73 lines
2.7 KiB
Python
73 lines
2.7 KiB
Python
# -*- encoding: utf-8 -*-
|
|
#
|
|
# The Qubes OS Project, http://www.qubes-os.org
|
|
#
|
|
# Copyright (C) 2017 Marek Marczykowski-Górecki
|
|
# <marmarek@invisiblethingslab.com>
|
|
#
|
|
# 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, see <http://www.gnu.org/licenses/>.
|
|
|
|
import qubes.events
|
|
|
|
class DVMTemplateMixin(qubes.events.Emitter):
|
|
'''VM class capable of being DVM template'''
|
|
|
|
template_for_dispvms = qubes.property('template_for_dispvms',
|
|
type=bool,
|
|
default=False,
|
|
doc='Should this VM be allowed to start as Disposable VM')
|
|
|
|
@qubes.events.handler('property-pre-set:template_for_dispvms')
|
|
def __on_pre_set_dvmtemplate(self, event, name,
|
|
newvalue, oldvalue=None):
|
|
# pylint: disable=unused-argument
|
|
if newvalue:
|
|
return
|
|
if any(self.dispvms):
|
|
raise qubes.exc.QubesVMInUseError(self,
|
|
'Cannot change template_for_dispvms to False while there are '
|
|
'some DispVMs based on this DVM template')
|
|
|
|
@qubes.events.handler('property-pre-del:template_for_dispvms')
|
|
def __on_pre_del_dvmtemplate(self, event, name,
|
|
oldvalue=None):
|
|
self.__on_pre_set_dvmtemplate(
|
|
event, name, False, oldvalue)
|
|
|
|
@qubes.events.handler('property-pre-set:template')
|
|
def __on_pre_property_set_template(self, event, name, newvalue,
|
|
oldvalue=None):
|
|
# pylint: disable=unused-argument
|
|
for vm in self.dispvms:
|
|
if vm.is_running:
|
|
raise qubes.exc.QubesVMNotHaltedError(self,
|
|
'Cannot change template while there are running DispVMs'
|
|
'based on this DVM template')
|
|
|
|
@qubes.events.handler('property-set:template')
|
|
def __on_property_set_template(self, event, name, newvalue,
|
|
oldvalue=None):
|
|
# pylint: disable=unused-argument
|
|
for vm in self.dispvms:
|
|
vm.on_property_set_template(event, name, newvalue, oldvalue)
|
|
|
|
@property
|
|
def dispvms(self):
|
|
''' Returns a generator containing all Disposable VMs based on the
|
|
current AppVM.
|
|
'''
|
|
for vm in self.app.domains:
|
|
if getattr(vm, 'template', None) == self:
|
|
yield vm
|