if err != nil {
			return err
		}
		defer dec.Close()
		return d.DecodeMsg(msgp.NewReader(dec))
	default:
		return fmt.Errorf("dataUsageCache: unknown version: %d", ver)
	}
}

// Trim this from start+end of hashes.
var hashPathCutSet = dataUsageRoot

func init() {
	if dataUsageRoot != string(filepath.Separator) {
		hashPathCutSet = dataUsageRoot + string(filepath.Separator)
	}
}