540 static bool bd_may_claim(struct block_device *bdev, void *holder,  in bd_may_claim()  argument
551 		if (bdev->bd_holder == holder) {  in bd_may_claim()
582 int bd_prepare_to_claim(struct block_device *bdev, void *holder,  in bd_prepare_to_claim()  argument
587 	if (WARN_ON_ONCE(!holder))  in bd_prepare_to_claim()
592 	if (!bd_may_claim(bdev, holder, hops)) {  in bd_prepare_to_claim()
610 	whole->bd_claiming = holder;  in bd_prepare_to_claim()
616 static void bd_clear_claiming(struct block_device *whole, void *holder)  in bd_clear_claiming()  argument
620 	BUG_ON(whole->bd_claiming != holder);  in bd_clear_claiming()
634 static void bd_finish_claiming(struct block_device *bdev, void *holder,  in bd_finish_claiming()  argument
640 	BUG_ON(!bd_may_claim(bdev, holder, hops));  in bd_finish_claiming()
649 	bdev->bd_holder = holder;  in bd_finish_claiming()
652 	bd_clear_claiming(whole, holder);  in bd_finish_claiming()
665 void bd_abort_claiming(struct block_device *bdev, void *holder)  in bd_abort_claiming()  argument
668 	bd_clear_claiming(bdev_whole(bdev), holder);  in bd_abort_claiming()
673 static void bd_end_claim(struct block_device *bdev, void *holder)  in bd_end_claim()  argument
683 	WARN_ON_ONCE(bdev->bd_holder != holder);  in bd_end_claim()
782 int bdev_permission(dev_t dev, blk_mode_t mode, void *holder)  in bdev_permission()  argument
794 	if (mode & BLK_OPEN_RESTRICT_WRITES && !holder)  in bdev_permission()
801 	if (WARN_ON_ONCE(IS_ERR(holder)))  in bdev_permission()
926 int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,  in bdev_open()  argument
933 	if (holder) {  in bdev_open()
935 		ret = bd_prepare_to_claim(bdev, holder, hops);  in bdev_open()
961 	if (holder) {  in bdev_open()
962 		bd_finish_claiming(bdev, holder, hops);  in bdev_open()
991 	bdev_file->private_data = holder;  in bdev_open()
997 	if (holder)  in bdev_open()
998 		bd_abort_claiming(bdev, holder);  in bdev_open()
1034 struct file *bdev_file_open_by_dev(dev_t dev, blk_mode_t mode, void *holder,  in bdev_file_open_by_dev()  argument
1042 	ret = bdev_permission(dev, mode, holder);  in bdev_file_open_by_dev()
1059 	ret = bdev_open(bdev, mode, holder, hops, bdev_file);  in bdev_file_open_by_dev()
1071 				    void *holder,  in bdev_file_open_by_path()  argument
1082 	file = bdev_file_open_by_dev(dev, mode, holder, hops);  in bdev_file_open_by_path()
1097 	void *holder = bdev_file->private_data;  in bd_yield_claim()  local
1101 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(holder)))  in bd_yield_claim()
1105 		bd_end_claim(bdev, holder);  in bd_yield_claim()
1111 	void *holder = bdev_file->private_data;  in bdev_release()  local
1115 	if (IS_ERR(holder))  in bdev_release()
1131 	if (holder)  in bdev_release()