Fwd: [Ms-nfs41-client-devel] [Announcement] NFSv4.2/NFSv4.1 filesystem client Windows driver binaries for Windows 10/11+WindowsServer 2019/2022/2025 for testing, 2026-03-14 ...

Sun Mar 15 10:52:00 GMT 2026

Good morning!

For your consideration - we need feedback, please!

New is:
- 4th spring release
- ReactOS now compiles on a NFSv4.1 filesystem, and can be started in
a VMware VM directly from a NFSv4.1/4.2 filesystem
- Support for Win32 named streams/Alternate Data Streams (ADS), if the
NFSv4.x server supports NFS named attributes (e.g. Solaris >= 11.4,
Illumos, FreeBSD >= 15.0, ...)
- New winstreamsutil.exe utility to find, create, rename, delete, cat,
etc Win32 named streams
- Now supports case-insensitive NFSv4.x filesystems (useful for
software installations, using Windows user profile dir, compiling
Windows software, ...)
- Copy acceleration (Win32 read/write offload) via server-side NFSv4.2
COPY for copy, xcopy, Windows Explorer, ...,  works even if the
exported filesystem does not support block cloning
- New tool to manage machine-wide mounts for all logons/services:
/sbin/nfs_globalmount.exe
- Better FreeBSD NFS server compatibility
- Volume label is now an URL to the NFS server, e.g. nfs://hostname/
- winsg.exe now supports PowerShell directly- The NFS driver and
wings.exe now support non-ASCII characters (e.g french circumflex)
- Sparse file support (https://en.wikipedia.org/wiki/Sparse_file) for
HPC environments
- Symlink conversion, to make Windows symlinks exchangeable with other
NFS clients on other platforms
- MSYS2 support

Ced

---------- Forwarded message ---------
From: Roland Mainz <roland.mainz@nrubsig.org>
Date: Sat, 14 Mar 2026 at 19:18
Subject: [Ms-nfs41-client-devel] [Announcement] NFSv4.2/NFSv4.1
filesystem client Windows driver binaries for Windows
10/11+WindowsServer 2019/2022/2025 for testing, 2026-03-14 ...
To: <ms-nfs41-client-devel@lists.sourceforge.net>

Hi!

----

We've created a set of test binaries for the NFSv4.2/NFSv4.1
filesystem client driver for Windows 10 (32bit x86, x86-64, ARM64),
Windows 11 (x86-64, ARM64)+Windows Server 2019/2022/2025 (x86-64,
ARM64), based on https://github.com/kofemann/ms-nfs41-client (commit
id #5ce53d1d6736581324ba4f0e444d34ce8b969cee, git bundle in tarball),
for testing and feedback.

** FULL release readme:
http://www.nrubsig.org/people/gisburn/work/msnfs41client/releases/testing/msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.html
http://www.nrubsig.org/people/gisburn/work/msnfs41client/releases/testing/msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.readme

** Download URL (all architectures+platforms):
http://www.nrubsig.org/people/gisburn/work/msnfs41client/releases/testing/msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.tar.bz2

** Download hash sums:
SHA2-256(msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.html)=
e0c5d27a7ebd8bcb007a61dadaa77a5b7545fa2733251b10078f8e6e70720ef6
SHA2-256(msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.readme)=
cb9c58c14a5b7a13edf0b51312f5c1d37c35889e3ba1cf02ad5609e5b234d4aa
SHA2-256(msnfs41client_cygwin_64bit32bit_binaries_20260314_17h22m_git5ce53d1.tar.bz2)=
c8fdcb3552329c078dcf0111357720c628c0a7fdce582f13a219d5631c1fd0fc

