Synnefo » snf-ganeti

    if not constants.DRBD_BARRIERS: # disable barriers, if configured so

      version = cls._GetVersion()

      # various DRBD versions support different disk barrier options;

      # what we aim here is to revert back to the 'drain' method of

      # disk flushes and to disable metadata barriers, in effect going

      # back to pre-8.0.7 behaviour

      vmaj = version['k_major']

      vmin = version['k_minor']

      vrel = version['k_point']

      assert vmaj == 8

      if vmin == 0: # 8.0.x

        if vrel >= 12:

          args.extend(['-i', '-m'])

      elif vmin == 2: # 8.2.x

        if vrel >= 7:

          args.extend(['-i', '-m'])

      elif vmaj >= 3: # 8.3.x or newer

        args.extend(['-i', '-a', 'm'])