WinFsp 2024 Beta2

CHANGES SINCE WINFSP 2023

• [FIX] Fixes a rare BSOD on recent versions of Windows. See commit a482183 for details.

• [FIX] Fixes a rare problem when using NtCreateFile to perform relative opens on a network drive (see GitHub issue #561).

• [FIX] Fixes a racing issue with two processes competing to start the FSD discovered during testing.

BUILD HASHES (SHA256)

• winfsp-2.1.24255.msi: 5F05856A75E89C244A9D845E9A8B426052A33D26E65874277CE8871FEC7073D6
• winfsp-tests-2.1.24255.zip: 370EED8129CD6854C6278575F04C3B91D248E1CFA362DD795152EE10F005978C

WinFsp 2024 Beta1

CHANGES SINCE WINFSP 2023

• [FIX] Fixes a rare BSOD on recent versions of Windows. See commit a482183 for details.

• [FIX] Fixes a racing issue with two processes competing to start the FSD discovered during testing.

BUILD HASHES (SHA256)

• winfsp-2.1.24051.msi: 1A9C5122C53EE376CDCF9A69F9B0C5D3B297A499105ACC39A50C704F8E80268E
• winfsp-tests-2.1.24051.zip: 6438C4A7C14AEC2C010EB1EA52C84C4232DD12A9B68763E3EBE6D1134147E903

WinFsp 2023

CHANGES SINCE WINFSP 2022.2

This release is a major version change for WinFsp (from 1.x to 2.x). There are no backwards incompatible API changes in this release, but nevertheless enough things change that warrant a version change.

The major new feature of this release is that it allows uninstallation and reinstallation of WinFsp without reboot. Going forward installers named winfsp-2.x.y.msi can be uninstalled and reinstalled without reboot. Furthermore a later version winfsp-2.x.y.msi installer can be used to upgrade over an earlier version winfsp-2.x.y.msi installer. However note that a winfsp-2.x.y.msi installer cannot be used to upgrade over a legacy winfsp-1.x.y.msi installer; you will still need to uninstall the old winfsp-1.x.y.msi installer, potentially reboot and then install the new winfsp-2.x.y.msi installer.

Changes visible to file system developers are listed below:

• WinFsp executable files are now installed by default in the directory C:\Program Files (x86)\WinFsp\SxS\sxs.<InstanceID>\bin. The previous directory C:\Program Files (x86)\WinFsp\bin is now a junction that points to the above directory.

• The WinFsp driver name is no longer winfsp, but rather a name such as winfsp+<InstanceID>. This means that managing the driver using the sc.exe utility is no longer as easy.

• The fsptool utility has been updated with new commands lsdrv, load, unload and ver. The lsdrv, load and unload commands can be used to manage the driver from the command line. This is rarely necessary, but may be useful for troubleshooting purposes.

• Prior to this release the WinFsp driver would never unmount a file system volume unless the user mode file system requested the unmount. From this release onward it is possible for the WinFsp driver to unmount a file system volume, without a user mode file system request. This is to allow for the driver to be unloaded.

  A new operation DispatcherStopped has been added to FSP_FILE_SYSTEM_INTERFACE, which is sent after the file system volume has been unmounted and the file system dispatcher has been stopped. This can happen because of a user mode file system request via FspFileSystemStopDispatcher or because of driver unload. The DispatcherStopped operation includes a Normally parameter, which is TRUE for normal file system shutdown via FspFileSystemStopDispatcher and FALSE otherwise.

  Native file systems that use the FspService infrastructure can use the FspFileSystemStopServiceIfNecessary API to handle the DispatcherStopped operation (see the MEMFS and NTPTFS samples). FUSE file systems get this functionality for free. .NET file systems that use the Service class infrastructure also get this functionality for free.

• WinFsp now offers a .NET library that targets .NET Framework 3.5 (as before) and one that targets .NET Standard 2.0. This is due to work by @Noire001 in PR #451.

  • There is now a winfsp.net nuget package at https://www.nuget.org/packages/winfsp.net

• FUSE now supports path components up to 255 characters long (previously it was 255 bytes). This is due to work by @zeho11 in PR #474.

