Fill in paths.

        :arg paths: = { Store.Volume: ["linux path",]}

def _fillVolumesAndPaths(self, paths):
        """ Fill in paths.

        :arg paths: = { Store.Volume: ["linux path",]}
        """
        self.diffs = collections.defaultdict((lambda: []))
        self.extraKeys = {}

        for key in self.bucket.list():
            if key.name.startswith(theTrashPrefix):
                continue

            keyInfo = self._parseKeyName(key.name)

            if keyInfo is None:
                if key.name[-1:] != '/':
                    logger.warning("Ignoring '%s' in S3", key.name)
                continue

            if keyInfo['type'] == 'info':
                stream = io.BytesIO()
                key.get_contents_to_file(stream)
                Store.Volume.readInfo(stream)
                continue

            if keyInfo['from'] == 'None':
                keyInfo['from'] = None

            path = self._relativePath("/" + keyInfo['fullpath'])

            if path is None:
                continue

            diff = Store.Diff(self, keyInfo['to'], keyInfo['from'], key.size)

            logger.debug("Adding %s in %s", diff, path)

            self.diffs[diff.fromVol].append(diff)
            paths[diff.toVol].append(path)

            self.extraKeys[diff] = path