30  * It formats the devicename of the indicated disk into
271  * Must be called either with bd_mutex held, before a disk can be opened or
272  * after all disk users are gone.
274 void delete_partition(struct gendisk *disk, int partno)  in delete_partition()  argument
277 		rcu_dereference_protected(disk->part_tbl, 1);  in delete_partition()
310  * Must be called either with bd_mutex held, before a disk can be opened or
311  * after all disk users are gone.
313 struct hd_struct *add_partition(struct gendisk *disk, int partno,  in add_partition()  argument
319 	struct device *ddev = disk_to_dev(disk);  in add_partition()
325 	err = disk_expand_part_tbl(disk, partno);  in add_partition()
328 	ptbl = rcu_dereference_protected(disk->part_tbl, 1);  in add_partition()
347 		queue_limit_alignment_offset(&disk->queue->limits, start);  in add_partition()
349 		queue_limit_discard_alignment(&disk->queue->limits, start);  in add_partition()
352 	p->policy = get_disk_ro(disk);  in add_partition()
355 		struct partition_meta_info *pinfo = alloc_part_info(disk);  in add_partition()
408 	/* suppress uevent if the disk suppresses it */  in add_partition()
430 static bool disk_unlock_native_capacity(struct gendisk *disk)  in disk_unlock_native_capacity()  argument
432 	const struct block_device_operations *bdops = disk->fops;  in disk_unlock_native_capacity()
435 	    !(disk->flags & GENHD_FL_NATIVE_CAPACITY)) {  in disk_unlock_native_capacity()
437 		bdops->unlock_native_capacity(disk);  in disk_unlock_native_capacity()
438 		disk->flags |= GENHD_FL_NATIVE_CAPACITY;  in disk_unlock_native_capacity()
446 static int drop_partitions(struct gendisk *disk, struct block_device *bdev)  in drop_partitions()  argument
454 	res = invalidate_partition(disk, 0);  in drop_partitions()
458 	disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);  in drop_partitions()
460 		delete_partition(disk, part->partno);  in drop_partitions()
466 static bool part_zone_aligned(struct gendisk *disk,  in part_zone_aligned()  argument
473 	 * If this function is called, then the disk is a zoned block device  in part_zone_aligned()
497 		if ((from + size) < get_capacity(disk)) {  in part_zone_aligned()
507 		if ((from + size) < get_capacity(disk) &&  in part_zone_aligned()
516 int rescan_partitions(struct gendisk *disk, struct block_device *bdev)  in rescan_partitions()  argument
527 	res = drop_partitions(disk, bdev);  in rescan_partitions()
531 	if (disk->fops->revalidate_disk)  in rescan_partitions()
532 		disk->fops->revalidate_disk(disk);  in rescan_partitions()
533 	check_disk_size_change(disk, bdev, true);  in rescan_partitions()
535 	if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))  in rescan_partitions()
545 			       disk->disk_name);  in rescan_partitions()
546 			if (disk_unlock_native_capacity(disk))  in rescan_partitions()
559 		       disk->disk_name);  in rescan_partitions()
560 		if (disk_unlock_native_capacity(disk))  in rescan_partitions()
565 	kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);  in rescan_partitions()
568 	 * disk->part_tbl.  This is an optimization and not strictly  in rescan_partitions()
575 	disk_expand_part_tbl(disk, highest);  in rescan_partitions()
586 		if (from >= get_capacity(disk)) {  in rescan_partitions()
589 			       disk->disk_name, p, (unsigned long long) from);  in rescan_partitions()
590 			if (disk_unlock_native_capacity(disk))  in rescan_partitions()
595 		if (from + size > get_capacity(disk)) {  in rescan_partitions()
598 			       disk->disk_name, p, (unsigned long long) size);  in rescan_partitions()
600 			if (disk_unlock_native_capacity(disk)) {  in rescan_partitions()
607 				 * we limit them to the end of the disk to avoid  in rescan_partitions()
610 				size = get_capacity(disk) - from;  in rescan_partitions()
621 		    !part_zone_aligned(disk, bdev, from, size)) {  in rescan_partitions()
624 			       disk->disk_name, p, (unsigned long long) from,  in rescan_partitions()
629 		part = add_partition(disk, p, from, size,  in rescan_partitions()
634 			       disk->disk_name, p, -PTR_ERR(part));  in rescan_partitions()
646 int invalidate_partitions(struct gendisk *disk, struct block_device *bdev)  in invalidate_partitions()  argument
653 	res = drop_partitions(disk, bdev);  in invalidate_partitions()
657 	set_capacity(disk, 0);  in invalidate_partitions()
658 	check_disk_size_change(disk, bdev, false);  in invalidate_partitions()
661 	kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);  in invalidate_partitions()