Merge branch 'pvt-fuse3'

2025-10-30 19:48:38 -05:00 · 2018-07-25 12:54:54 -07:00
parent 77fb2cc1c1 cf699ba441
commit 523ccbea02
25 changed files with 3102 additions and 68 deletions
--- a/Changelog.asciidoc
+++ b/Changelog.asciidoc
@@ -5,9 +5,11 @@ v1.4B2 (2018.2 B2)::

 Changes since v1.3:

-* New `Control` file system operation allows sending custom control codes to the file system using the Windows `DeviceIoControl` API.
+* FUSE3 API (version 3.2) is now available. The FUSE2 API (version 2.8) also remains supported.
+* New `Control` file system operation allows sending custom control codes to the file system using the Windows `DeviceIoControl` API. FUSE `ioctl` is also supported.
 * `FlushAndPurgeOnCleanup` has now been added to the .NET API. (GitHub PR #176; thanks @FrKaram.)
-* New sample file system "airfs" contributed by @JohnOberschelp.
+* New sample file system "airfs" contributed by @JohnOberschelp. Airfs is an in-memory file system like Memfs on which it is based on; it has received substantial improvements in how the file name space is maintained and has been modified to use modern C++ techniques by John.
+* New sample file system "passthrough-fuse3" passes all operations to an underlying file system. This file system is built using the FUSE3 API. It builds and runs on both Windows and Cygwin.


