update Changelog for 2020.1 B1

Fix junction handling.

Changelog.asciidoc

@@ -1,5 +1,151 @@
 = Changelog
 
+v1.7B1 (2020.1 B1)::
+
+Changes since v1.6:
+
+* [FIX] Workaround an incompatibility with Avast Antivirus. (GitHub issue #221.)
+* [FIX] Fix junction (mount point reparse point) handling. (GitHub issue #269.)
+
+
+v1.6 (2020)::
+
+Changes since v1.5:
+
+* [FIX] Do no pass `O_APPEND` flag to FUSE file systems, which would result in data corruption under some circumstances. (See PR #272. Thanks @pfrejo.)
+* [FIX] Fix how rename target directories are opened (use `FILE_DIRECTORY_FILE`). (See PR #270. Thanks @hammerg.)
+
+
+v1.5 (2019.3)::
+
+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.
+
+
+v1.5B4 (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)::
 
@@ -11,6 +157,7 @@ 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 +56,15 @@ 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
+|Gal Hammer (Red Hat, https://www.redhat.com)                   |ghammer at redhat.com
 |John Oberschelp                                                |john at oberschelp.net
+|John Tyner                                                     |jtyner at gmail.com
+|Pedro Frejo (Arpa System, https://arpasystem.com)              |pedro.frejo at arpasystem.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.cpp

@@ -1,7 +1,7 @@
 /**
  * @file CustomActions.cpp
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

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"
@@ -750,4 +820,4 @@
             </ScheduleReboot>
         </InstallExecuteSequence>
     </Product>
-</Wix>
+</Wix>

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>
@@ -100,14 +101,13 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MEMFS_STANDALONE;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>..\..\..\src;..\..\..\inc</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
   </ItemDefinitionGroup>
@@ -117,14 +117,13 @@
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MEMFS_STANDALONE;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>..\..\..\src;..\..\..\inc</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
     </Link>
   </ItemDefinitionGroup>
@@ -136,14 +135,13 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MEMFS_STANDALONE;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>..\..\..\src;..\..\..\inc</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <StripPrivateSymbols>$(OutDir)$(TargetName).public.pdb</StripPrivateSymbols>
@@ -157,14 +155,13 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MEMFS_STANDALONE;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <AdditionalIncludeDirectories>..\..\..\src;..\..\..\inc</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </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>
+        <MyCanonicalVersion>1.7</MyCanonicalVersion>
 
-        <MyProductVersion>2019.3 B1</MyProductVersion>
+        <MyProductVersion>2020.1 B1</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/Home.md

@@ -12,6 +12,7 @@ The documentation available here discusses various aspects of WinFsp.
 - The [[API Reference|WinFsp-API-winfsp.h]] describes the native WinFsp API. This external [[link|http://www.secfs.net/winfsp/apiref/]] may be easier to browse for some people.
 - There is also a FUSE compatibility layer for native Windows and Cygwin. See fuse.h in the source repository.
 - This [[document|Native-API-vs-FUSE]] discusses the need for both a native API and FUSE and gives some pointers on which one to choose.
+- Since release 2019.3 WinFsp supports development of file systems in kernel mode. This [[document|WinFsp-Kernel-Mode-File-Systems]] discusses how to write such file systems.
 
