XFS_DAENTER_BLOCKS
(XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
(XFS_DAENTER_BLOCKS(mp,w) + XFS_DAENTER_BMAPS(mp,w))