 v1.4B1 (2018.2 B1)::
--- a/build/VStudio/installer/Product.wxs
+++ b/build/VStudio/installer/Product.wxs
@@ -281,6 +281,20 @@
                    <File Name="winfsp_fuse.h" KeyPath="yes" />
                </Component>
            </Directory>
+            <Directory Id="INCDIR.fuse3" Name="fuse3">
+                <Component Id="C.fuse3.h">
+                    <File Id="fuse3.h" Name="fuse.h" KeyPath="yes" />
+                </Component>
+                <Component Id="C.fuse3_common.h">
+                    <File Id="fuse3_common.h" Name="fuse_common.h" KeyPath="yes" />
+                </Component>
+                <Component Id="C.fuse3_opt.h">
+                    <File Id="fuse3_opt.h" Name="fuse_opt.h" KeyPath="yes" />
+                </Component>
+                <Component Id="C.winfsp_fuse3.h">
+                    <File Id="winfsp_fuse3.h" Name="winfsp_fuse.h" KeyPath="yes" />
+                </Component>
+            </Directory>
        </DirectoryRef>
        <DirectoryRef Id="LIBDIR" FileSource="..\build\$(var.Configuration)">
            <Component Id="C.winfsp_x64.lib">
@@ -309,6 +323,26 @@
                    KeyPath="yes" />
                <Condition>NOT VersionNT64</Condition>
            </Component>
+
+            <!-- On Win64 copy fuse3-x64.pc -->
+            <Component Id="C.fuse3_x64.pc" Guid="FE59E3BA-E5EA-4822-80B1-19A1DE6B62C7">
+                <File
+                    Id="FILE.fuse3_x64.pc"
+                    Name="fuse3.pc"
+                    Source="..\build\$(var.Configuration)\fuse3-x64.pc"
+                    KeyPath="yes" />
+                <Condition>VersionNT64</Condition>
+            </Component>
+
+            <!-- On Win32 copy fuse3-x86.pc -->
+            <Component Id="C.fuse3_x86.pc" Guid="176205D0-07EA-4DFC-947F-18E89ABDAFAB">
+                <File
+                    Id="FILE.fuse3_x86.pc"
+                    Name="fuse3.pc"
+                    Source="..\build\$(var.Configuration)\fuse3-x86.pc"
+                    KeyPath="yes" />
+                <Condition>NOT VersionNT64</Condition>
+            </Component>
        </DirectoryRef>
        <DirectoryRef Id="OPTDIR">
            <Directory Id="OPTDIR.cygfuse" Name="cygfuse" FileSource="..\..\..\opt\cygfuse\dist">
@@ -415,6 +449,32 @@
                    <File Name="README.md" KeyPath="yes" />
                </Component>
            </Directory>
+            <Directory Id="SMPDIR.passthrough_fuse3" Name="passthrough-fuse3">
+                <Component Id="C.passthrough_fuse3.c">
+                    <File Name="passthrough-fuse3.c" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.winposix.c">
+                    <File Id="F.passthrough_fuse3.winposix.c" Name="winposix.c" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.winposix.h">
+                    <File Id="F.passthrough_fuse3.winposix.h" Name="winposix.h" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.sln">
+                    <File Name="passthrough-fuse3.sln" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.vcxproj">
+                    <File Name="passthrough-fuse3.vcxproj" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.vcxproj.filters">
+                    <File Name="passthrough-fuse3.vcxproj.filters" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.Makefile">
+                    <File Id="F.passthrough_fuse3.Makefile" Name="Makefile" KeyPath="yes" />
+                </Component>
+                <Component Id="C.passthrough_fuse3.README.md">
+                    <File Id="F.passthrough_fuse3.README.md" Name="README.md" KeyPath="yes" />
+                </Component>
+            </Directory>
            <Directory Id="SMPDIR.passthrough_dotnet" Name="passthrough-dotnet">
                <Component Id="C.passthrough_dotnet.Program.cs">
                    <File Id="FILE.passthrough_dotnet.Program.cs" Name="Program.cs" KeyPath="yes" />
@@ -493,12 +553,18 @@
            <ComponentRef Id="C.fuse_common.h" />
            <ComponentRef Id="C.fuse_opt.h" />
            <ComponentRef Id="C.winfsp_fuse.h" />
+            <ComponentRef Id="C.fuse3.h" />
+            <ComponentRef Id="C.fuse3_common.h" />
+            <ComponentRef Id="C.fuse3_opt.h" />
+            <ComponentRef Id="C.winfsp_fuse3.h" />
        </ComponentGroup>
        <ComponentGroup Id="C.WinFsp.lib">
            <ComponentRef Id="C.winfsp_x64.lib" />
            <ComponentRef Id="C.winfsp_x86.lib" />
            <ComponentRef Id="C.fuse_x64.pc" />
            <ComponentRef Id="C.fuse_x86.pc" />
+            <ComponentRef Id="C.fuse3_x64.pc" />
+            <ComponentRef Id="C.fuse3_x86.pc" />
        </ComponentGroup>
        <ComponentGroup Id="C.WinFsp.opt.fuse">
            <ComponentRef Id="C.fuse.tar.xz.x64" />
@@ -532,6 +598,14 @@
            <ComponentRef Id="C.passthrough_fuse.vcxproj.filters" />
            <ComponentRef Id="C.passthrough_fuse.Makefile" />
            <ComponentRef Id="C.passthrough_fuse.README.md" />
+            <ComponentRef Id="C.passthrough_fuse3.c" />
+            <ComponentRef Id="C.passthrough_fuse3.winposix.c" />
+            <ComponentRef Id="C.passthrough_fuse3.winposix.h" />
+            <ComponentRef Id="C.passthrough_fuse3.sln" />
+            <ComponentRef Id="C.passthrough_fuse3.vcxproj" />
+            <ComponentRef Id="C.passthrough_fuse3.vcxproj.filters" />
+            <ComponentRef Id="C.passthrough_fuse3.Makefile" />
+            <ComponentRef Id="C.passthrough_fuse3.README.md" />
        </ComponentGroup>
        <ComponentGroup Id="C.WinFsp.sym">
            <ComponentRef Id="C.winfsp_x64.sys.pdb" />
--- a/build/VStudio/winfsp_dll.vcxproj
+++ b/build/VStudio/winfsp_dll.vcxproj
@@ -20,6 +20,10 @@
    </ProjectConfiguration>
  </ItemGroup>
  <ItemGroup>
+    <ClInclude Include="..\..\inc\fuse3\fuse.h" />
+    <ClInclude Include="..\..\inc\fuse3\fuse_common.h" />
+    <ClInclude Include="..\..\inc\fuse3\fuse_opt.h" />
+    <ClInclude Include="..\..\inc\fuse3\winfsp_fuse.h" />
    <ClInclude Include="..\..\inc\fuse\fuse.h" />
    <ClInclude Include="..\..\inc\fuse\fuse_common.h" />
    <ClInclude Include="..\..\inc\fuse\fuse_opt.h" />
@@ -28,6 +32,7 @@
    <ClInclude Include="..\..\inc\winfsp\launch.h" />
    <ClInclude Include="..\..\inc\winfsp\winfsp.h" />
    <ClInclude Include="..\..\inc\winfsp\winfsp.hpp" />
+    <ClInclude Include="..\..\src\dll\fuse3\library.h" />
    <ClInclude Include="..\..\src\dll\fuse\library.h" />
    <ClInclude Include="..\..\src\dll\library.h" />
    <ClInclude Include="..\..\src\shared\minimal.h" />
@@ -35,6 +40,8 @@
  <ItemGroup>
    <ClCompile Include="..\..\src\dll\dirbuf.c" />
    <ClCompile Include="..\..\src\dll\eventlog.c" />
+    <ClCompile Include="..\..\src\dll\fuse3\fuse2to3.c" />
+    <ClCompile Include="..\..\src\dll\fuse3\fuse3.c" />
    <ClCompile Include="..\..\src\dll\fuse\fuse.c" />
    <ClCompile Include="..\..\src\dll\fuse\fuse_compat.c" />
    <ClCompile Include="..\..\src\dll\fuse\fuse_intf.c" />
@@ -79,6 +86,29 @@ copy /b $(OutDir)fuse-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse-$(Platfor
      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(OutDir)fuse-$(PlatformTarget).pc</Outputs>
      <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkObjects>
    </CustomBuild>
+    <CustomBuild Include="..\..\src\dll\fuse3\fuse3.pc.in">
+      <FileType>Document</FileType>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">echo arch=$(PlatformTarget) &gt;$(OutDir)fuse3-$(PlatformTarget).pc
+copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(PlatformTarget).pc &gt;nul</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">echo arch=$(PlatformTarget) &gt;$(OutDir)fuse3-$(PlatformTarget).pc
+copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(PlatformTarget).pc &gt;nul</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">echo arch=$(PlatformTarget) &gt;$(OutDir)fuse3-$(PlatformTarget).pc
+copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(PlatformTarget).pc &gt;nul</Command>
+      <Command Condition="'$(Configuration)|$(Platform)'=='Release|x64'">echo arch=$(PlatformTarget) &gt;$(OutDir)fuse3-$(PlatformTarget).pc
+copy /b $(OutDir)fuse3-$(PlatformTarget).pc + %(FullPath) $(OutDir)fuse3-$(PlatformTarget).pc &gt;nul</Command>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Writing fuse3-$(PlatformTarget).pc</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Writing fuse3-$(PlatformTarget).pc</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Writing fuse3-$(PlatformTarget).pc</Message>
+      <Message Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Writing fuse3-$(PlatformTarget).pc</Message>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(OutDir)fuse3-$(PlatformTarget).pc</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(OutDir)fuse3-$(PlatformTarget).pc</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(OutDir)fuse3-$(PlatformTarget).pc</Outputs>
+      <Outputs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(OutDir)fuse3-$(PlatformTarget).pc</Outputs>
+      <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</LinkObjects>
+      <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkObjects>
+      <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</LinkObjects>
+      <LinkObjects Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkObjects>
+    </CustomBuild>
    <None Include="..\..\src\dll\library.def" />
  </ItemGroup>
  <ItemGroup>
--- a/build/VStudio/winfsp_dll.vcxproj.filters
+++ b/build/VStudio/winfsp_dll.vcxproj.filters
@@ -21,6 +21,12 @@
    <Filter Include="Source\fuse">
      <UniqueIdentifier>{518cce17-85cd-489c-b4be-920a84c1d73c}</UniqueIdentifier>
    </Filter>
+    <Filter Include="Include\fuse3">
+      <UniqueIdentifier>{12afd2f1-f5ec-4008-b6ef-89cc626019ea}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Source\fuse3">
+      <UniqueIdentifier>{96091a7b-3923-4a74-9491-3ee230c688f9}</UniqueIdentifier>
+    </Filter>
  </ItemGroup>
  <ItemGroup>
    <ClInclude Include="..\..\inc\winfsp\fsctl.h">
@@ -56,6 +62,21 @@
    <ClInclude Include="..\..\inc\winfsp\launch.h">
      <Filter>Include\winfsp</Filter>
    </ClInclude>
+    <ClInclude Include="..\..\inc\fuse3\fuse.h">
+      <Filter>Include\fuse3</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\inc\fuse3\fuse_common.h">
+      <Filter>Include\fuse3</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\inc\fuse3\fuse_opt.h">
+      <Filter>Include\fuse3</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\inc\fuse3\winfsp_fuse.h">
+      <Filter>Include\fuse3</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\dll\fuse3\library.h">
+      <Filter>Source\fuse3</Filter>
+    </ClInclude>
  </ItemGroup>
  <ItemGroup>
    <ClCompile Include="..\..\src\dll\library.c">
@@ -121,6 +142,12 @@
    <ClCompile Include="..\..\src\dll\launch.c">
      <Filter>Source</Filter>
    </ClCompile>
+    <ClCompile Include="..\..\src\dll\fuse3\fuse3.c">
+      <Filter>Source\fuse3</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\dll\fuse3\fuse2to3.c">
+      <Filter>Source\fuse3</Filter>
+    </ClCompile>
  </ItemGroup>
  <ItemGroup>
    <None Include="..\..\src\dll\library.def">
@@ -139,5 +166,8 @@
    <CustomBuild Include="..\..\src\dll\fuse\fuse.pc.in">
      <Filter>Source\fuse</Filter>
    </CustomBuild>
+    <CustomBuild Include="..\..\src\dll\fuse3\fuse3.pc.in">
+      <Filter>Source\fuse3</Filter>
+    </CustomBuild>
  </ItemGroup>
 </Project>
--- a/inc/fuse3/fuse.h
+++ b/inc/fuse3/fuse.h
@@ -0,0 +1,334 @@
+/**
+ * @file fuse3/fuse.h
+ * WinFsp FUSE3 compatible API.
+ *
+ * This file is derived from libfuse/include/fuse.h:
+ *     FUSE: Filesystem in Userspace
+ *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#ifndef FUSE_H_
+#define FUSE_H_
+
+#include "fuse_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct fuse3;
+
+enum fuse3_readdir_flags
+{
+    FUSE_READDIR_PLUS                   = (1 << 0),
+};
+
+enum fuse3_fill_dir_flags
+{
+    FUSE_FILL_DIR_PLUS                  = (1 << 1),
+};
+
+typedef int (*fuse3_fill_dir_t)(void *buf, const char *name,
+    const struct fuse_stat *stbuf, fuse_off_t off,
+    enum fuse3_fill_dir_flags flags);
+
+struct fuse3_config
+{
+    int set_gid;
+    unsigned int gid;
+    int set_uid;
+    unsigned int uid;
+    int set_mode;
+    unsigned int umask;
+    double entry_timeout;
+    double negative_timeout;
+    double attr_timeout;
+    int intr;
+    int intr_signal;
+    int remember;
+    int hard_remove;
+    int use_ino;
+    int readdir_ino;
+    int direct_io;
+    int kernel_cache;
+    int auto_cache;
+    int ac_attr_timeout_set;
+    double ac_attr_timeout;
+    int nullpath_ok;
+    /* private */
+    int show_help;
+    char *modules;
+    int debug;
+};
+
+struct fuse3_operations
+{
+    /* S - supported by WinFsp */
+    /* S */ int (*getattr)(const char *path, struct fuse_stat *stbuf,
+        struct fuse3_file_info *fi);
+    /* S */ int (*readlink)(const char *path, char *buf, size_t size);
+    /* S */ int (*mknod)(const char *path, fuse_mode_t mode, fuse_dev_t dev);
+    /* S */ int (*mkdir)(const char *path, fuse_mode_t mode);
+    /* S */ int (*unlink)(const char *path);
+    /* S */ int (*rmdir)(const char *path);
+    /* S */ int (*symlink)(const char *dstpath, const char *srcpath);
+    /* S */ int (*rename)(const char *oldpath, const char *newpath, unsigned int flags);
+    /* _ */ int (*link)(const char *srcpath, const char *dstpath);
+    /* S */ int (*chmod)(const char *path, fuse_mode_t mode,
+        struct fuse3_file_info *fi);
+    /* S */ int (*chown)(const char *path, fuse_uid_t uid, fuse_gid_t gid,
+        struct fuse3_file_info *fi);
+    /* S */ int (*truncate)(const char *path, fuse_off_t size,
+        struct fuse3_file_info *fi);
+    /* S */ int (*open)(const char *path, struct fuse3_file_info *fi);
+    /* S */ int (*read)(const char *path, char *buf, size_t size, fuse_off_t off,
+        struct fuse3_file_info *fi);
+    /* S */ int (*write)(const char *path, const char *buf, size_t size, fuse_off_t off,
+        struct fuse3_file_info *fi);
+    /* S */ int (*statfs)(const char *path, struct fuse_statvfs *stbuf);
+    /* S */ int (*flush)(const char *path, struct fuse3_file_info *fi);
+    /* S */ int (*release)(const char *path, struct fuse3_file_info *fi);
+    /* S */ int (*fsync)(const char *path, int datasync, struct fuse3_file_info *fi);
+    /* _ */ int (*setxattr)(const char *path, const char *name, const char *value, size_t size,
+        int flags);
+    /* _ */ int (*getxattr)(const char *path, const char *name, char *value, size_t size);
+    /* _ */ int (*listxattr)(const char *path, char *namebuf, size_t size);
+    /* _ */ int (*removexattr)(const char *path, const char *name);
+    /* S */ int (*opendir)(const char *path, struct fuse3_file_info *fi);
+    /* S */ int (*readdir)(const char *path, void *buf, fuse3_fill_dir_t filler, fuse_off_t off,
+        struct fuse3_file_info *fi, enum fuse3_readdir_flags);
+    /* S */ int (*releasedir)(const char *path, struct fuse3_file_info *fi);
+    /* S */ int (*fsyncdir)(const char *path, int datasync, struct fuse3_file_info *fi);
+    /* S */ void *(*init)(struct fuse3_conn_info *conn,
+        struct fuse3_config *conf);
+    /* S */ void (*destroy)(void *data);
+    /* _ */ int (*access)(const char *path, int mask);
+    /* S */ int (*create)(const char *path, fuse_mode_t mode, struct fuse3_file_info *fi);
+    /* _ */ int (*lock)(const char *path,
+        struct fuse3_file_info *fi, int cmd, struct fuse_flock *lock);
