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We will want to allow silent failure of virNetDevSetMAC() in the case that the SIOSIFHWADDR ioctl fails with errno == EADDRNOTAVAIL. (Yes, that is very specific, but we really *do* want a logged failure in all other circumstances, and don't want to duplicate code in the caller for the other possibilities). This patch renames the 3 different virNetDevSetMAC() functions to virNetDevSetMACInternal(), adding a 3rd arg called "quiet" and making them static (because this extra control will only be needed within virnetdev.c). A new global virNetDevSetMAC() is defined that calls whichever of the three *Internal() functions gets compiled with quiet = false. Callers in virnetdev.c that want to notice a failure with errno == EADDRNOTAVAIL and retry with a different strategy rather than immediately failing, can call virNetDevSetMACInternal(..., true).
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>