from .operations.index import Index from .operations.group import Group from .operations.trash import Trash from .operations.versions.subvolume_base import SubvolumeBase class VolSpec(object): """ specification of a "volume" -- base directory and various prefixes. """ # where shall we (by default) create subvolumes DEFAULT_SUBVOL_PREFIX = "/volumes" # and the default namespace DEFAULT_NS_PREFIX = "fsvolumens_" # default mode for subvol prefix and group DEFAULT_MODE = 0o755 # internal directories INTERNAL_DIRS = [Group.NO_GROUP_NAME, Index.GROUP_NAME, Trash.GROUP_NAME, SubvolumeBase.LEGACY_CONF_DIR] def __init__(self, snapshot_prefix, subvolume_prefix=None, pool_ns_prefix=None): self.snapshot_prefix = snapshot_prefix self.subvolume_prefix = subvolume_prefix if subvolume_prefix else VolSpec.DEFAULT_SUBVOL_PREFIX self.pool_ns_prefix = pool_ns_prefix if pool_ns_prefix else VolSpec.DEFAULT_NS_PREFIX @property def snapshot_dir_prefix(self): """ Return the snapshot directory prefix """ return self.snapshot_prefix @property def base_dir(self): """ Return the top level directory under which subvolumes/groups are created """ return self.subvolume_prefix @property def fs_namespace(self): """ return a filesystem namespace by stashing pool namespace prefix and subvolume-id """ return self.pool_ns_prefix