ISCSI_LUN_BYTE_COPY
ISCSI_LUN_BYTE_COPY(ihp->lun, icmdp->cmd_un.scsi.lun);
ISCSI_LUN_BYTE_COPY(istmh->lun,
ISCSI_LUN_BYTE_COPY(istmh->lun, icmdp->cmd_lun->lun_num);
ISCSI_LUN_BYTE_COPY(ihp->lun, lun);