#!/usr/bin/python # -*- coding: utf-8 -*- # # The Qubes OS Project, http://www.qubes-os.org # # Copyright (C) 2013 Marek Marczykowski-Górecki # Copyright (C) 2013 Olivier Médoc # # 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. # # from qubes import QubesException,QubesVmCollection from qubes import QubesVmClasses from qubes import system_path,vm_files from qubesutils import size_to_human, print_stdout, print_stderr import sys import os import subprocess import re import shutil import tempfile import time import grp,pwd from multiprocessing import Queue,Process BACKUP_DEBUG = True def get_disk_usage(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 file_to_backup (file_path, sz = None): if sz is None: sz = get_disk_usage (file_path) abs_file_path = os.path.abspath (file_path) abs_base_dir = os.path.abspath (system_path["qubes_base_dir"]) + '/' abs_file_dir = os.path.dirname (abs_file_path) + '/' (nothing, dir, subdir) = abs_file_dir.partition (abs_base_dir) assert nothing == "" assert dir == abs_base_dir return [ { "path" : file_path, "size": sz, "subdir": subdir} ] def backup_prepare(vms_list = None, exclude_list = [], print_callback = print_stdout): """If vms = None, include all (sensible) VMs; exclude_list is always applied""" files_to_backup = file_to_backup (system_path["qubes_store_filename"]) if exclude_list is None: exclude_list = [] qvm_collection = QubesVmCollection() qvm_collection.lock_db_for_writing() qvm_collection.load() if vms_list is None: all_vms = [vm for vm in qvm_collection.values()] selected_vms = [vm for vm in all_vms if vm.include_in_backups] appvms_to_backup = [vm for vm in selected_vms if vm.is_appvm() and not vm.internal] netvms_to_backup = [vm for vm in selected_vms if vm.is_netvm() and not vm.qid == 0] template_vms_worth_backingup = [vm for vm in selected_vms if (vm.is_template() and not vm.installed_by_rpm)] vms_list = appvms_to_backup + netvms_to_backup + template_vms_worth_backingup vms_for_backup = vms_list # Apply exclude list if exclude_list: vms_for_backup = [vm for vm in vms_list if vm.name not in exclude_list] no_vms = len (vms_for_backup) there_are_running_vms = False fields_to_display = [ { "name": "VM", "width": 16}, { "name": "type","width": 12 }, { "name": "size", "width": 12} ] # Display the header s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(f["width"] + 1) s += fmt.format('-') print_callback(s) s = "" for f in fields_to_display: fmt="{{0:>{0}}} |".format(f["width"] + 1) s += fmt.format(f["name"]) print_callback(s) s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(f["width"] + 1) s += fmt.format('-') print_callback(s) for vm in vms_for_backup: if vm.is_template(): # handle templates later continue if vm.private_img is not None: vm_sz = vm.get_disk_usage (vm.private_img) files_to_backup += file_to_backup(vm.private_img, vm_sz ) if vm.is_appvm(): files_to_backup += file_to_backup(vm.icon_path) if vm.updateable: if os.path.exists(vm.dir_path + "/apps.templates"): # template files_to_backup += file_to_backup(vm.dir_path + "/apps.templates") else: # standaloneVM files_to_backup += file_to_backup(vm.dir_path + "/apps") if os.path.exists(vm.dir_path + "/kernels"): files_to_backup += file_to_backup(vm.dir_path + "/kernels") if os.path.exists (vm.firewall_conf): files_to_backup += file_to_backup(vm.firewall_conf) if 'appmenus_whitelist' in vm_files and \ os.path.exists(vm.dir_path + vm_files['appmenus_whitelist']): files_to_backup += file_to_backup(vm.dir_path + vm_files['appmenus_whitelist']) if vm.updateable: sz = vm.get_disk_usage(vm.root_img) files_to_backup += file_to_backup(vm.root_img, sz) vm_sz += sz s = "" fmt="{{0:>{0}}} |".format(fields_to_display[0]["width"] + 1) s += fmt.format(vm.name) fmt="{{0:>{0}}} |".format(fields_to_display[1]["width"] + 1) if vm.is_netvm(): s += fmt.format("NetVM" + (" + Sys" if vm.updateable else "")) else: s += fmt.format("AppVM" + (" + Sys" if vm.updateable else "")) fmt="{{0:>{0}}} |".format(fields_to_display[2]["width"] + 1) s += fmt.format(size_to_human(vm_sz)) if vm.is_running(): s += " <-- The VM is running, please shut it down before proceeding with the backup!" there_are_running_vms = True print_callback(s) for vm in vms_for_backup: if not vm.is_template(): # already handled continue vm_sz = vm.get_disk_utilization() files_to_backup += file_to_backup (vm.dir_path, vm_sz) s = "" fmt="{{0:>{0}}} |".format(fields_to_display[0]["width"] + 1) s += fmt.format(vm.name) fmt="{{0:>{0}}} |".format(fields_to_display[1]["width"] + 1) s += fmt.format("Template VM") fmt="{{0:>{0}}} |".format(fields_to_display[2]["width"] + 1) s += fmt.format(size_to_human(vm_sz)) if vm.is_running(): s += " <-- The VM is running, please shut it down before proceeding with the backup!" there_are_running_vms = True print_callback(s) # Initialize backup flag on all VMs vms_for_backup_qid = [vm.qid for vm in vms_for_backup] for vm in qvm_collection.values(): vm.backup_content = False if vm.qid in vms_for_backup_qid: vm.backup_content = True vm.backup_size = vm.get_disk_utilization() vm.backup_path = os.path.relpath(vm.dir_path, system_path["qubes_base_dir"]) # Dom0 user home if not 'dom0' in exclude_list: local_user = grp.getgrnam('qubes').gr_mem[0] home_dir = pwd.getpwnam(local_user).pw_dir # Home dir should have only user-owned files, so fix it now to prevent # permissions problems - some root-owned files can left after # 'sudo bash' and similar commands subprocess.check_call(['sudo', 'chown', '-R', local_user, home_dir]) home_sz = get_disk_usage(home_dir) home_to_backup = [ { "path" : home_dir, "size": home_sz, "subdir": 'dom0-home/'} ] files_to_backup += home_to_backup vm = qvm_collection[0] vm.backup_content = True vm.backup_size = home_sz vm.backup_path = os.path.join('dom0-home', os.path.basename(home_dir)) s = "" fmt="{{0:>{0}}} |".format(fields_to_display[0]["width"] + 1) s += fmt.format('Dom0') fmt="{{0:>{0}}} |".format(fields_to_display[1]["width"] + 1) s += fmt.format("User home") fmt="{{0:>{0}}} |".format(fields_to_display[2]["width"] + 1) s += fmt.format(size_to_human(home_sz)) print_callback(s) qvm_collection.save() # FIXME: should be after backup completed qvm_collection.unlock_db() total_backup_sz = 0 for file in files_to_backup: total_backup_sz += file["size"] s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(f["width"] + 1) s += fmt.format('-') print_callback(s) s = "" fmt="{{0:>{0}}} |".format(fields_to_display[0]["width"] + 1) s += fmt.format("Total size:") fmt="{{0:>{0}}} |".format(fields_to_display[1]["width"] + 1 + 2 + fields_to_display[2]["width"] + 1) s += fmt.format(size_to_human(total_backup_sz)) print_callback(s) s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(f["width"] + 1) s += fmt.format('-') print_callback(s) if (there_are_running_vms): raise QubesException("Please shutdown all VMs before proceeding.") return files_to_backup class Send_Worker(Process): def __init__(self, queue, base_dir, backup_stdout): super(Send_Worker, self).__init__() self.queue = queue self.base_dir = base_dir self.backup_stdout = backup_stdout def run(self): if BACKUP_DEBUG: print "Started sending thread" if BACKUP_DEBUG: print "Moving to temporary dir", self.base_dir os.chdir(self.base_dir) for filename in iter(self.queue.get,None): if filename == "FINISHED": break if BACKUP_DEBUG: print "Sending file", filename # This tar used for sending data out need to be as simple, as # simple, as featureless as possible. It will not be # verified before untaring. tar_final_cmd = ["tar", "-cO", "--posix", "-C", self.base_dir, filename] final_proc = subprocess.Popen (tar_final_cmd, stdin=subprocess.PIPE, stdout=self.backup_stdout) final_proc.wait() # Delete the file as we don't need it anymore if BACKUP_DEBUG: print "Removing file", filename os.remove(filename) if BACKUP_DEBUG: print "Finished sending thread" def backup_do(base_backup_dir, files_to_backup, passphrase,\ progress_callback = None, encrypt=False, appvm=None): total_backup_sz = 0 for file in files_to_backup: total_backup_sz += file["size"] vmproc = None if appvm != None: # Prepare the backup target (Qubes service call) backup_target = "QUBESRPC qubes.Backup none" # If APPVM, STDOUT is a PIPE vmproc = appvm.run(command = backup_target, passio_popen = True) vmproc.stdin.write(base_backup_dir.\ replace("\r","").replace("\n","")+"\n") backup_stdout = vmproc.stdin else: # Prepare the backup target (local file) backup_target = base_backup_dir + "/qubes-{0}".\ format (time.strftime("%Y-%m-%d-%H%M%S")) # Create the target directory if not os.path.exists (base_backup_dir): raise QubesException( "ERROR: the backup directory {0} does not exists".