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# Copyright (c) 2018 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. 
#

"""
  VDOService - manages the VDO service on the local node

  $Id: //eng/vdo-releases/magnesium/src/python/vdo/vdomgmnt/VDOService.py#35 $

"""

from . import ArgumentError
from . import Constants
from . import Defaults
from . import MgmntLogger, MgmntUtils
from . import Service, ServiceError
from . import SizeString
from . import VDOKernelModuleService
from . import DeveloperExitStatus, StateExitStatus
from . import SystemExitStatus, UserExitStatus
from utils import Command, CommandError, runCommand
from utils import Transaction, transactional

import functools
import locale
import math
import os
import re
from socket import gethostbyname
import stat
import time
import yaml

########################################################################
class VDOServiceError(ServiceError):
  """Base class for VDO service exceptions.
  """
  ######################################################################
  # Overriden methods
  ######################################################################
  def __init__(self, msg = _("VDO volume error"), *args, **kwargs):
    super(VDOServiceError, self).__init__(msg, *args, **kwargs)

########################################################################
class VDODeviceAlreadyConfiguredError(UserExitStatus, VDOServiceError):
  """The specified device is already configured for a VDO.
  """
  ######################################################################
  # Overriden methods
  ######################################################################
  def __init__(self, msg = _("Device already configured"), *args, **kwargs):
    super(VDODeviceAlreadyConfiguredError, self).__init__(msg, *args, **kwargs)

########################################################################
class VDOServiceExistsError(UserExitStatus, VDOServiceError):
  """VDO service exists exception.
  """
  ######################################################################
  # Overriden methods
  ######################################################################
  def __init__(self, msg = _("VDO volume exists"), *args, **kwargs):
    super(VDOServiceExistsError, self).__init__(msg, *args, **kwargs)

########################################################################
class VDOMissingDeviceError(StateExitStatus, VDOServiceError):
  """VDO underlying device does not exist exception.
  """
  ######################################################################
  # Overriden methods
  ######################################################################
  def __init__(self, msg = _("Underlying device does not exist"),
               *args, **kwargs):
    super(VDOMissingDeviceError, self).__init__(msg, *args, **kwargs)

########################################################################
class VDOServicePreviousOperationError(StateExitStatus, VDOServiceError):
  """VDO volume previous operation was not completed.
  """
  ######################################################################
  # Overriden methods
  ######################################################################
  def __init__(self, msg = _("VDO volume previous operation is incomplete"),
               *args, **kwargs):
    super(VDOServicePreviousOperationError, self).__init__(msg,