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497dcafc2e
The patch makes some refactoring of the existing code. Current boot order spec code makes very simple thing in somewhat obscure way. In case of VMs it sets the first hdd as the only bootable device. In case of CTs it doesn't touch the boot order at all if one of the filesystems is mounted to root. Otherwise like in case of VMs it sets the first hdd as the only bootable device and additionally sets this device mount point to root. Refactored code makes all this explicit. The actual boot order support is simple. Common libvirt domain xml parsing code makes the exact ordering of disks devices as described in docs for boot ordering (disks are sorted by bus order first, device target second. Bus order is the order of disk buses appearence in original xml. Device targets order is alphabetical). We add devices in the same order and SDK designates device indexes sequentially for each device type. Thus device index is equal to its boot index. For example N-th cdrom in boot specification refers to sdk cdrom with it's device index N. If there is no boot spec in xml the parsing code will add <boot dev='hdd'> for HVMs automatically and we backward compatibly set fist hdd as bootable. Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com> Signed-off-by: Maxim Nestratov <mnestratov@virtuozzo.com>
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>