| # Copyright 2015 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Install/copy the image to the device.""" |
| |
| from __future__ import print_function |
| |
| import os |
| import re |
| import shutil |
| import tempfile |
| |
| from chromite.lib import constants |
| from chromite.lib import auto_updater |
| from chromite.lib import commandline |
| from chromite.lib import cros_build_lib |
| from chromite.lib import cros_logging as logging |
| from chromite.lib import dev_server_wrapper as ds_wrapper |
| from chromite.lib import operation |
| from chromite.lib import osutils |
| from chromite.lib import path_util |
| from chromite.lib import remote_access |
| |
| |
| DEVSERVER_STATIC_DIR = path_util.FromChrootPath( |
| os.path.join(constants.CHROOT_SOURCE_ROOT, 'devserver', 'static')) |
| |
| |
| class UsbImagerOperation(operation.ProgressBarOperation): |
| """Progress bar for flashing image to operation.""" |
| |
| def __init__(self, image): |
| super(UsbImagerOperation, self).__init__() |
| self._size = os.path.getsize(image) |
| self._transferred = 0. |
| self._bytes = re.compile(r'(\d+) bytes') |
| |
| def _GetDDPid(self): |
| """Get the Pid of dd.""" |
| try: |
| pids = cros_build_lib.RunCommand(['pgrep', 'dd'], capture_output=True, |
| print_cmd=False).output |
| for pid in pids.splitlines(): |
| if osutils.IsChildProcess(int(pid), name='dd'): |
| return int(pid) |
| return -1 |
| except cros_build_lib.RunCommandError: |
| # If dd isn't still running, then we assume that it is finished. |
| return -1 |
| |
| def _PingDD(self, dd_pid): |
| """Send USR1 signal to dd to get status update.""" |
| try: |
| cmd = ['kill', '-USR1', str(dd_pid)] |
| cros_build_lib.SudoRunCommand(cmd, print_cmd=False) |
| except cros_build_lib.RunCommandError: |
| # Here we assume that dd finished in the background. |
| return |
| |
| def ParseOutput(self, output=None): |
| """Parse the output of dd to update progress bar.""" |
| dd_pid = self._GetDDPid() |
| if dd_pid == -1: |
| return |
| |
| self._PingDD(dd_pid) |
| |
| if output is None: |
| stdout = self._stdout.read() |
| stderr = self._stderr.read() |
| output = stdout + stderr |
| |
| match = self._bytes.search(output) |
| if match: |
| self._transferred = match.groups()[0] |
| |
| self.ProgressBar(float(self._transferred) / self._size) |
| |
| |
| def _IsFilePathGPTDiskImage(file_path, require_pmbr=False): |
| """Determines if a file is a valid GPT disk. |
| |
| Args: |
| file_path: Path to the file to test. |
| require_pmbr: Whether to require a PMBR in LBA0. |
| """ |
| if os.path.isfile(file_path): |
| with open(file_path) as image_file: |
| if require_pmbr: |
| # Seek to the end of LBA0 and look for the PMBR boot signature. |
| image_file.seek(0x1fe) |
| if image_file.read(2) != '\x55\xaa': |
| return False |
| # Current file position is start of LBA1 now. |
| else: |
| # Seek to LBA1 where the GPT starts. |
| image_file.seek(0x200) |
| |
| # See if there's a GPT here. |
| if image_file.read(8) == 'EFI PART': |
| return True |
| |
| return False |
| |
| |
| def _ChooseImageFromDirectory(dir_path): |
| """Lists all image files in |dir_path| and ask user to select one. |
| |
| Args: |
| dir_path: Path to the directory. |
| """ |
| images = sorted([x for x in os.listdir(dir_path) if |
| _IsFilePathGPTDiskImage(os.path.join(dir_path, x))]) |
| idx = 0 |
| if len(images) == 0: |
| raise ValueError('No image found in %s.' % dir_path) |
| elif len(images) > 1: |
| idx = cros_build_lib.GetChoice( |
| 'Multiple images found in %s. Please select one to continue:' % ( |
| (dir_path,)), |
| images) |
| |
| return os.path.join(dir_path, images[idx]) |
| |
| |
| class FlashError(Exception): |
| """Thrown when there is an unrecoverable error during flash.""" |
| |
| |
| class USBImager(object): |
| """Copy image to the target removable device.""" |
| |
| def __init__(self, device, board, image, debug=False, install=False, |
