1108 	struct gendisk *disk = get_gendisk(bdev->bd_dev, partno);  in bdev_get_gendisk()  local
1110 	if (!disk)  in bdev_get_gendisk()
1121 		put_disk_and_module(disk);  in bdev_get_gendisk()
1124 	return disk;  in bdev_get_gendisk()
1184 	struct gendisk		*disk;  member
1189 						  struct gendisk *disk)  in bd_find_holder_disk()  argument
1194 		if (holder->disk == disk)  in bd_find_holder_disk()
1210  * bd_link_disk_holder - create symlinks between holding disk and slave bdev
1212  * @disk: the holding disk
1218  * - from "slaves" directory of the holder @disk to the claimed @bdev
1219  * - from "holders" directory of the @bdev to the holder @disk
1221  * For example, if /dev/dm-0 maps to /dev/sda and disk for dm-0 is
1228  * ensure that both @bdev and @disk are valid during the creation and
1237 int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk)  in bd_link_disk_holder()  argument
1247 	if (WARN_ON(!disk->slave_dir || !bdev->bd_part->holder_dir))  in bd_link_disk_holder()
1250 	holder = bd_find_holder_disk(bdev, disk);  in bd_link_disk_holder()
1263 	holder->disk = disk;  in bd_link_disk_holder()
1266 	ret = add_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj);  in bd_link_disk_holder()
1270 	ret = add_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj);  in bd_link_disk_holder()
1283 	del_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj);  in bd_link_disk_holder()
1295  * @disk: the holding disk
1302 void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk)  in bd_unlink_disk_holder()  argument
1308 	holder = bd_find_holder_disk(bdev, disk);  in bd_unlink_disk_holder()
1311 		del_symlink(disk->slave_dir, &part_to_dev(bdev->bd_part)->kobj);  in bd_unlink_disk_holder()
1313 			    &disk_to_dev(disk)->kobj);  in bd_unlink_disk_holder()
1325  * check_disk_size_change - checks for disk size change and adjusts bdev size.
1326  * @disk: struct gendisk to check
1330  * This routine checks to see if the bdev size does not match the disk size
1334 static void check_disk_size_change(struct gendisk *disk,  in check_disk_size_change()  argument
1340 	disk_size = (loff_t)get_capacity(disk) << 9;  in check_disk_size_change()
1346 			       disk->disk_name, bdev_size, disk_size);  in check_disk_size_change()
1354 			pr_warn("VFS: busy inodes on resized disk %s\n",  in check_disk_size_change()
1355 				disk->disk_name);  in check_disk_size_change()
1360  * revalidate_disk_size - checks for disk size change and adjusts bdev size.
1361  * @disk: struct gendisk to check
1364  * This routine checks to see if the bdev size does not match the disk size
1368 void revalidate_disk_size(struct gendisk *disk, bool verbose)  in revalidate_disk_size()  argument
1376 	if (disk->flags & GENHD_FL_HIDDEN)  in revalidate_disk_size()
1379 	bdev = bdget_disk(disk, 0);  in revalidate_disk_size()
1381 		check_disk_size_change(disk, bdev, verbose);  in revalidate_disk_size()
1399 	struct gendisk *disk = bdev->bd_disk;  in bdev_disk_changed()  local
1404 	if (!(disk->flags & GENHD_FL_UP))  in bdev_disk_changed()
1412 	clear_bit(GD_NEED_PART_SCAN, &disk->state);  in bdev_disk_changed()
1423 		if (disk_part_scan_enabled(disk) ||  in bdev_disk_changed()
1424 		    !(disk->flags & GENHD_FL_REMOVABLE))  in bdev_disk_changed()
1425 			set_capacity(disk, 0);  in bdev_disk_changed()
1427 		if (disk->fops->revalidate_disk)  in bdev_disk_changed()
1428 			disk->fops->revalidate_disk(disk);  in bdev_disk_changed()
1431 	check_disk_size_change(disk, bdev, !invalidate);  in bdev_disk_changed()
1433 	if (get_capacity(disk)) {  in bdev_disk_changed()
1434 		ret = blk_add_partitions(disk, bdev);  in bdev_disk_changed()
1442 		kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);  in bdev_disk_changed()
1464 	struct gendisk *disk;  in __blkdev_get()  local
1472 	disk = bdev_get_gendisk(bdev, &partno);  in __blkdev_get()
1473 	if (!disk)  in __blkdev_get()
1477 		whole = bdget_disk(disk, 0);  in __blkdev_get()
1495 	disk_block_events(disk);  in __blkdev_get()
1499 		bdev->bd_disk = disk;  in __blkdev_get()
1505 			bdev->bd_part = disk_get_part(disk, partno);  in __blkdev_get()
1510 			if (disk->fops->open) {  in __blkdev_get()
1511 				ret = disk->fops->open(bdev, mode);  in __blkdev_get()
1513 				 * If we lost a race with 'disk' being deleted,  in __blkdev_get()
1521 				bd_set_nr_sectors(bdev, get_capacity(disk));  in __blkdev_get()
1531 			if (test_bit(GD_NEED_PART_SCAN, &disk->state) &&  in __blkdev_get()
1543 			bdev->bd_part = disk_get_part(disk, partno);  in __blkdev_get()
1544 			if (!(disk->flags & GENHD_FL_UP) ||  in __blkdev_get()
1554 			bdev->bd_bdi = bdi_get(disk->queue->backing_dev_info);  in __blkdev_get()
1561 			if (test_bit(GD_NEED_PART_SCAN, &disk->state) &&  in __blkdev_get()
1581 	    (disk->flags & GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE)) {  in __blkdev_get()
1588 		disk_unblock_events(disk);  in __blkdev_get()
1590 	/* only one opener holds refs to the module and disk */  in __blkdev_get()
1592 		put_disk_and_module(disk);  in __blkdev_get()
1608 	disk_unblock_events(disk);  in __blkdev_get()
1613 	put_disk_and_module(disk);  in __blkdev_get()
1773 	struct gendisk *disk = bdev->bd_disk;  in __blkdev_put()  local
1798 		if (disk->fops->release)  in __blkdev_put()
1799 			disk->fops->release(disk, mode);  in __blkdev_put()
1809 		put_disk_and_module(disk);  in __blkdev_put()