64 static const char *read_super(struct cache_sb *sb, struct block_device *bdev,  in read_super()  argument
69 	struct buffer_head *bh = __bread(bdev, 1, SB_SIZE);  in read_super()
119 	if (sb->block_size << 9 < bdev_logical_block_size(bdev))  in read_super()
159 		if (get_capacity(bdev->bd_disk) < sb->bucket_size * sb->nbuckets)  in read_super()
260 	bio->bi_bdev	= dc->bdev;  in bch_write_bdev_super()
306 		bio->bi_bdev	= ca->bdev;  in bcache_write_super()
509 	bio->bi_bdev		= ca->bdev;  in prio_io()
669 			bd_unlink_disk_holder(ca->bdev, d->disk);  in bcache_device_unlink()
680 		bd_link_disk_holder(ca->bdev, d->disk);  in bcache_device_link()
832 		sectors += bdev_sectors(dc->bdev);  in calc_cached_dev_sectors()
869 	bd_link_disk_holder(dc->bdev, dc->disk.disk);  in bch_cached_dev_run()
907 	pr_info("Caching disabled for %s", bdevname(dc->bdev, buf));  in cached_dev_detach_finish()
939 	bdevname(dc->bdev, buf);  in bch_cached_dev_attach()
1039 		bdevname(dc->bdev, buf), dc->disk.disk->disk_name,  in bch_cached_dev_attach()
1063 		bd_unlink_disk_holder(dc->bdev, dc->disk.disk);  in cached_dev_free()
1069 	if (!IS_ERR_OR_NULL(dc->bdev))  in cached_dev_free()
1070 		blkdev_put(dc->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);  in cached_dev_free()
1096 	struct request_queue *q = bdev_get_queue(dc->bdev);  in cached_dev_init()
1123 			 dc->bdev->bd_part->nr_sects - dc->sb.data_offset);  in cached_dev_init()
1128 		     dc->bdev->bd_part->nr_sects - dc->sb.data_offset);  in cached_dev_init()
1142 				 struct block_device *bdev,  in register_bdev()  argument
1150 	dc->bdev = bdev;  in register_bdev()
1151 	dc->bdev->bd_holder = dc;  in register_bdev()
1163 	if (kobject_add(&dc->disk.kobj, &part_to_dev(bdev->bd_part)->kobj,  in register_bdev()
1169 	pr_info("registered backing device %s", bdevname(bdev, name));  in register_bdev()
1181 	pr_notice("error opening %s: %s", bdevname(bdev, name), err);  in register_bdev()
1799 	if (!IS_ERR_OR_NULL(ca->bdev))  in bch_cache_release()
1800 		blkdev_put(ca->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);  in bch_cache_release()
1842 				struct block_device *bdev, struct cache *ca)  in register_cache()  argument
1849 	ca->bdev = bdev;  in register_cache()
1850 	ca->bdev->bd_holder = ca;  in register_cache()
1858 	if (blk_queue_discard(bdev_get_queue(ca->bdev)))  in register_cache()
1865 	if (kobject_add(&ca->kobj, &part_to_dev(bdev->bd_part)->kobj, "bcache")) {  in register_cache()
1880 	pr_info("registered cache device %s", bdevname(bdev, name));  in register_cache()
1887 		pr_notice("error opening %s: %s", bdevname(bdev, name), err);  in register_cache()
1900 static bool bch_is_open_backing(struct block_device *bdev) {  in bch_is_open_backing()  argument
1906 			if (dc->bdev == bdev)  in bch_is_open_backing()
1909 		if (dc->bdev == bdev)  in bch_is_open_backing()
1914 static bool bch_is_open_cache(struct block_device *bdev) {  in bch_is_open_cache()  argument
1921 			if (ca->bdev == bdev)  in bch_is_open_cache()
1926 static bool bch_is_open(struct block_device *bdev) {  in bch_is_open()  argument
1927 	return bch_is_open_cache(bdev) || bch_is_open_backing(bdev);  in bch_is_open()
1937 	struct block_device *bdev = NULL;  in register_bcache()  local
1948 	bdev = blkdev_get_by_path(strim(path),  in register_bcache()
1951 	if (IS_ERR(bdev)) {  in register_bcache()
1952 		if (bdev == ERR_PTR(-EBUSY)) {  in register_bcache()
1953 			bdev = lookup_bdev(strim(path));  in register_bcache()
1955 			if (!IS_ERR(bdev) && bch_is_open(bdev))  in register_bcache()
1967 	if (set_blocksize(bdev, 4096))  in register_bcache()
1970 	err = read_super(sb, bdev, &sb_page);  in register_bcache()
1980 		register_bdev(sb, sb_page, bdev, dc);  in register_bcache()
1987 		if (register_cache(sb, sb_page, bdev, ca) != 0)  in register_bcache()
1999 	blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);  in register_bcache()