HEAD UP possible disk corruption for linux guests

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello
be warned that on a NetBSD dom0 running netbsd-10 or HEAD (anything with
xbdback_xenbus.c 1.83 or newer, really), a linux domU may corrupt its
virtual disk with a real risk of data loss (been there ...)
The problem is that rev 1.83 oversimplifed the xbd implementation and
doens't properly handle some request allowed by the xbd protocol.
This should be fixed with xbdback_xenbus.c 1.105 which I just commited.

If you get a linux message about xfs corruption don't try xfs_repair
without a backup of you virtual disk image (it's possible that the
on-disk data is not corrupted yet). In my case xfs_repair returned an
almost empty file system :/

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--