def get_device_name_for_instance(context, instance, bdms, device):
"""Validates (or generates) a device name for instance.
This method is a wrapper for get_next_device_name that gets the list
of used devices and the root device from a block device mapping.
"""
mappings = block_device.instance_block_mapping(instance, bdms)
return get_next_device_name(instance, mappings.values(),
mappings['root'], device)
def get_device_name_for_instance(context, instance, bdms, device):
"""Validates (or generates) a device name for instance.
This method is a wrapper for get_next_device_name that gets the list
of used devices and the root device from a block device mapping.
"""
mappings = block_device.instance_block_mapping(instance, bdms)
return get_next_device_name(instance, mappings.values(), mappings['root'],
device)
def _format_instance_mapping(ctxt, instance):
bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
ctxt, instance.uuid)
return block_device.instance_block_mapping(instance, bdms)