+    /* S */ int (*utimens)(const char *path, const struct fuse_timespec tv[2],
+        struct fuse3_file_info *fi);
+    /* _ */ int (*bmap)(const char *path, size_t blocksize, uint64_t *idx);
+    /* S */ int (*ioctl)(const char *path, int cmd, void *arg, struct fuse3_file_info *fi,
+        unsigned int flags, void *data);
+    /* _ */ int (*poll)(const char *path, struct fuse3_file_info *fi,
+        struct fuse3_pollhandle *ph, unsigned *reventsp);
+    /* _ */ int (*write_buf)(const char *path,
+        struct fuse3_bufvec *buf, fuse_off_t off, struct fuse3_file_info *fi);
+    /* _ */ int (*read_buf)(const char *path,
+        struct fuse3_bufvec **bufp, size_t size, fuse_off_t off, struct fuse3_file_info *fi);
+    /* _ */ int (*flock)(const char *path, struct fuse3_file_info *, int op);
+    /* _ */ int (*fallocate)(const char *path, int mode, fuse_off_t off, fuse_off_t len,
+        struct fuse3_file_info *fi);
+};
+
+struct fuse3_context
+{
+    struct fuse3 *fuse;
+    fuse_uid_t uid;
+    fuse_gid_t gid;
+    fuse_pid_t pid;
+    void *private_data;
+    fuse_mode_t umask;
+};
+
+#define fuse_main(argc, argv, ops, data)\
+    fuse3_main_real(argc, argv, ops, sizeof *(ops), data)
+
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_main_real)(struct fsp_fuse_env *env,
+    int argc, char *argv[],
+    const struct fuse3_operations *ops, size_t opsize, void *data);
+FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse3_lib_help)(struct fsp_fuse_env *env,
+    struct fuse_args *args);
+FSP_FUSE_API struct fuse3 *FSP_FUSE_API_NAME(fsp_fuse3_new_30)(struct fsp_fuse_env *env,
+    struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data);
+FSP_FUSE_API struct fuse3 *FSP_FUSE_API_NAME(fsp_fuse3_new)(struct fsp_fuse_env *env,
+    struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data);
+FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse3_destroy)(struct fsp_fuse_env *env,
+    struct fuse3 *f);
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_mount)(struct fsp_fuse_env *env,
+    struct fuse3 *f, const char *mountpoint);
+FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse3_unmount)(struct fsp_fuse_env *env,
+    struct fuse3 *f);
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_loop)(struct fsp_fuse_env *env,
+    struct fuse3 *f);
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_loop_mt_31)(struct fsp_fuse_env *env,
+    struct fuse3 *f, int clone_fd);
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_loop_mt)(struct fsp_fuse_env *env,
+    struct fuse3 *f, struct fuse3_loop_config *config);
+FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse3_exit)(struct fsp_fuse_env *env,
+    struct fuse3 *f);
+FSP_FUSE_API struct fuse3_context *FSP_FUSE_API_NAME(fsp_fuse3_get_context)(struct fsp_fuse_env *env);
+
+FSP_FUSE_SYM(
+int fuse3_main_real(int argc, char *argv[],
+    const struct fuse3_operations *ops, size_t opsize, void *data),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_main_real)
+        (fsp_fuse_env(), argc, argv, ops, opsize, data);
+})
+
+FSP_FUSE_SYM(
+void fuse3_lib_help(struct fuse_args *args),
+{
+    FSP_FUSE_API_CALL(fsp_fuse3_lib_help)
+        (fsp_fuse_env(), args);
+})
+
+#if FUSE_USE_VERSION == 30
+FSP_FUSE_SYM(
+struct fuse3 *fuse3_new_30(struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_new_30)
+        (fsp_fuse_env(), args, ops, opsize, data);
+})
+#define fuse_new(args, op, size, data)\
+    fuse3_new_30(args, op, size, data)
+
+#else
+FSP_FUSE_SYM(
+struct fuse3 *fuse3_new(struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_new)
+        (fsp_fuse_env(), args, ops, opsize, data);
+})
+#endif
+
+FSP_FUSE_SYM(
+void fuse3_destroy(struct fuse3 *f),
+{
+    FSP_FUSE_API_CALL(fsp_fuse3_destroy)
+        (fsp_fuse_env(), f);
+})
+
+FSP_FUSE_SYM(
+int fuse3_mount(struct fuse3 *f, const char *mountpoint),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_mount)
+        (fsp_fuse_env(), f, mountpoint);
+})
+
+FSP_FUSE_SYM(
+void fuse3_unmount(struct fuse3 *f),
+{
+    FSP_FUSE_API_CALL(fsp_fuse3_unmount)
+        (fsp_fuse_env(), f);
+})
+
+FSP_FUSE_SYM(
+int fuse3_loop(struct fuse3 *f),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_loop)
+        (fsp_fuse_env(), f);
+})
+
+#if FUSE_USE_VERSION < 32
+FSP_FUSE_SYM(
+int fuse3_loop_mt_31(struct fuse3 *f, int clone_fd),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_loop_mt_31)
+        (fsp_fuse_env(), f, clone_fd);
+})
+#define fuse_loop_mt(f, clone_fd)\
+    fuse3_loop_mt_31(f, clone_fd)
+
+#else
+FSP_FUSE_SYM(
+int fuse3_loop_mt(struct fuse3 *f, struct fuse3_loop_config *config),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_loop_mt)
+        (fsp_fuse_env(), f, config);
+})
+#endif
+
+FSP_FUSE_SYM(
+void fuse3_exit(struct fuse3 *f),
+{
+    FSP_FUSE_API_CALL(fsp_fuse3_exit)
+        (fsp_fuse_env(), f);
+})
+
+FSP_FUSE_SYM(
+struct fuse3_context *fuse3_get_context(void),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_get_context)
+        (fsp_fuse_env());
+})
+
+FSP_FUSE_SYM(
+int fuse3_getgroups(int size, fuse_gid_t list[]),
+{
+    (void)size;
+    (void)list;
+    return -ENOSYS;
+})
+
+FSP_FUSE_SYM(
+int fuse3_interrupted(void),
+{
+    return 0;
+})
+
+FSP_FUSE_SYM(
+int fuse3_invalidate_path(struct fuse3 *f, const char *path),
+{
+    (void)f;
+    (void)path;
+    return -ENOENT;
+})
+
+FSP_FUSE_SYM(
+int fuse3_notify_poll(struct fuse3_pollhandle *ph),
+{
+    (void)ph;
+    return 0;
+})
+
+FSP_FUSE_SYM(
+int fuse3_start_cleanup_thread(struct fuse3 *f),
+{
+    (void)f;
+    return 0;
+})
+
+FSP_FUSE_SYM(
+void fuse3_stop_cleanup_thread(struct fuse3 *f),
+{
+    (void)f;
+})
+
+FSP_FUSE_SYM(
+int fuse3_clean_cache(struct fuse3 *f),
+{
+    (void)f;
+    return 600;
+})
+
+FSP_FUSE_SYM(
+struct fuse3_session *fuse3_get_session(struct fuse3 *f),
+{
+    return (struct fuse3_session *)f;
+})
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- a/inc/fuse3/fuse_common.h
+++ b/inc/fuse3/fuse_common.h
@@ -0,0 +1,232 @@
+/**
+ * @file fuse3/fuse_common.h
+ * WinFsp FUSE3 compatible API.
+ *
+ * This file is derived from libfuse/include/fuse_common.h:
+ *     FUSE: Filesystem in Userspace
+ *     Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#ifndef FUSE_COMMON_H_
+#define FUSE_COMMON_H_
+
+#include "winfsp_fuse.h"
+#include "fuse_opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FUSE_MAJOR_VERSION              3
+#define FUSE_MINOR_VERSION              2
+#define FUSE_MAKE_VERSION(maj, min)     ((maj) * 10 + (min))
+#define FUSE_VERSION                    FUSE_MAKE_VERSION(FUSE_MAJOR_VERSION, FUSE_MINOR_VERSION)
+
+#define FUSE_CAP_ASYNC_READ             (1 << 0)
+#define FUSE_CAP_POSIX_LOCKS            (1 << 1)
+#define FUSE_CAP_ATOMIC_O_TRUNC         (1 << 3)
+#define FUSE_CAP_EXPORT_SUPPORT         (1 << 4)
+#define FUSE_CAP_DONT_MASK              (1 << 6)
+#define FUSE_CAP_SPLICE_WRITE           (1 << 7)
+#define FUSE_CAP_SPLICE_MOVE            (1 << 8)
+#define FUSE_CAP_SPLICE_READ            (1 << 9)
+#define FUSE_CAP_FLOCK_LOCKS            (1 << 10)
+#define FUSE_CAP_IOCTL_DIR              (1 << 11)
+#define FUSE_CAP_AUTO_INVAL_DATA        (1 << 12)
+#define FUSE_CAP_READDIRPLUS            (1 << 13)
+#define FUSE_CAP_READDIRPLUS_AUTO       (1 << 14)
+#define FUSE_CAP_ASYNC_DIO              (1 << 15)
+#define FUSE_CAP_WRITEBACK_CACHE        (1 << 16)
+#define FUSE_CAP_NO_OPEN_SUPPORT        (1 << 17)
+#define FUSE_CAP_PARALLEL_DIROPS        (1 << 18)
+#define FUSE_CAP_POSIX_ACL              (1 << 19)
+#define FUSE_CAP_HANDLE_KILLPRIV        (1 << 20)
+#define FUSE_CAP_ALLOCATE               (1 << 27)   /* reserved (OSXFUSE) */
+#define FUSE_CAP_EXCHANGE_DATA          (1 << 28)   /* reserved (OSXFUSE) */
+#define FUSE_CAP_CASE_INSENSITIVE       (1 << 29)   /* file system is case insensitive */
+#define FUSE_CAP_VOL_RENAME             (1 << 30)   /* reserved (OSXFUSE) */
+#define FUSE_CAP_XTIMES                 (1 << 31)   /* reserved (OSXFUSE) */
+
+#define FSP_FUSE_CAP_CASE_INSENSITIVE   FUSE_CAP_CASE_INSENSITIVE
+
+#define FUSE_IOCTL_COMPAT               (1 << 0)
+#define FUSE_IOCTL_UNRESTRICTED         (1 << 1)
+#define FUSE_IOCTL_RETRY                (1 << 2)
+#define FUSE_IOCTL_DIR                  (1 << 4)
+#define FUSE_IOCTL_MAX_IOV              256
+
+#define FUSE_BUFVEC_INIT(s)             \
+    ((struct fuse3_bufvec){ 1, 0, 0, { {s, (enum fuse3_buf_flags)0, 0, -1, 0} } })
+
+struct fuse3_file_info
+{
+    int flags;
+    unsigned int writepage:1;
+    unsigned int direct_io:1;
+    unsigned int keep_cache:1;
+    unsigned int flush:1;
+    unsigned int nonseekable:1;
+    unsigned int flock_release:1;
+    unsigned int padding:27;
+    uint64_t fh;
+    uint64_t lock_owner;
+    uint32_t poll_events;
+};
+
+struct fuse3_loop_config
+{
+    int clone_fd;
+    unsigned int max_idle_threads;
+};
+
+struct fuse3_conn_info
+{
+    unsigned proto_major;
+    unsigned proto_minor;
+    unsigned max_write;
+    unsigned max_read;
+    unsigned max_readahead;
+    unsigned capable;
+    unsigned want;
+    unsigned max_background;
+    unsigned congestion_threshold;
+    unsigned time_gran;
+    unsigned reserved[22];
+};
+
+enum fuse3_buf_flags
+{
+    FUSE_BUF_IS_FD                      = (1 << 1),
+    FUSE_BUF_FD_SEEK                    = (1 << 2),
+    FUSE_BUF_FD_RETRY                   = (1 << 3),
+};
+
+enum fuse3_buf_copy_flags
+{
+    FUSE_BUF_NO_SPLICE                  = (1 << 1),
+    FUSE_BUF_FORCE_SPLICE               = (1 << 2),
+    FUSE_BUF_SPLICE_MOVE                = (1 << 3),
+    FUSE_BUF_SPLICE_NONBLOCK            = (1 << 4),
+};
+
+struct fuse3_buf
+{
+    size_t size;
+    enum fuse3_buf_flags flags;
+    void *mem;
+    int fd;
+    fuse_off_t pos;
+};
+
+struct fuse3_bufvec
+{
+    size_t count;
+    size_t idx;
+    size_t off;
+    struct fuse3_buf buf[1];
+};
+
+struct fuse3_session;
+struct fuse3_pollhandle;
+struct fuse3_conn_info_opts;
+
+FSP_FUSE_API struct fuse3_conn_info_opts *FSP_FUSE_API_NAME(fsp_fuse3_parse_conn_info_opts)(
+    struct fsp_fuse_env *env,
+    struct fuse_args *args);
+FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse3_apply_conn_info_opts)(struct fsp_fuse_env *env,
+    struct fuse3_conn_info_opts *opts, struct fuse3_conn_info *conn);
+FSP_FUSE_API int FSP_FUSE_API_NAME(fsp_fuse3_version)(struct fsp_fuse_env *env);
+FSP_FUSE_API const char *FSP_FUSE_API_NAME(fsp_fuse3_pkgversion)(struct fsp_fuse_env *env);
+FSP_FUSE_API int32_t FSP_FUSE_API_NAME(fsp_fuse_ntstatus_from_errno)(struct fsp_fuse_env *env,
+    int err);
+
+FSP_FUSE_SYM(
+struct fuse3_conn_info_opts* fuse3_parse_conn_info_opts(
+    struct fuse_args *args),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_parse_conn_info_opts)
+        (fsp_fuse_env(), args);
+})
+
+FSP_FUSE_SYM(
+void fuse3_apply_conn_info_opts(
+    struct fuse3_conn_info_opts *opts, struct fuse3_conn_info *conn),
+{
+    FSP_FUSE_API_CALL(fsp_fuse3_apply_conn_info_opts)
+        (fsp_fuse_env(), opts, conn);
+})
+
+FSP_FUSE_SYM(
+int fuse3_version(void),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_version)
+        (fsp_fuse_env());
+})
+
+FSP_FUSE_SYM(
+const char *fuse3_pkgversion(void),
+{
+    return FSP_FUSE_API_CALL(fsp_fuse3_pkgversion)
+        (fsp_fuse_env());
+})
+
+FSP_FUSE_SYM(
+void fuse3_pollhandle_destroy(struct fuse3_pollhandle *ph),
+{
+    (void)ph;
+})
+
+FSP_FUSE_SYM(
+size_t fuse3_buf_size(const struct fuse3_bufvec *bufv),
+{
+    (void)bufv;
+    return 0;
+})
+
+FSP_FUSE_SYM(
+ssize_t fuse3_buf_copy(struct fuse3_bufvec *dst, struct fuse3_bufvec *src,
+    enum fuse3_buf_copy_flags flags),
+{
+    (void)dst;
+    (void)src;
+    (void)flags;
+    return 0;
+})
+
+FSP_FUSE_SYM(
+int fuse3_daemonize(int foreground),
+{
+    return fsp_fuse_daemonize(foreground);
+})
+
+FSP_FUSE_SYM(
+int fuse3_set_signal_handlers(struct fuse3_session *se),
+{
+    return fsp_fuse_set_signal_handlers(se);
+})
+
+FSP_FUSE_SYM(
+void fuse3_remove_signal_handlers(struct fuse3_session *se),
+{
+    (void)se;
+    fsp_fuse_set_signal_handlers(0);
+})
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- a/inc/fuse3/fuse_opt.h
+++ b/inc/fuse3/fuse_opt.h
@@ -0,0 +1,19 @@
+/**
+ * @file fuse3/fuse_opt.h
+ * WinFsp FUSE3 compatible API.
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#include "../fuse/fuse_opt.h"
--- a/inc/fuse3/winfsp_fuse.h
+++ b/inc/fuse3/winfsp_fuse.h
@@ -0,0 +1,78 @@
+/**
+ * @file fuse3/winfsp_fuse.h
+ * WinFsp FUSE3 compatible API.
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#ifndef FUSE3_WINFSP_FUSE_H_INCLUDED
+#define FUSE3_WINFSP_FUSE_H_INCLUDED
+
+#include "../fuse/winfsp_fuse.h"
+
+#if defined(_WIN64) || defined(_WIN32)
+typedef intptr_t ssize_t;
+#endif
+
+#if !defined(WINFSP_DLL_INTERNAL)
+#define fuse3                           fuse
+#define fuse3_apply_conn_info_opts      fuse_apply_conn_info_opts
+#define fuse3_buf                       fuse_buf
+#define fuse3_buf_copy                  fuse_buf_copy
+#define fuse3_buf_copy_flags            fuse_buf_copy_flags
+#define fuse3_buf_flags                 fuse_buf_flags
+#define fuse3_buf_size                  fuse_buf_size
+#define fuse3_bufvec                    fuse_bufvec
+#define fuse3_clean_cache               fuse_clean_cache
+#define fuse3_config                    fuse_config
+#define fuse3_conn_info                 fuse_conn_info
+#define fuse3_conn_info_opts            fuse_conn_info_opts
+#define fuse3_context                   fuse_context
+#define fuse3_daemonize                 fuse_daemonize
+#define fuse3_destroy                   fuse_destroy
+#define fuse3_exit                      fuse_exit
+#define fuse3_file_info                 fuse_file_info
+#define fuse3_fill_dir_flags            fuse_fill_dir_flags
+#define fuse3_fill_dir_t                fuse_fill_dir_t
+#define fuse3_get_context               fuse_get_context
+#define fuse3_get_session               fuse_get_session
+#define fuse3_getgroups                 fuse_getgroups
+#define fuse3_interrupted               fuse_interrupted
+#define fuse3_invalidate_path           fuse_invalidate_path
+#define fuse3_lib_help                  fuse_lib_help
+#define fuse3_loop                      fuse_loop
+#define fuse3_loop_config               fuse_loop_config
+#define fuse3_loop_mt                   fuse_loop_mt
+#define fuse3_loop_mt_31                fuse_loop_mt_31
+#define fuse3_main_real                 fuse_main_real
+#define fuse3_mount                     fuse_mount
+#define fuse3_new                       fuse_new
+#define fuse3_new_30                    fuse_new_30
+#define fuse3_notify_poll               fuse_notify_poll
+#define fuse3_operations                fuse_operations
+#define fuse3_parse_conn_info_opts      fuse_parse_conn_info_opts
+#define fuse3_pkgversion                fuse_pkgversion
+#define fuse3_pollhandle                fuse_pollhandle
+#define fuse3_pollhandle_destroy        fuse_pollhandle_destroy
+#define fuse3_readdir_flags             fuse_readdir_flags
+#define fuse3_remove_signal_handlers    fuse_remove_signal_handlers
+#define fuse3_session                   fuse_session
+#define fuse3_set_signal_handlers       fuse_set_signal_handlers
+#define fuse3_start_cleanup_thread      fuse_start_cleanup_thread
+#define fuse3_stop_cleanup_thread       fuse_stop_cleanup_thread
+#define fuse3_unmount                   fuse_unmount
+#define fuse3_version                   fuse_version
+#endif
+
+#endif
--- a/src/dll/fuse/fuse.c
+++ b/src/dll/fuse/fuse.c
@@ -27,30 +27,7 @@ struct fuse_chan
 };

 #define FSP_FUSE_CORE_OPT(n, f, v)      { n, offsetof(struct fsp_fuse_core_opt_data, f), v }
-
-struct fsp_fuse_core_opt_data
-{
-    struct fsp_fuse_env *env;
-    int help, debug;
-    HANDLE DebugLogHandle;
-    int set_umask, umask,
-        set_create_umask, create_umask,
-        set_uid, uid,
-        set_gid, gid,
-        set_attr_timeout, attr_timeout,
-        rellinks;
-    int set_FileInfoTimeout,
-        set_DirInfoTimeout,
-        set_VolumeInfoTimeout,
-        set_KeepFileCache;
-    unsigned ThreadCount;
-    FSP_FSCTL_VOLUME_PARAMS VolumeParams;
-    UINT16 VolumeLabelLength;
-    WCHAR VolumeLabel[sizeof ((FSP_FSCTL_VOLUME_INFO *)0)->VolumeLabel / sizeof(WCHAR)];
-};
-FSP_FSCTL_STATIC_ASSERT(
-    sizeof ((struct fuse *)0)->VolumeLabel == sizeof ((struct fsp_fuse_core_opt_data *)0)->VolumeLabel,
-    "fuse::VolumeLabel and fsp_fuse_core_opt_data::VolumeLabel: sizeof must be same.");
+#define FSP_FUSE_CORE_OPT_NOHELP_IDX    4

 static struct fuse_opt fsp_fuse_core_opts[] =
 {
@@ -122,35 +99,6 @@ static struct fuse_opt fsp_fuse_core_opts[] =
 static INIT_ONCE fsp_fuse_initonce = INIT_ONCE_STATIC_INIT;
 static DWORD fsp_fuse_tlskey = TLS_OUT_OF_INDEXES;

-struct fsp_fuse_obj_hdr
-{
-    void (*dtor)(void *);
-    __declspec(align(MEMORY_ALLOCATION_ALIGNMENT)) UINT8 ObjectBuf[];
-};
-
-static inline void *fsp_fuse_obj_alloc(struct fsp_fuse_env *env, size_t size)
-{
-    struct fsp_fuse_obj_hdr *hdr;
-
-    hdr = env->memalloc(sizeof(struct fsp_fuse_obj_hdr) + size);
-    if (0 == hdr)
-        return 0;
-
-    hdr->dtor = env->memfree;
-    memset(hdr->ObjectBuf, 0, size);
-    return hdr->ObjectBuf;
-}
-
-static inline void fsp_fuse_obj_free(void *obj)
-{
-    if (0 == obj)
-        return;
-
-    struct fsp_fuse_obj_hdr *hdr = (PVOID)((PUINT8)obj - sizeof(struct fsp_fuse_obj_hdr));
-
-    hdr->dtor(hdr);
-}
-
 static BOOL WINAPI fsp_fuse_initialize(
    PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
 {
@@ -383,7 +331,7 @@ static NTSTATUS fsp_fuse_svcstart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)

        /* this should always fail with ENOSYS or EINVAL */
        err = f->ops.readlink("/", buf, sizeof buf);
-        f->has_symlinks = -ENOSYS != err;
+        f->has_symlinks = -ENOSYS_(f->env) != err;
    }

    /* the FSD does not currently limit these VolumeParams fields; do so here! */
@@ -575,6 +523,18 @@ static int fsp_fuse_core_opt_proc(void *opt_data0, const char *arg, int key,
    }
 }

+int fsp_fuse_core_opt_parse(struct fsp_fuse_env *env,
+    struct fuse_args *args, struct fsp_fuse_core_opt_data *opt_data,
+    int help)
+{
+    if (help)
+        return fsp_fuse_opt_parse(env, args, opt_data,
+            fsp_fuse_core_opts, fsp_fuse_core_opt_proc);
+    else
+        return fsp_fuse_opt_parse(env, args, opt_data,
+            fsp_fuse_core_opts + FSP_FUSE_CORE_OPT_NOHELP_IDX, fsp_fuse_core_opt_proc);
+}
+
 FSP_FUSE_API struct fuse *fsp_fuse_new(struct fsp_fuse_env *env,
    struct fuse_chan *ch, struct fuse_args *args,
    const struct fuse_operations *ops, size_t opsize, void *data)
@@ -595,7 +555,7 @@ FSP_FUSE_API struct fuse *fsp_fuse_new(struct fsp_fuse_env *env,
    opt_data.VolumeParams.FileInfoTimeout = 1000;
    opt_data.VolumeParams.FlushAndPurgeOnCleanup = TRUE;

-    if (-1 == fsp_fuse_opt_parse(env, args, &opt_data, fsp_fuse_core_opts, fsp_fuse_core_opt_proc))
+    if (-1 == fsp_fuse_core_opt_parse(env, args, &opt_data, /*help=*/1))
        return 0;
    if (opt_data.help)
        return 0;
@@ -788,6 +748,11 @@ FSP_FUSE_API struct fuse_context *fsp_fuse_get_context(struct fsp_fuse_env *env)
    return context;
 }

+struct fuse_context *fsp_fuse_get_context_internal(void)
+{
+    return TlsGetValue(fsp_fuse_tlskey);
+}
+
 FSP_FUSE_API int32_t fsp_fuse_ntstatus_from_errno(struct fsp_fuse_env *env,
    int err)
 {
--- a/src/dll/fuse/fuse_intf.c
+++ b/src/dll/fuse/fuse_intf.c
@@ -266,7 +266,7 @@ loopend:;
        if (0 != f->ops.getattr)
            err = f->ops.getattr(PosixHiddenPath, (void *)&stbuf);
        else
-            err = -ENOSYS;
+            err = -ENOSYS_(f->env);
    } while (0 == err && 0 < --maxtries);

    if (0 == err)
@@ -308,7 +308,7 @@ static BOOLEAN fsp_fuse_intf_CheckSymlinkDirectory(FSP_FILE_SYSTEM *FileSystem,
        if (0 != f->ops.getattr)
            err = f->ops.getattr(PosixDotPath, (void *)&stbuf);
        else
-            err = -ENOSYS;
+            err = -ENOSYS_(f->env);

