Re: FreeBSD 16 nfsd: Unexpected NFS error 'NFS4ERR_NOFILEHANDLE' while probing named attr support

On Sun, Apr 12, 2026 at 3:58 PM Dan Shelton <[email protected]> wrote:
>
> On Wed, 11 Mar 2026 at 01:13, Rick Macklem <[email protected]> wrote:
> >
> > On Tue, Mar 10, 2026 at 3:40 PM Dan Shelton <[email protected]> wrote:
> > >
> > > Hello,
> > >
> > > some odd issue with ms-nfs41-client: when connecting to a FreeBSD
> > > 16.0-CURRENT main-n284403-895a97c875a0 (installed from
> > > FreeBSD-16.0-CURRENT-amd64-20260224-16822dac32ab-284159-disc1.iso) NFS server:
> > >
> > > Windows side:
> > > $ /sbin/nfs_mount -o rw 'F:' 'nfs://42.28.16.228//nfsdata'
> > > Successfully mounted '42.28.16.228@NFS@2049' to drive 'F:'
> > >
> > > ms-nfs41-client prints this warning:
> > > 204c: nfs41_superblock_getattr: Unexpected NFS error
> > > 'NFS4ERR_NOFILEHANDLE' while probing named attr support
> > > (the warning comes from
> > > https://github.com/kofemann/ms-nfs41-client/blob/master/daemon/nfs41_ops.c#L1394)
> > Hmm. The most obvious cause would be that the file system is not exported.
> > Check the /etc/exports and, if you use the ZFS nfshare property,
> > /etc/zfs/exports
> > and make sure the file system is exported?
> >
> > As I've already mentioned, a packet capture is what I use to figure out
> > what is going on. On the FreeBSD server..
> > # tcpdump -s 0 -w out.pcap host <windows-client>
> > - For a simple failure like the above, start it before doing the mount
> >   and then kill it after the failure and send me "out.pcap".
> >   (If there is going to be stuff in out.pcap that you need to keep
> >    confidential, then you'll need to look at out.pcap yourself in wireshare.)
>
> We hit this bloody problem several times in February and March.
> Workaround was to reboot until FILE_NAMED_STREAMS was reported.
I'll admit I have no idea what you mean by this?

>
> What is the preferred tool to make a package capture on FreeBSD?
(Assuming you meant packet capture..)

# tcpdump -s 0 -w out.pcap host <nfs-client-host>

rick

>
> Dan
> --
> Dan Shelton - Cluster Specialist Win/Lin/Bsd
>