def _PrepareInstanceRootFsBdev(cls, storage_path, stash):
"""Return mountable path for storage_path.
This function creates a partition mapping for storage_path and returns the
first partition device path as a rootfs partition, and stashes the loopback
device path.
If storage_path is not a multi-partition block device, just return
storage_path.
"""
try:
ret = utils.CreateBdevPartitionMapping(storage_path)
except errors.CommandError, err:
raise HypervisorError("Failed to create partition mapping for %s"
": %s" % (storage_path, err))
def _PrepareInstanceRootFsBdev(cls, storage_path, stash):
"""Return mountable path for storage_path.
This function creates a partition mapping for storage_path and returns the
first partition device path as a rootfs partition, and stashes the loopback
device path.
If storage_path is not a multi-partition block device, just return
storage_path.
"""
try:
ret = utils.CreateBdevPartitionMapping(storage_path)
except errors.CommandError as err:
raise HypervisorError("Failed to create partition mapping for %s"
": %s" % (storage_path, err))
if ret is None:
return storage_path
else:
loop_dev_path, dm_dev_paths = ret
stash[cls._STASH_KEY_ALLOCATED_LOOP_DEV] = loop_dev_path
return dm_dev_paths[0]