def parse_dir_inode_data(self, data: bytes) -> OverlayDir:
from thrift.util import Serializer
from thrift.protocol import TCompactProtocol
tree_data = OverlayDir()
protocol_factory = TCompactProtocol.TCompactProtocolFactory()
Serializer.deserialize(protocol_factory, data, tree_data)
return tree_data
def write_empty_dir(self, inode_number: int) -> None:
from thrift.util import Serializer
from thrift.protocol import TCompactProtocol
empty_tree = OverlayDir()
protocol_factory = TCompactProtocol.TCompactProtocolFactory()
contents = typing.cast(
bytes, Serializer.serialize(protocol_factory, empty_tree))
self._write_inode(inode_number, OverlayHeader.TYPE_DIR, contents)
def parse_dir_inode_data(self, data: bytes) -> OverlayDir:
from thrift.util import Serializer
from thrift.protocol import TCompactProtocol
# Initialize entries to the empty dictionary.
# This value will be used if the serialized data does not have any value
# for this field.
tree_data = OverlayDir(entries={})
protocol_factory = TCompactProtocol.TCompactProtocolFactory()
Serializer.deserialize(protocol_factory, data, tree_data)
return tree_data
def _load_overlay_tree(overlay_dir: str, inode_number: int) -> OverlayDir:
from thrift.util import Serializer
from thrift.protocol import TCompactProtocol
dir_name = '{:02x}'.format(inode_number % 256)
overlay_file_path = os.path.join(overlay_dir, dir_name, str(inode_number))
with open(overlay_file_path, 'rb') as f:
data = f.read()
assert data[0:4] == b'OVDR'
tree_data = OverlayDir()
protocol_factory = TCompactProtocol.TCompactProtocolFactory()
Serializer.deserialize(protocol_factory, data[64:], tree_data)
return tree_data