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Martin Kletzander
717c99f360
qemu: Reject updating unsupported disk information
If one calls update-device with information that is not updatable, libvirt reports success even though no data were updated. The example used in the bug linked below uses updating device with <boot order='2'/> which, in my opinion, is a valid thing to request from user's perspective. Mainly since we properly error out if user wants to update such data on a network device for example. And since there are many things that might happen (update-device on disk basically knows just how to change removable media), check for what's changing and moreover, since the function might be usable in other drivers (updating only disk path is a valid possibility) let's abstract it for any two disks. We can't possibly check for everything since for many fields our code does not properly differentiate between default and unspecified values. Even though this could be changed, I don't feel like it's worth the complexity so it's not the aim of this patch. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1007228
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>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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