3541 		struct mtop mtc;  in st_ioctl()  local
3543 		if (_IOC_SIZE(cmd_in) != sizeof(mtc)) {  in st_ioctl()
3548 		i = copy_from_user(&mtc, p, sizeof(struct mtop));  in st_ioctl()
3554 		if (mtc.mt_op == MTSETDRVBUFFER && !capable(CAP_SYS_ADMIN)) {  in st_ioctl()
3561 		    (mtc.mt_op != MTSETDRVBUFFER &&  in st_ioctl()
3562 		     (mtc.mt_count & MT_ST_OPTIONS) == 0)) {  in st_ioctl()
3570 				if (mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM ||  in st_ioctl()
3571                                     mtc.mt_op == MTEOM) {  in st_ioctl()
3572 					mtc.mt_count -= 1;  in st_ioctl()
3575 				} else if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM) {  in st_ioctl()
3576 					mtc.mt_count += 1;  in st_ioctl()
3582 			if (mtc.mt_op == MTSEEK) {  in st_ioctl()
3588 				i = mtc.mt_op == MTREW || mtc.mt_op == MTOFFL ||  in st_ioctl()
3589 				    mtc.mt_op == MTRETEN || mtc.mt_op == MTEOM ||  in st_ioctl()
3590 				    mtc.mt_op == MTLOCK || mtc.mt_op == MTLOAD ||  in st_ioctl()
3591 				    mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM ||  in st_ioctl()
3592 				    mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM ||  in st_ioctl()
3593 				    mtc.mt_op == MTCOMPRESSION;  in st_ioctl()
3601 			    (mtc.mt_op == MTREW || mtc.mt_op == MTOFFL ||  in st_ioctl()
3602 			     mtc.mt_op == MTSEEK ||  in st_ioctl()
3603 			     mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM)) {  in st_ioctl()
3609 				if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM)  in st_ioctl()
3610 					mtc.mt_count++;  in st_ioctl()
3620 			if (mtc.mt_op != MTREW &&  in st_ioctl()
3621 			    mtc.mt_op != MTOFFL &&  in st_ioctl()
3622 			    mtc.mt_op != MTRETEN &&  in st_ioctl()
3623 			    mtc.mt_op != MTERASE &&  in st_ioctl()
3624 			    mtc.mt_op != MTSEEK &&  in st_ioctl()
3625 			    mtc.mt_op != MTEOM) {  in st_ioctl()
3634 		if (mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK &&  in st_ioctl()
3635 		    mtc.mt_op != MTSETDENSITY && mtc.mt_op != MTWSM &&  in st_ioctl()
3636 		    mtc.mt_op != MTSETDRVBUFFER && mtc.mt_op != MTSETPART)  in st_ioctl()
3639 		if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED)  in st_ioctl()
3642 		if (mtc.mt_op == MTSETDRVBUFFER &&  in st_ioctl()
3643 		    (mtc.mt_count & MT_ST_OPTIONS) != 0) {  in st_ioctl()
3644 			retval = st_set_options(STp, mtc.mt_count);  in st_ioctl()
3648 		if (mtc.mt_op == MTSETPART) {  in st_ioctl()
3650 			    mtc.mt_count < 0 || mtc.mt_count >= ST_NBR_PARTITIONS) {  in st_ioctl()
3654 			if (mtc.mt_count >= STp->nbr_partitions &&  in st_ioctl()
3659 			if (mtc.mt_count >= STp->nbr_partitions) {  in st_ioctl()
3663 			STp->new_partition = mtc.mt_count;  in st_ioctl()
3668 		if (mtc.mt_op == MTMKPART) {  in st_ioctl()
3678 			i = partition_tape(STp, mtc.mt_count);  in st_ioctl()
3689 			STp->nbr_partitions = mtc.mt_count != 0 ? 2 : 1;  in st_ioctl()
3695 		if (mtc.mt_op == MTSEEK) {  in st_ioctl()
3696 			i = set_location(STp, mtc.mt_count, STp->new_partition, 0);  in st_ioctl()
3703 		if (mtc.mt_op == MTUNLOAD || mtc.mt_op == MTOFFL) {  in st_ioctl()
3708 		if (mtc.mt_op == MTLOAD) {  in st_ioctl()
3709 			retval = do_load_unload(STp, file, max(1, mtc.mt_count));  in st_ioctl()
3713 		if (mtc.mt_op == MTLOCK || mtc.mt_op == MTUNLOCK) {  in st_ioctl()
3714 			retval = do_door_lock(STp, (mtc.mt_op == MTLOCK));  in st_ioctl()
3724 		if (mtc.mt_op == MTCOMPRESSION)  in st_ioctl()
3725 			retval = st_compression(STp, (mtc.mt_count & 1));  in st_ioctl()
3727 			retval = st_int_ioctl(STp, mtc.mt_op, mtc.mt_count);  in st_ioctl()