.CurrentState;
+    FspMountmgrControl(
+        CTL_CODE('m', 16, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS),
+            /* IOCTL_MOUNTMGR_SET_AUTO_MOUNT */
+        &SetAutoMount, sizeof SetAutoMount, 0, 0);
+#if 0
+    if (!NT_SUCCESS(Result))
+        goto exit;
+#endif
+
+    /* create mount point */
+    memset(CreatePointInput, 0, sizeof *CreatePointInput);
+    CreatePointInput->SymbolicLinkNameOffset = sizeof *CreatePointInput;
+    CreatePointInput->SymbolicLinkNameLength = sizeof L"\\DosDevices\\X:" - sizeof(WCHAR);
+    CreatePointInput->DeviceNameOffset =
+        CreatePointInput->SymbolicLinkNameOffset + CreatePointInput->SymbolicLinkNameLength;
+    CreatePointInput->DeviceNameLength = (USHORT)VolumeNameSize;
+    memcpy((PUINT8)CreatePointInput + CreatePointInput->SymbolicLinkNameOffset,
+        L"\\DosDevices\\X:", CreatePointInput->SymbolicLinkNameLength);
+    ((PWCHAR)((PUINT8)CreatePointInput + CreatePointInput->SymbolicLinkNameOffset))[12] =
+        MountPoint[4] & ~0x20;
+        /* convert to uppercase */
+    memcpy((PUINT8)CreatePointInput + CreatePointInput->DeviceNameOffset,
+        VolumeName, CreatePointInput->DeviceNameLength);
+    Result = FspMountmgrControl(
+        CTL_CODE('m', 0, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS),
+            /* IOCTL_MOUNTMGR_CREATE_POINT */
+        CreatePointInput, CreatePointInputSize, 0, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* HACK: delete the MountManager registry entries */
+    RegResult = RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"System\\MountedDevices",
+        0, KEY_READ | KEY_WRITE, &RegKey);
+    if (ERROR_SUCCESS == RegResult)
+    {
+        for (DWORD I = 0;; I++)
+        {
+            RegValueNameSize = MAX_PATH;
+            RegValueDataSize = sizeof RegValueData;
+            RegResult = RegEnumValueW(RegKey,
+                I, RegValueName, &RegValueNameSize, 0, &RegType, RegValueData, &RegValueDataSize);
+            if (ERROR_NO_MORE_ITEMS == RegResult)
+                break;
+            else if (ERROR_SUCCESS != RegResult)
+                continue;
+
+            if (REG_BINARY == RegType &&
+                sizeof RegValueData == RegValueDataSize &&
+                InlineIsEqualGUID((GUID *)&RegValueData, &UniqueId))
+            {
+                RegResult = RegDeleteValueW(RegKey, RegValueName);
+                if (ERROR_SUCCESS == RegResult)
+                    /* reset index after modifying key; only safe way to use RegEnumValueW with modifications */
+                    I = -1;
+            }
+        }
+
+        RegCloseKey(RegKey);
+    }
+
+    Result = STATUS_SUCCESS;
+
+exit:
+    MemFree(CreatePointInput);
+    MemFree(TargetName);
+
+    return Result;
+}
+
+static NTSTATUS FspMountRemove_Mountmgr(PWSTR MountPoint)
+{
+    /* mountmgr.h */
+    typedef struct
+    {
+        ULONG SymbolicLinkNameOffset;
+        USHORT SymbolicLinkNameLength;
+        USHORT Reserved1;
+        ULONG UniqueIdOffset;
+        USHORT UniqueIdLength;
+        USHORT Reserved2;
+        ULONG DeviceNameOffset;
+        USHORT DeviceNameLength;
+        USHORT Reserved3;
+    } MOUNTMGR_MOUNT_POINT;
+    typedef struct
+    {
+        ULONG Size;
+        ULONG NumberOfMountPoints;
+        MOUNTMGR_MOUNT_POINT MountPoints[1];
+    } MOUNTMGR_MOUNT_POINTS;
+
+    MOUNTMGR_MOUNT_POINT *Input = 0;
+    MOUNTMGR_MOUNT_POINTS *Output = 0;
+    ULONG InputSize, OutputSize;
+    NTSTATUS Result;
+
+    InputSize = sizeof *Input + sizeof L"\\DosDevices\\X:" - sizeof(WCHAR);
+    OutputSize = 4096;
+
+    Input = MemAlloc(InputSize);
+    if (0 == Input)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    Output = MemAlloc(OutputSize);
+    if (0 == Output)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    memset(Input, 0, sizeof *Input);
+    Input->SymbolicLinkNameOffset = sizeof *Input;
+    Input->SymbolicLinkNameLength = sizeof L"\\DosDevices\\X:" - sizeof(WCHAR);
+    memcpy((PUINT8)Input + Input->SymbolicLinkNameOffset,
+        L"\\DosDevices\\X:", Input->SymbolicLinkNameLength);
+    ((PWCHAR)((PUINT8)Input + Input->SymbolicLinkNameOffset))[12] = MountPoint[4] & ~0x20;
+        /* convert to uppercase */
+    Result = FspMountmgrControl(
+        CTL_CODE('m', 1, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS),
+            /* IOCTL_MOUNTMGR_DELETE_POINTS */
+        Input, InputSize, Output, &OutputSize);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = STATUS_SUCCESS;
+
+exit:
+    MemFree(Output);
+    MemFree(Input);
+
+    return Result;
+}
+
+static NTSTATUS FspLauncherDefineDosDevice(
+    WCHAR Sign, PWSTR MountPoint, PWSTR VolumeName)
+{
+    if (2 != lstrlenW(MountPoint) ||
+        FSP_FSCTL_VOLUME_NAME_SIZEMAX / sizeof(WCHAR) <= lstrlenW(VolumeName))
+        return STATUS_INVALID_PARAMETER;
+
+    WCHAR Argv0[4];
+    PWSTR Argv[2];
+    NTSTATUS Result;
+    ULONG ErrorCode;
+
+    Argv0[0] = Sign;
+    Argv0[1] = MountPoint[0];
+    Argv0[2] = MountPoint[1];
+    Argv0[3] = L'\0';
+
+    Argv[0] = Argv0;
+    Argv[1] = VolumeName;
+
+    Result = FspLaunchCallLauncherPipe(FspLaunchCmdDefineDosDevice, 2, Argv, 0, 0, 0, &ErrorCode);
+    return !NT_SUCCESS(Result) ? Result : FspNtStatusFromWin32(ErrorCode);
+}
+
+static NTSTATUS FspMountSet_Drive(PWSTR VolumeName, PWSTR MountPoint, PHANDLE PMountHandle)
+{
+    NTSTATUS Result;
+    BOOLEAN IsLocalSystem, IsServiceContext;
+
+    *PMountHandle = 0;
+
+    Result = FspServiceContextCheck(0, &IsLocalSystem);
+    IsServiceContext = NT_SUCCESS(Result) && !IsLocalSystem;
+    if (IsServiceContext)
+    {
+        /*
+         * If the current process is in the service context but not LocalSystem,
+         * ask the launcher to DefineDosDevice for us. This is because the launcher
+         * runs in the LocalSystem context and can create global drives.
+         *
+         * In this case the launcher will also add DELETE access to the drive symlink
+         * for us, so that we can make it temporary below.
+         */
+        Result = FspLauncherDefineDosDevice(L'+', MountPoint, VolumeName);
+        if (!NT_SUCCESS(Result))
+            return Result;
+    }
+    else
+    {
+        if (!DefineDosDeviceW(DDD_RAW_TARGET_PATH, MountPoint, VolumeName))
+            return FspNtStatusFromWin32(GetLastError());
+    }
+
+    if (0 != FspNtOpenSymbolicLinkObject)
+    {
+        WCHAR SymlinkBuf[6];
+        UNICODE_STRING Symlink;
+        OBJECT_ATTRIBUTES Obja;
+
+        memcpy(SymlinkBuf, L"\\??\\X:", sizeof SymlinkBuf);
+        SymlinkBuf[4] = MountPoint[0];
+        Symlink.Length = Symlink.MaximumLength = sizeof SymlinkBuf;
+        Symlink.Buffer = SymlinkBuf;
+
+        memset(&Obja, 0, sizeof Obja);
+        Obja.Length = sizeof Obja;
+        Obja.ObjectName = &Symlink;
+        Obja.Attributes = OBJ_CASE_INSENSITIVE;
+
+        Result = FspNtOpenSymbolicLinkObject(PMountHandle, DELETE, &Obja);
+        if (NT_SUCCESS(Result))
+        {
+            Result = FspNtMakeTemporaryObject(*PMountHandle);
+            if (!NT_SUCCESS(Result))
+            {
+                FspNtClose(*PMountHandle);
+                *PMountHandle = 0;
+            }
+        }
+    }
+
+    /* HACK:
+     *
+     * Handles do not use the low 2 bits (unless they are console handles).
+     * Abuse this fact to remember that we are running in the service context.
+     */
+    *PMountHandle = (HANDLE)(UINT_PTR)((DWORD)(UINT_PTR)*PMountHandle | IsServiceContext);
+
+    return STATUS_SUCCESS;
+}
+
+static NTSTATUS FspMountRemove_Drive(PWSTR VolumeName, PWSTR MountPoint, HANDLE MountHandle)
+{
+    NTSTATUS Result;
+    BOOLEAN IsServiceContext;
+
+    IsServiceContext = 0 != ((DWORD)(UINT_PTR)MountHandle & 1);
+    MountHandle = (HANDLE)(UINT_PTR)((DWORD)(UINT_PTR)MountHandle & ~1);
+    if (IsServiceContext)
+        /*
+         * If the current process is in the service context but not LocalSystem,
+         * ask the launcher to DefineDosDevice for us. This is because the launcher
+         * runs in the LocalSystem context and can remove global drives.
+         */
+        Result = FspLauncherDefineDosDevice(L'-', MountPoint, VolumeName);
+    else
+        Result = DefineDosDeviceW(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION | DDD_EXACT_MATCH_ON_REMOVE,
+            MountPoint, VolumeName) ? STATUS_SUCCESS : FspNtStatusFromWin32(GetLastError());
+
+    if (0 != MountHandle)
+        FspNtClose(MountHandle);
+
+    return Result;
+}
+
+static NTSTATUS FspMountSet_Directory(PWSTR VolumeName, PWSTR MountPoint,
+    PSECURITY_DESCRIPTOR SecurityDescriptor, PHANDLE PMountHandle)
+{
+    NTSTATUS Result;
+    SECURITY_ATTRIBUTES SecurityAttributes;
+    HANDLE MountHandle = INVALID_HANDLE_VALUE;
+    DWORD Backslashes, Bytes;
+    USHORT VolumeNameLength, BackslashLength, ReparseDataLength;
+    PREPARSE_DATA_BUFFER ReparseData = 0;
+    PWSTR P, PathBuffer;
+
+    *PMountHandle = 0;
+
+    /*
+     * Windows does not allow mount points (junctions) to point to network file systems.
+     *
+     * Count how many backslashes our VolumeName has. If it is 3 or more this is a network
+     * file system. Preemptively return STATUS_NETWORK_ACCESS_DENIED.
+     */
+    for (P = VolumeName, Backslashes = 0; *P; P++)
+        if (L'\\' == *P)
+            if (3 == ++Backslashes)
+            {
+                Result = STATUS_NETWORK_ACCESS_DENIED;
+                goto exit;
+            }
+
+    memset(&SecurityAttributes, 0, sizeof SecurityAttributes);
+    SecurityAttributes.nLength = sizeof SecurityAttributes;
+    SecurityAttributes.lpSecurityDescriptor = SecurityDescriptor;
+
+    MountHandle = CreateFileW(MountPoint,
+        FILE_WRITE_ATTRIBUTES,
+        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        &SecurityAttributes,
+        CREATE_NEW,
+        FILE_ATTRIBUTE_DIRECTORY |
+            FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_DELETE_ON_CLOSE,
+        0);
+    if (INVALID_HANDLE_VALUE == MountHandle)
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    VolumeNameLength = (USHORT)lstrlenW(VolumeName);
+    BackslashLength = 0 == VolumeNameLength || L'\\' != VolumeName[VolumeNameLength - 1];
+    VolumeNameLength *= sizeof(WCHAR);
+    BackslashLength *= sizeof(WCHAR);
+
+    ReparseDataLength = (USHORT)(
+        FIELD_OFFSET(REPARSE_DATA_BUFFER, MountPointReparseBuffer.PathBuffer) -
+        FIELD_OFFSET(REPARSE_DATA_BUFFER, MountPointReparseBuffer)) +
+        2 * (VolumeNameLength + BackslashLength + sizeof(WCHAR));
+    ReparseData = MemAlloc(REPARSE_DATA_BUFFER_HEADER_SIZE + ReparseDataLength);
+    if (0 == ReparseData)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    ReparseData->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
+    ReparseData->ReparseDataLength = ReparseDataLength;
+    ReparseData->Reserved = 0;
+    ReparseData->MountPointReparseBuffer.SubstituteNameOffset = 0;
+    ReparseData->MountPointReparseBuffer.SubstituteNameLength =
+        VolumeNameLength + BackslashLength;
+    ReparseData->MountPointReparseBuffer.PrintNameOffset =
+        ReparseData->MountPointReparseBuffer.SubstituteNameLength + sizeof(WCHAR);
+    ReparseData->MountPointReparseBuffer.PrintNameLength =
+        VolumeNameLength + BackslashLength;
+
+    PathBuffer = ReparseData->MountPointReparseBuffer.PathBuffer;
+    memcpy(PathBuffer, VolumeName, VolumeNameLength);
+    if (BackslashLength)
+        PathBuffer[VolumeNameLength / sizeof(WCHAR)] = L'\\';
+    PathBuffer[(VolumeNameLength + BackslashLength) / sizeof(WCHAR)] = L'\0';
+
+    PathBuffer = ReparseData->MountPointReparseBuffer.PathBuffer +
+        (ReparseData->MountPointReparseBuffer.PrintNameOffset) / sizeof(WCHAR);
+    memcpy(PathBuffer, VolumeName, VolumeNameLength);
+    if (BackslashLength)
+        PathBuffer[VolumeNameLength / sizeof(WCHAR)] = L'\\';
+    PathBuffer[(VolumeNameLength + BackslashLength) / sizeof(WCHAR)] = L'\0';
+
+    if (!DeviceIoControl(MountHandle, FSCTL_SET_REPARSE_POINT,
+        ReparseData, REPARSE_DATA_BUFFER_HEADER_SIZE + ReparseData->ReparseDataLength,
+        0, 0,
+        &Bytes, 0))
+    {
+        Result = FspNtStatusFromWin32(GetLastError());
+        goto exit;
+    }
+
+    *PMountHandle = MountHandle;
+
+    Result = STATUS_SUCCESS;
+
+exit:
+    if (!NT_SUCCESS(Result) && INVALID_HANDLE_VALUE != MountHandle)
+        CloseHandle(MountHandle);
+
+    MemFree(ReparseData);
+
+    return Result;
+}
+
+static NTSTATUS FspMountRemove_Directory(HANDLE MountHandle)
+{
+    /* directory is marked DELETE_ON_CLOSE */
+    return CloseHandle(MountHandle) ? STATUS_SUCCESS : FspNtStatusFromWin32(GetLastError());
+}
+
+FSP_API NTSTATUS FspMountSet(FSP_MOUNT_DESC *Desc)
+{
+    InitOnceExecuteOnce(&FspMountInitOnce, FspMountInitialize, 0, 0);
+
+    Desc->MountHandle = 0;
+
+    if (L'*' == Desc->MountPoint[0] && ':' == Desc->MountPoint[1] && L'\0' == Desc->MountPoint[2])
+    {
+        NTSTATUS Result;
+        DWORD Drives;
+        WCHAR Drive;
+
+        Drives = GetLogicalDrives();
+        if (0 == Drives)
+            return FspNtStatusFromWin32(GetLastError());
+
+        for (Drive = 'Z'; 'D' <= Drive; Drive--)
+            if (0 == (Drives & (1 << (Drive - 'A'))))
+            {
+                Desc->MountPoint[0] = Drive;
+                Result = FspMountSet_Drive(Desc->VolumeName, Desc->MountPoint,
+                    &Desc->MountHandle);
+                if (NT_SUCCESS(Result))
+                    return Result;
+            }
+        Desc->MountPoint[0] = L'*';
+        return STATUS_NO_SUCH_DEVICE;
+    }
+    else if (FspPathIsMountmgrMountPoint(Desc->MountPoint))
+        return FspMountSet_Mountmgr(Desc->VolumeHandle, Desc->VolumeName, Desc->MountPoint);
+    else if (FspPathIsDrive(Desc->MountPoint))
+        return FspMountSet_Drive(Desc->VolumeName, Desc->MountPoint,
+            &Desc->MountHandle);
+    else
+        return FspMountSet_Directory(Desc->VolumeName, Desc->MountPoint, Desc->Security,
+            &Desc->MountHandle);
+}
+
+FSP_API NTSTATUS FspMountRemove(FSP_MOUNT_DESC *Desc)
+{
+    InitOnceExecuteOnce(&FspMountInitOnce, FspMountInitialize, 0, 0);
+
+    if (FspPathIsMountmgrMountPoint(Desc->MountPoint))
+        return FspMountRemove_Mountmgr(Desc->MountPoint);
+    else if (FspPathIsDrive(Desc->MountPoint))
+        return FspMountRemove_Drive(Desc->VolumeName, Desc->MountPoint, Desc->MountHandle);
+    else
+        return FspMountRemove_Directory(Desc->MountHandle);
+}

src/dotnet/FileSystemBase.cs

@@ -1085,8 +1085,9 @@ namespace Fsp
             UInt32 FileAttributes,
             Byte[] SecurityDescriptor,
             UInt64 AllocationSize,
-            IntPtr Ea,
-            UInt32 EaLength,
+            IntPtr ExtraBuffer,
+            UInt32 ExtraLength,
+            Boolean ExtraBufferIsReparsePoint,
             out Object FileNode,
             out Object FileDesc,
             out FileInfo FileInfo,
@@ -1391,6 +1392,16 @@ namespace Fsp
             }
         }
         /// <summary>
+        /// Makes a byte array that contains a reparse point.
+        /// </summary>
+        /// <returns>The reparse point byte array.</returns>
+        public static Byte[] MakeReparsePoint(
+            IntPtr Buffer,
+            UInt32 Size)
+        {
+            return Api.MakeReparsePoint(Buffer, (UIntPtr)Size);
+        }
+        /// <summary>
         /// Gets the reparse tag from reparse data.
         /// </summary>
         /// <param name="ReparseData">

src/dotnet/FileSystemHost.cs

@@ -40,6 +40,7 @@ namespace Fsp
         /// <param name="FileSystem">The file system to host.</param>
         public FileSystemHost(FileSystemBase FileSystem)
         {
+            _VolumeParams.Version = (UInt16)Marshal.SizeOf(_VolumeParams);
             _VolumeParams.Flags = VolumeParams.UmFileContextIsFullContext;
             _FileSystem = FileSystem;
         }
@@ -126,6 +127,86 @@ namespace Fsp
             set { _VolumeParams.FileInfoTimeout = value; }
         }
         /// <summary>
+        /// Gets or sets the volume information timeout.
+        /// </summary>
+        public UInt32 VolumeInfoTimeout
+        {
+            get
+            {
+                return 0 != (_VolumeParams.AdditionalFlags & VolumeParams.VolumeInfoTimeoutValid) ?
+                    _VolumeParams.VolumeInfoTimeout : _VolumeParams.FileInfoTimeout;
+            }
+            set
+            {
+                _VolumeParams.AdditionalFlags |= VolumeParams.VolumeInfoTimeoutValid;
+                _VolumeParams.VolumeInfoTimeout = value;
+            }
+        }
+        /// <summary>
+        /// Gets or sets the directory information timeout.
+        /// </summary>
+        public UInt32 DirInfoTimeout
+        {
+            get
+            {
+                return 0 != (_VolumeParams.AdditionalFlags & VolumeParams.DirInfoTimeoutValid) ?
+                    _VolumeParams.DirInfoTimeout : _VolumeParams.FileInfoTimeout;
+            }
+            set
+            {
+                _VolumeParams.AdditionalFlags |= VolumeParams.DirInfoTimeoutValid;
+                _VolumeParams.DirInfoTimeout = value;
+            }
+        }
+        /// <summary>
+        /// Gets or sets the security information timeout.
+        /// </summary>
+        public UInt32 SecurityTimeout
+        {
+            get
+            {
+                return 0 != (_VolumeParams.AdditionalFlags & VolumeParams.SecurityTimeoutValid) ?
+                    _VolumeParams.SecurityTimeout : _VolumeParams.FileInfoTimeout;
+            }
+            set
+            {
+                _VolumeParams.AdditionalFlags |= VolumeParams.SecurityTimeoutValid;
+                _VolumeParams.SecurityTimeout = value;
+            }
+        }
+        /// <summary>
+        /// Gets or sets the stream information timeout.
+        /// </summary>
+        public UInt32 StreamInfoTimeout
+        {
+            get
+            {
+                return 0 != (_VolumeParams.AdditionalFlags & VolumeParams.StreamInfoTimeoutValid) ?
+                    _VolumeParams.StreamInfoTimeout : _VolumeParams.FileInfoTimeout;
+            }
+            set
+            {
+                _VolumeParams.AdditionalFlags |= VolumeParams.StreamInfoTimeoutValid;
+                _VolumeParams.StreamInfoTimeout = value;
+            }
+        }
+        /// <summary>
+        /// Gets or sets the EA information timeout.
+        /// </summary>
+        public UInt32 EaTimeout
+        {
+            get
+            {
+                return 0 != (_VolumeParams.AdditionalFlags & VolumeParams.EaTimeoutValid) ?
+                    _VolumeParams.EaTimeout : _VolumeParams.FileInfoTimeout;
+            }
+            set
+            {
+                _VolumeParams.AdditionalFlags |= VolumeParams.EaTimeoutValid;
+                _VolumeParams.EaTimeout = value;
+            }
+        }
+        /// <summary>
         /// Gets or sets a value that determines whether the file system is case sensitive.
         /// </summary>
         public Boolean CaseSensitiveSearch
@@ -221,6 +302,11 @@ namespace Fsp
             get { return 0 != (_VolumeParams.Flags & VolumeParams.AllowOpenInKernelMode); }
             set { _VolumeParams.Flags |= (value ? VolumeParams.AllowOpenInKernelMode : 0); }
         }
+        public Boolean WslFeatures
+        {
+            get { return 0 != (_VolumeParams.Flags & VolumeParams.WslFeatures); }
+            set { _VolumeParams.Flags |= (value ? VolumeParams.WslFeatures : 0); }
+        }
         /// <summary>
         /// Gets or sets the prefix for a network file system.
         /// </summary>
@@ -274,11 +360,44 @@ namespace Fsp
         /// A value of 0 disables all debug logging.
         /// A value of -1 enables all debug logging.
         /// </param>
-        /// <returns></returns>
+        /// <returns>STATUS_SUCCESS or error code.</returns>
         public Int32 Mount(String MountPoint,
             Byte[] SecurityDescriptor = null,
             Boolean Synchronized = false,
             UInt32 DebugLog = 0)
+        {
+            return MountEx(MountPoint, 0, SecurityDescriptor, Synchronized, DebugLog);
+        }
+        /// <summary>
+        /// Mounts a file system.
+        /// </summary>
+        /// <param name="MountPoint">
+        /// The mount point for the new file system. A value of null means that
+        /// the file system should use the next available drive letter counting
+        /// downwards from Z: as its mount point.
+        /// </param>
+        /// <param name="ThreadCount">
+        /// Number of threads to use to service file system requests. A value
+        /// of 0 means that the default number of threads should be used.
+        /// </param>
+        /// <param name="SecurityDescriptor">
+        /// Security descriptor to use if mounting on (newly created) directory.
+        /// A value of null means the directory should be created with default
+        /// security.
+        /// </param>
+        /// <param name="Synchronized">
+        /// If true file system operations are synchronized using an exclusive lock.
+        /// </param>
+        /// <param name="DebugLog">
+        /// A value of 0 disables all debug logging.
+        /// A value of -1 enables all debug logging.
+        /// </param>
+        /// <returns>STATUS_SUCCESS or error code.</returns>
+        public Int32 MountEx(String MountPoint,
+            UInt32 ThreadCount,
+            Byte[] SecurityDescriptor = null,
+            Boolean Synchronized = false,
+            UInt32 DebugLog = 0)
         {
             Int32 Result;
             try
@@ -315,7 +434,7 @@ namespace Fsp
                 }
                 if (0 <= Result)
                 {
-                    Result = Api.FspFileSystemStartDispatcher(_FileSystemPtr, 0);
+                    Result = Api.FspFileSystemStartDispatcher(_FileSystemPtr, ThreadCount);
                     if (0 > Result)
                         try
                         {
@@ -381,6 +500,83 @@ namespace Fsp
         {
             return Api.GetVersion();
         }
+        /// <summary>
+        /// Returns a RequestHint to reference the current operation asynchronously.
+        /// </summary>
+        public UInt64 GetOperationRequestHint()
+        {
+            return Api.FspFileSystemGetOperationRequestHint();
+        }
+        /// <summary>
+        /// Asynchronously complete a Read operation.
+        /// </summary>
+        /// <param name="RequestHint">
+        /// A reference to the operation to complete.
+        /// </param>
+        /// <param name="Status">
+        /// STATUS_SUCCESS or error code.
+        /// </param>
+        /// <param name="BytesTransferred">
+        /// Number of bytes read.
+        /// </param>
+        public void SendReadResponse(UInt64 RequestHint, Int32 Status, UInt32 BytesTransferred)
+        {
+            FspFsctlTransactRsp Response = default(FspFsctlTransactRsp);
+            Response.Size = 128;
+            Response.Kind = (UInt32)FspFsctlTransact.ReadKind;
+            Response.Hint = RequestHint;
+            Response.IoStatus.Information = BytesTransferred;
+            Response.IoStatus.Status = (UInt32)Status;
+            Api.FspFileSystemSendResponse(_FileSystemPtr, ref Response);
+        }
+        /// <summary>
+        /// Asynchronously complete a Write operation.
+        /// </summary>
+        /// <param name="RequestHint">
+        /// A reference to the operation to complete.
+        /// </param>
+        /// <param name="Status">
+        /// STATUS_SUCCESS or error code.
+        /// </param>
+        /// <param name="BytesTransferred">
+        /// The number of bytes written.
+        /// </param>
+        /// <param name="FileInfo">
+        /// Updated file information.
+        /// </param>
+        public void SendWriteResponse(UInt64 RequestHint, Int32 Status, UInt32 BytesTransferred, ref FileInfo FileInfo)
+        {
+            FspFsctlTransactRsp Response = default(FspFsctlTransactRsp);
+            Response.Size = 128;
+            Response.Kind = (UInt32)FspFsctlTransact.WriteKind;
+            Response.Hint = RequestHint;
+            Response.IoStatus.Information = BytesTransferred;
+            Response.IoStatus.Status = (UInt32)Status;
+            Response.WriteFileInfo = FileInfo;
+            Api.FspFileSystemSendResponse(_FileSystemPtr, ref Response);
+        }
+        /// <summary>
+        /// Asynchronously complete a ReadDirectory operation.
+        /// </summary>
+        /// <param name="RequestHint">
+        /// A reference to the operation to complete.
+        /// </param>
+        /// <param name="Status">
+        /// STATUS_SUCCESS or error code.
+        /// </param>
+        /// <param name="BytesTransferred">
+        /// Number of bytes read.
+        /// </param>
+        public void SendReadDirectoryResponse(UInt64 RequestHint, Int32 Status, UInt32 BytesTransferred)
+        {
+            FspFsctlTransactRsp Response = default(FspFsctlTransactRsp);
+            Response.Size = 128;
+            Response.Kind = (UInt32)FspFsctlTransact.QueryDirectoryKind;
+            Response.Hint = RequestHint;
+            Response.IoStatus.Information = BytesTransferred;
+            Response.IoStatus.Status = (UInt32)Status;
+            Api.FspFileSystemSendResponse(_FileSystemPtr, ref Response);
+        }
 
         /* FSP_FILE_SYSTEM_INTERFACE */
         private static Byte[] ByteBufferNotNull = new Byte[0];
@@ -472,8 +668,9 @@ namespace Fsp
             UInt32 FileAttributes,
             IntPtr SecurityDescriptor,
             UInt64 AllocationSize,
-            IntPtr Ea,
-            UInt32 EaLength,
+            IntPtr ExtraBuffer,
+            UInt32 ExtraLength,
+            Boolean ExtraBufferIsReparsePoint,
             ref FullContext FullContext,
             ref OpenFileInfo OpenFileInfo)
         {
@@ -490,8 +687,9 @@ namespace Fsp
                     FileAttributes,
                     Api.MakeSecurityDescriptor(SecurityDescriptor),
                     AllocationSize,
-                    Ea,
-                    EaLength,
+                    ExtraBuffer,
+                    ExtraLength,
+                    ExtraBufferIsReparsePoint,
                     out FileNode,
                     out FileDesc,
                     out OpenFileInfo.FileInfo,

src/dotnet/Interop.cs

@@ -53,9 +53,16 @@ namespace Fsp.Interop
         internal const UInt32 UmFileContextIsFullContext = 0x00020000;
         internal const UInt32 AllowOpenInKernelMode = 0x01000000;
         internal const UInt32 CasePreservedExtendedAttributes = 0x02000000;
+        internal const UInt32 WslFeatures = 0x04000000;
         internal const int PrefixSize = 192;
         internal const int FileSystemNameSize = 16;
 
+        internal const UInt32 VolumeInfoTimeoutValid = 0x00000001;
+        internal const UInt32 DirInfoTimeoutValid = 0x00000002;
+        internal const UInt32 SecurityTimeoutValid = 0x00000004;
+        internal const UInt32 StreamInfoTimeoutValid = 0x00000008;
+        internal const UInt32 EaTimeoutValid = 0x00000010;
+
         internal UInt16 Version;
         internal UInt16 SectorSize;
         internal UInt16 SectorsPerAllocationUnit;
@@ -69,6 +76,15 @@ namespace Fsp.Interop
         internal UInt32 Flags;
         internal unsafe fixed UInt16 Prefix[PrefixSize];
         internal unsafe fixed UInt16 FileSystemName[FileSystemNameSize];
+        internal UInt32 AdditionalFlags;
+        internal UInt32 VolumeInfoTimeout;
+        internal UInt32 DirInfoTimeout;
+        internal UInt32 SecurityTimeout;
+        internal UInt32 StreamInfoTimeout;
+        internal UInt32 EaTimeout;
+        internal UInt32 FsextControlCode;
+        internal unsafe fixed UInt32 Reserved32[1];
+        internal unsafe fixed UInt64 Reserved64[2];
 
         internal unsafe String GetPrefix()
         {
@@ -354,6 +370,65 @@ namespace Fsp.Interop
         public IntPtr Information;
     }
 
