Quoting from https://salsa.debian.org/kernel-team/nfs-utils:
| commit
fbd7623dd8d5e418e7cb369d4026d5368f7c46a6
| Author: Jeff Layton <jlayton@redhat.com>
| Date: Wed Apr 5 13:26:49 2017 -0400
|
| nfsd: don't enable a UDP socket by default
|
| Most major NFS clients have supported TCP for at least a decade now,
| and v4-only shops are becoming more prevalent. It seems reasonable that
| serving over UDP should be something that is "opt-in".
|
| I've always hesitated to do this in the past, but now that we have
| nfs.conf, it seems like the time may be right to disable UDP in default
| configurations. In particular, it would be good to try this in the more
| bleeding edge distros (Fedora, Ubuntu, SuSE, etc...) and see how
| problematic it is.
|
| Change the default in rpc.nfsd to just open TCP ports by default. Add
| new -u and -t options that allow users to explicitly override what's
| in the config file, and update the usage message and manpage.
So nowadays the `rpcinfo -u localhost nfs 3` fails, and we end up with a
NFS server having NFS v3 disabled.
While we could switch to `rpcinfo -t localhost nfs 3` instead, there's
probably no need to check for this any longer, as NFS v3 should be
common enough (verified with grml64-full 2021.07 + grml64-full 2022.11-rc1).
Thanks: AndrĂ¡s Korn
Closes: https://github.com/grml/grml-terminalserver/issues/8
}
fi
- if [ -x $PREFIX/bin/rpcinfo ] ; then
- RPCINFO=$PREFIX/bin/rpcinfo
- elif [ -x $PREFIX/sbin/rpcinfo ] ; then
- RPCINFO=$PREFIX/sbin/rpcinfo
- else
- echo "Error: could not locate rpcinfo binary." >&2
- exit 1
- fi
- $RPCINFO -u localhost nfs 3 >/dev/null 2>&1 ||
- RPCMOUNTDOPTS="$RPCMOUNTDOPTS --no-nfs-version 3"
-
[ -z "$ClearAddr" ] || echo "nfsd 127.0.0.1 1" >/proc/net/rpc/auth.unix.ip/channel
start-stop-daemon --start --quiet \