741 static int open_table_device(struct table_device *td, dev_t dev,  in open_table_device()  argument
749 	BUG_ON(td->dm_dev.bdev);  in open_table_device()
751 	bdev = blkdev_get_by_dev(dev, td->dm_dev.mode | FMODE_EXCL, _claim_ptr);  in open_table_device()
757 		blkdev_put(bdev, td->dm_dev.mode | FMODE_EXCL);  in open_table_device()
761 	td->dm_dev.bdev = bdev;  in open_table_device()
768 static void close_table_device(struct table_device *td, struct mapped_device *md)  in close_table_device()  argument
770 	if (!td->dm_dev.bdev)  in close_table_device()
773 	bd_unlink_disk_holder(td->dm_dev.bdev, dm_disk(md));  in close_table_device()
774 	blkdev_put(td->dm_dev.bdev, td->dm_dev.mode | FMODE_EXCL);  in close_table_device()
775 	td->dm_dev.bdev = NULL;  in close_table_device()
780 	struct table_device *td;  in find_table_device()  local
782 	list_for_each_entry(td, l, list)  in find_table_device()
783 		if (td->dm_dev.bdev->bd_dev == dev && td->dm_dev.mode == mode)  in find_table_device()
784 			return td;  in find_table_device()
792 	struct table_device *td;  in dm_get_table_device()  local
795 	td = find_table_device(&md->table_devices, dev, mode);  in dm_get_table_device()
796 	if (!td) {  in dm_get_table_device()
797 		td = kmalloc(sizeof(*td), GFP_KERNEL);  in dm_get_table_device()
798 		if (!td) {  in dm_get_table_device()
803 		td->dm_dev.mode = mode;  in dm_get_table_device()
804 		td->dm_dev.bdev = NULL;  in dm_get_table_device()
806 		if ((r = open_table_device(td, dev, md))) {  in dm_get_table_device()
808 			kfree(td);  in dm_get_table_device()
812 		format_dev_t(td->dm_dev.name, dev);  in dm_get_table_device()
814 		atomic_set(&td->count, 0);  in dm_get_table_device()
815 		list_add(&td->list, &md->table_devices);  in dm_get_table_device()
817 	atomic_inc(&td->count);  in dm_get_table_device()
820 	*result = &td->dm_dev;  in dm_get_table_device()
827 	struct table_device *td = container_of(d, struct table_device, dm_dev);  in dm_put_table_device()  local
830 	if (atomic_dec_and_test(&td->count)) {  in dm_put_table_device()
831 		close_table_device(td, md);  in dm_put_table_device()
832 		list_del(&td->list);  in dm_put_table_device()
833 		kfree(td);  in dm_put_table_device()
844 		struct table_device *td = list_entry(tmp, struct table_device, list);  in free_table_devices()  local
847 		       td->dm_dev.name, atomic_read(&td->count));  in free_table_devices()
848 		kfree(td);  in free_table_devices()