block/partitions/core.c

251 	const struct block_device *part = dev_to_bdev(dev);
253 	add_uevent_var(env, "PARTN=%u", part->bd_partno);
254 	if (part->bd_meta_info && part->bd_meta_info->volname[0])
255 		add_uevent_var(env, "PARTNAME=%s", part->bd_meta_info->volname);
266 void drop_partition(struct block_device *part)
268 	lockdep_assert_held(&part->bd_disk->open_mutex);
270 	xa_erase(&part->bd_disk->part_tbl, part->bd_partno);
271 	kobject_put(part->bd_holder_dir);
273 	device_del(&part->bd_device);
274 	put_device(&part->bd_device);
401 	struct block_device *part;
406 	xa_for_each_start(&disk->part_tbl, idx, part, 1) {
407 		if (part->bd_partno != skip_partno &&
408 		    start < part->bd_start_sect + bdev_nr_sectors(part) &&
409 		    start + length > part->bd_start_sect) {
422 	struct block_device *part;
441 	part = add_partition(disk, partno, start, length,
443 	ret = PTR_ERR_OR_ZERO(part);
451 	struct block_device *part = NULL;
455 	part = xa_load(&disk->part_tbl, partno);
456 	if (!part)
460 	if (atomic_read(&part->bd_openers))
464 	 * We verified that @part->bd_openers is zero above and so
465 	 * @part->bd_holder{_ops} can't be set. And since we hold
468 	 * So no need to call @part->bd_holder_ops->mark_dead() here.
472 	remove_inode_hash(part->bd_inode);
473 	invalidate_bdev(part);
474 	drop_partition(part);
484 	struct block_device *part = NULL;
488 	part = xa_load(&disk->part_tbl, partno);
489 	if (!part)
493 	if (start != part->bd_start_sect)
500 	bdev_set_nr_sectors(part, length);
526 	struct block_device *part;
556 	part = add_partition(disk, p, from, size, state->parts[p].flags,
558 	if (IS_ERR(part) && PTR_ERR(part) != -ENXIO) {
560 		       disk->disk_name, p, part);
566 		md_autodetect_dev(part->bd_dev);
634 	struct block_device *part;
649 	xa_for_each_start(&disk->part_tbl, idx, part, 1) {
655 		remove_inode_hash(part->bd_inode);
662 		WARN_ON_ONCE(atomic_read(&part->bd_openers));
663 		invalidate_bdev(part);
664 		drop_partition(part);