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I've noticed two problem with the automatically created NVRAM varstore file. The first, even though I run qemu as root:root for some reason I get Permission denied when trying to open the _VARS.fd file. The problem is, the upper directory misses execute permissions, which in combination with us dropping some capabilities result in EPERM. The next thing is, that if I switch SELinux to enforcing mode, I get another EPERM because the vars file is not labeled correctly. It is passed to qemu as disk and hence should be labelled as disk. QEMU may write to it eventually, so this is different to kernel or initrd. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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>