 ## Design
 

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

doc/WinFsp-Kernel-Mode-File-Systems.asciidoc

@@ -0,0 +1,117 @@
+= Developing File Systems in Kernel Mode
+
+Since release 2019.3 WinFsp supports development of file systems in kernel mode. Such file systems are implemented as kernel drivers that use WinFsp as the primary FSD (File System Driver) as well as the software library that they interface with to retrieve and service file system requests. This document discusses how to write such file systems.
+
+== Motivation
+
+The primary goal of WinFsp is to enable the easy creation of *user mode* file systems using an easy to use API. There are however legitimate reasons for wanting to develop a file system as a *kernel mode* driver, but the difficulty of doing so often deters people because Windows kernel file system development is notoriously difficult and has many pitfalls.
+
+Some of the reasons that a kernel mode file system may be preferrable to a user mode one:
+
+* A kernel driver may be able to achieve better performance than user mode processes.
+* A kernel driver may be able to access advanced OS features that are not easily available to user mode processes.
+* A kernel driver may be able to present an alternative interface than the one presented by WinFsp to user mode processes.
+
+Since release 2019.3 WinFsp supports development of file systems as kernel mode drivers. The primary motivation for this work was to support the https://github.com/billziss-gh/winfuse[WinFuse] project, which exposes the FUSE protocol from the Windows kernel in a way that allows FUSE file systems to interface with it, either directly or via https://github.com/libfuse/libfuse[libfuse]. The support was added in such a way that it is generic enough to be used by other kernel mode file systems.
+
+== Overview
+
+A WinFsp "volume" (file system) is typically created using the `FspFsctlCreateVolume` API. This is simply a wrapper around a `CreateFileW` call on one of the WinFsp control devices, either `WinFsp.Disk` or `WinFsp.Net`. The `CreateFileW` call returns a `HANDLE` to the newly created volume, which acts either as a "disk" or a "network" file system, depending on which control device was used to create it.
+
+User mode file systems interact with the WinFsp FSD via `DeviceIoControl/FSP_FSCTL_TRANSACT` messages on the volume `HANDLE`. (This is usually done indirectly via the WinFsp DLL, which hides this detail behind an easy to use API.)
+
+Since release 2019.3 (v1.5) WinFsp supports the following:
+
+* Registration and on-demand loading of a third party driver when a volume that is destined to be handled by the third party driver is created.
+* Forwarding of custom `DeviceIoControl` messages to a third party driver. This allows the third party driver to handle custom `FSCTL` requests directed to a WinFsp volume `HANDLE`.
+* Kernel-mode API's (called DDI's) that allow a third party driver to register itself with the FSD and interact with its I/O queues.
+
+Such drivers are called within the WinFsp sources and header/library files by the name of "Fsext Providers" (File System Extension Providers). In the text below we will usually refer to them as simply "Providers".
+
+A Provider is a kernel mode driver that uses the FSD as a frontend file system driver to interface with Windows and implement all the complex details that this entails. The Provider fetches I/O requests from the WinFsp I/O queues and may filter them, transform them into a different protocol (as is the case with WinFuse) or use them to fully implement a file system in kernel mode.
+
+== Provider Development
+
+The WinFsp installer includes a "Kernel Developer" feature. When installed this feature adds header and library files in the `opt\fsext` installation subdirectory.
+
+The primary header file used for Provider development is `<winfsp/fsext.h>` and can be found in `opt\fsext\inc`. Additionally the file `<winfsp/fsctl.h>` found in the `inc` installation subdirectory must be in the compiler's include path.
+
+Providers must also be linked with one of the import libraries that can be found in `opt\fsext\lib`. Use the `winfsp-x64.lib` import library when linking the 64-bit version of a Provider and the `winfsp-x86.lib` import library when linking the 32-bit version of a Provider.
+
+=== Provider DDI's
+
+The `<winfsp/fsext.h>` header file includes definitions for the following important DDI's:
+
+* `FspFsextProviderRegister`: This DDI is used by a Provider to register itself with the FSD. Typically the Provider prepares an `FSP_FSEXT_PROVIDER` structure and calls `FspFsextProviderRegister` in its `DriverEntry` routine. The structure's fields are as follows:
+** `Version`: Set to `sizeof(FSP_FSEXT_PROVIDER)`.
+** `DeviceTransactCode`: The `DeviceIoControl` code that should be forwarded to the Provider.
+*** The code must be defined as follows: `CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0xC00 + ProviderSpecific, METHOD_BUFFERED, FILE_ANY_ACCESS)`.
+*** Please note that this scheme allows for up to 1024 codes. If you want to define a new Provider code I will appreciate it if you email me at `<billziss at navimatics.com>` so that we can keep track of Provider codes, avoid conflicts and see when we need to extend this scheme.
+** `DeviceExtensionSize`: The size of private data that the Provider wants for itself in the `DeviceExtension` of the FSD volume's device object.
+** `DeviceInit`: Called when a new volume is created. The `DeviceObject` parameter is the volume's device object. The `VolumeParams` are the initial parameters passed to `FspFsctlCreateVolume` and can be modified by the Provider.
+** `DeviceFini`: Called when a volume is going away. This usually happens when the volume `HANDLE` is closed.
+** `DeviceExpirationRoutine`: Called once a second as part of the FSD's expiration timer. The FSD uses this timer to expire caches, long-pending IRP's, etc. A Provider can use this call for a similar purpose. The `ExpirationTime` parameter contains the current interrupt time as determined by the FSD.
+** `DeviceTransact`: Called whenever the FSD receives a `DeviceIoControl` request with the `DeviceTransactCode`. The `Irp` parameter contains the relevant `IRP_MJ_FILE_SYSTEM_CONTROL`.
