構造体定義書 - virtual

struct virtual_item

No.	名称	属性	説明
1	virtual_item
	vi_type	unsigned short	item type, mergeability
	vi_item_len	unsigned short	length of item that it will have after balancing
	vi_item_offset	__u64	offset of item that it have before balancing
	vi_entry_count	short	number of entries in directory item
	vi_entry_sizes	unsigned short *	array of entry lengths for directory item

virtual_item