Why is NFS v4 not activated by default on Armbian?

[Rötti]

Hello,

 

I just installed Armbian on my SBC based on Ubuntu 20.04.3 LTS (Focal Fossa).
 

> cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.3 LTS (Focal Fossa)"
PRETTY_NAME="Armbian 21.08.2 Focal"
VERSION_ID="20.04"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

 

Installed NFSD server via apt-get install nfs-kernel-server and checked which version of NFS is supported:

> cat /proc/fs/nfsd/versions
-2 +3

> rpcinfo -u localhost nfs
program 100003 version 3 ready and waiting

 

Indicating NFSD is not supporting v4. That might be because of:
 

> zcat /proc/config.gz | grep NFS
# CONFIG_USB_FUNCTIONFS is not set
CONFIG_XENFS=m
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_KERNFS=y
CONFIG_NFS_FS=m
CONFIG_NFS_V2=m
CONFIG_NFS_V3=m
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=m
# CONFIG_NFS_SWAP is not set
# CONFIG_NFS_V4_1 is not set
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFS_DISABLE_UDP_SUPPORT=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
# CONFIG_NFSD_V3_ACL is not set
# CONFIG_NFSD_V4 is not set
CONFIG_NFS_ACL_SUPPORT=m
CONFIG_NFS_COMMON=y

 

Question:

Why is CONFIG_NFSD_V4 is not set by default?

[Werner]

Probably no specific reason. Send PR to enable it across all configs.

[Rötti]

Ok, will do.

 

One question on that:

In which config?
- /config/kernel/linux-mvebu64-current.config

- /config/kernel/linux-mvebu64-edge.config

In legacy it's already enabled...

[Werner]

Ideally in all configs across all board families to reduce fragmentation.

[Rötti]

Hi @Werner

 

now over the holidays I've found some spare time to do the testing. The work is done and NFSD v4 is now included on all configs across all boards. I tested it and it worked:

 

root@espressobin:~# rpcinfo -p localhost | grep nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100003    3   udp   2049  nfs

 

Be aware that I could only test it on my EspressoBin board, so I can't make any promises for all other boards.

 

Because of the fact that I'm avoiding Micro$oft products at all costs I don't own a Github account and don't intend in doing so. So I asked my Rakudo (Perl6) friends and one of them created the branch: https://github.com/patrickbkr/build/tree/unify-nfs-config

 

That means that you'll receive a pull request on my behalf today evening.

 

Happy new year 2022!

[Rötti]

To whom it may concern.

Here is the link to the pull request: https://github.com/armbian/build/pull/3376

 

This is hopefully going to solve a lot of problems for all the SBC-users trying to get their NFSv3 stuff mounted on NextCloud.