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import os
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
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