Hi,

The Linux kernel now has its own AFS client filesystem included in it, and this has been turned on in the Fedora kernel: https://bugzilla.redhat.com/show_bug.cgi?id=1616016

To make the userspace side "work out of the box", I have a kafs-client package that I'm preparing to propose for inclusion in Fedora:

http://git.infradead.org/users/dhowells/kafs-client.git/shortlog/refs/heads/next

Amongst other bits, this has a systemd unit file that mounts the AFS dynamic root.

But this is where the problem starts: To be compatible with 35 years' worth of AFS experience, scripting and history, and to be compatible with OpenAFS, Auristor, Arla and Transarc on UNIX, I need to mount the dynamic root on "/afs". That is what users of AFS expect; this is what the AFS documentation assumes everywhere. It's a global namespace expected to be rooted on that directory on every partaking machine. (With the exception of Windows, where it couldn't work like this).

The issue is, however, that this is a "new" top-level directory as far as Fedora is concerned - kind of[*], and so it requires FPC approval as I'm led to understand things.

[*] Note that the SELinux policy expects /afs to be a mountpoint already:
matchpathcon /afs/
/afs system_u:object_r:mnt_t:s0

So what do I do about this? Ideally, I'd have the /afs directory created by installation of kafs-client and removed on its removal. I was creating the dir during kafs-client %install and then doing:

%files
/afs

but that doesn't upgrade correctly. Someone gave me a fix that creates the dir on the fly:

%post
%systemd_post afs.mount
# Create /afs directory if it doesn't exist
if [ ! -d /afs ]; then
    mkdir /afs
    chown root.root /afs
    chmod 0755 /afs
    [ -x /usr/sbin/restorecon ] && /usr/sbin/restorecon /afs
fi
%files
%ghost %dir /afs

but rpmlint complains about the chown:

kafs-client.x86_64: W: dangerous-command-in-%post chown

I could have systemd create it when creating the mount and attempt to remove it later.

Anyway, any guidance would be appreciated.
Thanks,
David