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According to docs/schemas/domaincommon.rng and _virDomainBlockIoTuneInfo all the iotune values are interpreted as unsigned long long, however according to qemu_monitor_json.c, qemu silently truncates numbers larger than LLONG_MAX. There's really not much of a usage for such large numbers anyway yet. This patch provides the same overflow check during a domain start as it does during setting a blkdeviotune element in qemu_driver.c and thus reports an error when a larger number than LLONG_MAX is detected. https://bugzilla.redhat.com/show_bug.cgi?id=1131876
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>