xfs_trans_reserve_more
error = xfs_trans_reserve_more(sc->tp, maxlen, 0);
error = xfs_trans_reserve_more(sc->tp, 0, maxrtx);
error = xfs_trans_reserve_more(sc->tp, XFS_QM_DQALLOC_SPACE_RES(mp),
error = xfs_trans_reserve_more(sc->tp, blocks, 0);
error = xfs_trans_reserve_more(sc->tp, tx->req.resblks, 0);
error = xfs_trans_reserve_more(tp, dblocks, rtx);
int xfs_trans_reserve_more(struct xfs_trans *tp,