+    [StructLayout(LayoutKind.Sequential)]
+    internal struct IoStatus
+    {
+        internal UInt32 Information;
+        internal UInt32 Status;
+    }
+
+    internal enum FspFsctlTransact
+    {
+        ReadKind = 5,
+        WriteKind = 6,
+        QueryDirectoryKind = 14
+    }
+
+    [StructLayout(LayoutKind.Explicit)]
+    internal struct FspFsctlTransactReq
+    {
+        [FieldOffset(0)]
+        internal UInt16 Version;
+        [FieldOffset(2)]
+        internal UInt16 Size;
+        [FieldOffset(4)]
+        internal UInt32 Kind;
+        [FieldOffset(8)]
+        internal UInt64 Hint;
+
+        [FieldOffset(0)]
+        internal unsafe fixed Byte Padding[88];
+    }
+
+    [StructLayout(LayoutKind.Explicit)]
+    internal struct FspFsctlTransactRsp
+    {
+        [FieldOffset(0)]
+        internal UInt16 Version;
+        [FieldOffset(2)]
+        internal UInt16 Size;
+        [FieldOffset(4)]
+        internal UInt32 Kind;
+        [FieldOffset(8)]
+        internal UInt64 Hint;
+
+        [FieldOffset(16)]
+        internal IoStatus IoStatus;
+
+        [FieldOffset(24)]
+        internal FileInfo WriteFileInfo;
+
+        [FieldOffset(0)]
+        internal unsafe fixed Byte Padding[128];
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    internal unsafe struct FspFileSystemOperationContext
+    {
+        internal FspFsctlTransactReq *Request;
+        internal FspFsctlTransactRsp *Response;
+    }
+
     [StructLayout(LayoutKind.Sequential)]
     internal struct FileSystemInterface
     {
@@ -557,8 +632,9 @@ namespace Fsp.Interop
                 UInt32 FileAttributes,
                 IntPtr SecurityDescriptor,
                 UInt64 AllocationSize,
-                IntPtr Ea,
-                UInt32 EaLength,
+                IntPtr ExtraBuffer,
+                UInt32 ExtraLength,
+                [MarshalAs(UnmanagedType.U1)] Boolean ExtraBufferIsReparsePoint,
                 ref FullContext FullContext,
                 ref OpenFileInfo OpenFileInfo);
             [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
@@ -662,6 +738,12 @@ namespace Fsp.Interop
             internal delegate Int32 FspFileSystemStopDispatcher(
                 IntPtr FileSystem);
             [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+            internal delegate void FspFileSystemSendResponse(
+                IntPtr FileSystem,
+                ref FspFsctlTransactRsp Response);
+            [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+            internal unsafe delegate FspFileSystemOperationContext *FspFileSystemGetOperationContext();
+            [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
             internal delegate IntPtr FspFileSystemMountPointF(
                 IntPtr FileSystem);
             [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
@@ -846,6 +928,8 @@ namespace Fsp.Interop
         internal static Proto.FspFileSystemRemoveMountPoint FspFileSystemRemoveMountPoint;
         internal static Proto.FspFileSystemStartDispatcher FspFileSystemStartDispatcher;
         internal static Proto.FspFileSystemStopDispatcher FspFileSystemStopDispatcher;
+        internal static Proto.FspFileSystemSendResponse FspFileSystemSendResponse;
+        internal static Proto.FspFileSystemGetOperationContext FspFileSystemGetOperationContext;
         internal static Proto.FspFileSystemMountPointF FspFileSystemMountPoint;
         internal static Proto.FspFileSystemSetOperationGuardStrategyF FspFileSystemSetOperationGuardStrategy;
         internal static Proto.FspFileSystemSetDebugLogF FspFileSystemSetDebugLog;
@@ -892,6 +976,10 @@ namespace Fsp.Interop
             else
                 return _FspFileSystemSetMountPointEx(FileSystem, MountPoint, IntPtr.Zero);
         }
+        internal static unsafe UInt64 FspFileSystemGetOperationRequestHint()
+        {
+            return FspFileSystemGetOperationContext()->Request->Hint;
+        }
         internal static unsafe Boolean FspFileSystemAddDirInfo(
             ref DirInfo DirInfo,
             IntPtr Buffer,
@@ -1240,6 +1328,8 @@ namespace Fsp.Interop
             FspFileSystemRemoveMountPoint = GetEntryPoint<Proto.FspFileSystemRemoveMountPoint>(Module);
             FspFileSystemStartDispatcher = GetEntryPoint<Proto.FspFileSystemStartDispatcher>(Module);
             FspFileSystemStopDispatcher = GetEntryPoint<Proto.FspFileSystemStopDispatcher>(Module);
+            FspFileSystemSendResponse = GetEntryPoint<Proto.FspFileSystemSendResponse>(Module);
+            FspFileSystemGetOperationContext = GetEntryPoint<Proto.FspFileSystemGetOperationContext>(Module);
             FspFileSystemMountPoint = GetEntryPoint<Proto.FspFileSystemMountPointF>(Module);
             FspFileSystemSetOperationGuardStrategy = GetEntryPoint<Proto.FspFileSystemSetOperationGuardStrategyF>(Module);
             FspFileSystemSetDebugLog = GetEntryPoint<Proto.FspFileSystemSetDebugLogF>(Module);

src/ku/library.h

@@ -0,0 +1,222 @@
+/**
+ * @file ku/library.h
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#ifndef WINFSP_KU_LIBRARY_H_INCLUDED
+#define WINFSP_KU_LIBRARY_H_INCLUDED
+
+#if !defined(_KERNEL_MODE)
+
+#include <dll/library.h>
+#include <aclapi.h>
+#define _NTDEF_
+#include <ntsecapi.h>
+
+#define FSP_KU_CODE                     ((void)0)
+
+#else
+
+#include <sys/driver.h>
+
+#define FSP_KU_CODE                     PAGED_CODE(); NTSTATUS fsp_ku_status = STATUS_SUCCESS; (VOID)fsp_ku_status
+
+#define FSP_API                         FSP_DDI
+
+#define BYTE                            UINT8
+#define BOOL                            BOOLEAN
+#define LPBOOL                          PBOOLEAN
+#define UINT                            ULONG
+
+#define GetLastError()                  ((DWORD)fsp_ku_status)
+#define FspNtStatusFromWin32(Err)       ((NTSTATUS)(Err))
+#define ERROR_INSUFFICIENT_BUFFER       STATUS_BUFFER_TOO_SMALL
+
+#define InitOnceExecuteOnce(I, F, P, C) RtlRunOnceExecuteOnce(I, F, P, C)
+#define INIT_ONCE                       RTL_RUN_ONCE
+#define INIT_ONCE_STATIC_INIT           RTL_RUN_ONCE_INIT
+
+#define AddAccessAllowedAce(Acl, Rev, Acc, Sid)\
+                                        (fsp_ku_status = RtlAddAccessAllowedAce(Acl, Rev, Acc, Sid),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define AddAccessDeniedAce(Acl, Rev, Acc, Sid)\
+                                        (fsp_ku_status = FspKuAddAccessDeniedAce(Acl, Rev, Acc, Sid),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define EqualSid(Sid1, Sid2)            (fsp_ku_status = 0, RtlEqualSid(Sid1, Sid2))
+#define GetAce(Acl, Idx, Ace)           (fsp_ku_status = RtlGetAce(Acl, Idx, Ace), NT_SUCCESS(fsp_ku_status))
+#define GetAclInformation(Acl, Inf, Len, Cls)\
+                                        (fsp_ku_status = FspKuQueryInformationAcl(Acl, Inf, Len, Cls),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define GetLengthSid(Sid)               (fsp_ku_status = 0, RtlLengthSid(Sid))
+#define GetSecurityDescriptorDacl(Sec, Prs, Dac, Def)\
+                                        (fsp_ku_status = RtlGetDaclSecurityDescriptor(Sec, Prs, Dac, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define GetSecurityDescriptorGroup(Sec, Grp, Def)\
+                                        (fsp_ku_status = RtlGetGroupSecurityDescriptor(Sec, Grp, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define GetSecurityDescriptorOwner(Sec, Own, Def)\
+                                        (fsp_ku_status = RtlGetOwnerSecurityDescriptor(Sec, Own, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define GetSidIdentifierAuthority(Sid)  (fsp_ku_status = 0, &((PISID)(Sid))->IdentifierAuthority)
+#define GetSidSubAuthority(Sid, Sub)    (fsp_ku_status = 0, RtlSubAuthoritySid(Sid, Sub))
+#define GetSidSubAuthorityCount(Sid)    (fsp_ku_status = 0, RtlSubAuthorityCountSid(Sid))
+#define InitializeAcl(Acl, Len, Rev)    (fsp_ku_status = RtlCreateAcl(Acl, Len, Rev), NT_SUCCESS(fsp_ku_status))
+#define InitializeSecurityDescriptor(Sec, Rev)\
+                                        (fsp_ku_status = RtlCreateSecurityDescriptor(Sec, Rev),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define InitializeSid(Sid, Aut, Cnt)    (fsp_ku_status = RtlInitializeSid(Sid, Aut, Cnt), NT_SUCCESS(fsp_ku_status))
+#define IsValidSid(Sid)                 (RtlValidSid(Sid) || (fsp_ku_status = STATUS_INVALID_SID, FALSE))
+#define MakeSelfRelativeSD(Abs, Rel, Len)\
+                                        (fsp_ku_status = RtlAbsoluteToSelfRelativeSD(Abs, Rel, Len),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define SetSecurityDescriptorControl(Sec, Msk, Bit)\
+                                        (fsp_ku_status = FspKuSetControlSecurityDescriptor(Sec, Msk, Bit),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define SetSecurityDescriptorDacl(Sec, Prs, Dac, Def)\
+                                        (fsp_ku_status = RtlSetDaclSecurityDescriptor(Sec, Prs, Dac, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define SetSecurityDescriptorGroup(Sec, Grp, Def)\
+                                        (fsp_ku_status = RtlSetGroupSecurityDescriptor(Sec, Grp, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+#define SetSecurityDescriptorOwner(Sec, Own, Def)\
+                                        (fsp_ku_status = RtlSetOwnerSecurityDescriptor(Sec, Own, Def),\
+                                            NT_SUCCESS(fsp_ku_status))
+static inline NTSTATUS FspKuAddAccessDeniedAce(
+    PACL Acl,
+    ULONG AceRevision,
+    ACCESS_MASK AccessMask,
+    PSID Sid)
+{
+    /* We are missing RtlAddAccessDeniedAce. So we need this malarkey! */
+    NTSTATUS Result;
+    PACE_HEADER Ace;
+    Result = RtlAddAccessAllowedAce(Acl, AceRevision, AccessMask, Sid);
+    if (!NT_SUCCESS(Result))
+        return Result;
+    Result = RtlGetAce(Acl, Acl->AceCount - 1, &Ace);
+    if (!NT_SUCCESS(Result))
+        return Result;
+    Ace->AceType = ACCESS_DENIED_ACE_TYPE;
+    return STATUS_SUCCESS;
+}
+typedef enum
+{
+    AclRevisionInformation__DO_NOT_USE = 1,
+    AclSizeInformation,
+} ACL_INFORMATION_CLASS;
+typedef struct
+{
+    DWORD AceCount;
+    DWORD AclBytesInUse__DO_NOT_USE;
+    DWORD AclBytesFree__DO_NOT_USE;
+} ACL_SIZE_INFORMATION, *PACL_SIZE_INFORMATION;
+static inline NTSTATUS FspKuQueryInformationAcl(
+    PACL Acl,
+    PVOID AclInformation,
+    ULONG AclInformationLength,
+    ACL_INFORMATION_CLASS AclInformationClass)
+{
+    ASSERT(AclSizeInformation == AclInformationClass);
+    ASSERT(sizeof(ACL_SIZE_INFORMATION) <= AclInformationLength);
+    ((PACL_SIZE_INFORMATION)AclInformation)->AceCount = Acl->AceCount;
+    return STATUS_SUCCESS;
+}
+static inline NTSTATUS FspKuSetControlSecurityDescriptor(
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    SECURITY_DESCRIPTOR_CONTROL ControlMask,
+    SECURITY_DESCRIPTOR_CONTROL ControlBits)
+{
+    ((PUSHORT)(SecurityDescriptor))[1] &= ~ControlMask;
+    ((PUSHORT)(SecurityDescriptor))[1] |= ControlBits;
+    return STATUS_SUCCESS;
+}
+
+#define WideCharToMultiByte(C, F, W, w, B, b, D, d)\
+                                        (FspKuWideCharToMultiByte(C, F, W, w, B, b, D, d, &fsp_ku_status))
+#define MultiByteToWideChar(C, F, B, b, W, w)\
+                                        (FspKuMultiByteToWideChar(C, F, B, b, W, w, &fsp_ku_status))
+#define CP_UTF8                         65001
+static inline int FspKuWideCharToMultiByte(
+    UINT CodePage,
+    DWORD dwFlags,
+    LPCWCH lpWideCharStr,
+    int cchWideChar,
+    LPSTR lpMultiByteStr,
+    int cbMultiByte,
+    LPCCH lpDefaultChar,
+    LPBOOL lpUsedDefaultChar,
+    PNTSTATUS PResult)
+{
+    ASSERT(CP_UTF8 == CodePage);
+    ASSERT(0 == dwFlags);
+    ASSERT(0 == lpDefaultChar);
+    ASSERT(0 == lpUsedDefaultChar);
+    NTSTATUS Result;
+    ULONG ByteCount;
+    if (-1 == cchWideChar)
+        cchWideChar = (int)wcslen(lpWideCharStr) + 1;
+    Result = RtlUnicodeToUTF8N(
+        lpMultiByteStr, cbMultiByte, &ByteCount,
+        lpWideCharStr, cchWideChar * sizeof(WCHAR));
+    if (STATUS_SOME_NOT_MAPPED == Result)
+        Result = STATUS_SUCCESS;
+    else if (!NT_SUCCESS(Result))
+        return 0;
+    *PResult = Result;
+    return ByteCount;
+}
+static inline int FspKuMultiByteToWideChar(
+    UINT CodePage,
+    DWORD dwFlags,
+    LPCCH lpMultiByteStr,
+    int cbMultiByte,
+    LPWSTR lpWideCharStr,
+    int cchWideChar,
+    PNTSTATUS PResult)
+{
+    ASSERT(CP_UTF8 == CodePage);
+    ASSERT(0 == dwFlags);
+    NTSTATUS Result;
+    ULONG ByteCount;
+    if (-1 == cbMultiByte)
+        cbMultiByte = (int)strlen(lpMultiByteStr) + 1;
+    Result = RtlUTF8ToUnicodeN(
+        lpWideCharStr, cchWideChar * sizeof(WCHAR), &ByteCount,
+        lpMultiByteStr, cbMultiByte);
+    if (STATUS_SOME_NOT_MAPPED == Result)
+        Result = STATUS_SUCCESS;
+    else if (!NT_SUCCESS(Result))
+        return 0;
+    *PResult = Result;
+    return ByteCount / sizeof(WCHAR);
+}
+
+static inline void *MemAlloc(size_t Size)
+{
+    return FspAlloc(Size);
+}
+static inline void MemFree(void *Pointer)
+{
+    if (0 != Pointer)
+        FspFree(Pointer);
+}
+
+#endif
+
+#endif

src/ku/posix.c

@@ -1,5 +1,5 @@
 /**
- * @file dll/posix.c
+ * @file ku/posix.c
  * POSIX Interop.
  *
  * This file provides routines for Windows/POSIX interoperability. It is based
@@ -32,15 +32,67 @@
  * associated repository.
  */
 
-#include <dll/library.h>
-#include <aclapi.h>
-#define _NTDEF_
-#include <ntsecapi.h>
+#include <ku/library.h>
 
+FSP_API NTSTATUS FspPosixMapUidToSid(UINT32 Uid, PSID *PSid);
+FSP_API NTSTATUS FspPosixMapSidToUid(PSID Sid, PUINT32 PUid);
 static PISID FspPosixCreateSid(BYTE Authority, ULONG Count, ...);
+FSP_API VOID FspDeleteSid(PSID Sid, NTSTATUS (*CreateFunc)());
+FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
+    UINT32 Uid, UINT32 Gid, UINT32 Mode,
+    PSECURITY_DESCRIPTOR *PSecurityDescriptor);
+FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PUINT32 PUid, PUINT32 PGid, PUINT32 PMode);
+FSP_API NTSTATUS FspPosixMapWindowsToPosixPathEx(PWSTR WindowsPath, char **PPosixPath,
+    BOOLEAN Translate);
+FSP_API NTSTATUS FspPosixMapPosixToWindowsPathEx(const char *PosixPath, PWSTR *PWindowsPath,
+    BOOLEAN Translate);
+FSP_API VOID FspPosixDeletePath(void *Path);
+FSP_API VOID FspPosixEncodeWindowsPath(PWSTR WindowsPath, ULONG Size);
+FSP_API VOID FspPosixDecodeWindowsPath(PWSTR WindowsPath, ULONG Size);
 
-static INIT_ONCE FspPosixInitOnce = INIT_ONCE_STATIC_INIT;
-union
+#if defined(_KERNEL_MODE)
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, FspPosixMapUidToSid)
+#pragma alloc_text(PAGE, FspPosixMapSidToUid)
+#pragma alloc_text(PAGE, FspPosixCreateSid)
+#pragma alloc_text(PAGE, FspDeleteSid)
+#pragma alloc_text(PAGE, FspPosixMapPermissionsToSecurityDescriptor)
+#pragma alloc_text(PAGE, FspPosixMapSecurityDescriptorToPermissions)
+#pragma alloc_text(PAGE, FspPosixMapWindowsToPosixPathEx)
+#pragma alloc_text(PAGE, FspPosixMapPosixToWindowsPathEx)
+#pragma alloc_text(PAGE, FspPosixDeletePath)
+#pragma alloc_text(PAGE, FspPosixEncodeWindowsPath)
+#pragma alloc_text(PAGE, FspPosixDecodeWindowsPath)
+#endif
+#endif
+
+static union
+{
+    SID V;
+    UINT8 B[sizeof(SID) - sizeof(DWORD) + (1 * sizeof(DWORD))];
+} FspWorldSidBuf =
+{
+    /* S-1-1-0 */
+    .V.Revision = SID_REVISION,
+    .V.SubAuthorityCount = 1,
+    .V.IdentifierAuthority.Value[5] = 1,
+    .V.SubAuthority[0] = 0,
+};
+static union
+{
+    SID V;
+    UINT8 B[sizeof(SID) - sizeof(DWORD) + (1 * sizeof(DWORD))];
+} FspAuthUsersSidBuf =
+{
+    /* S-1-5-11 */
+    .V.Revision = SID_REVISION,
+    .V.SubAuthorityCount = 1,
+    .V.IdentifierAuthority.Value[5] = 5,
+    .V.SubAuthority[0] = 11,
+};
+static union
 {
     SID V;
     UINT8 B[sizeof(SID) - sizeof(DWORD) + (1 * sizeof(DWORD))];
@@ -52,11 +104,15 @@ union
     .V.IdentifierAuthority.Value[5] = 0,
     .V.SubAuthority[0] = 65534,
 };
-static PISID FspAccountDomainSid, FspPrimaryDomainSid;
 
+#define FspWorldSid                     (&FspWorldSidBuf.V)
+#define FspAuthUsersSid                 (&FspAuthUsersSidBuf.V)
 #define FspUnmappedSid                  (&FspUnmappedSidBuf.V)
 #define FspUnmappedUid                  (65534)
 
+static PISID FspAccountDomainSid, FspPrimaryDomainSid;
+static INIT_ONCE FspPosixInitOnce = INIT_ONCE_STATIC_INIT;
+#if !defined(_KERNEL_MODE)
 static BOOL WINAPI FspPosixInitialize(
     PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
 {
@@ -120,9 +176,79 @@ VOID FspPosixFinalize(BOOLEAN Dynamic)
         MemFree(FspPrimaryDomainSid);
     }
 }
+#else
+ULONG NTAPI FspPosixInitialize(
+    PRTL_RUN_ONCE RunOnce, PVOID Parameter, PVOID *Context)
+{
+    static union
+    {
+        SID V;
+        UINT8 B[SECURITY_MAX_SID_SIZE];
+    } FspAccountDomainSidBuf;
+    static union
+    {
+        SID V;
+        UINT8 B[SECURITY_MAX_SID_SIZE];
+    } FspPrimaryDomainSidBuf;
+    UNICODE_STRING Path;
+    UNICODE_STRING Name;
+    union
+    {
+        KEY_VALUE_PARTIAL_INFORMATION V;
+        UINT8 B[FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data) + SECURITY_MAX_SID_SIZE];
+    } Value;
+    ULONG Length;
+    NTSTATUS Result;
+
+    RtlInitUnicodeString(&Path, L"\\Registry\\Machine\\SECURITY\\Policy\\PolAcDmS");
+    RtlZeroMemory(&Name, sizeof Name);
+    Length = sizeof Value;
+    Result = FspRegistryGetValue(&Path, &Name, &Value.V, &Length);
+    if (NT_SUCCESS(Result) && REG_NONE == Value.V.Type &&
+        sizeof(SID) <= Value.V.DataLength && RtlValidSid((PSID)&Value.V.Data))
+    {
+        RtlCopyMemory(&FspAccountDomainSidBuf.V, &Value.V.Data, Value.V.DataLength);
+        FspAccountDomainSid = &FspAccountDomainSidBuf.V;
+    }
+
+    RtlInitUnicodeString(&Path, L"\\Registry\\Machine\\SECURITY\\Policy\\PolPrDmS");
+    RtlZeroMemory(&Name, sizeof Name);
+    Length = sizeof Value;
+    Result = FspRegistryGetValue(&Path, &Name, &Value.V, &Length);
+    if (NT_SUCCESS(Result) && REG_NONE == Value.V.Type &&
+        sizeof(SID) <= Value.V.DataLength && RtlValidSid((PSID)&Value.V.Data))
+    {
+        RtlCopyMemory(&FspPrimaryDomainSidBuf.V, &Value.V.Data, Value.V.DataLength);
+        FspPrimaryDomainSid = &FspPrimaryDomainSidBuf.V;
+    }
+
+    return TRUE;
+}
+#endif
+
+static inline BOOLEAN FspPosixIsRelativeSid(PISID Sid1, PISID Sid2)
+{
+    if (Sid1->Revision != Sid2->Revision)
+        return FALSE;
+    if (Sid1->IdentifierAuthority.Value[0] != Sid2->IdentifierAuthority.Value[0] ||
+        Sid1->IdentifierAuthority.Value[1] != Sid2->IdentifierAuthority.Value[1] ||
+        Sid1->IdentifierAuthority.Value[2] != Sid2->IdentifierAuthority.Value[2] ||
+        Sid1->IdentifierAuthority.Value[3] != Sid2->IdentifierAuthority.Value[3] ||
+        Sid1->IdentifierAuthority.Value[4] != Sid2->IdentifierAuthority.Value[4] ||
+        Sid1->IdentifierAuthority.Value[5] != Sid2->IdentifierAuthority.Value[5])
+        return FALSE;
+    if (Sid1->SubAuthorityCount + 1 != Sid2->SubAuthorityCount)
+        return FALSE;
+    for (ULONG I = 0; Sid1->SubAuthorityCount > I; I++)
+        if (Sid1->SubAuthority[I] != Sid2->SubAuthority[I])
+            return FALSE;
+    return TRUE;
+}
 
 FSP_API NTSTATUS FspPosixMapUidToSid(UINT32 Uid, PSID *PSid)
 {
+    FSP_KU_CODE;
+
     InitOnceExecuteOnce(&FspPosixInitOnce, FspPosixInitialize, 0, 0);
 
     *PSid = 0;
@@ -221,7 +347,7 @@ FSP_API NTSTATUS FspPosixMapUidToSid(UINT32 Uid, PSID *PSid)
      *     S-1-X-Y                             <=> uid/gid: 0x10000 + 0x100 * X + Y
      */
     else if (0x10000 <= Uid && Uid < 0x11000)
-        *PSid = FspPosixCreateSid((Uid - 0x10000) >> 8, 1, (Uid - 0x10000) & 0xff);
+        *PSid = FspPosixCreateSid((BYTE)((Uid - 0x10000) >> 8), 1, (Uid - 0x10000) & 0xff);
 
     /* [IDMAP]
      * Other well-known SIDs in the NT_AUTHORITY domain (S-1-5-X-RID):
@@ -238,13 +364,15 @@ FSP_API NTSTATUS FspPosixMapUidToSid(UINT32 Uid, PSID *PSid)
 
 FSP_API NTSTATUS FspPosixMapSidToUid(PSID Sid, PUINT32 PUid)
 {
+    FSP_KU_CODE;
+
     InitOnceExecuteOnce(&FspPosixInitOnce, FspPosixInitialize, 0, 0);
 
     BYTE Authority;
     BYTE Count;
     UINT32 SubAuthority0, Rid;
 
-    *PUid = -1;
+    *PUid = (UINT32)-1;
 
     if (!IsValidSid(Sid) || 0 == (Count = *GetSidSubAuthorityCount(Sid)))
         return STATUS_INVALID_SID;
@@ -298,12 +426,11 @@ FSP_API NTSTATUS FspPosixMapSidToUid(PSID Sid, PUINT32 PUid)
              * has PrimaryDomainSid == AccountDomainSid.
              */
 
-            BOOL EqualDomains = FALSE;
             if (0 != FspPrimaryDomainSid &&
-                EqualDomainSid(FspPrimaryDomainSid, Sid, &EqualDomains) && EqualDomains)
+                FspPosixIsRelativeSid(FspPrimaryDomainSid, Sid))
                 *PUid = 0x100000 + Rid;
             else if (0 != FspAccountDomainSid &&
-                EqualDomainSid(FspAccountDomainSid, Sid, &EqualDomains) && EqualDomains)
+                FspPosixIsRelativeSid(FspAccountDomainSid, Sid))
                 *PUid = 0x30000 + Rid;
 
             /*
@@ -348,6 +475,8 @@ FSP_API NTSTATUS FspPosixMapSidToUid(PSID Sid, PUINT32 PUid)
 
 static PISID FspPosixCreateSid(BYTE Authority, ULONG Count, ...)
 {
+    FSP_KU_CODE;
+
     PISID Sid;
     SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
     va_list ap;
@@ -370,6 +499,8 @@ static PISID FspPosixCreateSid(BYTE Authority, ULONG Count, ...)
 
 FSP_API VOID FspDeleteSid(PSID Sid, NTSTATUS (*CreateFunc)())
 {
+    FSP_KU_CODE;
+
     if (FspUnmappedSid == Sid)
         ;
     else if ((NTSTATUS (*)())FspPosixMapUidToSid == CreateFunc)
@@ -439,7 +570,9 @@ FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
     UINT32 Uid, UINT32 Gid, UINT32 Mode,
     PSECURITY_DESCRIPTOR *PSecurityDescriptor)
 {
-    PSID OwnerSid = 0, GroupSid = 0, WorldSid = 0;
+    FSP_KU_CODE;
+
+    PSID OwnerSid = 0, GroupSid = 0;
     UINT32 OwnerPerm, OwnerDeny, GroupPerm, GroupDeny, WorldPerm;
     PACL Acl = 0;
     SECURITY_DESCRIPTOR SecurityDescriptor;
@@ -457,13 +590,6 @@ FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
     if (!NT_SUCCESS(Result))
         goto exit;
 
-    WorldSid = FspWksidGet(WinWorldSid);
-    if (0 == WorldSid)
-    {
-        Result = STATUS_INSUFFICIENT_RESOURCES;
-        goto exit;
-    }
-
     OwnerPerm = (Mode & 0700) >> 6;
     GroupPerm = (Mode & 0070) >> 3;
     WorldPerm = (Mode & 0007);
@@ -502,7 +628,7 @@ FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
         sizeof(ACCESS_DENIED_ACE) * (!!OwnerDeny + !!GroupDeny);
     Size += GetLengthSid(OwnerSid) - sizeof(DWORD);
     Size += GetLengthSid(GroupSid) - sizeof(DWORD);
-    Size += GetLengthSid(WorldSid) - sizeof(DWORD);
+    Size += GetLengthSid(FspWorldSid) - sizeof(DWORD);
     if (OwnerDeny)
         Size += GetLengthSid(OwnerSid) - sizeof(DWORD);
     if (GroupDeny)
@@ -546,7 +672,7 @@ FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
 
     if (!AddAccessAllowedAce(Acl, ACL_REVISION,
         FspPosixDefaultPerm | FspPosixMapPermissionToAccessMask(Mode, WorldPerm),
-        WorldSid))
+        FspWorldSid))
         goto lasterror;
 
     if (!InitializeSecurityDescriptor(&SecurityDescriptor, SECURITY_DESCRIPTOR_REVISION))
@@ -621,7 +747,9 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
     PSECURITY_DESCRIPTOR SecurityDescriptor,
     PUINT32 PUid, PUINT32 PGid, PUINT32 PMode)
 {
-    PSID OwnerSid = 0, GroupSid = 0, WorldSid = 0, AuthUsersSid = 0;
+    FSP_KU_CODE;
+
+    PSID OwnerSid = 0, GroupSid = 0;
     BOOL Defaulted, DaclPresent;
     PACL Acl = 0;
     ACL_SIZE_INFORMATION AclSizeInfo;
@@ -653,20 +781,6 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
 
     if (0 != Acl)
     {
-        WorldSid = FspWksidGet(WinWorldSid);
-        if (0 == WorldSid)
-        {
-            Result = STATUS_INSUFFICIENT_RESOURCES;
-            goto exit;
-        }
-
-        AuthUsersSid = FspWksidGet(WinAuthenticatedUserSid);
-        if (0 == AuthUsersSid)
-        {
-            Result = STATUS_INSUFFICIENT_RESOURCES;
-            goto exit;
-        }
-
         OwnerAllow = OwnerDeny = GroupAllow = GroupDeny = WorldAllow = WorldDeny = 0;
 
         if (!GetAclInformation(Acl, &AclSizeInfo, sizeof AclSizeInfo, AclSizeInformation))
@@ -701,7 +815,7 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
              * add the allowed or denied access right bits into the "owner", "group"
              * and "other" collections.
              */
-            if (EqualSid(WorldSid, AceSid) || EqualSid(AuthUsersSid, AceSid))
+            if (EqualSid(FspWorldSid, AceSid) || EqualSid(FspAuthUsersSid, AceSid))
             {
                 /* [PERMS]
                  * If this is an access-denied ACE, then add each access right to the set
@@ -812,6 +926,8 @@ static UINT32 FspPosixInvalidPathChars[4] =
 FSP_API NTSTATUS FspPosixMapWindowsToPosixPathEx(PWSTR WindowsPath, char **PPosixPath,
     BOOLEAN Translate)
 {
+    FSP_KU_CODE;
+
     NTSTATUS Result;
     ULONG Size;
     char *PosixPath = 0, *p, *q;
@@ -874,6 +990,8 @@ lasterror:
 FSP_API NTSTATUS FspPosixMapPosixToWindowsPathEx(const char *PosixPath, PWSTR *PWindowsPath,
     BOOLEAN Translate)
 {
+    FSP_KU_CODE;
+
     NTSTATUS Result;
     ULONG Size;
     PWSTR WindowsPath = 0, p;
@@ -925,11 +1043,15 @@ lasterror:
 
 FSP_API VOID FspPosixDeletePath(void *Path)
 {
+    FSP_KU_CODE;
+
     MemFree(Path);
 }
 
 FSP_API VOID FspPosixEncodeWindowsPath(PWSTR WindowsPath, ULONG Size)
 {
+    FSP_KU_CODE;
+
     for (PWSTR p = WindowsPath, endp = p + Size; endp > p; p++)
     {
         WCHAR c = *p;
@@ -944,6 +1066,8 @@ FSP_API VOID FspPosixEncodeWindowsPath(PWSTR WindowsPath, ULONG Size)
 
 FSP_API VOID FspPosixDecodeWindowsPath(PWSTR WindowsPath, ULONG Size)
 {
+    FSP_KU_CODE;
+
     for (PWSTR p = WindowsPath, endp = p + Size; endp > p; p++)
     {
         WCHAR c = *p;

src/ku/uuid5.c

@@ -0,0 +1,134 @@
+/**
+ * @file dll/uuid5.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <ku/library.h>
+#include <bcrypt.h>
+
+/*
+ * This module is used to create UUID v5 identifiers. UUID v5 identifiers
+ * are effectively SHA1 hashes that are modified to fit within the UUID
+ * format. The resulting identifiers use version 5 and variant 2. The hash
+ * is taken over the concatenation of a namespace ID and a name; the namespace
+ * ID is another UUID and the name can be any string of bytes ("octets").
+ *
+ * For details see RFC 4122: https://tools.ietf.org/html/rfc4122
+ */
+
+NTSTATUS FspUuid5Make(const UUID *Namespace, const VOID *Buffer, ULONG Size, UUID *Uuid)
+{
+    BCRYPT_ALG_HANDLE ProvHandle = 0;
+    BCRYPT_HASH_HANDLE HashHandle = 0;
+    UINT8 Temp[20];
+    NTSTATUS Result;
+
+    /*
+     * Windows UUID's are encoded in little-endian format. RFC 4122 specifies that for
+     * UUID v5 computation, UUID's must be converted to/from big-endian.
+     *
+     * Note that Windows is always little-endian:
+     * https://community.osr.com/discussion/comment/146810/#Comment_146810
+     */
+
+    /* copy Namespace to local buffer in network byte order (big-endian) */
+    Temp[ 0] = ((PUINT8)Namespace)[ 3];
+    Temp[ 1] = ((PUINT8)Namespace)[ 2];
+    Temp[ 2] = ((PUINT8)Namespace)[ 1];
+    Temp[ 3] = ((PUINT8)Namespace)[ 0];
+    Temp[ 4] = ((PUINT8)Namespace)[ 5];
+    Temp[ 5] = ((PUINT8)Namespace)[ 4];
+    Temp[ 6] = ((PUINT8)Namespace)[ 7];
+    Temp[ 7] = ((PUINT8)Namespace)[ 6];
+    Temp[ 8] = ((PUINT8)Namespace)[ 8];
+    Temp[ 9] = ((PUINT8)Namespace)[ 9];
+    Temp[10] = ((PUINT8)Namespace)[10];
+    Temp[11] = ((PUINT8)Namespace)[11];
+    Temp[12] = ((PUINT8)Namespace)[12];
+    Temp[13] = ((PUINT8)Namespace)[13];
+    Temp[14] = ((PUINT8)Namespace)[14];
+    Temp[15] = ((PUINT8)Namespace)[15];
+
+    /*
+     * Unfortunately we cannot reuse the hashing object, because BCRYPT_HASH_REUSABLE_FLAG
+     * is available in Windows 8 and later. (WinFsp currently supports Windows 7 or later).
+     */
+
+    Result = BCryptOpenAlgorithmProvider(&ProvHandle, BCRYPT_SHA1_ALGORITHM, 0, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = BCryptCreateHash(ProvHandle, &HashHandle, 0, 0, 0, 0, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = BCryptHashData(HashHandle, (PVOID)Temp, 16, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = BCryptHashData(HashHandle, (PVOID)Buffer, Size, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = BCryptFinishHash(HashHandle, Temp, 20, 0);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* copy local buffer to Uuid in host byte order (little-endian) */
+    ((PUINT8)Uuid)[ 0] = Temp[ 3];
+    ((PUINT8)Uuid)[ 1] = Temp[ 2];
+    ((PUINT8)Uuid)[ 2] = Temp[ 1];
+    ((PUINT8)Uuid)[ 3] = Temp[ 0];
+    ((PUINT8)Uuid)[ 4] = Temp[ 5];
+    ((PUINT8)Uuid)[ 5] = Temp[ 4];
+    ((PUINT8)Uuid)[ 6] = Temp[ 7];
+    ((PUINT8)Uuid)[ 7] = Temp[ 6];
+    ((PUINT8)Uuid)[ 8] = Temp[ 8];
+    ((PUINT8)Uuid)[ 9] = Temp[ 9];
+    ((PUINT8)Uuid)[10] = Temp[10];
+    ((PUINT8)Uuid)[11] = Temp[11];
+    ((PUINT8)Uuid)[12] = Temp[12];
+    ((PUINT8)Uuid)[13] = Temp[13];
+    ((PUINT8)Uuid)[14] = Temp[14];
+    ((PUINT8)Uuid)[15] = Temp[15];
+
+    /* [RFC 4122 Section 4.3]
+     * Set the four most significant bits (bits 12 through 15) of the
+     * time_hi_and_version field to the appropriate 4-bit version number
+     * from Section 4.1.3.
+     */
+    Uuid->Data3 = (5 << 12) | (Uuid->Data3 & 0x0fff);
+
+    /* [RFC 4122 Section 4.3]
+     * Set the two most significant bits (bits 6 and 7) of the
+     * clock_seq_hi_and_reserved to zero and one, respectively.
+     */
+    Uuid->Data4[0] = (2 << 6) | (Uuid->Data4[0] & 0x3f);
+
+    Result = STATUS_SUCCESS;
+
+exit:
+    if (0 != HashHandle)
+        BCryptDestroyHash(HashHandle);
+
+    if (0 != ProvHandle)
+        BCryptCloseAlgorithmProvider(ProvHandle, 0);
+
+    return Result;
+}

src/launcher/launcher.c

@@ -503,24 +503,19 @@ static SVC_INSTANCE *SvcInstanceLookup(PWSTR ClassName, PWSTR InstanceName)
     return 0;
 }
 