+** `DeviceExtensionOffset`: Set to `0` on input. On successful return from `FspFsextProviderRegister` it will contain the offset to use for accessing the Provider's private data in the `DeviceExtension` of the FSD volume's device object. Given a `DeviceObject`, the data can be accessed as `(PVOID)((PUINT8)DeviceObject->DeviceExtension + Provider.DeviceExtensionOffset)`.
+* `FspFsextProviderTransact`: This DDI is used by a Provider to interact with the FSD I/O queues. The `DeviceObject` is the FSD volume's device object. The `FileObject` is the `FILE_OBJECT` that corresponds to the volume `HANDLE` (created by `FspFsctlCreateVolume`). The `Response` is the response to send and can be `NULL`. The `Request` is a pointer that receives a pointer to a new request from the WinFsp I/O queue and can be `NULL`; if the received pointer is not `NULL` it must be freed with `ExFreePool`.
+
+=== Provider I/O
+
+When the FSD receives a file system IRP it is often able to handle and complete it without help from an external user mode or kernel mode file system. However in most cases the IRP has to be seen and acted upon by an external file system. For this reason the FSD preprocesses the IRP and places it in an I/O queue in the form of a "request". At a later time the external file system retrieves the request, processes it and sends back a "response". The FSD uses the response to locate the original IRP, perform any necessary postprocessing and finally complete the IRP.
+
+Providers typically use the `FspFsextProviderTransact` DDI to receive requests and send back responses. Requests are of type `FSP_FSCTL_TRANSACT_REQ` and responses are of type `FSP_FSCTL_TRANSACT_RSP`. Requests have a `Kind` field which describes what kind of file system operation is being requested. The following request kinds are currently defined in `<winfsp/fsctl.h>`:
+
+```
+    FspFsctlTransactCreateKind,
+    FspFsctlTransactOverwriteKind,
+    FspFsctlTransactCleanupKind,
+    FspFsctlTransactCloseKind,
+    FspFsctlTransactReadKind,
+    FspFsctlTransactWriteKind,
+    FspFsctlTransactQueryInformationKind,
+    FspFsctlTransactSetInformationKind,
+    FspFsctlTransactQueryEaKind,
+    FspFsctlTransactSetEaKind,
+    FspFsctlTransactFlushBuffersKind,
+    FspFsctlTransactQueryVolumeInformationKind,
+    FspFsctlTransactSetVolumeInformationKind,
+    FspFsctlTransactQueryDirectoryKind,
+    FspFsctlTransactFileSystemControlKind,
+    FspFsctlTransactDeviceControlKind,
+    FspFsctlTransactShutdownKind,
+    FspFsctlTransactLockControlKind,
+    FspFsctlTransactQuerySecurityKind,
+    FspFsctlTransactSetSecurityKind,
+    FspFsctlTransactQueryStreamInformationKind,
+```
+
+When request processing is complete the Provider must prepare a response and send it to the FSD using `FspFsextProviderTransact` as mentioned above. It is particularly important that the Provider initializes the `Kind` and `Hint` fields by copying the values from the corresponding request.
+
+This document does not describe in detail how each request kind is supposed to be handled. For the full details refer to the implementation for the WinFsp DLL in the WinFsp sources: `src/dll/fsop.c`. Although this implementation is for user mode file systems, similar logic and techniques should be used for Providers.
+
+== Provider Registration
+
+Providers are loaded on demand and must be properly registered:
+
+* A provider must be registered as a kernel driver. This can be achieved by using the command `sc create PROVIDER type=kernel binPath=X:\PATH\TO\PROVIDER.SYS` or by using the Service Control Manager API's (`OpenServiceW`, `CreateServiceW`, etc.). You do not need an INF file or to use the Setup API in order to register a Provider driver.
+* A provider must be registered under the registry key `HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\WinFsp\Fsext`. Create a string value with name the textual representation of the Provider's transact code (see `DeviceTransactCode`) in `"%08lx"` format and value the Provider's driver name.
+
+For example the WinFuse Provider registers its driver under the name `WinFuse` and adds a registry value of `00093118` -> `WinFuse`.
+
+== Provider Lifetime
+
+Providers are loaded on demand by the FSD during volume creation. This process works as follows:
+
+* During volume creation (e.g. by using `FspFsctlCreateVolume`) a non-zero `FsextControlCode` must be specified in `VolumeParams`.
+* If the FSD sees the `FsextControlCode` as non-zero it attempts to find a corresponding Provider driver.
+** It first checks an internal mapping of codes to Provider drivers. If the code is found, the FSD proceeds to the `DeviceInit` step below.
+** If the code is not found in the internal mapping, the FSD checks the registry under the registry key `HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\WinFsp\Fsext`. If the code is not found the volume creation fails.
+** If the code is found the FSD loads the Provider driver using `ZwLoadDriver`. The Provider is supposed to register itself with the FSD during `DriverEntry` by calling `FspFsextProviderRegister`.
+** Finally the internal mapping of codes to Providers is rechecked. Assuming that everything worked as intended, the corresponding Provider driver is now loaded and we can proceed to the `DeviceInit` step.
+* The FSD proceeds to call the `DeviceInit` callback of the Provider. The Provider can use this call to initialize itself in relation to the new volume device object.
+* Assuming that the volume device object is created successfully, the FSD will do the following:
+** Forward any `FsextControlCode==DeviceTransactCode` requests that it gets in its `IRP_MJ_FILE_SYSTEM_CONTROL` to the Provider via `DeviceTransact`.
+** Call the Provider's `DeviceExpirationRoutine` once a second as part of the FSD's expiration process.
+* Eventually the volume device object will be torn down (e.g. because the corresponding `HANDLE` is closed). In this case the FSD will call the Provider's `DeviceFini` callback.
+
+Finally note that once loaded a Provider driver cannot be unloaded (without a reboot).

