#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2014-2016 Wojtek Porczyk <woju@invisiblethingslab.com>
# Copyright (C) 2016 Marek Marczykowski <marmarek@invisiblethingslab.com>)
# Copyright (C) 2016 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <https://www.gnu.org/licenses/>.
#
''' This module contains the AppVM implementation '''
import copy
import qubes.events
import qubes.vm.qubesvm
import qubes.vm.mix.dvmtemplate
from qubes.config import defaults
[docs]
def template_changed_update_storage(self):
'''Update storage configuration for TemplateVM changes'''
for volume_name, conf in self.default_volume_config.items():
if conf.get('snap_on_start', False) and \
conf.get('source', None) is None:
config = conf.copy()
self.volume_config[volume_name] = config
self.storage.init_volume(volume_name, config)
[docs]
class AppVM(qubes.vm.mix.dvmtemplate.DVMTemplateMixin,
qubes.vm.qubesvm.QubesVM):
'''Application VM'''
template = qubes.VMProperty('template',
load_stage=4,
vmclass=qubes.vm.templatevm.TemplateVM,
doc='Template, on which this AppVM is based.')
default_volume_config = {
'root': {
'name': 'root',
'snap_on_start': True,
'save_on_stop': False,
'rw': True,
'source': None,
},
'private': {
'name': 'private',
'snap_on_start': False,
'save_on_stop': True,
'rw': True,
'size': defaults['private_img_size'],
},
'volatile': {
'name': 'volatile',
'snap_on_start': False,
'save_on_stop': False,
'size': defaults['root_img_size'],
'rw': True,
},
'kernel': {
'name': 'kernel',
'snap_on_start': False,
'save_on_stop': False,
'rw': False,
}
}
def __init__(self, app, xml, **kwargs):
# migrate renamed properties
if xml is not None:
node_dispvm_allowed = xml.find(
'./properties/property[@name=\'dispvm_allowed\']')
if node_dispvm_allowed is not None:
kwargs['template_for_dispvms'] = \
qubes.property.bool(None, None, node_dispvm_allowed.text)
node_dispvm_allowed.getparent().remove(node_dispvm_allowed)
self.volume_config = copy.deepcopy(self.default_volume_config)
template = kwargs.get('template', None)
if template is not None:
# template is only passed if the AppVM is created, in other cases we
# don't need to patch the volume_config because the config is
# coming from XML, already as we need it
for name, config in template.volume_config.items():
# in case the template vm has more volumes add them to own
# config
if name not in self.volume_config:
self.volume_config[name] = config.copy()
if 'vid' in self.volume_config[name]:
del self.volume_config[name]['vid']
super().__init__(app, xml, **kwargs)
@qubes.stateless_property
def icon(self):
if self.template_for_dispvms:
return 'templatevm-' + self.label.name
# multi-inheritance and properties confuses pylint here
# pylint: disable=no-member
return super().icon
[docs]
@qubes.events.handler('domain-load')
def on_domain_loaded(self, event):
''' When domain is loaded assert that this vm has a template.
''' # pylint: disable=unused-argument
assert self.template
[docs]
@qubes.events.handler('property-pre-reset:template')
def on_property_pre_reset_template(self, event, name, oldvalue=None):
'''Forbid deleting template of running VM
''' # pylint: disable=unused-argument
raise qubes.exc.QubesValueError('Cannot unset template')
[docs]
@qubes.events.handler('property-pre-set:template')
def on_property_pre_set_template(self, event, name, newvalue,
oldvalue=None):
'''Forbid changing template of running VM
''' # pylint: disable=unused-argument
if not self.is_halted():
raise qubes.exc.QubesVMNotHaltedError(self,
'Cannot change template while qube is running')
[docs]
@qubes.events.handler('property-set:template')
def on_property_set_template(self, event, name, newvalue, oldvalue=None):
''' Adjust root (and possibly other snap_on_start=True) volume
on template change.
''' # pylint: disable=unused-argument
template_changed_update_storage(self)
for vm in self.dispvms:
vm.on_property_set_template(event, name, newvalue, oldvalue)