\ format(base_backup_dir)) # If not APPVM, STDOUT is a local file backup_stdout = open(backup_target,'wb') global blocks_backedup blocks_backedup = 0 progress = blocks_backedup * 11 / total_backup_sz progress_callback(progress) feedback_file = tempfile.NamedTemporaryFile() backup_tmpdir = tempfile.mkdtemp(prefix="/var/tmp/backup_") # Tar with tapelength does not deals well with stdout (close stdout between # two tapes) # For this reason, we will use named pipes instead if BACKUP_DEBUG: print "Working in", backup_tmpdir backup_pipe = os.path.join(backup_tmpdir,"backup_pipe") if BACKUP_DEBUG: print "Creating pipe in:", backup_pipe os.mkfifo(backup_pipe) if BACKUP_DEBUG: print "Will backup:", files_to_backup # Setup worker to send encrypted data chunks to the backup_target def compute_progress(new_size, total_backup_sz): global blocks_backedup blocks_backedup += new_size progress = blocks_backedup / float(total_backup_sz) progress_callback(int(round(progress*100,2))) to_send = Queue(10) send_proc = Send_Worker(to_send, backup_tmpdir, backup_stdout) send_proc.start() for filename in files_to_backup: if BACKUP_DEBUG: print "Backing up", filename backup_tempfile = os.path.join(backup_tmpdir, filename["subdir"], os.path.basename(filename["path"])) if BACKUP_DEBUG: print "Using temporary location:", backup_tempfile # Ensure the temporary directory exists if not os.path.isdir(os.path.dirname(backup_tempfile)): os.makedirs(os.path.dirname(backup_tempfile)) # The first tar cmd can use any complex feature as we want. Files will # be verified before untaring this. # Prefix the path in archive with filename["subdir"] to have it verified during untar tar_cmdline = ["tar", "-Pc", '--sparse', "-f", backup_pipe, '--tape-length', str(100000), '-C', os.path.dirname(filename["path"]), '--xform', 's:^[a-z]:%s\\0:' % filename["subdir"], os.path.basename(filename["path"]) ] if BACKUP_DEBUG: print " ".join(tar_cmdline) # Tips: Popen(bufsize=0) # Pipe: tar-sparse | encryptor [| hmac] | tar | backup_target # Pipe: tar-sparse [| hmac] | tar | backup_target tar_sparse = subprocess.Popen (tar_cmdline, stdin=subprocess.PIPE) # Wait for compressor (tar) process to finish or for any error of other # subprocesses i = 0 run_error = "paused" running = [] while run_error == "paused": pipe = open(backup_pipe,'rb') # Start HMAC hmac = subprocess.Popen (["openssl", "dgst", "-hmac", passphrase], stdin=subprocess.PIPE, stdout=subprocess.PIPE) # Prepare a first chunk chunkfile = backup_tempfile + "." + "%03d" % i i += 1 chunkfile_p = open(chunkfile,'wb') common_args = { 'backup_target': chunkfile_p, 'total_backup_sz': total_backup_sz, 'hmac': hmac, 'vmproc': vmproc, 'addproc': tar_sparse } if encrypt: # Start encrypt # If no cipher is provided, the data is forwarded unencrypted !!! encryptor = subprocess.Popen (["openssl", "enc", "-e", "-aes-256-cbc", "-pass", "pass:"+passphrase], stdin=pipe, stdout=subprocess.PIPE) run_error = wait_backup_feedback( progress_callback=compute_progress, in_stream=encryptor.stdout, streamproc=encryptor, **common_args) else: run_error = wait_backup_feedback( progress_callback=compute_progress, in_stream=pipe, streamproc=None, **common_args) chunkfile_p.close() if BACKUP_DEBUG: print "Wait_backup_feedback returned:", run_error if len(run_error) > 0: send_proc.terminate() raise QubesException("Failed to perform backup: error with "+ \ run_error) # Send the chunk to the backup target to_send.put(os.path.relpath(chunkfile, backup_tmpdir)) # Close HMAC hmac.stdin.close() hmac.wait() if BACKUP_DEBUG: print "HMAC proc return code:", hmac.poll() # Write HMAC data next to the chunk file hmac_data = hmac.stdout.read() if BACKUP_DEBUG: print "Writing hmac to", chunkfile+".hmac" hmac_file = open(chunkfile+".hmac",'w') hmac_file.write(hmac_data) hmac_file.flush() hmac_file.close() pipe.close() # Send the HMAC to the backup target to_send.put(os.path.relpath(chunkfile, backup_tmpdir)+".hmac") if tar_sparse.poll() == None: # Release the next chunk if BACKUP_DEBUG: print "Release next chunk for process:", tar_sparse.poll() #tar_sparse.stdout = subprocess.PIPE tar_sparse.stdin.write("\n") tar_sparse.stdin.flush() run_error="paused" else: if BACKUP_DEBUG: print "Finished tar sparse with error", tar_sparse.poll() to_send.put("FINISHED") send_proc.join() if send_proc.exitcode != 0: raise QubesException("Failed to send backup: error in the sending process") if vmproc: if BACKUP_DEBUG: print "VMProc1 proc return code:", vmproc.poll() print "Sparse1 proc return code:", tar_sparse.poll() vmproc.stdin.close() shutil.rmtree(backup_tmpdir) ''' ' Wait for backup chunk to finish ' - Monitor all the processes (streamproc, hmac, vmproc, addproc) for errors ' - Copy stdout of streamproc