ext/tlib/callstack.c

@@ -1,7 +1,7 @@
 /**
  * @file tlib/callstack.c
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #include <tlib/callstack.h>

ext/tlib/callstack.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/callstack.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #ifndef TLIB_CALLSTACK_H_INCLUDED

ext/tlib/injected/allfunc.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injected/allfunc.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #ifndef TLIB_INJECTED_ALLFUNC_H_INCLUDED

ext/tlib/injected/curlfunc.c

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injected/curlfunc.c
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #include <tlib/injected/curlfunc.h>

ext/tlib/injected/curlfunc.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injected/curlfunc.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #ifndef TLIB_INJECTED_CURLFUNC_H_INCLUDED

ext/tlib/injected/stdfunc.c

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injected/stdfunc.c
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #include <tlib/injected/stdfunc.h>

ext/tlib/injected/stdfunc.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injected/stdfunc.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #ifndef TLIB_INJECTED_STDFUNC_H_INCLUDED

ext/tlib/injection.c

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injection.c
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #include <tlib/injection.h>

ext/tlib/injection.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/injection.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 /* NOTE: This header may usefully be included multiple times.

ext/tlib/testsuite.c

@@ -1,7 +1,7 @@
 /**
  * @file tlib/testsuite.c
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #include <tlib/testsuite.h>

ext/tlib/testsuite.h

@@ -1,7 +1,7 @@
 /**
  * @file tlib/testsuite.h
  *
- * @copyright 2014-2019 Bill Zissimopoulos
+ * @copyright 2014-2020 Bill Zissimopoulos
  */
 
 #ifndef TLIB_TESTSUITE_H_INCLUDED

inc/fuse/fuse.h

@@ -6,7 +6,7 @@
  *     FUSE: Filesystem in Userspace
  *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse/fuse_common.h

@@ -6,7 +6,7 @@
  *     FUSE: Filesystem in Userspace
  *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse/fuse_opt.h

@@ -6,7 +6,7 @@
  *     FUSE: Filesystem in Userspace
  *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse/winfsp_fuse.h

@@ -2,7 +2,7 @@
  * @file fuse/winfsp_fuse.h
  * WinFsp FUSE compatible API.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse3/fuse.h

@@ -6,7 +6,7 @@
  *     FUSE: Filesystem in Userspace
  *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse3/fuse_common.h

@@ -6,7 +6,7 @@
  *     FUSE: Filesystem in Userspace
  *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse3/fuse_opt.h

@@ -2,7 +2,7 @@
  * @file fuse3/fuse_opt.h
  * WinFsp FUSE3 compatible API.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/fuse3/winfsp_fuse.h

@@ -2,7 +2,7 @@
  * @file fuse3/winfsp_fuse.h
  * WinFsp FUSE3 compatible API.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/winfsp/fsctl.h

@@ -1,7 +1,7 @@
 /**
  * @file winfsp/fsctl.h
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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 +174,10 @@ 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 RejectIrpPriorToTransact0:1;     /* reject IRP's prior to FspFsctlTransact with 0 buffers */\
+    UINT32 KmReservedFlags:3;\
     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 +193,8 @@ 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 +244,12 @@ typedef struct
 {
     UINT16 Size;
     FSP_FSCTL_FILE_INFO FileInfo;
-    UINT8 Padding[24];
+    union
-        /* make struct as big as FILE_ID_BOTH_DIR_INFORMATION; allows for in-place copying */
+    {
+        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 +291,7 @@ 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 +300,7 @@ 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 +601,13 @@ 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 +616,20 @@ 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/launch.h

@@ -5,7 +5,7 @@
  * In order to use the WinFsp Launch API a program must include <winfsp/launch.h>
  * and link with the winfsp_x64.dll (or winfsp_x86.dll) library.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

inc/winfsp/winfsp.h

@@ -5,7 +5,7 @@
  * In order to use the WinFsp API the user mode file system must include <winfsp/winfsp.h>
  * and link with the winfsp_x64.dll (or winfsp_x86.dll) library.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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
+     * @param ExtraBuffer
-     *     Extended attributes buffer.
+     *     Extended attributes or reparse point buffer.
-     * @param EaLength
+     * @param ExtraLength
-     *     Extended attributes buffer length.
+     *     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.

inc/winfsp/winfsp.hpp

@@ -2,7 +2,7 @@
  * @file winfsp/winfsp.hpp
  * WinFsp C++ Layer.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

opt/cygfuse/fuse/cygfuse.c

@@ -1,7 +1,7 @@
 /**
  * @file fuse/cygfuse.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

opt/cygfuse/fuse3/cygfuse.c

@@ -1,7 +1,7 @@
 /**
  * @file fuse3/cygfuse.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

opt/fsext/inc/winfsp/fsext.h

@@ -0,0 +1,96 @@
+/**
+ * @file winfsp/fsext.h
+ *
+ * @copyright 2015-2020 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/debug.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/debug.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/dirbuf.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/dirbuf.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/eventlog.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/eventlog.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fs.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fs.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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)
+        MountPoint = L"*:";
+
+    Size = (lstrlenW(MountPoint) + 1) * sizeof(WCHAR);
+    Desc.MountPoint = MemAlloc(Size);
+    if (0 == Desc.MountPoint)
     {
-        DWORD Drives;
+        Result = STATUS_INSUFFICIENT_RESOURCES;
-        WCHAR Drive;
+        goto exit;
-
-        MountPoint = MemAlloc(3 * sizeof(WCHAR));
-        if (0 == MountPoint)
-            return STATUS_INSUFFICIENT_RESOURCES;
-        MountPoint[1] = L':';
-        MountPoint[2] = L'\0';
-
-        Drives = GetLogicalDrives();
-        if (0 != Drives)
-        {
-            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))
-                        goto exit;
-                }
-            Result = STATUS_NO_SUCH_DEVICE;
-        }
-        else
-            Result = FspNtStatusFromWin32(GetLastError());
     }
-    else
+    memcpy(Desc.MountPoint, MountPoint, Size);
-    {
-        PWSTR P;
-        ULONG L;
 
