def _add_fcp(self, fcp):
        """add fcp to db if it's not in db but in fcp list and init it"""
        try:
            LOG.info("fcp %s found in CONF.volume.fcp_list, add it to db" %
                     fcp)
            self.db.new(fcp)
        except Exception:
            LOG.info("failed to add fcp %s into db", fcp)
add fcp to db if it's not in db but in fcp list and init it