self.permissions = Perm::from_bits(permissions).unwrap();

                            self.permissions = Perm::from_bits_truncate(permissions);

        debug!("perm = {:?}", perms);

            Perm::from_bits(perms).unwrap() | Perm::READ

            Perm::from_bits_truncate(perms) | Perm::READ

            Perm::from_bits(perms).unwrap()

            Perm::from_bits_truncate(perms)