xfs_fsblock_t     100 fs/xfs/xfs_types.h typedef	__uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
xfs_fsblock_t     105 fs/xfs/xfs_types.h typedef	__uint32_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */