#!/usr/bin/python2.6 # # The Qubes OS Project, http://www.qubes-os.org # # Copyright (C) 2010 Joanna Rutkowska # # 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 sys import os import os.path import subprocess import xml.etree.ElementTree import xml.parsers.expat import fcntl import re import shutil # Do not use XenAPI or create/read any VM files # This is for testing only! dry_run = False #dry_run = True if not dry_run: # Xen API import xmlrpclib from xen.xm import XenAPI from xen.xend import sxp if dry_run: qubes_base_dir = "." else: qubes_base_dir = "/var/lib/qubes" qubes_appvms_dir = qubes_base_dir + "/appvms" qubes_templates_dir = qubes_base_dir + "/vm-templates" qubes_servicevms_dir = qubes_base_dir + "/servicevms" qubes_store_filename = qubes_base_dir + "/qubes.xml" qubes_max_qid = 254*254 qubes_max_netid = 254 vm_default_netmask = "255.255.0.0" default_root_img = "root.img" default_rootcow_img = "root-cow.img" default_swapcow_img = "swap-cow.img" default_private_img = "private.img" default_appvms_conf_file = "appvm-template.conf" default_templatevm_conf_template = "templatevm.conf" # needed for TemplateVM cloning default_appmenus_templates_subdir = "apps.templates" default_kernels_subdir = "kernels" # do not allow to start a new AppVM if Dom0 mem was to be less than this dom0_min_memory = 700*1024*1024 # We need this global reference, as each instance of QubesVM # must be able to ask Dom0 VM about how much memory it currently has... dom0_vm = None qubes_appmenu_create_cmd = "/usr/lib/qubes/create_apps_for_appvm.sh" qubes_appmenu_remove_cmd = "/usr/lib/qubes/remove_appvm_appmenus.sh" # TODO: we should detect the actual size of the AppVM's swap partition # rather than using this ugly hardcoded value, which was choosen here # as "should be good for everyone" swap_cow_sz = 1024*1024*1024 VM_TEMPLATE = 'TempleteVM' VM_APPVM = 'AppVM' VM_NETVM = 'NetVM' def get_xend_session_old_api(): from xen.xend import XendClient from xen.util.xmlrpcclient import ServerProxy xend_server = ServerProxy(XendClient.uri) return xend_server def get_xend_session_new_api(): xend_socket_uri = "httpu:///var/run/xend/xen-api.sock" session = XenAPI.Session (xend_socket_uri) session.login_with_password ("", "") return session class QubesException (Exception) : pass class QubesVmLabel(object): def __init__(self, name, color = None, icon = None): self.name = name self.color = color if color is not None else name self.icon = icon if icon is not None else name self.icon_path = "/usr/share/qubes/icons/" + self.icon + ".png" # Globally defined lables QubesVmLabels = { "yellow" : QubesVmLabel ("yellow"), "orange" : QubesVmLabel ("orange"), "red" : QubesVmLabel ("red"), "purple" : QubesVmLabel ("purple", color="0xb83374"), "green" : QubesVmLabel ("green", color="0x5fa05e"), "blue" : QubesVmLabel ("blue"), "gray" : QubesVmLabel ("gray"), "black" : QubesVmLabel ("black"), } default_appvm_label = QubesVmLabels["red"] default_template_label = QubesVmLabels["gray"] default_servicevm_label = QubesVmLabels["red"] class QubesVm(object): """ A representation of one Qubes VM Only persistent information are stored here, while all the runtime information, e.g. Xen dom id, etc, are to be retrieved via Xen API Note that qid is not the same as Xen's domid! """ def __init__(self, qid, name, type, dir_path, conf_file = None, uses_default_netvm = True, netvm_vm = None, installed_by_rpm = False, updateable = False, label = None): assert qid < qubes_max_qid, "VM id out of bounds!" self.__qid = qid self.name = name dir_path = dir_path self.dir_path = dir_path conf_file = conf_file if self.dir_path is not None: if (conf_file is None): self.conf_file = dir_path + "/" + name + ".conf" else: if os.path.isabs(conf_file): self.conf_file = conf_file else: self.conf_file = dir_path + "/" + conf_file self.__type = type self.uses_default_netvm = uses_default_netvm self.netvm_vm = netvm_vm # We use it in remove from disk to avoid removing rpm files (for templates and netvms) self.installed_by_rpm = installed_by_rpm self.updateable = updateable self.label = label if label is not None else QubesVmLabels["red"] self.icon_path = self.dir_path + "/icon.png" @property def qid(self): return self.__qid @property def type(self): return self.