| # Copyright (c) 2020 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. |
| |
| """These are convenience functions that ideally are never run, but in case of |
| problems collect additional information about some part of the system (both |
| DUT and test-driving host. |
| |
| Given this sporadic nature, this is not wrapped in a class but merely a |
| collection of functions that get the necessary inputs at the time when they're |
| called and need them. |
| |
| The functions return a (multi-line) string that can be attached to test errors |
| and similar places that end up in the logs.""" |
| |
| |
| def collect_usb_state(servo): |
| """Collect status on USB ports and attached devices, USB mass storage in |
| particular. |
| |
| _servo is a server.cros.servo object that can call into the DUT and query |
| elements. |
| |
| collects the DUT-side output of : |
| - `lsusb` and `lsusb -t` output to learn about the topology; |
| - `ls -lv /dev/sd*` to learn which storage devices are known to the OS and |
| what partition scheme is assumed by the kernel (-v to sort numerically); |
| - `fdisk -l` for the partitioning as reported in GPT/MBR |
| |
| Note that the return value begins with a newline. |
| """ |
| lines = [] |
| for cmd in [ |
| 'lsusb', |
| 'lsusb -t', |
| 'ls -lv /dev/sd*', |
| 'fdisk -l' |
| ]: |
| output = servo.system_output(cmd, ignore_status=True) |
| lines.append('') |
| lines.append('%s:' % cmd) |
| lines.extend(' %s' % line for line in output.splitlines()) |
| return '\n'.join(lines) |
| |
| # Add more collect functions here as necessary |