to backup_target and hmac stdin if available ' - Compute progress based on total_backup_sz and send progress to ' progress_callback function ' - Returns if ' - one of the monitored processes error out (streamproc, hmac, vmproc, ' addproc), along with the processe that failed ' - all of the monitored processes except vmproc finished successfully ' (vmproc termination is controlled by the python script) ' - streamproc does not delivers any data anymore (return with the error ' "") ''' def wait_backup_feedback(progress_callback, in_stream, streamproc, backup_target, total_backup_sz, hmac=None, vmproc=None, addproc=None, remove_trailing_bytes=0): buffer_size = 409600 run_error = None run_count = 1 blocks_backedup = 0 while run_count > 0 and run_error == None: buffer = in_stream.read(buffer_size) progress_callback(len(buffer), total_backup_sz) run_count = 0 if hmac: retcode=hmac.poll() if retcode != None: if retcode != 0: run_error = "hmac" else: run_count += 1 if addproc: retcode=addproc.poll() if retcode != None: if retcode != 0: run_error = "addproc" else: run_count += 1 if vmproc: retcode = vmproc.poll() if retcode != None: if retcode != 0: run_error = "VM" if BACKUP_DEBUG: print vmproc.stdout.read() else: # VM should run until the end pass if streamproc: retcode=streamproc.poll() if retcode != None: if retcode != 0: run_error = "streamproc" break elif retcode == 0 and len(buffer) <= 0: return "" run_count += 1 else: if len(buffer) <= 0: return "" backup_target.write(buffer) if hmac: hmac.stdin.write(buffer) return run_error def verify_hmac(filename, hmacfile, passphrase): if BACKUP_DEBUG: print "Verifying file "+filename if hmacfile != filename + ".hmac": raise QubesException( "ERROR: expected hmac for {}, but got {}".\ format(filename, hmacfile)) hmac_proc = subprocess.Popen (["openssl", "dgst", "-hmac", passphrase], stdin=open(filename,'rb'), stdout=subprocess.PIPE, stderr=subprocess.PIPE) hmac_stdout, hmac_stderr = hmac_proc.communicate() if len(hmac_stderr) > 0: raise QubesException("ERROR: verify file {0}: {1}".format((filename, hmac_stderr))) else: if BACKUP_DEBUG: print "Loading hmac for file " + filename hmac = load_hmac(open(hmacfile,'r').read()) if len(hmac) > 0 and load_hmac(hmac_stdout) == hmac: os.unlink(hmacfile) if BACKUP_DEBUG: print "File verification OK -> Sending file " + filename return True else: raise QubesException( "ERROR: invalid hmac for file {0}: {1}. " \ "Is the passphrase correct?".\ format(filename, load_hmac(hmac_stdout))) # Not reachable return False class Extract_Worker(Process): def __init__(self, queue, base_dir, passphrase, encrypted, total_size, print_callback, error_callback, progress_callback, vmproc=None): super(Extract_Worker, self).__init__() self.queue = queue self.base_dir = base_dir self.passphrase = passphrase self.encrypted = encrypted self.total_size = total_size self.blocks_backedup = 0 self.tar2_command = None self.tar2_current_file = None self.print_callback = print_callback self.error_callback = error_callback self.progress_callback = progress_callback self.vmproc = vmproc self.restore_pipe = os.path.join(self.base_dir,"restore_pipe") if BACKUP_DEBUG: print "Creating pipe in:", self.restore_pipe os.mkfifo(self.restore_pipe) def compute_progress(self, new_size, total_size): self.blocks_backedup += new_size progress = self.blocks_backedup / float(self.total_size) progress = int(round(progress*100,2)) self.progress_callback(progress) def run(self): if BACKUP_DEBUG: self.print_callback("Started sending thread") self.print_callback("Moving to dir "+self.base_dir) os.chdir(self.base_dir) for filename in iter(self.queue.get,None): if filename == "FINISHED": break if BACKUP_DEBUG: self.print_callback("Extracting file "+filename) if filename.endswith('.000'): # next file if self.tar2_command != None: if self.tar2_command.wait() != 0: raise QubesException( "ERROR: unable to extract files for {0}.".