__type @property def ip(self): if self.netvm_vm is not None: return self.netvm_vm.get_ip_for_vm(self.qid) else: return None @property def netmask(self): if self.netvm_vm is not None: return self.netvm_vm.netmask else: return None @property def gateway(self): if self.netvm_vm is not None: return self.netvm_vm.gateway else: return None def is_updateable(self): return self.updateable def is_networked(self): if self.is_netvm(): return True if self.netvm_vm is not None: return True else: return False def set_nonupdateable(self): if not self.is_updateable(): return assert not self.is_running() # We can always downgrade a VM to non-updateable... self.updateable = False def is_templete(self): if self.type == VM_TEMPLATE: return True else: return False def is_appvm(self): if self.type == VM_APPVM: return True else: return False def is_netvm(self): if self.type == VM_NETVM: return True else: return False def add_to_xen_storage(self): if dry_run: return retcode = subprocess.call (["/usr/sbin/xm", "new", "-q", self.conf_file]) if retcode != 0: raise OSError ("Cannot add VM '{0}' to Xen Store!".format(self.name)) return True def remove_from_xen_storage(self): if dry_run: return retcode = subprocess.call (["/usr/sbin/xm", "delete", self.name]) if retcode != 0: raise OSError ("Cannot remove VM '{0}' from Xen Store!".format(self.name)) self.in_xen_storage = False def update_xen_storage(self): self.remove_from_xen_storage() self.add_to_xen_storage() def get_xid(self): if dry_run: return 666 session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] xid = int (session.xenapi.VM.get_domid (uuid)) return xid def get_mem(self): if dry_run: return 666 session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] metrics = session.xenapi.VM.get_metrics(uuid) mem = int (session.xenapi.VM_metrics.get_memory_actual (metrics)) return mem def get_mem_static_max(self): if dry_run: return 666 session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] mem = int(session.xenapi.VM.get_memory_static_max(uuid)) return mem def get_cpu_total_load(self): if dry_run: import random return random.random() * 100 session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] metrics = session.xenapi.VM.get_metrics(uuid) cpus_util = session.xenapi.VM_metrics.get_VCPUs_utilisation (metrics) if len (cpus_util) == 0: return 0 cpu_total_load = 0.0 for cpu in cpus_util: cpu_total_load += cpus_util[cpu] cpu_total_load /= len(cpus_util) p = 100*cpu_total_load if p > 100: p = 100 return p def get_power_state(self): if dry_run: return "NA" session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) if len (uuids) == 0: return "NA" uuid = uuids[0] power_state = session.xenapi.VM.get_power_state (uuid) return power_state def is_running(self): if self.get_power_state() == "Running": return True else: return False def get_disk_usage(self, file_or_dir): if not os.path.exists(file_or_dir): return 0 p = subprocess.Popen (["du", "-s", "--block-size=1", file_or_dir], stdout=subprocess.PIPE) result = p.communicate() m = re.match(r"^(\d+)\s.*", result[0]) sz = int(m.group(1)) if m is not None else 0 return sz def get_disk_utilization(self): return self.get_disk_usage(self.dir_path) def get_disk_utilization_private_img(self): return self.get_disk_usage(self.private_img) def get_private_img_sz(self): if not os.path.exists(self.private_img): return 0 return os.path.getsize(self.private_img) def create_xenstore_entries(self, xid): if dry_run: return # Set Xen Store entires with VM networking info: retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_vm_type".format(xid), self.type]) if self.is_netvm(): retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_netvm_gateway".format(xid), self.gateway]) retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_netvm_netmask".format(xid), self.netmask]) retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_netvm_network".format(xid), self.network]) elif self.netvm_vm is not None: retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_ip".format(xid), self.ip]) retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_netmask".format(xid), self.netmask]) retcode = subprocess.check_call ([ "/usr/bin/xenstore-write", "/local/domain/{0}/qubes_gateway".format(xid), self.gateway]) else: pass def get_free_xen_memory(self, session): hosts = session.xenapi.host.get_all() host_record = session.xenapi.host.get_record(hosts[0]) host_metrics_record = session.xenapi.host_metrics.get_record(host_record["metrics"]) ret = host_metrics_record["memory_free"] return long(ret) def start(self, debug_console = False, verbose = False): if dry_run: return if self.is_running(): raise QubesException ("VM is already running!") if verbose: print "--> Rereading the VM's conf file ({0})...".format(self.conf_file) self.update_xen_storage() session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] if verbose: print "--> Loading the VM (type = {0})...".format(self.type) mem_required = self.get_mem_static_max() dom0_mem = dom0_vm.get_mem() dom0_mem_new = dom0_mem - mem_required + self.get_free_xen_memory(session) if verbose: print "--> AppVM required mem : {0}".format(mem_required) print "--> Dom0 mem after launch : {0}".format(dom0_mem_new) if dom0_mem_new < dom0_min_memory: raise MemoryError ("ERROR: starting this VM would cause Dom0 memory to go below {0}B".format(dom0_min_memory)) session.xenapi.VM.start (uuid, True) # Starting a VM paused xid = int (session.xenapi.VM.get_domid (uuid)) if verbose: print "--> Setting Xen Store info for the VM..." self.create_xenstore_entries(xid) if not self.is_netvm() and self.netvm_vm is not None: assert self.netvm_vm is not None if verbose: print "--> Attaching to the network backend (netvm={0})...".format(self.netvm_vm.name) if self.netvm_vm.qid != 0: if not self.netvm_vm.is_running(): print "ERROR: NetVM not running, please start it first" self.force_shutdown() raise QubesException ("NetVM not running") retcode = subprocess.call (["/usr/sbin/xm", "network-attach", self.name, "backend={0}".format(self.netvm_vm.name)]) if retcode != 0: self.force_shutdown() raise OSError ("ERROR: Cannot attach to network backend!") else: retcode = subprocess.call (["/usr/sbin/xm", "network-attach", self.name, "backend=0"]) if retcode != 0: self.force_shutdown() raise OSError ("ERROR: Cannot attach to network backend!") if verbose: print "--> Starting the VM..." session.xenapi.VM.unpause (uuid) # perhaps we should move it before unpause and fork? if debug_console: from xen.xm import console if verbose: print "--> Starting debug console..." console.execConsole (xid) return xid def force_shutdown(self): if dry_run: return session = get_xend_session_new_api() uuids = session.xenapi.VM.get_by_name_label (self.name) uuid = uuids[0] session.xenapi.VM.hard_shutdown (uuid) def remove_from_disk(self): if dry_run: return shutil.rmtree (self.dir_path) class QubesTemplateVm(QubesVm): """ A class that represents an TemplateVM. A child of QubesVM. """ def __init__(self, **kwargs): if "dir_path" not in kwargs or kwargs["dir_path"] is None: kwargs["dir_path"] = qubes_templates_dir + "/" + kwargs["name"] if "updateable" not in kwargs or kwargs["updateable"] is None : kwargs["updateable"] = True root_img = kwargs.pop("root_img") if "root_img" in kwargs else None private_img = kwargs.pop("private_img") if "private_img" in kwargs else None appvms_conf_file = kwargs.pop("appvms_conf_file") if "appvms_conf_file" in kwargs else None super(QubesTemplateVm, self).__init__(type=VM_TEMPLATE, label = default_template_label, **kwargs) dir_path = kwargs["dir_path"] # TempleteVM doesn't use root-cow image if root_img is not None and os.path.isabs(root_img): self.root_img = root_img else: self.root_img = dir_path + "/" + ( root_img if root_img is not None else default_root_img) if private_img is not None and os.path.isabs(private_img): self.private_img = private_img else: self.private_img = dir_path + "/" + ( private_img if private_img is not None else default_private_img) if appvms_conf_file is not None and os.path.isabs(appvms_conf_file): self.appvms_conf_file = appvms_conf_file else: self.appvms_conf_file = dir_path + "/" + ( appvms_conf_file if appvms_conf_file is not None else default_appvms_conf_file) self.templatevm_conf_template = self.dir_path + "/" + default_templatevm_conf_template self.kernels_dir = self.dir_path + "/" + default_kernels_subdir self.appmenus_templates_dir = self.dir_path + "/" + default_appmenus_templates_subdir self.appvms = QubesVmCollection() def set_updateable(self): if self.is_updateable(): return assert not self.is_running() # Make sure that all the AppVMs are non-updateable... for appvm in self.appvms.values(): if appvm.is_updateable(): raise QubesException("One of the AppVMs ('{0}')is also 'updateable'\ -- cannot make the TempleteVM {'{1}'} 'nonupdatable'".\ format (appvm.name, self.name)) self.updateable = True def clone_disk_files(self, src_template_vm, verbose): if dry_run: return assert not src_template_vm.is_running(), "Attempt to clone a running Template VM!" if verbose: print "--> Creating directory: {0}".format(self.dir_path) os.mkdir (self.dir_path) if verbose: print "--> Copying the VM config file:\n{0} =*>\n{1}".\ format(src_template_vm.templatevm_conf_template, self.conf_file) conf_templatevm_template = open (src_template_vm.templatevm_conf_template, "r") conf_file = open(self.conf_file, "w") rx_templatename = re.compile (r"%TEMPLATENAME%") for line in conf_templatevm_template: line = rx_templatename.sub (self.name, line) conf_file.write(line) conf_templatevm_template.close() conf_file.close() if verbose: print "--> Copying the VM config template :\n{0} ==>\n{1}".\ format(src_template_vm.templatevm_conf_template, self.templatevm_conf_template) shutil.copy (src_template_vm.templatevm_conf_template, self.templatevm_conf_template) if verbose: print "--> Copying the VM config template :\n{0} ==>\n{1}".\ format(src_template_vm.appvms_conf_file, self.appvms_conf_file) shutil.copy (src_template_vm.appvms_conf_file, self.appvms_conf_file) if verbose: print "--> Copying the template's private image:\n{0} ==>\n{1}".\ format(src_template_vm.private_img, self.private_img) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", src_template_vm.private_img, self.private_img]) retcode = 0 if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_template_vm.private_img, self.private_img)) if verbose: print "--> Copying the template's root image:\n{0} ==>\n{1}".\ format(src_template_vm.root_img, self.root_img) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", src_template_vm.root_img, self.root_img]) retcode = 0 if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_template_vm.root_img, self.root_img)) if verbose: print "--> Copying the template's kernel dir:\n{0} ==>\n{1}".\ format(src_template_vm.kernels_dir, self.kernels_dir) shutil.copytree (src_template_vm.kernels_dir, self.kernels_dir) if verbose: print "--> Copying the template's appvm templates dir:\n{0} ==>\n{1}".\ format(src_template_vm.appmenus_templates_dir, self.appmenus_templates_dir) shutil.copytree (src_template_vm.appmenus_templates_dir, self.appmenus_templates_dir) def get_disk_utilization_root_img(self): return self.get_disk_usage(self.root_img) def get_root_img_sz(self): if not os.path.exists(self.root_img): return 0 return os.path.getsize(self.root_img) 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.conf_file): raise QubesException ( "VM config file doesn't exist: {0}".\ format(self.conf_file)) if not os.path.exists (self.appvms_conf_file): raise QubesException ( "Appvm template config file doesn't exist: {0}".\ format(self.appvms_conf_file)) 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.kernels_dir): raise QubesException ( "VM's kernels directory does not exist: {0}".\ format(self.kernels_dir)) return True def start(self, debug_console = False, verbose = False): if dry_run: return if not self.is_updateable(): raise QubesException ("Cannot start Template VM that is marked \"nonupdatable\"") # First ensure that none of our appvms is running: for appvm in self.appvms.values(): if appvm.is_running(): raise QubesException ("Cannot start TemplateVM when one of its AppVMs is running!") return super(QubesTemplateVm, self).start(debug_console=debug_console, verbose=verbose) def create_xml_element(self): element = xml.etree.ElementTree.Element( "QubesTemplateVm", qid=str(self.qid), name=self.name, dir_path=self.dir_path, conf_file=self.conf_file, appvms_conf_file=self.appvms_conf_file, root_img=self.root_img, private_img=self.private_img, uses_default_netvm=str(self.uses_default_netvm), netvm_qid=str(self.netvm_vm.qid) if self.netvm_vm is not None else "none", installed_by_rpm=str(self.installed_by_rpm), updateable=str(self.updateable), ) return element class QubesServiceVm(QubesVm): """ A class that represents a ServiceVM, e.g. NetVM. A child of QubesVM. """ def __init__(self, **kwargs): if "dir_path" not in kwargs or kwargs["dir_path"] is None: kwargs["dir_path"] = qubes_servicevms_dir + "/" + kwargs["name"] root_img = kwargs.pop("root_img") if "root_img" in kwargs else None private_img = kwargs.pop("private_img") if "private_img" in kwargs else None kwargs["updateable"] = True super(QubesServiceVm, self).__init__(**kwargs) dir_path = kwargs["dir_path"] assert dir_path is not None if root_img is not None and os.path.isabs(root_img): self.root_img = root_img else: self.root_img = dir_path + "/" + ( root_img if root_img is not None else default_root_img) if private_img is not None and os.path.isabs(private_img): self.private_img = private_img else: self.private_img = dir_path + "/" + ( private_img if private_img is not None else default_private_img) def set_updateable(self): if self.is_updateable(): return # ServiceVMs are standalone, we can always make it updateable # In fact there is no point in making it unpdatebale... # So, this is just for completncess assert not self.is_running() self.updateable = True def get_disk_utilization_root_img(self): return self.get_disk_usage(self.root_img) def get_root_img_sz(self): if not os.path.exists(self.root_img): return 0 return os.path.getsize(self.root_img) 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.conf_file): raise QubesException ( "VM config file doesn't exist: {0}".\ format(self.conf_file)) if not os.path.exists (self.root_img): raise QubesException ( "VM root image file doesn't exist: {0}".\ format(self.root_img)) return True def create_xml_element(self): raise NotImplementedError class QubesNetVm(QubesServiceVm): """ A class that represents a NetVM. A child of QubesServiceVM. """ def __init__(self, **kwargs): netid = kwargs.pop("netid") self.netid = netid self.__network = "10.{0}.0.0".format(netid) self.netprefix = "10.{0}.".format(netid) self.__netmask = vm_default_netmask self.__gateway = self.netprefix + "0.1" if "label" not in kwargs or kwargs["label"] is None: kwargs["label"] = default_servicevm_label super(QubesNetVm, self).__init__(type=VM_NETVM, installed_by_rpm=True, **kwargs) @property def gateway(self): return self.__gateway @property def netmask(self): return self.__netmask @property def network(self): return self.__network def get_ip_for_vm(self, qid): hi = qid / 253 lo = qid % 253 + 2 assert hi >= 0 and hi <= 254 and lo >= 2 and lo <= 254, "Wrong IP address for VM" return self.netprefix + "{0}.{1}".format(hi,lo) def create_xml_element(self): element = xml.etree.ElementTree.Element( "QubesNetVm", qid=str(self.qid), netid=str(self.netid), name=self.name, dir_path=self.dir_path, conf_file=self.conf_file, root_img=self.root_img, private_img=self.private_img, installed_by_rpm=str(self.installed_by_rpm), ) return element class QubesDom0NetVm(QubesNetVm): def __init__(self): super(QubesDom0NetVm, self).__init__(qid=0, name="dom0", netid=0, dir_path=None, root_img = None, private_img = None, label = default_template_label) def is_running(self): return True def get_cpu_total_load(self): if dry_run: import random return random.random() * 100 session = get_xend_session_new_api() hosts = session.xenapi.host.get_all() cpus = session.xenapi.host.get_host_CPUs(hosts[0]) cpu_total_load = 0.0 for cpu in cpus: cpu_total_load += session.xenapi.host_cpu.get_utilisation(cpu) cpu_total_load /= len(cpus) p = 100*cpu_total_load if p > 100: p = 100 return p def get_mem(self): # Unfortunately XenAPI provides only info about total memory, not the one actually usable by Dom0... #session = get_xend_session_new_api() #hosts = session.xenapi.host.get_all() #metrics = session.xenapi.host.get_metrics(hosts[0]) #memory_total = int(session.xenapi.metrics.get_memory_total(metrics)) # ... so we must read /proc/meminfo, just like free command does f = open ("/proc/meminfo") for line in f: match = re.match(r"^MemTotal\:\s*(\d+) kB", line) if match is not None: break f.close() assert match is not None return int(match.group(1))*1024 def get_xid(self): return 0 def get_power_state(self): return "Running" def get_disk_usage(self, file_or_dir): return 0 def get_disk_utilization(self): return 0 def get_disk_utilization_private_img(self): return 0 def get_private_img_sz(self): return 0 def start(self, debug_console = False, verbose = False): raise QubesException ("Cannot start Dom0 fake domain!") def create_xml_element(self): return None def verify_files(self): return True class QubesAppVm(QubesVm): """ A class that represents an AppVM. A child of QubesVM. """ def __init__(self, **kwargs): if "dir_path" not in kwargs or kwargs["dir_path"] is None: kwargs["dir_path"] = qubes_appvms_dir + "/" + kwargs["name"] if "updateable" not in kwargs or kwargs["updateable"] is None: kwargs["updateable"] = False private_img = kwargs.pop("private_img") template_vm = kwargs.pop("template_vm") super(QubesAppVm, self).__init__(type=VM_APPVM, **kwargs) qid = kwargs["qid"] dir_path = kwargs["dir_path"] assert template_vm is not None, "Missing template_vm for AppVM!" if not template_vm.is_templete(): print "ERROR: template_qid={0} doesn't point to a valid TempleteVM".\ format(new_vm.template_vm.qid) return False self.template_vm = template_vm template_vm.appvms[qid] = self # AppVM doesn't have its own root_img, it uses the one provided by the TemplateVM if private_img is not None and os.path.isabs(private_img): self.private_img = private_img else: self.private_img = dir_path + "/" + ( private_img if private_img is not None else default_private_img) self.rootcow_img = dir_path + "/" + default_rootcow_img self.swapcow_img = dir_path + "/" + default_swapcow_img def set_updateable(self): if self.is_updateable(): return assert not self.is_running() # Check if the TemaplteVM is *non* updatable... if not self.template_vm.is_updateable(): self.updateable = True self.reset_cow_storage() else: # Temaplate VM is Updatable itself --> can't make the AppVM updateable too # as this would cause COW-backed storage incoherency raise QubesException ("TemaplteVM is updateable: cannot make the AppVM '{0}' updateable".format(self.name)) def create_on_disk(self, verbose): if dry_run: return if verbose: print "--> Creating directory: {0}".format(self.dir_path) os.mkdir (self.dir_path) if verbose: print "--> Creating the VM config file: {0}".format(self.conf_file) conf_template = open (self.template_vm.appvms_conf_file, "r") conf_appvm = open(self.conf_file, "w") rx_vmname = re.compile (r"%VMNAME%") rx_vmdir = re.compile (r"%VMDIR%") rx_template = re.compile (r"%TEMPLATEDIR%") for line in conf_template: line = rx_vmname.sub (self.name, line) line = rx_vmdir.sub (self.dir_path, line) line = rx_template.sub (self.template_vm.dir_path, line) conf_appvm.write(line) conf_template.close() conf_appvm.close() template_priv = self.template_vm.private_img if verbose: print "--> Copying the template's private image: {0}".\ format(template_priv) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", template_priv, self.private_img]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(template_priv, self.private_img)) if verbose: print "--> Creating icon symlink: {0} -> {1}".format(self.icon_path, self.label.icon_path) os.symlink (self.label.icon_path, self.icon_path) subprocess.check_call ([qubes_appmenu_create_cmd, self.template_vm.appmenus_templates_dir, self.name]) def get_disk_utilization_root_img(self): return 0 def get_root_img_sz(self): return 0 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.conf_file): raise QubesException ( "VM config file doesn't exist: {0}".\ format(self.conf_file)) if not os.path.exists (self.private_img): raise QubesException ( "VM private image file doesn't exist: {0}".\ format(self.private_img)) return True def create_xml_element(self): element = xml.etree.ElementTree.Element( "QubesAppVm", qid=str(self.qid), name=self.name, dir_path=self.dir_path, conf_file=self.conf_file, template_qid=str(self.template_vm.qid), uses_default_netvm=str(self.uses_default_netvm), netvm_qid=str(self.netvm_vm.qid) if self.netvm_vm is not None else "none", private_img=self.private_img, installed_by_rpm=str(self.installed_by_rpm), updateable=str(self.updateable), label=self.label.name) return element def start(self, debug_console = False, verbose = False): if dry_run: return if self.is_running(): raise QubesException("VM is already running!") # First ensure that our template is *not* running: if self.template_vm.is_running(): raise QubesException ("Cannot start AppVM when its template is running!") if not self.is_updateable(): self.reset_cow_storage() return super(QubesAppVm, self).start(debug_console=debug_console, verbose=verbose) def reset_cow_storage (self): print "--> Resetting the COW storage: {0}...".format (self.rootcow_img) if dry_run: return # this is probbaly not needed, as open (..., "w") should remove the previous file if os.path.exists (self.rootcow_img): os.remove (self.rootcow_img) f_cow = open (self.rootcow_img, "w") f_root = open (self.template_vm.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() print "--> Resetting the COW storage: {0}...".format (self.swapcow_img) if os.path.exists (self.swapcow_img): os.remove (self.swapcow_img) f_swap_cow = open (self.swapcow_img, "w") f_swap_cow.truncate (swap_cow_sz) f_swap_cow.close() def remove_from_disk(self): if dry_run: return subprocess.check_call ([qubes_appmenu_remove_cmd, self.name]) shutil.rmtree (self.dir_path) class QubesVmCollection(dict): """ A collection of Qubes VMs indexed by Qubes id (qid) """ def __init__(self): super(QubesVmCollection, self).__init__() self.default_netvm_qid = None self.default_template_qid = None def values(self): for qid in self.keys(): yield self[qid] def items(self): for qid in self.keys(): yield (qid, self[qid]) def __iter__(self): for qid in sorted(super(QubesVmCollection, self).keys()): yield qid keys = __iter__ def __setitem__(self, key, value): if key not in self: return super(QubesVmCollection, self).__setitem__(key, value) else: assert False, "Attempt to add VM with qid that already exists in the collection!" def add_new_appvm(self, name, template_vm, dir_path = None, conf_file = None, private_img = None, label = None): qid = self.get_new_unused_qid() vm = QubesAppVm (qid=qid, name=name, template_vm=template_vm, dir_path=dir_path, conf_file=conf_file, private_img=private_img, netvm_vm = self.get_default_netvm_vm(), label=label) if not self.verify_new_vm (vm): assert False, "Wrong VM description!" self[vm.qid]=vm return vm def add_new_templatevm(self, name, dir_path = None, conf_file = None, root_img = None, private_img = None, installed_by_rpm = True): qid = self.get_new_unused_qid() vm = QubesTemplateVm (qid=qid, name=name, dir_path=dir_path, conf_file=conf_file, root_img=root_img, private_img=private_img, installed_by_rpm=installed_by_rpm, netvm_vm = self.get_default_netvm_vm()) if not self.verify_new_vm (vm): assert False, "Wrong VM description!" self[vm.qid]=vm if self.default_template_qid is None: self.set_default_template_vm(vm) return vm def clone_templatevm(self, src_template_vm, name, dir_path = None, verbose = False): assert not src_template_vm.is_running(), "Attempt to clone a running Template VM!" vm = self.add_new_templatevm (name=name, dir_path=dir_path, installed_by_rpm = False) return vm def add_new_netvm(self, name, dir_path = None, conf_file = None, root_img = None): qid = self.get_new_unused_qid() netid = self.get_new_unused_netid() vm = QubesNetVm (qid=qid, name=name, netid=netid, dir_path=dir_path, conf_file=conf_file, root_img=root_img) if not self.verify_new_vm (vm): assert False, "Wrong VM description!" self[vm.qid]=vm if self.default_netvm_qid is None: self.set_default_netvm_vm(vm) return vm def set_default_template_vm(self, vm): assert vm.is_templete(), "VM {0} is not a TempleteVM!".format(vm.name) self.default_template_qid = vm.qid def get_default_template_vm(self): if self.default_template_qid is None: return None else: return self[self.default_template_qid] def set_default_netvm_vm(self, vm): assert vm.is_netvm(), "VM {0} is not a NetVM!".format(vm.name) self.default_netvm_qid = vm.qid def get_default_netvm_vm(self): if self.default_netvm_qid is None: return None else: return self[self.default_netvm_qid] def get_vm_by_name(self, name): for vm in self.values(): if (vm.name == name): return vm return None def get_qid_by_name(self, name): vm = self.get_vm_by_name(name) return vm.qid if vm is not None else None def get_vms_based_on(self, template_qid): vms = set([vm for vm in self.values() if (vm.is_appvm() and vm.template_vm.qid == template_qid)]) return vms def verify_new_vm(self, new_vm): # Verify that qid is unique for vm in self.values(): if vm.qid == new_vm.qid: print "ERROR: The qid={0} is already used by VM '{1}'!".\ format(vm.qid, vm.name) return False # Verify that name is unique for vm in self.values(): if vm.name == new_vm.name: print "ERROR: The name={0} is already used by other VM with qid='{1}'!".\ format(vm.name, vm.qid) return False return True def get_new_unused_qid(self): used_ids = set([vm.qid for vm in self.values()]) for id in range (1, qubes_max_qid): if id not in used_ids: return id raise LookupError ("Cannot find unused qid!") def get_new_unused_netid(self): used_ids = set([vm.netid for vm in self.values() if vm.is_netvm()]) for id in range (1, qubes_max_netid): if id not in used_ids: return id raise LookupError ("Cannot find unused netid!") def check_if_storage_exists(self): try: f = open (qubes_store_filename, 'r') except IOError: return False f.close() return True def create_empty_storage(self): self.qubes_store_file = open (qubes_store_filename, 'w') self.clear() self.save() def lock_db_for_reading(self): self.qubes_store_file = open (qubes_store_filename, 'r') fcntl.lockf (self.qubes_store_file, fcntl.LOCK_SH) def lock_db_for_writing(self): self.qubes_store_file = open (qubes_store_filename, 'r+') fcntl.lockf (self.qubes_store_file, fcntl.LOCK_EX) def unlock_db(self): fcntl.lockf (self.qubes_store_file, fcntl.LOCK_UN) self.qubes_store_file.close() def save(self): root = xml.etree.ElementTree.Element( "QubesVmCollection", default_template=str(self.default_template_qid) \ if self.default_template_qid is not None else "None", default_netvm=str(self.default_netvm_qid) \ if self.default_netvm_qid is not None else "None" ) for vm in self.values(): element = vm.create_xml_element() if element is not None: root.append(element) tree = xml.etree.ElementTree.ElementTree(root) try: # We need to manually truncate the file, as we open the # file as "r+" in the lock_db_for_writing() function self.qubes_store_file.seek (0, os.SEEK_SET) self.qubes_store_file.truncate() tree.write(self.qubes_store_file, "UTF-8") except EnvironmentError as err: print("{0}: import error: {1}".format( os.path.basename(sys.argv[0]), err)) return False return True def load(self): self.clear() dom0vm = QubesDom0NetVm () self[dom0vm.qid] = dom0vm self.default_netvm_qid = 0 global dom0_vm dom0_vm = dom0vm try: tree = xml.etree.ElementTree.parse(self.qubes_store_file) except (EnvironmentError, xml.parsers.expat.ExpatError) as err: print("{0}: import error: {1}".format( os.path.basename(sys.argv[0]), err)) return False element = tree.getroot() default_template = element.get("default_template") self.default_template_qid = int(default_template) \ if default_template != "None" else None default_netvm = element.get("default_netvm") if default_netvm is not None: self.default_netvm_qid = int(default_netvm) \ if default_netvm != "None" else None #assert self.default_netvm_qid is not None # Read in the NetVMs first, because a reference to NetVM # is needed to create all other VMs for element in tree.findall("QubesNetVm"): try: kwargs = {} attr_list = ("qid", "netid", "name", "dir_path", "conf_file", "private_img", "root_img", ) for attribute in attr_list: kwargs[attribute] = element.get(attribute) kwargs["qid"] = int(kwargs["qid"]) kwargs["netid"] = int(kwargs["netid"]) vm = QubesNetVm(**kwargs) self[vm.qid] = vm except (ValueError, LookupError) as err: print("{0}: import error (QubesNetVM) {1}".format( os.path.basename(sys.argv[0]), err)) return False self.default_template_qid # Then, read in the TemplateVMs, because a reference to templete VM # is needed to create each AppVM for element in tree.findall("QubesTemplateVm"): try: kwargs = {} attr_list = ("qid", "name", "dir_path", "conf_file", "appvms_conf_file", "private_img", "root_img", "installed_by_rpm", "updateable", "uses_default_netvm", "netvm_qid") for attribute in attr_list: kwargs[attribute] = element.get(attribute) kwargs["qid"] = int(kwargs["qid"]) kwargs["installed_by_rpm"] = True if kwargs["installed_by_rpm"] == "True" else False if kwargs["updateable"] is not None: kwargs["updateable"] = True if kwargs["updateable"] == "True" else False if "uses_default_netvm" not in kwargs: kwargs["uses_default_netvm"] = True else: kwargs["uses_default_netvm"] = True if kwargs["uses_default_netvm"] == "True" else False if kwargs["uses_default_netvm"] is True: netvm_vm = self.get_default_netvm_vm() kwargs.pop("netvm_qid") else: if kwargs["netvm_qid"] == "none" or kwargs["netvm_qid"] is None: netvm_vm = None kwargs.pop("netvm_qid") else: netvm_qid = int(kwargs.pop("netvm_qid")) if netvm_qid not in self: netvm_vm = None else: netvm_vm = self[netvm_qid] kwargs["netvm_vm"] = netvm_vm vm = QubesTemplateVm(**kwargs) self[vm.qid] = vm except (ValueError, LookupError) as err: print("{0}: import error (QubesTemplateVm): {1}".format( os.path.basename(sys.argv[0]), err)) return False # Finally, read in the AppVMs for element in tree.findall("QubesAppVm"): try: kwargs = {} attr_list = ("qid", "name", "dir_path", "conf_file", "private_img", "template_qid", "updateable", "label", "netvm_qid", "uses_default_netvm") for attribute in attr_list: kwargs[attribute] = element.get(attribute) kwargs["qid"] = int(kwargs["qid"]) kwargs["template_qid"] = int(kwargs["template_qid"]) if kwargs["updateable"] is not None: kwargs["updateable"] = True if kwargs["updateable"] == "True" else False template_vm = self[kwargs.pop("template_qid")] if template_vm is None: print "ERROR: AppVM '{0}' uses unkown template qid='{1}'!".\ format(kwargs["name"], kwargs["template_qid"]) kwargs["template_vm"] = template_vm if "uses_default_netvm" not in kwargs: kwargs["uses_default_netvm"] = True else: kwargs["uses_default_netvm"] = True if kwargs["uses_default_netvm"] == "True" else False if kwargs["uses_default_netvm"] is True: netvm_vm = self.get_default_netvm_vm() kwargs.pop("netvm_qid") else: if kwargs["netvm_qid"] == "none" or kwargs["netvm_qid"] is None: netvm_vm = None kwargs.pop("netvm_qid") else: netvm_qid = int(kwargs.pop("netvm_qid")) if netvm_qid not in self: netvm_vm = None else: netvm_vm = self[netvm_qid] kwargs["netvm_vm"] = netvm_vm if kwargs["label"] is not None: if kwargs["label"] not in QubesVmLabels: print "ERROR: incorrect label for VM '{0}'".format(kwargs["name"]) kwargs.pop ("label") else: kwargs["label"] = QubesVmLabels[kwargs["label"]] vm = QubesAppVm(**kwargs) self[vm.qid] = vm except (ValueError, LookupError) as err: print("{0}: import error (QubesAppVm): {1}".format( os.path.basename(sys.argv[0]), err)) return False return True class QubesDaemonPidfile(object): def __init__(self, name): self.name = name self.path = "/var/run/qubes/" + name + ".pid" def create_pidfile(self): f = open (self.path, 'w') f.write(str(os.getpid())) f.close() def pidfile_exists(self): return os.path.exists(self.path) def read_pid(self): f = open (self.path) pid = f.read ().strip() f.close() return int(pid) def pidfile_is_stale(self): if not self.pidfile_exists(): return False # check if the pid file is valid... proc_path = "/proc/" + str(self.read_pid()) + "/cmdline" if not os.path.exists (proc_path): print "Path {0} doesn't exist, assuming stale pidfile.".format(proc_path) return True f = open (proc_path) cmdline = f.read () f.close() # The following doesn't work with python -- one would have to get argv[1] and compare it with self.name... # if not cmdline.strip().endswith(self.name): # print "{0} = {1} doesn't seem to point to our process ({2}), assuming stale pidile.".format(proc_path, cmdline, self.name) # return True return False # It's a good pidfile def remove_pidfile(self): os.remove (self.path) def __enter__ (self): # assumes the pidfile doesn't exist -- you should ensure it before opening the context self.create_pidfile() def __exit__ (self): self.remove_pidfile()