Re: zfs sharenfs woes

On Tue, Jul 22, 2025 at 7:37 AM Rick Macklem <rick.macklem@gmail.com> wrote:
>
> On Tue, Jul 22, 2025 at 7:06 AM void <void@f-m.fm> wrote:
> >
> > On Tue, Jul 22, 2025 at 06:16:36AM -0700, Rick Macklem wrote:
> > >On Tue, Jul 22, 2025 at 6:10 AM void <void@f-m.fm> wrote:
> > >>
> > >> I have a problem getting sharenfs working. showmount -e displays an empty list.
> > >>
> > >> On the server (15-current-n278914) 192.168.1.102
> > >>
> > >> /etc/rc.conf :
> > >> # NFS
> > >> rpcbind_enable="YES"
> > >> nfs_server_enable="YES"
> > >> mountd_enable="YES"
> > >>
> > >> # zfs get sharenfs data/testnfs
> > >>
> > >> data/testnfs  sharenfs  maproot=root -alldirs -network 192.168.1.100/32 local
> > >>
> > >> in /etc/zfs/exports :
> > >>
> > >> /data/testnfs   -maproot=root -alldirs -network 192.168.1.100/32
> >
> > >I would have expressed exporting to a single client by just specifying
> > >"192.168.1.100" instead of "-network 192.168.1.100/32", but I'm not
> > >sure if what you did is a problem?
> >
> > I'm not sure either. If I change it to 192.168.1.100 is it still prefixed
> > by "-network" ?
> No, but you seemed to try it and it didn't help.
> If it worked before, it should still work.
>
> I cannot see any reason why it would not work?
Oh, and another thing to try is doing "df" and seeing that
/data/testnfs shows up in the list. Exports are handled in
"generic code" above the VOP layer, so it needs to be in
the mount list and "df" should show the entries in that mount list.

rick

>
> >
> > It did work before - all this is subsequent to upgrading to main-stabweek-2025-Jul
> > so at this stage I'm unsure if it's something in the upgrade that's a problem or
> > something has changed that I've not accounted for.
> >
> > >Did you look in /var/log/messages to see if mountd reports any error?
> > >(Such as not liking 192.168.1.100/32 above.)
> >
> > mountd[97329]: mount request denied from 192.168.1.100 for /data/testnfs
> Expected if it is not exported.
>
> However, mountd should throw out a message when an exports line fails.
> Try doing "service mountd reload" and then see if that has generated any
> message in /var/log/messages.
>
> rick
>
> >
> > On the client,
> >
> > % doas mount -t nfs 192.168.1.102:/data/testnfs /mnt
> > [tcp] 192.168.1.102:/data/testnfs: Permission denied
> >
> > % doas showmount -e 192.168.1.102
> > Exports list on 192.168.1.102:
> >
> > (empty)
> >
> > If I set, on the server
> >
> > % doas zfs set sharenfs="maproot=root -alldirs 192.168.1.100" data/testnfs
> >
> > then, to make sure
> >
> > % cat /etc/zfs/exports | ug testnfs
> > /data/testnfs -maproot=root -alldirs 192.168.1.100
> >
> > then, stop everything nfsd
> >
> > # service mountd stop
> > Stopping mountd.
> > Waiting for PIDS: 97329.
> >
> > # service rpcbind stop
> > Stopping rpcbind.
> > Waiting for PIDS: 85322.
> >
> > # service nfsd stop
> > Stopping nfsd.
> > Waiting for PIDS: 34878 35066.
> > #
> >
> > in /var/log/messages on the server, I see
> >
> > nfsd[34878]: rpcb_unset failed
> >
> > Start all of nfsd it starts everything else
> >
> > # service nfsd start
> >   NFS on reserved port only=YES
> >   NFSv4 is disabled
> >   Starting rpcbind.
> >   Starting mountd.
> >   Starting nfsd.
> > #
> >
> > On the client:
> >
> > % doas showmount -e 192.168.1.102
> > Exports list on 192.168.1.102:
> >
> > (empty)
> >
> > I ran 'zfs share -a' and also 'zfs share data/testnfs'. I see
> > mountd[1148]: mount request denied from 192.168.1.100 for /data/testnfs in
> > '/var/log/messages' on the server
> >
> > --
> >
> >