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27f45438c8
When creating qcow2 files with a backing store, it is important to set an explicit format to prevent QEMU probing. The storage backend was only doing this if it found a 'kvm-img' binary. This is wrong because plenty of kvm-img binaries don't support an explicit format, and plenty of 'qemu-img' binaries do support a format. The result was that most qcow2 files were not getting a backing store format. This patch runs 'qemu-img -h' to check for the two support argument formats '-o backing_format=raw' '-F raw' and use whichever option it finds * src/storage/storage_backend.c: Query binary to determine how to set the backing store format
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>