| # 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')) |
