97 lines
4.1 KiB
Python
97 lines
4.1 KiB
Python
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import logging
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from autotest_lib.server.cros import vboot_constants as vboot
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from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
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class firmware_RollbackKernel(FirmwareTest):
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"""
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Servo based kernel rollback test.
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This test requires a USB disk plugged-in, which contains a Chrome OS test
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image (built by "build_image --test"). In normal mode, this test rollbacks
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kernel A and results kernel B boot. It then rollbacks kernel B and
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results recovery boot. In developer mode, the firmware ignores kernel
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rollback check so it remains unchanged.
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"""
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version = 1
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NEEDS_SERVO_USB = True
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def ensure_kernel_on_non_recovery(self, part):
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"""Ensure the requested kernel part on normal/dev boot path.
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If not, it may be a test failure during step 2 or 3, try to recover to
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the requested kernel on normal/dev mode by recovering the whole OS
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and rebooting.
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@param part: The expected kernel partition number.
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"""
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if not self.check_root_part_on_non_recovery(part):
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logging.info('Recover the disk OS by running chromeos-install...')
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self.faft_client.system.run_shell_command('chromeos-install --yes')
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self.switcher.mode_aware_reboot()
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def initialize(self, host, cmdline_args, dev_mode=False):
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"""Initialize the test"""
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super(firmware_RollbackKernel, self).initialize(host, cmdline_args)
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self.backup_kernel()
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self.backup_cgpt_attributes()
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self.switcher.setup_mode('dev' if dev_mode else 'normal')
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self.setup_usbkey(usbkey=True, host=False)
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self.setup_kernel('a')
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def cleanup(self):
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"""Cleanup the test"""
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try:
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self.ensure_kernel_on_non_recovery('a')
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self.restore_cgpt_attributes()
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self.restore_kernel()
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except Exception as e:
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logging.error("Caught exception: %s", str(e))
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super(firmware_RollbackKernel, self).cleanup()
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def run_once(self, dev_mode=False):
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"""Main test logic"""
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recovery_reason = (vboot.RECOVERY_REASON['DEP_RW_NO_DISK'],
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vboot.RECOVERY_REASON['RW_NO_KERNEL'],
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vboot.RECOVERY_REASON['RW_INVALID_OS'])
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if dev_mode:
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logging.info("Rollbacks kernel A.")
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self.check_state((self.check_root_part_on_non_recovery, 'a'))
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self.faft_client.kernel.move_version_backward('a')
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self.switcher.mode_aware_reboot()
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logging.info("Still kernel A boot since dev_mode ignores "
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"kernel rollback check.")
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self.check_state((self.check_root_part_on_non_recovery, 'a'))
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self.faft_client.kernel.move_version_forward('a')
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else:
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logging.info("Rollbacks kernel A.")
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self.check_state((self.check_root_part_on_non_recovery, 'a'))
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self.faft_client.kernel.move_version_backward('a')
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self.switcher.mode_aware_reboot()
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logging.info("Expected kernel B boot and rollbacks kernel B.")
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self.check_state((self.check_root_part_on_non_recovery, 'b'))
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self.faft_client.kernel.move_version_backward('b')
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self.switcher.mode_aware_reboot(wait_for_dut_up=False)
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self.switcher.bypass_rec_mode()
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self.switcher.wait_for_client()
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logging.info("Expected recovery boot and restores the OS image.")
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self.check_state((self.checkers.crossystem_checker, {
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'mainfw_type': 'recovery',
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'recovery_reason': recovery_reason,
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}))
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self.faft_client.kernel.move_version_forward('a')
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self.faft_client.kernel.move_version_forward('b')
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self.switcher.mode_aware_reboot()
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logging.info("Expected kernel A boot and done.")
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self.check_state((self.check_root_part_on_non_recovery, 'a'))
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