-        L = (ULONG)((lstrlenW(MountPoint) + 1) * sizeof(WCHAR));
+    Result = FspMountSet(&Desc);
-
-        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);
-    }
 
 exit:
     if (NT_SUCCESS(Result))
     {
-        FileSystem->MountPoint = MountPoint;
+        FileSystem->MountPoint = Desc.MountPoint;
-        FileSystem->MountHandle = MountHandle;
+        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))
+    FSP_MOUNT_DESC Desc;
-        FspFileSystemRemoveMountPoint_Drive(FileSystem->MountPoint, FileSystem->VolumeName,
+
-            FileSystem->MountHandle);
+    memset(&Desc, 0, sizeof Desc);
-    else
+    Desc.VolumeHandle = FileSystem->VolumeHandle;
-        FspFileSystemRemoveMountPoint_Directory(FileSystem->MountHandle);
+    Desc.VolumeName = FileSystem->VolumeName;
+    Desc.MountPoint = FileSystem->MountPoint;
+    Desc.MountHandle = FileSystem->MountHandle;
+
+    FspMountRemove(&Desc);
 
     MemFree(FileSystem->MountPoint);
     FileSystem->MountPoint = 0;
@@ -542,6 +273,11 @@ static DWORD WINAPI FspFileSystemDispatcherThread(PVOID FileSystem0)
     OperationContext.Response = Response;
     TlsSetValue(FspFileSystemTlsKey, &OperationContext);
 
+    Result = FspFsctlTransact(FileSystem->VolumeHandle, 0, 0, 0, 0, FALSE);
+        /* send a Transact0 to inform the FSD that the dispatcher is ready */
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
     memset(Response, 0, sizeof *Response);
     for (;;)
     {
@@ -636,6 +372,11 @@ 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

@@ -1,7 +1,7 @@
 /**
  * @file dll/fsctl.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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

@@ -1,7 +1,7 @@
 /**
  * @file dll/fsop.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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,
@@ -757,7 +760,7 @@ static NTSTATUS FspFileSystemOpCreate_FileOpenTargetDirectory(FSP_FILE_SYSTEM *F
     NTSTATUS Result;
     WCHAR Root[2] = L"\\";
     PWSTR Parent, Suffix;
-    UINT32 GrantedAccess;
+    UINT32 CreateOptions, GrantedAccess;
     FSP_FSCTL_TRANSACT_FULL_CONTEXT FullContext;
     FSP_FSCTL_OPEN_FILE_INFO OpenFileInfo;
     UINT32 Information;
@@ -772,8 +775,10 @@ static NTSTATUS FspFileSystemOpCreate_FileOpenTargetDirectory(FSP_FILE_SYSTEM *F
     OpenFileInfo.NormalizedName = (PVOID)Response->Buffer;
     OpenFileInfo.NormalizedNameSize = FSP_FSCTL_TRANSACT_RSP_BUFFER_SIZEMAX;
     FspPathSuffix((PWSTR)Request->Buffer, &Parent, &Suffix, Root);
+    CreateOptions =
+        (Request->Req.Create.CreateOptions | FILE_DIRECTORY_FILE) & ~FILE_NON_DIRECTORY_FILE;
     Result = FileSystem->Interface->Open(FileSystem,
-        Parent, Request->Req.Create.CreateOptions, GrantedAccess,
+        Parent, CreateOptions, GrantedAccess,
         AddrOfFileContext(FullContext), &OpenFileInfo.FileInfo);
     FspPathCombine((PWSTR)Request->Buffer, Suffix);
     if (!NT_SUCCESS(Result))
@@ -1743,9 +1748,15 @@ reparse_data_exit:
         return IO_REPARSE_TAG_SYMLINK != ReparseData->ReparseTag ?
             STATUS_IO_REPARSE_DATA_INVALID : STATUS_REPARSE_POINT_NOT_RESOLVED;
 
+    if (IO_REPARSE_TAG_MOUNT_POINT == ReparseData->ReparseTag)
+        RemainderPathSize = lstrlenW(RemainderPath) * sizeof(WCHAR);
+
     *PSize = ReparseDataSize;
     memcpy(Buffer, ReparseData, ReparseDataSize);
 
+    if (IO_REPARSE_TAG_MOUNT_POINT == ReparseData->ReparseTag)
+        OutputReparseData->Reserved = RemainderPathSize;
+
     PIoStatus->Status = STATUS_REPARSE;
     PIoStatus->Information = ReparseData->ReparseTag;
     return STATUS_REPARSE;

src/dll/fuse/fuse.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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_compat.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse_compat.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse/fuse_intf.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse_intf.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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;
@@ -757,12 +767,21 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
     int err;
     NTSTATUS Result;
 
