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dbad8f8aee
qemu for some time already sets node names automatically for the block nodes. This patch adds code that attempts a best-effort detection of the node names for the backing chain from the output of 'query-named-block-nodes'. The only drawback is that the data provided by qemu needs to be matched by the filename as seen by qemu and thus if two disks share a single backing store file the detection won't work. This will allow us to use qemu commands such as 'block-set-write-threshold' which only accepts node names. In this patch only the detection code is added, it will be used later.
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>