-static ULONG SvcInstanceArgumentLength(PWSTR Arg)
+static inline ULONG SvcInstanceArgumentLength(PWSTR Arg, PWSTR Pattern)
 {
-    ULONG Length;
+    PWSTR PathTransform(PWSTR Dest, PWSTR Arg, PWSTR Pattern);
 
-    Length = 2; /* for beginning and ending quotes */
-    for (PWSTR P = Arg; *P; P++)
-        if (L'"' != *P)
-            Length++;
-
-    return Length;
+    return 2 + (ULONG)(UINT_PTR)PathTransform(0, Arg, Pattern);
 }
 
-static PWSTR SvcInstanceArgumentCopy(PWSTR Dest, PWSTR Arg)
+static inline PWSTR SvcInstanceArgumentCopy(PWSTR Dest, PWSTR Arg, PWSTR Pattern)
 {
+    PWSTR PathTransform(PWSTR Dest, PWSTR Arg, PWSTR Pattern);
+
     *Dest++ = L'"';
-    for (PWSTR P = Arg; *P; P++)
-        if (L'"' != *P)
-            *Dest++ = *P;
+    Dest = PathTransform(Dest, Arg, Pattern);
     *Dest++ = L'"';
 
     return Dest;
@@ -532,6 +527,7 @@ static NTSTATUS SvcInstanceReplaceArguments(PWSTR String, ULONG Argc, PWSTR *Arg
     PWSTR NewString = 0, P, Q;
     PWSTR EmptyArg = L"";
     ULONG Length;
+    PWSTR Pattern;
 
     *PNewString = 0;
 
@@ -541,24 +537,36 @@ static NTSTATUS SvcInstanceReplaceArguments(PWSTR String, ULONG Argc, PWSTR *Arg
         switch (*P)
         {
         case L'%':
+            Pattern = 0;
             P++;
+            if (L'\\' == *P)
+            {
+                Pattern = ++P;
+                while (!(L'\0' == *P ||
+                    (L'0' <= *P && *P <= '9') ||
+                    (L'A' <= *P && *P <= 'Z')))
+                    P++;
+            }
             if (L'0' <= *P && *P <= '9')
             {
                 if (Argc > (ULONG)(*P - L'0'))
-                    Length += SvcInstanceArgumentLength(Argv[*P - L'0']);
+                    Length += SvcInstanceArgumentLength(Argv[*P - L'0'], Pattern);
                 else
-                    Length += SvcInstanceArgumentLength(EmptyArg);
+                    Length += SvcInstanceArgumentLength(EmptyArg, 0);
             }
             else
             if (L'U' == *P)
             {
                 if (0 != SvcInstanceUserName())
-                    Length += SvcInstanceArgumentLength(SvcInstanceUserName());
+                    Length += SvcInstanceArgumentLength(SvcInstanceUserName(), Pattern);
                 else
-                    Length += SvcInstanceArgumentLength(EmptyArg);
+                    Length += SvcInstanceArgumentLength(EmptyArg, 0);
             }
             else
+            if (*P)
                 Length++;
+            else
+                P--;
             break;
         default:
             Length++;
@@ -575,24 +583,36 @@ static NTSTATUS SvcInstanceReplaceArguments(PWSTR String, ULONG Argc, PWSTR *Arg
         switch (*P)
         {
         case L'%':
+            Pattern = 0;
             P++;
+            if (L'\\' == *P)
+            {
+                Pattern = ++P;
+                while (!(L'\0' == *P ||
+                    (L'0' <= *P && *P <= '9') ||
+                    (L'A' <= *P && *P <= 'Z')))
+                    P++;
+            }
             if (L'0' <= *P && *P <= '9')
             {
                 if (Argc > (ULONG)(*P - L'0'))
-                    Q = SvcInstanceArgumentCopy(Q, Argv[*P - L'0']);
+                    Q = SvcInstanceArgumentCopy(Q, Argv[*P - L'0'], Pattern);
                 else
-                    Q = SvcInstanceArgumentCopy(Q, EmptyArg);
+                    Q = SvcInstanceArgumentCopy(Q, EmptyArg, 0);
             }
             else
             if (L'U' == *P)
             {
                 if (0 != SvcInstanceUserName())
-                    Q = SvcInstanceArgumentCopy(Q, SvcInstanceUserName());
+                    Q = SvcInstanceArgumentCopy(Q, SvcInstanceUserName(), Pattern);
                 else
-                    Q = SvcInstanceArgumentCopy(Q, EmptyArg);
+                    Q = SvcInstanceArgumentCopy(Q, EmptyArg, 0);
             }
             else
+            if (*P)
                 *Q++ = *P;
+            else
+                P--;
             break;
         default:
             *Q++ = *P;

src/launcher/ptrans.c

@@ -0,0 +1,182 @@
+/**
+ * @file launcher/ptrans.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+/**
+ * Path Transformation Language
+ *
+ * Syntax:
+ *     PERCENT BACKLASH replace-sep *(*sep component) [*sep UNDERSCORE] arg
+ *
+ * Arg:
+ *     The command line argument that a rule is applied on. These are denoted
+ *     by digits [0-9] or a capital letter (A-Z).
+ *
+ * Component:
+ *     A path component denoted by a small letter (a-z). The letter a denotes
+ *     the first path component, the letter b the second path component, etc.
+ *
+ * UNDERSCORE:
+ *     The UNDERSCORE (_) denotes the "rest of the path". This is any path
+ *     left after any path components explicitly mentioned by using small
+ *     letters (a-z).
+ *
+ * Sep:
+ *     A separator symbol that is used to separated components.
+ *     E.g. slash (/), colon (:), etc.
+ *
+ * Replace-sep:
+ *     A separator symbol that replaces the backslash (\) separator in the
+ *     "rest of the path" (UNDERSCORE). E.g. slash (/), colon (:), etc.
+ *
+ *
+ * Examples:
+ *     - %\/b:_1
+ *         - Transforms \rclone\REMOTE\PATH\TO\FILES to REMOTE:PATH/TO/FILES
+ *     - %\/b:/_1
+ *         - Transforms \rclone\REMOTE\PATH\TO\FILES to REMOTE:/PATH/TO/FILES
+ *     - %\/_1
+ *         - Transforms \P1\P2\P3 to /P1/P2/P3
+ *     - %\+_1
+ *         - Transforms \P1\P2\P3 to +P1+P2+P3
+ *     - %\\_1
+ *         - Transforms \P1\P2\P3 to \\P1\\P2\\P3
+ *         (Backslash is doubled up when used as a replacement separator!)
+ */
+
+#include <winfsp/launch.h>
+#include <shared/minimal.h>
+
+static PWSTR PathCopy(PWSTR Dest, PWSTR Arg, PWSTR ArgEnd, BOOLEAN WriteDest, WCHAR Replacement)
+{
+    if (0 != Replacement)
+    {
+        for (PWSTR P = Arg, EndP = (0 != ArgEnd ? ArgEnd : (PWSTR)(UINT_PTR)~0); EndP > P && *P; P++)
+            if (L'\\' == *P)
+            {
+                if (L'\\' == Replacement)
+                {
+                    if (WriteDest)
+                        *Dest = Replacement;
+                    Dest++;
+                }
+
+                if (WriteDest)
+                    *Dest = Replacement;
+                Dest++;
+            }
+            else if (L'"' != *P)
+            {
+                if (WriteDest)
+                    *Dest = *P;
+                Dest++;
+            }
+    }
+    else
+    {
+        for (PWSTR P = Arg, EndP = (0 != ArgEnd ? ArgEnd : (PWSTR)(UINT_PTR)~0); EndP > P && *P; P++)
+            if (L'"' != *P)
+            {
+                if (WriteDest)
+                    *Dest = *P;
+                Dest++;
+            }
+    }
+
+    return Dest;
+}
+
+static inline BOOLEAN PatternEnd(WCHAR C)
+{
+    return L'\0' == C ||
+        (L'0' <= C && C <= '9') ||
+        (L'A' <= C && C <= 'Z');
+}
+
+PWSTR PathTransform(PWSTR Dest, PWSTR Arg, PWSTR Pattern)
+{
+    BOOLEAN WriteDest = 0 != Dest;
+    WCHAR Replacement;
+    PWSTR Components[26][2];
+    PWSTR Remainder = Arg;
+    ULONG RemainderIndex = 0;
+    PWSTR P;
+
+    if (0 == Pattern)
+        return PathCopy(Dest, Arg, 0, WriteDest, 0);
+
+    for (ULONG I = 0; 26 > I; I++)
+        Components[I][0] = 0;
+
+    Replacement = *Pattern++;
+    if (PatternEnd(Replacement))
+        return Dest;
+
+    while (!PatternEnd(*Pattern))
+    {
+        if (L'a' <= *Pattern && *Pattern <= 'z')
+        {
+            ULONG I = *Pattern - 'a', J;
+            if (0 == Components[I][0])
+            {
+                P = Remainder;
+                J = RemainderIndex;
+
+                while (L'\\' == *P)
+                    P++;
+
+                for (;;)
+                {
+                    Components[J][0] = P;
+                    while (*P && L'\\' != *P)
+                        P++;
+                    Components[J][1] = P;
+
+                    while (L'\\' == *P)
+                        P++;
+
+                    if (I == J)
+                    {
+                        Remainder = P;
+                        RemainderIndex = I + 1;
+                        break;
+                    }
+
+                    J++;
+                }
+            }
+
+            Dest = PathCopy(Dest, Components[I][0], Components[I][1], WriteDest, Replacement);
+        }
+        else
+        if (L'_' == *Pattern)
+            Dest = PathCopy(Dest, Remainder, 0, WriteDest, Replacement);
+        else
+        {
+            if (WriteDest)
+                *Dest = *Pattern;
+            Dest++;
+        }
+
+        Pattern++;
+    }
+
+    return Dest;
+}

src/shared/minimal.h

@@ -72,6 +72,10 @@ NTSYSAPI VOID NTAPI RtlMoveMemory(VOID *Destination, CONST VOID *Source, DWORD L
 
 #pragma function(memset)
 #pragma function(memcpy)
+#pragma warning(push)
+#pragma warning(disable:4163)           /* not available as an intrinsic function */
+#pragma function(memmove)
+#pragma warning(pop)
 static inline
 void *memset(void *dst, int val, size_t siz)
 {

src/sys/create.c

@@ -29,7 +29,7 @@ static NTSTATUS FspFsvolCreate(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 static NTSTATUS FspFsvolCreateNoLock(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
-    BOOLEAN MainFileOpen);
+    BOOLEAN MainFileOpen, PFSP_ATOMIC_CREATE_ECP_CONTEXT AtomicCreateEcp);
 FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
 FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
 static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response,
@@ -144,6 +144,7 @@ static NTSTATUS FspFsvolCreate(
     PECP_LIST ExtraCreateParameters;
     PVOID ExtraCreateParameter;
     BOOLEAN MainFileOpen = FALSE;
+    PFSP_ATOMIC_CREATE_ECP_CONTEXT AtomicCreateEcp = 0;
 
     /*
      * Check if the IRP has ECP's.
@@ -219,6 +220,21 @@ static NTSTATUS FspFsvolCreate(
             }
         }
 #endif
+
+        if (FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.WslFeatures)
+        {
+            // {4720bd83-52ac-4104-a130-d1ec6a8cc8e5}
+            static const GUID FspAtomicCreateEcpGuid =
+                { 0x4720bd83, 0x52ac, 0x4104, { 0xa1, 0x30, 0xd1, 0xec, 0x6a, 0x8c, 0xc8, 0xe5 } };
+
+            ExtraCreateParameter = 0;
+            AtomicCreateEcp =
+                NT_SUCCESS(FsRtlFindExtraCreateParameter(ExtraCreateParameters,
+                    &FspAtomicCreateEcpGuid, &ExtraCreateParameter, 0)) &&
+                0 != ExtraCreateParameter &&
+                !FsRtlIsEcpFromUserMode(ExtraCreateParameter) ?
+                    ExtraCreateParameter : 0;
+        }
     }
 
     if (!MainFileOpen)
@@ -226,7 +242,8 @@ static NTSTATUS FspFsvolCreate(
         FspFsvolDeviceFileRenameAcquireShared(FsvolDeviceObject);
         try
         {
-            Result = FspFsvolCreateNoLock(FsvolDeviceObject, Irp, IrpSp, FALSE);
+            Result = FspFsvolCreateNoLock(FsvolDeviceObject, Irp, IrpSp,
+                MainFileOpen, AtomicCreateEcp);
         }
         finally
         {
@@ -235,14 +252,15 @@ static NTSTATUS FspFsvolCreate(
         }
     }
     else
-        Result = FspFsvolCreateNoLock(FsvolDeviceObject, Irp, IrpSp, TRUE);
+        Result = FspFsvolCreateNoLock(FsvolDeviceObject, Irp, IrpSp,
+            MainFileOpen, AtomicCreateEcp);
 
     return Result;
 }
 
 static NTSTATUS FspFsvolCreateNoLock(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
-    BOOLEAN MainFileOpen)
+    BOOLEAN MainFileOpen, PFSP_ATOMIC_CREATE_ECP_CONTEXT AtomicCreateEcp)
 {
     PAGED_CODE();
 
@@ -279,6 +297,8 @@ static NTSTATUS FspFsvolCreateNoLock(
     USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
     PFILE_FULL_EA_INFORMATION EaBuffer = Irp->AssociatedIrp.SystemBuffer;
     ULONG EaLength = IrpSp->Parameters.Create.EaLength;
+    PVOID ExtraBuffer = 0;
+    ULONG ExtraLength = 0;
     ULONG Flags = IrpSp->Flags;
     KPROCESSOR_MODE RequestorMode =
         FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
@@ -292,6 +312,7 @@ static NTSTATUS FspFsvolCreateNoLock(
     BOOLEAN HasRestorePrivilege =
         BooleanFlagOn(AccessState->Flags, TOKEN_HAS_RESTORE_PRIVILEGE);
     BOOLEAN HasTrailingBackslash = FALSE;
+    BOOLEAN EaIsReparsePoint = FALSE;
     FSP_FILE_NODE *FileNode, *RelatedFileNode;
     FSP_FILE_DESC *FileDesc;
     UNICODE_STRING MainFileName = { 0 }, StreamPart = { 0 };
@@ -302,6 +323,36 @@ static NTSTATUS FspFsvolCreateNoLock(
     if (FlagOn(CreateOptions, FILE_OPEN_BY_FILE_ID))
         return STATUS_NOT_IMPLEMENTED;
 
+    /* is there an AtomicCreateEcp attached? */
+    if (0 != AtomicCreateEcp)
+    {
+        if ((FILE_CREATE != CreateDisposition && FILE_OPEN_IF != CreateDisposition) ||
+            0 != EaBuffer ||
+            RTL_SIZEOF_THROUGH_FIELD(FSP_ATOMIC_CREATE_ECP_CONTEXT, ReparseBuffer) >
+                AtomicCreateEcp->Size ||
+            /* !!!: revisit: FlagOn*/
+            !FlagOn(AtomicCreateEcp->InFlags,
+                ATOMIC_CREATE_ECP_IN_FLAG_BEST_EFFORT |
+                ATOMIC_CREATE_ECP_IN_FLAG_REPARSE_POINT_SPECIFIED))
+            return STATUS_INVALID_PARAMETER; /* docs do not say what to return on failure! */
+
+        if (FlagOn(AtomicCreateEcp->InFlags,
+            ATOMIC_CREATE_ECP_IN_FLAG_REPARSE_POINT_SPECIFIED))
+        {
+            Result = FsRtlValidateReparsePointBuffer(AtomicCreateEcp->ReparseBufferLength,
+                AtomicCreateEcp->ReparseBuffer);
+            if (!NT_SUCCESS(Result))
+                return Result;
+
+            /* mark that we satisfied the reparse point request, although we may fail it later! */
+            AtomicCreateEcp->OutFlags = ATOMIC_CREATE_ECP_OUT_FLAG_REPARSE_POINT_SET;
+
+            ExtraBuffer = AtomicCreateEcp->ReparseBuffer;
+            ExtraLength = AtomicCreateEcp->ReparseBufferLength;
+            EaIsReparsePoint = TRUE;
+        }
+    }
+
     /* was an EA buffer specified? */
     if (0 != EaBuffer)
     {
@@ -318,6 +369,9 @@ static NTSTATUS FspFsvolCreateNoLock(
             EaBuffer, EaLength, (PULONG)&Irp->IoStatus.Information);
         if (!NT_SUCCESS(Result))
             return Result;
+
+        ExtraBuffer = EaBuffer;
+        ExtraLength = EaLength;
     }
 
     /* cannot open a paging file */
@@ -555,9 +609,9 @@ static NTSTATUS FspFsvolCreateNoLock(
         SecurityDescriptorSize = 0;
         FileAttributes = 0;
 
-        /* cannot set EA on named stream */
-        EaBuffer = 0;
-        EaLength = 0;
+        /* cannot set extra buffer on named stream */
+        ExtraBuffer = 0;
+        ExtraLength = 0;
 
         /* remember the main file node */
         ASSERT(0 == FileNode->MainFileNode);
@@ -577,8 +631,8 @@ static NTSTATUS FspFsvolCreateNoLock(
 
     /* create the user-mode file system request */
     Result = FspIopCreateRequestEx(Irp, &FileNode->FileName,
-        0 != EaBuffer ?
-            FSP_FSCTL_DEFAULT_ALIGN_UP(SecurityDescriptorSize) + EaLength : SecurityDescriptorSize,
+        0 != ExtraBuffer ?
+            FSP_FSCTL_DEFAULT_ALIGN_UP(SecurityDescriptorSize) + ExtraLength : SecurityDescriptorSize,
         FspFsvolCreateRequestFini, &Request);
     if (!NT_SUCCESS(Result))
     {
@@ -616,10 +670,10 @@ static NTSTATUS FspFsvolCreateNoLock(
     Request->Req.Create.DesiredAccess = DesiredAccess;
     Request->Req.Create.GrantedAccess = GrantedAccess;
     Request->Req.Create.ShareAccess = ShareAccess;
-    Request->Req.Create.Ea.Offset = 0 != EaBuffer ?
+    Request->Req.Create.Ea.Offset = 0 != ExtraBuffer ?
         (0 != Request->Req.Create.SecurityDescriptor.Offset ?
             NEXTOFS(Request->Req.Create.SecurityDescriptor) : NEXTOFS(Request->FileName)) : 0;
-    Request->Req.Create.Ea.Size = 0 != EaBuffer ? (UINT16)EaLength : 0;
+    Request->Req.Create.Ea.Size = 0 != ExtraBuffer ? (UINT16)ExtraLength : 0;
     Request->Req.Create.UserMode = UserMode == RequestorMode;
     Request->Req.Create.HasTraversePrivilege = HasTraversePrivilege;
     Request->Req.Create.HasBackupPrivilege = HasBackupPrivilege;
@@ -628,10 +682,10 @@ static NTSTATUS FspFsvolCreateNoLock(
     Request->Req.Create.CaseSensitive = CaseSensitive;
     Request->Req.Create.HasTrailingBackslash = HasTrailingBackslash;
     Request->Req.Create.NamedStream = MainFileName.Length;
-#undef NEXTOFS
-
     Request->Req.Create.AcceptsSecurityDescriptor = 0 == Request->Req.Create.NamedStream &&
         !!FsvolDeviceExtension->VolumeParams.AllowOpenInKernelMode;
+    Request->Req.Create.EaIsReparsePoint = EaIsReparsePoint;
+#undef NEXTOFS
 
     ASSERT(
         0 == StreamPart.Length && 0 == MainFileName.Length ||
@@ -642,10 +696,10 @@ static NTSTATUS FspFsvolCreateNoLock(
         RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset,
             SecurityDescriptor, SecurityDescriptorSize);
 
-    /* copy the EA buffer (if any) into the request */
-    if (0 != EaBuffer)
+    /* copy the extra buffer (if any) into the request */
+    if (0 != ExtraBuffer)
         RtlCopyMemory(Request->Buffer + Request->Req.Create.Ea.Offset,
-            EaBuffer, EaLength);
+            ExtraBuffer, ExtraLength);
 
     /* fix FileNode->FileName if we are doing SL_OPEN_TARGET_DIRECTORY */
     if (Request->Req.Create.OpenTargetDirectory)

src/sys/debug.c

@@ -252,6 +252,8 @@ const char *FileInformationClassSym(FILE_INFORMATION_CLASS FileInformationClass)
     SYM(FileReplaceCompletionInformation)
     SYM(FileHardLinkFullIdInformation)
     SYM(FileIdExtdBothDirectoryInformation)
+    case 68: return "FileStatInformation";
+    case 70: return "FileStatLxInformation";
     default:
         return "FILE_INFORMATION_CLASS:Unknown";
     }

src/sys/devctl.c

@@ -23,6 +23,9 @@
 
 static NTSTATUS FspFsvrtDeviceControl(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+static BOOLEAN FspFsvrtDeviceControlStorageQuery(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
+    PNTSTATUS PResult);
 static NTSTATUS FspFsvolDeviceControl(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 FSP_IOCMPL_DISPATCH FspFsvolDeviceControlComplete;
@@ -31,6 +34,7 @@ FSP_DRIVER_DISPATCH FspDeviceControl;
 
 #ifdef ALLOC_PRAGMA
 #pragma alloc_text(PAGE, FspFsvrtDeviceControl)
+#pragma alloc_text(PAGE, FspFsvrtDeviceControlStorageQuery)
 #pragma alloc_text(PAGE, FspFsvolDeviceControl)
 #pragma alloc_text(PAGE, FspFsvolDeviceControlComplete)
 #pragma alloc_text(PAGE, FspFsvolDeviceControlRequestFini)
@@ -43,10 +47,18 @@ enum
 };
 
 static NTSTATUS FspFsvrtDeviceControl(
-    PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {
     PAGED_CODE();
 
+    NTSTATUS Result;
+
+    if (FspFsvrtDeviceControlStorageQuery(FsvrtDeviceObject, Irp, IrpSp, &Result))
+        return Result;
+
+    if (FspMountdevDeviceControl(FsvrtDeviceObject, Irp, IrpSp, &Result))
+        return Result;
+
     /*
      * Fix GitHub issue #177. All credit for the investigation of this issue
      * and the suggested steps to reproduce and work around the problem goes
@@ -64,6 +76,62 @@ static NTSTATUS FspFsvrtDeviceControl(
     return STATUS_UNRECOGNIZED_VOLUME;
 }
 
+static BOOLEAN FspFsvrtDeviceControlStorageQuery(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
+    PNTSTATUS PResult)
+{
+    PAGED_CODE();
+
+    /*
+     * SQL Server insists on sending us storage level IOCTL's even though
+     * WinFsp file systems are not on top of a real disk. So bite the bullet
+     * and implement some of those storage IOCTL's to make SQL Server happy.
+     */
+
+    if (IOCTL_STORAGE_QUERY_PROPERTY != IrpSp->Parameters.DeviceIoControl.IoControlCode ||
+        sizeof(STORAGE_PROPERTY_QUERY) > IrpSp->Parameters.DeviceIoControl.InputBufferLength)
+        return FALSE;
+
+    PSTORAGE_PROPERTY_QUERY Query = Irp->AssociatedIrp.SystemBuffer;
+    switch (Query->PropertyId)
+    {
+    case StorageAccessAlignmentProperty:
+        if (PropertyExistsQuery == Query->QueryType)
+            *PResult = STATUS_SUCCESS;
+        else if (PropertyStandardQuery == Query->QueryType)
+        {
+            FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+            PSTORAGE_ACCESS_ALIGNMENT_DESCRIPTOR Descriptor = Irp->AssociatedIrp.SystemBuffer;
+            ULONG OutputBufferLength = IrpSp->Parameters.DeviceIoControl.OutputBufferLength;
+
+            if (sizeof(STORAGE_DESCRIPTOR_HEADER) > OutputBufferLength)
+                *PResult = STATUS_BUFFER_TOO_SMALL;
+            else if (sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR) > OutputBufferLength)
+            {
+                Descriptor->Version = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+                Descriptor->Size = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+                Irp->IoStatus.Information = sizeof(STORAGE_DESCRIPTOR_HEADER);
+                *PResult = STATUS_SUCCESS;
+            }
+            else
+            {
+                RtlZeroMemory(Descriptor, sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR));
+                Descriptor->Version = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+                Descriptor->Size = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+                Descriptor->BytesPerLogicalSector = FsvrtDeviceExtension->SectorSize;
+                Descriptor->BytesPerPhysicalSector = FsvrtDeviceExtension->SectorSize;
+                Irp->IoStatus.Information = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+                *PResult = STATUS_SUCCESS;
+            }
+        }
+        else
+            *PResult = STATUS_NOT_SUPPORTED;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
 static NTSTATUS FspFsvolDeviceControl(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {
@@ -72,6 +140,15 @@ static NTSTATUS FspFsvolDeviceControl(
     FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
     PFILE_OBJECT FileObject = IrpSp->FileObject;
     ULONG IoControlCode = IrpSp->Parameters.DeviceIoControl.IoControlCode;
+    NTSTATUS Result;
+
+    /*
+     * Possibly forward the IOCTL request to the user mode file system. The rules are:
+     *
+     * - File system must support DeviceControl.
+     * - Only IOCTL with custom devices (see DEVICE_TYPE_FROM_CTL_CODE) and
+     *   METHOD_BUFFERED will be forwarded.
+     */
 
     /* do we support DeviceControl? */
     if (!FsvolDeviceExtension->VolumeParams.DeviceControl)
@@ -90,7 +167,6 @@ static NTSTATUS FspFsvolDeviceControl(
     if (!FspFileNodeIsValid(FileObject->FsContext))
         return STATUS_INVALID_PARAMETER;
 
-    NTSTATUS Result;
     FSP_FILE_NODE *FileNode = FileObject->FsContext;
     FSP_FILE_DESC *FileDesc = FileObject->FsContext2;
     PVOID InputBuffer = Irp->AssociatedIrp.SystemBuffer;

src/sys/device.c

@@ -126,10 +126,12 @@ NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
     case FspFsvolDeviceExtensionKind:
         DeviceExtensionSize = sizeof(FSP_FSVOL_DEVICE_EXTENSION);
         break;
+    case FspFsvrtDeviceExtensionKind:
+        DeviceExtensionSize = sizeof(FSP_FSVRT_DEVICE_EXTENSION);
+        break;
     case FspFsmupDeviceExtensionKind:
         DeviceExtensionSize = sizeof(FSP_FSMUP_DEVICE_EXTENSION);
         break;
-    case FspFsvrtDeviceExtensionKind:
     case FspFsctlDeviceExtensionKind:
         DeviceExtensionSize = sizeof(FSP_DEVICE_EXTENSION);
         break;
@@ -184,10 +186,12 @@ NTSTATUS FspDeviceInitialize(PDEVICE_OBJECT DeviceObject)
     case FspFsvolDeviceExtensionKind:
         Result = FspFsvolDeviceInit(DeviceObject);
         break;
+    case FspFsvrtDeviceExtensionKind:
+        Result = STATUS_SUCCESS;
+        break;
     case FspFsmupDeviceExtensionKind:
         Result = FspFsmupDeviceInit(DeviceObject);
         break;
-    case FspFsvrtDeviceExtensionKind:
     case FspFsctlDeviceExtensionKind:
         Result = STATUS_SUCCESS;
         break;
@@ -213,10 +217,11 @@ VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject)
     case FspFsvolDeviceExtensionKind:
         FspFsvolDeviceFini(DeviceObject);
         break;
+    case FspFsvrtDeviceExtensionKind:
+        break;
     case FspFsmupDeviceExtensionKind:
         FspFsmupDeviceFini(DeviceObject);
         break;
-    case FspFsvrtDeviceExtensionKind:
     case FspFsctlDeviceExtensionKind:
         break;
     default:
@@ -325,6 +330,23 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
      * to track what has been initialized!
      */
 
+    /* initialize any fsext provider */
+    if (0 != FsvolDeviceExtension->VolumeParams.FsextControlCode)
+    {
+        FSP_FSEXT_PROVIDER *Provider = FspFsextProvider(
+            FsvolDeviceExtension->VolumeParams.FsextControlCode, 0);
+        if (0 != Provider)
+        {
+            Result = Provider->DeviceInit(DeviceObject, &FsvolDeviceExtension->VolumeParams);
+            if (!NT_SUCCESS(Result))
+                return Result;
+            FsvolDeviceExtension->Provider = Provider;
+            FsvolDeviceExtension->InitDoneFsext = 1;
+        }
+        else
+            return STATUS_OBJECT_NAME_NOT_FOUND;
+    }
+
     /* is there a virtual disk? */
     if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
     {
@@ -500,6 +522,13 @@ static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject)
         if (0 != FsvolDeviceExtension->SwapVpb)
             FspFreeExternal(FsvolDeviceExtension->SwapVpb);
     }
+
+    /* finalize any fsext provider */
+    if (FsvolDeviceExtension->InitDoneFsext)
+    {
+        if (0 != FsvolDeviceExtension->Provider)
+            FsvolDeviceExtension->Provider->DeviceFini(DeviceObject);
+    }
 }
 
 static VOID FspFsvolDeviceTimerRoutine(PDEVICE_OBJECT DeviceObject, PVOID Context)
@@ -546,6 +575,9 @@ static VOID FspFsvolDeviceExpirationRoutine(PVOID Context)
     FspMetaCacheInvalidateExpired(FsvolDeviceExtension->SecurityCache, InterruptTime);
     FspMetaCacheInvalidateExpired(FsvolDeviceExtension->DirInfoCache, InterruptTime);
     FspMetaCacheInvalidateExpired(FsvolDeviceExtension->StreamInfoCache, InterruptTime);
+    /* run any fsext provider expiration routine */
+    if (0 != FsvolDeviceExtension->Provider)
+        FsvolDeviceExtension->Provider->DeviceExpirationRoutine(DeviceObject, InterruptTime);
     FspIoqRemoveExpired(FsvolDeviceExtension->Ioq, InterruptTime);
 
     KeAcquireSpinLock(&FsvolDeviceExtension->ExpirationLock, &Irql);

src/sys/dirctl.c

@@ -24,6 +24,7 @@
 static NTSTATUS FspFsvolQueryDirectoryCopy(
     PUNICODE_STRING DirectoryPattern, BOOLEAN CaseInsensitive,
     PUNICODE_STRING DirectoryMarker, PUNICODE_STRING DirectoryMarkerOut,
+    PUINT64 DirectoryMarkerAsNextOffset,
     FILE_INFORMATION_CLASS FileInformationClass, BOOLEAN ReturnSingleEntry,
     BOOLEAN ReturnEaSize,
     FSP_FSCTL_DIR_INFO **PDirInfo, ULONG DirInfoSize,
@@ -88,6 +89,7 @@ enum
 static NTSTATUS FspFsvolQueryDirectoryCopy(
     PUNICODE_STRING DirectoryPattern, BOOLEAN CaseInsensitive,
     PUNICODE_STRING DirectoryMarker, PUNICODE_STRING DirectoryMarkerOut,
+    PUINT64 DirectoryMarkerAsNextOffset,
     FILE_INFORMATION_CLASS FileInformationClass, BOOLEAN ReturnSingleEntry,
     BOOLEAN ReturnEaSize,
     FSP_FSCTL_DIR_INFO **PDirInfo, ULONG DirInfoSize,
@@ -130,6 +132,7 @@ static NTSTATUS FspFsvolQueryDirectoryCopy(
     PVOID PrevDestBuf = 0;
     ULONG BaseInfoLen, CopyLength;
     UNICODE_STRING FileName;
+    UINT64 DirectoryNextOffset;
 
     *PDestLen = 0;
 
@@ -176,12 +179,21 @@ static NTSTATUS FspFsvolQueryDirectoryCopy(
             FileName.MaximumLength = (USHORT)(DirInfoSize - sizeof(FSP_FSCTL_DIR_INFO));
             FileName.Buffer = DirInfo->FileNameBuf;
 
+            DirectoryNextOffset = DirInfo->NextOffset;
+
             if (0 != DirectoryMarker && 0 != DirectoryMarker->Buffer &&
                 !DirectoryMarkerFound)
+            {
+                if (0 == DirectoryMarkerAsNextOffset)
                 {
                     DirectoryMarkerFound = 0 == FspFileNameCompare(
                         &FileName, DirectoryMarker, CaseInsensitive, 0);
-                continue;
+                }
+                else
+                {
+                    ASSERT(sizeof(UINT64) == DirectoryMarker->Length);
+                    DirectoryMarkerFound = DirectoryNextOffset == *(PUINT64)DirectoryMarker->Buffer;
+                }
             }
 
