Synnefo » snf-ganeti

def GrowBlockDevice(disk, amount):

  """Grow a stack of block devices.

  This function is called recursively, with the childrens being the

  first one resize.

  Args:

    disk: the disk to be grown

  Returns: a tuple of (status, result), with:

    status: the result (true/false) of the operation

    result: the error message if the operation failed, otherwise not used

  """

  r_dev = _RecursiveFindBD(disk)

  if r_dev is None:

    return False, "Cannot find block device %s" % (disk,)

  try:

    r_dev.Grow(amount)

  except errors.BlockDeviceError, err:

    return False, str(err)

  return True, None