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from bootstrapvz.base.fs.volume import Volume
from ..tools import log_check_call
class LoopbackVolume(Volume):
extension = 'raw'
def create(self, image_path):
self.fsm.create(image_path=image_path)
def _before_create(self, e):
self.image_path = e.image_path
size_opt = '--size={mib}M'.format(mib=self.size.bytes.get_qty_in('MiB'))
log_check_call(['truncate', size_opt, self.image_path])
def _before_attach(self, e):
[self.loop_device_path] = log_check_call(['losetup', '--show', '--find', '--partscan', self.image_path])
self.device_path = self.loop_device_path
def _before_detach(self, e):
log_check_call(['losetup', '--detach', self.loop_device_path])
del self.loop_device_path
self.device_path = None
def _before_delete(self, e):
from os import remove
remove(self.image_path)
del self.image_path
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