557 static bool bd_may_claim(struct block_device *bdev, void *holder,  in bd_may_claim()  argument
568 		if (bdev->bd_holder == holder) {  in bd_may_claim()
599 int bd_prepare_to_claim(struct block_device *bdev, void *holder,  in bd_prepare_to_claim()  argument
604 	if (WARN_ON_ONCE(!holder))  in bd_prepare_to_claim()
609 	if (!bd_may_claim(bdev, holder, hops)) {  in bd_prepare_to_claim()
627 	whole->bd_claiming = holder;  in bd_prepare_to_claim()
633 static void bd_clear_claiming(struct block_device *whole, void *holder)  in bd_clear_claiming()  argument
637 	BUG_ON(whole->bd_claiming != holder);  in bd_clear_claiming()
651 static void bd_finish_claiming(struct block_device *bdev, void *holder,  in bd_finish_claiming()  argument
657 	BUG_ON(!bd_may_claim(bdev, holder, hops));  in bd_finish_claiming()
666 	bdev->bd_holder = holder;  in bd_finish_claiming()
669 	bd_clear_claiming(whole, holder);  in bd_finish_claiming()
682 void bd_abort_claiming(struct block_device *bdev, void *holder)  in bd_abort_claiming()  argument
685 	bd_clear_claiming(bdev_whole(bdev), holder);  in bd_abort_claiming()
690 static void bd_end_claim(struct block_device *bdev, void *holder)  in bd_end_claim()  argument
700 	WARN_ON_ONCE(bdev->bd_holder != holder);  in bd_end_claim()
799 int bdev_permission(dev_t dev, blk_mode_t mode, void *holder)  in bdev_permission()  argument
811 	if (mode & BLK_OPEN_RESTRICT_WRITES && !holder)  in bdev_permission()
818 	if (WARN_ON_ONCE(IS_ERR(holder)))  in bdev_permission()
943 int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,  in bdev_open()  argument
950 	if (holder) {  in bdev_open()
952 		ret = bd_prepare_to_claim(bdev, holder, hops);  in bdev_open()
978 	if (holder) {  in bdev_open()
979 		bd_finish_claiming(bdev, holder, hops);  in bdev_open()
1008 	bdev_file->private_data = holder;  in bdev_open()
1014 	if (holder)  in bdev_open()
1015 		bd_abort_claiming(bdev, holder);  in bdev_open()
1051 struct file *bdev_file_open_by_dev(dev_t dev, blk_mode_t mode, void *holder,  in bdev_file_open_by_dev()  argument
1059 	ret = bdev_permission(dev, mode, holder);  in bdev_file_open_by_dev()
1076 	ret = bdev_open(bdev, mode, holder, hops, bdev_file);  in bdev_file_open_by_dev()
1088 				    void *holder,  in bdev_file_open_by_path()  argument
1099 	file = bdev_file_open_by_dev(dev, mode, holder, hops);  in bdev_file_open_by_path()
1114 	void *holder = bdev_file->private_data;  in bd_yield_claim()  local
1118 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(holder)))  in bd_yield_claim()
1122 		bd_end_claim(bdev, holder);  in bd_yield_claim()
1128 	void *holder = bdev_file->private_data;  in bdev_release()  local
1132 	if (IS_ERR(holder))  in bdev_release()
1148 	if (holder)  in bdev_release()