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054d43f570
https://bugzilla.redhat.com/show_bug.cgi?id=638285 - when migrating a guest, it was very easy to provoke a race where an application could query block information on a VM that had just been migrated away. Any time qemu code obtains a job lock, it must also check that the VM was not taken down in the time where it was waiting for the lock. * src/qemu/qemu_driver.c (qemudDomainSetMemory) (qemudDomainGetInfo, qemuDomainGetBlockInfo): Check that vm still exists after obtaining job lock, before starting monitor action.
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>