| yes=False): |
| """Initalizes USBImager.""" |
| self.device = device |
| self.board = board if board else cros_build_lib.GetDefaultBoard() |
| self.image = image |
| self.debug = debug |
| self.debug_level = logging.DEBUG if debug else logging.INFO |
| self.install = install |
| self.yes = yes |
| |
| def DeviceNameToPath(self, device_name): |
| return '/dev/%s' % device_name |
| |
| def GetRemovableDeviceDescription(self, device): |
| """Returns a informational description of the removable |device|. |
| |
| Args: |
| device: the device name (e.g. sdc). |
| |
| Returns: |
| A string describing |device| (e.g. Patriot Memory 7918 MB). |
| """ |
| desc = [ |
| osutils.GetDeviceInfo(device, keyword='manufacturer'), |
| osutils.GetDeviceInfo(device, keyword='product'), |
| osutils.GetDeviceSize(self.DeviceNameToPath(device)), |
| '(%s)' % self.DeviceNameToPath(device), |
| ] |
| return ' '.join([x for x in desc if x]) |
| |
| def ListAllRemovableDevices(self): |
| """Returns a list of removable devices. |
| |
| Returns: |
| A list of device names (e.g. ['sdb', 'sdc']). |
| """ |
| devices = osutils.ListBlockDevices() |
| removable_devices = [] |
| for d in devices: |
| if d.TYPE == 'disk' and d.RM == '1': |
| removable_devices.append(d.NAME) |
| |
| return removable_devices |
| |
| def ChooseRemovableDevice(self, devices): |
| """Lists all removable devices and asks user to select/confirm. |
| |
| Args: |
| devices: a list of device names (e.g. ['sda', 'sdb']). |
| |
| Returns: |
| The device name chosen by the user. |
| """ |
| idx = cros_build_lib.GetChoice( |
| 'Removable device(s) found. Please select/confirm to continue:', |
| [self.GetRemovableDeviceDescription(x) for x in devices]) |
| |
| return devices[idx] |
| |
| def InstallImageToDevice(self, image, device): |
| """Installs |image| to the removable |device|. |
| |
| Args: |
| image: Path to the image to copy. |
| device: Device to copy to. |
| """ |
| cmd = [ |
| 'chromeos-install', |
| '--yes', |
| '--skip_src_removable', |
| '--skip_dst_removable', |
| '--payload_image=%s' % image, |
| '--dst=%s' % device, |
| '--skip_postinstall', |
| ] |
| cros_build_lib.SudoRunCommand(cmd) |
| |
| def CopyImageToDevice(self, image, device): |
| """Copies |image| to the removable |device|. |
| |
| Args: |
| image: Path to the image to copy. |
| device: Device to copy to. |
| """ |
| cmd = ['dd', 'if=%s' % image, 'of=%s' % device, 'bs=4M', 'iflag=fullblock', |
| 'oflag=sync'] |
| if logging.getLogger().getEffectiveLevel() <= logging.NOTICE: |
| op = UsbImagerOperation(image) |
| op.Run(cros_build_lib.SudoRunCommand, cmd, debug_level=logging.NOTICE, |
| update_period=0.5) |
| else: |
| cros_build_lib.SudoRunCommand( |
| cmd, debug_level=logging.NOTICE, |
| print_cmd=logging.getLogger().getEffectiveLevel() < logging.NOTICE) |
| |
| cros_build_lib.SudoRunCommand(['sync'], debug_level=self.debug_level) |
| |
| def _GetImagePath(self): |
| """Returns the image path to use.""" |
| image_path = translated_path = None |
| if os.path.isfile(self.image): |
| if not self.yes and not _IsFilePathGPTDiskImage(self.image): |
| # TODO(wnwen): Open the tarball and if there is just one file in it, |
| # use that instead. Existing code in upload_symbols.py. |
| if cros_build_lib.BooleanPrompt( |
| prolog='The given image file is not a valid disk image. Perhaps ' |
| 'you forgot to untar it.', |
| prompt='Terminate the current flash process?'): |
| raise FlashError('Update terminated by user.') |
| image_path = self.image |
| elif os.path.isdir(self.image): |
| # Ask user which image (*.bin) in the folder to use. |
| image_path = _ChooseImageFromDirectory(self.image) |
| else: |
| # Translate the xbuddy path to get the exact image to use. |
| translated_path, _ = ds_wrapper.GetImagePathWithXbuddy( |
| self.image, self.board, static_dir=DEVSERVER_STATIC_DIR) |
| image_path = ds_wrapper.TranslatedPathToLocalPath( |
