[libvirt] [RFC PATCH 0/6] New API to normalize the device XML

The initial purpose was to fix a regression for detaching device, (introduced by commit ea7182c29). There was a patch posted to resolve the problem: https://www.redhat.com/archives/libvir-list/2011-December/msg00818.html But as Eric suggested, it's not the ideal way to go, we never known how many stuffs like <address> will be involved in future. So new API to invoke the internal parsing functions might be a right way then. However, things are not that simple (an API without internal driver support, invoking the parsing functions directly). As the domain conf is a neccessary argument to parse the device XML. (e.g. for an Input device). Although we can bypass that by modification on virDomainDeviceDefParse, it could be trap as we will parse the device XML in another way which is different with the real parsing. So finally I choosed to implement the driver support for the new API. There might be something I didn't take into consideration, (e.g. Do we need some flags for the XML parsing and formating?). But it can demo the thought good enough. On the other hand, I'm wondering if it's deserved to introduce such an API, comparing it's usage, is it two heavy if we need the internal drivers support for such an API? Any thoughts and feedback is welcomed. [PATCH 1/6] normalize_xml: Define the new API [PATCH 2/6] normalize_xml: Implement the new API [PATCH 3/6] normalize_xml: Wire up the remote protocol [PATCH 4/6] normalize_xml: New internal API to format device XML [PATCH 5/6] normalize_xml: Implement qemu driver support [PATCH 6/6] normalize_xml: New virsh command to normalize device XML Regards, Osier