XFS_INO_TO_OFFSET
offset = XFS_INO_TO_OFFSET(mp, ino);
XFS_INO_TO_OFFSET(mp, ino);
imap.im_boffset = XFS_INO_TO_OFFSET(mp, irec->ir_startino) <<
XFS_INO_TO_OFFSET(mp, irec->ir_startino +
cluster_buf_base = XFS_INO_TO_OFFSET(mp, cluster_ag_base);