| translated_path, DEVSERVER_STATIC_DIR) |
| |
| logging.info('Using image %s', translated_path or image_path) |
| return image_path |
| |
| def Run(self): |
| """Image the removable device.""" |
| devices = self.ListAllRemovableDevices() |
| |
| if self.device: |
| # If user specified a device path, check if it exists. |
| if not os.path.exists(self.device): |
| raise FlashError('Device path %s does not exist.' % self.device) |
| |
| # Then check if it is removable. |
| if self.device not in [self.DeviceNameToPath(x) for x in devices]: |
| msg = '%s is not a removable device.' % self.device |
| if not (self.yes or cros_build_lib.BooleanPrompt( |
| default=False, prolog=msg)): |
| raise FlashError('You can specify usb:// to choose from a list of ' |
| 'removable devices.') |
| target = None |
| if self.device: |
| # Get device name from path (e.g. sdc in /dev/sdc). |
| target = self.device.rsplit(os.path.sep, 1)[-1] |
| elif devices: |
| # Ask user to choose from the list. |
| target = self.ChooseRemovableDevice(devices) |
| else: |
| raise FlashError('No removable devices detected.') |
| |
| image_path = self._GetImagePath() |
| try: |
| device = self.DeviceNameToPath(target) |
| if self.install: |
| self.InstallImageToDevice(image_path, device) |
| else: |
| self.CopyImageToDevice(image_path, device) |
| except cros_build_lib.RunCommandError: |
| logging.error('Failed copying image to device %s', |
| self.DeviceNameToPath(target)) |
| |
| |
| class FileImager(USBImager): |
| """Copy image to the target path.""" |
| |
| def Run(self): |
| """Copy the image to the path specified by self.device.""" |
| if not os.path.isdir(os.path.dirname(self.device)): |
| raise FlashError('Parent of path %s is not a directory.' % self.device) |
| |
| image_path = self._GetImagePath() |
| if os.path.isdir(self.device): |
| logging.info('Copying to %s', |
| os.path.join(self.device, os.path.basename(image_path))) |
| else: |
| logging.info('Copying to %s', self.device) |
| try: |
| shutil.copy(image_path, self.device) |
| except IOError: |
| logging.error('Failed to copy image %s to %s', image_path, self.device) |
| |
| |
| class RemoteDeviceUpdater(object): |
| """Performs update on a remote device.""" |
| DEVSERVER_FILENAME = 'devserver.py' |
| STATEFUL_UPDATE_BIN = '/usr/bin/stateful_update' |
| UPDATE_ENGINE_BIN = 'update_engine_client' |
| # Root working directory on the device. This directory is in the |
| # stateful partition and thus has enough space to store the payloads. |
| DEVICE_BASE_DIR = '/mnt/stateful_partition/cros-flash' |
| UPDATE_CHECK_INTERVAL_PROGRESSBAR = 0.5 |
| UPDATE_CHECK_INTERVAL_NORMAL = 10 |
| |
| def __init__(self, ssh_hostname, ssh_port, image, stateful_update=True, |
| rootfs_update=True, clobber_stateful=False, reboot=True, |
| board=None, src_image_to_delta=None, wipe=True, debug=False, |
| yes=False, force=False, ssh_private_key=None, ping=True, |
| disable_verification=False): |
| """Initializes RemoteDeviceUpdater""" |
| if not stateful_update and not rootfs_update: |
| raise ValueError('No update operation to perform; either stateful or' |
| ' rootfs partitions must be updated.') |
| self.tempdir = tempfile.mkdtemp(prefix='cros-flash') |
| self.ssh_hostname = ssh_hostname |
| self.ssh_port = ssh_port |
| self.image = image |
| self.board = board |
| self.src_image_to_delta = src_image_to_delta |
| self.do_stateful_update = stateful_update |
| self.do_rootfs_update = rootfs_update |
| self.disable_verification = disable_verification |
| self.clobber_stateful = clobber_stateful |
| self.reboot = reboot |
| self.debug = debug |
| self.ssh_private_key = ssh_private_key |
| self.ping = ping |
| # Do not wipe if debug is set. |
| self.wipe = wipe and not debug |
| self.yes = yes |
| self.force = force |
| |
| def Cleanup(self): |
| """Cleans up the temporary directory.""" |
| if self.wipe: |
| logging.info('Cleaning up temporary working directory...') |