-    if (0 != Ea)
+    if (0 != ExtraBuffer)
     {
-        if (0 == f->ops.listxattr || 0 == f->ops.getxattr ||
+        if (!ExtraBufferIsReparsePoint)
-            0 == f->ops.setxattr || 0 == f->ops.removexattr)
         {
-            Result = STATUS_EAS_NOT_SUPPORTED;
+            if (0 == f->ops.listxattr || 0 == f->ops.getxattr ||
+                0 == f->ops.setxattr || 0 == f->ops.removexattr)
+            {
+                Result = STATUS_EAS_NOT_SUPPORTED;
+                goto exit;
+            }
+        }
+        else
+        {
+            /* !!!: revisit */
+            Result = STATUS_INVALID_PARAMETER;
             goto exit;
         }
     }
@@ -785,8 +804,22 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
             goto exit;
     }
     Mode &= ~context->umask;
-    if (f->set_create_umask)
+    if (CreateOptions & FILE_DIRECTORY_FILE)
-        Mode = 0777 & ~f->create_umask;
+    {
+        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 */
@@ -866,12 +899,21 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
             goto exit;
     }
 
-    if (0 != Ea)
+    if (0 != ExtraBuffer)
     {
-        Result = FspFileSystemEnumerateEa(FileSystem,
+        if (!ExtraBufferIsReparsePoint)
-            fsp_fuse_intf_SetEaEntry, contexthdr->PosixPath, Ea, EaLength);
+        {
-        if (!NT_SUCCESS(Result))
+            Result = FspFileSystemEnumerateEa(FileSystem,
+                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.
@@ -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 +1026,18 @@ 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.
+         */
+        if (GrantedAccess & FILE_APPEND_DATA)
+        {
+            if (fi.flags == 0)
+                fi.flags = 1; /* need O_WRONLY as a bare minimum in order to append */
+        }
+
         if (0 != f->ops.open)
         {
             err = f->ops.open(contexthdr->PosixPath, &fi);
@@ -1096,7 +1151,8 @@ 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 +1283,8 @@ 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 +1364,8 @@ 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 +1388,8 @@ 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 +1427,8 @@ 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 +1475,8 @@ 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 +1503,8 @@ 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 +1651,8 @@ 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 +1676,9 @@ 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,
+    Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, filedesc->PosixPath,
-        &FileInfo);
+        FUSE_FILE_INFO(filedesc->IsDirectory, &fi),
+        &Uid, &Gid, &Mode, &FileInfo);
     if (!NT_SUCCESS(Result))
         goto exit;
 
@@ -1712,7 +1776,7 @@ 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 +2036,9 @@ 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 +2109,8 @@ 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 +2383,8 @@ 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_loop.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse_loop.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse/fuse_main.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse_main.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse/fuse_opt.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse_opt.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/library.h
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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/fuse3/fuse2to3.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse3/fuse2to3.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse3/fuse3.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse3/fuse3.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse3/fuse3_compat.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse/fuse3_compat.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/fuse3/library.h

@@ -1,7 +1,7 @@
 /**
  * @file dll/fuse3/library.h
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/launch.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/launch.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/library.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/library.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/library.h

@@ -1,7 +1,7 @@
 /**
  * @file dll/library.h
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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 2015-2020 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/dll/np.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/np.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/ntstatus.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/ntstatus.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/path.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/path.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/security.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/security.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/service.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/service.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/util.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/util.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dll/wksid.c

@@ -1,7 +1,7 @@
 /**
  * @file dll/wksid.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dotnet/FileSystemBase+Const.cs

@@ -1,7 +1,7 @@
 /*
  * dotnet/FileSystemBase+Const.cs
  *
- * Copyright 2015-2019 Bill Zissimopoulos
+ * Copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/dotnet/FileSystemBase.cs

@@ -1,7 +1,7 @@
 /*
  * dotnet/FileSystemBase.cs
  *
- * Copyright 2015-2019 Bill Zissimopoulos
+ * Copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -1085,8 +1085,9 @@ namespace Fsp
             UInt32 FileAttributes,
             Byte[] SecurityDescriptor,
             UInt64 AllocationSize,
-            IntPtr Ea,
+            IntPtr ExtraBuffer,
-            UInt32 EaLength,
+            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

@@ -1,7 +1,7 @@
 /*
  * dotnet/FileSystemHost.cs
  *
- * Copyright 2015-2019 Bill Zissimopoulos
+ * Copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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,
+            IntPtr ExtraBuffer,
-            UInt32 EaLength,
+            UInt32 ExtraLength,
+            Boolean ExtraBufferIsReparsePoint,
             ref FullContext FullContext,
             ref OpenFileInfo OpenFileInfo)
         {
@@ -490,8 +687,9 @@ namespace Fsp
                     FileAttributes,
                     Api.MakeSecurityDescriptor(SecurityDescriptor),
                     AllocationSize,
-                    Ea,
+                    ExtraBuffer,
-                    EaLength,
+                    ExtraLength,
+                    ExtraBufferIsReparsePoint,
                     out FileNode,
                     out FileDesc,
                     out OpenFileInfo.FileInfo,

src/dotnet/Interop.cs

@@ -1,7 +1,7 @@
 /*
  * dotnet/Interop.cs
  *
- * Copyright 2015-2019 Bill Zissimopoulos
+ * Copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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,
+                IntPtr ExtraBuffer,
-                UInt32 EaLength,
+                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/dotnet/Service.cs

