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#!/usr/bin/env vpython
# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""A script to recover devices in a known bad state."""
import argparse
import glob
import logging
import os
import signal
import sys
import psutil
if __name__ == '__main__':
sys.path.append(
os.path.abspath(os.path.join(os.path.dirname(__file__),
'..', '..', '..')))
from devil.android import device_blacklist
from devil.android import device_errors
from devil.android import device_utils
from devil.android.sdk import adb_wrapper
from devil.android.tools import device_status
from devil.android.tools import script_common
from devil.utils import logging_common
from devil.utils import lsusb
# TODO(jbudorick): Resolve this after experimenting w/ disabling the USB reset.
from devil.utils import reset_usb # pylint: disable=unused-import
logger = logging.getLogger(__name__)
from py_utils import modules_util
# Script depends on features from psutil version 2.0 or higher.
modules_util.RequireVersion(psutil, '2.0')
def KillAllAdb():
def get_all_adb():
for p in psutil.process_iter():
try:
# Retrieve all required process infos at once.
pinfo = p.as_dict(attrs=['pid', 'name', 'cmdline'])
if pinfo['name'] == 'adb':
pinfo['cmdline'] = ' '.join(pinfo['cmdline'])
yield p, pinfo
except (psutil.NoSuchProcess, psutil.AccessDenied):
pass
for sig in [signal.SIGTERM, signal.SIGQUIT, signal.SIGKILL]:
for p, pinfo in get_all_adb():
try:
pinfo['signal'] = sig
logger.info('kill %(signal)s %(pid)s (%(name)s [%(cmdline)s])', pinfo)
p.send_signal(sig)
except (psutil.NoSuchProcess, psutil.AccessDenied):
pass
for _, pinfo in get_all_adb():
try:
logger.error('Unable to kill %(pid)s (%(name)s [%(cmdline)s])', pinfo)
except (psutil.NoSuchProcess, psutil.AccessDenied):
pass
def TryAuth(device):
"""Uses anything in ~/.android/ that looks like a key to auth with the device.
Args:
device: The DeviceUtils device to attempt to auth.
Returns:
True if device successfully authed.
"""
possible_keys = glob.glob(os.path.join(adb_wrapper.ADB_HOST_KEYS_DIR, '*key'))
if len(possible_keys) <= 1:
logger.warning(
'Only %d ADB keys available. Not forcing auth.', len(possible_keys))
return False
KillAllAdb()
adb_wrapper.AdbWrapper.StartServer(keys=possible_keys)
new_state = device.adb.GetState()
if new_state != 'device':
logger.error(
'Auth failed. Device %s still stuck in %s.', str(device), new_state)
return False
# It worked! Now register the host's default ADB key on the device so we don't
# have to do all that again.
pub_key = os.path.join(adb_wrapper.ADB_HOST_KEYS_DIR, 'adbkey.pub')
if not os.path.exists(pub_key): # This really shouldn't happen.
logger.error('Default ADB key not available at %s.', pub_key)
return False
with open(pub_key) as f:
pub_key_contents = f.read()
try:
device.WriteFile(adb_wrapper.ADB_KEYS_FILE, pub_key_contents, as_root=True)
except (device_errors.CommandTimeoutError,
device_errors.CommandFailedError,
device_errors.DeviceUnreachableError):
logger.exception('Unable to write default ADB key to %s.', str(device))
return False
return True
def RecoverDevice(device, blacklist, should_reboot=lambda device: True):
if device_status.IsBlacklisted(device.adb.GetDeviceSerial(),
blacklist):
logger.debug('%s is blacklisted, skipping recovery.', str(device))
return
if device.adb.GetState() == 'unauthorized' and TryAuth(device):
logger.info('Successfully authed device %s!', str(device))
return
if should_reboot(device):
try:
device.WaitUntilFullyBooted(retries=0)
except (device_errors.CommandTimeoutError,
device_errors.CommandFailedError,
device_errors.DeviceUnreachableError):
logger.exception('Failure while waiting for %s. '
'Attempting to recover.', str(device))
try:
try:
device.Reboot(block=False, timeout=5, retries=0)
except device_errors.CommandTimeoutError:
logger.warning('Timed out while attempting to reboot %s normally.'