\ format(self.tar2_current_file)) else: # Finished extracting the tar file self.tar2_command = None self.tar2_current_file = None tar2_cmdline = ['tar', '-xMk%sf' % ("v" if BACKUP_DEBUG else ""), self.restore_pipe, os.path.relpath(filename.rstrip('.000'))] if BACKUP_DEBUG: self.print_callback("Running command "+str(tar2_cmdline)) self.tar2_command = subprocess.Popen(tar2_cmdline, stdin=subprocess.PIPE, stderr=(None if BACKUP_DEBUG else open('/dev/null', 'w'))) else: if BACKUP_DEBUG: self.print_callback("Releasing next chunck") self.tar2_command.stdin.write("\n") self.tar2_command.stdin.flush() self.tar2_current_file = filename pipe = open(self.restore_pipe,'wb') common_args = { 'backup_target': pipe, 'total_backup_sz': self.total_size, 'hmac': None, 'vmproc': self.vmproc, 'addproc': self.tar2_command } if self.encrypted: # Start decrypt encryptor = subprocess.Popen (["openssl", "enc", "-d", "-aes-256-cbc", "-pass", "pass:"+passphrase], stdin=open(filename,'rb'), stdout=subprocess.PIPE) run_error = wait_backup_feedback( progress_callback=self.compute_progress, in_stream=encryptor.stdout, streamproc=encryptor, **common_args) else: run_error = wait_backup_feedback( progress_callback=self.compute_progress, in_stream=open(filename,"rb"), streamproc=None, **common_args) pipe.close() # Delete the file as we don't need it anymore if BACKUP_DEBUG: self.print_callback("Removing file "+filename) os.remove(filename) if self.tar2_command != None: if self.tar2_command.wait() != 0: raise QubesException( "ERROR: unable to extract files for {0}.".\ format(self.tar2_current_file)) else: # Finished extracting the tar file self.tar2_command = None os.unlink(self.restore_pipe) if BACKUP_DEBUG: self.print_callback("Finished extracting thread") def restore_vm_dirs (backup_source, restore_tmpdir, passphrase, vms_dirs, vms, vms_size, print_callback=None, error_callback=None, progress_callback=None, encrypted=False, appvm=None): # Setup worker to extract encrypted data chunks to the restore dirs if progress_callback == None: def progress_callback(data): pass to_extract = Queue() extract_proc = Extract_Worker(queue=to_extract, base_dir=restore_tmpdir, passphrase=passphrase, encrypted=encrypted, total_size=vms_size, print_callback=print_callback, error_callback=error_callback, progress_callback=progress_callback) extract_proc.start() if BACKUP_DEBUG: print_callback("Working in temporary dir:"+restore_tmpdir) print_callback(str(vms_size)+" bytes to restore") vmproc = None if appvm != None: # Prepare the backup target (Qubes service call) backup_target = "QUBESRPC qubes.Restore dom0" # If APPVM, STDOUT is a PIPE vmproc = appvm.run(command = backup_target, passio_popen = True) vmproc.stdin.write(backup_source.replace("\r","").replace("\n","")+"\n") # Send to tar2qfile the VMs that should be extracted vmproc.stdin.write(" ".join(vms_dirs)+"\n") backup_stdin = vmproc.stdout tar1_command = ['/usr/libexec/qubes/qfile-dom0-unpacker', str(os.getuid()), restore_tmpdir, '-v'] else: backup_stdin = open(backup_source,'rb') tar1_command = ['tar', '-ix%sf' % ("v" if BACKUP_DEBUG else ""), backup_source, '-C', restore_tmpdir] + vms_dirs tar1_env = os.environ.copy() # TODO: add some safety margin? tar1_env['UPDATES_MAX_BYTES'] = str(vms_size) # Restoring only header if vms_dirs and vms_dirs[0] == 'qubes.xml.000': tar1_env['UPDATES_MAX_FILES'] = '2' else: tar1_env['UPDATES_MAX_FILES'] = '0' if BACKUP_DEBUG: print_callback("Run command"+str(tar1_command)) command = subprocess.Popen(tar1_command, stdin=backup_stdin, stdout=vmproc.stdin if vmproc else subprocess.PIPE, stderr=subprocess.PIPE, env=tar1_env) # qfile-dom0-unpacker output filelist on stderr (and have stdout connected # to the VM), while tar output filelist on stdout if appvm: filelist_pipe = command.stderr else: filelist_pipe = command.stdout while True: filename = filelist_pipe.readline().strip(" \t\r\n") if BACKUP_DEBUG: print_callback("Getting new file:"+filename) if not filename or filename=="EOF": break hmacfile = filelist_pipe.readline().strip(" \t\r\n") if BACKUP_DEBUG: print_callback("Getting hmac:"+hmacfile) if not any(map(lambda x: filename.startswith(x), vms_dirs)): if BACKUP_DEBUG: print_callback("Ignoring VM not selected for restore") os.unlink(os.path.join(restore_tmpdir, filename)) os.unlink(os.path.join(restore_tmpdir, hmacfile)) continue if verify_hmac(os.path.join(restore_tmpdir,filename), os.path.join(restore_tmpdir,hmacfile), passphrase): to_extract.put(os.path.join(restore_tmpdir, filename)) if command.wait() != 0: raise QubesException( "ERROR: unable to read the qubes backup file {0} ({1}). " \ "Is it really a backup?".format(backup_source, command.wait())) if vmproc: if vmproc.wait() != 0: raise QubesException( "ERROR: unable to read the qubes backup {0} " \ "because of a VM error: {1}".format( backup_source, vmproc.stderr.read())) if BACKUP_DEBUG: print "Extraction process status:", extract_proc.exitcode to_extract.put("FINISHED") if BACKUP_DEBUG: print_callback("Waiting for