@@ -1,7 +1,7 @@
 /*
  * dotnet/Service.cs
  *
- * Copyright 2015-2019 Bill Zissimopoulos
+ * Copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/fsptool/fsptool.c

@@ -1,7 +1,7 @@
 /**
  * @file fsptool/fsptool.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/ku/library.h

@@ -0,0 +1,227 @@
+/**
+ * @file ku/library.h
+ *
+ * @copyright 2015-2020 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 PGENERIC_MAPPING FspGetFileGenericMapping(VOID)
+{
+    return IoGetFileObjectGenericMapping();
+}
+
+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
@@ -14,7 +14,7 @@
  * [SNAME]
  *     https://www.cygwin.com/cygwin-ug-net/using-specialnames.html
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -32,15 +32,67 @@
  * associated repository.
  */
 
-#include <dll/library.h>
+#include <ku/library.h>
-#include <aclapi.h>
-#define _NTDEF_
-#include <ntsecapi.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;
+#if defined(_KERNEL_MODE)
-union
+#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))
@@ -599,6 +725,20 @@ lasterror:
     goto exit;
 }
 
+static inline ACCESS_MASK FspPosixCanonicalizeAccessMask(ACCESS_MASK AccessMask)
+{
+    PGENERIC_MAPPING Mapping = FspGetFileGenericMapping();
+    if (AccessMask & GENERIC_READ)
+        AccessMask |= Mapping->GenericRead;
+    if (AccessMask & GENERIC_WRITE)
+        AccessMask |= Mapping->GenericWrite;
+    if (AccessMask & GENERIC_EXECUTE)
+        AccessMask |= Mapping->GenericExecute;
+    if (AccessMask & GENERIC_ALL)
+        AccessMask |= Mapping->GenericAll;
+    return AccessMask & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
+}
+
 static inline UINT32 FspPosixMapAccessMaskToPermission(ACCESS_MASK AccessMask)
 {
     /* [PERMS]
@@ -621,7 +761,17 @@ 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;
+
+    BOOLEAN OwnerOptional = (UINT_PTR)PUid & 1;
+    PUid = (PVOID)((UINT_PTR)PUid & ~1);
+    UINT32 OrigUid = *PUid;
+
+    BOOLEAN GroupOptional = (UINT_PTR)PGid & 1;
+    PGid = (PVOID)((UINT_PTR)PGid & ~1);
+    UINT32 OrigGid = *PGid;
+
+    PSID OwnerSid = 0, GroupSid = 0;
     BOOL Defaulted, DaclPresent;
     PACL Acl = 0;
     ACL_SIZE_INFORMATION AclSizeInfo;
@@ -629,6 +779,7 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
     PSID AceSid;
     DWORD AceAccessMask;
     DWORD OwnerAllow, OwnerDeny, GroupAllow, GroupDeny, WorldAllow, WorldDeny;
+    UINT32 AceUid = 0;
     UINT32 Uid, Gid, Mode;
     NTSTATUS Result;
 
@@ -643,30 +794,26 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
     if (!GetSecurityDescriptorDacl(SecurityDescriptor, &DaclPresent, &Acl, &Defaulted))
         goto lasterror;
 
-    Result = FspPosixMapSidToUid(OwnerSid, &Uid);
+    if (0 == OwnerSid && OwnerOptional)
-    if (!NT_SUCCESS(Result))
+        Uid = OrigUid;
-        goto exit;
+    else
+    {
+        Result = FspPosixMapSidToUid(OwnerSid, &Uid);
+        if (!NT_SUCCESS(Result))
+            goto exit;
+    }
 
-    Result = FspPosixMapSidToUid(GroupSid, &Gid);
+    if (0 == GroupSid && GroupOptional)
-    if (!NT_SUCCESS(Result))
+        Gid = OrigGid;
-        goto exit;
+    else
+    {
+        Result = FspPosixMapSidToUid(GroupSid, &Gid);
+        if (!NT_SUCCESS(Result))
+            goto exit;
+    }
 
     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))
@@ -696,12 +843,14 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
             else
                 continue;
 