| osutils.RmDir(self.tempdir) |
| else: |
| logging.info('You can find the log files and/or payloads in %s', |
| self.tempdir) |
| |
| def GetPayloadDir(self, device): |
| """Get directory of payload for update. |
| |
| This method is used to obtain the directory of payload for cros-flash. The |
| given path 'self.image' is passed in when initializing RemoteDeviceUpdater. |
| |
| If self.image is a directory, we directly use the provided update payload(s) |
| in this directory. |
| |
| If self.image is an image, let devserver access it and generate payloads. |
| |
| If not in the above cases, let devserver first obtain the image path. Then |
| devserver will access the image and generate payloads. |
| |
| Args: |
| device: A ChromiumOSDevice object. |
| |
| Returns: |
| A string payload_dir, that represents the payload directory. |
| """ |
| payload_dir = self.tempdir |
| |
| if os.path.isdir(self.image): |
| # The given path is a directory. |
| payload_dir = self.image |
| logging.info('Using provided payloads in %s', payload_dir) |
| elif os.path.isfile(self.image): |
| # The given path is an image. |
| logging.info('Using image %s', self.image) |
| ds_wrapper.GetUpdatePayloadsFromLocalPath( |
| self.image, payload_dir, |
| src_image_to_delta=self.src_image_to_delta, |
| static_dir=DEVSERVER_STATIC_DIR) |
| else: |
| self.board = cros_build_lib.GetBoard(device_board=device.board, |
| override_board=self.board, |
| force=self.yes) |
| if not self.board: |
| raise FlashError('No board identified') |
| |
| if not self.force and self.board != device.board: |
| # If a board was specified, it must be compatible with the device. |
| raise FlashError('Device (%s) is incompatible with board %s' % |
| (device.board, self.board)) |
| |
| logging.info('Board is %s', self.board) |
| |
| # Translate the xbuddy path to get the exact image to use. |
| translated_path, resolved_path = ds_wrapper.GetImagePathWithXbuddy( |
| self.image, self.board, static_dir=DEVSERVER_STATIC_DIR, |
| lookup_only=True) |
| logging.info('Using image %s', translated_path) |
| # Convert the translated path to be used in the update request. |
| image_path = ds_wrapper.ConvertTranslatedPath(resolved_path, |
| translated_path) |
| |
| # Launch a local devserver to generate/serve update payloads. |
| ds_wrapper.GetUpdatePayloads( |
| image_path, payload_dir, board=self.board, |
| src_image_to_delta=self.src_image_to_delta, |
| static_dir=DEVSERVER_STATIC_DIR) |
| |
| return payload_dir |
| |
| def Run(self): |
| """Perform remote device update. |
| |
| The update process includes: |
| 1. initialize a device instance for the given remote device. |
| 2. achieve payload_dir which contains the required payloads for updating. |
| 3. initialize an auto-updater instance to do RunUpdate(). |
| 4. After auto-update, all temp files and dir will be cleaned up. |
| """ |
| try: |
| device_connected = False |
| |
| with remote_access.ChromiumOSDeviceHandler( |
| self.ssh_hostname, port=self.ssh_port, base_dir=self.DEVICE_BASE_DIR, |
| private_key=self.ssh_private_key, ping=self.ping) as device: |
| device_connected = True |
| |
| # Get payload directory |
| payload_dir = self.GetPayloadDir(device) |
| |
| # Do auto-update |
| chromeos_AU = auto_updater.ChromiumOSFlashUpdater( |
| device, payload_dir, self.tempdir, |
| do_rootfs_update=self.do_rootfs_update, |
| do_stateful_update=self.do_stateful_update, |
| reboot=self.reboot, |
| disable_verification=self.disable_verification, |
| clobber_stateful=self.clobber_stateful, |
| yes=self.yes) |
| chromeos_AU.CheckPayloads() |
| chromeos_AU.RunUpdate() |
| |
| except Exception: |
| logging.error('Device update failed.') |
| if device_connected and device.lsb_release: |
| lsb_entries = sorted(device.lsb_release.items()) |
| logging.info('Following are the LSB version details of the device:\n%s', |
| '\n'.join('%s=%s' % (k, v) for k, v in lsb_entries)) |
