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https://bugzilla.redhat.com/show_bug.cgi?id=1210587 (partial) If a SCSI subsystem <hostdev> element address is provided, we need to make sure the address provided doesn't conflict with an existing or libvirt generated address for a SCSI <disk> element. We can handle this condition in device post processing since we're not generating an address based on some target name - rather it's either generated based on space or provided from the user. If the user provides one that conflicts, then we need to disallow the change. This will fix the issue where the domain XML provided an <address> for the <hostdev>, but not the <disk> element where the address provided ends up being the same address used for the <disk>. A <disk> address is generated using it's assigned <target> 'dev' name prior to the check/validation of the <hostdev> address value.
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>