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There are two classes of management apps that track events - one that only cares about on/off (and only needs to track EVENT_STARTED and EVENT_STOPPED), and one that cares about paused/running (also tracks EVENT_SUSPENDED/EVENT_RESUMED). To keep both classes happy, any transition that can go from inactive to paused must emit two back-to-back events - one for started and one for suspended (since later resuming of the domain will only send RESUMED, but the first class isn't tracking that). This also fixes a bug where virDomainCreateWithFlags with the VIR_DOMAIN_START_PAUSED flag failed to start paused when restoring from a managed save image. * include/libvirt/libvirt.h.in (VIR_DOMAIN_EVENT_SUSPENDED_RESTORED) (VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT) (VIR_DOMAIN_EVENT_RESUMED_FROM_SNAPSHOT): New sub-events. * src/qemu/qemu_driver.c (qemuDomainRevertToSnapshot): Use them. (qemuDomainSaveImageStartVM): Likewise, and add parameter. (qemudDomainCreate, qemuDomainObjStart): Send suspended event when starting paused. (qemuDomainObjRestore): Add parameter. (qemuDomainObjStart, qemuDomainRestoreFlags): Update callers. * examples/domain-events/events-c/event-test.c (eventDetailToString): Map new detail strings.
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>