the extraction process to finish...") extract_proc.join() if BACKUP_DEBUG: print_callback("Extraction process finished with code:" + \ str(extract_proc.exitcode)) if extract_proc.exitcode != 0: raise QubesException( "ERROR: unable to extract the qubes backup. " \ "Check extracting process errors.") def backup_restore_set_defaults(options): if 'use-default-netvm' not in options: options['use-default-netvm'] = False if 'use-none-netvm' not in options: options['use-none-netvm'] = False if 'use-default-template' not in options: options['use-default-template'] = False if 'dom0-home' not in options: options['dom0-home'] = True if 'replace-template' not in options: options['replace-template'] = [] return options def load_hmac(hmac): hmac = hmac.strip(" \t\r\n").split("=") if len(hmac) > 1: hmac = hmac[1].strip() else: raise QubesException("ERROR: invalid hmac file content") return hmac def backup_restore_header(source, passphrase, print_callback = print_stdout, error_callback = print_stderr, encrypted=False, appvm=None): # Simulate dd if=backup_file count=10 | file - # Simulate dd if=backup_file count=10 | gpg2 -d | tar xzv -O # analysis = subprocess.Popen() vmproc = None import tempfile feedback_file = tempfile.NamedTemporaryFile() restore_tmpdir = tempfile.mkdtemp(prefix="/var/tmp/restore_") os.chdir(restore_tmpdir) if BACKUP_DEBUG: print "Working in", restore_tmpdir # tar2qfile matches only beginnings, while tar full path if appvm: extract_filter = ['qubes.xml.000'] else: extract_filter = ['qubes.xml.000', 'qubes.xml.000.hmac'] restore_vm_dirs (source, restore_tmpdir, passphrase=passphrase, vms_dirs=extract_filter, vms=None, vms_size=40000, print_callback=print_callback, error_callback=error_callback, progress_callback=None, encrypted=encrypted, appvm=appvm) return (restore_tmpdir, "qubes.xml") def backup_restore_prepare(backup_dir, qubes_xml, passphrase, options = {}, host_collection = None, encrypt=False, appvm=None): # Defaults backup_restore_set_defaults(options) #### Private functions begin def is_vm_included_in_backup (backup_dir, vm): if vm.backup_content: return True else: return False def find_template_name(template, replaces): rx_replace = re.compile("(.*):(.*)") for r in replaces: m = rx_replace.match(r) if m.group(1) == template: return m.group(2) return template #### Private functions end if BACKUP_DEBUG: print "Loading file", qubes_xml backup_collection = QubesVmCollection(store_filename = qubes_xml) backup_collection.lock_db_for_reading() backup_collection.load() if host_collection is None: host_collection = QubesVmCollection() host_collection.lock_db_for_reading() host_collection.load() host_collection.unlock_db() backup_vms_list = [vm for vm in backup_collection.values()] host_vms_list = [vm for vm in host_collection.values()] vms_to_restore = {} there_are_conflicting_vms = False there_are_missing_templates = False there_are_missing_netvms = False dom0_username_mismatch = False restore_home = False # ... and the actual data for vm in backup_vms_list: if vm.qid == 0: # Handle dom0 as special case later continue if is_vm_included_in_backup (backup_dir, vm): if BACKUP_DEBUG: print vm.name,"is included in backup" vms_to_restore[vm.name] = {} vms_to_restore[vm.name]['vm'] = vm; if 'exclude' in options.keys(): vms_to_restore[vm.name]['excluded'] = vm.name in options['exclude'] if vms_to_restore[vm.name]['excluded']: vms_to_restore[vm.name]['good-to-go'] = False if host_collection.get_vm_by_name (vm.name) is not None: vms_to_restore[vm.name]['already-exists'] = True vms_to_restore[vm.name]['good-to-go'] = False if vm.template is None: vms_to_restore[vm.name]['template'] = None else: templatevm_name = find_template_name(vm.template.name, options['replace-template']) vms_to_restore[vm.name]['template'] = templatevm_name template_vm_on_host = host_collection.get_vm_by_name (templatevm_name) # No template on the host? if not ((template_vm_on_host is not None) and template_vm_on_host.is_template()): # Maybe the (custom) template is in the backup? template_vm_on_backup = backup_collection.get_vm_by_name (templatevm_name) if template_vm_on_backup is None or not \ (is_vm_included_in_backup(backup_dir, template_vm_on_backup) and \ template_vm_on_backup.is_template()): if options['use-default-template']: vms_to_restore[vm.name]['orig-template'] = templatevm_name vms_to_restore[vm.name]['template'] = host_collection.get_default_template().name else: vms_to_restore[vm.name]['missing-template'] = True