#!/usr/bin/python2 # # The Qubes OS Project, http://www.qubes-os.org # # Copyright (C) 2010 Joanna Rutkowska # Copyright (C) 2013 Marek Marczykowski # # 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. # # import os import subprocess import sys from qubes.qubes import QubesVm,register_qubes_vm_class,dry_run from qubes.qubes import QubesVmCollection,QubesException,QubesVmLabels from qubes.qubes import defaults,system_path,vm_files class QubesTemplateVm(QubesVm): """ A class that represents an TemplateVM. A child of QubesVm. """ # In which order load this VM type from qubes.xml load_order = 50 def get_attrs_config(self): attrs_config = super(QubesTemplateVm, self).get_attrs_config() attrs_config['dir_path']['eval'] = 'value if value is not None else os.path.join(system_path["qubes_templates_dir"], self.name)' attrs_config['label']['default'] = defaults["template_label"] # New attributes # Image for template changes attrs_config['rootcow_img'] = { 'eval': 'os.path.join(self.dir_path, vm_files["rootcow_img"])' } # Clean image for root-cow and swap (AppVM side) attrs_config['clean_volatile_img'] = { 'eval': 'os.path.join(self.dir_path, vm_files["clean_volatile_img"])' } return attrs_config def __init__(self, **kwargs): super(QubesTemplateVm, self).__init__(**kwargs) self.appvms = QubesVmCollection() @property def type(self): return "TemplateVM" @property def updateable(self): return True def is_template(self): return True def get_firewall_defaults(self): return { "rules": list(), "allow": False, "allowDns": False, "allowIcmp": False, "allowYumProxy": True } def get_rootdev(self, source_template=None): return "'script:origin:{dir}/root.img:{dir}/root-cow.img,xvda,w',".format(dir=self.dir_path) def clone_disk_files(self, src_vm, verbose): if dry_run: return super(QubesTemplateVm, self).clone_disk_files(src_vm=src_vm, verbose=verbose) if verbose: print >> sys.stderr, "--> Copying the template's clean volatile image:\n{0} ==>\n{1}".\ format(src_vm.clean_volatile_img, self.clean_volatile_img) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", src_vm.clean_volatile_img, self.clean_volatile_img]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_vm.clean_volatile_img, self.clean_volatile_img)) if verbose: print >> sys.stderr, "--> Copying the template's volatile image:\n{0} ==>\n{1}".\ format(self.clean_volatile_img, self.volatile_img) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", self.clean_volatile_img, self.volatile_img]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(self.clean_img, self.volatile_img)) # Create root-cow.img self.commit_changes(verbose=verbose) def post_rename(self, old_name): old_dirpath = os.path.join(os.path.dirname(self.dir_path), old_name) self.clean_volatile_img = self.clean_volatile_img.replace(old_dirpath, self.dir_path) self.rootcow_img = self.rootcow_img.replace(old_dirpath, self.dir_path) def verify_files(self): if dry_run: return if not os.path.exists (self.dir_path): raise QubesException ( "VM directory doesn't exist: {0}".\ format(self.dir_path)) if not os.path.exists (self.root_img): raise QubesException ( "VM root image file doesn't exist: {0}".\ format(self.root_img)) if not os.path.exists (self.private_img): raise QubesException ( "VM private image file doesn't exist: {0}".\ format(self.private_img)) if not os.path.exists (self.volatile_img): raise QubesException ( "VM volatile image file doesn't exist: {0}".\ format(self.volatile_img)) if not os.path.exists (self.clean_volatile_img): raise QubesException ( "Clean VM volatile image file doesn't exist: {0}".\ format(self.clean_volatile_img)) if not os.path.exists (self.kernels_dir): raise QubesException ( "VM's kernels directory does not exist: {0}".\ format(self.kernels_dir)) return True def reset_volatile_storage(self, verbose = False): assert not self.is_running(), "Attempt to clean volatile image of running Template VM!" if verbose: print >> sys.stderr, "--> Cleaning volatile image: {0}...".format (self.volatile_img) if dry_run: return if os.path.exists (self.volatile_img): os.remove (self.volatile_img) retcode = subprocess.call (["tar", "xf", self.clean_volatile_img, "-C", self.dir_path]) if retcode != 0: raise IOError ("Error while unpacking {0} to {1}".\ format(self.template.clean_volatile_img, self.volatile_img)) def commit_changes (self, verbose = False): assert not self.is_running(), "Attempt to commit changes on running Template VM!" if verbose: print >> sys.stderr, "--> Commiting template updates... COW: {0}...".format (self.rootcow_img) if dry_run: return if os.path.exists (self.rootcow_img): os.rename (self.rootcow_img, self.rootcow_img + '.old') f_cow = open (self.rootcow_img, "w") f_root = open (self.root_img, "r") f_root.seek(0, os.SEEK_END) f_cow.truncate (f_root.tell()) # make empty sparse file of the same size as root.img f_cow.close () f_root.close() register_qubes_vm_class(QubesTemplateVm)