blob: f0ce152b8bd5b4183a04c859405f471b1bb94bd4 [file] [log] [blame] [edit]
# Copyright (c) 2012 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.
import logging
from autotest_lib.server.cros import vboot_constants as vboot
from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
class firmware_RollbackKernel(FirmwareTest):
"""
Servo based kernel rollback test.
This test requires a USB disk plugged-in, which contains a Chrome OS test
image (built by "build_image --test"). In normal mode, this test rollbacks
kernel A and results kernel B boot. It then rollbacks kernel B and
results recovery boot. In developer mode, the firmware ignores kernel
rollback check so it remains unchanged.
"""
version = 1
def ensure_kernel_on_non_recovery(self, part):
"""Ensure the requested kernel part on normal/dev boot path.
If not, it may be a test failure during step 2 or 3, try to recover to
the requested kernel on normal/dev mode by recovering the whole OS
and rebooting.
@param part: The expected kernel partition number.
"""
if not self.check_root_part_on_non_recovery(part):
logging.info('Recover the disk OS by running chromeos-install...')
self.faft_client.system.run_shell_command('chromeos-install --yes')
self.switcher.mode_aware_reboot()
def initialize(self, host, cmdline_args, dev_mode=False):
super(firmware_RollbackKernel, self).initialize(host, cmdline_args)
self.backup_kernel()
self.backup_cgpt_attributes()
self.switcher.setup_mode('dev' if dev_mode else 'normal')
self.setup_usbkey(usbkey=True, host=False)
self.setup_kernel('a')
def cleanup(self):
self.ensure_kernel_on_non_recovery('a')
self.restore_cgpt_attributes()
self.restore_kernel()
super(firmware_RollbackKernel, self).cleanup()
def run_once(self, dev_mode=False):
# Historical reason that the old models use a different value.
if self.faft_client.system.get_platform_name() in (
'Mario', 'Alex', 'ZGB'):
recovery_reason = vboot.RECOVERY_REASON['RW_NO_OS']
else:
recovery_reason = (vboot.RECOVERY_REASON['DEP_RW_NO_DISK'],
vboot.RECOVERY_REASON['RW_NO_KERNEL'])
if dev_mode:
logging.info("Rollbacks kernel A.")
self.check_state((self.check_root_part_on_non_recovery, 'a'))
self.faft_client.kernel.move_version_backward('a')
self.switcher.mode_aware_reboot()
logging.info("Still kernel A boot since dev_mode ignores "
"kernel rollback check.")
self.check_state((self.check_root_part_on_non_recovery, 'a'))
self.faft_client.kernel.move_version_forward('a')
else:
logging.info("Rollbacks kernel A.")
self.check_state((self.check_root_part_on_non_recovery, 'a'))
self.faft_client.kernel.move_version_backward('a')
self.switcher.mode_aware_reboot()
logging.info("Expected kernel B boot and rollbacks kernel B.")
self.check_state((self.check_root_part_on_non_recovery, 'b'))
self.faft_client.kernel.move_version_backward('b')
self.switcher.mode_aware_reboot()
logging.info("Expected recovery boot and restores the OS image.")
self.check_state((self.checkers.crossystem_checker, {
'mainfw_type': 'recovery',
'recovery_reason': recovery_reason,
}))
self.faft_client.kernel.move_version_forward(('a', 'b'))
self.switcher.mode_aware_reboot()
logging.info("Expected kernel A boot and done.")
self.check_state((self.check_root_part_on_non_recovery, 'a'))