Re: port-xen/56782: panic: /: bad dir ino null entry

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Thu, 7 Apr 2022 18:49:59 +0200
    From:        Bartosz Maciejewski <bartosz%maciejewski.org@localhost>
    Message-ID:  <56786d2f-90f0-6388-21ae-3410cc735973%maciejewski.org@localhost>

  | Guest is running Nagios. Will try to rebuild, or delete and install it 
  | again. Maybe something went off during updates of NetBSD and Nagios.

Unlikely, there's nothing Nagios can do to overwrite directory blocks,
no matter how hard it tried.

But it is easy for a drive misconfiguration to cause almost
anything.

Show us (on the guest with the problems) the labels of all drives (or
pseudo-drives) - all the xbd devices that exist on the system - if they
are GPT partitioned, show that, otherwise the disklabel.

Also show the contents of /etc/fstab

If you have access to the Dom0 also show the configuration of the guest,
and any other guests that are running (the drive configuration section is
what matters) and the labels from any (real) drives connected to that
system.

Somewhere in all of that is likely to be the cause of the problem.
Until it is fixed, you want to be very careful using that guest
system - almost anything might be corrupted next.

kre