vms_to_restore[vm.name]['good-to-go'] = False if vm.netvm is None: vms_to_restore[vm.name]['netvm'] = None else: netvm_name = vm.netvm.name vms_to_restore[vm.name]['netvm'] = netvm_name # Set to None to not confuse QubesVm object from backup # collection with host collection (further in clone_attrs). Set # directly _netvm to suppress setter action, especially # modifying firewall vm._netvm = None netvm_on_host = host_collection.get_vm_by_name (netvm_name) # No netvm on the host? if not ((netvm_on_host is not None) and netvm_on_host.is_netvm()): # Maybe the (custom) netvm is in the backup? netvm_on_backup = backup_collection.get_vm_by_name (netvm_name) if not ((netvm_on_backup is not None) and \ netvm_on_backup.is_netvm() and \ is_vm_included_in_backup(backup_dir, netvm_on_backup)): if options['use-default-netvm']: vms_to_restore[vm.name]['netvm'] = host_collection.get_default_netvm().name vm.uses_default_netvm = True elif options['use-none-netvm']: vms_to_restore[vm.name]['netvm'] = None else: vms_to_restore[vm.name]['missing-netvm'] = True vms_to_restore[vm.name]['good-to-go'] = False if 'good-to-go' not in vms_to_restore[vm.name].keys(): vms_to_restore[vm.name]['good-to-go'] = True # ...and dom0 home if options['dom0-home'] and \ is_vm_included_in_backup(backup_dir, backup_collection[0]): vm = backup_collection[0] vms_to_restore['dom0'] = {} vms_to_restore['dom0']['subdir'] = vm.backup_path vms_to_restore['dom0']['size'] = vm.backup_size local_user = grp.getgrnam('qubes').gr_mem[0] dom0_home = vm.backup_path vms_to_restore['dom0']['username'] = os.path.basename(dom0_home) if vms_to_restore['dom0']['username'] != local_user: vms_to_restore['dom0']['username-mismatch'] = True if not options['ignore-dom0-username-mismatch']: vms_to_restore['dom0']['good-to-go'] = False if 'good-to-go' not in vms_to_restore['dom0']: vms_to_restore['dom0']['good-to-go'] = True # Not needed - all the data stored in vms_to_restore os.unlink(qubes_xml) return vms_to_restore def backup_restore_print_summary(restore_info, print_callback = print_stdout): fields = { "qid": {"func": "vm.qid"}, "name": {"func": "('[' if vm.is_template() else '')\ + ('{' if vm.is_netvm() else '')\ + vm.name \ + (']' if vm.is_template() else '')\ + ('}' if vm.is_netvm() else '')"}, "type": {"func": "'Tpl' if vm.is_template() else \ 'HVM' if vm.type == 'HVM' else \ vm.type.replace('VM','')"}, "updbl" : {"func": "'Yes' if vm.updateable else ''"}, "template": {"func": "'n/a' if vm.is_template() or vm.template is None else\ vm_info['template']"}, "netvm": {"func": "'n/a' if vm.is_netvm() and not vm.is_proxyvm() else\ ('*' if vm.uses_default_netvm else '') +\ vm_info['netvm'] if vm_info['netvm'] is not None else '-'"}, "label" : {"func" : "vm.label.name"}, } fields_to_display = ["name", "type", "template", "updbl", "netvm", "label" ] # First calculate the maximum width of each field we want to display total_width = 0; for f in fields_to_display: fields[f]["max_width"] = len(f) for vm_info in restore_info.values(): if 'vm' in vm_info.keys(): vm = vm_info['vm'] l = len(str(eval(fields[f]["func"]))) if l > fields[f]["max_width"]: fields[f]["max_width"] = l total_width += fields[f]["max_width"] print_callback("") print_callback("The following VMs are included in the backup:") print_callback("") # Display the header s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(fields[f]["max_width"] + 1) s += fmt.format('-') print_callback(s) s = "" for f in fields_to_display: fmt="{{0:>{0}}} |".format(fields[f]["max_width"] + 1) s += fmt.format(f) print_callback(s) s = "" for f in fields_to_display: fmt="{{0:-^{0}}}-+".format(fields[f]["max_width"] + 1) s += fmt.format('-') print_callback(s) for vm_info in restore_info.values(): # Skip non-VM here if not 'vm' in vm_info: continue vm = vm_info['vm'] s = "" for f in fields_to_display: fmt="{{0:>{0}}} |".format(fields[f]["max_width"] + 1) s += fmt.format(eval(fields[f]["func"])) if 'excluded' in vm_info and vm_info['excluded']: s += " <-- Excluded from restore" elif 'already-exists' in vm_info: s += " <-- A VM with the same name already exists on the host!" elif 'missing-template' in vm_info: s += " <-- No matching template on the host or in the backup found!" elif 'missing-netvm' in vm_info: s += " <-- No matching netvm on the host or in the backup found!" elif 'orig-template' in vm_info: s += " <-- Original template was '%s'" % (vm_info['orig-template']) print_callback(s) if 