283 lines
10 KiB
Python
283 lines
10 KiB
Python
#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2016 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <https://www.gnu.org/licenses/>.
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#
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import ast
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import xml.parsers.expat
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import lxml.etree
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import qubes
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import qubes.devices
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import qubes.vm.appvm
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import qubes.vm.standalonevm
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import qubes.vm.templatevm
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import qubes.vm.adminvm
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import qubes.ext.r3compatibility
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class AppVM(qubes.vm.appvm.AppVM): # pylint: disable=too-many-ancestors
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"""core2 compatibility AppVM class, with variable dir_path"""
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dir_path = qubes.property('dir_path',
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# pylint: disable=undefined-variable
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default=(lambda self: super(AppVM, self).dir_path),
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saver=qubes.property.dontsave,
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doc="VM storage directory",
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)
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def is_running(self):
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return False
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class StandaloneVM(qubes.vm.standalonevm.StandaloneVM):
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"""core2 compatibility StandaloneVM class, with variable dir_path
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""" # pylint: disable=too-many-ancestors
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dir_path = qubes.property('dir_path',
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# pylint: disable=undefined-variable
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default=(lambda self: super(StandaloneVM, self).dir_path),
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saver=qubes.property.dontsave,
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doc="VM storage directory")
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def is_running(self):
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return False
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class Core2Qubes(qubes.Qubes):
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def __init__(self, store=None, load=True, **kwargs):
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if store is None:
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raise ValueError("store path required")
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super(Core2Qubes, self).__init__(store, load, **kwargs)
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def load_default_template(self, element):
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default_template = element.get("default_template")
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self.default_template = int(default_template) \
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if default_template.lower() != "none" else None
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def load_globals(self, element):
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default_netvm = element.get("default_netvm")
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if default_netvm is not None:
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self.default_netvm = int(default_netvm) \
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if default_netvm != "None" else None
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updatevm = element.get("updatevm")
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if updatevm is not None:
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self.updatevm = int(updatevm) \
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if updatevm != "None" else None
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clockvm = element.get("clockvm")
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if clockvm is not None:
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self.clockvm = int(clockvm) \
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if clockvm != "None" else None
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def set_netvm_dependency(self, element):
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kwargs = {}
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attr_list = ("qid", "uses_default_netvm", "netvm_qid")
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for attribute in attr_list:
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kwargs[attribute] = element.get(attribute)
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vm = self.domains[int(kwargs["qid"])]
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if element.get("uses_default_netvm") is None:
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uses_default_netvm = True
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else:
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uses_default_netvm = (
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True if element.get("uses_default_netvm") == "True" else False)
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if not uses_default_netvm:
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netvm_qid = element.get("netvm_qid")
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if netvm_qid is None or netvm_qid == "none":
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vm.netvm = None
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else:
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vm.netvm = int(netvm_qid)
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def set_dispvm_netvm_dependency(self, element):
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kwargs = {}
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attr_list = ("qid", "uses_default_netvm", "netvm_qid")
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for attribute in attr_list:
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kwargs[attribute] = element.get(attribute)
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vm = self.domains[int(kwargs["qid"])]
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if element.get("uses_default_dispvm_netvm") is None:
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uses_default_dispvm_netvm = True
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else:
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uses_default_dispvm_netvm = (
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True if element.get("uses_default_dispvm_netvm") == "True"
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else False)
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if not uses_default_dispvm_netvm:
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dispvm_netvm_qid = element.get("dispvm_netvm_qid")
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if dispvm_netvm_qid is None or dispvm_netvm_qid == "none":
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dispvm_netvm = None
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else:
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dispvm_netvm = self.domains[int(dispvm_netvm_qid)]
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else:
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dispvm_netvm = vm.netvm
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if dispvm_netvm:
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dispvm_tpl_name = 'disp-{}'.format(dispvm_netvm.name)
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else:
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dispvm_tpl_name = 'disp-no-netvm'
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if dispvm_tpl_name not in self.domains:
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vm = self.add_new_vm(qubes.vm.appvm.AppVM,
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name=dispvm_tpl_name)
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# TODO: add support for #2075
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# TODO: set qrexec policy based on dispvm_netvm value
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def import_core2_vm(self, element):
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vm_class_name = element.tag
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try:
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kwargs = {}
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if vm_class_name in ["QubesTemplateVm", "QubesTemplateHVm"]:
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vm_class = qubes.vm.templatevm.TemplateVM
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elif element.get('template_qid').lower() == "none":
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kwargs['dir_path'] = element.get('dir_path')
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vm_class = StandaloneVM
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else:
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kwargs['dir_path'] = element.get('dir_path')
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kwargs['template'] = self.domains[int(element.get(
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'template_qid'))]
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vm_class = AppVM
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# simple attributes
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for attr, default in {
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'installed_by_rpm': 'False',
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'include_in_backups': 'True',
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'qrexec_timeout': '60',
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'internal': 'False',
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'label': None,
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'name': None,
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'vcpus': '2',
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'memory': '400',
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'maxmem': '4000',
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'default_user': 'user',
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'debug': 'False',
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'pci_strictreset': 'True',
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'mac': None,
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'autostart': 'False'}.items():
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value = element.get(attr)
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if value and value != default:
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kwargs[attr] = value
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# attributes with default value
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for attr in ["kernel", "kernelopts"]:
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value = element.get(attr)
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if value and value.lower() == "none":
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value = None
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value_is_default = element.get(
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"uses_default_{}".format(attr))
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if value_is_default and value_is_default.lower() != \
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"true":
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kwargs[attr] = value
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kwargs['virt_mode'] = 'hvm' if "HVm" in vm_class_name else 'pv'
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kwargs['provides_network'] = \
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vm_class_name in ('QubesNetVm', 'QubesProxyVm')
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if vm_class_name == 'QubesNetVm':
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kwargs['netvm'] = None
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vm = self.add_new_vm(vm_class,
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qid=int(element.get('qid')), **kwargs)
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services = element.get('services')
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if services:
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services = ast.literal_eval(services)
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else:
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services = {}
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for service, value in services.items():
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feature = service
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for repl_feature, repl_service in \
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qubes.ext.r3compatibility.\
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R3Compatibility.features_to_services.\
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items():
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if repl_service == service:
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feature = repl_feature
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vm.features[feature] = value
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for attr in ['backup_content', 'backup_path',
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'backup_size']:
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value = element.get(attr)
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vm.features[attr.replace('_', '-')] = value
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pcidevs = element.get('pcidevs')
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if pcidevs:
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pcidevs = ast.literal_eval(pcidevs)
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for pcidev in pcidevs:
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try:
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dev = self.domains[0].devices['pci'][pcidev]
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assignment = qubes.devices.DeviceAssignment(
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backend_domain=dev.backend_domain, ident=dev.ident)
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vm.devices["pci"].attach(assignment)
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except qubes.exc.QubesException as e:
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self.log.error("VM {}: {}".format(vm.name, str(e)))
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except (ValueError, LookupError) as err:
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self.log.error("import error ({1}): {2}".format(
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vm_class_name, err))
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if 'vm' in locals():
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del self.domains[vm]
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def load(self, lock=False):
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fh = self._acquire_lock()
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try:
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fh.seek(0)
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tree = lxml.etree.parse(fh)
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except (EnvironmentError, # pylint: disable=broad-except
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xml.parsers.expat.ExpatError) as err:
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self.log.error(err)
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return False
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self.load_initial_values()
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self.default_kernel = tree.getroot().get("default_kernel")
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vm_classes = ["TemplateVm", "TemplateHVm",
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"AppVm", "HVm", "NetVm", "ProxyVm"]
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# First load templates
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for vm_class_name in ["TemplateVm", "TemplateHVm"]:
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vms_of_class = tree.findall("Qubes" + vm_class_name)
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for element in vms_of_class:
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self.import_core2_vm(element)
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# Then set default template ...
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self.load_default_template(tree.getroot())
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# ... and load other VMs
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for vm_class_name in ["AppVm", "HVm", "NetVm", "ProxyVm"]:
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vms_of_class = tree.findall("Qubes" + vm_class_name)
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# first non-template based, then template based
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sorted_vms_of_class = sorted(vms_of_class,
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key=lambda x: str(x.get('template_qid')).lower() != "none")
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for element in sorted_vms_of_class:
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self.import_core2_vm(element)
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# After importing all VMs, set netvm references, in the same order
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for vm_class_name in vm_classes:
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for element in tree.findall("Qubes" + vm_class_name):
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try:
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self.set_netvm_dependency(element)
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except (ValueError, LookupError) as err:
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self.log.error("VM {}: failed to set netvm dependency: {}".
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format(element.get('name'), err))
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# and load other defaults (default netvm, updatevm etc)
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self.load_globals(tree.getroot())
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if not lock:
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self._release_lock()
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return True
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def save(self, lock=False):
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raise NotImplementedError("Saving old qubes.xml not supported")
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