  • The FUSE passthrough file systems have been updated to support long paths. This is also due to work by @zeho11.

• In some rare circumstances WinFsp file systems could report duplicate directory entries. This problem has been fixed. (GitHub issue #475.)

• The WinFsp symbols directory has been removed. If you are looking for WinFsp symbols you can find them at https://github.com/winfsp/winfsp.sym

BUILD HASHES (SHA256)

• winfsp-2.0.23075.msi: 6324DC81194A6A08F97B6AECA303CF5C2325C53EDE153BAE9FC4378F0838C101
• winfsp-tests-2.0.23075.zip: AEECDAC2BE9684C4FF9D977C41853B0DE9E065C230DBA755E86C3F8130BBC816

WinFsp 2023 RC1

CHANGES SINCE WINFSP 2022.2

This release is a major version change for WinFsp (from 1.x to 2.x). There are no backwards incompatible API changes in this release, but nevertheless enough things change that warrant a version change.

The major new feature of this release is that it allows uninstallation and reinstallation of WinFsp without reboot. Going forward installers named winfsp-2.x.y.msi can be uninstalled and reinstalled without reboot. Furthermore a later version winfsp-2.x.y.msi installer can be used to upgrade over an earlier version winfsp-2.x.y.msi installer. However note that a winfsp-2.x.y.msi installer cannot be used to upgrade over a legacy winfsp-1.x.y.msi installer; you will still need to uninstall the old winfsp-1.x.y.msi installer, potentially reboot and then install the new winfsp-2.x.y.msi installer.

Changes visible to file system developers are listed below:

• WinFsp executable files are now installed by default in the directory C:\Program Files (x86)\WinFsp\SxS\sxs.<InstanceID>\bin. The previous directory C:\Program Files (x86)\WinFsp\bin is now a junction that points to the above directory.

• The WinFsp driver name is no longer winfsp, but rather a name such as winfsp+<InstanceID>. This means that managing the driver using the sc.exe utility is no longer as easy.

• The fsptool utility has been updated with new commands lsdrv, load, unload and ver. The lsdrv, load and unload commands can be used to manage the driver from the command line. This is rarely necessary, but may be useful for troubleshooting purposes.

• Prior to this release the WinFsp driver would never unmount a file system volume unless the user mode file system requested the unmount. From this release onward it is possible for the WinFsp driver to unmount a file system volume, without a user mode file system request. This is to allow for the driver to be unloaded.

  A new operation DispatcherStopped has been added to FSP_FILE_SYSTEM_INTERFACE, which is sent after the file system volume has been unmounted and the file system dispatcher has been stopped. This can happen because of a user mode file system request via FspFileSystemStopDispatcher or because of driver unload. The DispatcherStopped operation includes a Normally parameter, which is TRUE for normal file system shutdown via FspFileSystemStopDispatcher and FALSE otherwise.

  Native file systems that use the FspService infrastructure can use the FspFileSystemStopServiceIfNecessary API to handle the DispatcherStopped operation (see the MEMFS and NTPTFS samples). FUSE file systems get this functionality for free. .NET file systems that use the Service class infrastructure also get this functionality for free.

• WinFsp now offers a .NET library that targets .NET Framework 3.5 (as before) and one that targets .NET Standard 2.0. This is due to work by @Noire001 in PR #451.

  • There is now a winfsp.net nuget package at https://www.nuget.org/packages/winfsp.net

• FUSE now supports path components up to 255 characters long (previously it was 255 bytes). This is due to work by @zeho11 in PR #474.

  • The FUSE passthrough file systems have been updated to support long paths. This is also due to work by @zeho11.

• In some rare circumstances WinFsp file systems could report duplicate directory entries. This problem has been fixed. (GitHub issue #475.)

• The WinFsp symbols directory has been removed. If you are looking for WinFsp symbols you can find them at https://github.com/winfsp/winfsp.sym

BUILD HASHES (SHA256)

• winfsp-2.0.23055.msi: 7AB21329F49B4C057FC7C66876D2B502734E37C9BB0AD360DE9E8B3B9170971F
• winfsp-tests-2.0.23055.zip: 74B39EF9B2BA8D96D69CB99AB786904EB83EB7DB38F245CDAED0E92755A42EBE

WinFsp 2023 Beta2

CHANGES SINCE WINFSP 2022.2

This release is a major version change for WinFsp (from 1.x to 2.x). There are no backwards incompatible API changes in this release, but nevertheless enough things change that warrant a version change.