             /* CopyLength is the same as FileName.Length except on STATUS_BUFFER_OVERFLOW */
@@ -272,8 +284,17 @@ static NTSTATUS FspFsvolQueryDirectoryCopy(
                     break;
                 }
 
+                if (0 == DirectoryMarkerAsNextOffset)
+                {
                     DirectoryMarkerOut->Length = DirectoryMarkerOut->MaximumLength = FileName.Length;
                     DirectoryMarkerOut->Buffer = (PVOID)((PUINT8)DestBuf + BaseInfoLen);
+                }
+                else
+                {
+                    DirectoryMarkerOut->Length = DirectoryMarkerOut->MaximumLength = sizeof(UINT64);
+                    DirectoryMarkerOut->Buffer = (PVOID)DirectoryMarkerAsNextOffset;
+                    *DirectoryMarkerAsNextOffset = DirectoryNextOffset;
+                }
 
                 DestBuf = (PVOID)((PUINT8)DestBuf +
                     FSP_FSCTL_ALIGN_UP(BaseInfoLen + CopyLength, sizeof(LONGLONG)));
@@ -283,7 +304,16 @@ static NTSTATUS FspFsvolQueryDirectoryCopy(
                     Loop = FALSE;
             }
             else
+            {
+                if (0 == DirectoryMarkerAsNextOffset)
                     *DirectoryMarkerOut = FileName;
+                else
+                {
+                    DirectoryMarkerOut->Length = DirectoryMarkerOut->MaximumLength = sizeof(UINT64);
+                    DirectoryMarkerOut->Buffer = (PVOID)DirectoryMarkerAsNextOffset;
+                    *DirectoryMarkerAsNextOffset = DirectoryNextOffset;
+                }
+            }
         }
     }
     except (EXCEPTION_EXECUTE_HANDLER)
@@ -323,9 +353,12 @@ static NTSTATUS FspFsvolQueryDirectoryCopyCache(
     FileDesc->DirInfo = FileNode->NonPaged->DirInfo;
 
     NTSTATUS Result;
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =
+        FspFsvolDeviceExtension(FileNode->FsvolDeviceObject);
     BOOLEAN CaseInsensitive = !FileDesc->CaseSensitive;
     PUNICODE_STRING DirectoryPattern = &FileDesc->DirectoryPattern;
     UNICODE_STRING DirectoryMarker = FileDesc->DirectoryMarker;
+    UINT64 DirectoryMarkerAsNextOffset = 0;
     PUINT8 DirInfoBgn = (PUINT8)DirInfo;
     PUINT8 DirInfoEnd = (PUINT8)DirInfo + DirInfoSize;
 
@@ -334,8 +367,10 @@ static NTSTATUS FspFsvolQueryDirectoryCopyCache(
 
     Result = FspFsvolQueryDirectoryCopy(DirectoryPattern, CaseInsensitive,
         0 != FileDesc->DirInfoCacheHint ? 0 : &FileDesc->DirectoryMarker, &DirectoryMarker,
+        FsvolDeviceExtension->VolumeParams.DirectoryMarkerAsNextOffset ?
+            &DirectoryMarkerAsNextOffset : 0,
         FileInformationClass, ReturnSingleEntry,
-        !!FspFsvolDeviceExtension(FileNode->FsvolDeviceObject)->VolumeParams.ExtendedAttributes,
+        !!FsvolDeviceExtension->VolumeParams.ExtendedAttributes,
         &DirInfo, DirInfoSize,
         DestBuf, PDestLen);
 
@@ -366,10 +401,13 @@ static NTSTATUS FspFsvolQueryDirectoryCopyInPlace(
     PAGED_CODE();
 
     NTSTATUS Result;
+    FSP_FILE_NODE *FileNode = FileDesc->FileNode;
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =
+        FspFsvolDeviceExtension(FileNode->FsvolDeviceObject);
     BOOLEAN CaseInsensitive = !FileDesc->CaseSensitive;
     PUNICODE_STRING DirectoryPattern = &FileDesc->DirectoryPattern;
     UNICODE_STRING DirectoryMarker = FileDesc->DirectoryMarker;
-    FSP_FILE_NODE *FileNode = FileDesc->FileNode;
+    UINT64 DirectoryMarkerAsNextOffset = 0;
 
     FSP_FSCTL_STATIC_ASSERT(
         FIELD_OFFSET(FSP_FSCTL_DIR_INFO, FileNameBuf) >=
@@ -378,8 +416,10 @@ static NTSTATUS FspFsvolQueryDirectoryCopyInPlace(
 
     Result = FspFsvolQueryDirectoryCopy(DirectoryPattern, CaseInsensitive,
         0, &DirectoryMarker,
+        FsvolDeviceExtension->VolumeParams.DirectoryMarkerAsNextOffset ?
+            &DirectoryMarkerAsNextOffset : 0,
         FileInformationClass, ReturnSingleEntry,
-        !!FspFsvolDeviceExtension(FileNode->FsvolDeviceObject)->VolumeParams.ExtendedAttributes,
+        !!FsvolDeviceExtension->VolumeParams.ExtendedAttributes,
         &DirInfo, DirInfoSize,
         DestBuf, PDestLen);
 

src/sys/driver.h

@@ -26,9 +26,12 @@
 
 #define POOL_NX_OPTIN                   1
 #include <ntifs.h>
+#include <mountdev.h>
+#include <ntddstor.h>
 #include <ntstrsafe.h>
 #include <wdmsec.h>
 #include <winfsp/fsctl.h>
+#include <winfsp/fsext.h>
 
 /* disable warnings */
 #pragma warning(disable:4100)           /* unreferenced formal parameter */
@@ -36,6 +39,12 @@
 
 #define DRIVER_NAME                     FSP_FSCTL_DRIVER_NAME
 
+#if _WIN64
+#define FSP_REGKEY                      "\\Registry\\Machine\\Software\\WOW6432Node\\WinFsp"
+#else
+#define FSP_REGKEY                      "\\Registry\\Machine\\Software\\WinFsp"
+#endif
+
 /* IoCreateDeviceSecure default SDDL's */
 #define FSP_FSCTL_DEVICE_SDDL           "D:P(A;;GA;;;SY)(A;;GA;;;BA)(A;;GR;;;WD)"
     /* System:GENERIC_ALL, Administrators:GENERIC_ALL, World:GENERIC_READ */
@@ -486,14 +495,28 @@ NTSTATUS FspFileNameInExpression(
     PWCH UpcaseTable,
     PBOOLEAN PResult);
 
+/* UUID5 creation (ku) */
+NTSTATUS FspUuid5Make(const UUID *Namespace, const VOID *Buffer, ULONG Size, UUID *Uuid);
+
 /* utility */
 PVOID FspAllocatePoolMustSucceed(POOL_TYPE PoolType, SIZE_T Size, ULONG Tag);
 PVOID FspAllocateIrpMustSucceed(CCHAR StackSize);
 NTSTATUS FspCreateGuid(GUID *Guid);
 NTSTATUS FspGetDeviceObjectPointer(PUNICODE_STRING ObjectName, ACCESS_MASK DesiredAccess,
     PULONG PFileNameIndex, PFILE_OBJECT *PFileObject, PDEVICE_OBJECT *PDeviceObject);
+NTSTATUS FspRegistryGetValue(PUNICODE_STRING Path, PUNICODE_STRING ValueName,
+    PKEY_VALUE_PARTIAL_INFORMATION ValueInformation, PULONG PValueInformationLength);
 NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
     FILE_INFORMATION_CLASS FileInformationClass, PVOID FileInformation, ULONG Length);
+NTSTATUS FspSendQuerySecurityIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    SECURITY_INFORMATION SecurityInformation,
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PULONG PLength);
+NTSTATUS FspSendQueryEaIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    PFILE_GET_EA_INFORMATION GetEa, ULONG GetEaLength,
+    PFILE_FULL_EA_INFORMATION Ea, PULONG PEaLength);
+NTSTATUS FspSendMountmgrDeviceControlIrp(ULONG IoControlCode,
+    PVOID SystemBuffer, ULONG InputBufferLength, PULONG POutputBufferLength);
 NTSTATUS FspBufferUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
 NTSTATUS FspLockUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
 NTSTATUS FspMapLockedPagesInUserMode(PMDL Mdl, PVOID *PAddress, ULONG ExtraPriorityFlags);
@@ -1048,13 +1071,15 @@ typedef struct
 {
     FSP_DEVICE_EXTENSION Base;
     UINT32 InitDoneFsvrt:1, InitDoneIoq:1, InitDoneSec:1, InitDoneDir:1, InitDoneStrm:1, InitDoneEa:1,
-        InitDoneCtxTab:1, InitDoneTimer:1, InitDoneInfo:1, InitDoneNotify:1, InitDoneStat:1;
+        InitDoneCtxTab:1, InitDoneTimer:1, InitDoneInfo:1, InitDoneNotify:1, InitDoneStat:1,
+        InitDoneFsext;
     PDEVICE_OBJECT FsctlDeviceObject;
     PDEVICE_OBJECT FsvrtDeviceObject;
     PDEVICE_OBJECT FsvolDeviceObject;
     PVPB SwapVpb;
     FSP_DELAYED_WORK_ITEM DeleteVolumeDelayedWorkItem;
     FSP_FSCTL_VOLUME_PARAMS VolumeParams;
+    FSP_FSEXT_PROVIDER *Provider;
     UNICODE_STRING VolumePrefix;
     UNICODE_PREFIX_TABLE_ENTRY VolumePrefixEntry;
     FSP_IOQ *Ioq;
@@ -1078,8 +1103,19 @@ typedef struct
     PNOTIFY_SYNC NotifySync;
     LIST_ENTRY NotifyList;
     FSP_STATISTICS *Statistics;
+    FSP_FSCTL_DECLSPEC_ALIGN UINT8 FsextData[];
 } FSP_FSVOL_DEVICE_EXTENSION;
 typedef struct
+{
+    FSP_DEVICE_EXTENSION Base;
+    UINT16 SectorSize;
+    LONG IsMountdev;
+    BOOLEAN Persistent;
+    GUID UniqueId;
+    UNICODE_STRING VolumeName;
+    WCHAR VolumeNameBuf[FSP_FSCTL_VOLUME_NAME_SIZE / sizeof(WCHAR)];
+} FSP_FSVRT_DEVICE_EXTENSION;
+typedef struct
 {
     FSP_DEVICE_EXTENSION Base;
     UINT32 InitDonePfxTab:1;
@@ -1099,6 +1135,12 @@ FSP_FSVOL_DEVICE_EXTENSION *FspFsvolDeviceExtension(PDEVICE_OBJECT DeviceObject)
     return DeviceObject->DeviceExtension;
 }
 static inline
+FSP_FSVRT_DEVICE_EXTENSION *FspFsvrtDeviceExtension(PDEVICE_OBJECT DeviceObject)
+{
+    ASSERT(FspFsvrtDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
+    return DeviceObject->DeviceExtension;
+}
+static inline
 FSP_FSMUP_DEVICE_EXTENSION *FspFsmupDeviceExtension(PDEVICE_OBJECT DeviceObject)
 {
     ASSERT(FspFsmupDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
@@ -1169,6 +1211,9 @@ VOID FspDeviceGlobalUnlock(VOID)
     //(FILE_DEVICE_DISK_FILE_SYSTEM == (DeviceObject)->DeviceType ?\
     //    STATUS_VOLUME_DISMOUNTED : STATUS_DEVICE_NOT_CONNECTED)
 
+/* fsext */
+FSP_FSEXT_PROVIDER *FspFsextProvider(UINT32 FsextControlCode, PNTSTATUS PLoadResult);
+
 /* process buffers conditional usage */
 static inline
 BOOLEAN FspReadIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize)
@@ -1200,6 +1245,20 @@ BOOLEAN FspQueryDirectoryIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize)
 }
 #endif
 
+/* mountdev */
+NTSTATUS FspMountdevQueryDeviceName(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspMountdevQueryUniqueId(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+BOOLEAN FspMountdevDeviceControl(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
+    PNTSTATUS PResult);
+NTSTATUS FspMountdevMake(
+    PDEVICE_OBJECT FsvrtDeviceObject, PDEVICE_OBJECT FsvolDeviceObject,
+    BOOLEAN Persistent);
+VOID FspMountdevFini(
+    PDEVICE_OBJECT FsvrtDeviceObject);
+
 /* fsmup */
 NTSTATUS FspMupRegister(
     PDEVICE_OBJECT FsmupDeviceObject, PDEVICE_OBJECT FsvolDeviceObject);
@@ -1209,19 +1268,22 @@ NTSTATUS FspMupHandleIrp(
     PDEVICE_OBJECT FsmupDeviceObject, PIRP Irp);
 
 /* volume management */
-#define FspVolumeTransactEarlyTimeout   (1 * 10000ULL)
 NTSTATUS FspVolumeCreate(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 VOID FspVolumeDelete(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeMount(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspVolumeMakeMountdev(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeGetName(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeGetNameList(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeTransact(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspVolumeTransactFsext(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeStop(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeWork(
@@ -1571,7 +1633,7 @@ NTSTATUS FspFileNodeOplockCheckAsyncEx(
         CompletionRoutine,
         PostIrpRoutine);
 #if DBG
-    if (STATUS_SUCCESS == Result && DEBUGTEST(10))
+    if (DEBUGTEST_EX(STATUS_SUCCESS == Result, 10, FALSE))
     {
         Irp->IoStatus.Status = STATUS_SUCCESS;
         Irp->IoStatus.Information = 0;
@@ -1636,4 +1698,74 @@ LOGICAL RtlEqualMemory(const VOID *Source1, const VOID *Source2, SIZE_T Length)
     return Length == RtlCompareMemory(Source1, Source2, Length);
 }
 
+/* FILE_STAT_INFORMATION and FILE_STAT_LX_INFORMATION are missings on some WDK's. */
+typedef struct
+{
+    LARGE_INTEGER FileId;
+    LARGE_INTEGER CreationTime;
+    LARGE_INTEGER LastAccessTime;
+    LARGE_INTEGER LastWriteTime;
+    LARGE_INTEGER ChangeTime;
+    LARGE_INTEGER AllocationSize;
+    LARGE_INTEGER EndOfFile;
+    ULONG FileAttributes;
+    ULONG ReparseTag;
+    ULONG NumberOfLinks;
+    ACCESS_MASK EffectiveAccess;
+} FSP_FILE_STAT_INFORMATION, *PFSP_FILE_STAT_INFORMATION;
+typedef struct
+{
+    LARGE_INTEGER FileId;
+    LARGE_INTEGER CreationTime;
+    LARGE_INTEGER LastAccessTime;
+    LARGE_INTEGER LastWriteTime;
+    LARGE_INTEGER ChangeTime;
+    LARGE_INTEGER AllocationSize;
+    LARGE_INTEGER EndOfFile;
+    ULONG FileAttributes;
+    ULONG ReparseTag;
+    ULONG NumberOfLinks;
+    ACCESS_MASK EffectiveAccess;
+    ULONG LxFlags;
+    ULONG LxUid;
+    ULONG LxGid;
+    ULONG LxMode;
+    ULONG LxDeviceIdMajor;
+    ULONG LxDeviceIdMinor;
+} FSP_FILE_STAT_LX_INFORMATION, *PFSP_FILE_STAT_LX_INFORMATION;
+
+/* ATOMIC_CREATE_ECP_CONTEXT is missing on some WDK's */
+#define ATOMIC_CREATE_ECP_IN_FLAG_REPARSE_POINT_SPECIFIED   0x0002
+#define ATOMIC_CREATE_ECP_OUT_FLAG_REPARSE_POINT_SET        0x0002
+#define ATOMIC_CREATE_ECP_IN_FLAG_BEST_EFFORT               0x0100
+typedef struct
+{
+    LARGE_INTEGER CreationTime;
+    LARGE_INTEGER LastAccessTime;
+    LARGE_INTEGER LastWriteTime;
+    LARGE_INTEGER ChangeTime;
+} FSP_FILE_TIMESTAMPS, *PFSP_FILE_TIMESTAMPS;
+typedef struct
+{
+    USHORT Size;
+    USHORT InFlags;
+    USHORT OutFlags;
+    USHORT ReparseBufferLength;
+    PREPARSE_DATA_BUFFER ReparseBuffer;
+    LONGLONG FileSize;
+    LONGLONG ValidDataLength;
+    PFSP_FILE_TIMESTAMPS FileTimestamps;
+    ULONG FileAttributes;
+    ULONG UsnSourceInfo;
+    USN Usn;
+    ULONG SuppressFileAttributeInheritanceMask;
+    ULONG InOpFlags;
+    ULONG OutOpFlags;
+    ULONG InGenFlags;
+    ULONG OutGenFlags;
+    ULONG CaseSensitiveFlagsMask;
+    ULONG InCaseSensitiveFlags;
+    ULONG OutCaseSensitiveFlags;
+} FSP_ATOMIC_CREATE_ECP_CONTEXT, *PFSP_ATOMIC_CREATE_ECP_CONTEXT;
+
 #endif

src/sys/ea.c

@@ -55,6 +55,7 @@ FSP_DRIVER_DISPATCH FspSetEa;
 #ifdef ALLOC_PRAGMA
 #pragma alloc_text(PAGE, FspFsvolQueryEaGetCopy)
 #pragma alloc_text(PAGE, FspFsvolQueryEaIndexCopy)
+#pragma alloc_text(PAGE, FspFsvolQueryEaCopy)
 #pragma alloc_text(PAGE, FspFsvolQueryEa)
 #pragma alloc_text(PAGE, FspFsvolQueryEaComplete)
 #pragma alloc_text(PAGE, FspFsvolQueryEaRequestFini)

src/sys/fileinfo.c

@@ -45,6 +45,15 @@ static NTSTATUS FspFsvolQueryPositionInformation(PFILE_OBJECT FileObject,
 static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
     PVOID *PBuffer, PVOID BufferEnd,
     const FSP_FSCTL_FILE_INFO *FileInfo);
+static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd,
+    const FSP_FSCTL_FILE_INFO *FileInfo);
+static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd,
+    const FSP_FSCTL_FILE_INFO *FileInfo);
+static NTSTATUS FspFsvolQueryStatLxEaInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd);
 static NTSTATUS FspFsvolQueryStreamInformationCopy(
     FSP_FSCTL_STREAM_INFO *StreamInfoBuffer, ULONG StreamInfoBufferSize,
     PVOID DestBuf, PULONG PDestLen);
@@ -52,6 +61,9 @@ static NTSTATUS FspFsvolQueryStreamInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 static NTSTATUS FspFsvolQueryStreamInformationSuccess(
     PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
+static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
+    PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
+    PACCESS_MASK PEffectiveAccess);
 static NTSTATUS FspFsvolQueryInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
@@ -97,9 +109,13 @@ FAST_IO_QUERY_OPEN FspFastIoQueryOpen;
 #pragma alloc_text(PAGE, FspFsvolQueryNetworkOpenInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryPositionInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryStandardInformation)
+#pragma alloc_text(PAGE, FspFsvolQueryStatBaseInformation)
+#pragma alloc_text(PAGE, FspFsvolQueryStatLxBaseInformation)
+#pragma alloc_text(PAGE, FspFsvolQueryStatLxEaInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryStreamInformationCopy)
 #pragma alloc_text(PAGE, FspFsvolQueryStreamInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryStreamInformationSuccess)
+#pragma alloc_text(PAGE, FspFsvolQueryInformationEffectiveAccess)
 #pragma alloc_text(PAGE, FspFsvolQueryInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryInformationComplete)
 #pragma alloc_text(PAGE, FspFsvolQueryInformationRequestFini)
@@ -301,7 +317,7 @@ static NTSTATUS FspFsvolQueryNameInformation(PFILE_OBJECT FileObject,
     PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
     FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
 
-    if ((PVOID)(Info + 1) > BufferEnd)
+    if ((PVOID)((PUINT8)Info + FIELD_OFFSET(FILE_NAME_INFORMATION, FileName)) > BufferEnd)
         return STATUS_BUFFER_TOO_SMALL;
 
     FspFileNodeAcquireShared(FileNode, Main);
@@ -417,6 +433,187 @@ static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
     return STATUS_SUCCESS;
 }
 
+static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd,
+    const FSP_FSCTL_FILE_INFO *FileInfo)
+{
+    PAGED_CODE();
+
+    PFSP_FILE_STAT_INFORMATION Info = (PFSP_FILE_STAT_INFORMATION)*PBuffer;
+    FSP_FILE_NODE *FileNode = FileObject->FsContext;
+
+    if (0 == FileInfo)
+    {
+        if ((PVOID)(Info + 1) > BufferEnd)
+            return STATUS_BUFFER_TOO_SMALL;
+
+        return STATUS_SUCCESS;
+    }
+
+    Info->FileId.QuadPart = FileNode->IndexNumber;
+    Info->CreationTime.QuadPart = FileInfo->CreationTime;
+    Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
+    Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
+    Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
+    Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
+    Info->EndOfFile.QuadPart = FileInfo->FileSize;
+    Info->FileAttributes = 0 != FileInfo->FileAttributes ?
+        FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
+    Info->ReparseTag = FileInfo->ReparseTag;
+    Info->NumberOfLinks = 1;
+
+    *PBuffer = (PVOID)(Info + 1);
+
+    return STATUS_SUCCESS;
+}
+
+static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd,
+    const FSP_FSCTL_FILE_INFO *FileInfo)
+{
+    PAGED_CODE();
+
+    PFSP_FILE_STAT_LX_INFORMATION Info = (PFSP_FILE_STAT_LX_INFORMATION)*PBuffer;
+    FSP_FILE_NODE *FileNode = FileObject->FsContext;
+
+    if (0 == FileInfo)
+    {
+        if ((PVOID)(Info + 1) > BufferEnd)
+            return STATUS_BUFFER_TOO_SMALL;
+
+        return STATUS_SUCCESS;
+    }
+
+    Info->FileId.QuadPart = FileNode->IndexNumber;
+    Info->CreationTime.QuadPart = FileInfo->CreationTime;
+    Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
+    Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
+    Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
+    Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
+    Info->EndOfFile.QuadPart = FileInfo->FileSize;
+    Info->FileAttributes = 0 != FileInfo->FileAttributes ?
+        FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
+    Info->ReparseTag = FileInfo->ReparseTag;
+    Info->NumberOfLinks = 1;
+
+    *PBuffer = (PVOID)(Info + 1);
+
+    return STATUS_SUCCESS;
+}
+
+static NTSTATUS FspFsvolQueryStatLxEaInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
+    PVOID *PBuffer, PVOID BufferEnd)
+{
+#define ADD_GET_EA(Name, End)           \
+    GetEa->NextEntryOffset = (ULONG)(End ? 0 :\
+        FSP_FSCTL_ALIGN_UP(             \
+            FIELD_OFFSET(FILE_GET_EA_INFORMATION, EaName) + sizeof("" Name),\
+            sizeof(ULONG)));            \
+    GetEa->EaNameLength = (UCHAR)(sizeof("" Name) - 1);\
+    RtlCopyMemory(GetEa->EaName, "" Name, sizeof("" Name));\
+    GetEaLength = (ULONG)((PUINT8)GetEa - (PUINT8)&GetEaBuf.V +\
+        FIELD_OFFSET(FILE_GET_EA_INFORMATION, EaName) + sizeof("" Name));\
+    GetEa = (PVOID)((PUINT8)GetEa + GetEa->NextEntryOffset);
+#define EQUAL_EA_NAME(Name)             \
+    CmpName.Length =                    \
+    CmpName.MaximumLength = sizeof("" Name) - 1,\
+    CmpName.Buffer = "" Name,           \
+    RtlEqualString(&CmpName, &EaName, TRUE/* always case-insensitive */)
+
+    PAGED_CODE();
+
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    PFSP_FILE_STAT_LX_INFORMATION Info = (PFSP_FILE_STAT_LX_INFORMATION)*PBuffer;
+    union
+    {
+        FILE_GET_EA_INFORMATION V;
+        UINT8 B[64];
+    } GetEaBuf;
+    PFILE_GET_EA_INFORMATION GetEa = &GetEaBuf.V;
+    ULONG GetEaLength = 0;
+    union
+    {
+        FILE_FULL_EA_INFORMATION V;
+        UINT8 B[128];
+    } EaBuf;
+    ULONG EaLength = sizeof EaBuf;
+    STRING EaName, CmpName;
+    NTSTATUS Result;
+
+    Info->LxFlags = 0;
+    Info->LxUid = 0;
+    Info->LxGid = 0;
+    Info->LxMode = 0;
+    Info->LxDeviceIdMajor = 0;
+    Info->LxDeviceIdMinor = 0;
+
+    if (!FsvolDeviceExtension->VolumeParams.ExtendedAttributes)
+        return STATUS_SUCCESS;
+
+    ADD_GET_EA("$LXUID", 0);
+    ADD_GET_EA("$LXGID", 0);
+    ADD_GET_EA("$LXMOD", 0);
+    ADD_GET_EA("$LXDEV", 1);
+
+    Result = FspSendQueryEaIrp(FsvolDeviceObject/* bypass filters */, FileObject,
+        &GetEaBuf.V, GetEaLength,
+        &EaBuf.V, &EaLength);
+    if (!NT_SUCCESS(Result))
+        return Result;
+
+    for (PFILE_FULL_EA_INFORMATION Ea = &EaBuf.V, EaEnd = (PVOID)((PUINT8)Ea + EaLength);
+        EaEnd > Ea; Ea = FSP_NEXT_EA(Ea, EaEnd))
+    {
+        EaName.Length =
+        EaName.MaximumLength = Ea->EaNameLength,
+        EaName.Buffer = Ea->EaName;
+
+        if (EQUAL_EA_NAME("$LXUID"))
+        {
+            if (sizeof(ULONG) == Ea->EaValueLength)
+            {
+                Info->LxFlags |= 0x1/*LX_FILE_METADATA_HAS_UID*/;
+                Info->LxUid = *(PULONG)(Ea->EaName + sizeof "$LXUID");
+            }
+        }
+        else
+        if (EQUAL_EA_NAME("$LXGID"))
+        {
+            if (sizeof(ULONG) == Ea->EaValueLength)
+            {
+                Info->LxFlags |= 0x2/*LX_FILE_METADATA_HAS_GID*/;
+                Info->LxGid = *(PULONG)(Ea->EaName + sizeof "$LXGID");
+            }
+        }
+        else
+        if (EQUAL_EA_NAME("$LXMOD"))
+        {
+            if (sizeof(ULONG) == Ea->EaValueLength)
+            {
+                Info->LxFlags |= 0x4/*LX_FILE_METADATA_HAS_MODE*/;
+                Info->LxMode = *(PULONG)(Ea->EaName + sizeof "$LXMOD");
+            }
+        }
+        else
+        if (EQUAL_EA_NAME("$LXDEV"))
+        {
+            if (sizeof(UINT64) == Ea->EaValueLength)
+            {
+                Info->LxFlags |= 0x8/*LX_FILE_METADATA_HAS_DEVICE_ID*/;
+                UINT64 Dev = *(PUINT64)(Ea->EaName + sizeof "$LXDEV");
+                Info->LxDeviceIdMajor = (Dev >> 32) & 0xffffffff;
+                Info->LxDeviceIdMinor = Dev & 0xffffffff;
+            }
+        }
+    }
+
+    return STATUS_SUCCESS;
+
+#undef EQUAL_EA_NAME
+#undef ADD_GET_EA
+}
+
 static NTSTATUS FspFsvolQueryStreamInformationCopy(
     FSP_FSCTL_STREAM_INFO *StreamInfo, ULONG StreamInfoSize,
     PVOID DestBuf, PULONG PDestLen)
@@ -646,6 +843,71 @@ static NTSTATUS FspFsvolQueryStreamInformationSuccess(
     return Result;
 }
 
+static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
+    PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
+    PACCESS_MASK PEffectiveAccess)
+{
+    PAGED_CODE();
+
+    union
+    {
+        SECURITY_DESCRIPTOR V;
+        UINT8 B[256];
+    } SecurityDescriptorBuf;
+    PSECURITY_DESCRIPTOR SecurityDescriptor = &SecurityDescriptorBuf.V;
+    ULONG Length;
+    SECURITY_SUBJECT_CONTEXT SecuritySubjectContext;
+    ACCESS_MASK EffectiveAccess;
+    NTSTATUS Result;
+    BOOLEAN AccessResult;
+
+    *PEffectiveAccess = 0;
+
+    Length = sizeof SecurityDescriptorBuf;
+    Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
+        OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
+        SecurityDescriptor, &Length);
+    if (STATUS_BUFFER_OVERFLOW == Result)
+    {
+        SecurityDescriptor = FspAlloc(Length);
+        if (0 == SecurityDescriptor)
+        {
+            Result = STATUS_INSUFFICIENT_RESOURCES;
+            goto exit;
+        }
+
+        Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
+            OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
+            SecurityDescriptor, &Length);
+    }
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    SeCaptureSubjectContext(&SecuritySubjectContext);
+
+    AccessResult = SeAccessCheck(
+        SecurityDescriptor,
+        &SecuritySubjectContext,
+        FALSE,
+        MAXIMUM_ALLOWED,
+        0,
+        0,
+        IoGetFileObjectGenericMapping(),
+        UserMode,
+        &EffectiveAccess,
+        &Result);
+    if (!AccessResult)
+        goto exit;
+
+    *PEffectiveAccess = EffectiveAccess;
+
+exit:
+    if (&SecurityDescriptorBuf.V != SecurityDescriptor && 0 != SecurityDescriptor)
+        FspFree(SecurityDescriptor);
+
+    return Result;
+}
+
 static NTSTATUS FspFsvolQueryInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {
@@ -720,6 +982,18 @@ static NTSTATUS FspFsvolQueryInformation(
     case FileStandardInformation:
         Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, 0);
         break;
+    case 68/*FileStatInformation*/:
+        if (FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.WslFeatures)
+            Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, 0);
+        else
+            Result = STATUS_INVALID_PARAMETER;
+        break;
+    case 70/*FileStatLxInformation*/:
+        if (FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.WslFeatures)
+            Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, 0);
+        else
+            Result = STATUS_INVALID_PARAMETER;
+        break;
     default:
         Result = STATUS_INVALID_PARAMETER;
         return Result;
@@ -729,6 +1003,26 @@ static NTSTATUS FspFsvolQueryInformation(
         return Result;
 
     FspFileNodeAcquireShared(FileNode, Main);
+
+    switch (FileInformationClass)
+    {
+    case 68/*FileStatInformation*/:
+        FspFsvolQueryInformationEffectiveAccess(
+            FsvolDeviceObject, FileObject, &((FSP_FILE_STAT_INFORMATION *)Buffer)->EffectiveAccess);
+        break;
+    case 70/*FileStatLxInformation*/:
+        FspFsvolQueryInformationEffectiveAccess(
+            FsvolDeviceObject, FileObject, &((FSP_FILE_STAT_LX_INFORMATION *)Buffer)->EffectiveAccess);
+        Result = FspFsvolQueryStatLxEaInformation(
+            FsvolDeviceObject, FileObject, &Buffer, BufferEnd);
+        if (!NT_SUCCESS(Result))
+        {
+            FspFileNodeRelease(FileNode, Main);
+            return Result;
+        }
+        break;
+    }
+
     if (FspFileNodeTryGetFileInfo(FileNode, &FileInfoBuf))
     {
         FspFileNodeRelease(FileNode, Main);
@@ -755,6 +1049,12 @@ static NTSTATUS FspFsvolQueryInformation(
         case FileStandardInformation:
             Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
             break;
+        case 68/*FileStatInformation*/:
+            Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
+            break;
+        case 70/*FileStatLxInformation*/:
+            Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
+            break;
         default:
             ASSERT(0);
             Result = STATUS_INVALID_PARAMETER;
@@ -865,6 +1165,12 @@ NTSTATUS FspFsvolQueryInformationComplete(
     case FileStandardInformation:
         Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, FileInfo);
         break;
+    case 68/*FileStatInformation*/:
+        Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, FileInfo);
+        break;
+    case 70/*FileStatLxInformation*/:
+        Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, FileInfo);
+        break;
     default:
         ASSERT(0);
         Result = STATUS_INVALID_PARAMETER;
@@ -1813,7 +2119,7 @@ BOOLEAN FspFastIoQueryBasicInfo(
         if (Result)
         {
             PVOID Buffer = Info;
-            PVOID BufferEnd = (PUINT8)Info + sizeof Info;
+            PVOID BufferEnd = (PUINT8)Info + sizeof *Info;
             NTSTATUS Result0 = FspFsvolQueryBasicInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
             if (!NT_SUCCESS(Result0))
                 FSP_RETURN(Result = FALSE);
@@ -1851,7 +2157,7 @@ BOOLEAN FspFastIoQueryStandardInfo(
         if (Result)
         {
             PVOID Buffer = Info;
-            PVOID BufferEnd = (PUINT8)Info + sizeof Info;
+            PVOID BufferEnd = (PUINT8)Info + sizeof *Info;
             NTSTATUS Result0 = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
             if (!NT_SUCCESS(Result0))
                 FSP_RETURN(Result = FALSE);
@@ -1889,7 +2195,7 @@ BOOLEAN FspFastIoQueryNetworkOpenInfo(
         if (Result)
         {
             PVOID Buffer = Info;
-            PVOID BufferEnd = (PUINT8)Info + sizeof Info;
+            PVOID BufferEnd = (PUINT8)Info + sizeof *Info;
             NTSTATUS Result0 = FspFsvolQueryNetworkOpenInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
             if (!NT_SUCCESS(Result0))
                 FSP_RETURN(Result = FALSE);
@@ -1933,7 +2239,7 @@ BOOLEAN FspFastIoQueryOpen(
     if (Result)
     {
         PVOID Buffer = Info;
-        PVOID BufferEnd = (PUINT8)Info + sizeof Info;
+        PVOID BufferEnd = (PUINT8)Info + sizeof *Info;
         NTSTATUS Result0 = FspFsvolQueryNetworkOpenInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
         if (!NT_SUCCESS(Result0))
             FSP_RETURN(Result = FALSE);

src/sys/fsctl.c

@@ -77,6 +77,10 @@ static NTSTATUS FspFsctlFileSystemControl(
     case IRP_MN_USER_FS_REQUEST:
         switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
         {
+        case FSP_FSCTL_MOUNTDEV:
+            if (0 != IrpSp->FileObject->FsContext2)
+                Result = FspVolumeMakeMountdev(FsctlDeviceObject, Irp, IrpSp);
+            break;
         case FSP_FSCTL_VOLUME_NAME:
             if (0 != IrpSp->FileObject->FsContext2)
                 Result = FspVolumeGetName(FsctlDeviceObject, Irp, IrpSp);
@@ -86,6 +90,7 @@ static NTSTATUS FspFsctlFileSystemControl(
             break;
         case FSP_FSCTL_TRANSACT:
         case FSP_FSCTL_TRANSACT_BATCH:
+        case FSP_FSCTL_TRANSACT_INTERNAL:
             if (0 != IrpSp->FileObject->FsContext2)
                 Result = FspVolumeTransact(FsctlDeviceObject, Irp, IrpSp);
             break;
@@ -93,6 +98,14 @@ static NTSTATUS FspFsctlFileSystemControl(
             if (0 != IrpSp->FileObject->FsContext2)
                 Result = FspVolumeStop(FsctlDeviceObject, Irp, IrpSp);
             break;
+        default:
+            if (CTL_CODE(0, 0xC00, 0, 0) ==
+                (IrpSp->Parameters.FileSystemControl.FsControlCode & CTL_CODE(0, 0xC00, 0, 0)))
+            {
+                if (0 != IrpSp->FileObject->FsContext2)
+                    Result = FspVolumeTransactFsext(FsctlDeviceObject, Irp, IrpSp);
+            }
+            break;
         }
         break;
     case IRP_MN_MOUNT_VOLUME:

src/sys/fsext.c

@@ -0,0 +1,187 @@
+/**
+ * @file sys/fsext.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <sys/driver.h>
+#include <winfsp/fsext.h>
+
+/*
+ * Maximum number of allowed fsext providers. This must be kept small,
+ * because we do a linear search to find the provider. If this changes
+ * the data structure used to store providers (currently 2 parallel
+ * arrays) must be revisited.
+ */
+#define FSP_FSEXT_PROVIDER_COUNTMAX     16
+
+static KSPIN_LOCK FsextSpinLock = 0;
+static UINT32 FsextControlCodes[FSP_FSEXT_PROVIDER_COUNTMAX];
+static FSP_FSEXT_PROVIDER *FsextProviders[FSP_FSEXT_PROVIDER_COUNTMAX];
+
+static inline
+FSP_FSEXT_PROVIDER *FspFsextProviderGet(UINT32 FsextControlCode)
+{
+    for (ULONG I = 0; FSP_FSEXT_PROVIDER_COUNTMAX > I; I++)
+        if (FsextControlCode == FsextControlCodes[I])
+            return FsextProviders[I];
+
+    return 0;
+}
+
+FSP_FSEXT_PROVIDER *FspFsextProvider(UINT32 FsextControlCode, PNTSTATUS PLoadResult)
+{
+    FSP_FSEXT_PROVIDER *Provider;
+    KIRQL Irql;
+
+    KeAcquireSpinLock(&FsextSpinLock, &Irql);
+    Provider = FspFsextProviderGet(FsextControlCode);
+    KeReleaseSpinLock(&FsextSpinLock, Irql);
+    ASSERT(0 == Provider || FsextControlCode == Provider->DeviceTransactCode);
+
+    if (0 != PLoadResult)
+    {
+        if (0 == Provider)
+        {
+            WCHAR Buf[64 + 256];
+            UNICODE_STRING Path;
+            UNICODE_STRING Name;
+            union
+            {
+                KEY_VALUE_PARTIAL_INFORMATION V;
+                UINT8 B[FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data) + 256];
+            } Value;
+            ULONG Length;
+            NTSTATUS Result;
+
+            RtlInitUnicodeString(&Path, L"" FSP_REGKEY "\\Fsext");
+            RtlInitEmptyUnicodeString(&Name, Buf, sizeof Buf);
+            Result = RtlUnicodeStringPrintf(&Name, L"%08x", FsextControlCode);
+            ASSERT(NT_SUCCESS(Result));
+            Length = sizeof Value;
+            Result = FspRegistryGetValue(&Path, &Name, &Value.V, &Length);
+            if (!NT_SUCCESS(Result))
+            {
+                *PLoadResult = Result;
+                return 0;
+            }
+            if (REG_SZ != Value.V.Type)
+            {
+                *PLoadResult = STATUS_OBJECT_NAME_NOT_FOUND;
+                return 0;
+            }
+
+            RtlInitEmptyUnicodeString(&Path, Buf, sizeof Buf);
+            Result = RtlUnicodeStringPrintf(&Path,
+                L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\%s", (PWSTR)Value.V.Data);
+            ASSERT(NT_SUCCESS(Result));
+
+            Result = ZwLoadDriver(&Path);
+            if (!NT_SUCCESS(Result) && STATUS_IMAGE_ALREADY_LOADED != Result)
+            {
+                *PLoadResult = Result;
+                return 0;
+            }
+
+            KeAcquireSpinLock(&FsextSpinLock, &Irql);
+            Provider = FspFsextProviderGet(FsextControlCode);
+            KeReleaseSpinLock(&FsextSpinLock, Irql);
+            ASSERT(0 == Provider || FsextControlCode == Provider->DeviceTransactCode);
+        }
+
+        *PLoadResult = 0 != Provider ? STATUS_SUCCESS : STATUS_OBJECT_NAME_NOT_FOUND;
+    }
+
+    return Provider;
+}
+
+NTSTATUS FspFsextProviderRegister(FSP_FSEXT_PROVIDER *Provider)
+{
+    NTSTATUS Result;
+    KIRQL Irql;
+
+    KeAcquireSpinLock(&FsextSpinLock, &Irql);
+
+    Result = STATUS_TOO_LATE;
+    for (ULONG I = 0; FSP_FSEXT_PROVIDER_COUNTMAX > I; I++)
+        if (0 == FsextControlCodes[I])
+        {
+            Provider->DeviceExtensionOffset = FIELD_OFFSET(FSP_FSVOL_DEVICE_EXTENSION, FsextData);
+            FsextControlCodes[I] = Provider->DeviceTransactCode;
+            FsextProviders[I] = Provider;
+            Result = STATUS_SUCCESS;
+            break;
+        }
+
+    KeReleaseSpinLock(&FsextSpinLock, Irql);
+
+    return Result;
+}
+
+NTSTATUS FspFsextProviderTransact(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    FSP_FSCTL_TRANSACT_RSP *Response, FSP_FSCTL_TRANSACT_REQ **PRequest)
+{
+    /*
+     * This function uses IoBuildDeviceIoControlRequest to build an IRP and then send it
+     * to the WinFsp driver. IoBuildDeviceIoControlRequest places the IRP in the IRP queue
+     * thus allowing it to be cancelled with CancelSynchronousIo.
+     *
+     * Special kernel APC's must be enabled:
+     * See https://www.osr.com/blog/2018/02/14/beware-iobuilddeviceiocontrolrequest/
+     */
+    ASSERT(!KeAreAllApcsDisabled());
+
+    NTSTATUS Result;
+    IO_STATUS_BLOCK IoStatus;
+    PIRP Irp;
+    PIO_STACK_LOCATION IrpSp;
+
+    if (0 != PRequest)
+        *PRequest = 0;
+
+    if (0 == DeviceObject)
+        DeviceObject = IoGetRelatedDeviceObject(FileObject);
+
+    Irp = IoBuildDeviceIoControlRequest(FSP_FSCTL_TRANSACT_INTERNAL,
+        DeviceObject,
+        Response,
+        0 != Response ? Response->Size : 0,
+        PRequest,
+        0 != PRequest ? sizeof(PVOID) : 0,
+        FALSE,
+        0,
+        &IoStatus);
+    if (0 == Irp)
+        return STATUS_INSUFFICIENT_RESOURCES;
+
+    /*
+     * IoBuildDeviceIoControlRequest builds an IOCTL IRP without a FileObject.
+     * Patch it so that it is an FSCTL IRP with a FileObject. Mark it as
+     * IRP_SYNCHRONOUS_API so that CancelSynchronousIo can cancel it.
+     */
+    Irp->Flags |= IRP_SYNCHRONOUS_API;
+    IrpSp = IoGetNextIrpStackLocation(Irp);
+    IrpSp->MajorFunction = IRP_MJ_FILE_SYSTEM_CONTROL;
+    IrpSp->MinorFunction = IRP_MN_USER_FS_REQUEST;
+    IrpSp->FileObject = FileObject;
+
+    Result = IoCallDriver(DeviceObject, Irp);
+    ASSERT(STATUS_PENDING != Result);
+
+    return Result;
+}

src/sys/ioq.c

@@ -688,6 +688,12 @@ BOOLEAN FspIoqRetryCompleteIrp(FSP_IOQ *Ioq, PIRP Irp, NTSTATUS *PResult)
     Result = FspCsqInsertIrpEx(&Ioq->RetriedIoCsq, Irp, 0, 0);
     if (NT_SUCCESS(Result))
     {
+        /* wake up a waiter */
+        KIRQL Irql;
+        KeAcquireSpinLock(&Ioq->SpinLock, &Irql);
+        FspIoqEventSet(&Ioq->PendingIrpEvent);
+        KeReleaseSpinLock(&Ioq->SpinLock, Irql);
+
         if (0 != PResult)
             *PResult = STATUS_PENDING;
         return TRUE;

src/sys/meta.c

@@ -103,7 +103,7 @@ static inline FSP_META_CACHE_ITEM *FspMetaCacheRemoveExpiredItemAtDpcLevel(FSP_M
     if (Head == Entry)
         return 0;
     FSP_META_CACHE_ITEM *Item = CONTAINING_RECORD(Entry, FSP_META_CACHE_ITEM, ListEntry);
-    if (!FspExpirationTimeValid2(Item->ExpirationTime, ExpirationTime))
+    if (FspExpirationTimeValid2(Item->ExpirationTime, ExpirationTime))
         return 0;
     ULONG HashIndex = Item->ItemIndex % MetaCache->ItemBucketCount;
     for (FSP_META_CACHE_ITEM **P = (PVOID)&MetaCache->ItemBuckets[HashIndex]; *P; P = &(*P)->DictNext)
@@ -202,7 +202,7 @@ UINT64 FspMetaCacheAddItem(FSP_META_CACHE *MetaCache, PCVOID Buffer, ULONG Size)
 {
     if (0 == MetaCache)
         return 0;
-    FSP_META_CACHE_ITEM *Item;
+    FSP_META_CACHE_ITEM *Item, *ExpiredItem = 0;
     FSP_META_CACHE_ITEM_BUFFER *ItemBuffer;
     UINT64 ItemIndex = 0;
     KIRQL Irql;
@@ -236,12 +236,14 @@ UINT64 FspMetaCacheAddItem(FSP_META_CACHE *MetaCache, PCVOID Buffer, ULONG Size)
     }
     KeAcquireSpinLock(&MetaCache->SpinLock, &Irql);
     if (MetaCache->ItemCount >= MetaCache->MetaCapacity)
-        FspMetaCacheRemoveExpiredItemAtDpcLevel(MetaCache, (UINT64)-1LL);
+        ExpiredItem = FspMetaCacheRemoveExpiredItemAtDpcLevel(MetaCache, (UINT64)-1LL);
     ItemIndex = MetaCache->ItemIndex;
     ItemIndex = (UINT64)-1LL == ItemIndex ? 1 : ItemIndex + 1;
     MetaCache->ItemIndex = Item->ItemIndex = ItemIndex;
     FspMetaCacheAddItemAtDpcLevel(MetaCache, Item);
     KeReleaseSpinLock(&MetaCache->SpinLock, Irql);
+    if (0 != ExpiredItem)
+        FspMetaCacheDereferenceItem(ExpiredItem);
     return ItemIndex;
 }
 

src/sys/mountdev.c

@@ -0,0 +1,232 @@
+/**
+ * @file sys/mountdev.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <sys/driver.h>
+
+NTSTATUS FspMountdevQueryDeviceName(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspMountdevQueryUniqueId(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+BOOLEAN FspMountdevDeviceControl(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
+    PNTSTATUS PResult);
+NTSTATUS FspMountdevMake(
+    PDEVICE_OBJECT FsvrtDeviceObject, PDEVICE_OBJECT FsvolDeviceObject,
+    BOOLEAN Persistent);
+VOID FspMountdevFini(
+    PDEVICE_OBJECT FsvrtDeviceObject);
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, FspMountdevQueryDeviceName)
+#pragma alloc_text(PAGE, FspMountdevQueryUniqueId)
+#pragma alloc_text(PAGE, FspMountdevDeviceControl)
+#pragma alloc_text(PAGE, FspMountdevMake)
+#pragma alloc_text(PAGE, FspMountdevFini)
+#endif
+
+NTSTATUS FspMountdevQueryDeviceName(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
+{
+    PAGED_CODE();
+
+    FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+    ULONG OutputBufferLength = IrpSp->Parameters.DeviceIoControl.OutputBufferLength;
+    PMOUNTDEV_NAME OutputBuffer = Irp->AssociatedIrp.SystemBuffer;
+
+    if (sizeof(MOUNTDEV_NAME) > OutputBufferLength)
+        /* NOTE: Windows storage samples also set: Irp->IoStatus.Information = sizeof(MOUNTDEV_NAME) */
+        return STATUS_BUFFER_TOO_SMALL;
+
+    RtlZeroMemory(OutputBuffer, sizeof(MOUNTDEV_NAME));
+    OutputBuffer->NameLength = FsvrtDeviceExtension->VolumeName.Length;
+
+    Irp->IoStatus.Information =
+        FIELD_OFFSET(MOUNTDEV_NAME, Name) + OutputBuffer->NameLength;
+    if (Irp->IoStatus.Information > OutputBufferLength)
+    {
+        Irp->IoStatus.Information = sizeof(MOUNTDEV_NAME);
+        return STATUS_BUFFER_OVERFLOW;
+    }
+
+    RtlCopyMemory(OutputBuffer->Name,
+        FsvrtDeviceExtension->VolumeName.Buffer, OutputBuffer->NameLength);
+
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS FspMountdevQueryUniqueId(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
+{
+    PAGED_CODE();
+
+    FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+    ULONG OutputBufferLength = IrpSp->Parameters.DeviceIoControl.OutputBufferLength;
+    PMOUNTDEV_UNIQUE_ID OutputBuffer = Irp->AssociatedIrp.SystemBuffer;
+
+    if (sizeof(MOUNTDEV_UNIQUE_ID) > OutputBufferLength)
+        /* NOTE: Windows storage samples also set: Irp->IoStatus.Information = sizeof(MOUNTDEV_UNIQUE_ID) */
+        return STATUS_BUFFER_TOO_SMALL;
+
+    RtlZeroMemory(OutputBuffer, sizeof(MOUNTDEV_UNIQUE_ID));
+    OutputBuffer->UniqueIdLength = sizeof FsvrtDeviceExtension->UniqueId;
+
+    Irp->IoStatus.Information =
+        FIELD_OFFSET(MOUNTDEV_UNIQUE_ID, UniqueId) + OutputBuffer->UniqueIdLength;
+    if (Irp->IoStatus.Information > OutputBufferLength)
+    {
+        Irp->IoStatus.Information = sizeof(MOUNTDEV_UNIQUE_ID);
+        return STATUS_BUFFER_OVERFLOW;
+    }
+
+    RtlCopyMemory(OutputBuffer->UniqueId,
+        &FsvrtDeviceExtension->UniqueId, OutputBuffer->UniqueIdLength);
+
+    return STATUS_SUCCESS;
+}
+
+BOOLEAN FspMountdevDeviceControl(
+    PDEVICE_OBJECT FsvrtDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
+    PNTSTATUS PResult)
+{
+    PAGED_CODE();
+
+    if (0 != FsvrtDeviceObject)
+    {
+        FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+        if (0 != InterlockedCompareExchange(&FsvrtDeviceExtension->IsMountdev, 0, 0))
+        {
+            switch (IrpSp->Parameters.DeviceIoControl.IoControlCode)
+            {
+            case IOCTL_MOUNTDEV_QUERY_DEVICE_NAME:
+                *PResult = FspMountdevQueryDeviceName(FsvrtDeviceObject, Irp, IrpSp);
+                return TRUE;
+            case IOCTL_MOUNTDEV_QUERY_UNIQUE_ID:
+                *PResult = FspMountdevQueryUniqueId(FsvrtDeviceObject, Irp, IrpSp);
+                return TRUE;
+            }
+        }
+    }
+
+    return FALSE;
+}
+
+NTSTATUS FspMountdevMake(
+    PDEVICE_OBJECT FsvrtDeviceObject, PDEVICE_OBJECT FsvolDeviceObject,
+    BOOLEAN Persistent)
+{
+    /*
+     * This function converts the fsvrt device into a mountdev device that
+     * responds to MountManager IOCTL's. This allows the fsvrt device to
+     * be mounted using the MountManager.
+     *
+     * This function requires protection against concurrency. In general this
+     * is achieved by acquiring the GlobalDeviceLock.
+     */
+
+    PAGED_CODE();
+
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+    UNICODE_STRING String;
+    WCHAR StringBuf[FSP_FSCTL_VOLUME_FSNAME_SIZE / sizeof(WCHAR) + 18];
+    GUID Guid;
+    NTSTATUS Result;
+
+    ASSERT(FsvolDeviceExtension->FsvrtDeviceObject == FsvrtDeviceObject);
+
+    if (0 != InterlockedCompareExchange(&FsvrtDeviceExtension->IsMountdev, 0, 0))
+        return Persistent == FsvrtDeviceExtension->Persistent ?
+            STATUS_TOO_LATE : STATUS_ACCESS_DENIED;
+
+    FsvrtDeviceExtension->Persistent = Persistent;
+
+    if (Persistent)
+    {
+        /* make UUID v5 from the fsvrt device GUID and a unique string derived from VolumeParams */
+        RtlInitEmptyUnicodeString(&String, StringBuf, sizeof StringBuf);
+        Result = RtlUnicodeStringPrintf(&String,
+            L"%s:%08lx:%08lx",
+            FsvolDeviceExtension->VolumeParams.FileSystemName,
+            FsvolDeviceExtension->VolumeParams.VolumeSerialNumber,
+            FsvolDeviceExtension->VolumeParams.VolumeCreationTime);
+        ASSERT(NT_SUCCESS(Result));
+        Result = FspUuid5Make(&FspFsvrtDeviceClassGuid, String.Buffer, String.Length, &Guid);
+    }
+    else
+        /* create volume guid */
+        Result = FspCreateGuid(&Guid);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    /* initialize the fsvrt device extension */
+    RtlCopyMemory(&FsvrtDeviceExtension->UniqueId, &Guid, sizeof Guid);
+    RtlInitEmptyUnicodeString(&FsvrtDeviceExtension->VolumeName,
+        FsvrtDeviceExtension->VolumeNameBuf, sizeof FsvrtDeviceExtension->VolumeNameBuf);
+    RtlCopyUnicodeString(&FsvrtDeviceExtension->VolumeName, &FsvolDeviceExtension->VolumeName);
+
+    /* mark the fsvrt device as initialized */
+    InterlockedIncrement(&FspFsvrtDeviceExtension(FsvrtDeviceObject)->IsMountdev);
+
+    Result = STATUS_SUCCESS;
+
+exit:
+    return Result;
+}
+
+VOID FspMountdevFini(
+    PDEVICE_OBJECT FsvrtDeviceObject)
+{
+    PAGED_CODE();
+
+    FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
+    PVOID Buffer = 0;
+    ULONG Length = 4096;
+    MOUNTMGR_MOUNT_POINT *MountPoint;
+    NTSTATUS Result;
+
+    if (0 == InterlockedCompareExchange(&FsvrtDeviceExtension->IsMountdev, 0, 0))
+        return;
+
+    if (FsvrtDeviceExtension->Persistent)
+        /* if the mountdev is marked as persistent do not purge the MountManager */
+        return;
+
+    Buffer = FspAllocNonPaged(Length);
+    if (0 == Buffer)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    MountPoint = Buffer;
+    RtlZeroMemory(MountPoint, sizeof *MountPoint);
+    MountPoint->UniqueIdOffset = sizeof(MOUNTMGR_MOUNT_POINT);
+    MountPoint->UniqueIdLength = sizeof FsvrtDeviceExtension->UniqueId;
+    RtlCopyMemory((PUINT8)MountPoint + MountPoint->UniqueIdOffset,
+        &FsvrtDeviceExtension->UniqueId, MountPoint->UniqueIdLength);
+
+    Result = FspSendMountmgrDeviceControlIrp(IOCTL_MOUNTMGR_DELETE_POINTS,
+        Buffer, MountPoint->UniqueIdOffset + MountPoint->UniqueIdLength, &Length);
+
+exit:
+    if (0 != Buffer)
+        FspFree(Buffer);
+}

src/sys/mup.c

@@ -275,6 +275,7 @@ NTSTATUS FspMupHandleIrp(
             if (FspFileNodeIsValid(FileObject->FsContext))
                 FsvolDeviceObject = ((FSP_FILE_NODE *)FileObject->FsContext)->FsvolDeviceObject;
             else if (0 != FileObject->FsContext2 &&
+#pragma prefast(disable:28175, "We are a filesystem: ok to access DeviceObject->Type")
                 3 == ((PDEVICE_OBJECT)FileObject->FsContext2)->Type &&
                 0 != ((PDEVICE_OBJECT)FileObject->FsContext2)->DeviceExtension &&
                 FspFsvolDeviceExtensionKind == FspDeviceExtension((PDEVICE_OBJECT)FileObject->FsContext2)->Kind)

src/sys/util.c

@@ -24,9 +24,20 @@
 NTSTATUS FspCreateGuid(GUID *Guid);
 NTSTATUS FspGetDeviceObjectPointer(PUNICODE_STRING ObjectName, ACCESS_MASK DesiredAccess,
     PULONG PFileNameIndex, PFILE_OBJECT *PFileObject, PDEVICE_OBJECT *PDeviceObject);
+NTSTATUS FspRegistryGetValue(PUNICODE_STRING Path, PUNICODE_STRING ValueName,
+    PKEY_VALUE_PARTIAL_INFORMATION ValueInformation, PULONG PValueInformationLength);
 NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
     FILE_INFORMATION_CLASS FileInformationClass, PVOID FileInformation, ULONG Length);
-static NTSTATUS FspSendSetInformationIrpCompletion(
+NTSTATUS FspSendQuerySecurityIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    SECURITY_INFORMATION SecurityInformation,
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PULONG PLength);
+NTSTATUS FspSendQueryEaIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    PFILE_GET_EA_INFORMATION GetEa, ULONG GetEaLength,
+    PFILE_FULL_EA_INFORMATION Ea, PULONG PEaLength);
+NTSTATUS FspSendMountmgrDeviceControlIrp(ULONG IoControlCode,
+    PVOID SystemBuffer, ULONG InputBufferLength, PULONG POutputBufferLength);
+static NTSTATUS FspSendIrpCompletion(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context0);
 NTSTATUS FspBufferUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
 NTSTATUS FspLockUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
@@ -123,7 +134,11 @@ NTSTATUS FspIrpHookNext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context);
 #ifdef ALLOC_PRAGMA
 #pragma alloc_text(PAGE, FspCreateGuid)
 #pragma alloc_text(PAGE, FspGetDeviceObjectPointer)
+#pragma alloc_text(PAGE, FspRegistryGetValue)
 #pragma alloc_text(PAGE, FspSendSetInformationIrp)
+#pragma alloc_text(PAGE, FspSendQuerySecurityIrp)
+#pragma alloc_text(PAGE, FspSendQueryEaIrp)
+#pragma alloc_text(PAGE, FspSendMountmgrDeviceControlIrp)
 #pragma alloc_text(PAGE, FspBufferUserBuffer)
 #pragma alloc_text(PAGE, FspLockUserBuffer)
 #pragma alloc_text(PAGE, FspMapLockedPagesInUserMode)
@@ -271,11 +286,43 @@ NTSTATUS FspGetDeviceObjectPointer(PUNICODE_STRING ObjectName, ACCESS_MASK Desir
     return Result;
 }
 
+NTSTATUS FspRegistryGetValue(PUNICODE_STRING Path, PUNICODE_STRING ValueName,
+    PKEY_VALUE_PARTIAL_INFORMATION ValueInformation, PULONG PValueInformationLength)
+{
+    PAGED_CODE();
+
+    OBJECT_ATTRIBUTES ObjectAttributes;
+    HANDLE Handle = 0;
+    NTSTATUS Result;
+
+    InitializeObjectAttributes(&ObjectAttributes,
+        Path, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, 0, 0);
+
+    Result = ZwOpenKey(&Handle, KEY_QUERY_VALUE, &ObjectAttributes);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = ZwQueryValueKey(Handle, ValueName,
+        KeyValuePartialInformation, ValueInformation,
+        *PValueInformationLength, PValueInformationLength);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Result = STATUS_SUCCESS;
+        /* NOTE: also converts STATUS_BUFFER_OVERFLOW to STATUS_SUCCESS */
+
+exit:
+    if (0 != Handle)
+        ZwClose(Handle);
+
+    return Result;
+}
+
 typedef struct
 {
     IO_STATUS_BLOCK IoStatus;
     KEVENT Event;
-} FSP_SEND_SET_INFORMATION_IRP_CONTEXT;
+} FSP_SEND_IRP_CONTEXT;
 
 NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
     FILE_INFORMATION_CLASS FileInformationClass, PVOID FileInformation, ULONG Length)
@@ -289,7 +336,7 @@ NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT File
     NTSTATUS Result;
     PIRP Irp;
     PIO_STACK_LOCATION IrpSp;
-    FSP_SEND_SET_INFORMATION_IRP_CONTEXT Context;
+    FSP_SEND_IRP_CONTEXT Context;
 
     if (0 == DeviceObject)
         DeviceObject = IoGetRelatedDeviceObject(FileObject);
@@ -304,24 +351,165 @@ NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT File
     IrpSp->MajorFunction = IRP_MJ_SET_INFORMATION;
     IrpSp->FileObject = FileObject;
     IrpSp->Parameters.SetFile.FileInformationClass = FileInformationClass;
-    IrpSp->Parameters.SetFile.Length = FileInformationClass;
-
-    IoSetCompletionRoutine(Irp, FspSendSetInformationIrpCompletion, &Context, TRUE, TRUE, TRUE);
+    IrpSp->Parameters.SetFile.Length = Length;
 
     KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
+    IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
+
     Result = IoCallDriver(DeviceObject, Irp);
     if (STATUS_PENDING == Result)
         KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
 
-    return NT_SUCCESS(Result) ? Context.IoStatus.Status : Result;
+    return Context.IoStatus.Status;
 }
 
-static NTSTATUS FspSendSetInformationIrpCompletion(
+NTSTATUS FspSendQuerySecurityIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    SECURITY_INFORMATION SecurityInformation,
+    PSECURITY_DESCRIPTOR SecurityDescriptor,
+    PULONG PLength)
+{
+    PAGED_CODE();
+
+    NTSTATUS Result;
+    PIRP Irp;
+    PIO_STACK_LOCATION IrpSp;
+    FSP_SEND_IRP_CONTEXT Context;
+    ULONG Length = *PLength;
+
+    *PLength = 0;
+
+    if (0 == DeviceObject)
+        DeviceObject = IoGetRelatedDeviceObject(FileObject);
+
+    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
+    if (0 == Irp)
+        return STATUS_INSUFFICIENT_RESOURCES;
+
+    IrpSp = IoGetNextIrpStackLocation(Irp);
+    Irp->RequestorMode = KernelMode;
+    Irp->AssociatedIrp.SystemBuffer = SecurityDescriptor;
+    Irp->UserBuffer = SecurityDescriptor;
+    IrpSp->MajorFunction = IRP_MJ_QUERY_SECURITY;
+    IrpSp->FileObject = FileObject;
+    IrpSp->Parameters.QuerySecurity.SecurityInformation = SecurityInformation;
+    IrpSp->Parameters.QuerySecurity.Length = Length;
+
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
+    IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
+
+    Result = IoCallDriver(DeviceObject, Irp);
+    if (STATUS_PENDING == Result)
+        KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
+
+    *PLength = (ULONG)Context.IoStatus.Information;
+    return Context.IoStatus.Status;
+}
+
+NTSTATUS FspSendQueryEaIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT FileObject,
+    PFILE_GET_EA_INFORMATION GetEa, ULONG GetEaLength,
+    PFILE_FULL_EA_INFORMATION Ea, PULONG PEaLength)
+{
+    PAGED_CODE();
+
+    NTSTATUS Result;
+    PIRP Irp;
+    PIO_STACK_LOCATION IrpSp;
+    FSP_SEND_IRP_CONTEXT Context;
+    ULONG EaLength = *PEaLength;
+
+    *PEaLength = 0;
+
+    if (0 == DeviceObject)
+        DeviceObject = IoGetRelatedDeviceObject(FileObject);
+
+    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
+    if (0 == Irp)
+        return STATUS_INSUFFICIENT_RESOURCES;
+
+    IrpSp = IoGetNextIrpStackLocation(Irp);
+    Irp->RequestorMode = KernelMode;
+    Irp->AssociatedIrp.SystemBuffer = Ea;
+    Irp->UserBuffer = Ea;
+    IrpSp->MajorFunction = IRP_MJ_QUERY_EA;
+    IrpSp->FileObject = FileObject;
+    IrpSp->Parameters.QueryEa.Length = EaLength;
+    IrpSp->Parameters.QueryEa.EaList = GetEa;
+    IrpSp->Parameters.QueryEa.EaListLength = GetEaLength;
+
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
+    IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
+
+    Result = IoCallDriver(DeviceObject, Irp);
+    if (STATUS_PENDING == Result)
+        KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
+
+    *PEaLength = (ULONG)Context.IoStatus.Information;
+    return Context.IoStatus.Status;
+}
+
+NTSTATUS FspSendMountmgrDeviceControlIrp(ULONG IoControlCode,
+    PVOID SystemBuffer, ULONG InputBufferLength, PULONG POutputBufferLength)
+{
+    PAGED_CODE();
+
+    ASSERT(METHOD_BUFFERED == (IoControlCode & 3));
+
+    NTSTATUS Result;
+    UNICODE_STRING DeviceName;
+    PFILE_OBJECT FileObject;
+    PDEVICE_OBJECT DeviceObject;
+    PIRP Irp;
+    PIO_STACK_LOCATION IrpSp;
+    FSP_SEND_IRP_CONTEXT Context;
+    ULONG OutputBufferLength = 0;
+
+    if (0 == POutputBufferLength)
+        POutputBufferLength = &OutputBufferLength;
+
+    RtlInitUnicodeString(&DeviceName, MOUNTMGR_DEVICE_NAME);
+    Result = IoGetDeviceObjectPointer(&DeviceName, FILE_READ_ATTRIBUTES,
+        &FileObject, &DeviceObject);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
+    if (0 == Irp)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    IrpSp = IoGetNextIrpStackLocation(Irp);
+    Irp->RequestorMode = KernelMode;
+    Irp->AssociatedIrp.SystemBuffer = SystemBuffer;
+    IrpSp->MajorFunction = IRP_MJ_DEVICE_CONTROL;
+    IrpSp->Parameters.DeviceIoControl.OutputBufferLength = *POutputBufferLength;
+    IrpSp->Parameters.DeviceIoControl.InputBufferLength = InputBufferLength;
+    IrpSp->Parameters.DeviceIoControl.IoControlCode = IoControlCode;
+
+    KeInitializeEvent(&Context.Event, NotificationEvent, FALSE);
+    IoSetCompletionRoutine(Irp, FspSendIrpCompletion, &Context, TRUE, TRUE, TRUE);
+
+    Result = IoCallDriver(DeviceObject, Irp);
+    if (STATUS_PENDING == Result)
+        KeWaitForSingleObject(&Context.Event, Executive, KernelMode, FALSE, 0);
+
+    *POutputBufferLength = (ULONG)Context.IoStatus.Information;
+    Result = Context.IoStatus.Status;
+
+exit:
+    if (0 != FileObject)
+        ObDereferenceObject(FileObject);
+
+    return Result;
+}
+
+static NTSTATUS FspSendIrpCompletion(
     PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context0)
 {
     // !PAGED_CODE();
 
-    FSP_SEND_SET_INFORMATION_IRP_CONTEXT *Context = Context0;
+    FSP_SEND_IRP_CONTEXT *Context = Context0;
 
     Context->IoStatus = Irp->IoStatus;
     KeSetEvent(&Context->Event, 1, FALSE);
@@ -633,6 +821,10 @@ NTSTATUS FspEaBufferFromFileSystemValidate(
 
     *PErrorOffset = 0;
 
+    /* EA buffers from the user mode file system are allowed to have zero length */
+    if (0 == Length)
+        return STATUS_SUCCESS;
+
     /* EA buffers from the user mode file system are allowed to end with NextEntryOffset != 0 */
     for (PFILE_FULL_EA_INFORMATION Ea = Buffer, EaEnd = (PVOID)((PUINT8)Ea + Length);
         EaEnd > Ea; Ea = FSP_NEXT_EA(Ea, EaEnd))

src/sys/volinfo.c

@@ -28,6 +28,9 @@ static NTSTATUS FspFsvolQueryFsDeviceInformation(
 static NTSTATUS FspFsvolQueryFsFullSizeInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PUINT8 *PBuffer, PUINT8 BufferEnd,
     const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
+static NTSTATUS FspFsvolQueryFsSectorSizeInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PUINT8 *PBuffer, PUINT8 BufferEnd,
+    const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
 static NTSTATUS FspFsvolQueryFsSizeInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PUINT8 *PBuffer, PUINT8 BufferEnd,
     const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
@@ -50,6 +53,7 @@ FSP_DRIVER_DISPATCH FspSetVolumeInformation;
 #pragma alloc_text(PAGE, FspFsvolQueryFsAttributeInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryFsDeviceInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryFsFullSizeInformation)
+#pragma alloc_text(PAGE, FspFsvolQueryFsSectorSizeInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryFsSizeInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryFsVolumeInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryVolumeInformation)
@@ -186,6 +190,35 @@ static NTSTATUS FspFsvolQueryFsFullSizeInformation(
     return STATUS_SUCCESS;
 }
 
+static NTSTATUS FspFsvolQueryFsSectorSizeInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PUINT8 *PBuffer, PUINT8 BufferEnd,
+    const FSP_FSCTL_VOLUME_INFO *VolumeInfo)
+{
+    PAGED_CODE();
+
+    if (*PBuffer + sizeof(FILE_FS_SECTOR_SIZE_INFORMATION) > BufferEnd)
+        return STATUS_BUFFER_TOO_SMALL;
+
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    PFILE_FS_SECTOR_SIZE_INFORMATION Info = (PFILE_FS_SECTOR_SIZE_INFORMATION)*PBuffer;
+
+    Info->LogicalBytesPerSector =
+        Info->PhysicalBytesPerSectorForAtomicity =
+        Info->PhysicalBytesPerSectorForPerformance =
+        Info->FileSystemEffectivePhysicalBytesPerSectorForAtomicity =
+            FsvolDeviceExtension->VolumeParams.SectorSize;
+    Info->Flags =
+        SSINFO_FLAGS_ALIGNED_DEVICE |
+        SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE |
+        SSINFO_FLAGS_NO_SEEK_PENALTY;
+    Info->ByteOffsetForSectorAlignment = 0;
+    Info->ByteOffsetForPartitionAlignment = 0;
+
+    *PBuffer += sizeof(FILE_FS_SECTOR_SIZE_INFORMATION);
+
+    return STATUS_SUCCESS;
+}
+
 static NTSTATUS FspFsvolQueryFsSizeInformation(
     PDEVICE_OBJECT FsvolDeviceObject, PUINT8 *PBuffer, PUINT8 BufferEnd,
     const FSP_FSCTL_VOLUME_INFO *VolumeInfo)
@@ -255,7 +288,7 @@ static NTSTATUS FspFsvolQueryVolumeInformation(
 
     NTSTATUS Result;
     PUINT8 Buffer = Irp->AssociatedIrp.SystemBuffer;
-    PUINT8 BufferEnd = Buffer + IrpSp->Parameters.QueryFile.Length;
+    PUINT8 BufferEnd = Buffer + IrpSp->Parameters.QueryVolume.Length;
 
     switch (IrpSp->Parameters.QueryVolume.FsInformationClass)
     {
@@ -268,6 +301,9 @@ static NTSTATUS FspFsvolQueryVolumeInformation(
     case FileFsFullSizeInformation:
         Result = FspFsvolQueryFsFullSizeInformation(FsvolDeviceObject, &Buffer, BufferEnd, 0);
         break;
+    case FileFsSectorSizeInformation:
+        Result = FspFsvolQueryFsSectorSizeInformation(FsvolDeviceObject, &Buffer, BufferEnd, 0);
+        break;
     case FileFsSizeInformation:
         Result = FspFsvolQueryFsSizeInformation(FsvolDeviceObject, &Buffer, BufferEnd, 0);
         break;
@@ -310,7 +346,7 @@ NTSTATUS FspFsvolQueryVolumeInformationComplete(
 
     PDEVICE_OBJECT FsvolDeviceObject = IrpSp->DeviceObject;
     PUINT8 Buffer = Irp->AssociatedIrp.SystemBuffer;
-    PUINT8 BufferEnd = Buffer + IrpSp->Parameters.QueryFile.Length;
+    PUINT8 BufferEnd = Buffer + IrpSp->Parameters.QueryVolume.Length;
 
     FspFsvolDeviceSetVolumeInfo(FsvolDeviceObject, &Response->Rsp.QueryVolumeInformation.VolumeInfo);
 

src/sys/volume.c

@@ -34,6 +34,8 @@ NTSTATUS FspVolumeMount(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 static NTSTATUS FspVolumeMountNoLock(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspVolumeMakeMountdev(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeGetName(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeGetNameList(
@@ -42,6 +44,8 @@ static NTSTATUS FspVolumeGetNameListNoLock(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeTransact(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspVolumeTransactFsext(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeStop(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 NTSTATUS FspVolumeWork(
@@ -55,10 +59,12 @@ NTSTATUS FspVolumeWork(
 // ! #pragma alloc_text(PAGE, FspVolumeDeleteDelayed)
 // ! #pragma alloc_text(PAGE, FspVolumeMount)
 // ! #pragma alloc_text(PAGE, FspVolumeMountNoLock)
+#pragma alloc_text(PAGE, FspVolumeMakeMountdev)
 #pragma alloc_text(PAGE, FspVolumeGetName)
 #pragma alloc_text(PAGE, FspVolumeGetNameList)
 #pragma alloc_text(PAGE, FspVolumeGetNameListNoLock)
 #pragma alloc_text(PAGE, FspVolumeTransact)
+#pragma alloc_text(PAGE, FspVolumeTransactFsext)
 #pragma alloc_text(PAGE, FspVolumeStop)
 #pragma alloc_text(PAGE, FspVolumeWork)
 #endif
@@ -100,6 +106,7 @@ static NTSTATUS FspVolumeCreateNoLock(
     UNICODE_STRING VolumeName;
     UNICODE_STRING FsmupDeviceName;
     WCHAR VolumeNameBuf[FSP_FSCTL_VOLUME_NAME_SIZE / sizeof(WCHAR)];
+    FSP_FSEXT_PROVIDER *Provider = 0;
     PDEVICE_OBJECT FsvolDeviceObject;
     PDEVICE_OBJECT FsvrtDeviceObject;
     FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension;
@@ -132,7 +139,9 @@ static NTSTATUS FspVolumeCreateNoLock(
         VolumeParams.SectorsPerAllocationUnit = 1;
     if (0 == VolumeParams.MaxComponentLength)
         VolumeParams.MaxComponentLength = 255;
-    if (FspFsctlTransactTimeoutMinimum > VolumeParams.TransactTimeout ||
+    if (0 == VolumeParams.TransactTimeout)
+        VolumeParams.TransactTimeout = 24 * 60 * 60 * 1000; /* 1 day */
+    else if (FspFsctlTransactTimeoutMinimum > VolumeParams.TransactTimeout ||
         VolumeParams.TransactTimeout > FspFsctlTransactTimeoutMaximum)
         VolumeParams.TransactTimeout = FspFsctlTransactTimeoutDefault;
     if (FspFsctlIrpTimeoutMinimum > VolumeParams.IrpTimeout ||
@@ -207,6 +216,14 @@ static NTSTATUS FspVolumeCreateNoLock(
     VolumeParams.AlwaysUseDoubleBuffering = 1;
 #endif
 
+    /* load any fsext provider */
+    if (0 != VolumeParams.FsextControlCode)
+    {
+        Provider = FspFsextProvider(VolumeParams.FsextControlCode, &Result);
+        if (0 == Provider)
+            return Result;
+    }
+
     /* create volume guid */
     Result = FspCreateGuid(&Guid);
     if (!NT_SUCCESS(Result))
@@ -224,7 +241,8 @@ static NTSTATUS FspVolumeCreateNoLock(
     VolumeName.MaximumLength = VolumeName.Length;
 
     /* create the volume (and virtual disk) device(s) */
-    Result = FspDeviceCreate(FspFsvolDeviceExtensionKind, 0,
+    Result = FspDeviceCreate(FspFsvolDeviceExtensionKind,
+        0 == Provider ? 0 : Provider->DeviceExtensionSize,
         FsctlDeviceObject->DeviceType,
         FILE_DEVICE_DISK_FILE_SYSTEM == FsctlDeviceObject->DeviceType ? 0 : FILE_REMOTE_DEVICE,
         &FsvolDeviceObject);
@@ -263,13 +281,18 @@ static NTSTATUS FspVolumeCreateNoLock(
     if (NT_SUCCESS(Result))
     {
         if (0 != FsvrtDeviceObject)
+        {
+            FspFsvrtDeviceExtension(FsvrtDeviceObject)->SectorSize =
+                FsvolDeviceExtension->VolumeParams.SectorSize;
             Result = FspDeviceInitialize(FsvrtDeviceObject);
         }
+    }
     if (!NT_SUCCESS(Result))
     {
         if (0 != FsvrtDeviceObject)
             FspDeviceDereference(FsvrtDeviceObject);
         FspDeviceDereference(FsvolDeviceObject);
+        return Result;
     }
 
     /* do we need to register with fsmup? */
@@ -305,10 +328,22 @@ VOID FspVolumeDelete(
     // !PAGED_CODE();
 
     PDEVICE_OBJECT FsvolDeviceObject = IrpSp->FileObject->FsContext2;
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
     FSP_FILE_NODE **FileNodes;
     ULONG FileNodeCount, Index;
     NTSTATUS Result;
 
+    /*
+     * If we have an fsvrt that is a mountdev, finalize it now! Finalizing a mountdev
+     * involves interaction with the MountManager, which tries to open our devices.
+     * So if we delay this interaction and we do it during final fsvrt teardown (i.e.
+     * FspDeviceDelete time) we will fail such opens with STATUS_CANCELLED, which will
+     * confuse the MountManager.
+     */
+    if (0 != FsvrtDeviceObject)
+        FspMountdevFini(FsvrtDeviceObject);
+
     FspDeviceReference(FsvolDeviceObject);
 
     FspDeviceGlobalLock();
@@ -527,6 +562,50 @@ static NTSTATUS FspVolumeMountNoLock(
     return STATUS_SUCCESS;
 }
 
+NTSTATUS FspVolumeMakeMountdev(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
+{
+    PAGED_CODE();
+
+    ASSERT(IRP_MJ_FILE_SYSTEM_CONTROL == IrpSp->MajorFunction);
+    ASSERT(IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction);
+    ASSERT(FSP_FSCTL_MOUNTDEV == IrpSp->Parameters.FileSystemControl.FsControlCode);
+    ASSERT(0 != IrpSp->FileObject->FsContext2);
+
+    PDEVICE_OBJECT FsvolDeviceObject = IrpSp->FileObject->FsContext2;
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
+    ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
+    ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
+    BOOLEAN Persistent = 0 < InputBufferLength ? !!*(PBOOLEAN)Irp->AssociatedIrp.SystemBuffer : FALSE;
+    NTSTATUS Result;
+
+    if (0 == FsvrtDeviceObject)
+        return STATUS_INVALID_PARAMETER;
+    if (sizeof(GUID) > OutputBufferLength)
+        return STATUS_INVALID_PARAMETER;
+
+    FspDeviceGlobalLock();
+
+    Result = FspMountdevMake(FsvrtDeviceObject, FsvolDeviceObject, Persistent);
+    if (!NT_SUCCESS(Result))
+    {
+        if (STATUS_TOO_LATE != Result)
+            goto exit;
+    }
+
+    RtlCopyMemory(Irp->AssociatedIrp.SystemBuffer,
+        &FspFsvrtDeviceExtension(FsvrtDeviceObject)->UniqueId, sizeof(GUID));
+
+    Irp->IoStatus.Information = sizeof(GUID);
+    Result = STATUS_SUCCESS;
+
+exit:
+    FspDeviceGlobalUnlock();
+
+    return Result;
+}
+
 NTSTATUS FspVolumeGetName(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {
@@ -650,10 +729,8 @@ NTSTATUS FspVolumeTransact(
     ASSERT(IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction);
     ASSERT(
         FSP_FSCTL_TRANSACT == IrpSp->Parameters.FileSystemControl.FsControlCode ||
-        FSP_FSCTL_TRANSACT_BATCH == IrpSp->Parameters.FileSystemControl.FsControlCode);
-    ASSERT(
-        METHOD_BUFFERED == (IrpSp->Parameters.FileSystemControl.FsControlCode & 3) ||
-        METHOD_OUT_DIRECT == (IrpSp->Parameters.FileSystemControl.FsControlCode & 3));
+        FSP_FSCTL_TRANSACT_BATCH == IrpSp->Parameters.FileSystemControl.FsControlCode ||
+        FSP_FSCTL_TRANSACT_INTERNAL == IrpSp->Parameters.FileSystemControl.FsControlCode);
     ASSERT(0 != IrpSp->FileObject->FsContext2);
 
     /* check parameters */
@@ -661,8 +738,21 @@ NTSTATUS FspVolumeTransact(
     ULONG ControlCode = IrpSp->Parameters.FileSystemControl.FsControlCode;
     ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
     ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
-    PVOID InputBuffer = Irp->AssociatedIrp.SystemBuffer;
+    PVOID InputBuffer = 0;
     PVOID OutputBuffer = 0;
+    if (FSP_FSCTL_TRANSACT_INTERNAL == ControlCode)
+    {
+        InputBuffer = IrpSp->Parameters.FileSystemControl.Type3InputBuffer;
+        if (KernelMode != Irp->RequestorMode)
+            return STATUS_INVALID_DEVICE_REQUEST;
+        ASSERT(0 == InputBufferLength ||
+            FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_RSP)) <= InputBufferLength);
+        ASSERT(0 == OutputBufferLength ||
+            sizeof(PVOID) <= OutputBufferLength);
+    }
+    else
+    {
+        InputBuffer = Irp->AssociatedIrp.SystemBuffer;
         if (0 != InputBufferLength &&
             FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_RSP)) > InputBufferLength)
             return STATUS_INVALID_PARAMETER;
@@ -672,6 +762,7 @@ NTSTATUS FspVolumeTransact(
             (FSP_FSCTL_TRANSACT_BATCH == ControlCode &&
                 FSP_FSCTL_TRANSACT_BATCH_BUFFER_SIZEMIN > OutputBufferLength)))
             return STATUS_BUFFER_TOO_SMALL;
+    }
 
     if (!FspDeviceReference(FsvolDeviceObject))
         return STATUS_CANCELLED;
@@ -681,6 +772,7 @@ NTSTATUS FspVolumeTransact(
     PUINT8 BufferEnd;
     FSP_FSCTL_TRANSACT_RSP *Response, *NextResponse;
     FSP_FSCTL_TRANSACT_REQ *Request, *PendingIrpRequest;
+    PVOID InternalBuffer = 0;
     PIRP ProcessIrp, PendingIrp, RetriedIrp, RepostedIrp;
     ULONG LoopCount;
     LARGE_INTEGER Timeout;
@@ -749,6 +841,9 @@ NTSTATUS FspVolumeTransact(
     /* were we sent an output buffer? */
     switch (ControlCode & 3)
     {
+    case METHOD_NEITHER:
+        OutputBuffer = Irp->UserBuffer;
+        break;
     case METHOD_OUT_DIRECT:
         if (0 != Irp->MdlAddress)
             OutputBuffer = MmGetMdlVirtualAddress(Irp->MdlAddress);
@@ -770,17 +865,17 @@ NTSTATUS FspVolumeTransact(
 
     /* wait for an IRP to arrive */
     KeQuerySystemTime(&Timeout);
-    Timeout.QuadPart += 0 == RepostedIrp ?
-        FsvolDeviceExtension->VolumeParams.TransactTimeout * 10000ULL :
-        FspVolumeTransactEarlyTimeout;
+    Timeout.QuadPart += FsvolDeviceExtension->VolumeParams.TransactTimeout * 10000ULL;
         /* convert millis to nanos and add to absolute time */
-    while (0 == (PendingIrp = FspIoqNextPendingIrp(FsvolDeviceExtension->Ioq, 0, &Timeout, Irp)))
+    if (0 == (PendingIrp = FspIoqNextPendingIrp(FsvolDeviceExtension->Ioq, 0, &Timeout, Irp)))
     {
         if (FspIoqStopped(FsvolDeviceExtension->Ioq))
         {
             Result = STATUS_CANCELLED;
             goto exit;
         }
+
+        PendingIrp = FspIoqTimeout;
     }
     if (FspIoqTimeout == PendingIrp || FspIoqCancelled == PendingIrp)
     {
@@ -793,7 +888,9 @@ NTSTATUS FspVolumeTransact(
     RepostedIrp = 0;
     Request = OutputBuffer;
     BufferEnd = (PUINT8)OutputBuffer + OutputBufferLength;
-    ASSERT(FspFsctlTransactCanProduceRequest(Request, BufferEnd));
+    ASSERT(FSP_FSCTL_TRANSACT_INTERNAL == ControlCode ?
+        TRUE :
+        FspFsctlTransactCanProduceRequest(Request, BufferEnd));
     LoopCount = FspIoqPendingIrpCount(FsvolDeviceExtension->Ioq);
     for (;;)
     {
@@ -813,9 +910,19 @@ NTSTATUS FspVolumeTransact(
         else if (!NT_SUCCESS(Result))
             FspIopCompleteIrp(PendingIrp, Result);
         else
+        {
+            if (FSP_FSCTL_TRANSACT_INTERNAL == ControlCode)
+            {
+                InternalBuffer = FspAllocatePoolMustSucceed(
+                    PagedPool, PendingIrpRequest->Size, FSP_ALLOC_EXTERNAL_TAG);
+                RtlCopyMemory(InternalBuffer, PendingIrpRequest, PendingIrpRequest->Size);
+                *(PVOID *)OutputBuffer = InternalBuffer;
+            }
+            else
             {
                 RtlCopyMemory(Request, PendingIrpRequest, PendingIrpRequest->Size);
                 Request = FspFsctlTransactProduceRequest(Request, PendingIrpRequest->Size);
+            }
 
             if (!FspIoqStartProcessingIrp(FsvolDeviceExtension->Ioq, PendingIrp))
             {
@@ -826,12 +933,24 @@ NTSTATUS FspVolumeTransact(
                  * also cancel the PendingIrp we have in our hands.
                  */
                 ASSERT(FspIoqStopped(FsvolDeviceExtension->Ioq));
+                if (0 != InternalBuffer)
+                {
+                    ASSERT(FSP_FSCTL_TRANSACT_INTERNAL == ControlCode);
+                    FspFree(InternalBuffer);
+                }
                 FspIopCompleteCanceledIrp(PendingIrp);
                 Result = STATUS_CANCELLED;
                 goto exit;
             }
 
             /* are we doing single request or batch mode? */
+            if (FSP_FSCTL_TRANSACT_INTERNAL == ControlCode)
+            {
+                Irp->IoStatus.Information = sizeof(PVOID);
+                Result = STATUS_SUCCESS;
+                goto exit;
+            }
+            else
             if (FSP_FSCTL_TRANSACT == ControlCode)
                 break;
 
@@ -858,6 +977,35 @@ exit:
     return Result;
 }
 
+NTSTATUS FspVolumeTransactFsext(
+    PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
+{
+    PAGED_CODE();
+
+    ASSERT(IRP_MJ_FILE_SYSTEM_CONTROL == IrpSp->MajorFunction);
+    ASSERT(IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction);
+    ASSERT(CTL_CODE(0, 0xC00, 0, 0) ==
+        (IrpSp->Parameters.FileSystemControl.FsControlCode & CTL_CODE(0, 0xC00, 0, 0)));
+    ASSERT(0 != IrpSp->FileObject->FsContext2);
+
+    PDEVICE_OBJECT FsvolDeviceObject = IrpSp->FileObject->FsContext2;
+    if (!FspDeviceReference(FsvolDeviceObject))
+        return STATUS_CANCELLED;
+
+    FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
+    NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
+    if (IrpSp->Parameters.FileSystemControl.FsControlCode ==
+        FsvolDeviceExtension->VolumeParams.FsextControlCode)
+    {
+        if (0 != FsvolDeviceExtension->Provider)
+            Result = FsvolDeviceExtension->Provider->DeviceTransact(FsvolDeviceObject, Irp);
+    }
+
+    FspDeviceDereference(FsvolDeviceObject);
+
+    return Result;
+}
+
 NTSTATUS FspVolumeStop(
     PDEVICE_OBJECT FsctlDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {

tools/build.bat

@@ -6,7 +6,7 @@ setlocal EnableDelayedExpansion
 set MsiName="WinFsp - Windows File System Proxy"
 set CrossCert="%~dp0DigiCert High Assurance EV Root CA.crt"
 set Issuer="DigiCert"
-set Subject="Navimatics Corporation"
+set Subject="Navimatics LLC"
 
 set Configuration=Release
 set SignedPackage=
@@ -83,11 +83,11 @@ for %%f in (build\%Configuration%\winfsp-*.msi) do (
 
 if not %signfail%==0 echo SIGNING FAILED! The product has been successfully built, but not signed.
 
-where /q choco.exe
-if %ERRORLEVEL% equ 0 (
 for %%f in (build\%Configuration%\winfsp-*.msi) do set Version=%%~nf
 set Version=!Version:winfsp-=!
 
+where /q choco.exe
+if %ERRORLEVEL% equ 0 (
     copy ..\choco\* build\%Configuration%
     copy ..\choco\LICENSE.TXT /B + ..\..\License.txt /B build\%Configuration%\LICENSE.txt /B
     certutil -hashfile build\%Configuration%\winfsp-!Version!.msi SHA256 >>build\%Configuration%\VERIFICATION.txt
@@ -95,6 +95,11 @@ if %ERRORLEVEL% equ 0 (
     if errorlevel 1 goto fail
 )
 
+pushd build\%Configuration%
+powershell -command "Compress-Archive -Path winfsp-tests-*.exe,..\..\..\..\License.txt,..\..\..\..\tst\winfsp-tests\README.md -DestinationPath winfsp-tests-!Version!.zip"
+if errorlevel 1 goto fail
+popd
+
 exit /b 0
 
 :fail

tools/debug.bat

@@ -4,7 +4,7 @@ setlocal
 
 set DebugWorkspace=winfsp
 set DebugPort=50000
-set DebugKey=win8.debug.net.key
+set DebugKey=1.1.1.1
 
 set RegKey="HKLM\SOFTWARE\Microsoft\Windows Kits\Installed Roots"
 set RegVal="KitsRoot10"

tools/deploy.bat

@@ -5,6 +5,7 @@ setlocal
 set CONFIG=Debug
 set SUFFIX=x64
 set TARGET_MACHINE=WIN8DBG
+if not X%1==X set TARGET_MACHINE=%1
 set TARGET_ACCOUNT=\Users\%USERNAME%\Downloads\winfsp\
 set TARGET=\\%TARGET_MACHINE%%TARGET_ACCOUNT%
 
@@ -14,7 +15,7 @@ for %%f in (winfsp-%SUFFIX%.sys winfsp-%SUFFIX%.dll winfsp-tests-%SUFFIX%.exe fs
 	copy build\VStudio\build\%CONFIG%\%%f %TARGET% >nul
 )
 copy tools\ifstest.bat %TARGET% >nul
-echo sc create WinFsp type=filesys binPath=%%~dp0%DRIVER% >%TARGET%sc-create.bat
+echo sc create WinFsp type=filesys binPath=%%~dp0winfsp-%SUFFIX%.sys >%TARGET%sc-create.bat
 echo sc start WinFsp >%TARGET%sc-start.bat
 echo sc stop WinFsp >%TARGET%sc-stop.bat
 echo sc delete WinFsp >%TARGET%sc-delete.bat

tools/impdef.bat

@@ -0,0 +1,44 @@
+@echo off
+
+setlocal
+setlocal EnableDelayedExpansion
+
+if X%1==X goto usage
+if X%2==X goto usage
+set infile=%1
+set infile=%infile:/=\%
+set outfile=%2
+set outfile=%outfile:/=\%
+set workdir=!infile!.work
+set workbase=!workdir!\%~n2
+set outarch=%~n2
+set outarch=%outarch:~-3%
+
+set arch=x64
+set cdef=/D_AMD64_
+if /i X%outarch%==Xx86 set arch=x86
+if /i X%outarch%==Xx86 set cdef=/D_X86_
+
+call "%VS140COMNTOOLS%\..\..\VC\vcvarsall.bat" !arch!
+set INCLUDE=%~dp0..\opt\fsext\inc;%~dp0..\inc;!WindowsSdkDir!Include\!WindowsSDKVersion!km\crt;!WindowsSdkDir!Include\!WindowsSDKVersion!km;!WindowsSdkDir!Include\!WindowsSDKVersion!km\shared;!INCLUDE!
+
+if exist !workdir! rmdir /s/q !workdir!
+mkdir !workdir!
+
+type !infile! >>!workbase!.c
+cl /LD /Fe!workbase!.sys /Fo!workbase!.obj !cdef! /D_KERNEL_MODE /wd4716 !workbase!.c
+if errorlevel 1 goto fail
+
+copy !workbase!.lib !outfile!
+if errorlevel 1 goto fail
+
+rmdir /s/q !workdir!
+
+exit /b 0
+
+:fail
+exit /b 1
+
+:usage
+echo usage: impdef.bat infile.impdef outfile.lib 1>&2
+exit /b 2

tools/run-tests.bat

@@ -71,12 +71,17 @@ set dfl_tests=^
     winfsp-tests-dotnet-external-share ^
     fsx-memfs-dotnet-disk ^
     fsx-memfs-dotnet-net ^
+    fsx-memfs-dotnet-slowio ^
     winfstest-memfs-dotnet-disk ^
     winfstest-memfs-dotnet-net
 set opt_tests=^
     ifstest-memfs-x64-disk ^
     ifstest-memfs-x86-disk ^
     ifstest-memfs-dotnet-disk ^
+    sample-memfs-fuse3-x64 ^
+    sample-fsx-memfs-fuse3-x64 ^
+    sample-memfs-fuse3-x86 ^
+    sample-fsx-memfs-fuse3-x86 ^
     sample-airfs-x64 ^
     sample-airfs-x86 ^
     sample-passthrough-x64 ^
@@ -498,6 +503,11 @@ call :__run_fsx_memfs_slowio_test memfs32-slowio memfs-x86
 if !ERRORLEVEL! neq 0 goto fail
 exit /b 0
 
+:fsx-memfs-dotnet-slowio
+call :__run_fsx_memfs_slowio_test memfs.net-slowio memfs-dotnet-msil
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
 :__run_fsx_memfs_slowio_test
 set RunSampleTestExit=0
 call "%ProjRoot%\tools\fsreg" %1 "%ProjRoot%\build\VStudio\build\%Configuration%\%2.exe" "-u %%%%1 -m %%%%2 -M 50 -P 10 -R 5" "D:P(A;;RPWPLC;;;WD)"
@@ -669,6 +679,28 @@ for /F "delims=" %%l in ('call "%ProjRoot%\tools\ifstest.bat" %* /v ^| findstr /
 if not X!IfsTestFound!==XYES set IfsTestExit=1
 exit /b !IfsTestExit!
 
+:sample-memfs-fuse3-x64
+call :__run_sample_fuse_test memfs-fuse3 x64 memfs-fuse3-x64 winfsp-tests-x64 ^
+    "-create_fileattr_test -create_readonlydir_test -setfileinfo_test"
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-memfs-fuse3-x86
+call :__run_sample_fuse_test memfs-fuse3 x86 memfs-fuse3-x86 winfsp-tests-x86 ^
+    "-create_fileattr_test -create_readonlydir_test -setfileinfo_test"
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-fsx-memfs-fuse3-x64
+call :__run_sample_fsx_fuse_test memfs-fuse3 x64 memfs-fuse3-x64 fsx
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-fsx-memfs-fuse3-x86
+call :__run_sample_fsx_fuse_test memfs-fuse3 x86 memfs-fuse3-x86 fsx
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
 :sample-airfs-x64
 call :__run_sample_disk_test airfs x64 airfs-x64 winfsp-tests-x64 NOEXCL
 if !ERRORLEVEL! neq 0 goto fail

tst/airfs/.gitignore

@@ -3,3 +3,6 @@ build
 *.suo
 *.vcproj.*
 *.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs

tst/airfs/airfs.vcxproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
@@ -22,32 +22,32 @@
     <ProjectGuid>{CA441CE7-C4DE-4B5E-AA72-D4D483413EF0}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>airfs</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -171,6 +171,10 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="airfs.cpp" />
+    <ClCompile Include="persistence.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="common.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

tst/airfs/airfs.vcxproj.filters

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
     <Filter Include="Source">
@@ -10,5 +10,13 @@
     <ClCompile Include="airfs.cpp">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="persistence.cpp">
+      <Filter>Source</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="common.h">
+      <Filter>Source</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

tst/airfs/common.h

@@ -0,0 +1,210 @@
+/**
+ * @file common.h
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+/*
+ * Airfs is based on Memfs with changes contributed by John Oberschelp.
+ * The contributed changes are under joint copyright by Bill Zissimopoulos
+ * and John Oberschelp per the Contributor Agreement found at the
+ * root of this project.
+ */
+
+#include <winfsp/winfsp.h>
+#include <io.h>
+#include <sddl.h>
+#include <stdio.h>
+#include <stdint.h>
+
+#define PROGNAME "airfs"
+#define ROUND_UP(   bytes, units )  (((bytes) + (units) - 1) / (units) * (units))
+#define ROUND_DOWN( bytes, units )  (((bytes)              ) / (units) * (units))
+#define MINIMUM_ALLOCSIZE 196
+#define MAXIMUM_ALLOCSIZE ROUND_DOWN(10*1024*1024, MINIMUM_ALLOCSIZE)
+#define SECTOR_SIZE                   512
+#define SECTORS_PER_ALLOCATION_UNIT     1
+#define ALLOCATION_UNIT ( SECTOR_SIZE * SECTORS_PER_ALLOCATION_UNIT )
+#define INFO(format, ...) FspServiceLog(EVENTLOG_INFORMATION_TYPE , format, __VA_ARGS__)
+#define WARN(format, ...) FspServiceLog(EVENTLOG_WARNING_TYPE     , format, __VA_ARGS__)
+#define FAIL(format, ...) FspServiceLog(EVENTLOG_ERROR_TYPE       , format, __VA_ARGS__)
+#define AIRFS_MAX_PATH 512
+#define FILEBLOCK_OVERHEAD 40  //  size of ( P + E + L + R + FileOffset ) = 8 * 5 = 40
+#define ARG_TO_S(v) if (arge > ++argp) v = *argp; else goto usage
+#define ARG_TO_4(v) if (arge > ++argp) v = (int32_t) wcstoll_default(*argp, v); else goto usage
+#define ARG_TO_8(v) if (arge > ++argp) v =           wcstoll_default(*argp, v); else goto usage
+
+enum StorageFileAccessType {ZERO=0,READ,WRITE};
+enum Neighbor {LT=-2,LE=-1,EQ=0,GE=1,GT=2};
+
+struct  NODE;
+typedef NODE* NODE_;
+
+typedef int CompareFunction (void* key,  NODE_);
+
+inline NTSTATUS GetLastErrorAsStatus()
+{
+    return FspNtStatusFromWin32(GetLastError());
+}
+
+inline UINT64 SystemTime()
+{
+    FILETIME FileTime;
+    GetSystemTimeAsFileTime(&FileTime);
+    return ((PLARGE_INTEGER)&FileTime)->QuadPart;
+}
+
+static int64_t wcstoll_default(wchar_t *w, int64_t deflt)
+{
+    wchar_t *endp;
+    int64_t i = wcstoll(w, &endp, 0);
+    return L'\0' != w[0] && L'\0' == *endp ? i : deflt;
+}
+
+//////////////////////////////////////////////////////////////////////
+//
+//  Where<T> Class: This class manages an offset within our memory-mapped 
+//  volume to another location within our memory-mapped volume. Because it is
+//  a self-relative offset, this delta is constant regardless of where in
+//  memory the file system is mapped, so we can always reobtain its address. 
+//  A delta of 0 is the special case for "null".
+//
+
+template <class T> class Where
+{
+    int64_t delta;
+
+  public:
+
+    Where() = default;
+   ~Where() = default;
+    Where(T      t) : delta(  t      ?(  (char*)t          -(char*)this  ):0) {}
+    Where(Where& w) : delta(  w.delta?( ((char*)&w+w.delta)-(char*)this  ):0) {}
+
+      operator bool  () { return delta != 0; }
+      operator T     () { return (T)    ( delta?(  (char*)this+delta   ):0); }
+    T operator ->    () { return (T)    ( delta?(  (char*)this+delta   ):0); }
+      operator void* () { return (void*)( delta?(  (char*)this+delta   ):0); }
+
+    bool operator == (Where& rhs) { return (char*)this+delta == (char*)&rhs+rhs.delta; }
+    bool operator != (Where& rhs) { return (char*)this+delta != (char*)&rhs+rhs.delta; }
+    bool operator == (T rhs)      { return (char*)this+delta == (char*)rhs; }
+    bool operator != (T rhs)      { return (char*)this+delta != (char*)rhs; }
+
+    Where& operator = (Where& rhs) { delta = rhs.delta?(  ((char*)&rhs+rhs.delta) - ((char*)this)  ):0; return *this; }
+    Where& operator = (void*  rhs) { delta = rhs      ?(   (char*)rhs             - ((char*)this)  ):0; return *this; }
+
+    char* Address () { return (char*)this+delta; }
+};
+
+//////////////////////////////////////////////////////////////////////
+//
+//  The header for an Airfs volume
+//
+
+typedef struct
+{
+    char         Signature[8];        //  Airfs\0\0\0
+    char         MapFormatVersion[4]; //  Major.Minor.Patch.Build
+    char         filler[4];
+    Where<NODE_> Root;
+    Where<NODE_> Available;
+    UINT64       VolumeSize;
+    UINT64       FreeSize;
+    WCHAR        VolumeLabel[32];
+    UINT16       VolumeLabelLength;
+    UINT16       filler1,filler2,filler3;
+    UINT32       CaseInsensitive;
+    UINT32       filler4;
+    int64_t      VolumeLength;
+    FSP_FSCTL_VOLUME_PARAMS VolumeParams;
+    FSP_FILE_SYSTEM *FileSystem;
+    HANDLE       MapFileHandle;
+    HANDLE       MapHandle;
+} AIRFS, *AIRFS_;
+
+//////////////////////////////////////////////////////////////////////
+//
+//  Information per file or directory
+//
+struct NODE
+{
+    Where<NODE_> P,L,R,E;  //  Sorted sibling tree: Parent, Left, Right, and Equal
+    union
+    {
+        Where<WCHAR*> Name;
+        int64_t FileOffset;
+    };
+    Where<NODE_>  Parent;
+    Where<NODE_>  Children;
+    FSP_FSCTL_FILE_INFO FileInfo;
+    uint64_t      SecurityDescriptorSize;
+    Where<char*>  SecurityDescriptor;
+    Where<NODE_>  FileBlocks;
+    uint64_t      ReparseDataSize;
+    Where<char*>  ReparseData;
+    volatile LONG RefCount;
+    Where<NODE_>  Streams;
+    BOOLEAN       IsAStream;
+};
+
+//////////////////////////////////////////////////////////////////////
+
+class SpinLock
+{
+    LONG   C;  //  Counter
+    HANDLE S;  //  Semaphore
+
+  public:
+
+    SpinLock() { C = 0; S = CreateSemaphore(NULL, 0, 1, NULL); }
+   ~SpinLock() { CloseHandle(S); }
+
+    void Acquire() { if (_InterlockedIncrement(&C) > 1) WaitForSingleObject(S, INFINITE); }
+    void Release() { if (_InterlockedDecrement(&C) > 0) ReleaseSemaphore(S, 1, NULL); }
+};
+
+//////////////////////////////////////////////////////////////////////
+
+void Airprint (const char * format, ...);
+
+int           SizeCmp (void* key,  NODE_);
+int      ExactNameCmp (void* key,  NODE_);
+int   CaselessNameCmp (void* key,  NODE_);
+
+NODE_ Find   (Where<NODE_> &root, void* key, CompareFunction);
+NODE_ Near   (Where<NODE_> &root, void* key, CompareFunction, Neighbor);
+void  Attach (Where<NODE_> &root, NODE_ attach, CompareFunction, void* key);
+void  Detach (Where<NODE_> &root, NODE_ detach);
+NODE_ First  (NODE_ start);
+NODE_ Last   (NODE_ start);
+NODE_ Next   (NODE_);
+NODE_ Prev   (NODE_);
+
+NTSTATUS StorageStartup         (AIRFS_ &, WCHAR* MapName, WCHAR* StorageFileName, int64_t Length);
+NTSTATUS StorageShutdown        (AIRFS_);
+void*    StorageAllocate        (AIRFS_, int64_t RequestedSize);
+void*    StorageReallocate      (AIRFS_, void* Reallocate, int64_t RequestedSize);
+void     StorageFree            (AIRFS_, void* Release);
+NTSTATUS StorageSetFileCapacity (AIRFS_, NODE_, int64_t MinimumRequiredCapacity);
+void     StorageAccessFile      (StorageFileAccessType, NODE_, int64_t Offset, int64_t NumBytes, char* Address);
+
+static_assert(AIRFS_MAX_PATH > MAX_PATH, "AIRFS_MAX_PATH must be greater than MAX_PATH.");
+static_assert(sizeof NODE + sizeof int32_t == MINIMUM_ALLOCSIZE, "MINIMUM_ALLOCSIZE should be 196.");
+
+//////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////