| raise |
| else: |
| logging.notice('Update performed successfully.') |
| finally: |
| self.Cleanup() |
| |
| def Flash(device, image, board=None, install=False, src_image_to_delta=None, |
| rootfs_update=True, stateful_update=True, clobber_stateful=False, |
| reboot=True, wipe=True, ssh_private_key=None, ping=True, |
| disable_rootfs_verification=False, clear_cache=False, yes=False, |
| force=False, debug=False): |
| """Flashes a device, USB drive, or file with an image. |
| |
| This provides functionality common to `cros flash` and `brillo flash` |
| so that they can parse the commandline separately but still use the |
| same underlying functionality. |
| |
| Args: |
| device: commandline.Device object; None to use the default device. |
| image: Path (string) to the update image. Can be a local or xbuddy path; |
| non-existant local paths are converted to xbuddy. |
| board: Board to use; None to automatically detect. |
| install: Install to USB using base disk layout; USB |device| scheme only. |
| src_image_to_delta: Local path to an image to be used as the base to |
| generate delta payloads; SSH |device| scheme only. |
| rootfs_update: Update rootfs partition; SSH |device| scheme only. |
| stateful_update: Update stateful partition; SSH |device| scheme only. |
| clobber_stateful: Clobber stateful partition; SSH |device| scheme only. |
| reboot: Reboot device after update; SSH |device| scheme only. |
| wipe: Wipe temporary working directory; SSH |device| scheme only. |
| ssh_private_key: Path to an SSH private key file; None to use test keys. |
| ping: Ping the device before attempting update; SSH |device| scheme only. |
| disable_rootfs_verification: Remove rootfs verification after update; SSH |
| |device| scheme only. |
| clear_cache: Clear the devserver static directory. |
| yes: Assume "yes" for any prompt. |
| force: Ignore sanity checks and prompts. Overrides |yes| if True. |
| debug: Print additional debugging messages. |
| |
| Raises: |
| FlashError: An unrecoverable error occured. |
| ValueError: Invalid parameter combination. |
| """ |
| if force: |
| yes = True |
| |
| if clear_cache: |
| logging.info('Clearing the cache...') |
| ds_wrapper.DevServerWrapper.WipeStaticDirectory(DEVSERVER_STATIC_DIR) |
| |
| try: |
| osutils.SafeMakedirsNonRoot(DEVSERVER_STATIC_DIR) |
| except OSError: |
| logging.error('Failed to create %s', DEVSERVER_STATIC_DIR) |
| |
| if install: |
| if not device or device.scheme != commandline.DEVICE_SCHEME_USB: |
| raise ValueError( |
| '--install can only be used when writing to a USB device') |
| if not cros_build_lib.IsInsideChroot(): |
| raise ValueError('--install can only be used inside the chroot') |
| |
| if not device or device.scheme == commandline.DEVICE_SCHEME_SSH: |
| if device: |
| hostname, port = device.hostname, device.port |
| else: |
| hostname, port = None, None |
| logging.notice('Preparing to update the remote device %s', hostname) |
| updater = RemoteDeviceUpdater( |
| hostname, |
| port, |
| image, |
| board=board, |
| src_image_to_delta=src_image_to_delta, |
| rootfs_update=rootfs_update, |
| stateful_update=stateful_update, |
| clobber_stateful=clobber_stateful, |
| reboot=reboot, |
| wipe=wipe, |
| debug=debug, |
| yes=yes, |
| force=force, |
| ssh_private_key=ssh_private_key, |
| ping=ping, |
| disable_verification=disable_rootfs_verification) |
| updater.Run() |
| elif device.scheme == commandline.DEVICE_SCHEME_USB: |
| path = osutils.ExpandPath(device.path) if device.path else '' |
| logging.info('Preparing to image the removable device %s', path) |
| imager = USBImager(path, |
| board, |
| image, |
| debug=debug, |
| install=install, |
| yes=yes) |
| imager.Run() |
| elif device.scheme == commandline.DEVICE_SCHEME_FILE: |
| logging.info('Preparing to copy image to %s', device.path) |
| imager = FileImager(device.path, |
| board, |
| image, |
| debug=debug, |
| yes=yes) |
| imager.Run() |
