[Bug 1964093] [NEW] nfsver=3,udp not working anymore

[Jörg Hänsel]

Public bug reported:

Package: nfs-kernel-server
Architecture: amd64
Version: 1:2.6.1-1~exp1ubuntu1

nfsversion 3 with proto udp seems not to be supported by the nfs-kernel-
server anymore.

In Ubuntu 18.04 (nfs-kernel-server 1:1.3.4-2.1ubuntu5) it was still
possible. I could mount with either tcp or udp:

1. tcp
mount -o nfsvers=3 192.168.0.1:/srv/nfs/testshare /mnt

mount|grep mnt:

192.168.0.1:/srv/nfs/testshare on /mnt type nfs
(rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.0.1,mountvers=3,mountport=59808,mountproto=udp,local_lock=none,addr=192.168.0.1)


2. udp
mount -o nfsvers=3,udp 192.168.0.1:/srv/nfs/testshare /mnt

mount|grep mnt:

192.168.0.1:/srv/nfs/testshare on /mnt type nfs
(rw,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,hard,proto=udp,timeo=11,retrans=3,sec=sys,mountaddr=192.168.0.1,mountvers=3,mountport=59808,mountproto=udp,local_lock=none,addr=192.168.0.1)


Now in Ubuntu 22.04 I get the message:

mount.nfs: an incorrect mount option was specified


I tried to enable upd in /etc/nfs.conf in section [nfsd]:


[nfsd]
# debug=0
# threads=8
# host=
# port=0
# grace-time=90
# lease-time=90
# udp=n
udp=y
# tcp=y
# vers2=n
# vers3=y

But there was no effect.

nfs3 with udp is needed by several busybox mount binaries in initrds of
Knoppix and other live distributions used via PXE boot.

Best regards
Jörg

** Affects: nfs-utils (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to nfs-utils in Ubuntu.
https://bugs.launchpad.net/bugs/1964093

Title:
  nfsver=3,udp not working anymore

Status in nfs-utils package in Ubuntu:
  New

Bug description:
  Package: nfs-kernel-server
  Architecture: amd64
  Version: 1:2.6.1-1~exp1ubuntu1

  nfsversion 3 with proto udp seems not to be supported by the nfs-
  kernel-server anymore.

  In Ubuntu 18.04 (nfs-kernel-server 1:1.3.4-2.1ubuntu5) it was still
  possible. I could mount with either tcp or udp:

  1. tcp
  mount -o nfsvers=3 192.168.0.1:/srv/nfs/testshare /mnt

  mount|grep mnt:

  192.168.0.1:/srv/nfs/testshare on /mnt type nfs
  (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.0.1,mountvers=3,mountport=59808,mountproto=udp,local_lock=none,addr=192.168.0.1)

  
  2. udp
  mount -o nfsvers=3,udp 192.168.0.1:/srv/nfs/testshare /mnt

  mount|grep mnt:

  192.168.0.1:/srv/nfs/testshare on /mnt type nfs
  (rw,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,hard,proto=udp,timeo=11,retrans=3,sec=sys,mountaddr=192.168.0.1,mountvers=3,mountport=59808,mountproto=udp,local_lock=none,addr=192.168.0.1)

  
  Now in Ubuntu 22.04 I get the message:

  mount.nfs: an incorrect mount option was specified

  
  I tried to enable upd in /etc/nfs.conf in section [nfsd]:

  
  [nfsd]
  # debug=0
  # threads=8
  # host=
  # port=0
  # grace-time=90
  # lease-time=90
  # udp=n
  udp=y
  # tcp=y
  # vers2=n
  # vers3=y

  But there was no effect.

  nfs3 with udp is needed by several busybox mount binaries in initrds
  of Knoppix and other live distributions used via PXE boot.

  Best regards
  Jörg

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/1964093/+subscriptions