        MemFree(PosixDotPath);

@@ -1427,7 +1427,8 @@ static NTSTATUS fsp_fuse_intf_SetFileSize(FSP_FILE_SYSTEM *FileSystem,
    return STATUS_SUCCESS;
 }

-static int fsp_fuse_intf_CanDeleteAddDirInfo(void *buf, const char *name,
+/* !static: used by fuse2to3 */
+int fsp_fuse_intf_CanDeleteAddDirInfo(void *buf, const char *name,
    const struct fuse_stat *stbuf, fuse_off_t off)
 {
    struct fuse_dirhandle *dh = buf;
@@ -1617,7 +1618,8 @@ exit:
    return Result;
 }

-static int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
+/* !static: used by fuse2to3 */
+int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
    const struct fuse_stat *stbuf, fuse_off_t off)
 {
    struct fuse_dirhandle *dh = buf;
--- a/src/dll/fuse/library.h
+++ b/src/dll/fuse/library.h
@@ -25,12 +25,14 @@
 #define FSP_FUSE_LIBRARY_NAME           LIBRARY_NAME "-FUSE"

 #define FSP_FUSE_HDR_FROM_CONTEXT(c)    \
-    (struct fsp_fuse_context_header *)((PUINT8)(c) - sizeof(struct fsp_fuse_context_header))
+    ((struct fsp_fuse_context_header *)((PUINT8)(c) - sizeof(struct fsp_fuse_context_header)))
 #define FSP_FUSE_CONTEXT_FROM_HDR(h)    \
-    (struct fuse_context *)((PUINT8)(h) + sizeof(struct fsp_fuse_context_header))
+    ((struct fuse_context *)((PUINT8)(h) + sizeof(struct fsp_fuse_context_header)))

 #define FSP_FUSE_HAS_SYMLINKS(f)        ((f)->has_symlinks)

+#define ENOSYS_(env)                    ('C' == (env)->environment ? 88 : 40)
+
 struct fuse
 {
    struct fsp_fuse_env *env;
@@ -54,6 +56,7 @@ struct fuse
    FSP_FILE_SYSTEM *FileSystem;
    FSP_SERVICE *Service; /* weak */
    volatile int exited;
+    struct fuse3 *fuse3;
 };

 struct fsp_fuse_context_header
@@ -87,6 +90,11 @@ NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
 NTSTATUS fsp_fuse_op_leave(FSP_FILE_SYSTEM *FileSystem,
    FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);

+int fsp_fuse_intf_CanDeleteAddDirInfo(void *buf, const char *name,
+    const struct fuse_stat *stbuf, fuse_off_t off);
+int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
+    const struct fuse_stat *stbuf, fuse_off_t off);
+
 extern FSP_FILE_SYSTEM_INTERFACE fsp_fuse_intf;

 NTSTATUS fsp_fuse_get_token_uidgid(
@@ -102,4 +110,65 @@ NTSTATUS fsp_fuse_get_token_uidgid(
 #define NFS_SPECFILE_LNK                0x00000000014b4e4c
 #define NFS_SPECFILE_SOCK               0x000000004B434F53

