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Found by Laine and discussed a bit on internal IRC. Commit id c56fe7f1d6 added support for creating a command line to support scsi-disk.channel. Series was here: http://www.redhat.com/archives/libvir-list/2012-February/msg01052.html Which pointed to a design proposal here: http://permalink.gmane.org/gmane.comp.emulators.libvirt/50428 Which states (in part): Libvirt should check for the QEMU "scsi-disk.channel" property. If it is unavailable, QEMU will only support channel=lun=0 and 0<=target<=7. However, the check added was ensuring that bus != lun *and* bus != 0. So if bus == lun and both were non zero, we'd never make the second check. Changing this to an *or* check fixes the check, but still is less readable than the just checking each for 0
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>