xfs_blen_to_rtbxlen
rtxlen = xfs_blen_to_rtbxlen(mp, del->br_blockcount);
rtb->rextents = xfs_blen_to_rtbxlen(mp, mp->m_sb.sb_rblocks);
rts->rextents = xfs_blen_to_rtbxlen(mp, mp->m_sb.sb_rblocks);
error = xfs_dec_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
xfs_add_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
xfs_blen_to_rtbxlen(mp, data_delta),
nmp->m_sb.sb_rextents = xfs_blen_to_rtbxlen(nmp, nmp->m_sb.sb_rblocks);