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...and cleanup the callers to report it when it *is* an error. In many cases It's useful for virPCIGetNetName() to not log an error and simply return a NULL pointer when the given device isn't bound to a net driver (e.g. we're looking at a VF that is permanently bound to vfio-pci). The existing code would silently return an error in this case, which could eventually lead to the dreaded "An error occurred but the cause is unknown" log message. This patch changes virPCIGetNetName() to still return success if the device simply isn't bound to a net driver, and adjusts all the callers that require a non-null netname to check for that condition and log an error when it happens.
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>