winfsp/winfsp v1.5

WinFsp 2019.3

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CHANGES SINCE 2019.2

• This release supports the new WinFuse kernel driver!
• [GEN] WinFsp file systems can now be used by WSLinux. File systems must enable this support by setting the FSP_FSCTL_VOLUME_PARAMS::WslFeatures bit. Use the command sudo mount -t drvfs x: /mnt/x to mount.
• [GEN] Extended attribute support has been added for all WinFsp API's: native, .NET, FUSE2 and FUSE3.
• [GEN] Mount Manager support has been added and it works for current and new file systems:
  • If the file system mountpoint is in the syntax \\.\X: then the Mount Manager is used.
  • If the file system mountpoint is in the syntax X: then DefineDosDeviceW is used (i.e. same as today).
  • If the file system mountpoint is in the syntax X:\DIR then a reparse point is used and the file system is mounted as a directory (i.e. same as today).
  • Caveats:
    • It requires Administrator access. This is because opening the \\.\MountPointManager device requires Administrator access.
    • It currently works with drives (\\.\X:) but not directories (\\.\X:\DIR).
    • Mount Manager drives created by WinFsp are transient. WinFsp takes various steps to ensure that this is the case.
    • Mount Manager drives are global and are visible across Terminal Services sessions (they go into the \GLOBAL?? portion of the NT namespace).
• [FSD] Support for kernel-mode file systems on top of WinFsp has been added. See FspFsextProvider. This is in preparation for WinFuse - FUSE for Windows and WSLinux.
• [FSD] FastIO support has been added. FastIO operations are enabled on cache-enabled file systems with the notable exception of FastIoQueryOpen, which allows opening files in kernel mode; this operation requires the file system to specify the FSP_FSCTL_VOLUME_PARAMS::AllowOpenInKernelMode flag.
• [FSD] Support for FileFsSectorSizeInformation and IOCTL_STORAGE_QUERY_PROPERTY / StorageAccessAlignmentProperty has been added.
• [DLL] The FspFileSystemStartDispatcher default number of threads (ThreadCount==0) has been changed. See commit 3902874 for more.
• [FUSE] FUSE has new -o UserName=DOMAIN+USERNAME and -o GroupName=DOMAIN+GROUPNAME options. These function like the -o uid=UID and -o gid=GID options, but accept Windows user and groups names.
• [FUSE] FUSE has new -o dothidden option that is used to add the Windows hidden file attribute to files that start with a dot.
• [FUSE] FUSE has new -o create_file_umask=nnn and -o create_dir_umask=nnn options that allow for more control than the -o create_umask=nnn option.
• [FUSE] FUSE has new --ExactFileSystemName=FSNAME option that removes the "FUSE-" prefix from the file system name. (Use with caution: see discussion in PR #251.) (Thanks @johntyner.)
• [.NET] The .NET API now supports asynchronous handling of Read, Write and ReadDirectory. (Thanks @dworkin.)
• [.NET] The .NET API now supports fine-grained timeouts (VolumeInfoTimeout, DirInfoTimeout, etc).
• [.NET] The .NET API has new method FileSystemHost.MountEx that adds a ThreadCount parameter.
• [LAUNCH] The Launcher can now rewrite path arguments passed to file systems during launching using "Path Transformation Language". See commit a73f1b9 for more.
• [MEMFS] A new memfs FUSE3 file system written in C++ has been added. See tst/memfs-fuse3.
• [AIRFS] John Oberschelp has done some fantastic work adding persistence to the airfs file system. (Thanks @JohnOberschelp.)
• [FIX] Fixes for very large (> 4GiB) files. (Thanks @dworkin.)
• [FIX] A fix for how FUSE handles the return value from opendir. (GitHub issue winfsp/sshfs-win#54)
• [FIX] A fix for an invalid UID to SID mapping on domains with a lot of users. (Thanks @sganis.)
• [FIX] A fix on the C++ layer. (Thanks @colatkinson.)
• Other fixes and improvements.