The major new feature of this release is that it allows uninstallation and reinstallation of WinFsp without reboot. Going forward installers named winfsp-2.x.y.msi can be uninstalled and reinstalled without reboot. Furthermore a later version winfsp-2.x.y.msi installer can be used to upgrade over an earlier version winfsp-2.x.y.msi installer. However note that a winfsp-2.x.y.msi installer cannot be used to upgrade over a legacy winfsp-1.x.y.msi installer; you will still need to uninstall the old winfsp-1.x.y.msi installer, potentially reboot and then install the new winfsp-2.x.y.msi installer.

Changes visible to file system developers are listed below:

• WinFsp executable files are now installed by default in the directory C:\Program Files (x86)\WinFsp\SxS\sxs.<InstanceID>\bin. The previous directory C:\Program Files (x86)\WinFsp\bin is now a junction that points to the above directory.

• The WinFsp driver name is no longer winfsp, but rather a name such as winfsp+<InstanceID>. This means that managing the driver using the sc.exe utility is no longer as easy.

• The fsptool utility has been updated with new commands lsdrv, load, unload and ver. The lsdrv, load and unload commands can be used to manage the driver from the command line. This is rarely necessary, but may be useful for troubleshooting purposes.

• Prior to this release the WinFsp driver would never unmount a file system volume unless the user mode file system requested the unmount. From this release onward it is possible for the WinFsp driver to unmount a file system volume, without a user mode file system request. This is to allow for the driver to be unloaded.

  A new operation DispatcherStopped has been added to FSP_FILE_SYSTEM_INTERFACE, which is sent after the file system volume has been unmounted and the file system dispatcher has been stopped. This can happen because of a user mode file system request via FspFileSystemStopDispatcher or because of driver unload. The DispatcherStopped operation includes a Normally parameter, which is TRUE for normal file system shutdown via FspFileSystemStopDispatcher and FALSE otherwise.

  Native file systems that use the FspService infrastructure can use the FspFileSystemStopServiceIfNecessary API to handle the DispatcherStopped operation (see the MEMFS and NTPTFS samples). FUSE file systems get this functionality for free. .NET file systems that use the Service class infrastructure also get this functionality for free.

• WinFsp now offers a .NET library that targets .NET Framework 3.5 (as before) and one that targets .NET Standard 2.0. This is due to work by @Noire001 in PR #451.

  • There is now a winfsp.net nuget package at https://www.nuget.org/packages/winfsp.net

• FUSE now supports path components up to 255 characters long (previously it was 255 bytes). This is due to work by @zeho11 in PR #474.

  • The FUSE passthrough file systems have been updated to support long paths. This is also due to work by @zeho11.

• The WinFsp symbols directory has been removed. If you are looking for WinFsp symbols you can find them at https://github.com/winfsp/winfsp.sym

BUILD HASHES (SHA256)

• winfsp-2.0.23033.msi: BF3595765FF179B6664600B0065CD77C89823A3803C55CBD35EE4E014141F16C
• winfsp-tests-2.0.23033.zip: 4A5B1B4F7AC93C91C6A0ADF08DF3CB1BF60AC88DE7EB23470DF89670AAF79BF1

WinFsp 2022.2 Update1

CHANGES SINCE WINFSP 2022+ARM64

Note: This release (2022.2 Update1) is the same as the previous release (2022.2) except that: (1) the kernel-mode drivers are now digitally signed only with the Microsoft Attestation signature, and that: (2) no release assets are digitally signed with SHA-1. (This change was necessary to fix a problem in older versions of Windows such as Windows 7.)

• [NEW] WinFsp now supports mounting as directory using the Mount Manager. Use the syntax \\.\C:\Path\To\Mount\Directory.

• [NEW] A new registry setting MountUseMountmgrFromFSD has been added. See WinFsp Registry Settings for details.