'dom0' in restore_info.keys(): s = "" for f in fields_to_display: fmt="{{0:>{0}}} |".format(fields[f]["max_width"] + 1) if f == "name": s += fmt.format("Dom0") elif f == "type": s += fmt.format("Home") else: s += fmt.format("") if 'username-mismatch' in restore_info['dom0']: s += " <-- username in backup and dom0 mismatch" print_callback(s) def backup_restore_do(backup_dir, restore_tmpdir, passphrase, restore_info, host_collection = None, print_callback = print_stdout, error_callback = print_stderr, progress_callback = None, encrypted=False, appvm=None): lock_obtained = False if host_collection is None: host_collection = QubesVmCollection() host_collection.lock_db_for_writing() host_collection.load() lock_obtained = True # Perform VM restoration in backup order vms_dirs = [] vms_size = 0 vms = {} for vm_info in restore_info.values(): if not vm_info['good-to-go']: continue if 'vm' not in vm_info: continue vm = vm_info['vm'] vms_size += vm.backup_size vms_dirs.append(vm.backup_path) vms[vm.name] = vm if 'dom0' in restore_info.keys() and restore_info['dom0']['good-to-go']: vms_dirs.append('dom0-home') vms_size += restore_info['dom0']['size'] restore_vm_dirs (backup_dir, restore_tmpdir, passphrase=passphrase, vms_dirs=vms_dirs, vms=vms, vms_size=vms_size, print_callback=print_callback, error_callback=error_callback, progress_callback=progress_callback, encrypted=encrypted, appvm=appvm) # Add VM in right order for (vm_class_name, vm_class) in sorted(QubesVmClasses.items(), key=lambda _x: _x[1].load_order): for vm_info in restore_info.values(): if not vm_info['good-to-go']: continue if 'vm' not in vm_info: continue vm = vm_info['vm'] if not vm.__class__ == vm_class: continue print_callback("-> Restoring {type} {0}...".format(vm.name, type=vm_class_name)) retcode = subprocess.call (["mkdir", "-p", os.path.dirname(vm.dir_path)]) if retcode != 0: error_callback("*** Cannot create directory: {0}?!".format(dest_dir)) error_callback("Skipping...") continue template = None if vm.template is not None: template_name = vm_info['template'] template = host_collection.get_vm_by_name(template_name) new_vm = None try: new_vm = host_collection.add_new_vm(vm_class_name, name=vm.name, conf_file=vm.conf_file, dir_path=vm.dir_path, template=template, installed_by_rpm=False) shutil.move(os.path.join(restore_tmpdir, vm.backup_path), new_vm.dir_path) new_vm.verify_files() except Exception as err: error_callback("ERROR: {0}".format(err)) error_callback("*** Skipping VM: {0}".format(vm.name)) if new_vm: host_collection.pop(new_vm.qid) continue try: new_vm.clone_attrs(vm) except Exception as err: error_callback("ERROR: {0}".format(err)) error_callback("*** Some VM property will not be restored") try: new_vm.appmenus_create(verbose=True) except Exception as err: error_callback("ERROR during appmenu restore: {0}".format(err)) error_callback("*** VM '{0}' will not have appmenus".format(vm.name)) # Set network dependencies - only non-default netvm setting for vm_info in restore_info.values(): if not vm_info['good-to-go']: continue if 'vm' not in vm_info: continue vm = vm_info['vm'] host_vm = host_collection.get_vm_by_name(vm.name) if host_vm is None: # Failed/skipped VM continue if not vm.uses_default_netvm: host_vm.netvm = host_collection.get_vm_by_name (vm_info['netvm']) if vm_info['netvm'] is not None else None host_collection.save() if lock_obtained: host_collection.unlock_db() # ... and dom0 home as last step if 'dom0' in restore_info.keys() and restore_info['dom0']['good-to-go']: backup_path = restore_info['dom0']['subdir'] local_user = grp.getgrnam('qubes').gr_mem[0] home_dir = pwd.getpwnam(local_user).pw_dir backup_dom0_home_dir = os.path.join(restore_tmpdir, backup_path) restore_home_backupdir = "home-pre-restore-{0}".format (time.strftime("%Y-%m-%d-%H%M%S")) print_callback("-> Restoring home of user '{0}'...".format(local_user)) print_callback("--> Existing files/dirs backed up in '{0}' dir".format(restore_home_backupdir)) os.mkdir(home_dir + '/' + restore_home_backupdir) for f in os.listdir(backup_dom0_home_dir): home_file = home_dir + '/' + f if os.path.exists(home_file): os.rename(home_file, home_dir + '/' + restore_home_backupdir + '/' + f) shutil.move(backup_dom0_home_dir + '/' + f, home_file) retcode = subprocess.call(['sudo', 'chown', '-R', local_user, home_dir]) if retcode != 0: error_callback("*** Error while setting home directory owner") shutil.rmtree(restore_tmpdir) # vim:sw=4:et: