#!/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 import uuid import time from datetime import datetime from qmemman_client import QMemmanClient # 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: import xen.lowlevel.xc import xen.lowlevel.xl import xen.lowlevel.xs qubes_guid_path = "/usr/bin/qubes_guid" qrexec_daemon_path = "/usr/lib/qubes/qrexec_daemon" qrexec_client_path = "/usr/lib/qubes/qrexec_client" qubes_clipd_path = "/usr/bin/qclipd" 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_kernels_base_dir = qubes_base_dir + "/vm-kernels" qubes_max_xid = 1024 qubes_max_qid = 254 qubes_max_netid = 254 vm_default_netmask = "255.255.255.0" default_root_img = "root.img" default_rootcow_img = "root-cow.img" default_volatile_img = "volatile.img" default_clean_volatile_img = "clean-volatile.img.tar" default_private_img = "private.img" default_appmenus_templates_subdir = "apps.templates" default_appmenus_template_templates_subdir = "apps-template.templates" default_kernels_subdir = "kernels" default_firewall_conf_file = "firewall.xml" default_memory = 400 default_servicevm_vcpus = 1 default_kernelopts = "" default_kernelopts_pcidevs = "iommu=soft swiotlb=2048" qubes_whitelisted_appmenus = 'whitelisted-appmenus.list' dom0_update_check_interval = 6*3600 # how long (in sec) to wait for VMs to shutdown # before killing them (when used qvm-run with --wait option) shutdown_counter_max = 60 # 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" qubes_pciback_cmd = '/usr/lib/qubes/unbind_pci_device.sh' class QubesException (Exception) : pass if not dry_run: xc = xen.lowlevel.xc.xc() xs = xen.lowlevel.xs.xs() xl_ctx = xen.lowlevel.xl.ctx() class QubesHost(object): def __init__(self): self.physinfo = xc.physinfo() self.xen_total_mem = long(self.physinfo['total_memory']) self.xen_no_cpus = self.physinfo['nr_cpus'] # print "QubesHost: total_mem = {0}B".format (self.xen_total_mem) # print "QubesHost: free_mem = {0}".format (self.get_free_xen_memory()) # print "QubesHost: total_cpus = {0}".format (self.xen_no_cpus) @property def memory_total(self): return self.xen_total_mem @property def no_cpus(self): return self.xen_no_cpus def get_free_xen_memory(self): ret = self.physinfo['free_memory'] return long(ret) # measure cpu usage for all domains at once def measure_cpu_usage(self, previous=None, previous_time = None, wait_time=1): if previous is None: previous_time = time.time() previous = {} info = xc.domain_getinfo(0, qubes_max_xid) for vm in info: previous[vm['domid']] = {} previous[vm['domid']]['cpu_time'] = vm['cpu_time']/vm['online_vcpus'] previous[vm['domid']]['cpu_usage'] = 0 time.sleep(wait_time) current_time = time.time() current = {} info = xc.domain_getinfo(0, qubes_max_xid) for vm in info: current[vm['domid']] = {} current[vm['domid']]['cpu_time'] = vm['cpu_time']/max(vm['online_vcpus'],1) if vm['domid'] in previous.keys(): current[vm['domid']]['cpu_usage'] = \ float(current[vm['domid']]['cpu_time'] - previous[vm['domid']]['cpu_time']) \ / long(1000**3) / (current_time-previous_time) * 100 if current[vm['domid']]['cpu_usage'] < 0: # VM has been rebooted current[vm['domid']]['cpu_usage'] = 0 else: current[vm['domid']]['cpu_usage'] = 0 return (current_time, current) class QubesVmLabel(object): def __init__(self, name, index, color = None, icon = None): self.name = name self.index = index 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 = { "red" : QubesVmLabel ("red", 1), "orange" : QubesVmLabel ("orange", 2), "yellow" : QubesVmLabel ("yellow", 3), "green" : QubesVmLabel ("green", 4, color="0x5fa05e"), "gray" : QubesVmLabel ("gray", 5), "blue" : QubesVmLabel ("blue", 6), "purple" : QubesVmLabel ("purple", 7, color="0xb83374"), "black" : QubesVmLabel ("black", 8), } 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, dir_path, conf_file = None, uses_default_netvm = True, netvm_vm = None, installed_by_rpm = False, updateable = False, label = None, root_img = None, private_img = None, memory = default_memory, maxmem = None, template_vm = None, firewall_conf = None, volatile_img = None, pcidevs = None, internal = False, vcpus = None, kernel = None, uses_default_kernel = True, kernelopts = "", uses_default_kernelopts = True, services = None): assert qid < qubes_max_qid, "VM id out of bounds!" self.__qid = qid self.name = name self.dir_path = dir_path self.conf_file = self.absolute_path(conf_file, name + ".conf") self.uses_default_netvm = uses_default_netvm self.netvm_vm = netvm_vm if netvm_vm is not None: netvm_vm.connected_vms[qid] = self # We use it in remove from disk to avoid removing rpm files (for templates) self.installed_by_rpm = installed_by_rpm # Setup standard VM storage; some VM types may not use them all self.root_img = self.absolute_path(root_img, default_root_img) self.volatile_img = self.absolute_path(volatile_img, default_volatile_img) self.private_img = self.absolute_path(private_img, default_private_img) self.firewall_conf = self.absolute_path(firewall_conf, default_firewall_conf_file) self.updateable = updateable self.label = label if label is not None else QubesVmLabels["red"] if self.dir_path is not None: self.icon_path = self.dir_path + "/icon.png" else: self.icon_path = None # PCI devices - used only by NetVM if pcidevs is None or pcidevs == "none": self.pcidevs = [] elif pcidevs.find('[') < 0: # Backward compatibility self.pcidevs = eval('[' + pcidevs + ']') else: self.pcidevs = eval(pcidevs) self.memory = memory if maxmem is None: host = QubesHost() total_mem_mb = host.memory_total/1024 self.maxmem = total_mem_mb/2 else: self.maxmem = maxmem self.template_vm = template_vm if template_vm is not None: if updateable: print >> sys.stderr, "ERROR: Template based VM cannot be updateable!" return False if not template_vm.is_template(): print >> sys.stderr, "ERROR: template_qid={0} doesn't point to a valid TemplateVM".\ format(template_vm.qid) return False template_vm.appvms[qid] = self else: assert self.root_img is not None, "Missing root_img for standalone VM!" self.kernel = kernel if template_vm is not None: self.kernels_dir = template_vm.kernels_dir self.kernel = template_vm.kernel elif self.kernel is not None: self.kernels_dir = qubes_kernels_base_dir + "/" + self.kernel else: # for backward compatibility (or another rare case): kernel=None -> kernel in VM dir self.kernels_dir = self.dir_path + "/" + default_kernels_subdir self.uses_default_kernel = uses_default_kernel self.appmenus_templates_dir = None if updateable: self.appmenus_templates_dir = self.dir_path + "/" + default_appmenus_templates_subdir elif template_vm is not None: self.appmenus_templates_dir = template_vm.appmenus_templates_dir # By default allow use all VCPUs if vcpus is None: qubes_host = QubesHost() self.vcpus = qubes_host.no_cpus else: self.vcpus = vcpus self.uses_default_kernelopts = uses_default_kernelopts if self.uses_default_kernelopts: if len(self.pcidevs) > 0: self.kernelopts = default_kernelopts_pcidevs else: self.kernelopts = default_kernelopts else: self.kernelopts = kernelopts self.services = {} if services is not None: self.services = eval(str(services)) # Internal VM (not shown in qubes-manager, doesn't create appmenus entries self.internal = internal self.xid = -1 self.xid = self.get_xid() def absolute_path(self, arg, default): if arg is not None and os.path.isabs(arg): return arg else: return self.dir_path + "/" + (arg if arg is not None else default) def relative_path(self, arg): return arg.replace(self.dir_path + '/', '') @property def qid(self): return self.__qid @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 @property def secondary_dns(self): if self.netvm_vm is not None: return self.netvm_vm.secondary_dns 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_updateable(self): if self.is_updateable(): return raise QubesException ("Change 'updateable' flag is not supported. Please use qvm-create.") def set_nonupdateable(self): if not self.is_updateable(): return raise QubesException ("Change 'updateable' flag is not supported. Please use qvm-create.") def set_netvm_vm(self, netvm_vm): if self.netvm_vm is not None: self.netvm_vm.connected_vms.pop(self.qid) if netvm_vm is None: # Set also firewall to block all traffic as discussed in #370 if os.path.exists(self.firewall_conf): shutil.copy(self.firewall_conf, "%s/backup/%s-firewall-%s.xml" % (qubes_base_dir, self.name, time.strftime('%Y-%m-%d-%H:%M:%S'))) self.write_firewall_conf({'allow': False, 'allowDns': False, 'allowIcmp': False, 'rules': []}) else: netvm_vm.connected_vms[self.qid]=self self.netvm_vm = netvm_vm def pre_rename(self, new_name): pass def set_name(self, name): if self.is_running(): raise QubesException("Cannot change name of running VM!") self.pre_rename(name) new_conf = "%s/%s.conf" % (self.dir_path, name) if os.path.exists(self.conf_file): os.rename(self.conf_file, "%s/%s.conf" % (self.dir_path, name)) old_dirpath = self.dir_path new_dirpath = os.path.dirname(self.dir_path) + '/' + name os.rename(old_dirpath, new_dirpath) self.dir_path = new_dirpath old_name = self.name self.name = name if self.private_img is not None: self.private_img = self.private_img.replace(old_dirpath, new_dirpath) if self.root_img is not None: self.root_img = self.root_img.replace(old_dirpath, new_dirpath) if self.volatile_img is not None: self.volatile_img = self.volatile_img.replace(old_dirpath, new_dirpath) if self.conf_file is not None: self.conf_file = new_conf.replace(old_dirpath, new_dirpath) if self.appmenus_templates_dir is not None: self.appmenus_templates_dir = self.appmenus_templates_dir.replace(old_dirpath, new_dirpath) if self.icon_path is not None: self.icon_path = self.icon_path.replace(old_dirpath, new_dirpath) if self.kernels_dir is not None: self.kernels_dir = self.kernels_dir.replace(old_dirpath, new_dirpath) self.post_rename(old_name) def post_rename(self, old_name): pass def is_template(self): return isinstance(self, QubesTemplateVm) def is_appvm(self): return isinstance(self, QubesAppVm) def is_netvm(self): return isinstance(self, QubesNetVm) def is_proxyvm(self): return isinstance(self, QubesProxyVm) def is_disposablevm(self): return isinstance(self, QubesDisposableVm) def get_xl_dominfo(self): if dry_run: return domains = xl_ctx.list_domains() for dominfo in domains: domname = xl_ctx.domid_to_name(dominfo.domid) if domname == self.name: return dominfo return None def get_xc_dominfo(self): if dry_run: return start_xid = self.xid if start_xid < 0: start_xid = 0 try: domains = xc.domain_getinfo(start_xid, qubes_max_xid-start_xid) except xen.lowlevel.xc.Error: return None for dominfo in domains: domname = xl_ctx.domid_to_name(dominfo['domid']) if domname == self.name: return dominfo return None def get_xid(self): if dry_run: return 666 dominfo = self.get_xc_dominfo() if dominfo: self.xid = dominfo['domid'] return self.xid else: return -1 def get_uuid(self): dominfo = self.get_xl_dominfo() if dominfo: vmuuid = uuid.UUID(''.join('%02x' % b for b in dominfo.uuid)) return vmuuid else: return None def get_mem(self): if dry_run: return 666 dominfo = self.get_xc_dominfo() if dominfo: return dominfo['mem_kb'] else: return 0 def get_mem_static_max(self): if dry_run: return 666 dominfo = self.get_xc_dominfo() if dominfo: return dominfo['maxmem_kb'] else: return 0 def get_per_cpu_time(self): if dry_run: import random return random.random() * 100 dominfo = self.get_xc_dominfo() if dominfo: return dominfo['cpu_time']/dominfo['online_vcpus'] else: return 0 def get_disk_utilization_root_img(self): if not os.path.exists(self.root_img): return 0 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 get_power_state(self): if dry_run: return "NA" dominfo = self.get_xc_dominfo() if dominfo: if dominfo['paused']: return "Paused" elif dominfo['crashed']: return "Crashed" elif dominfo['shutdown']: return "Halting" elif dominfo['dying']: return "Dying" else: return "Running" else: return 'Halted' return "NA" def is_running(self): if self.get_power_state() == "Running": return True else: return False def is_paused(self): if self.get_power_state() == "Paused": return True else: return False def get_start_time(self): if not self.is_running(): return None dominfo = self.get_xl_dominfo() uuid = self.get_uuid() start_time = xs.read('', "/vm/%s/start_time" % str(uuid)) if start_time != '': return datetime.datetime.fromtimestamp(float(start_time)) else: return None def is_outdated(self): # Makes sense only on VM based on template if self.template_vm is None: return False if not self.is_running(): return False rootimg_inode = os.stat(self.template_vm.root_img) rootcow_inode = os.stat(self.template_vm.rootcow_img) current_dmdev = "/dev/mapper/snapshot-{0:x}:{1}-{2:x}:{3}".format( rootimg_inode[2], rootimg_inode[1], rootcow_inode[2], rootcow_inode[1]) # Don't know why, but 51712 is xvda # backend node name not available through xenapi :( used_dmdev = xs.read('', "/local/domain/0/backend/vbd/{0}/51712/node".format(self.get_xid())) return used_dmdev != current_dmdev 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 resize_private_img(self, size): f_private = open (self.private_img, "a+b") f_private.truncate (size) f_private.close () def cleanup_vifs(self): """ Xend does not remove vif when backend domain is down, so we must do it manually """ if not self.is_running(): return dev_basepath = '/local/domain/%d/device/vif' % self.xid for dev in xs.ls('', dev_basepath): # check if backend domain is alive backend_xid = int(xs.read('', '%s/%s/backend-id' % (dev_basepath, dev))) if xl_ctx.domid_to_name(backend_xid) is not None: # check if device is still active if xs.read('', '%s/%s/state' % (dev_basepath, dev)) == '4': continue # remove dead device xs.rm('', '%s/%s' % (dev_basepath, dev)) def create_xenstore_entries(self, xid = None): if dry_run: return if xid is None: xid = self.xid domain_path = xs.get_domain_path(xid) # Set Xen Store entires with VM networking info: xs.write('', "{0}/qubes_vm_type".format(domain_path), self.type) xs.write('', "{0}/qubes_vm_updateable".format(domain_path), str(self.updateable)) if self.is_netvm(): xs.write('', "{0}/qubes_netvm_gateway".format(domain_path), self.gateway) xs.write('', "{0}/qubes_netvm_secondary_dns".format(domain_path), self.secondary_dns) xs.write('', "{0}/qubes_netvm_netmask".format(domain_path), self.netmask) xs.write('', "{0}/qubes_netvm_network".format(domain_path), self.network) if self.netvm_vm is not None: xs.write('', "{0}/qubes_ip".format(domain_path), self.ip) xs.write('', "{0}/qubes_netmask".format(domain_path), self.netvm_vm.netmask) xs.write('', "{0}/qubes_gateway".format(domain_path), self.netvm_vm.gateway) xs.write('', "{0}/qubes_secondary_dns".format(domain_path), self.netvm_vm.secondary_dns) for srv in self.services.keys(): # convert True/False to "1"/"0" xs.write('', "{0}/qubes-service/{1}".format(domain_path, srv), str(int(self.services[srv]))) xs.write('', "{0}/qubes-block-devices".format(domain_path), '') # Fix permissions xs.set_permissions('', '{0}/device'.format(domain_path), [{ 'dom': xid }]) xs.set_permissions('', '{0}/memory'.format(domain_path), [{ 'dom': xid }]) xs.set_permissions('', '{0}/qubes-block-devices'.format(domain_path), [{ 'dom': xid }]) def get_rootdev(self, source_template=None): if self.template_vm: return "'script:snapshot:{dir}/root.img:{dir}/root-cow.img,xvda,r',".format(dir=self.template_vm.dir_path) else: return "'script:file:{dir}/root.img,xvda,w',".format(dir=self.dir_path) def get_config_params(self, source_template=None): args = {} args['name'] = self.name args['kerneldir'] = self.kernels_dir args['vmdir'] = self.dir_path args['pcidev'] = str(self.pcidevs).strip('[]') args['mem'] = str(self.memory) args['maxmem'] = str(self.maxmem) args['vcpus'] = str(self.vcpus) if self.netvm_vm is not None: args['netdev'] = "'script=/etc/xen/scripts/vif-route-qubes,ip={ip}".format(ip=self.ip) if self.netvm_vm.qid != 0: args['netdev'] += ",backend={0}".format(self.netvm_vm.name) args['netdev'] += "'" else: args['netdev'] = '' args['rootdev'] = self.get_rootdev(source_template=source_template) args['privatedev'] = "'script:file:{dir}/private.img,xvdb,w',".format(dir=self.dir_path) args['volatiledev'] = "'script:file:{dir}/volatile.img,xvdc,w',".format(dir=self.dir_path) modulesmode='r' if self.is_updateable() and self.kernel is None: modulesmode='w' args['otherdevs'] = "'script:file:{dir}/modules.img,xvdd,{mode}',".format(dir=self.kernels_dir, mode=modulesmode) args['kernelopts'] = self.kernelopts return args def create_config_file(self, file_path = None, source_template = None, prepare_dvm = False): if file_path is None: file_path = self.conf_file if source_template is None: source_template = self.template_vm f_conf_template = open('/usr/share/qubes/vm-template.conf', 'r') conf_template = f_conf_template.read() f_conf_template.close() template_params = self.get_config_params(source_template) if prepare_dvm: template_params['name'] = '%NAME%' template_params['privatedev'] = '' template_params['netdev'] = re.sub(r"ip=[0-9.]*", "ip=%IP%", template_params['netdev']) conf_appvm = open(file_path, "w") conf_appvm.write(conf_template.format(**template_params)) conf_appvm.close() def create_on_disk(self, verbose, source_template = None): if source_template is None: source_template = self.template_vm assert source_template is not None if dry_run: return if verbose: print >> sys.stderr, "--> Creating directory: {0}".format(self.dir_path) os.mkdir (self.dir_path) if verbose: print >> sys.stderr, "--> Creating the VM config file: {0}".format(self.conf_file) self.create_config_file(source_template = source_template) template_priv = source_template.private_img if verbose: print >> sys.stderr, "--> 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 os.path.exists(source_template.dir_path + '/vm-' + qubes_whitelisted_appmenus): if verbose: print >> sys.stderr, "--> Creating default whitelisted apps list: {0}".\ format(self.dir_path + '/' + qubes_whitelisted_appmenus) shutil.copy(source_template.dir_path + '/vm-' + qubes_whitelisted_appmenus, self.dir_path + '/' + qubes_whitelisted_appmenus) if self.is_updateable(): template_root = source_template.root_img if verbose: print >> sys.stderr, "--> Copying the template's root image: {0}".\ format(template_root) # We prefer to use Linux's cp, because it nicely handles sparse files retcode = subprocess.call (["cp", template_root, self.root_img]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(template_root, self.root_img)) kernels_dir = source_template.kernels_dir if verbose: print >> sys.stderr, "--> Copying the kernel (set kernel \"none\" to use it): {0}".\ format(kernels_dir) os.mkdir (self.dir_path + '/kernels') for f in ("vmlinuz", "initramfs", "modules.img"): shutil.copy(kernels_dir + '/' + f, self.dir_path + '/kernels/' + f) # Create volatile.img self.reset_volatile_storage(source_template = source_template, verbose=verbose) def create_appmenus(self, verbose, source_template = None): if source_template is None: source_template = self.template_vm vmtype = None if self.is_netvm(): vmtype = 'servicevms' else: vmtype = 'appvms' try: if source_template is not None: subprocess.check_call ([qubes_appmenu_create_cmd, source_template.appmenus_templates_dir, self.name]) elif self.appmenus_templates_dir is not None: subprocess.check_call ([qubes_appmenu_create_cmd, self.appmenus_templates_dir, self.name]) else: # Only add apps to menu subprocess.check_call ([qubes_appmenu_create_cmd, "none", self.name, vmtype]) except subprocess.CalledProcessError: print >> sys.stderr, "Ooops, there was a problem creating appmenus for {0} VM!".format (self.name) def remove_appmenus(self): vmtype = None if self.is_netvm(): vmtype = 'servicevms' else: vmtype = 'appvms' subprocess.check_call ([qubes_appmenu_remove_cmd, self.name, vmtype]) 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 self.is_updateable() and 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 + '/vmlinuz'): raise QubesException ( "VM kernel does not exists: {0}".\ format(self.kernels_dir + '/vmlinuz')) if not os.path.exists (self.kernels_dir + '/initramfs'): raise QubesException ( "VM initramfs does not exists: {0}".\ format(self.kernels_dir + '/initramfs')) if not os.path.exists (self.kernels_dir + '/modules.img'): raise QubesException ( "VM kernel modules image does not exists: {0}".\ format(self.kernels_dir + '/modules.img')) return True def reset_volatile_storage(self, source_template = None, verbose = False): assert not self.is_running(), "Attempt to clean volatile image of running VM!" if source_template is None: source_template = self.template_vm # Only makes sense on template based VM if source_template is None: return 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", source_template.clean_volatile_img, "-C", self.dir_path]) if retcode != 0: raise IOError ("Error while unpacking {0} to {1}".\ format(source_template.clean_volatile_img, self.volatile_img)) def remove_from_disk(self): if dry_run: return shutil.rmtree (self.dir_path) def write_firewall_conf(self, conf): root = xml.etree.ElementTree.Element( "QubesFirwallRules", policy = "allow" if conf["allow"] else "deny", dns = "allow" if conf["allowDns"] else "deny", icmp = "allow" if conf["allowIcmp"] else "deny" ) for rule in conf["rules"]: element = xml.etree.ElementTree.Element( "rule", address=rule["address"], port=str(rule["portBegin"]), ) if rule["netmask"] is not None and rule["netmask"] != 32: element.set("netmask", str(rule["netmask"])) if rule["portEnd"] is not None: element.set("toport", str(rule["portEnd"])) root.append(element) tree = xml.etree.ElementTree.ElementTree(root) try: f = open(self.firewall_conf, 'a') # create the file if not exist f.close() with open(self.firewall_conf, 'w') as f: fcntl.lockf(f, fcntl.LOCK_EX) tree.write(f, "UTF-8") fcntl.lockf(f, fcntl.LOCK_UN) f.close() except EnvironmentError as err: print >> sys.stderr, "{0}: save error: {1}".format( os.path.basename(sys.argv[0]), err) return False return True def has_firewall(self): return os.path.exists (self.firewall_conf) def get_firewall_conf(self): conf = { "rules": list(), "allow": True, "allowDns": True, "allowIcmp": True } try: tree = xml.etree.ElementTree.parse(self.firewall_conf) root = tree.getroot() conf["allow"] = (root.get("policy") == "allow") conf["allowDns"] = (root.get("dns") == "allow") conf["allowIcmp"] = (root.get("icmp") == "allow") for element in root: rule = {} attr_list = ("address", "netmask", "port", "toport") for attribute in attr_list: rule[attribute] = element.get(attribute) if rule["netmask"] is not None: rule["netmask"] = int(rule["netmask"]) else: rule["netmask"] = 32 rule["portBegin"] = int(rule["port"]) if rule["toport"] is not None: rule["portEnd"] = int(rule["toport"]) else: rule["portEnd"] = None del(rule["port"]) del(rule["toport"]) conf["rules"].append(rule) except EnvironmentError as err: return conf except (xml.parsers.expat.ExpatError, ValueError, LookupError) as err: print("{0}: load error: {1}".format( os.path.basename(sys.argv[0]), err)) return None return conf def attach_network(self, verbose = False, wait = True, netvm = None): if dry_run: return if not self.is_running(): raise QubesException ("VM not running!") if netvm is None: netvm = self.netvm_vm if netvm is None: raise QubesException ("NetVM not set!") if netvm.qid != 0: if not netvm.is_running(): if verbose: print >> sys.stderr, "--> Starting NetVM {0}...".format(netvm.name) netvm.start() xs_path = '/local/domain/%d/device/vif/0/state' % (self.xid) if xs.read('', xs_path) is not None: # TODO: check its state and backend state (this can be stale vif after NetVM restart) if verbose: print >> sys.stderr, "NOTICE: Network already attached" return xm_cmdline = ["/usr/sbin/xl", "network-attach", str(self.xid), "script=/etc/xen/scripts/vif-route-qubes", "ip="+self.ip, "backend="+netvm.name ] retcode = subprocess.call (xm_cmdline) if retcode != 0: print >> sys.stderr, ("WARNING: Cannot attach to network to '{0}'!".format(self.name)) if wait: tries = 0 while xs.read('', xs_path) != '4': tries += 1 if tries > 50: raise QubesException ("Network attach timed out!") time.sleep(0.2) def start_guid(self, verbose = True, notify_function = None): if verbose: print >> sys.stderr, "--> Starting Qubes GUId..." xid = self.get_xid() retcode = subprocess.call ([qubes_guid_path, "-d", str(xid), "-c", self.label.color, "-i", self.label.icon, "-l", str(self.label.index)]) if (retcode != 0) : raise QubesException("Cannot start qubes_guid!") if verbose: print >> sys.stderr, "--> Waiting for qubes-session..." subprocess.call([qrexec_client_path, "-d", str(xid), "user:echo $$ >> /tmp/qubes-session-waiter; [ ! -f /tmp/qubes-session-env ] && exec sleep 365d"]) retcode = subprocess.call([qubes_clipd_path]) if retcode != 0: print >> sys.stderr, "ERROR: Cannot start qclipd!" if notify_function is not None: notify_function("error", "ERROR: Cannot start the Qubes Clipboard Notifier!") def start(self, debug_console = False, verbose = False, preparing_dvm = False): if dry_run: return # Intentionally not used is_running(): eliminate also "Paused", "Crashed", "Halting" if self.get_power_state() != "Halted": raise QubesException ("VM is already running!") if self.netvm_vm is not None: if self.netvm_vm.qid != 0: if not self.netvm_vm.is_running(): if verbose: print >> sys.stderr, "--> Starting NetVM {0}...".format(self.netvm_vm.name) self.netvm_vm.start() self.reset_volatile_storage(verbose=verbose) if verbose: print >> sys.stderr, "--> Loading the VM (type = {0})...".format(self.type) # refresh config file self.create_config_file() mem_required = int(self.memory) * 1024 * 1024 qmemman_client = QMemmanClient() if not qmemman_client.request_memory(mem_required): qmemman_client.close() raise MemoryError ("ERROR: insufficient memory to start this VM") # Bind pci devices to pciback driver for pci in self.pcidevs: subprocess.check_call(['sudo', qubes_pciback_cmd, pci]) xl_cmdline = ['sudo', '/usr/sbin/xl', 'create', self.conf_file, '-q', '-p'] try: subprocess.check_call(xl_cmdline) except: raise QubesException("Failed to load VM config") xid = self.get_xid() self.xid = xid if verbose: print >> sys.stderr, "--> Setting Xen Store info for the VM..." self.create_xenstore_entries(xid) qvm_collection = QubesVmCollection() qvm_collection.lock_db_for_reading() qvm_collection.load() qvm_collection.unlock_db() if verbose: print >> sys.stderr, "--> Updating firewall rules..." for vm in qvm_collection.values(): if vm.is_proxyvm() and vm.is_running(): vm.write_iptables_xenstore_entry() if verbose: print >> sys.stderr, "--> Starting the VM..." xc.domain_unpause(xid) # close() is not really needed, because the descriptor is close-on-exec # anyway, the reason to postpone close() is that possibly xl is not done # constructing the domain after its main process exits # so we close() when we know the domain is up # the successful unpause is some indicator of it qmemman_client.close() if not preparing_dvm: if verbose: print >> sys.stderr, "--> Starting the qrexec daemon..." retcode = subprocess.call ([qrexec_daemon_path, str(xid)]) if (retcode != 0) : self.force_shutdown() raise OSError ("ERROR: Cannot execute qrexec_daemon!") if not preparing_dvm and os.path.exists('/var/run/shm.id'): self.start_guid(verbose=verbose) if preparing_dvm: if verbose: print >> sys.stderr, "--> Preparing config template for DispVM" self.create_config_file(file_path = self.dir_path + '/dvm.conf', prepare_dvm = True) # perhaps we should move it before unpause and fork? # FIXME: this uses obsolete xm api if debug_console: from xen.xm import console if verbose: print >> sys.stderr, "--> Starting debug console..." console.execConsole (xid) return xid def shutdown(self, force=False): if dry_run: return subprocess.call (['/usr/sbin/xl', 'shutdown', self.name]) #xc.domain_destroy(self.get_xid()) def force_shutdown(self): if dry_run: return subprocess.call (['/usr/sbin/xl', 'destroy', self.name]) #xc.domain_destroy(self.get_xid()) def remove_from_disk(self): if dry_run: return shutil.rmtree (self.dir_path) def get_xml_attrs(self): attrs = {} attrs["qid"] = str(self.qid) attrs["name"] = self.name attrs["dir_path"] = self.dir_path attrs["conf_file"] = self.relative_path(self.conf_file) attrs["root_img"] = self.relative_path(self.root_img) attrs["volatile_img"] = self.relative_path(self.volatile_img) attrs["private_img"] = self.relative_path(self.private_img) attrs["uses_default_netvm"] = str(self.uses_default_netvm) attrs["netvm_qid"] = str(self.netvm_vm.qid) if self.netvm_vm is not None else "none" attrs["installed_by_rpm"] = str(self.installed_by_rpm) attrs["template_qid"] = str(self.template_vm.qid) if self.template_vm and not self.is_updateable() else "none" attrs["updateable"] = str(self.updateable) attrs["label"] = self.label.name attrs["memory"] = str(self.memory) attrs["maxmem"] = str(self.maxmem) attrs["pcidevs"] = str(self.pcidevs) attrs["vcpus"] = str(self.vcpus) attrs["internal"] = str(self.internal) attrs["uses_default_kernel"] = str(self.uses_default_kernel) attrs["kernel"] = str(self.kernel) attrs["uses_default_kernelopts"] = str(self.uses_default_kernelopts) attrs["kernelopts"] = str(self.kernelopts) attrs["services"] = str(self.services) return attrs def create_xml_element(self): # Compatibility hack (Qubes*VM in type vs Qubes*Vm in XML)... rx_type = re.compile (r"VM") attrs = self.get_xml_attrs() element = xml.etree.ElementTree.Element( "Qubes" + rx_type.sub("Vm", self.type), **attrs) return element 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 if "label" not in kwargs or kwargs["label"] == None: kwargs["label"] = default_template_label super(QubesTemplateVm, self).__init__(**kwargs) dir_path = kwargs["dir_path"] # Clean image for root-cow and swap (AppVM side) self.clean_volatile_img = self.dir_path + "/" + default_clean_volatile_img # Image for template changes self.rootcow_img = self.dir_path + "/" + default_rootcow_img self.appmenus_templates_dir = self.dir_path + "/" + default_appmenus_templates_subdir self.appvms = QubesVmCollection() @property def type(self): return "TemplateVM" 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 TemplateVM {'{1}'} 'nonupdatable'".\ format (appvm.name, self.name)) self.updateable = 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_template_vm, verbose): if dry_run: return assert not src_template_vm.is_running(), "Attempt to clone a running Template VM!" if verbose: print >> sys.stderr, "--> Creating directory: {0}".format(self.dir_path) os.mkdir (self.dir_path) if verbose: print >> sys.stderr, "--> 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]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_template_vm.private_img, self.private_img)) if verbose: print >> sys.stderr, "--> 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]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_template_vm.root_img, self.root_img)) if verbose: print >> sys.stderr, "--> Copying the template's clean volatile image:\n{0} ==>\n{1}".\ format(src_template_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_template_vm.clean_volatile_img, self.clean_volatile_img]) if retcode != 0: raise IOError ("Error while copying {0} to {1}".\ format(src_template_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_volatile_img, self.volatile_img)) if verbose: print >> sys.stderr, "--> Copying the template's DispVM prerun script..." retcode = subprocess.call (["cp", src_template_vm.dir_path + '/dispvm-prerun.sh', self.dir_path + '/dispvm-prerun.sh']) if retcode != 0: raise IOError ("Error while copying DispVM prerun script") if verbose: print >> sys.stderr, "--> Copying the template's appmenus 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) if os.path.exists(src_template_vm.dir_path + '/' + qubes_whitelisted_appmenus): if verbose: print >> sys.stderr, "--> Copying whitelisted apps list: {0}".\ format(self.dir_path + '/' + qubes_whitelisted_appmenus) shutil.copy(src_template_vm.dir_path + '/' + qubes_whitelisted_appmenus, self.dir_path + '/' + qubes_whitelisted_appmenus) if os.path.exists(src_template_vm.dir_path + '/vm-' + qubes_whitelisted_appmenus): if verbose: print >> sys.stderr, "--> Copying default whitelisted apps list: {0}".\ format(self.dir_path + '/vm-' + qubes_whitelisted_appmenus) shutil.copy(src_template_vm.dir_path + '/vm-' + qubes_whitelisted_appmenus, self.dir_path + '/vm-' + qubes_whitelisted_appmenus) icon_path = "/usr/share/qubes/icons/template.png" if verbose: print >> sys.stderr, "--> Creating icon symlink: {0} -> {1}".format(self.icon_path, icon_path) os.symlink (icon_path, self.icon_path) # Create root-cow.img self.commit_changes(verbose=verbose) # Create appmenus self.create_appmenus(verbose, source_template = src_template_vm) def create_appmenus(self, verbose, source_template = None): if source_template is None: source_template = self.template_vm try: subprocess.check_call ([qubes_appmenu_create_cmd, self.appmenus_templates_dir, self.name, "vm-templates"]) except subprocess.CalledProcessError: print >> sys.stderr, "Ooops, there was a problem creating appmenus for {0} VM!".format (self.name) def remove_appmenus(self): subprocess.check_call ([qubes_appmenu_remove_cmd, self.name, "vm-templates"]) def pre_rename(self, new_name): self.remove_appmenus() def post_rename(self, old_name): self.create_appmenus(False) old_dirpath = 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 remove_from_disk(self): if dry_run: return self.remove_appmenus() super(QubesTemplateVm, self).remove_from_disk() 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 start(self, debug_console = False, verbose = False, preparing_dvm=False): if dry_run: return self.reset_volatile_storage(verbose=verbose) if not self.is_updateable(): raise QubesException ("Cannot start Template VM that is marked \"nonupdatable\"") # TODO?: check if none of running appvms are outdated return super(QubesTemplateVm, self).start(debug_console=debug_console, verbose=verbose) 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_vm.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() def get_xml_attrs(self): attrs = super(QubesTemplateVm, self).get_xml_attrs() attrs["clean_volatile_img"] = self.clean_volatile_img attrs["rootcow_img"] = self.rootcow_img return attrs class QubesNetVm(QubesVm): """ A class that represents a NetVM. A child of QubesCowVM. """ def __init__(self, **kwargs): netid = kwargs.pop("netid") self.netid = netid self.__network = "10.137.{0}.0".format(netid) self.netprefix = "10.137.{0}.".format(netid) self.dispnetprefix = "10.138.{0}.".format(netid) self.__netmask = vm_default_netmask self.__gateway = self.netprefix + "1" self.__secondary_dns = self.netprefix + "254" if "dir_path" not in kwargs or kwargs["dir_path"] is None: kwargs["dir_path"] = qubes_servicevms_dir + "/" + kwargs["name"] self.__external_ip_allowed_xids = set() if "label" not in kwargs or kwargs["label"] is None: kwargs["label"] = default_servicevm_label if "vcpus" not in kwargs or kwargs["vcpus"] is None: kwargs["vcpus"] = default_servicevm_vcpus if "memory" not in kwargs or kwargs["memory"] is None: kwargs["memory"] = 200 kwargs["maxmem"] = kwargs["memory"] super(QubesNetVm, self).__init__(**kwargs) self.connected_vms = QubesVmCollection() @property def type(self): return "NetVM" @property def gateway(self): return self.__gateway @property def secondary_dns(self): return self.__secondary_dns @property def netmask(self): return self.__netmask @property def network(self): return self.__network def get_ip_for_vm(self, qid): lo = qid % 253 + 2 assert lo >= 2 and lo <= 254, "Wrong IP address for VM" return self.netprefix + "{0}".format(lo) def get_ip_for_dispvm(self, dispid): lo = dispid % 254 + 1 assert lo >= 1 and lo <= 254, "Wrong IP address for VM" return self.dispnetprefix + "{0}".format(lo) def create_xenstore_entries(self, xid = None): if dry_run: return if xid is None: xid = self.xid super(QubesNetVm, self).create_xenstore_entries(xid) xs.write('', "/local/domain/{0}/qubes_netvm_external_ip".format(xid), '') self.update_external_ip_permissions(xid) def update_external_ip_permissions(self, xid = -1): if xid < 0: xid = self.get_xid() if xid < 0: return command = [ "/usr/bin/xenstore-chmod", "/local/domain/{0}/qubes_netvm_external_ip".format(xid) ] command.append("n{0}".format(xid)) for id in self.__external_ip_allowed_xids: command.append("r{0}".format(id)) return subprocess.check_call(command) def start(self, debug_console = False, verbose = False, preparing_dvm=False): if dry_run: return xid=super(QubesNetVm, self).start(debug_console=debug_console, verbose=verbose) # Connect vif's of already running VMs for vm in self.connected_vms.values(): if not vm.is_running(): continue if verbose: print >> sys.stderr, "--> Attaching network to '{0}'...".format(vm.name) # Cleanup stale VIFs vm.cleanup_vifs() # wait for frontend to forget about this device (UGLY HACK) time.sleep(0.2) try: vm.attach_network(wait=False) except QubesException as ex: print >> sys.stderr, ("WARNING: Cannot attach to network to '{0}': {1}".format(vm.name, ex)) return xid def shutdown(self, force=False): if dry_run: return connected_vms = [vm for vm in self.connected_vms.values() if vm.is_running()] if connected_vms and not force: raise QubesException("There are other VMs connected to this VM: " + str([vm.name for vm in connected_vms])) super(QubesNetVm, self).shutdown(force=force) def add_external_ip_permission(self, xid): if int(xid) < 0: return self.__external_ip_allowed_xids.add(int(xid)) self.update_external_ip_permissions() def remove_external_ip_permission(self, xid): self.__external_ip_allowed_xids.discard(int(xid)) self.update_external_ip_permissions() def get_xml_attrs(self): attrs = super(QubesNetVm, self).get_xml_attrs() attrs.pop("netvm_qid") attrs.pop("uses_default_netvm") attrs["netid"] = str(self.netid) return attrs class QubesProxyVm(QubesNetVm): """ A class that represents a ProxyVM, ex FirewallVM. A child of QubesNetVM. """ def __init__(self, **kwargs): kwargs["uses_default_netvm"] = False super(QubesProxyVm, self).__init__(**kwargs) self.rules_applied = None @property def type(self): return "ProxyVM" def start(self, debug_console = False, verbose = False, preparing_dvm = False): if dry_run: return retcode = super(QubesProxyVm, self).start(debug_console=debug_console, verbose=verbose, preparing_dvm=preparing_dvm) self.netvm_vm.add_external_ip_permission(self.get_xid()) self.write_netvm_domid_entry() return retcode def force_shutdown(self): if dry_run: return self.netvm_vm.remove_external_ip_permission(self.get_xid()) super(QubesProxyVm, self).force_shutdown() def create_xenstore_entries(self, xid = None): if dry_run: return if xid is None: xid = self.xid super(QubesProxyVm, self).create_xenstore_entries(xid) xs.write('', "/local/domain/{0}/qubes_iptables_error".format(xid), '') xs.set_permissions('', "/local/domain/{0}/qubes_iptables_error".format(xid), [{ 'dom': xid, 'write': True }]) self.write_iptables_xenstore_entry() def write_netvm_domid_entry(self, xid = -1): if xid < 0: xid = self.get_xid() xs.write('', "/local/domain/{0}/qubes_netvm_domid".format(xid), "{0}".format(self.netvm_vm.get_xid())) def write_iptables_xenstore_entry(self): xs.rm('', "/local/domain/{0}/qubes_iptables_domainrules".format(self.get_xid())) iptables = "# Generated by Qubes Core on {0}\n".format(datetime.now().ctime()) iptables += "*filter\n" iptables += ":INPUT DROP [0:0]\n" iptables += ":FORWARD DROP [0:0]\n" iptables += ":OUTPUT ACCEPT [0:0]\n" # Strict INPUT rules iptables += "-A INPUT -i vif+ -p udp -m udp --dport 68 -j DROP\n" iptables += "-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n" iptables += "-A INPUT -p icmp -j ACCEPT\n" iptables += "-A INPUT -i lo -j ACCEPT\n" iptables += "-A INPUT -j REJECT --reject-with icmp-host-prohibited\n" iptables += "-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT\n" # Allow dom0 networking iptables += "-A FORWARD -i vif0.0 -j ACCEPT\n" # Deny inter-VMs networking iptables += "-A FORWARD -i vif+ -o vif+ -j DROP\n" iptables += "COMMIT\n" xs.write('', "/local/domain/{0}/qubes_iptables_header".format(self.get_xid()), iptables) vms = [vm for vm in self.connected_vms.values()] for vm in vms: iptables="*filter\n" if vm.has_firewall(): conf = vm.get_firewall_conf() else: conf = { "rules": list(), "allow": True, "allowDns": True, "allowIcmp": True } xid = vm.get_xid() if xid < 0: # VM not active ATM continue iptables += "# '{0}' VM:\n".format(vm.name) iptables += "-A FORWARD ! -s {0}/32 -i vif{1}.+ -j DROP\n".format(vm.ip, xid) accept_action = "ACCEPT" reject_action = "REJECT --reject-with icmp-host-prohibited" if conf["allow"]: default_action = accept_action rules_action = reject_action else: default_action = reject_action rules_action = accept_action for rule in conf["rules"]: iptables += "-A FORWARD -i vif{0}.+ -d {1}".format(xid, rule["address"]) if rule["netmask"] != 32: iptables += "/{0}".format(rule["netmask"]) if rule["portBegin"] is not None and rule["portBegin"] > 0: iptables += " -p tcp --dport {0}".format(rule["portBegin"]) if rule["portEnd"] is not None and rule["portEnd"] > rule["portBegin"]: iptables += ":{0}".format(rule["portEnd"]) iptables += " -j {0}\n".format(rules_action) if conf["allowDns"]: # PREROUTING does DNAT to NetVM DNSes, so we need self.netvm_vm. properties iptables += "-A FORWARD -i vif{0}.+ -p udp -d {1} --dport 53 -j ACCEPT\n".format(xid,self.netvm_vm.gateway) iptables += "-A FORWARD -i vif{0}.+ -p udp -d {1} --dport 53 -j ACCEPT\n".format(xid,self.netvm_vm.secondary_dns) if conf["allowIcmp"]: iptables += "-A FORWARD -i vif{0}.+ -p icmp -j ACCEPT\n".format(xid) iptables += "-A FORWARD -i vif{0}.+ -j {1}\n".format(xid, default_action) iptables += "COMMIT\n" xs.write('', "/local/domain/"+str(self.get_xid())+"/qubes_iptables_domainrules/"+str(xid), iptables) # no need for ending -A FORWARD -j DROP, cause default action is DROP self.write_netvm_domid_entry() self.rules_applied = None xs.write('', "/local/domain/{0}/qubes_iptables".format(self.get_xid()), 'reload') def get_xml_attrs(self): attrs = super(QubesProxyVm, self).get_xml_attrs() attrs["netvm_qid"] = str(self.netvm_vm.qid) if self.netvm_vm is not None else "none" return attrs class QubesDom0NetVm(QubesNetVm): def __init__(self): super(QubesDom0NetVm, self).__init__(qid=0, name="dom0", netid=0, dir_path=None, private_img = None, template_vm = None, label = default_template_label) self.xid = 0 def is_running(self): return True 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 @property def ip(self): return "10.137.0.1" def start(self, debug_console = False, verbose = False): raise QubesException ("Cannot start Dom0 fake domain!") def get_xl_dominfo(self): if dry_run: return domains = xl_ctx.list_domains() for dominfo in domains: if dominfo.domid == 0: return dominfo return None def get_xc_dominfo(self): if dry_run: return domains = xc.domain_getinfo(0, 1) return domains[0] def create_xml_element(self): return None def verify_files(self): return True class QubesDisposableVm(QubesVm): """ A class that represents an DisposableVM. A child of QubesVm. """ def __init__(self, **kwargs): template_vm = kwargs["template_vm"] assert template_vm is not None, "Missing template_vm for DisposableVM!" self.dispid = kwargs.pop("dispid") super(QubesDisposableVm, self).__init__(dir_path="/nonexistent", **kwargs) @property def type(self): return "DisposableVM" @property def ip(self): if self.netvm_vm is not None: return self.netvm_vm.get_ip_for_dispvm(self.dispid) else: return None def get_xml_attrs(self): attrs = {} attrs["qid"] = str(self.qid) attrs["name"] = self.name attrs["dispid"] = str(self.dispid) attrs["template_qid"] = str(self.template_vm.qid) attrs["label"] = self.label.name attrs["firewall_conf"] = self.relative_path(self.firewall_conf) return attrs 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"] super(QubesAppVm, self).__init__(**kwargs) @property def type(self): return "AppVM" def create_on_disk(self, verbose, source_template = None): if dry_run: return super(QubesAppVm, self).create_on_disk(verbose, source_template=source_template) if self.is_updateable(): if verbose: print >> sys.stderr, "--> Copying the template's appmenus templates dir:\n{0} ==>\n{1}".\ format(source_template.appmenus_templates_dir, self.appmenus_templates_dir) shutil.copytree (source_template.appmenus_templates_dir, self.appmenus_templates_dir) if verbose: print >> sys.stderr, "--> Creating icon symlink: {0} -> {1}".format(self.icon_path, self.label.icon_path) os.symlink (self.label.icon_path, self.icon_path) if not self.internal: self.create_appmenus (verbose, source_template=source_template) def remove_from_disk(self): if dry_run: return self.remove_appmenus() super(QubesAppVm, self).remove_from_disk() def pre_rename(self, new_name): self.remove_appmenus() def post_rename(self, old_name): self.create_appmenus(False) class QubesVmCollection(dict): """ A collection of Qubes VMs indexed by Qubes id (qid) """ def __init__(self, store_filename=qubes_store_filename): super(QubesVmCollection, self).__init__() self.default_netvm_qid = None self.default_fw_netvm_qid = None self.default_template_qid = None self.default_kernel = None self.updatevm_qid = None self.qubes_store_filename = store_filename self.clockvm_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, updateable = False, 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(), kernel = self.get_default_kernel(), uses_default_kernel = True, updateable=updateable, label=label) if not self.verify_new_vm (vm): assert False, "Wrong VM description!" self[vm.qid]=vm return vm def add_new_disposablevm(self, name, template_vm, dispid, label = None): qid = self.get_new_unused_qid() vm = QubesDisposableVm (qid=qid, name=name, template_vm=template_vm, netvm_vm = self.get_default_netvm_vm(), label=label, dispid=dispid) 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(), kernel = self.get_default_kernel(), uses_default_kernel = True) 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, template_vm, dir_path = None, conf_file = None, private_img = None, installed_by_rpm = False, label = None, updateable = False): qid = self.get_new_unused_qid() netid = self.get_new_unused_netid() vm = QubesNetVm (qid=qid, name=name, template_vm=template_vm, netid=netid, label=label, private_img=private_img, installed_by_rpm=installed_by_rpm, updateable=updateable, kernel = self.get_default_kernel(), uses_default_kernel = True, dir_path=dir_path, conf_file=conf_file) if not self.verify_new_vm (vm): assert False, "Wrong VM description!" self[vm.qid]=vm if self.default_fw_netvm_qid is None: self.set_default_fw_netvm_vm(vm) # by default ClockVM is the first NetVM if self.clockvm_qid is None: self.set_clockvm_vm(vm) return vm def add_new_proxyvm(self, name, template_vm, dir_path = None, conf_file = None, private_img = None, installed_by_rpm = False, label = None, updateable = False): qid = self.get_new_unused_qid() netid = self.get_new_unused_netid() vm = QubesProxyVm (qid=qid, name=name, template_vm=template_vm, netid=netid, label=label, private_img=private_img, installed_by_rpm=installed_by_rpm, dir_path=dir_path, conf_file=conf_file, updateable=updateable, kernel = self.get_default_kernel(), uses_default_kernel = True, netvm_vm = self.get_default_fw_netvm_vm()) 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) if self.updatevm_qid is None: self.set_updatevm_vm(vm) return vm def set_default_template_vm(self, vm): assert vm.is_template(), "VM {0} is not a TemplateVM!".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} does not provide network!".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 set_default_kernel(self, kernel): assert os.path.exists(qubes_kernels_base_dir + '/' + kernel), "Kerel {0} not installed!".format(kernel) self.default_kernel = kernel def get_default_kernel(self): return self.default_kernel def set_default_fw_netvm_vm(self, vm): assert vm.is_netvm(), "VM {0} does not provide network!".format(vm.name) self.default_fw_netvm_qid = vm.qid def get_default_fw_netvm_vm(self): if self.default_fw_netvm_qid is None: return None else: return self[self.default_fw_netvm_qid] def set_updatevm_vm(self, vm): self.updatevm_qid = vm.qid def get_updatevm_vm(self): if self.updatevm_qid is None: return None else: return self[self.updatevm_qid] def set_clockvm_vm(self, vm): self.clockvm_qid = vm.qid def get_clockvm_vm(self): if self.clockvm_qid is None: return None else: return self[self.clockvm_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.template_vm and vm.template_vm.qid == template_qid)]) return vms def get_vms_connected_to(self, netvm_qid): new_vms = [ netvm_qid ] dependend_vms_qid = [] # Dependency resolving only makes sense on NetVM (or derivative) if not self[netvm_qid].is_netvm(): return set([]) while len(new_vms) > 0: cur_vm = new_vms.pop() for vm in self[cur_vm].connected_vms.values(): if vm.qid not in dependend_vms_qid: dependend_vms_qid.append(vm.qid) if vm.is_netvm(): new_vms.append(vm.qid) vms = [vm for vm in self.values() if vm.qid in dependend_vms_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 >> sys.stderr, "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 >> sys.stderr, "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 (self.qubes_store_filename, 'r') except IOError: return False f.close() return True def create_empty_storage(self): self.qubes_store_file = open (self.qubes_store_filename, 'w') self.clear() self.save() def lock_db_for_reading(self): self.qubes_store_file = open (self.qubes_store_filename, 'r') fcntl.lockf (self.qubes_store_file, fcntl.LOCK_SH) def lock_db_for_writing(self): self.qubes_store_file = open (self.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", default_fw_netvm=str(self.default_fw_netvm_qid) \ if self.default_fw_netvm_qid is not None else "None", updatevm=str(self.updatevm_qid) \ if self.updatevm_qid is not None else "None", clockvm=str(self.clockvm_qid) \ if self.clockvm_qid is not None else "None", default_kernel=str(self.default_kernel) \ if self.default_kernel 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}: export error: {1}".format( os.path.basename(sys.argv[0]), err)) return False return True def parse_xml_element(self, element): kwargs = {} common_attr_list = ("qid", "name", "dir_path", "conf_file", "private_img", "root_img", "template_qid", "installed_by_rpm", "updateable", "internal", "uses_default_netvm", "label", "memory", "vcpus", "pcidevs", "maxmem", "kernel", "uses_default_kernel", "kernelopts", "uses_default_kernelopts", "services" ) for attribute in common_attr_list: kwargs[attribute] = element.get(attribute) if kwargs[attribute] is None: kwargs.pop(attribute) kwargs["qid"] = int(kwargs["qid"]) if "updateable" in kwargs: kwargs["updateable"] = True if kwargs["updateable"] == "True" else False if "installed_by_rpm" in kwargs: kwargs["installed_by_rpm"] = True if kwargs["installed_by_rpm"] == "True" else False if "internal" in kwargs: kwargs["internal"] = True if kwargs["internal"] == "True" else False if "template_qid" in kwargs: if kwargs["template_qid"] == "none" or kwargs["template_qid"] is None: kwargs.pop("template_qid") else: kwargs["template_qid"] = int(kwargs["template_qid"]) template_vm = self[kwargs.pop("template_qid")] if template_vm is None: print >> sys.stderr, "ERROR: VM '{0}' uses unkown template qid='{1}'!".\ format(kwargs["name"], kwargs["template_qid"]) else: kwargs["template_vm"] = template_vm if "label" in kwargs: if kwargs["label"] not in QubesVmLabels: print >> sys.stderr, "ERROR: incorrect label for VM '{0}'".format(kwargs["name"]) kwargs.pop ("label") else: kwargs["label"] = QubesVmLabels[kwargs["label"]] if "kernel" in kwargs and kwargs["kernel"] == "None": kwargs["kernel"] = None if "uses_default_kernel" in kwargs: kwargs["uses_default_kernel"] = True if kwargs["uses_default_kernel"] == "True" else False else: # For backward compatibility kwargs["uses_default_kernel"] = False if kwargs["uses_default_kernel"]: kwargs["kernel"] = self.get_default_kernel() else: if "kernel" in kwargs and kwargs["kernel"]=="None": kwargs["kernel"]=None # for other cases - generic assigment is ok if "uses_default_kernelopts" in kwargs: kwargs["uses_default_kernelopts"] = False if kwargs["uses_default_kernelopts"] == "False" else True if "kernelopts" not in kwargs or kwargs["kernelopts"] == "None": kwargs.pop("kernelopts") kwargs["uses_default_kernelopts"] = True return kwargs def set_netvm_dependency(self, element): kwargs = {} attr_list = ("qid", "uses_default_netvm", "netvm_qid") for attribute in attr_list: kwargs[attribute] = element.get(attribute) vm = self[int(kwargs["qid"])] if "uses_default_netvm" not in kwargs: vm.uses_default_netvm = True else: vm.uses_default_netvm = True if kwargs["uses_default_netvm"] == "True" else False if vm.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] vm.netvm_vm = netvm_vm if netvm_vm: netvm_vm.connected_vms[vm.qid] = vm 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 default_fw_netvm = element.get("default_fw_netvm") if default_fw_netvm is not None: self.default_fw_netvm_qid = int(default_fw_netvm) \ if default_fw_netvm != "None" else None #assert self.default_netvm_qid is not None updatevm = element.get("updatevm") if updatevm is not None: self.updatevm_qid = int(updatevm) \ if updatevm != "None" else None #assert self.default_netvm_qid is not None clockvm = element.get("clockvm") if clockvm is not None: self.clockvm_qid = int(clockvm) \ if clockvm != "None" else None self.default_kernel = element.get("default_kernel") # Then, read in the TemplateVMs, because a reference to template VM # is needed to create each AppVM for element in tree.findall("QubesTemplateVm"): try: kwargs = self.parse_xml_element(element) 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 # 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 = self.parse_xml_element(element) # Add NetVM specific fields attr_list = ("netid",) for attribute in attr_list: kwargs[attribute] = element.get(attribute) 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 # Next read in the ProxyVMs, because they may be referenced # by other VMs for element in tree.findall("QubesProxyVm"): try: kwargs = self.parse_xml_element(element) # Add ProxyVM specific fields attr_list = ("netid",) for attribute in attr_list: kwargs[attribute] = element.get(attribute) kwargs["netid"] = int(kwargs["netid"]) vm = QubesProxyVm(**kwargs) self[vm.qid] = vm except (ValueError, LookupError) as err: print("{0}: import error (QubesProxyVM) {1}".format( os.path.basename(sys.argv[0]), err)) return False # After importing all NetVMs and ProxyVMs, set netvm references # 1. For TemplateVMs for element in tree.findall("QubesTemplateVm"): try: self.set_netvm_dependency(element) except (ValueError, LookupError) as err: print("{0}: import error (QubesTemplateVm): {1}".format( os.path.basename(sys.argv[0]), err)) return False # 2. For PoxyVMs for element in tree.findall("QubesProxyVm"): try: self.set_netvm_dependency(element) except (ValueError, LookupError) as err: print("{0}: import error (QubesProxyVM) {1}".format( os.path.basename(sys.argv[0]), err)) return False # Finally, read in the AppVMs for element in tree.findall("QubesAppVm"): try: kwargs = self.parse_xml_element(element) vm = QubesAppVm(**kwargs) self[vm.qid] = vm self.set_netvm_dependency(element) except (ValueError, LookupError) as err: print("{0}: import error (QubesAppVm): {1}".format( os.path.basename(sys.argv[0]), err)) return False # Really finally, read in the DisposableVMs for element in tree.findall("QubesDisposableVm"): try: kwargs = {} attr_list = ("qid", "name", "template_qid", "label", "dispid", "firewall_conf" ) for attribute in attr_list: kwargs[attribute] = element.get(attribute) kwargs["qid"] = int(kwargs["qid"]) kwargs["dispid"] = int(kwargs["dispid"]) kwargs["template_qid"] = int(kwargs["template_qid"]) template_vm = self[kwargs.pop("template_qid")] if template_vm is None: print >> sys.stderr, "ERROR: DisposableVM '{0}' uses unkown template qid='{1}'!".\ format(kwargs["name"], kwargs["template_qid"]) else: kwargs["template_vm"] = template_vm kwargs["netvm_vm"] = self.get_default_netvm_vm() if kwargs["label"] is not None: if kwargs["label"] not in QubesVmLabels: print >> sys.stderr, "ERROR: incorrect label for VM '{0}'".format(kwargs["name"]) kwargs.pop ("label") else: kwargs["label"] = QubesVmLabels[kwargs["label"]] vm = QubesDisposableVm(**kwargs) self[vm.qid] = vm except (ValueError, LookupError) as err: print("{0}: import error (DisposableAppVm): {1}".format( os.path.basename(sys.argv[0]), err)) return False # if there was no clockvm entry in qubes.xml, try to determine default: # root of default NetVM chain if clockvm is None: if self.default_netvm_qid is not None: clockvm = self[self.default_netvm_qid] # Find root of netvm chain while clockvm.netvm_vm is not None: clockvm = clockvm.netvm_vm self.clockvm_qid = clockvm.qid # Enable ntpd in ClockVM if self.clockvm_qid is not None: self[self.clockvm_qid].services['ntpd'] = True return True def pop(self, qid): if self.default_netvm_qid == qid: self.default_netvm_qid = None if self.default_fw_netvm_qid == qid: self.default_fw_netvm_qid = None if self.clockvm_qid == qid: self.clockvm_qid = None if self.updatevm_qid == qid: self.updatevm_qid = None if self.default_template_qid == qid: self.default_template_qid = None return super(QubesVmCollection, self).pop(qid) 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 >> sys.stderr, "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 >> sys.stderr, "{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() # vim:sw=4:et: