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This fixes: https://bugzilla.redhat.com/show_bug.cgi?id=702044 https://bugzilla.redhat.com/show_bug.cgi?id=709454 Both of these complain of a failure to use an image file that resides on a read-only NFS volume. The function in the DAC security driver that chowns image files to the qemu user:group before using them already has special cases to ignore failure of chown on read-only file systems, and in a few other cases, but it hadn't been checking for EINVAL, which is what is returned if the qemu user doesn't even exist on the NFS server. Since the explanation of EINVAL in the chown man page almost exactly matches the log message already present for the case of EOPNOTSUPP, I've just added EINVAL to that same conditional.
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>