tst/airfs/persistence.cpp

@@ -0,0 +1,594 @@
+/**
+ * @file persistence.cpp
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+/*
+ * Airfs is based on Memfs with changes contributed by John Oberschelp.
+ * The contributed changes are under joint copyright by Bill Zissimopoulos
+ * and John Oberschelp per the Contributor Agreement found at the
+ * root of this project.
+ */
+/*
+ * Airfs uses a memory-mapped file per volume to achieve persistence.
+ * The primary advantage of this is that volume loads and saves are automatic.
+ * The two primary disadvantages, and our workarounds are:
+ *   1. We can't use standard containers or memory management,
+ *      so the below Rubbertree and Storage functions are used instead.
+ *   2. Each process will map the volume to an arbitrary address,
+ *      so Where<T> offsets are used in place of pointers.
+ */
+
+#include "common.h"
+
+SpinLock StorageLock, AirprintLock, SetLock;
+
+int SizeCmp ( void* key,  NODE_ x)
+{
+    return *(int32_t*)key - ((int32_t*)x)[-1];
+}
+
+int BlockCmp ( void* key,  NODE_ x)
+{
+    int64_t left  = *(int64_t*)key;
+    int64_t right = x->FileOffset;
+    return left == right ? 0 : (left < right ? -1 : 1);
+}
+
+int CaselessNameCmp ( void* key,  NODE_ x)
+{ 
+    WCHAR* c1 = (WCHAR*) key;
+    WCHAR* c2 = x->Name;
+    return _wcsicmp(c1,c2); 
+}
+
+int ExactNameCmp ( void* key,  NODE_ x)
+{ 
+    WCHAR* c1 = (WCHAR*) key;
+    WCHAR* c2 = x->Name;
+    return wcscmp(c1,c2); 
+}
+
+//////////////////////////////////////////////////////////////////////
+
+void Airprint (const char * format, ...)
+{
+    AirprintLock.Acquire();
+    va_list args;
+    va_start(args, format);
+    char szBuffer[512];
+    sprintf_s(szBuffer, 511, "Airfs %5.5f  ----", SystemTime() / 10'000'000.0);
+    vsnprintf(szBuffer+25, 511-25, format, args);
+    OutputDebugStringA(szBuffer);
+    va_end(args);
+    AirprintLock.Release();
+}
+
+//////////////////////////////////////////////////////////////////////
+//
+//  Rubbertree (because it is flexible!)
+//  Implements a sorted set of elements, using a binary tree.
+//  Has a function, Near, that finds nodes at or adjacent to a key.
+//  Attach, Find, and Near use splay to improve random access times.
+//  First, Last, Next, and Prev do not, to improve sequential access times.
+//  Replacing each Where<NODE_> with NODE_ would make this a pointer-based tree.
+//  In addition to Left, Right, and Parent references, each node has an Equal
+//  reference that may be used to keep "equivalent" nodes. This is used by
+//  our memory heap manager's tree of available memory blocks, sorted by size.
+
+//--------------------------------------------------------------------
+
+inline void rotateL(Where<NODE_> &root, NODE_ x)
+{
+    NODE_ y = x->R, p = x->P;
+    if (x->R = y->L) y->L->P = x;
+    if (!(y->P = p))
+        root = y;
+    else
+    {
+        if (x == p->L) p->L = y;
+        else           p->R = y;
+    }
+    (y->L = x)->P = y;
+}
+
+//--------------------------------------------------------------------
+
+inline void rotateR(Where<NODE_> &root, NODE_ y)
+{
+    NODE_ x = y->L, p = y->P;
+    if (y->L = x->R) x->R->P = y;
+    if (!(x->P = p))
+        root = x;
+    else
+    {
+        if (y == p->L) p->L = x;
+        else           p->R = x;
+    }
+    (x->R = y)->P = x;
+}
+
+//--------------------------------------------------------------------
+
+static void splay(Where<NODE_> &root, NODE_ x)
+{
+    while (NODE_ p = x->P)
+    {
+        if (!p->P)
+        {
+            if (p->L == x) rotateR(root, p);
+            else           rotateL(root, p);
+        } 
+        else
+        {
+            if (p == p->P->R)
+            {
+                if (p->R == x) rotateL(root, p->P);
+                else           rotateR(root, p);
+                rotateL(root, x->P); 
+            }
+            else
+            {
+                if (p->L == x) rotateR(root, p->P);
+                else           rotateL(root, p);
+                rotateR(root, x->P);
+            }
+        }
+    }
+}
+
+//--------------------------------------------------------------------
+
+inline int seek(Where<NODE_> &root, NODE_ &x, void* key, CompareFunction CMP) 
+{
+    x = root;
+    for (;;)
+    {
+        int diff = CMP(key, x);
+        if (diff < 0)
+        {
+            if (!x->L) return -1;
+            x = x->L;
+        }
+        else if (diff > 0)
+        {
+            if (!x->R) return  1;
+            x = x->R;
+        }
+        else           return  0;
+    }
+}
+
+//--------------------------------------------------------------------
+
+inline NODE_ next(NODE_ x)
+{
+    if (x->R) { x = x->R; while (x->L) x = x->L; return x; }
+    NODE_ p = x->P;
+    while (p && x == p->R) { x = p; p = p->P; }
+    return p;
+}
+
+//--------------------------------------------------------------------
+
+inline NODE_ prev(NODE_ x)
+{
+    if (x->L) { x = x->L; while (x->R) x = x->R; return x; }
+    NODE_ p = x->P;
+    while (p && x == p->L) { x = p; p = p->P; }
+    return p;
+}
+
+//--------------------------------------------------------------------
+
+NODE_ First(NODE_ x)
+{
+    SetLock.Acquire();
+    if (x) while (x->L) x = x->L; 
+    SetLock.Release();
+    return x;
+}
+
+//--------------------------------------------------------------------
+
+NODE_ Last(NODE_ x)
+{
+    SetLock.Acquire();
+    if (x) while (x->R) x = x->R;
+    SetLock.Release();
+    return x;
+}
+
+//--------------------------------------------------------------------
+    
+NODE_ Next(NODE_ x)
+{
+    SetLock.Acquire();
+    x = next(x);
+    SetLock.Release();
+    return x;
+}
+
+//--------------------------------------------------------------------
+
+NODE_ Prev(NODE_ x)
+{
+    SetLock.Acquire();
+    x = prev(x);
+    SetLock.Release();
+    return x;
+}
+
+//--------------------------------------------------------------------
+
+NODE_ Near(Where<NODE_> &root, void* key, CompareFunction CMP, Neighbor want)
+{
+    //  Return a node relative to (just <, <=, ==, >=, or >) a key.
+    if (!root) return 0;
+    SetLock.Acquire();
+    NODE_ x;
+    int dir = seek(root, x, key, CMP);
+    if ((dir == 0 && want == GT) || (dir > 0 && want >= GE)) x = next(x);
+    else
+    if ((dir == 0 && want == LT) || (dir < 0 && want <= LE)) x = prev(x);
+    else
+    if (dir != 0 && want == EQ) x = 0;
+    if (x) splay(root, x);
+    SetLock.Release();
+    return x;
+}
+
+//--------------------------------------------------------------------
+
+NODE_ Find(Where<NODE_> &root, void* key, CompareFunction CMP)
+{
+    if (!root) return 0;
+    SetLock.Acquire();
+    NODE_ x;
+    int direction = seek(root, x, key, CMP);
+    splay(root, x);
+    SetLock.Release();
+    return direction?0:x;
+}
+
+//--------------------------------------------------------------------
+
+void Attach(Where<NODE_> &root, NODE_ x, CompareFunction CMP, void* key)
+{
+    SetLock.Acquire();
+    if (!root)
+    {
+        root = x;
+        x->P = x->L = x->R = x->E = 0;
+        SetLock.Release();
+        return;
+    }
+    NODE_ f;
+    int diff = seek(root, f, key, CMP);
+    if (!diff)
+    {
+        if (x->L = f->L) x->L->P = x;
+        if (x->R = f->R) x->R->P = x;
+        NODE_ p = f->P;
+        if (x->P = p) { if (p->L == f) p->L = x; else p->R = x; }
+        else root = x;
+        (x->E = f)->P = x;
+        f->L = f->R = 0;
+        splay(root, x);
+        SetLock.Release();
+        return;
+    }
+    if (diff < 0) f->L = x; else f->R = x;
+    x->P = f;
+    x->L = x->R = x->E = 0;
+    splay(root, x);
+    SetLock.Release();
+}
+
+//--------------------------------------------------------------------
+
+void Detach(Where<NODE_> &root, NODE_ x)
+{
+    SetLock.Acquire();
+    NODE_ e = x->E, p = x->P;
+    if (p && p->E == x) { if (p->E = e) e->P = p; }
+    else if (e)
+    {
+        if (e->L = x->L) e->L->P = e;
+        if (e->R = x->R) e->R->P = e;
+        if (e->P = p) { if (p->L == x) p->L = e; else p->R = e; }
+        else root = e;
+    }
+    else if (!x->L)
+    {
+        if (p) { if ( p->L == x) p->L = x->R; else p->R = x->R; }
+        else root = x->R;
+        if (x->R) x->R->P = p;
+    }
+    else if (!x->R)
+    {
+        if (p) { if ( p->L == x) p->L = x->L; else p->R = x->L; }
+        else root = x->L;
+        if (x->L) x->L->P = p; 
+    }
+    else
+    {
+        e = x->L;
+        if (e->R)
+        {
+            do { e = e->R; } while (e->R);
+            if (e->P->R = e->L) e->L->P = e->P;
+            (e->L = x->L)->P = e;
+        }
+        (e->R = x->R)->P = e;
+        if (e->P = x->P) { if (e->P->L == x) e->P->L = e; else e->P->R = e; }
+        else root = e;
+    }
+    SetLock.Release();
+}
+
+//////////////////////////////////////////////////////////////////////
+//
+//  Storage Functions for our memory-mapped file-based persistent volumes
+
+//--------------------------------------------------------------------
+
+void* StorageAllocate(AIRFS_ Airfs, int64_t RequestedSize)
+{
+    if (!RequestedSize) return 0;
+    if (RequestedSize + sizeof int32_t > MAXIMUM_ALLOCSIZE) return 0;
+
+    StorageLock.Acquire();
+    int32_t RoundedSize = (int32_t) ROUND_UP(RequestedSize, MINIMUM_ALLOCSIZE - sizeof int32_t);
+    int32_t SplitableSize = RoundedSize + MINIMUM_ALLOCSIZE;
+
+    //  See if we have a freed node of the size we requested.
+    NODE_ NewItem = Near(Airfs->Available, &RoundedSize, SizeCmp, GE);
+    if (NewItem)
+    {
+        int32_t FoundSize = ((int32_t*)NewItem)[-1];
+        if (FoundSize < SplitableSize)
+        {
+            Detach(Airfs->Available, NewItem);
+            Airfs->FreeSize -= FoundSize;
+            StorageLock.Release();
+            return NewItem;
+        }
+    }
+
+    //  If not, see if we can downsize a larger freed element.
+    NewItem = Near(Airfs->Available, &SplitableSize, SizeCmp, GE);
+    if (NewItem)
+    {
+        int32_t FoundSize = ((int32_t*)NewItem)[-1];
+        Detach(Airfs->Available, NewItem);
+        Airfs->FreeSize -= FoundSize;
+        char* Addr = (char*)NewItem + RoundedSize + sizeof int32_t;
+        NODE_ Remainder = (NODE_) Addr;
+        int32_t RemainderSize = FoundSize - (RoundedSize + sizeof int32_t);
+        ((int32_t*)Remainder)[-1] = RemainderSize;
+        Attach(Airfs->Available, Remainder, SizeCmp, &RemainderSize);
+        Airfs->FreeSize += RemainderSize;
+        ((int32_t*)NewItem)[-1] = RoundedSize;
+        StorageLock.Release();
+        return NewItem;
+    }
+
+    //  If not, give up.
+    StorageLock.Release();
+    return 0;
+}
+
+//--------------------------------------------------------------------
+
+void* StorageReallocate(AIRFS_ Airfs, void* OldAlloc, int64_t RequestedSize)
+{
+    if (!OldAlloc)
+    {
+        return StorageAllocate(Airfs, RequestedSize);
+    }
+
+    if (!RequestedSize)
+    {
+        StorageFree(Airfs, OldAlloc);
+        return 0;
+    }
+
+    int32_t OldSize = ((int32_t*)OldAlloc)[-1];
+    void* NewAlloc = StorageAllocate(Airfs, RequestedSize);
+    if (!NewAlloc) return 0;
+    memcpy(NewAlloc, OldAlloc, min(RequestedSize, OldSize));
+    StorageFree(Airfs, OldAlloc);
+    return NewAlloc;
+}
+
+//--------------------------------------------------------------------
+
+void StorageFree(AIRFS_ Airfs, void* r)
+{
+    if (!r) return;
+    StorageLock.Acquire();
+    NODE_ release = (NODE_) r;
+    int32_t Size = ((int32_t*)r)[-1];
+    Attach(Airfs->Available, release, SizeCmp, &Size);
+    Airfs->FreeSize += Size;
+    StorageLock.Release();
+}
+
+//--------------------------------------------------------------------
+
+void StorageAccessFile(StorageFileAccessType Type, NODE_ Node, int64_t AccessOffset, int64_t NumBytes, char* MemoryAddress)
+{
+    StorageLock.Acquire();
+
+    NODE_ Block = Near(Node->FileBlocks, &AccessOffset, BlockCmp, LE);
+    for (;;)
+    {
+        int32_t BlockSize   = ((int32_t*)Block)[-1];
+        int64_t BlockOffset = Block->FileOffset;
+        int64_t BlockIndex  = AccessOffset - BlockOffset + FILEBLOCK_OVERHEAD;
+        int64_t BlockNum    = min(BlockSize-BlockIndex, NumBytes);
+
+        switch (Type)
+        {
+          case ZERO  : { memset((char*)Block + BlockIndex, 0, BlockNum); break; }
+          case READ  : { memcpy(MemoryAddress, (char*)Block + BlockIndex, BlockNum); break; }
+          case WRITE : { memcpy((char*)Block + BlockIndex, MemoryAddress, BlockNum); break; }
+        }
+        NumBytes -= BlockNum;
+        if (!NumBytes) break;
+        MemoryAddress += BlockNum;
+        AccessOffset += BlockNum;
+        Block = Next(Block);
+    }
+
+    StorageLock.Release();
+}
+
+//--------------------------------------------------------------------
+
+NTSTATUS StorageSetFileCapacity(AIRFS_ Airfs, NODE_ Node, int64_t minimumRequiredCapacity)
+{
+    StorageLock.Acquire();
+
+    int64_t TargetCapacity = ROUND_UP(minimumRequiredCapacity, ALLOCATION_UNIT);
+    NODE_   Block = Last(Node->FileBlocks);
+    int32_t BlockSize = Block ? ((int32_t*)Block)[-1] : 0;
+    int64_t CurrentCapacity = Block ? Block->FileOffset + BlockSize - FILEBLOCK_OVERHEAD: 0;
+    int64_t Add = TargetCapacity - CurrentCapacity;
+
+    while (Add > 0)
+    {
+        //  Add a block if we can, preferably as large or larger than we need.
+        Add += FILEBLOCK_OVERHEAD;
+        Block             = Near(Airfs->Available, &Add, SizeCmp, GE);
+        if (!Block) Block = Near(Airfs->Available, &Add, SizeCmp, LT);
+        Add -= FILEBLOCK_OVERHEAD;
+        if (Block)
+        {
+            Detach(Airfs->Available, Block);
+            BlockSize = ((int32_t*)Block)[-1];
+            Airfs->FreeSize -= BlockSize;
+            Block->FileOffset = CurrentCapacity;
+            Attach(Node->FileBlocks, Block, BlockCmp, &CurrentCapacity);
+            CurrentCapacity += BlockSize - FILEBLOCK_OVERHEAD;
+            Add -= BlockSize - FILEBLOCK_OVERHEAD;
+            continue;
+        }
+
+        StorageLock.Release();
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    //  Throw away any trailing blocks that are no longer needed.
+    while (Add < 0)
+    {
+        Block = Last(Node->FileBlocks);
+        BlockSize = ((int32_t*)Block)[-1];
+        if (BlockSize - FILEBLOCK_OVERHEAD > -Add) break;
+        Add += BlockSize - FILEBLOCK_OVERHEAD;
+        Detach(Node->FileBlocks, Block);
+        Attach(Airfs->Available, Block, SizeCmp, &BlockSize);
+        Airfs->FreeSize += BlockSize;
+    }
+
+    //  Possibly downsize the last block.
+    if (Add < 0)
+    {
+        Block = Last(Node->FileBlocks);
+        int32_t OldBlockSize = ((int32_t*)Block)[-1];
+        int32_t NewBlockSize = OldBlockSize - (int32_t) ROUND_DOWN(-Add, MINIMUM_ALLOCSIZE);
+        if (NewBlockSize < MINIMUM_ALLOCSIZE) NewBlockSize = MINIMUM_ALLOCSIZE;
+        int32_t RemainderBlockSize = OldBlockSize - NewBlockSize - sizeof int32_t;
+        if (RemainderBlockSize >= MINIMUM_ALLOCSIZE)  //  i.e. if not too near the end
+        {
+            char* Addr = (char*)Block + NewBlockSize + sizeof int32_t;
+            NODE_ Remainder = (NODE_) Addr;
+            ((int32_t*)Remainder)[-1] = RemainderBlockSize;
+            Attach(Airfs->Available, Remainder, SizeCmp, &RemainderBlockSize);
+            Airfs->FreeSize += RemainderBlockSize;
+            ((int32_t*)Block)[-1] = NewBlockSize;
+        }
+    }
+
+    StorageLock.Release();
+    return 0;
+}
+
+//--------------------------------------------------------------------
+
+NTSTATUS StorageStartup(AIRFS_ &Airfs, WCHAR* MapName, WCHAR* StorageFileName, int64_t VolumeLength)
+{
+    HANDLE MapFileHandle = INVALID_HANDLE_VALUE;
+    Airfs = 0;
+
+    //  Open.
+    if (*StorageFileName)
+    {
+        MapFileHandle = CreateFileW(StorageFileName, GENERIC_READ|GENERIC_WRITE|GENERIC_EXECUTE, 0, NULL, OPEN_ALWAYS, NULL, NULL);
+        if (MapFileHandle == INVALID_HANDLE_VALUE) return GetLastErrorAsStatus();
+    }
+
+    //  Map.
+    HANDLE MapHandle = CreateFileMappingW(MapFileHandle, NULL, PAGE_EXECUTE_READWRITE, VolumeLength>>32, VolumeLength & 0xFFFFFFFF, MapName);
+    if (!MapHandle) return GetLastErrorAsStatus();
+
+    //  Point.
+    char* MappedAddress = (char*) MapViewOfFile(MapHandle, FILE_MAP_ALL_ACCESS, 0, 0, VolumeLength);
+    if (!MappedAddress) return GetLastErrorAsStatus();
+
+    //  Keep.
+    Airfs = (AIRFS_) MappedAddress;
+    Airfs->MapFileHandle = MapFileHandle;
+    Airfs->MapHandle = MapHandle;
+    Airfs->VolumeLength = VolumeLength;
+
+    return 0;
+}
+
+//--------------------------------------------------------------------
+
+NTSTATUS StorageShutdown(AIRFS_ Airfs)
+{
+    BOOL Ok;
+    NTSTATUS Result = 0;
+    HANDLE M = Airfs->MapHandle;
+    HANDLE F = Airfs->MapFileHandle;
+
+    Ok = FlushViewOfFile(Airfs, 0);  if (!Ok && !Result) Result = GetLastErrorAsStatus();
+    if (F != INVALID_HANDLE_VALUE)
+    {
+        Ok = FlushFileBuffers(F);    if (!Ok && !Result) Result = GetLastErrorAsStatus();
+        //  TODO: Set and write a flag something like Airfs->UpdatesCompleted here?
+    }
+    Ok = UnmapViewOfFile(Airfs);     if (!Ok && !Result) Result = GetLastErrorAsStatus();
+    
+    if (M)
+    {
+        Ok = CloseHandle(M);         if (!Ok && !Result) Result = GetLastErrorAsStatus();
+    }
+    if (F != INVALID_HANDLE_VALUE)
+    {
+        Ok = CloseHandle(F);         if (!Ok && !Result) Result = GetLastErrorAsStatus();
+    }
+
+    return Result;
+}
+
+//////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////

tst/launcher-tests/echo.c

@@ -0,0 +1,35 @@
+/*
+ * Compile:
+ *     - cl -I"%ProgramFiles(x86)%\WinFsp\inc" "%ProgramFiles(x86)%\WinFsp\lib\winfsp-x64.lib" echo.c
+ *
+ * Register:
+ *     - echo.reg (fix Executable path first)
+ *
+ * Run:
+ *     - launchctl-x64 start echo 1 \foo\bar\baz
+ *
+ * Expect:
+ *     - "\foo\bar\baz" "bar:baz" "DOMAIN\\USERNAME"
+ */
+
+#include <winfsp/winfsp.h>
+
+int wmain(int argc, wchar_t *argv[])
+{
+    WCHAR buf[512], *bufp;
+    int len;
+
+    bufp = buf;
+    for (int i = 0; argc > i; i++)
+    {
+        len = lstrlenW(argv[i]);
+        memcpy(bufp, argv[i], len * sizeof(WCHAR));
+        bufp += len;
+        *bufp++ = '\n';
+    }
+    *bufp = '\0';
+
+    FspServiceLog(EVENTLOG_INFORMATION_TYPE, L"%s", buf);
+
+    return 0;
+}

tst/memfs-dotnet/Program.cs

@@ -19,12 +19,17 @@
  * associated repository.
  */
 
+#define MEMFS_SLOWIO
+
 using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Security.AccessControl;
 using System.Threading;
+#if MEMFS_SLOWIO
+using System.Threading.Tasks;
+#endif
 
 using Fsp;
 using VolumeInfo = Fsp.Interop.VolumeInfo;
@@ -232,15 +237,20 @@ namespace memfs
 
     class Memfs : FileSystemBase
     {
+        private FileSystemHost Host;
         public const UInt16 MEMFS_SECTOR_SIZE = 512;
         public const UInt16 MEMFS_SECTORS_PER_ALLOCATION_UNIT = 1;
 
         public Memfs(
-            Boolean CaseInsensitive, UInt32 MaxFileNodes, UInt32 MaxFileSize, String RootSddl)
+            Boolean CaseInsensitive, UInt32 MaxFileNodes, UInt32 MaxFileSize, String RootSddl,
+            UInt64 SlowioMaxDelay, UInt64 SlowioPercentDelay, UInt64 SlowioRarefyDelay)
         {
             this.FileNodeMap = new FileNodeMap(CaseInsensitive);
             this.MaxFileNodes = MaxFileNodes;
             this.MaxFileSize = MaxFileSize;
+            this.SlowioMaxDelay = SlowioMaxDelay;
+            this.SlowioPercentDelay = SlowioPercentDelay;
+            this.SlowioRarefyDelay = SlowioRarefyDelay;
 
             /*
              * Create root directory.
@@ -259,7 +269,7 @@ namespace memfs
 
         public override Int32 Init(Object Host0)
         {
-            FileSystemHost Host = (FileSystemHost)Host0;
+            Host = (FileSystemHost)Host0;
             Host.SectorSize = Memfs.MEMFS_SECTOR_SIZE;
             Host.SectorsPerAllocationUnit = Memfs.MEMFS_SECTORS_PER_ALLOCATION_UNIT;
             Host.VolumeCreationTime = (UInt64)DateTime.Now.ToFileTimeUtc();
@@ -274,9 +284,24 @@ namespace memfs
             Host.PostCleanupWhenModifiedOnly = true;
             Host.PassQueryDirectoryFileName = true;
             Host.ExtendedAttributes = true;
+            Host.WslFeatures = true;
             return STATUS_SUCCESS;
         }
 
+#if MEMFS_SLOWIO
+        public override int Mounted(object Host)
+        {
+            SlowioTasksRunning = 0;
+            return STATUS_SUCCESS;
+        }
+
+        public override void Unmounted(object Host)
+        {
+            while (SlowioTasksRunning != 0)
+                Thread.Sleep(1000);
+        }
+#endif
+
         public override Int32 GetVolumeInfo(
             out VolumeInfo VolumeInfo)
         {
@@ -331,8 +356,9 @@ namespace memfs
             UInt32 FileAttributes,
             Byte[] SecurityDescriptor,
             UInt64 AllocationSize,
-            IntPtr Ea,
-            UInt32 EaLength,
+            IntPtr ExtraBuffer,
+            UInt32 ExtraLength,
+            Boolean ExtraBufferIsReparsePoint,
             out Object FileNode0,
             out Object FileDesc,
             out FileInfo FileInfo,
@@ -369,12 +395,22 @@ namespace memfs
             FileNode.FileInfo.FileAttributes = 0 != (FileAttributes & (UInt32)System.IO.FileAttributes.Directory) ?
                 FileAttributes : FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
             FileNode.FileSecurity = SecurityDescriptor;
-            if (IntPtr.Zero != Ea)
+            if (IntPtr.Zero != ExtraBuffer)
             {
-                Result = SetEaEntries(FileNode, null, Ea, EaLength);
+                if (!ExtraBufferIsReparsePoint)
+                {
+                    Result = SetEaEntries(FileNode, null, ExtraBuffer, ExtraLength);
                     if (0 > Result)
                         return Result;
                 }
+                else
+                {
+                    Byte[] ReparseData = MakeReparsePoint(ExtraBuffer, ExtraLength);
+                    FileNode.FileInfo.FileAttributes |= (UInt32)System.IO.FileAttributes.ReparsePoint;
+                    FileNode.FileInfo.ReparseTag = GetReparseTag(ReparseData);
+                    FileNode.ReparseData = ReparseData;
+                }
+            }
             if (0 != AllocationSize)
             {
                 Result = SetFileSizeInternal(FileNode, AllocationSize, true);
@@ -549,6 +585,93 @@ namespace memfs
             Interlocked.Decrement(ref FileNode.OpenCount);
         }
 
+#if MEMFS_SLOWIO
+        private UInt64 Hash(UInt64 X)
+        {
+            X = (X ^ (X >> 30)) * 0xbf58476d1ce4e5b9ul;
+            X = (X ^ (X >> 27)) * 0x94d049bb133111ebul;
+            X = X ^ (X >> 31);
+            return X;
+        }
+
+        private static int Spin = 0;
+
+        private UInt64 PseudoRandom(UInt64 To)
+        {
+            /* John Oberschelp's PRNG */
+            Interlocked.Increment(ref Spin);
+            return Hash((UInt64)Spin) % To;
+        }
+
+        private bool SlowioReturnPending()
+        {
+            if (0 == SlowioMaxDelay)
+            {
+                return false;
+            }
+            return PseudoRandom(100) < SlowioPercentDelay;
+        }
+
+        private void SlowioSnooze()
+        {
+            double Millis = PseudoRandom(SlowioMaxDelay + 1) >> (int) PseudoRandom(SlowioRarefyDelay + 1);
+            Thread.Sleep(TimeSpan.FromMilliseconds(Millis));
+        }
+
+        private void SlowioReadTask(
+            Object FileNode0,
+            IntPtr Buffer,
+            UInt64 Offset,
+            UInt64 EndOffset,
+            UInt64 RequestHint)
+        {
+            SlowioSnooze();
+
+            UInt32 BytesTransferred = (UInt32)(EndOffset - Offset);
+            FileNode FileNode = (FileNode)FileNode0;
+            Marshal.Copy(FileNode.FileData, (int)Offset, Buffer, (int)BytesTransferred);
+
+            Host.SendReadResponse(RequestHint, STATUS_SUCCESS, BytesTransferred);
+            Interlocked.Decrement(ref SlowioTasksRunning);
+        }
+
+        private void SlowioWriteTask(
+            Object FileNode0,
+            IntPtr Buffer,
+            UInt64 Offset,
+            UInt64 EndOffset,
+            UInt64 RequestHint)
+        {
+            SlowioSnooze();
+
+            UInt32 BytesTransferred = (UInt32)(EndOffset - Offset);
+            FileNode FileNode = (FileNode)FileNode0;
+            FileInfo FileInfo = FileNode.GetFileInfo();
+            Marshal.Copy(Buffer, FileNode.FileData, (int)Offset, (int)BytesTransferred);
+
+            Host.SendWriteResponse(RequestHint, STATUS_SUCCESS, BytesTransferred, ref FileInfo);
+            Interlocked.Decrement(ref SlowioTasksRunning);
+        }
+
+        private void SlowioReadDirectoryTask(
+            Object FileNode0,
+            Object FileDesc,
+            String Pattern,
+            String Marker,
+            IntPtr Buffer,
+            UInt32 Length,
+            UInt64 RequestHint)
+        {
+            SlowioSnooze();
+
+            UInt32 BytesTransferred;
+            var Status = SeekableReadDirectory(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, out BytesTransferred);
+
+            Host.SendReadDirectoryResponse(RequestHint, Status, BytesTransferred);
+            Interlocked.Decrement(ref SlowioTasksRunning);
+        }
+#endif
+
         public override Int32 Read(
             Object FileNode0,
             Object FileDesc,
@@ -570,6 +693,25 @@ namespace memfs
             if (EndOffset > FileNode.FileInfo.FileSize)
                 EndOffset = FileNode.FileInfo.FileSize;
 