+/* FUSE obj alloc/free */
+
+struct fsp_fuse_obj_hdr
+{
+    void (*dtor)(void *);
+    __declspec(align(MEMORY_ALLOCATION_ALIGNMENT)) UINT8 ObjectBuf[];
+};
+
+static inline void *fsp_fuse_obj_alloc(struct fsp_fuse_env *env, size_t size)
+{
+    struct fsp_fuse_obj_hdr *hdr;
+
+    hdr = env->memalloc(sizeof(struct fsp_fuse_obj_hdr) + size);
+    if (0 == hdr)
+        return 0;
+
+    hdr->dtor = env->memfree;
+    memset(hdr->ObjectBuf, 0, size);
+    return hdr->ObjectBuf;
+}
+
+static inline void fsp_fuse_obj_free(void *obj)
+{
+    if (0 == obj)
+        return;
+
+    struct fsp_fuse_obj_hdr *hdr = (PVOID)((PUINT8)obj - sizeof(struct fsp_fuse_obj_hdr));
+
+    hdr->dtor(hdr);
+}
+
+struct fuse_context *fsp_fuse_get_context_internal(void);
+
+struct fsp_fuse_core_opt_data
+{
+    struct fsp_fuse_env *env;
+    int help, debug;
+    HANDLE DebugLogHandle;
+    int set_umask, umask,
+        set_create_umask, create_umask,
+        set_uid, uid,
+        set_gid, gid,
+        set_attr_timeout, attr_timeout,
+        rellinks;
+    int set_FileInfoTimeout,
+        set_DirInfoTimeout,
+        set_VolumeInfoTimeout,
+        set_KeepFileCache;
+    unsigned ThreadCount;
+    FSP_FSCTL_VOLUME_PARAMS VolumeParams;
+    UINT16 VolumeLabelLength;
+    WCHAR VolumeLabel[sizeof ((FSP_FSCTL_VOLUME_INFO *)0)->VolumeLabel / sizeof(WCHAR)];
+};
+FSP_FSCTL_STATIC_ASSERT(
+    sizeof ((struct fuse *)0)->VolumeLabel == sizeof ((struct fsp_fuse_core_opt_data *)0)->VolumeLabel,
+    "fuse::VolumeLabel and fsp_fuse_core_opt_data::VolumeLabel: sizeof must be same.");
+
+int fsp_fuse_core_opt_parse(struct fsp_fuse_env *env,
+    struct fuse_args *args, struct fsp_fuse_core_opt_data *opt_data,
+    int help);
+
 #endif
--- a/src/dll/fuse3/fuse2to3.c
+++ b/src/dll/fuse3/fuse2to3.c
@@ -0,0 +1,656 @@
+/**
+ * @file dll/fuse3/fuse2to3.c
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#include <dll/fuse3/library.h>
+
+static inline struct fuse3 *fuse2to3_getfuse3(void)
+{
+    return fsp_fuse_get_context_internal()->fuse->fuse3;
+}
+
+static inline void fuse2to3_fi2from3(struct fuse_file_info *fi, struct fuse3_file_info *fi3)
+{
+    memset(fi, 0, sizeof *fi);
+    fi->flags = fi3->flags;
+    fi->writepage = fi3->writepage;
+    fi->direct_io = fi3->direct_io;
+    fi->keep_cache = fi3->keep_cache;
+    fi->flush = fi3->flush;
+    fi->nonseekable = fi3->nonseekable;
+    fi->fh = fi3->fh;
+    fi->lock_owner = fi3->lock_owner;
+}
+
+static inline void fuse2to3_fi3from2(struct fuse3_file_info *fi3, struct fuse_file_info *fi)
+{
+    memset(fi3, 0, sizeof *fi3);
+    fi3->flags = fi->flags;
+    fi3->writepage = fi->writepage;
+    fi3->direct_io = fi->direct_io;
+    fi3->keep_cache = fi->keep_cache;
+    fi3->flush = fi->flush;
+    fi3->nonseekable = fi->nonseekable;
+    fi3->fh = fi->fh;
+    fi3->lock_owner = fi->lock_owner;
+}
+
+static inline void fuse2to3_conn3from2(struct fuse3_conn_info *conn3, struct fuse_conn_info *conn)
+{
+    memset(conn3, 0, sizeof *conn3);
+    conn3->proto_major = 7;             /* pretend that we are FUSE kernel protocol 7.26 */
+    conn3->proto_minor = 26;            /*     which was current at the time of FUSE 3.2 */
+    conn3->max_write = conn->max_write;
+    conn3->max_read = conn->max_write;
+    conn3->max_readahead = conn->max_readahead;
+    conn3->capable = (conn->capable & ~FSP_FUSE_CAP_READDIR_PLUS) | FUSE_CAP_READDIRPLUS;
+    conn3->want = conn->want;
+}
+
+static int fuse2to3_getattr(const char *path, struct fuse_stat *stbuf)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.getattr(path, stbuf, 0);
+}
+
+static int fuse2to3_readlink(const char *path, char *buf, size_t size)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.readlink(path, buf, size);
+}
+
+static int fuse2to3_mknod(const char *path, fuse_mode_t mode, fuse_dev_t dev)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.mknod(path, mode, dev);
+}
+
+static int fuse2to3_mkdir(const char *path, fuse_mode_t mode)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.mkdir(path, mode);
+}
+
+static int fuse2to3_unlink(const char *path)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.unlink(path);
+}
+
+static int fuse2to3_rmdir(const char *path)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.rmdir(path);
+}
+
+static int fuse2to3_symlink(const char *dstpath, const char *srcpath)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.symlink(dstpath, srcpath);
+}
+
+static int fuse2to3_rename(const char *oldpath, const char *newpath)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.rename(oldpath, newpath, 0);
+}
+
+static int fuse2to3_link(const char *srcpath, const char *dstpath)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.link(srcpath, dstpath);
+}
+
+static int fuse2to3_chmod(const char *path, fuse_mode_t mode)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.chmod(path, mode, 0);
+}
+
+static int fuse2to3_chown(const char *path, fuse_uid_t uid, fuse_gid_t gid)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.chown(path, uid, gid, 0);
+}
+
+static int fuse2to3_truncate(const char *path, fuse_off_t size)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.truncate(path, size, 0);
+}
+
+static int fuse2to3_open(const char *path, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.open(path, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_read(const char *path, char *buf, size_t size, fuse_off_t off,
+    struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.read(path, buf, size, off, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_write(const char *path, const char *buf, size_t size, fuse_off_t off,
+    struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.write(path, buf, size, off, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_statfs(const char *path, struct fuse_statvfs *stbuf)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.statfs(path, stbuf);
+}
+
+static int fuse2to3_flush(const char *path, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.flush(path, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_release(const char *path, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.release(path, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_fsync(const char *path, int datasync, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.fsync(path, datasync, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_setxattr(const char *path, const char *name, const char *value, size_t size,
+    int flags)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.setxattr(path, name, value, size, flags);
+}
+
+static int fuse2to3_getxattr(const char *path, const char *name, char *value, size_t size)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.getxattr(path, name, value, size);
+}
+
+static int fuse2to3_listxattr(const char *path, char *namebuf, size_t size)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.listxattr(path, namebuf, size);
+}
+
+static int fuse2to3_removexattr(const char *path, const char *name)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.removexattr(path, name);
+}
+
+static int fuse2to3_opendir(const char *path, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.opendir(path, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_candel_filldir(void *buf, const char *name,
+    const struct fuse_stat *stbuf, fuse_off_t off,
+    enum fuse3_fill_dir_flags flags)
+{
+    return fsp_fuse_intf_CanDeleteAddDirInfo(buf, name, 0, off);
+}
+
+static int fuse2to3_filldir(void *buf, const char *name,
+    const struct fuse_stat *stbuf, fuse_off_t off,
+    enum fuse3_fill_dir_flags flags)
+{
+    return 0 != (flags & FUSE_FILL_DIR_PLUS) ?
+        fsp_fuse_intf_AddDirInfo(buf, name, stbuf, off) :
+        fsp_fuse_intf_AddDirInfo(buf, name, 0, off);
+}
+
+static int fuse2to3_readdir(const char *path, void *buf, fuse_fill_dir_t filler, fuse_off_t off,
+    struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse_dirhandle *dh = buf;
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res;
+    if (fsp_fuse_intf_CanDeleteAddDirInfo == filler)
+        res = f3->ops.readdir(path, buf, &fuse2to3_candel_filldir, off, &fi3, 0);
+    else if (fsp_fuse_intf_AddDirInfo == filler)
+        res = f3->ops.readdir(path, buf, &fuse2to3_filldir, off, &fi3,
+            dh->ReaddirPlus ? FUSE_READDIR_PLUS : 0);
+    else
+    {
+        FspDebugLog("fuse2to3_readdir = -ENOSYS (internal error: unknown filler)\n");
+        res = -ENOSYS_(f3->fuse->env);
+    }
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_releasedir(const char *path, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.releasedir(path, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_fsyncdir(const char *path, int datasync, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.fsyncdir(path, datasync, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static void *fuse2to3_init(struct fuse_conn_info *conn)
+{
+    struct fuse_context *context = fsp_fuse_get_context_internal();
+    struct fuse *f = context->fuse;
+    struct fuse3 *f3 = f->fuse3;
+
+    struct fuse3_conn_info conn3;
+    fuse2to3_conn3from2(&conn3, conn);
+
+    struct fuse3_config conf3;
+    memset(&conf3, 0, sizeof conf3);
+    conf3.set_gid = f->set_gid;
+    conf3.gid = f->gid;
+    conf3.set_uid = f->set_uid;
+    conf3.uid = f->uid;
+    conf3.set_mode = f->set_umask;
+    conf3.umask = f->umask;
+#if 0
+    /*
+     * Cannot set timeouts because of lack of floating point support.
+     *
+     * FUSE uses the `double` type for timeouts. This DLL does not use the standard library
+     * for a variety of reasons. This means that we cannot easily perform the computations
+     * below.
+     *
+     * If this becomes important (double) floating point values could perhaps be calculated
+     * using bit tricks. See below:
+     * - http://locklessinc.com/articles/i2f/
+     * - https://stackoverflow.com/a/20308114
+     */
+    conf3.entry_timeout = f->VolumeParams.DirInfoTimeoutValid ?
+        f->VolumeParams.DirInfoTimeout / 1000 : f->VolumeParams.FileInfoTimeout / 1000;
+    conf3.negative_timeout = 0;
+    conf3.attr_timeout = f->VolumeParams.FileInfoTimeout / 1000;
+    conf3.ac_attr_timeout = conf3.attr_timeout;
+#endif
+
+    void *res = f3->ops.init(&conn3, &conf3);
+
+    conn->max_write = conn3.max_write;
+    conn->max_readahead = conn3.max_readahead;
+    conn->want = 0 != (conn3.want & FUSE_CAP_READDIRPLUS) ? FSP_FUSE_CAP_READDIR_PLUS : 0;
+    conn->want |= conn3.want & ~FUSE_CAP_READDIRPLUS;
+
+    return res;
+}
+
+static void fuse2to3_destroy(void *data)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    f3->ops.destroy(data);
+}
+
+static int fuse2to3_access(const char *path, int mask)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.access(path, mask);
+}
+
+static int fuse2to3_create(const char *path, fuse_mode_t mode, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.create(path, mode, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_ftruncate(const char *path, fuse_off_t off, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.truncate(path, off, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_fgetattr(const char *path, struct fuse_stat *stbuf, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.getattr(path, stbuf, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_lock(const char *path,
+    struct fuse_file_info *fi, int cmd, struct fuse_flock *lock)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.lock(path, &fi3, cmd, lock);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_utimens(const char *path, const struct fuse_timespec tv[2])
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.utimens(path, tv, 0);
+}
+
+static int fuse2to3_bmap(const char *path, size_t blocksize, uint64_t *idx)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    return f3->ops.bmap(path, blocksize, idx);
+}
+
+static int fuse2to3_ioctl(const char *path, int cmd, void *arg, struct fuse_file_info *fi,
+    unsigned int flags, void *data)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.ioctl(path, cmd, arg, &fi3, flags, data);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_poll(const char *path, struct fuse_file_info *fi,
+    struct fuse_pollhandle *ph, unsigned *reventsp)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.poll(path, &fi3, (struct fuse3_pollhandle *)ph, reventsp);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_write_buf(const char *path,
+    struct fuse_bufvec *buf, fuse_off_t off, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.write_buf(path,
+        (struct fuse3_bufvec *)buf, /* revisit if we implement bufvec's */
+        off, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_read_buf(const char *path,
+    struct fuse_bufvec **bufp, size_t size, fuse_off_t off, struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.read_buf(path,
+        (struct fuse3_bufvec **)bufp, /* revisit if we implement bufvec's */
+        size, off, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_flock(const char *path, struct fuse_file_info *fi, int op)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.flock(path, &fi3, op);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fuse2to3_fallocate(const char *path, int mode, fuse_off_t off, fuse_off_t len,
+    struct fuse_file_info *fi)
+{
+    struct fuse3 *f3 = fuse2to3_getfuse3();
+    struct fuse3_file_info fi3;
+    fuse2to3_fi3from2(&fi3, fi);
+    int res = f3->ops.fallocate(path, mode, off, len, &fi3);
+    fuse2to3_fi2from3(fi, &fi3);
+    return res;
+}
+
+static int fsp_fuse3_copy_args(struct fsp_fuse_env *env,
+    const struct fuse_args *args,
+    struct fuse_args *outargs)
+{
+    outargs->argc = 0;
+    outargs->argv = 0;
+    outargs->allocated = 0;
+
+    for (int argi = 0; args->argc > argi; argi++)
+        if (-1 == fsp_fuse_opt_add_arg(env, outargs, args->argv[argi]))
+            goto fail;
+
+    return 0;
+
+fail:
+    fsp_fuse_opt_free_args(env, outargs);
+
+    return -1;
+}
+
+static struct fuse3 *fsp_fuse3_new_common(struct fsp_fuse_env *env,
+    struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data,
+    int help)
+{
+    /* preflight args */
+    struct fsp_fuse_core_opt_data opt_data;
+    struct fuse_args pfargs;
+    memset(&opt_data, 0, sizeof opt_data);
+    if (-1 == fsp_fuse3_copy_args(env, args, &pfargs))
+        return 0;
+    int optres = fsp_fuse_core_opt_parse(env, &pfargs, &opt_data, /*help=*/1);
+    fsp_fuse_opt_free_args(env, &pfargs);
+    if (-1 == optres)
+        return 0;
+    if (opt_data.help)
+        return 0;
+
+    struct fuse3 *f3 = 0;
+
+    if (opsize > sizeof(struct fuse3_operations))
+        opsize = sizeof(struct fuse3_operations);
+
+    f3 = fsp_fuse_obj_alloc(env, sizeof *f3);
+    if (0 == f3)
+        goto fail;
+
+    if (-1 == fsp_fuse3_copy_args(env, args, &f3->args))
+        goto fail;
+    memcpy(&f3->ops, ops, opsize);
+    f3->data = data;
+
+    return f3;
+
+fail:
+    if (0 != f3)
+        fsp_fuse3_destroy(env, f3);
+
+    return 0;
+}
+
+FSP_FUSE_API struct fuse3 *fsp_fuse3_new_30(struct fsp_fuse_env *env,
+    struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data)
+{
+    return fsp_fuse3_new_common(env, args, ops, opsize, data, /*help=*/1);
+}
+
+FSP_FUSE_API struct fuse3 *fsp_fuse3_new(struct fsp_fuse_env *env,
+    struct fuse_args *args,
+    const struct fuse3_operations *ops, size_t opsize, void *data)
+{
+    return fsp_fuse3_new_common(env, args, ops, opsize, data, /*help=*/0);
+}
+
+FSP_FUSE_API void fsp_fuse3_destroy(struct fsp_fuse_env *env,
+    struct fuse3 *f3)
+{
+    if (0 != f3->fuse)
+        fsp_fuse_destroy(env, f3->fuse);
+
+    fsp_fuse_opt_free_args(env, &f3->args);
+
+    fsp_fuse_obj_free(f3);
+}
+
+FSP_FUSE_API int fsp_fuse3_mount(struct fsp_fuse_env *env,
+    struct fuse3 *f3, const char *mountpoint)
+{
+    struct fuse_chan *ch = 0;
+    struct fuse *f = 0;
+    struct fuse_operations fuse2to3_ops =
+    {
+        .getattr = 0 != f3->ops.getattr ? fuse2to3_getattr : 0,
+        .readlink = 0 != f3->ops.readlink ? fuse2to3_readlink : 0,
+        .mknod = 0 != f3->ops.mknod ? fuse2to3_mknod : 0,
+        .mkdir = 0 != f3->ops.mkdir ? fuse2to3_mkdir : 0,
+        .unlink = 0 != f3->ops.unlink ? fuse2to3_unlink : 0,
+        .rmdir = 0 != f3->ops.rmdir ? fuse2to3_rmdir : 0,
+        .symlink = 0 != f3->ops.symlink ? fuse2to3_symlink : 0,
+        .rename = 0 != f3->ops.rename ? fuse2to3_rename : 0,
+        .link = 0 != f3->ops.link ? fuse2to3_link : 0,
+        .chmod = 0 != f3->ops.chmod ? fuse2to3_chmod : 0,
+        .chown = 0 != f3->ops.chown ? fuse2to3_chown : 0,
+        .truncate = 0 != f3->ops.truncate ? fuse2to3_truncate : 0,
+        .open = 0 != f3->ops.open ? fuse2to3_open : 0,
+        .read = 0 != f3->ops.read ? fuse2to3_read : 0,
+        .write = 0 != f3->ops.write ? fuse2to3_write : 0,
+        .statfs = 0 != f3->ops.statfs ? fuse2to3_statfs : 0,
+        .flush = 0 != f3->ops.flush ? fuse2to3_flush : 0,
+        .release = 0 != f3->ops.release ? fuse2to3_release : 0,
+        .fsync = 0 != f3->ops.fsync ? fuse2to3_fsync : 0,
+        .setxattr = 0 != f3->ops.setxattr ? fuse2to3_setxattr : 0,
+        .getxattr = 0 != f3->ops.getxattr ? fuse2to3_getxattr : 0,
+        .listxattr = 0 != f3->ops.listxattr ? fuse2to3_listxattr : 0,
+        .removexattr = 0 != f3->ops.removexattr ? fuse2to3_removexattr : 0,
+        .opendir = 0 != f3->ops.opendir ? fuse2to3_opendir : 0,
+        .readdir = 0 != f3->ops.readdir ? fuse2to3_readdir : 0,
+        .releasedir = 0 != f3->ops.releasedir ? fuse2to3_releasedir : 0,
+        .fsyncdir = 0 != f3->ops.fsyncdir ? fuse2to3_fsyncdir : 0,
+        .init = 0 != f3->ops.init ? fuse2to3_init : 0,
+        .destroy = 0 != f3->ops.destroy ? fuse2to3_destroy : 0,
+        .access = 0 != f3->ops.access ? fuse2to3_access : 0,
+        .create = 0 != f3->ops.create ? fuse2to3_create : 0,
+        .ftruncate = 0 != f3->ops.truncate ? fuse2to3_ftruncate : 0,
+        .fgetattr = 0 != f3->ops.getattr ? fuse2to3_fgetattr : 0,
+        .lock = 0 != f3->ops.lock ? fuse2to3_lock : 0,
+        .utimens = 0 != f3->ops.utimens ? fuse2to3_utimens : 0,
+        .bmap = 0 != f3->ops.bmap ? fuse2to3_bmap : 0,
+        .ioctl = 0 != f3->ops.ioctl ? fuse2to3_ioctl : 0,
+        .poll = 0 != f3->ops.poll ? fuse2to3_poll : 0,
+        .write_buf = 0 != f3->ops.write_buf ? fuse2to3_write_buf : 0,
+        .read_buf = 0 != f3->ops.read_buf ? fuse2to3_read_buf : 0,
+        .flock = 0 != f3->ops.flock ? fuse2to3_flock : 0,
+        .fallocate = 0 != f3->ops.fallocate ? fuse2to3_fallocate : 0,
+    };
+
+    ch = fsp_fuse_mount(env, mountpoint, &f3->args);
+    if (0 == ch)
+        goto fail;
+
+    f = fsp_fuse_new(env, ch, &f3->args, &fuse2to3_ops, sizeof fuse2to3_ops, f3->data);
+    if (0 == f)
+        goto fail;
+
+    /*
+     * Free the fuse_chan which is no longer needed. Note that this behavior is WinFsp-FUSE
+     * specific, because WinFsp-FUSE only allocates/frees fuse_chan memory during fuse_mount/
+     * fuse_unmount and does not perform any actual mounting/unmounting. This would not work
+     * on a different FUSE implementation.
+     *
+     * (Store mountpoint and ch inside struct fuse3 so that they can be freed during fuse_destroy
+     * in that case.)
+     */
+    fsp_fuse_unmount(env, mountpoint, ch);
+
+    /* Free the args which are no longer needed. */
+    fsp_fuse_opt_free_args(env, &f3->args);
+
+    f->fuse3 = f3;
+    f3->fuse = f;
+
+    return 0;
+
+fail:
+    if (0 != f)
+        fsp_fuse_destroy(env, f);
+
+    if (0 != ch)
+        fsp_fuse_unmount(env, mountpoint, ch);
+
+    return -1;
+}
+
+FSP_FUSE_API void fsp_fuse3_unmount(struct fsp_fuse_env *env,
+    struct fuse3 *f3)
+{
+    fsp_fuse_destroy(env, f3->fuse);
+    f3->fuse = 0;
+}
--- a/src/dll/fuse3/fuse3.c
+++ b/src/dll/fuse3/fuse3.c
@@ -0,0 +1,152 @@
+/**
+ * @file dll/fuse3/fuse3.c
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#include <dll/fuse3/library.h>
+
+FSP_FUSE_API int fsp_fuse3_main_real(struct fsp_fuse_env *env,
+    int argc, char *argv[],
+    const struct fuse3_operations *ops, size_t opsize, void *data)
+{
+    struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+    char *mountpoint = 0;
+    int multithreaded = 0;
+    int foreground = 0;
+    struct fuse3 *f3 = 0;
+    int mounted = 0;
+    int signal_handlers = 0;
+    int result;
+
+    result = fsp_fuse_parse_cmdline(env, &args, &mountpoint, &multithreaded, &foreground);
+    if (-1 == result)
+        goto exit;
+
+    f3 = fsp_fuse3_new_30(env, &args, ops, opsize, data);
+    if (0 == f3)
+    {
+        result = -1;
+        goto exit;
+    }
+
+    result = fsp_fuse3_mount(env, f3, mountpoint);
+    if (-1 == result)
+        goto exit;
+    mounted = 1;
+
+    result = env->daemonize(foreground);
+    if (-1 == result)
+        goto exit;
+
+    result = env->set_signal_handlers(f3);
+    if (-1 == result)
+        goto exit;
+    signal_handlers = 1;
+
+    result = multithreaded ? fsp_fuse3_loop_mt(env, f3, 0) : fsp_fuse3_loop(env, f3);
+
+exit:
+    if (signal_handlers)
+        env->set_signal_handlers(0);
+
+    if (mounted)
+        fsp_fuse3_unmount(env, f3);
+
+    if (0 != f3)
+        fsp_fuse3_destroy(env, f3);
+
+    env->memfree(mountpoint);
+
+    fsp_fuse_opt_free_args(env, &args);
+
+    /* main() style return: 0 success, 1 error */
+    return !!result;
+}
+
+FSP_FUSE_API void fsp_fuse3_lib_help(struct fsp_fuse_env *env,
+    struct fuse_args *args)
+{
+    char *helpargv[] =
+    {
+        "UNKNOWN",
+        "-h",
+        0
+    };
+    struct fuse_args helpargs = FUSE_ARGS_INIT(2, helpargv);
+    struct fsp_fuse_core_opt_data opt_data;
+
+    memset(&opt_data, 0, sizeof opt_data);
+    fsp_fuse_core_opt_parse(env, &helpargs, &opt_data, /*help=*/1);
+}
+
+FSP_FUSE_API int fsp_fuse3_loop(struct fsp_fuse_env *env,
+    struct fuse3 *f3)
+{
+    return 0 == fsp_fuse_loop(env, f3->fuse) ? 0 : -EINVAL/* same on MSVC and Cygwin */;
+}
+
+FSP_FUSE_API int fsp_fuse3_loop_mt_31(struct fsp_fuse_env *env,
+    struct fuse3 *f3, int clone_fd)
+{
+    return 0 == fsp_fuse_loop_mt(env, f3->fuse) ? 0 : -EINVAL/* same on MSVC and Cygwin */;
+}
+
+FSP_FUSE_API int fsp_fuse3_loop_mt(struct fsp_fuse_env *env,
+    struct fuse3 *f3, struct fuse3_loop_config *config)
+{
+    return 0 == fsp_fuse_loop_mt(env, f3->fuse) ? 0 : -EINVAL/* same on MSVC and Cygwin */;
+}
+
+FSP_FUSE_API void fsp_fuse3_exit(struct fsp_fuse_env *env,
+    struct fuse3 *f3)
+{
+    fsp_fuse_exit(env, f3->fuse);
+}
+
+FSP_FUSE_API struct fuse3_context *fsp_fuse3_get_context(struct fsp_fuse_env *env)
+{
+    FSP_FSCTL_STATIC_ASSERT(
+        sizeof(struct fuse_context) == sizeof(struct fuse3_context),
+        "incompatible structs fuse_context and fuse3_context");
+    FSP_FSCTL_STATIC_ASSERT(FIELD_OFFSET(
+        struct fuse_context, private_data) == FIELD_OFFSET(struct fuse3_context, private_data),
+        "incompatible structs fuse_context and fuse3_context");
+    return (struct fuse3_context *)fsp_fuse_get_context(env);
+}
+
+FSP_FUSE_API struct fuse3_conn_info_opts *fsp_fuse3_parse_conn_info_opts(
+    struct fsp_fuse_env *env,
+    struct fuse_args *args)
+{
+    static int dummy;
+    return (struct fuse3_conn_info_opts *)&dummy;
+}
+
+FSP_FUSE_API void fsp_fuse3_apply_conn_info_opts(struct fsp_fuse_env *env,
+    struct fuse3_conn_info_opts *opts, struct fuse3_conn_info *conn)
+{
+}
+
+FSP_FUSE_API int fsp_fuse3_version(struct fsp_fuse_env *env)
+{
+    return FUSE_VERSION;
+}
+
+FSP_FUSE_API const char *fsp_fuse3_pkgversion(struct fsp_fuse_env *env)
+{
+#define STR(x)                          #x
+    return STR(FUSE_MAJOR_VERSION) "." STR(FUSE_MINOR_VERSION);
+#undef STR
+}
--- a/src/dll/fuse3/fuse3.pc.in
+++ b/src/dll/fuse3/fuse3.pc.in
@@ -0,0 +1,10 @@
+prefix=${pcfiledir}/..
+incdir=${prefix}/inc/fuse3
+implib=${prefix}/bin/winfsp-${arch}.dll
+
+Name: fuse3
+Description: WinFsp FUSE3 compatible API
+Version: 3.2
+URL: http://www.secfs.net/winfsp/
+Libs: "${implib}"
+Cflags: -I"${incdir}"
--- a/src/dll/fuse3/library.h
+++ b/src/dll/fuse3/library.h
@@ -0,0 +1,37 @@
+/**
+ * @file dll/fuse3/library.h
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#ifndef WINFSP_DLL_FUSE3_LIBRARY_H_INCLUDED
+#define WINFSP_DLL_FUSE3_LIBRARY_H_INCLUDED
+
+#include <dll/fuse/library.h>
+#undef FUSE_H_
+#undef FUSE_COMMON_H_
+#undef FUSE_MAJOR_VERSION
+#undef FUSE_MINOR_VERSION
+#undef fuse_main
+#include <fuse3/fuse.h>
+
+struct fuse3
+{
+    struct fuse_args args;
+    struct fuse3_operations ops;
+    void *data;
+    struct fuse *fuse;
+};
+
+#endif
--- a/tools/run-tests.bat
+++ b/tools/run-tests.bat
@@ -83,6 +83,10 @@ set opt_tests=^
    sample-fsx-passthrough-fuse-x64 ^
    sample-passthrough-fuse-x86 ^
    sample-fsx-passthrough-fuse-x86 ^
+    sample-passthrough-fuse3-x64 ^
+    sample-fsx-passthrough-fuse3-x64 ^
+    sample-passthrough-fuse3-x86 ^
+    sample-fsx-passthrough-fuse3-x86 ^
    sample-passthrough-dotnet ^
    compat-v1.2-memfs-x64 ^
    compat-v1.2-memfs-x86 ^
@@ -707,6 +711,28 @@ call :__run_sample_fsx_fuse_test passthrough-fuse x86 passthrough-fuse-x86 fsx
 if !ERRORLEVEL! neq 0 goto fail
 exit /b 0

