[Libguestfs] [PATCH INCOMPLETE] daemon: Reimplement LVM filters using lvmdevices command

[Richard W.M. Jones]

LVM2 managed to break device filters.  This patch attempts a fix.

https://bugzilla.redhat.com/show_bug.cgi?id=1965941

However it is not working, because the new "lvmdevices" command which
is supposed to be used to set the new filters does not work for
partitioned whole devices.  As far as I can tell there is no way to
emulate the old behaviour of filtering such a device.  (Adding filters
for each partition in the device is one possible workaround, but the
filters will be out of date as soon as a new partition is created on
the device.)

While I investigate this, I'm posting the patch FYI.

Rich.