• [FIX] A problem with Windows containers has been fixed. (GitHub issue #438.)

• [FIX] File systems can now be mounted as directories on ARM64. (GitHub issue #448.)

• [FIX] The passthrough file system now reports correct IndexNumber. (GitHub issue #325.)

• [BUILD] Product configuration for the relative paths to the File System Driver, Network Provider and EventLog is now possible via the file build.version.props located in build\VStudio.

WinFsp 2023 Beta1

CHANGES SINCE WINFSP 2022.2

This release is a major version change for WinFsp (from 1.x to 2.x). There are no backwards incompatible API changes in this release, but nevertheless enough things change that warrant a version change.

The major new feature of this release is that it allows uninstallation and reinstallation of WinFsp without reboot. Going forward installers named winfsp-2.x.y.msi can be uninstalled and reinstalled without reboot. Furthermore a later version winfsp-2.x.y.msi installer can be used to upgrade over an earlier version winfsp-2.x.y.msi installer. However note that a winfsp-2.x.y.msi installer cannot be used to upgrade over a legacy winfsp-1.x.y.msi installer; you will still need to uninstall the old winfsp-1.x.y.msi installer, potentially reboot and then install the new winfsp-2.x.y.msi installer.

Some changes that may be visible to file system developers are listed below:

• WinFsp executable files are now installed by default in the directory C:\Program Files (x86)\WinFsp\SxS\sxs.<InstanceID>\bin. The previous directory C:\Program Files (x86)\WinFsp\bin is now a junction that points to the above directory.

• The WinFsp driver name is no longer winfsp, but rather a name such as winfsp+<InstanceID>. This means that managing the driver using the sc.exe utility is no longer as easy.

• The fsptool utility has been updated with new commands lsdrv, load, unload and ver. The lsdrv, load and unload commands can be used to manage the driver from the command line. This is rarely necessary, but may be useful for troubleshooting purposes.

• The WinFsp symbols directory has been removed. If you are looking for WinFsp symbols you can find them at https://github.com/winfsp/winfsp.sym

This release introduces significant internal changes, including kernel mode changes to enable the driver to be unloaded. Although there are no known crashes or other problems of such severity, please do not use in production environments.

WinFsp 2022.2

VirusTotal Scan Results

CHANGES SINCE WINFSP 2022+ARM64

• [NEW] WinFsp now supports mounting as directory using the Mount Manager. Use the syntax \\.\C:\Path\To\Mount\Directory.

• [NEW] A new registry setting MountUseMountmgrFromFSD has been added. See WinFsp Registry Settings for details.

• [FIX] A problem with Windows containers has been fixed. (GitHub issue #438.)

• [FIX] File systems can now be mounted as directories on ARM64. (GitHub issue #448.)

• [FIX] The passthrough file system now reports correct IndexNumber. (GitHub issue #325.)

• [BUILD] Product configuration for the relative paths to the File System Driver, Network Provider and EventLog is now possible via the file build.version.props located in build\VStudio.

WinFsp 2022.2 Beta2

VirusTotal Scan Results

CHANGES SINCE WINFSP 2022+ARM64

• [NEW] WinFsp now supports mounting as directory using the Mount Manager. Use the syntax \\.\C:\Path\To\Mount\Directory.

• [NEW] A new registry setting MountUseMountmgrFromFSD has been added. See WinFsp Registry Settings for details.

• [FIX] A problem with Windows containers has been fixed. (GitHub issue #438.)

• [FIX] File systems can now be mounted as directories on ARM64. (GitHub issue #448.)

• [FIX] The passthrough file system now reports correct IndexNumber. (GitHub issue #325.)

• [BUILD] Product configuration for the relative paths to the File System Driver, Network Provider and EventLog is now possible via the file build.version.props located in build\VStudio.

WinFsp 2022.2 Beta1

VirusTotal Scan Results

CHANGES SINCE WINFSP 2022+ARM64

• [NEW] A new registry setting MountUseMountmgrFromFSD has been added. See WinFsp Registry Settings for details.

• [BUILD] Product configuration for the relative paths to the File System Driver, Network Provider and EventLog is now possible via the file build.version.props located in build\VStudio.