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These three functions are destined to replace virNetDev(Replace|Restore)NetConfig() and virNetDev(Replace|Restore)MacAddress(), which both do the save and set together as a single step. We need to separate the save, read, and set steps because there will be situations where we need to do something else in between (in particular, we will need to rebind a VF's driver after save but before set). This patch creates the new functions, but doesn't call them - that will come in a subsequent patch. Note that the new functions to read/write the file that stores the original network config now uses JSON rather than plaintext (it still recognizes the old format as well though, so it won't get confused during an upgrade).
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>