def test_subvolume_id(self):
dir = os.path.join(self.mountpoint, 'foo')
os.mkdir(dir)
for arg in self.path_or_fd(self.mountpoint):
with self.subTest(type=type(arg)):
self.assertEqual(btrfsutil.subvolume_id(arg), 5)
for arg in self.path_or_fd(dir):
with self.subTest(type=type(arg)):
self.assertEqual(btrfsutil.subvolume_id(arg), 5)
def test_subvolume_id(self):
dir = os.path.join(self.mountpoint, 'foo')
os.mkdir(dir)
for arg in self.path_or_fd(self.mountpoint):
with self.subTest(type=type(arg)):
self.assertEqual(btrfsutil.subvolume_id(arg), 5)
for arg in self.path_or_fd(dir):
with self.subTest(type=type(arg)):
self.assertEqual(btrfsutil.subvolume_id(arg), 5)
def test_subvolume_id_error(self):
fd = os.open('/dev/null', os.O_RDONLY)
try:
btrfsutil.subvolume_id(fd)
except Exception:
pass
finally:
# btrfs_util_subvolume_id_fd() had a bug that would erroneously
# close the provided file descriptor. In that case, this will fail
# with EBADF.
os.close(fd)
def test_subvolume_id_error(self):
fd = os.open('/dev/null', os.O_RDONLY)
try:
btrfsutil.subvolume_id(fd)
except Exception:
pass
finally:
# btrfs_util_subvolume_id_fd() had a bug that would erroneously
# close the provided file descriptor. In that case, this will fail
# with EBADF.
os.close(fd)
def get_subvolume_from(self, filesystem_path: Path) -> Optional[Subvolume]:
logger = self._logger
if not filesystem_path.exists():
raise SubvolumeError(
f"The '{filesystem_path}' path does not exist!")
if not filesystem_path.is_dir():
raise SubvolumeError(
f"The '{filesystem_path}' path does not represent a directory!"
)
try:
filesystem_path_str = str(filesystem_path)
if btrfsutil.is_subvolume(filesystem_path_str):
subvolume_id = btrfsutil.subvolume_id(filesystem_path_str)
subvolume_path = btrfsutil.subvolume_path(
filesystem_path_str, subvolume_id)
subvolume_read_only = btrfsutil.get_subvolume_read_only(
filesystem_path_str)
subvolume_info = btrfsutil.subvolume_info(
filesystem_path_str, subvolume_id)
self_uuid = default_if_none(
try_convert_bytes_to_uuid(subvolume_info.uuid),
constants.EMPTY_UUID,
)
parent_uuid = default_if_none(
try_convert_bytes_to_uuid(subvolume_info.parent_uuid),
constants.EMPTY_UUID,
)
return Subvolume(
filesystem_path,
subvolume_path,
datetime.fromtimestamp(subvolume_info.otime),
UuidRelation(self_uuid, parent_uuid),
NumIdRelation(subvolume_info.id, subvolume_info.parent_id),
subvolume_read_only,
)
except btrfsutil.BtrfsUtilError as e:
logger.exception("btrfsutil call failed!")
raise SubvolumeError(
f"Could not initialize the subvolume for '{filesystem_path}'!"
) from e
return None