'Attempting alternative reboot.', str(device))
# The device drops offline before we can grab the exit code, so
# we don't check for status.
try:
device.adb.Root()
finally:
# We are already in a failure mode, attempt to reboot regardless of
# what device.adb.Root() returns. If the sysrq reboot fails an
# exception willbe thrown at that level.
device.adb.Shell('echo b > /proc/sysrq-trigger', expect_status=None,
timeout=5, retries=0)
except (device_errors.CommandFailedError,
device_errors.DeviceUnreachableError):
logger.exception('Failed to reboot %s.', str(device))
if blacklist:
blacklist.Extend([device.adb.GetDeviceSerial()],
reason='reboot_failure')
except device_errors.CommandTimeoutError:
logger.exception('Timed out while rebooting %s.', str(device))
if blacklist:
blacklist.Extend([device.adb.GetDeviceSerial()],
reason='reboot_timeout')
try:
device.WaitUntilFullyBooted(
retries=0, timeout=device.REBOOT_DEFAULT_TIMEOUT)
except (device_errors.CommandFailedError,
device_errors.DeviceUnreachableError):
logger.exception('Failure while waiting for %s.', str(device))
if blacklist:
blacklist.Extend([device.adb.GetDeviceSerial()],
reason='reboot_failure')
except device_errors.CommandTimeoutError:
logger.exception('Timed out while waiting for %s.', str(device))
if blacklist:
blacklist.Extend([device.adb.GetDeviceSerial()],
reason='reboot_timeout')
def RecoverDevices(devices, blacklist, enable_usb_reset=False):
"""Attempts to recover any inoperable devices in the provided list.
Args:
devices: The list of devices to attempt to recover.
blacklist: The current device blacklist, which will be used then
reset.
"""
statuses = device_status.DeviceStatus(devices, blacklist)
should_restart_usb = set(
status['serial'] for status in statuses
if (not status['usb_status']
or status['adb_status'] in ('offline', 'missing')))
should_restart_adb = should_restart_usb.union(set(
status['serial'] for status in statuses
if status['adb_status'] == 'unauthorized'))
should_reboot_device = should_restart_usb.union(set(
status['serial'] for status in statuses
if status['blacklisted']))
logger.debug('Should restart USB for:')
for d in should_restart_usb:
logger.debug(' %s', d)
logger.debug('Should restart ADB for:')
for d in should_restart_adb:
logger.debug(' %s', d)
logger.debug('Should reboot:')
for d in should_reboot_device:
logger.debug(' %s', d)
if blacklist:
blacklist.Reset()
if should_restart_adb:
KillAllAdb()
adb_wrapper.AdbWrapper.StartServer()
for serial in should_restart_usb:
try:
# TODO(crbug.com/642194): Resetting may be causing more harm
# (specifically, kernel panics) than it does good.
if enable_usb_reset:
reset_usb.reset_android_usb(serial)
else:
logger.warning('USB reset disabled for %s (crbug.com/642914)',
serial)
except IOError:
logger.exception('Unable to reset USB for %s.', serial)
if blacklist:
blacklist.Extend([serial], reason='USB failure')
except device_errors.DeviceUnreachableError:
logger.exception('Unable to reset USB for %s.', serial)
if blacklist:
blacklist.Extend([serial], reason='offline')
device_utils.DeviceUtils.parallel(devices).pMap(
RecoverDevice, blacklist,
should_reboot=lambda device: device.serial in should_reboot_device)
def main():
parser = argparse.ArgumentParser()
logging_common.AddLoggingArguments(parser)
script_common.AddEnvironmentArguments(parser)
parser.add_argument('--blacklist-file', help='Device blacklist JSON file.')
parser.add_argument('--known-devices-file', action='append', default=[],
dest='known_devices_files',
help='Path to known device lists.')
parser.add_argument('--enable-usb-reset', action='store_true',
help='Reset USB if necessary.')
args = parser.parse_args()
logging_common.InitializeLogging(args)
script_common.InitializeEnvironment(args)
blacklist = (device_blacklist.Blacklist(args.blacklist_file)
if args.blacklist_file
else None)
expected_devices = device_status.GetExpectedDevices(args.known_devices_files)
usb_devices = set(lsusb.get_android_devices())
devices = [device_utils.DeviceUtils(s)
for s in expected_devices.union(usb_devices)]
RecoverDevices(devices, blacklist, enable_usb_reset=args.enable_usb_reset)
if __name__ == '__main__':
sys.exit(main())
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