def get_uefi_boot_string(self, mac):
        """Get uefi iscsi boot string for the host

        :returns: iscsi boot string for the system
        :raises: IloError, on an error from iLO.
        """
        boot_sources = self.boot_sources
        if not boot_sources:
            msg = ('Boot sources are not found')
            LOG.debug(msg)
            raise exception.IloError(msg)

        for boot_source in boot_sources:
            if (mac.upper() in boot_source['UEFIDevicePath'] and
                    'iSCSI' in boot_source['UEFIDevicePath']):
                return boot_source['StructuredBootString']
        else:
            msg = ('MAC provided "%s" is Invalid' % mac)
            raise exception.IloInvalidInputError(msg)
Get uefi iscsi boot string for the host

        :returns: iscsi boot string for the system
        :raises: IloError, on an error from iLO.