+#if MEMFS_SLOWIO
+            if (SlowioReturnPending())
+            {
+                var Hint = Host.GetOperationRequestHint();
+                try
+                {
+                    Interlocked.Increment(ref SlowioTasksRunning);
+                    Task.Run(() => SlowioReadTask(FileNode0, Buffer, Offset, EndOffset, Hint)).ConfigureAwait(false);
+
+                    BytesTransferred = 0;
+                    return STATUS_PENDING;
+                }
+                catch (Exception)
+                {
+                    Interlocked.Decrement(ref SlowioTasksRunning);
+                }
+            }
+#endif
+
             BytesTransferred = (UInt32)(EndOffset - Offset);
             Marshal.Copy(FileNode.FileData, (int)Offset, Buffer, (int)BytesTransferred);
 
@@ -619,6 +761,26 @@ namespace memfs
                 }
             }
 
+#if MEMFS_SLOWIO
+            if (SlowioReturnPending())
+            {
+                var hint = Host.GetOperationRequestHint();
+                try
+                {
+                    Interlocked.Increment(ref SlowioTasksRunning);
+                    Task.Run(() => SlowioWriteTask(FileNode0, Buffer, Offset, EndOffset, hint)).ConfigureAwait(false);
+
+                    BytesTransferred = 0;
+                    FileInfo = default(FileInfo);
+                    return STATUS_PENDING;
+                }
+                catch (Exception)
+                {
+                    Interlocked.Decrement(ref SlowioTasksRunning);
+                }
+            }
+#endif
+
             BytesTransferred = (UInt32)(EndOffset - Offset);
             Marshal.Copy(Buffer, FileNode.FileData, (int)Offset, (int)BytesTransferred);
 
@@ -902,6 +1064,37 @@ namespace memfs
             return false;
         }
 
+#if MEMFS_SLOWIO
+        public override int ReadDirectory(
+            Object FileNode0,
+            Object FileDesc,
+            String Pattern,
+            String Marker,
+            IntPtr Buffer,
+            UInt32 Length,
+            out UInt32 BytesTransferred)
+        {
+            if (SlowioReturnPending())
+            {
+                var Hint = Host.GetOperationRequestHint();
+                try
+                {
+                    Interlocked.Increment(ref SlowioTasksRunning);
+                    Task.Run(() => SlowioReadDirectoryTask(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, Hint));
+                    BytesTransferred = 0;
+
+                    return STATUS_PENDING;
+                }
+                catch (Exception)
+                {
+                    Interlocked.Decrement(ref SlowioTasksRunning);
+                }
+            }
+
+            return SeekableReadDirectory(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, out BytesTransferred);
+        }
+#endif
+
         public override int GetDirInfoByName(
             Object ParentNode0,
             Object FileDesc,
@@ -1140,6 +1333,10 @@ namespace memfs
         private FileNodeMap FileNodeMap;
         private UInt32 MaxFileNodes;
         private UInt32 MaxFileSize;
+        private UInt64 SlowioMaxDelay;
+        private UInt64 SlowioPercentDelay;
+        private UInt64 SlowioRarefyDelay;
+        private volatile Int32 SlowioTasksRunning;
         private String VolumeLabel;
     }
 
@@ -1170,6 +1367,9 @@ namespace memfs
                 UInt32 FileInfoTimeout = unchecked((UInt32)(-1));
                 UInt32 MaxFileNodes = 1024;
                 UInt32 MaxFileSize = 16 * 1024 * 1024;
+                UInt32 SlowioMaxDelay = 0;
+                UInt32 SlowioPercentDelay = 0;
+                UInt32 SlowioRarefyDelay = 0;
                 String FileSystemName = null;
                 String VolumePrefix = null;
                 String MountPoint = null;
@@ -1202,9 +1402,18 @@ namespace memfs
                     case 'm':
                         argtos(Args, ref I, ref MountPoint);
                         break;
+                    case 'M':
+                        argtol(Args, ref I, ref SlowioMaxDelay);
+                        break;
                     case 'n':
                         argtol(Args, ref I, ref MaxFileNodes);
                         break;
+                    case 'P':
+                        argtol(Args, ref I, ref SlowioPercentDelay);
+                        break;
+                    case 'R':
+                       argtol(Args, ref I, ref SlowioRarefyDelay);
+                       break;
                     case 'S':
                         argtos(Args, ref I, ref RootSddl);
                         break;
@@ -1233,7 +1442,8 @@ namespace memfs
                         throw new CommandLineUsageException("cannot open debug log file");
 
                 Host = new FileSystemHost(Memfs = new Memfs(
-                    CaseInsensitive, MaxFileNodes, MaxFileSize, RootSddl));
+                    CaseInsensitive, MaxFileNodes, MaxFileSize, RootSddl,
+                    SlowioMaxDelay, SlowioPercentDelay, SlowioRarefyDelay));
                 Host.FileInfoTimeout = FileInfoTimeout;
                 Host.Prefix = VolumePrefix;
                 Host.FileSystemName = null != FileSystemName ? FileSystemName : "-MEMFS";
@@ -1262,6 +1472,9 @@ namespace memfs
                     "    -t FileInfoTimeout  [millis]\n" +
                     "    -n MaxFileNodes\n" +
                     "    -s MaxFileSize      [bytes]\n" +
+                    "    -M MaxDelay         [maximum slow IO delay in millis]\n" +
+                    "    -P PercentDelay     [percent of slow IO to make pending]\n" +
+                    "    -R RarefyDelay      [adjust the rarity of pending slow IO]\n" +
                     "    -F FileSystemName\n" +
                     "    -S RootSddl         [file rights: FA, etc; NO generic rights: GA, etc.]\n" +
                     "    -u \\Server\\Share    [UNC prefix (single backslash)]\n" +

tst/memfs-fuse3/.gitignore

@@ -0,0 +1,10 @@
+build
+*.ncb
+*.suo
+*.vcproj.*
+*.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs
+*.exe
+*.install

tst/memfs-fuse3/Makefile

@@ -0,0 +1,18 @@
+usage:
+	@echo "make cygfuse3|winfsp-fuse3" 1>&2
+	@echo "" 1>&2
+	@echo "   cygfuse3        Link with CYGFUSE3" 1>&2
+	@echo "   winfsp-fuse3    Link with WinFsp-FUSE3" 1>&2
+	@exit 2
+
+cygfuse3: memfs-cygfuse3
+
+winfsp-fuse3: memfs-winfsp-fuse3
+
+memfs-cygfuse3: memfs-fuse3.cpp
+	g++ $^ -o $@ -g -Wall `pkg-config fuse3 --cflags --libs`
+
+memfs-winfsp-fuse3: export PKG_CONFIG_PATH=$(PWD)/winfsp.install/lib
+memfs-winfsp-fuse3: memfs-fuse3.cpp
+	ln -nsf "`regtool --wow32 get '/HKLM/Software/WinFsp/InstallDir' | cygpath -au -f -`" winfsp.install
+	g++ $^ -o $@ -g -Wall `pkg-config fuse3 --cflags --libs`

tst/memfs-fuse3/README.md

@@ -0,0 +1,7 @@
+`Memfs-fuse3` is an in-memory FUSE3 file system.
+
+It can be built with the following tools:
+
+- Using Visual Studio (`memfs-fuse3.sln`).
+- Using Cygwin GCC and linking directly with the WinFsp DLL (`make winfsp-fuse3`).
+- Using Cygwin GCC and linking to CYGFUSE3 (`make cygfuse3`).

tst/memfs-fuse3/compat.h

@@ -0,0 +1,104 @@
+/**
+ * @file compat.h
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#ifndef COMPAT_H_INCLUDED
+#define COMPAT_H_INCLUDED
+
+#if defined(_WIN32) && defined(FSP_FUSE_SYM)
+#include <winfsp/winfsp.h>
+#undef fuse_main
+#define fuse_main(argc, argv, ops, data)\
+    (FspLoad(0), fuse_main_real(argc, argv, ops, sizeof *(ops), data))
+#endif
+
+#if !defined(_WIN32) && !defined(fuse_stat)
+
+#define fuse_uid_t                      uid_t
+#define fuse_gid_t                      gid_t
+#define fuse_pid_t                      pid_t
+
+#define fuse_dev_t                      dev_t
+#define fuse_mode_t                     mode_t
+#define fuse_nlink_t                    nlink_t
+#define fuse_off_t                      off_t
+
+#define fuse_fsblkcnt_t                 fsblkcnt_t
+#define fuse_fsfilcnt_t                 fsfilcnt_t
+#define fuse_blksize_t                  blksize_t
+#define fuse_blkcnt_t                   blkcnt_t
+
+#define fuse_timespec                   timespec
+
+#define fuse_stat                       stat
+
+#define fuse_statvfs                    statvfs
+
+#define fuse_flock                      flock
+
+#define fuse_iovec                      iovec
+
+#endif
+
+#if !defined(S_IFMT)
+#define S_IFMT                          0170000
+#endif
+#if !defined(S_IFDIR)
+#define S_IFDIR                         0040000
+#endif
+#if !defined(S_IFCHR)
+#define S_IFCHR                         0020000
+#endif
+#if !defined(S_IFBLK)
+#define S_IFBLK                         0060000
+#endif
+#if !defined(S_IFREG)
+#define S_IFREG                         0100000
+#endif
+#if !defined(S_IFLNK)
+#define S_IFLNK                         0120000
+#endif
+#if !defined(S_IFSOCK)
+#define S_IFSOCK                        0140000
+#endif
+#if !defined(S_IFIFO)
+#define S_IFIFO                         0010000
+#endif
+
+#if defined(__APPLE__)
+#define st_atim                         st_atimespec
+#define st_ctim                         st_ctimespec
+#define st_mtim                         st_mtimespec
+#endif
+
+#if defined(__APPLE__) || defined(__linux__) || defined(__CYGWIN__)
+#include <sys/xattr.h>
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(_WIN32)
+#define XATTR_CREATE                    1
+#define XATTR_REPLACE                   2
+#endif
+
+#if !defined(ENOATTR)
+#define ENOATTR                         ENODATA
+#elif !defined(ENODATA)
+#define ENODATA                         ENOATTR
+#endif
+
+#endif

tst/memfs-fuse3/memfs-fuse3.cpp

@@ -0,0 +1,619 @@
+/**
+ * @file memfs-fuse3.c
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#include <cerrno>
+#include <chrono>
+#include <cstring>
+#include <algorithm>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include <fuse.h>
+#include "compat.h"
+
+class memfs
+{
+public:
+    memfs() : _ino(1), _root(std::make_shared<node_t>(_ino, S_IFDIR | 00777, 0, 0))
+    {
+    }
+
+    int main(int argc, char *argv[])
+    {
+        static fuse_operations ops =
+        {
+            getattr,
+            readlink,
+            mknod,
+            mkdir,
+            unlink,
+            rmdir,
+            symlink,
+            rename,
+            link,
+            chmod,
+            chown,
+            truncate,
+            open,
+            read,
+            write,
+            statfs,
+            flush,
+            release,
+            0, // fsync
+            setxattr,
+            getxattr,
+            listxattr,
+            removexattr,
+            opendir,
+            readdir,
+            releasedir,
+            0, // fsyncdir
+            init,
+            0, // destroy
+            0, // access
+            0, // create
+            0, // lock
+            utimens,
+            0, // bmap
+#if 0
+            ioctl,
+#endif
+        };
+        return fuse_main(argc, argv, &ops, this);
+    }
+
+private:
+    struct node_t
+    {
+        node_t(fuse_ino_t ino, fuse_mode_t mode, fuse_uid_t uid, fuse_gid_t gid, fuse_dev_t dev = 0)
+            : stat()
+        {
+            stat.st_ino = ino;
+            stat.st_mode = mode;
+            stat.st_nlink = 1;
+            stat.st_uid = uid;
+            stat.st_gid = gid;
+            stat.st_rdev = dev;
+            stat.st_atim = stat.st_mtim = stat.st_ctim = now();
+        }
+
+        void resize(size_t size, bool capacity)
+        {
+            if (capacity)
+            {
+                const size_t unit = 64 * 1024;
+                size_t newcap = (size + unit - 1) / unit * unit;
+                size_t oldcap = data.capacity();
+                if (newcap > oldcap)
+                    data.reserve(newcap);
+                else if (newcap < oldcap)
+                {
+                    data.resize(newcap);
+                    data.shrink_to_fit();
+                }
+            }
+            data.resize(size);
+            stat.st_size = size;
+        }
+
+        struct fuse_stat stat;
+        std::vector<uint8_t> data;
+        std::unordered_map<std::string, std::shared_ptr<node_t>> childmap;
+        std::unordered_map<std::string, std::vector<uint8_t>> xattrmap;
+    };
+
+    static fuse_timespec now()
+    {
+        using namespace std::chrono;
+        auto now = system_clock::now();
+        auto sec = floor<seconds>(now);
+        auto nsec = floor<nanoseconds>(now) - floor<nanoseconds>(sec);
+        return fuse_timespec
+        {
+            static_cast<decltype(fuse_timespec::tv_sec)>(sec.time_since_epoch().count()),
+                /* std::chrono epoch is UNIX epoch in C++20 */
+            static_cast<decltype(fuse_timespec::tv_nsec)>(nsec.count()),
+        };
+    }
+
+    static memfs *getself()
+    {
+        return static_cast<memfs *>(fuse_get_context()->private_data);
+    }
+
+    static int getattr(const char *path, struct fuse_stat *stbuf, struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        *stbuf = node->stat;
+        return 0;
+    }
+
+    static int readlink(const char *path, char *buf, size_t size)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path);
+        if (!node)
+            return -ENOENT;
+        if (S_IFLNK != (node->stat.st_mode & S_IFMT))
+            return EINVAL;
+        size = (std::min)(size - 1, node->data.size());
+        std::memcpy(buf, node->data.data(), size);
+        buf[size] = '\0';
+        return 0;
+    }
+
+    static int mknod(const char *path, fuse_mode_t mode, fuse_dev_t dev)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->make_node(path, mode, dev);
+    }
+
+    static int mkdir(const char *path, fuse_mode_t mode)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->make_node(path, S_IFDIR | (mode & 07777), 0);
+    }
+
+    static int unlink(const char *path)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->remove_node(path, false);
+    }
+
+    static int rmdir(const char *path)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->remove_node(path, true);
+    }
+
+    static int symlink(const char *dstpath, const char *srcpath)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->make_node(srcpath, S_IFLNK | 00777, 0, dstpath);
+    }
+
+    static int rename(const char *oldpath, const char *newpath, unsigned int flags)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto oldlookup = self->lookup_node(oldpath);
+        auto oldprnt = std::get<0>(oldlookup);
+        auto oldname = std::get<1>(oldlookup);
+        auto oldnode = std::get<2>(oldlookup);
+        if (!oldnode)
+            return -ENOENT;
+        auto newlookup = self->lookup_node(newpath);
+        auto newprnt = std::get<0>(newlookup);
+        auto newname = std::get<1>(newlookup);
+        auto newnode = std::get<2>(newlookup);
+        if (!newprnt)
+            return -ENOENT;
+        if (newname.empty())
+            // guard against directory loop creation
+            return -EINVAL;
+        if (oldprnt == newprnt && oldname == newname)
+            return 0;
+        if (newnode)
+        {
+            if (int errc = self->remove_node(newpath, S_IFDIR == (oldnode->stat.st_mode & S_IFMT)))
+                return errc;
+        }
+        oldprnt->childmap.erase(oldname);
+        newprnt->childmap[newname] = oldnode;
+        return 0;
+    }
+
+    static int link(const char *oldpath, const char *newpath)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto oldlookup = self->lookup_node(oldpath);
+        auto oldnode = std::get<2>(oldlookup);
+        if (!oldnode)
+            return -ENOENT;
+        auto newlookup = self->lookup_node(newpath);
+        auto newprnt = std::get<0>(newlookup);
+        auto newname = std::get<1>(newlookup);
+        auto newnode = std::get<2>(newlookup);
+        if (!newprnt)
+            return -ENOENT;
+        if (newnode)
+            return -EEXIST;
+        oldnode->stat.st_nlink++;
+        newprnt->childmap[newname] = oldnode;
+        oldnode->stat.st_ctim = newprnt->stat.st_ctim = newprnt->stat.st_mtim = now();
+        return 0;
+    }
+
+    static int chmod(const char *path, fuse_mode_t mode,
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        node->stat.st_mode = (node->stat.st_mode & S_IFMT) | (mode & 07777);
+        node->stat.st_ctim = now();
+        return 0;
+    }
+
+    static int chown(const char *path, fuse_uid_t uid, fuse_gid_t gid,
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        if (-1 != uid)
+            node->stat.st_uid = uid;
+        if (-1 != gid)
+            node->stat.st_gid = gid;
+        node->stat.st_ctim = now();
+        return 0;
+    }
+
+    static int truncate(const char *path, fuse_off_t size,
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        if (SIZE_MAX < size)
+            return -EFBIG;
+        node->resize(static_cast<size_t>(size), true);
+        node->stat.st_ctim = node->stat.st_mtim = now();
+        return 0;
+    }
+
+    static int open(const char *path, struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->open_node(path, false, fi);
+    }
+
+    static int read(const char *path, char *buf, size_t size, fuse_off_t off,
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        fuse_off_t endoff = (std::min)(
+            off + static_cast<fuse_off_t>(size), static_cast<fuse_off_t>(node->data.size()));
+        if (off > endoff)
+            return 0;
+        std::memcpy(buf, node->data.data() + off, static_cast<int>(endoff - off));
+        node->stat.st_atim = now();
+        return static_cast<int>(endoff - off);
+    }
+
+    static int write(const char *path, const char *buf, size_t size, fuse_off_t off,
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        fuse_off_t endoff = off + static_cast<fuse_off_t>(size);
+        if (SIZE_MAX < endoff)
+            return -EFBIG;
+        if (node->data.size() < endoff)
+            node->resize(static_cast<size_t>(endoff), true);
+        std::memcpy(node->data.data() + off, buf, static_cast<int>(endoff - off));
+        node->stat.st_ctim = node->stat.st_mtim = now();
+        return static_cast<int>(endoff - off);
+    }
+
+    static int statfs(const char *path, struct fuse_statvfs *stbuf)
+    {
+        std::memset(stbuf, 0, sizeof *stbuf);
+        return 0;
+    }
+
+    static int flush(const char *path, struct fuse_file_info *fi)
+    {
+        return -ENOSYS;
+    }
+
+    static int release(const char *path, struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->close_node(fi);
+    }
+
+    static int setxattr(const char *path, const char *name0, const char *value, size_t size,
+        int flags)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path);
+        if (!node)
+            return -ENOENT;
+        if (0 == std::strcmp("com.apple.ResourceFork", name0))
+            return -ENOTSUP;
+        std::string name = name0;
+        if (XATTR_CREATE == flags)
+        {
+            if (node->xattrmap.end() != node->xattrmap.find(name))
+                return -EEXIST;
+        }
+        else if (XATTR_REPLACE == flags)
+        {
+            if (node->xattrmap.end() == node->xattrmap.find(name))
+                return -ENOATTR;
+        }
+        node->xattrmap[name].assign(value, value + size);
+        return 0;
+    }
+
+    static int getxattr(const char *path, const char *name0, char *value, size_t size)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path);
+        if (!node)
+            return -ENOENT;
+        if (0 == std::strcmp("com.apple.ResourceFork", name0))
+            return -ENOTSUP;
+        std::string name = name0;
+        auto iter = node->xattrmap.find(name);
+        if (node->xattrmap.end() == iter)
+            return -ENOATTR;
+        if (0 != size)
+        {
+            if (iter->second.size() > size)
+                return -ERANGE;
+            std::memcpy(value, iter->second.data(), iter->second.size());
+        }
+        return static_cast<int>(iter->second.size());
+    }
+
+    static int listxattr(const char *path, char *namebuf, size_t size)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path);
+        if (!node)
+            return -ENOENT;
+        size_t copysize = 0;
+        for (auto elem : node->xattrmap)
+        {
+            size_t namesize = elem.first.size() + 1;
+            if (0 != size)
+            {
+                if (copysize + namesize > size)
+                    return -ERANGE;
+                std::memcpy(namebuf + copysize, elem.first.c_str(), namesize);
+                copysize += namesize;
+            }
+        }
+        return static_cast<int>(copysize);
+    }
+
+    static int removexattr(const char *path, const char *name0)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path);
+        if (!node)
+            return -ENOENT;
+        if (0 == std::strcmp("com.apple.ResourceFork", name0))
+            return -ENOTSUP;
+        std::string name = name0;
+        return node->xattrmap.erase(name) ? 0 : -ENOATTR;
+    }
+
+    static int opendir(const char *path, struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->open_node(path, true, fi);
+    }
+
+    static int readdir(const char *path, void *buf, fuse_fill_dir_t filler, fuse_off_t off,
+        struct fuse_file_info *fi, enum fuse_readdir_flags)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        filler(buf, ".", &node->stat, 0, FUSE_FILL_DIR_PLUS);
+        filler(buf, "..", nullptr, 0, FUSE_FILL_DIR_PLUS);
+        for (auto elem : node->childmap)
+            if (0 != filler(buf, elem.first.c_str(), &elem.second->stat, 0, FUSE_FILL_DIR_PLUS))
+                break;
+        return 0;
+    }
+
+    static int releasedir(const char *path, struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        return self->close_node(fi);
+    }
+
+    static void *init(struct fuse_conn_info *conn,
+        struct fuse_config *conf)
+    {
+        conn->want |= (conn->capable & FUSE_CAP_READDIRPLUS);
+        return getself();
+    }
+
+    static int utimens(const char *path, const struct fuse_timespec tmsp[2],
+        struct fuse_file_info *fi)
+    {
+        auto self = getself();
+        std::lock_guard<std::mutex> lock(self->_mutex);
+        auto node = self->get_node(path, fi);
+        if (!node)
+            return -ENOENT;
+        if (tmsp)
+        {
+            node->stat.st_ctim = now();
+            node->stat.st_atim = tmsp[0];
+            node->stat.st_mtim = tmsp[1];
+        }
+        else
+            node->stat.st_ctim = node->stat.st_atim = node->stat.st_mtim = now();
+        return 0;
+    }
+
+#if 0
+    static int ioctl(const char *path, int cmd, void *arg, struct fuse_file_info *fi,
+        unsigned int flags, void *data)
+    {
+        return -ENOSYS;
+    }
+#endif
+
+    std::tuple<std::shared_ptr<node_t>, std::string, std::shared_ptr<node_t>>
+        lookup_node(const char *path, node_t *ancestor = nullptr)
+    {
+        auto prnt = _root;
+        std::string name;
+        auto node = prnt;
+        for (const char *part = path, *p; *part; part = p + !!(*p))
+        {
+            for (p = part; *p && '/' != *p; p++)
+                ;
+            if (part == p)
+                continue;
+            prnt = node;
+            if (!node)
+                break;
+            name.assign(part, p);
+            auto iter = node->childmap.find(name);
+            node = node->childmap.end() != iter ? iter->second : nullptr;
+            if (ancestor && node.get() == ancestor)
+            {
+                name.assign(""); // special case loop condition
+                break;
+            }
+        }
+        return std::make_tuple(prnt, name, node);
+    }
+
+    int make_node(const char *path, fuse_mode_t mode, fuse_dev_t dev, const char *data = nullptr)
+    {
+        auto lookup = lookup_node(path);
+        auto prnt = std::get<0>(lookup);
+        auto name = std::get<1>(lookup);
+        auto node = std::get<2>(lookup);
+        if (!prnt)
+            return -ENOENT;
+        if (node)
+            return -EEXIST;
+        fuse_context *context = fuse_get_context();
+        node = std::make_shared<node_t>(++_ino, mode, context->uid, context->gid, dev);
+        if (data)
+        {
+            node->resize(std::strlen(data), false);
+            std::memcpy(node->data.data(), data, node->data.size());
+        }
+        prnt->childmap[name] = node;
+        prnt->stat.st_ctim = prnt->stat.st_mtim = node->stat.st_ctim;
+        return 0;
+    }
+
+    int remove_node(const char *path, bool dir)
+    {
+        auto lookup = lookup_node(path);
+        auto prnt = std::get<0>(lookup);
+        auto name = std::get<1>(lookup);
+        auto node = std::get<2>(lookup);
+        if (!node)
+            return -ENOENT;
+        if (!dir && S_IFDIR == (node->stat.st_mode & S_IFMT))
+            return -EISDIR;
+        if (dir && S_IFDIR != (node->stat.st_mode & S_IFMT))
+            return -ENOTDIR;
+        if (0 < node->childmap.size())
+            return -ENOTEMPTY;
+        node->stat.st_nlink--;
+        prnt->childmap.erase(name);
+        node->stat.st_ctim = prnt->stat.st_ctim = prnt->stat.st_mtim = now();
+        return 0;
+    }
+
+    int open_node(const char *path, bool dir, struct fuse_file_info *fi)
+    {
+        auto node = std::get<2>(lookup_node(path));
+        if (!node)
+            return -ENOENT;
+        if (!dir && S_IFDIR == (node->stat.st_mode & S_IFMT))
+            return -EISDIR;
+        if (dir && S_IFDIR != (node->stat.st_mode & S_IFMT))
+            return -ENOTDIR;
+        // A file descriptor is a raw pointer to a shared_ptr.
+        // This has the effect of incrementing the shared_ptr
+        // refcount, thus keeping an open node around even
+        // if the node is unlinked.
+        fi->fh = (uint64_t)(uintptr_t)new std::shared_ptr<node_t>(node);
+        return 0;
+    }
+
+    int close_node(struct fuse_file_info *fi)
+    {
+        delete (std::shared_ptr<node_t> *)(uintptr_t)fi->fh;
+        return 0;
+    }
+
+    std::shared_ptr<node_t> get_node(const char *path, struct fuse_file_info *fi = nullptr)
+    {
+        if (!fi)
+            return std::get<2>(lookup_node(path));
+        else
+            return *(std::shared_ptr<node_t> *)(uintptr_t)fi->fh;
+    }
+
+private:
+    std::mutex _mutex;
+    fuse_ino_t _ino;
+    std::shared_ptr<node_t> _root;
+};
+
+int main(int argc, char *argv[])
+{
+    return memfs().main(argc, argv);
+}

tst/memfs-fuse3/memfs-fuse3.sln

@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "memfs-fuse3", "memfs-fuse3.vcxproj", "{CF538F42-C714-4653-B351-E72FD7B0B217}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Debug|x64.ActiveCfg = Debug|x64
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Debug|x64.Build.0 = Debug|x64
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Debug|x86.ActiveCfg = Debug|Win32
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Debug|x86.Build.0 = Debug|Win32
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Release|x64.ActiveCfg = Release|x64
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Release|x64.Build.0 = Release|x64
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Release|x86.ActiveCfg = Release|Win32
+		{CF538F42-C714-4653-B351-E72FD7B0B217}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

tst/memfs-fuse3/memfs-fuse3.vcxproj

@@ -0,0 +1,189 @@
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+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
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+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
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+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{CF538F42-C714-4653-B351-E72FD7B0B217}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>memfsfuse3</RootNamespace>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
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+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <DisableSpecificWarnings>4018</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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+      <WarningLevel>Level3</WarningLevel>
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+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <DisableSpecificWarnings>4018</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4018</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4018</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="compat.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="memfs-fuse3.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

tst/memfs-fuse3/memfs-fuse3.vcxproj.filters

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="compat.h">
+      <Filter>Source</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="memfs-fuse3.cpp">
+      <Filter>Source</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>

tst/memfs/memfs.cpp

@@ -69,6 +69,11 @@ FSP_FSCTL_STATIC_ASSERT(MEMFS_MAX_PATH > MAX_PATH,
  */
 #define MEMFS_EA
 
+/*
+ * Define the MEMFS_WSL macro to include WSLinux support.
+ */
+#define MEMFS_WSL
+
  /*
  * Define the DEBUG_BUFFER_CHECK macro on Windows 8 or above. This includes
  * a check for the Write buffer to ensure that it is read-only.
@@ -1047,8 +1052,8 @@ static NTSTATUS GetSecurityByName(FSP_FILE_SYSTEM *FileSystem,
 static NTSTATUS Create(FSP_FILE_SYSTEM *FileSystem,
     PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
     UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
-#if defined(MEMFS_EA)
-    PFILE_FULL_EA_INFORMATION Ea, ULONG EaLength,
+#if defined(MEMFS_EA) || defined(MEMFS_WSL)
+    PVOID ExtraBuffer, ULONG ExtraLength, BOOLEAN ExtraBufferIsReparsePoint,
 #endif
     PVOID *PFileNode, FSP_FSCTL_FILE_INFO *FileInfo)
 {
@@ -1129,10 +1134,14 @@ static NTSTATUS Create(FSP_FILE_SYSTEM *FileSystem,
         memcpy(FileNode->FileSecurity, SecurityDescriptor, FileNode->FileSecuritySize);
     }
 
-#if defined(MEMFS_EA)
-    if (0 != Ea)
+#if defined(MEMFS_EA) || defined(MEMFS_WSL)
+    if (0 != ExtraBuffer)
     {
-        Result = FspFileSystemEnumerateEa(FileSystem, MemfsFileNodeSetEa, FileNode, Ea, EaLength);
+#if defined(MEMFS_EA)
+        if (!ExtraBufferIsReparsePoint)
+        {
+            Result = FspFileSystemEnumerateEa(FileSystem, MemfsFileNodeSetEa, FileNode,
+                (PFILE_FULL_EA_INFORMATION)ExtraBuffer, ExtraLength);
             if (!NT_SUCCESS(Result))
             {
                 MemfsFileNodeDelete(FileNode);
@@ -1140,6 +1149,30 @@ static NTSTATUS Create(FSP_FILE_SYSTEM *FileSystem,
             }
         }
 #endif
+#if defined(MEMFS_WSL)
+        if (ExtraBufferIsReparsePoint)
+        {
+#if defined(MEMFS_REPARSE_POINTS)
+            FileNode->ReparseDataSize = ExtraLength;
+            FileNode->ReparseData = malloc(ExtraLength);
+            if (0 == FileNode->ReparseData && 0 != ExtraLength)
+            {
+                MemfsFileNodeDelete(FileNode);
+                return STATUS_INSUFFICIENT_RESOURCES;
+            }
+
+            FileNode->FileInfo.FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
+            FileNode->FileInfo.ReparseTag = *(PULONG)ExtraBuffer;
+                /* the first field in a reparse buffer is the reparse tag */
+            memcpy(FileNode->ReparseData, ExtraBuffer, ExtraLength);
+#else
+            MemfsFileNodeDelete(FileNode);
+            return STATUS_INVALID_PARAMETER;
+#endif
+        }
+#endif
+    }
+#endif
 
     FileNode->FileInfo.AllocationSize = AllocationSize;
     if (0 != FileNode->FileInfo.AllocationSize)
@@ -2189,7 +2222,7 @@ static FSP_FILE_SYSTEM_INTERFACE MemfsInterface =
     GetVolumeInfo,
     SetVolumeLabel,
     GetSecurityByName,
-#if defined(MEMFS_EA)
+#if defined(MEMFS_EA) || defined(MEMFS_WSL)
     0,
 #else
     Create,
@@ -2240,8 +2273,10 @@ static FSP_FILE_SYSTEM_INTERFACE MemfsInterface =
     0,
 #endif
     0,
-#if defined(MEMFS_EA)
+#if defined(MEMFS_EA) || defined(MEMFS_WSL)
     Create,
+#endif
+#if defined(MEMFS_EA)
     Overwrite,
     GetEa,
     SetEa
@@ -2347,6 +2382,9 @@ NTSTATUS MemfsCreateFunnel(
 #endif
 #if defined(MEMFS_EA)
     VolumeParams.ExtendedAttributes = 1;
+#endif
+#if defined(MEMFS_WSL)
+    VolumeParams.WslFeatures = 1;
 #endif
     VolumeParams.AllowOpenInKernelMode = 1;
     if (0 != VolumePrefix)

tst/passthrough-cpp/.gitignore

@@ -3,3 +3,6 @@ build
 *.suo
 *.vcproj.*
 *.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs

tst/passthrough-cpp/passthrough-cpp.vcxproj

@@ -22,32 +22,32 @@
     <ProjectGuid>{E8A4060D-E6A4-42CC-9BCA-DC82E6EDB2C5}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>passthroughcpp</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

tst/passthrough-dotnet/.gitignore

@@ -4,3 +4,6 @@ build
 *.vcproj.*
 *.vcxproj.user
 *.csproj.user
+*.VC.db
+*.VC.opendb
+.vs

tst/passthrough-fuse/.gitignore

@@ -3,5 +3,8 @@ build
 *.suo
 *.vcproj.*
 *.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs
 *.exe
 *.install

tst/passthrough-fuse/passthrough-fuse.vcxproj

@@ -22,32 +22,32 @@
     <ProjectGuid>{C753851C-142F-4AAD-B2F7-CBF905C2A600}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>passthroughfuse</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

tst/passthrough-fuse3/.gitignore

@@ -3,5 +3,8 @@ build
 *.suo
 *.vcproj.*
 *.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs
 *.exe
 *.install

tst/passthrough-fuse3/passthrough-fuse3.vcxproj

@@ -22,32 +22,32 @@
     <ProjectGuid>{5E99498C-D30C-48EF-A04A-7977C0305FAC}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>passthroughfuse3</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

tst/passthrough/.gitignore

@@ -3,3 +3,6 @@ build
 *.suo
 *.vcproj.*
 *.vcxproj.user
+*.VC.db
+*.VC.opendb
+.vs

tst/passthrough/passthrough.vcxproj

@@ -25,32 +25,32 @@
     <ProjectGuid>{9E0E5997-7316-4818-A130-00B3AF1AD354}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>passthrough</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>$(LatestTargetPlatformVersion)</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>