+:sample-passthrough-fuse3-x64
+call :__run_sample_fuse_test passthrough-fuse3 x64 passthrough-fuse3-x64 winfsp-tests-x64 ^
+    "-create_fileattr_test -setfileinfo_test"
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-passthrough-fuse3-x86
+call :__run_sample_fuse_test passthrough-fuse3 x86 passthrough-fuse3-x86 winfsp-tests-x86 ^
+    "-create_fileattr_test -setfileinfo_test"
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-fsx-passthrough-fuse3-x64
+call :__run_sample_fsx_fuse_test passthrough-fuse3 x64 passthrough-fuse3-x64 fsx
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
+:sample-fsx-passthrough-fuse3-x86
+call :__run_sample_fsx_fuse_test passthrough-fuse3 x86 passthrough-fuse3-x86 fsx
+if !ERRORLEVEL! neq 0 goto fail
+exit /b 0
+
 :__run_sample_disk_test
 set RunSampleTestExit=0
 call %ProjRoot%\tools\build-sample %Configuration% %2 %1 "%TMP%\%1"
@@ -783,11 +809,16 @@ net use | findstr L:
 pushd >nul
 cd L: >nul 2>nul || (echo Unable to find drive L: >&2 & goto fail)
 L:
-"%ProjRoot%\build\VStudio\build\%Configuration%\%4.exe" ^
-    --external --resilient --case-insensitive-cmp --share-prefix="\%1\%TMP::=$%\%1\test" ^
-    -create_allocation_test -create_notraverse_test -create_backup_test -create_restore_test -create_namelen_test ^
-    -getfileinfo_name_test -delete_access_test -delete_mmap_test -rename_flipflop_test -rename_mmap_test -setsecurity_test -querydir_namelen_test -exec_rename_dir_test ^
-    -reparse* -stream*
+if X%5==XNOEXCL (
+    "%ProjRoot%\build\VStudio\build\%Configuration%\%4.exe" ^
+        --external --resilient
+) else (
+    "%ProjRoot%\build\VStudio\build\%Configuration%\%4.exe" ^
+        --external --resilient --case-insensitive-cmp --share-prefix="\%1\%TMP::=$%\%1\test" ^
+        -create_allocation_test -create_notraverse_test -create_backup_test -create_restore_test -create_namelen_test ^
+        -getfileinfo_name_test -delete_access_test -delete_mmap_test -rename_flipflop_test -rename_mmap_test -setsecurity_test -querydir_namelen_test -exec_rename_dir_test ^
+        -reparse* -stream* %~5
+)
 if !ERRORLEVEL! neq 0 set RunSampleTestExit=1
 popd
 echo net use L: /delete
--- a/tst/passthrough-fuse3/.gitignore
+++ b/tst/passthrough-fuse3/.gitignore
@@ -0,0 +1,7 @@
+build
+*.ncb
+*.suo
+*.vcproj.*
+*.vcxproj.user
+*.exe
+*.install
--- a/tst/passthrough-fuse3/Makefile
+++ b/tst/passthrough-fuse3/Makefile
@@ -0,0 +1,18 @@
+usage:
+	@echo "make cygfuse3|winfsp-fuse3" 1>&2
+	@echo "" 1>&2
+	@echo "   cygfuse3        Link with CYGFUSE3" 1>&2
+	@echo "   winfsp-fuse3    Link with WinFsp-FUSE3" 1>&2
+	@exit 2
+
+cygfuse3: passthrough-cygfuse3
+
+winfsp-fuse3: passthrough-winfsp-fuse3
+
+passthrough-cygfuse3: passthrough-fuse3.c
+	gcc $^ -o $@ -g -Wall `pkg-config fuse3 --cflags --libs`
+
+passthrough-winfsp-fuse3: export PKG_CONFIG_PATH=$(PWD)/winfsp.install/lib
+passthrough-winfsp-fuse3: passthrough-fuse3.c
+	ln -nsf "`regtool --wow32 get '/HKLM/Software/WinFsp/InstallDir' | cygpath -au -f -`" winfsp.install
+	gcc $^ -o $@ -g -Wall `pkg-config fuse3 --cflags --libs`
--- a/tst/passthrough-fuse3/README.md
+++ b/tst/passthrough-fuse3/README.md
@@ -0,0 +1,7 @@
+`Passthrough-fuse3` is a simple FUSE3 file system that passes all file system operations to an underlying file system.
+
+It can be built with the following tools:
+
+- Using Visual Studio (`winfsp.sln`).
+- Using Cygwin GCC and linking directly with the WinFsp DLL (`make winfsp-fuse3`).
+- Using Cygwin GCC and linking to CYGFUSE3 (`make cygfuse3`).
--- a/tst/passthrough-fuse3/passthrough-fuse3.c
+++ b/tst/passthrough-fuse3/passthrough-fuse3.c
@@ -0,0 +1,331 @@
+/**
+ * @file passthrough-fuse.c
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <fuse.h>
+
+#if defined(_WIN64) || defined(_WIN32)
+#include "winposix.h"
+#else
+#include <dirent.h>
+#include <unistd.h>
+#endif
+
+#define FSNAME                          "passthrough"
+#define PROGNAME                        "passthrough-fuse"
+
+#define concat_path(ptfs, fn, fp)       (sizeof fp > (unsigned)snprintf(fp, sizeof fp, "%s%s", ptfs->rootdir, fn))
+
+#define fi_dirbit                       (0x8000000000000000ULL)
+#define fi_fh(fi, MASK)                 ((fi)->fh & (MASK))
+#define fi_setfh(fi, FH, MASK)          ((fi)->fh = (intptr_t)(FH) | (MASK))
+#define fi_fd(fi)                       (fi_fh(fi, fi_dirbit) ? \
+    dirfd((DIR *)(intptr_t)fi_fh(fi, ~fi_dirbit)) : (int)fi_fh(fi, ~fi_dirbit))
+#define fi_dirp(fi)                     ((DIR *)(intptr_t)fi_fh(fi, ~fi_dirbit))
+#define fi_setfd(fi, fd)                (fi_setfh(fi, fd, 0))
+#define fi_setdirp(fi, dirp)            (fi_setfh(fi, dirp, fi_dirbit))
+
+#define ptfs_impl_fullpath(n)           \
+    char full ## n[PATH_MAX];           \
+    if (!concat_path(((PTFS *)fuse_get_context()->private_data), n, full ## n))\
+        return -ENAMETOOLONG;           \
+    n = full ## n
+
+typedef struct
+{
+    const char *rootdir;
+} PTFS;
+
+static int ptfs_getattr(const char *path, struct fuse_stat *stbuf, struct fuse_file_info *fi)
+{
+    if (0 == fi)
+    {
+        ptfs_impl_fullpath(path);
+
+        return -1 != lstat(path, stbuf) ? 0 : -errno;
+    }
+    else
+    {
+        int fd = fi_fd(fi);
+
+        return -1 != fstat(fd, stbuf) ? 0 : -errno;
+    }
+}
+
+static int ptfs_mkdir(const char *path, fuse_mode_t mode)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != mkdir(path, mode) ? 0 : -errno;
+}
+
+static int ptfs_unlink(const char *path)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != unlink(path) ? 0 : -errno;
+}
+
+static int ptfs_rmdir(const char *path)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != rmdir(path) ? 0 : -errno;
+}
+
+static int ptfs_rename(const char *oldpath, const char *newpath, unsigned int flags)
+{
+    ptfs_impl_fullpath(newpath);
+    ptfs_impl_fullpath(oldpath);
+
+    return -1 != rename(oldpath, newpath) ? 0 : -errno;
+}
+
+static int ptfs_chmod(const char *path, fuse_mode_t mode, struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != chmod(path, mode) ? 0 : -errno;
+}
+
+static int ptfs_chown(const char *path, fuse_uid_t uid, fuse_gid_t gid, struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != lchown(path, uid, gid) ? 0 : -errno;
+}
+
+static int ptfs_truncate(const char *path, fuse_off_t size, struct fuse_file_info *fi)
+{
+    if (0 == fi)
+    {
+        ptfs_impl_fullpath(path);
+
+        return -1 != truncate(path, size) ? 0 : -errno;
+    }
+    else
+    {
+        int fd = fi_fd(fi);
+
+        return -1 != ftruncate(fd, size) ? 0 : -errno;
+    }
+}
+
+static int ptfs_open(const char *path, struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    int fd;
+    return -1 != (fd = open(path, fi->flags)) ? (fi_setfd(fi, fd), 0) : -errno;
+}
+
+static int ptfs_read(const char *path, char *buf, size_t size, fuse_off_t off,
+    struct fuse_file_info *fi)
+{
+    int fd = fi_fd(fi);
+
+    int nb;
+    return -1 != (nb = pread(fd, buf, size, off)) ? nb : -errno;
+}
+
+static int ptfs_write(const char *path, const char *buf, size_t size, fuse_off_t off,
+    struct fuse_file_info *fi)
+{
+    int fd = fi_fd(fi);
+
+    int nb;
+    return -1 != (nb = pwrite(fd, buf, size, off)) ? nb : -errno;
+}
+
+static int ptfs_statfs(const char *path, struct fuse_statvfs *stbuf)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != statvfs(path, stbuf) ? 0 : -errno;
+}
+
+static int ptfs_release(const char *path, struct fuse_file_info *fi)
+{
+    int fd = fi_fd(fi);
+
+    close(fd);
+    return 0;
+}
+
+static int ptfs_fsync(const char *path, int datasync, struct fuse_file_info *fi)
+{
+    int fd = fi_fd(fi);
+
+    return -1 != fsync(fd) ? 0 : -errno;
+}
+
+static int ptfs_opendir(const char *path, struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    DIR *dirp;
+    return 0 != (dirp = opendir(path)) ? (fi_setdirp(fi, dirp), 0) : -errno;
+}
+
+static int ptfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, fuse_off_t off,
+    struct fuse_file_info *fi, enum fuse_readdir_flags flags)
+{
+    DIR *dirp = fi_dirp(fi);
+    struct dirent *de;
+
+    rewinddir(dirp);
+    for (;;)
+    {
+        errno = 0;
+        if (0 == (de = readdir(dirp)))
+            break;
+#if defined(_WIN64) || defined(_WIN32)
+        if (0 != filler(buf, de->d_name, &de->d_stat, 0, FUSE_FILL_DIR_PLUS))
+#else
+        if (0 != filler(buf, de->d_name, 0, 0, 0))
+#endif
+            return -ENOMEM;
+    }
+
+    return -errno;
+}
+
+static int ptfs_releasedir(const char *path, struct fuse_file_info *fi)
+{
+    DIR *dirp = fi_dirp(fi);
+
+    return -1 != closedir(dirp) ? 0 : -errno;
+}
+
+static void *ptfs_init(struct fuse_conn_info *conn, struct fuse_config *conf)
+{
+    conn->want |= (conn->capable & FUSE_CAP_READDIRPLUS);
+
+#if defined(FSP_FUSE_CAP_CASE_INSENSITIVE)
+    conn->want |= (conn->capable & FSP_FUSE_CAP_CASE_INSENSITIVE);
+#endif
+
+    return fuse_get_context()->private_data;
+}
+
+static int ptfs_create(const char *path, fuse_mode_t mode, struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    int fd;
+    return -1 != (fd = open(path, fi->flags, mode)) ? (fi_setfd(fi, fd), 0) : -errno;
+}
+
+static int ptfs_utimens(const char *path, const struct fuse_timespec tv[2], struct fuse_file_info *fi)
+{
+    ptfs_impl_fullpath(path);
+
+    return -1 != utimensat(AT_FDCWD, path, tv, AT_SYMLINK_NOFOLLOW) ? 0 : -errno;
+}
+
+static struct fuse_operations ptfs_ops =
+{
+    .getattr = ptfs_getattr,
+    .mkdir = ptfs_mkdir,
+    .unlink = ptfs_unlink,
+    .rmdir = ptfs_rmdir,
+    .rename = ptfs_rename,
+    .chmod = ptfs_chmod,
+    .chown = ptfs_chown,
+    .truncate = ptfs_truncate,
+    .open = ptfs_open,
+    .read = ptfs_read,
+    .write = ptfs_write,
+    .statfs = ptfs_statfs,
+    .release = ptfs_release,
+    .fsync = ptfs_fsync,
+    .opendir = ptfs_opendir,
+    .readdir = ptfs_readdir,
+    .releasedir = ptfs_releasedir,
+    .init = ptfs_init,
+    .create = ptfs_create,
+    .utimens = ptfs_utimens,
+};
+
+static void usage(void)
+{
+    fprintf(stderr, "usage: " PROGNAME " [FUSE options] rootdir mountpoint\n");
+    exit(2);
+}
+
+int main(int argc, char *argv[])
+{
+    PTFS ptfs = { 0 };
+
+    if (3 <= argc && '-' != argv[argc - 2][0] && '-' != argv[argc - 1][0])
+    {
+        ptfs.rootdir = realpath(argv[argc - 2], 0); /* memory freed at process end */
+        argv[argc - 2] = argv[argc - 1];
+        argc--;
+    }
+
+#if defined(_WIN64) || defined(_WIN32)
+    /*
+     * When building for Windows (rather than Cygwin or POSIX OS)
+     * allow the path to be specified using the --VolumePrefix
+     * switch using the syntax \\passthrough-fuse\C$\Path. This
+     * allows us to run the file system under the WinFsp.Launcher
+     * and start it using commands like:
+     *
+     *     net use z: \\passthrough-fuse\C$\Path
+     */
+    if (0 == ptfs.rootdir)
+        for (int argi = 1; argc > argi; argi++)
+        {
+            int strncmp(const char *a, const char *b, size_t length);
+            char *strchr(const char *s, int c);
+            char *p = 0;
+
+            if (0 == strncmp("--UNC=", argv[argi], sizeof "--UNC=" - 1))
+                p = argv[argi] + sizeof "--UNC=" - 1;
+            else if (0 == strncmp("--VolumePrefix=", argv[argi], sizeof "--VolumePrefix=" - 1))
+                p = argv[argi] + sizeof "--VolumePrefix=" - 1;
+
+            if (0 != p && '\\' != p[1])
+            {
+                p = strchr(p + 1, '\\');
+                if (0 != p &&
+                    (
+                    ('A' <= p[1] && p[1] <= 'Z') ||
+                    ('a' <= p[1] && p[1] <= 'z')
+                    ) &&
+                    '$' == p[2])
+                {
+                    p[2] = ':';
+                    ptfs.rootdir = realpath(p + 1, 0); /* memory freed at process end */
+                    p[2] = '$';
+                    break;
+                }
+            }
+        }
+#endif
+
+    if (0 == ptfs.rootdir)
+        usage();
+
+    return fuse_main(argc, argv, &ptfs_ops, &ptfs);
+}
--- a/tst/passthrough-fuse3/passthrough-fuse3.sln
+++ b/tst/passthrough-fuse3/passthrough-fuse3.sln
@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "passthrough-fuse3", "passthrough-fuse3.vcxproj", "{5E99498C-D30C-48EF-A04A-7977C0305FAC}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Debug|x64.ActiveCfg = Debug|x64
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Debug|x64.Build.0 = Debug|x64
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Debug|x86.ActiveCfg = Debug|Win32
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Debug|x86.Build.0 = Debug|Win32
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Release|x64.ActiveCfg = Release|x64
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Release|x64.Build.0 = Release|x64
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Release|x86.ActiveCfg = Release|Win32
+		{5E99498C-D30C-48EF-A04A-7977C0305FAC}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/tst/passthrough-fuse3/passthrough-fuse3.vcxproj
+++ b/tst/passthrough-fuse3/passthrough-fuse3.vcxproj
@@ -0,0 +1,190 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
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+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
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+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
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+    <ProjectGuid>{5E99498C-D30C-48EF-A04A-7977C0305FAC}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>passthroughfuse3</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
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+    <CharacterSet>Unicode</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
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+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+    <OutDir>$(SolutionDir)build\$(Configuration)\</OutDir>
+    <IntDir>$(SolutionDir)build\$(ProjectName).build\$(Configuration)\$(PlatformTarget)\</IntDir>
+    <TargetName>$(ProjectName)-$(PlatformTarget)</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4996</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4996</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4996</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <AdditionalIncludeDirectories>$(MSBuildProgramFiles32)\WinFsp\inc\fuse3;$(MSBuildProgramFiles32)\WinFsp\inc</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <DisableSpecificWarnings>4996</DisableSpecificWarnings>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(MSBuildProgramFiles32)\WinFsp\lib\winfsp-$(PlatformTarget).lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <DelayLoadDLLs>winfsp-$(PlatformTarget).dll</DelayLoadDLLs>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="passthrough-fuse3.c" />
+    <ClCompile Include="winposix.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="winposix.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/tst/passthrough-fuse3/passthrough-fuse3.vcxproj.filters
+++ b/tst/passthrough-fuse3/passthrough-fuse3.vcxproj.filters
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source">
+      <UniqueIdentifier>{bfbcc136-ea14-4445-8f9b-1fa7f8aedc71}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="passthrough-fuse3.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+    <ClCompile Include="winposix.c">
+      <Filter>Source</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="winposix.h">
+      <Filter>Source</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
--- a/tst/passthrough-fuse3/winposix.c
+++ b/tst/passthrough-fuse3/winposix.c
@@ -0,0 +1,634 @@
+/**
+ * @file winposix.c
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+/*
+ * This is a very simple Windows POSIX layer. It handles all the POSIX
+ * file API's required to implement passthrough-fuse in POSIX, however
+ * the API handling is rather unsophisticated.
+ *
+ * Ways to improve it: use the FspPosix* API's to properly handle
+ * file names and security.
+ */
+
+#include <winfsp/winfsp.h>
+#include <fcntl.h>
+#include <fuse.h>
+#include "winposix.h"
+
+struct _DIR
+{
+    HANDLE h, fh;
+    struct dirent de;
+    char path[];
+};
+
+#if defined(FSP_FUSE_USE_STAT_EX)
+static inline uint32_t MapFileAttributesToFlags(UINT32 FileAttributes)
+{
+    uint32_t flags = 0;
+
+    if (FileAttributes & FILE_ATTRIBUTE_READONLY)
+        flags |= FSP_FUSE_UF_READONLY;
+    if (FileAttributes & FILE_ATTRIBUTE_HIDDEN)
+        flags |= FSP_FUSE_UF_HIDDEN;
+    if (FileAttributes & FILE_ATTRIBUTE_SYSTEM)
+        flags |= FSP_FUSE_UF_SYSTEM;
+    if (FileAttributes & FILE_ATTRIBUTE_ARCHIVE)
+        flags |= FSP_FUSE_UF_ARCHIVE;
+
+    return flags;
+}
+
+static inline UINT32 MapFlagsToFileAttributes(uint32_t flags)
+{
+    UINT32 FileAttributes = 0;
+
+    if (flags & FSP_FUSE_UF_READONLY)
+        FileAttributes |= FILE_ATTRIBUTE_READONLY;
+    if (flags & FSP_FUSE_UF_HIDDEN)
+        FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
+    if (flags & FSP_FUSE_UF_SYSTEM)
+        FileAttributes |= FILE_ATTRIBUTE_SYSTEM;
+    if (flags & FSP_FUSE_UF_ARCHIVE)
+        FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
+
+    return FileAttributes;
+}
+#endif
+
+static int maperror(int winerrno);
+
+static inline void *error0(void)
+{
+    errno = maperror(GetLastError());
