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Keir Fraser
f8ffd3b21f
This patches adapts XenD so that it is capable of starting a qemu-dm device model for both paravirt and fullyvirt guests. A paravirt guest will only be given a device model if it has a VFB configured, or the user explicitly include the device_model option in the config config. This avoids unnecessary overhead for those wanting a minimal paravirt guest. The bulk of this patch involves moving code from the HVMImageHandler into the base ImageHandler class. The HVMImageHandler and LinuxImageHandler subclasses now merely containing a couple of overrides to set some specific command line flags. The most important is -M xenpv, vs -M xenfv. The XenConfig class has a minor refactoring to add a has_rfb() method to avoid duplicating code in a couple of places. Instead of hardcoding DEFAULT_DM it now uses the xen.util.auxbin APIs to locate it - this works on platforms where qemu-dm is in /usr/lib64 instead of /usr/lib. As before paravirt only gets a default qemu-dm if using a VFB. The vfbif.py class is trimmed out since it no longer needs to spawn a daemon. A few other misc fixes deal with qemu-dm interactions when saving/restoring, and in particular recovering from save failures (or checkpointing). Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The file test.py here is from the Zope project, and is Copyright (c) 2001, 2002 Zope Corporation and Contributors. This file is released under the Zope Public License, version 2.0, a copy of which is in the file ZPL-2.0.