+            AceAccessMask = FspPosixCanonicalizeAccessMask(AceAccessMask);
+
             /* [PERMS]
              * If the ACE contains the Authenticated Users SID or the World SID then
              * 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
@@ -726,6 +875,9 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
             }
             else
             {
+                if (0 == OwnerSid || 0 == GroupSid)
+                    FspPosixMapSidToUid(AceSid, &AceUid);
+
                 /* [PERMS]
                  * Note that if the file owner and file group SIDs are the same,
                  * then the access rights are saved in both the "owner" and "group"
@@ -737,7 +889,7 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
                  * in the "group" collection as appropriate in the corresponding set of
                  * granted or denied rights (as described above).
                  */
-                if (EqualSid(GroupSid, AceSid))
+                if (0 != GroupSid ? EqualSid(GroupSid, AceSid) : (Gid == AceUid))
                 {
                     if (ACCESS_ALLOWED_ACE_TYPE == Ace->AceType)
                         GroupAllow |= AceAccessMask & ~GroupDeny;
@@ -750,7 +902,7 @@ FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
                  * in the "owner" collection as appropriate in the corresponding set of
                  * granted or denied rights (as described above).
                  */
-                if (EqualSid(OwnerSid, AceSid))
+                if (0 != OwnerSid ? EqualSid(OwnerSid, AceSid) : (Uid == AceUid))
                 {
                     if (ACCESS_ALLOWED_ACE_TYPE == Ace->AceType)
                         OwnerAllow |= AceAccessMask & ~OwnerDeny;
@@ -812,6 +964,8 @@ 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 +1028,8 @@ 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 +1081,15 @@ 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 +1104,8 @@ 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 2015-2020 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/launchctl.c

@@ -1,7 +1,7 @@
 /**
  * @file launcher/launchctl.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/launcher/launcher.c

@@ -1,7 +1,7 @@
 /**
  * @file launcher/launcher.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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 */
+    return 2 + (ULONG)(UINT_PTR)PathTransform(0, Arg, Pattern);
-    for (PWSTR P = Arg; *P; P++)
-        if (L'"' != *P)
-            Length++;
-
-    return Length;
 }
 
-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++)
+    Dest = PathTransform(Dest, Arg, Pattern);
-        if (L'"' != *P)
-            *Dest++ = *P;
     *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 2015-2020 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

@@ -1,7 +1,7 @@
 /**
  * @file shared/minimal.h
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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/callbacks.c

@@ -2,7 +2,7 @@
  * @file sys/callbacks.c
  * Fast I/O and resource acquisition callbacks.
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -308,7 +308,7 @@ VOID FspPropagateTopFlags(PIRP Irp, PIRP TopLevelIrp)
         {
             DEBUGBREAK_EX(iorecu);
 
-            FspIrpSetTopFlags(Irp, FspIrpFlags(TopLevelIrp));
+            FspIrpSetTopFlags(Irp, FspIrpTopFlags(TopLevelIrp) | FspIrpFlags(TopLevelIrp));
         }
     }
 }

src/sys/cleanup.c

@@ -1,7 +1,7 @@
 /**
  * @file sys/cleanup.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/sys/close.c

@@ -1,7 +1,7 @@
 /**
  * @file sys/close.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.

src/sys/create.c

@@ -1,7 +1,7 @@
 /**
  * @file sys/create.c
  *
- * @copyright 2015-2019 Bill Zissimopoulos
+ * @copyright 2015-2020 Bill Zissimopoulos
  */
 /*
  * This file is part of WinFsp.
@@ -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();
 
@@ -266,6 +284,11 @@ static NTSTATUS FspFsvolCreateNoLock(
         return STATUS_SUCCESS;
     }
 
+#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
+    if (!FspFsvolDeviceReadyToAcceptIrp(FsvolDeviceObject))
+        return STATUS_CANCELLED;
+#endif
+
     PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
     ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
     ULONG CreateOptions = IrpSp->Parameters.Create.Options;
@@ -279,6 +302,8 @@ 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 +317,7 @@ 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 +328,36 @@ 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 +374,9 @@ 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 +614,9 @@ static NTSTATUS FspFsvolCreateNoLock(
         SecurityDescriptorSize = 0;
         FileAttributes = 0;
 
-        /* cannot set EA on named stream */
+        /* cannot set extra buffer on named stream */
-        EaBuffer = 0;
+        ExtraBuffer = 0;
-        EaLength = 0;
+        ExtraLength = 0;
 
         /* remember the main file node */
         ASSERT(0 == FileNode->MainFileNode);
@@ -577,8 +636,8 @@ static NTSTATUS FspFsvolCreateNoLock(
 
     /* create the user-mode file system request */
     Result = FspIopCreateRequestEx(Irp, &FileNode->FileName,
-        0 != EaBuffer ?
+        0 != ExtraBuffer ?
-            FSP_FSCTL_DEFAULT_ALIGN_UP(SecurityDescriptorSize) + EaLength : SecurityDescriptorSize,
+            FSP_FSCTL_DEFAULT_ALIGN_UP(SecurityDescriptorSize) + ExtraLength : SecurityDescriptorSize,
         FspFsvolCreateRequestFini, &Request);
     if (!NT_SUCCESS(Result))
     {
@@ -616,10 +675,10 @@ 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 +687,10 @@ 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 +701,10 @@ static NTSTATUS FspFsvolCreateNoLock(
         RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset,
             SecurityDescriptor, SecurityDescriptorSize);
 
-    /* copy the EA buffer (if any) into the request */
+    /* copy the extra buffer (if any) into the request */
-    if (0 != EaBuffer)
+    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)