+    return 0;
+}
+
+static inline int error(void)
+{
+    errno = maperror(GetLastError());
+    return -1;
+}
+
+char *realpath(const char *path, char *resolved)
+{
+    char *result;
+
+    if (0 == resolved)
+    {
+        result = malloc(PATH_MAX); /* sets errno */
+        if (0 == result)
+            return 0;
+    }
+    else
+        result = resolved;
+
+    int err = 0;
+    DWORD len = GetFullPathNameA(path, PATH_MAX, result, 0);
+    if (0 == len)
+        err = GetLastError();
+    else if (PATH_MAX < len)
+        err = ERROR_INVALID_PARAMETER;
+
+    if (0 == err)
+    {
+        HANDLE h = CreateFileA(result,
+            FILE_READ_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+            0,
+            OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+        if (INVALID_HANDLE_VALUE != h)
+            CloseHandle(h);
+        else
+            err = GetLastError();
+    }
+
+    if (0 != err)
+    {
+        if (result != resolved)
+            free(result);
+
+        errno = maperror(err);
+        result = 0;
+    }
+
+    return result;
+}
+
+int statvfs(const char *path, struct fuse_statvfs *stbuf)
+{
+    char root[PATH_MAX];
+    DWORD
+        VolumeSerialNumber,
+        MaxComponentLength,
+        SectorsPerCluster,
+        BytesPerSector,
+        NumberOfFreeClusters,
+        TotalNumberOfClusters;
+
+    if (!GetVolumePathNameA(path, root, PATH_MAX) ||
+        !GetVolumeInformationA(root, 0, 0, &VolumeSerialNumber, &MaxComponentLength, 0, 0, 0) ||
+        !GetDiskFreeSpaceA(root, &SectorsPerCluster, &BytesPerSector,
+            &NumberOfFreeClusters, &TotalNumberOfClusters))
+    {
+        return error();
+    }
+
+    memset(stbuf, 0, sizeof *stbuf);
+    stbuf->f_bsize = SectorsPerCluster * BytesPerSector;
+    stbuf->f_frsize = SectorsPerCluster * BytesPerSector;
+    stbuf->f_blocks = TotalNumberOfClusters;
+    stbuf->f_bfree = NumberOfFreeClusters;
+    stbuf->f_bavail = TotalNumberOfClusters;
+    stbuf->f_fsid = VolumeSerialNumber;
+    stbuf->f_namemax = MaxComponentLength;
+
+    return 0;
+}
+
+int open(const char *path, int oflag, ...)
+{
+    static DWORD da[] = { GENERIC_READ, GENERIC_WRITE, GENERIC_READ | GENERIC_WRITE, 0 };
+    static DWORD cd[] = { OPEN_EXISTING, OPEN_ALWAYS, TRUNCATE_EXISTING, CREATE_ALWAYS };
+    DWORD DesiredAccess = 0 == (oflag & _O_APPEND) ?
+        da[oflag & (_O_RDONLY | _O_WRONLY | _O_RDWR)] :
+        (da[oflag & (_O_RDONLY | _O_WRONLY | _O_RDWR)] & ~FILE_WRITE_DATA) | FILE_APPEND_DATA;
+    DWORD CreationDisposition = (_O_CREAT | _O_EXCL) == (oflag & (_O_CREAT | _O_EXCL)) ?
+        CREATE_NEW :
+        cd[(oflag & (_O_CREAT | _O_TRUNC)) >> 8];
+
+    HANDLE h = CreateFileA(path,
+        DesiredAccess, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0/* default security */,
+        CreationDisposition, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS, 0);
+
+    if (INVALID_HANDLE_VALUE == h)
+        return error();
+
+    return (int)(intptr_t)h;
+}
+
+int fstat(int fd, struct fuse_stat *stbuf)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+    BY_HANDLE_FILE_INFORMATION FileInfo;
+
+    if (!GetFileInformationByHandle(h, &FileInfo))
+        return error();
+
+    memset(stbuf, 0, sizeof *stbuf);
+    stbuf->st_mode = 0777 |
+        ((FileInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? 0040000/* S_IFDIR */ : 0);
+    stbuf->st_nlink = 1;
+    stbuf->st_size = ((UINT64)FileInfo.nFileSizeHigh << 32) | ((UINT64)FileInfo.nFileSizeLow);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FileInfo.ftCreationTime, (void *)&stbuf->st_birthtim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FileInfo.ftLastAccessTime, (void *)&stbuf->st_atim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FileInfo.ftLastWriteTime, (void *)&stbuf->st_mtim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FileInfo.ftLastWriteTime, (void *)&stbuf->st_ctim);
+#if defined(FSP_FUSE_USE_STAT_EX)
+    stbuf->st_flags = MapFileAttributesToFlags(FileInfo.dwFileAttributes);
+#endif
+
+    return 0;
+}
+
+int ftruncate(int fd, fuse_off_t size)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+    FILE_END_OF_FILE_INFO EndOfFileInfo;
+
+    EndOfFileInfo.EndOfFile.QuadPart = size;
+
+    if (!SetFileInformationByHandle(h, FileEndOfFileInfo, &EndOfFileInfo, sizeof EndOfFileInfo))
+        return error();
+
+    return 0;
+}
+
+int pread(int fd, void *buf, size_t nbyte, fuse_off_t offset)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+    OVERLAPPED Overlapped = { 0 };
+    DWORD BytesTransferred;
+
+    Overlapped.Offset = (DWORD)offset;
+    Overlapped.OffsetHigh = (DWORD)(offset >> 32);
+
+    if (!ReadFile(h, buf, (DWORD)nbyte, &BytesTransferred, &Overlapped))
+    {
+        if (ERROR_HANDLE_EOF == GetLastError())
+            return 0;
+        return error();
+    }
+
+    return BytesTransferred;
+}
+
+int pwrite(int fd, const void *buf, size_t nbyte, fuse_off_t offset)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+    OVERLAPPED Overlapped = { 0 };
+    DWORD BytesTransferred;
+
+    Overlapped.Offset = (DWORD)offset;
+    Overlapped.OffsetHigh = (DWORD)(offset >> 32);
+
+    if (!WriteFile(h, buf, (DWORD)nbyte, &BytesTransferred, &Overlapped))
+        return error();
+
+    return BytesTransferred;
+}
+
+int fsync(int fd)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+
+    if (!FlushFileBuffers(h))
+        return error();
+
+    return 0;
+}
+
+int close(int fd)
+{
+    HANDLE h = (HANDLE)(intptr_t)fd;
+
+    if (!CloseHandle(h))
+        return error();
+
+    return 0;
+}
+
+int lstat(const char *path, struct fuse_stat *stbuf)
+{
+    HANDLE h = CreateFileA(path,
+        FILE_READ_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0,
+        OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+    if (INVALID_HANDLE_VALUE == h)
+        return error();
+
+    int res = fstat((int)(intptr_t)h, stbuf);
+
+    CloseHandle(h);
+
+    return res;
+}
+
+int chmod(const char *path, fuse_mode_t mode)
+{
+    /* we do not support file security */
+    return 0;
+}
+
+int lchown(const char *path, fuse_uid_t uid, fuse_gid_t gid)
+{
+    /* we do not support file security */
+    return 0;
+}
+
+int lchflags(const char *path, uint32_t flags)
+{
+#if defined(FSP_FUSE_USE_STAT_EX)
+    UINT32 FileAttributes = MapFlagsToFileAttributes(flags);
+
+    if (0 == FileAttributes)
+        FileAttributes = FILE_ATTRIBUTE_NORMAL;
+
+    if (!SetFileAttributesA(path, FileAttributes))
+        return error();
+#endif
+
+    return 0;
+}
+
+int truncate(const char *path, fuse_off_t size)
+{
+    HANDLE h = CreateFileA(path,
+        FILE_WRITE_DATA, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0,
+        OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+    if (INVALID_HANDLE_VALUE == h)
+        return error();
+
+    int res = ftruncate((int)(intptr_t)h, size);
+
+    CloseHandle(h);
+
+    return res;
+}
+
+int utime(const char *path, const struct fuse_utimbuf *timbuf)
+{
+    if (0 == timbuf)
+        return utimensat(AT_FDCWD, path, 0, AT_SYMLINK_NOFOLLOW);
+    else
+    {
+        struct fuse_timespec times[2];
+        times[0].tv_sec = timbuf->actime;
+        times[0].tv_nsec = 0;
+        times[1].tv_sec = timbuf->modtime;
+        times[1].tv_nsec = 0;
+        return utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW);
+    }
+}
+
+int utimensat(int dirfd, const char *path, const struct fuse_timespec times[2], int flag)
+{
+    /* ignore dirfd and assume that it is always AT_FDCWD */
+    /* ignore flag and assume that it is always AT_SYMLINK_NOFOLLOW */
+
+    HANDLE h = CreateFileA(path,
+        FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0,
+        OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+    if (INVALID_HANDLE_VALUE == h)
+        return error();
+
+    UINT64 LastAccessTime, LastWriteTime;
+    if (0 == times)
+    {
+        FILETIME FileTime;
+        GetSystemTimeAsFileTime(&FileTime);
+        LastAccessTime = LastWriteTime = *(PUINT64)&FileTime;
+    }
+    else
+    {
+        FspPosixUnixTimeToFileTime((void *)&times[0], &LastAccessTime);
+        FspPosixUnixTimeToFileTime((void *)&times[1], &LastWriteTime);
+    }
+
+    int res = SetFileTime(h,
+        0, (PFILETIME)&LastAccessTime, (PFILETIME)&LastWriteTime) ? 0 : error();
+
+    CloseHandle(h);
+
+    return res;
+}
+
+int setcrtime(const char *path, const struct fuse_timespec *tv)
+{
+    HANDLE h = CreateFileA(path,
+        FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0,
+        OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+    if (INVALID_HANDLE_VALUE == h)
+        return error();
+
+    UINT64 CreationTime;
+    FspPosixUnixTimeToFileTime((void *)tv, &CreationTime);
+
+    int res = SetFileTime(h,
+        (PFILETIME)&CreationTime, 0, 0) ? 0 : error();
+
+    CloseHandle(h);
+
+    return res;
+}
+
+int unlink(const char *path)
+{
+    if (!DeleteFileA(path))
+        return error();
+
+    return 0;
+}
+
+int rename(const char *oldpath, const char *newpath)
+{
+    if (!MoveFileExA(oldpath, newpath, MOVEFILE_REPLACE_EXISTING))
+        return error();
+
+    return 0;
+}
+
+int mkdir(const char *path, fuse_mode_t mode)
+{
+    if (!CreateDirectoryA(path, 0/* default security */))
+        return error();
+
+    return 0;
+}
+
+int rmdir(const char *path)
+{
+    if (!RemoveDirectoryA(path))
+        return error();
+
+    return 0;
+}
+
+DIR *opendir(const char *path)
+{
+    HANDLE h = CreateFileA(path,
+        FILE_READ_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+        0,
+        OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
+    if (INVALID_HANDLE_VALUE == h)
+        return error0();
+
+    size_t pathlen = strlen(path);
+    if (0 < pathlen && '/' == path[pathlen - 1])
+        pathlen--;
+
+    DIR *dirp = malloc(sizeof *dirp + pathlen + 3); /* sets errno */
+    if (0 == dirp)
+    {
+        CloseHandle(h);
+        return 0;
+    }
+
+    memset(dirp, 0, sizeof *dirp);
+    dirp->h = h;
+    dirp->fh = INVALID_HANDLE_VALUE;
+    memcpy(dirp->path, path, pathlen);
+    dirp->path[pathlen + 0] = '/';
+    dirp->path[pathlen + 1] = '*';
+    dirp->path[pathlen + 2] = '\0';
+
+    return dirp;
+}
+
+int dirfd(DIR *dirp)
+{
+    return (int)(intptr_t)dirp->h;
+}
+
+void rewinddir(DIR *dirp)
+{
+    if (INVALID_HANDLE_VALUE != dirp->fh)
+    {
+        FindClose(dirp->fh);
+        dirp->fh = INVALID_HANDLE_VALUE;
+    }
+}
+
+struct dirent *readdir(DIR *dirp)
+{
+    WIN32_FIND_DATAA FindData;
+    struct fuse_stat *stbuf = &dirp->de.d_stat;
+
+    if (INVALID_HANDLE_VALUE == dirp->fh)
+    {
+        dirp->fh = FindFirstFileA(dirp->path, &FindData);
+        if (INVALID_HANDLE_VALUE == dirp->fh)
+            return error0();
+    }
+    else
+    {
+        if (!FindNextFileA(dirp->fh, &FindData))
+        {
+            if (ERROR_NO_MORE_FILES == GetLastError())
+                return 0;
+            return error0();
+        }
+    }
+
+    memset(stbuf, 0, sizeof *stbuf);
+    stbuf->st_mode = 0777 |
+        ((FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? 0040000/* S_IFDIR */ : 0);
+    stbuf->st_nlink = 1;
+    stbuf->st_size = ((UINT64)FindData.nFileSizeHigh << 32) | ((UINT64)FindData.nFileSizeLow);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FindData.ftCreationTime, (void *)&stbuf->st_birthtim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FindData.ftLastAccessTime, (void *)&stbuf->st_atim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FindData.ftLastWriteTime, (void *)&stbuf->st_mtim);
+    FspPosixFileTimeToUnixTime(*(PUINT64)&FindData.ftLastWriteTime, (void *)&stbuf->st_ctim);
+#if defined(FSP_FUSE_USE_STAT_EX)
+    stbuf->st_flags = MapFileAttributesToFlags(FindData.dwFileAttributes);
+#endif
+
+    strcpy(dirp->de.d_name, FindData.cFileName);
+
+    return &dirp->de;
+}
+
+int closedir(DIR *dirp)
+{
+    if (INVALID_HANDLE_VALUE != dirp->fh)
+        FindClose(dirp->fh);
+
+    CloseHandle(dirp->h);
+    free(dirp);
+
+    return 0;
+}
+
+static int maperror(int winerrno)
+{
+    switch (winerrno)
+    {
+    case ERROR_INVALID_FUNCTION:
+        return EINVAL;
+    case ERROR_FILE_NOT_FOUND:
+        return ENOENT;
+    case ERROR_PATH_NOT_FOUND:
+        return ENOENT;
+    case ERROR_TOO_MANY_OPEN_FILES:
+        return EMFILE;
+    case ERROR_ACCESS_DENIED:
+        return EACCES;
+    case ERROR_INVALID_HANDLE:
+        return EBADF;
+    case ERROR_ARENA_TRASHED:
+        return ENOMEM;
+    case ERROR_NOT_ENOUGH_MEMORY:
+        return ENOMEM;
+    case ERROR_INVALID_BLOCK:
+        return ENOMEM;
+    case ERROR_BAD_ENVIRONMENT:
+        return E2BIG;
+    case ERROR_BAD_FORMAT:
+        return ENOEXEC;
+    case ERROR_INVALID_ACCESS:
+        return EINVAL;
+    case ERROR_INVALID_DATA:
+        return EINVAL;
+    case ERROR_INVALID_DRIVE:
+        return ENOENT;
+    case ERROR_CURRENT_DIRECTORY:
+        return EACCES;
+    case ERROR_NOT_SAME_DEVICE:
+        return EXDEV;
+    case ERROR_NO_MORE_FILES:
+        return ENOENT;
+    case ERROR_LOCK_VIOLATION:
+        return EACCES;
+    case ERROR_BAD_NETPATH:
+        return ENOENT;
+    case ERROR_NETWORK_ACCESS_DENIED:
+        return EACCES;
+    case ERROR_BAD_NET_NAME:
+        return ENOENT;
+    case ERROR_FILE_EXISTS:
+        return EEXIST;
+    case ERROR_CANNOT_MAKE:
+        return EACCES;
+    case ERROR_FAIL_I24:
+        return EACCES;
+    case ERROR_INVALID_PARAMETER:
+        return EINVAL;
+    case ERROR_NO_PROC_SLOTS:
+        return EAGAIN;
+    case ERROR_DRIVE_LOCKED:
+        return EACCES;
+    case ERROR_BROKEN_PIPE:
+        return EPIPE;
+    case ERROR_DISK_FULL:
+        return ENOSPC;
+    case ERROR_INVALID_TARGET_HANDLE:
+        return EBADF;
+    case ERROR_WAIT_NO_CHILDREN:
+        return ECHILD;
+    case ERROR_CHILD_NOT_COMPLETE:
+        return ECHILD;
+    case ERROR_DIRECT_ACCESS_HANDLE:
+        return EBADF;
+    case ERROR_NEGATIVE_SEEK:
+        return EINVAL;
+    case ERROR_SEEK_ON_DEVICE:
+        return EACCES;
+    case ERROR_DIR_NOT_EMPTY:
+        return ENOTEMPTY;
+    case ERROR_NOT_LOCKED:
+        return EACCES;
+    case ERROR_BAD_PATHNAME:
+        return ENOENT;
+    case ERROR_MAX_THRDS_REACHED:
+        return EAGAIN;
+    case ERROR_LOCK_FAILED:
+        return EACCES;
+    case ERROR_ALREADY_EXISTS:
+        return EEXIST;
+    case ERROR_FILENAME_EXCED_RANGE:
+        return ENOENT;
+    case ERROR_NESTING_NOT_ALLOWED:
+        return EAGAIN;
+    case ERROR_NOT_ENOUGH_QUOTA:
+        return ENOMEM;
+    default:
+        if (ERROR_WRITE_PROTECT <= winerrno && winerrno <= ERROR_SHARING_BUFFER_EXCEEDED)
+            return EACCES;
+        else if (ERROR_INVALID_STARTING_CODESEG <= winerrno && winerrno <= ERROR_INFLOOP_IN_RELOC_CHAIN)
+            return ENOEXEC;
+        else
+            return EINVAL;
+    }
+}
+
+long WinFspLoad(void)
+{
+    return FspLoad(0);
+}
--- a/tst/passthrough-fuse3/winposix.h
+++ b/tst/passthrough-fuse3/winposix.h
@@ -0,0 +1,77 @@
+/**
+ * @file winposix.h
+ *
+ * @copyright 2015-2018 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 file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#ifndef WINPOSIX_H_INCLUDED
+#define WINPOSIX_H_INCLUDED
+
+#define O_RDONLY                        _O_RDONLY
+#define O_WRONLY                        _O_WRONLY
+#define O_RDWR                          _O_RDWR
+#define O_APPEND                        _O_APPEND
+#define O_CREAT                         _O_CREAT
+#define O_EXCL                          _O_EXCL
+#define O_TRUNC                         _O_TRUNC
+
+#define PATH_MAX                        1024
+#define AT_FDCWD                        -2
+#define AT_SYMLINK_NOFOLLOW             2
+
+typedef struct _DIR DIR;
+struct dirent
+{
+    struct fuse_stat d_stat;
+    char d_name[255];
+};
+
+char *realpath(const char *path, char *resolved);
+
+int statvfs(const char *path, struct fuse_statvfs *stbuf);
+
+int open(const char *path, int oflag, ...);
+int fstat(int fd, struct fuse_stat *stbuf);
+int ftruncate(int fd, fuse_off_t size);
+int pread(int fd, void *buf, size_t nbyte, fuse_off_t offset);
+int pwrite(int fd, const void *buf, size_t nbyte, fuse_off_t offset);
+int fsync(int fd);
+int close(int fd);
+
+int lstat(const char *path, struct fuse_stat *stbuf);
+int chmod(const char *path, fuse_mode_t mode);
+int lchown(const char *path, fuse_uid_t uid, fuse_gid_t gid);
+int lchflags(const char *path, uint32_t flags);
+int truncate(const char *path, fuse_off_t size);
+int utime(const char *path, const struct fuse_utimbuf *timbuf);
+int utimensat(int dirfd, const char *path, const struct fuse_timespec times[2], int flag);
+int setcrtime(const char *path, const struct fuse_timespec *tv);
+int unlink(const char *path);
+int rename(const char *oldpath, const char *newpath);
+
+int mkdir(const char *path, fuse_mode_t mode);
+int rmdir(const char *path);
+
+DIR *opendir(const char *path);
+int dirfd(DIR *dirp);
+void rewinddir(DIR *dirp);
+struct dirent *readdir(DIR *dirp);
+int closedir(DIR *dirp);
+
+long WinFspLoad(void);
+#undef fuse_main
+#define fuse_main(argc, argv, ops, data)\
+    (WinFspLoad(), fuse_main_real(argc, argv, ops, sizeof *(ops), data))
+
+#endif