** Major changes since the last release:
- Added support for FreeBSD 16.0 NFS server
- More fixes for case-insensitive NFS filesystems (requires FreeBSD
n>= 16.0 NFS server, Linux >= 7.1 NFS server or Windows Server NFS
server with a case-insensitive filesystem)
- Fixed |FileRenameInformation|/|FileLinkInformation| SRVOpen
collapsing support when files are being replaced.
- Bugfixes to enable compilation of ReactOS on a NFSv4.1 filesystem
- Support for Win32 named streams/Alternate Data Streams (ADS), if the
NFSv4.x server supports NFS named attributes (e.g. Solaris >= 11.4,
Illumos, FreeBSD >= 15.0, ...), including NTFS-style renaming support.
This also includes new utilities (e.g. winstreamsutil.exe) to find,
list, create, rename, delete etc. Win32 named streams
- Support for Windows "SRVOpen collapsing", which enables file handles
with the access/permission/etc attributes to share one NFS file handle
(saving open/close round trips to the NFS server)
- Symlinks are now using the group defined by Win32 PrimaryGroup
(which can be set via Cygwin newgrp(1)/|setgid()| or winsg(1))
- Added a new standalone tool called catdbgprint.exe which can be used
to listen to Windows kernel |DbgPrint()| debug messages (DbgView.exe
from Windows Internals still works, but this avoids installing an
extra tool)
- Added support for Windows "Extended Create Parameters" |ECP
QUERY_ON_CREATE| |QoCFileStatInformation| and |QoCFileLxInformation|
- Added support for setting a file's ACL at file creation time
- Bugfixes for FreeBSD NFS server
- Fixed issues probing sparse files when using the nfs-ganesha NFS server
- Disk and CDROM/DVD images can now be mounted via
https://github.com/gisburn/filedisk-sparse/
- UNC path format changed to <hostname>@<protocol>@<port>, e.g.
ournfsserver@NFS@2049, to support future transport+mount options (e.g.
RDMA , TLS/SSL etc.)
- Window 11/ARM64 is now supported (native aarch64 kernel module and
nfs*.exe userland utilities)
- /sbin/nfs_globalmount, a new tool for Administrators to manage
global/machine-wide mounts which are available to all Windows
users/services/logons
- New "nfsclientdctl" utility to change the NFS client daemon
parameters at runtime
- support for case-insensitive filesystems (e.g. Windows Server NTFS)
- NFS referrals now work with custom (non-TCP/2049) port numbers
- Implemented |FSCTL_OFFLOAD_READ|+|FSCTL_OFFLOAD_WRITE| (e.g. used by
Windows 10 xcopy, Windows Explorer etc) for server-side NFSv4.2 COPY
- Better FreeBSD 14.x/15.0 nfsd compatibility
- More software tested for compatibility: MariaDB, Microsoft Office
2016, Visual Studio 2022 work with msnfs41client
- Volume label is now the nfs://-URL to the server (up to 31
characters for Windows Explorer compatibility)
- Support for user and group names with non-ASCII (e.g. Unicode) names
(like German umlauts) in ms-nfs41-client, winsg.exe etc.
- winsg.exe now has a /P option to run powershell.exe with the requested group
- nfs_mount.exe now enforces that normal mounts need nfs://-URLs with
absolute paths, and "public NFS" mounts need relative paths in a
nfs://-URL
- sec=none support
- Improved /sbin/cygwinaccount2nfs4account script to better handle
creation of Windows Domain accounts on the NFS server side
- *.(exe|dll) executables are now signed with a WDK test signature,
helping with *rare* cases that Windows Defender with paranoid settings
wrongly recognising the binaries as potential threads. A *.cer
certificate file is supplied which can be imported into the Windows
Defender to whitelist the binaries if this happens.
- Support for |FSCTL_DUPLICATE_EXTENTS_TO_FILE|, which allows Windows
11 applications which use |CopyFile2()| (like cmd.exe  copy, xcopy.exe
etc) to copy files via block cloning. Requires NFSv4.2 NFS server with
{ CLONE, SEEK, DEALLOCATE } support, exporting a filesystem which
supports block cloning (e.g. btrfs, xfs). This includes correct
cloning of sparse files.
- Sparse file support (requires NFSv4.2 server { SEEK, ALLOCATE,
DEALLOCATE } and the |FATTR4_WORD1_SPACE_USED| attr), including
hole/data range enumeration, punching holes etc., e.g. $ fsutil sparse
queryrange mysparsefile # and Win32 named stream support
- Improved Windows Extended Attribute (EA) support (requires NFS named
attributes support in the NFS server (e.g. Solaris >= 11.4, Illumos,
FreeBSD >= 15.0, ...)), including create/read/write/delete
- Support for Storage32-API (e.g. enables use of *.msi installer files
on NFS filesystems)
- Cygwin /usr/bin/svn and Windows '/cygdrive/c/Program
Files/Git/cmd/git' now work
- Illumos NFSv4.2+Solaris 11.4 NFSv4.1 server is now supported
- Windows Server 2022 NFSv4.1 server is now supported (compared to
WS2019 this NFS server version has ACL support)

** Please send comments, bugs, test reports, complaints etc. to the
MailMan mailing list at
https://sourceforge.net/projects/ms-nfs41-client/lists/ms-nfs41-client-devel

----

Bye,
Roland
--
  __ .  . __
 (o.\ \/ /.o) roland.mainz@nrubsig.org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

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