XFS_BNO_BLOCK
rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
agf->agf_bno_root = cpu_to_be32(XFS_BNO_BLOCK(mp));
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
#define XFS_CNT_BLOCK(mp) ((xfs_agblock_t)(XFS_BNO_BLOCK(mp) + 1))