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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2024 Collabora Ltd
#
# This test checks for the presence of error (or more critical) log messages
# coming from devices in the kernel log.
#
# One failed test case is reported for each device that has outputted error
# logs. Devices with no errors do not produce a passing test case to avoid
# polluting the results, therefore a successful run will list 0 tests run.
#
import glob
import os
import re
import sys
# Allow ksft module to be imported from different directory
this_dir = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(this_dir, "../../kselftest/"))
import ksft
kmsg = "/dev/kmsg"
RE_log = re.compile(
r"(?P<prefix>[0-9]+),(?P<sequence>[0-9]+),(?P<timestamp>[0-9]+),(?P<flag>[^;]*)(,[^;]*)*;(?P<message>.*)"
)
RE_tag = re.compile(r" (?P<key>[^=]+)=(?P<value>.*)")
PREFIX_ERROR = 3
logs = []
error_log_per_device = {}
def parse_kmsg():
current_log = {}
with open(kmsg) as f:
os.set_blocking(f.fileno(), False)
for line in f:
tag_line = RE_tag.match(line)
log_line = RE_log.match(line)
if log_line:
if current_log:
logs.append(current_log) # Save last log
current_log = {
"prefix": int(log_line.group("prefix")),
"sequence": int(log_line.group("sequence")),
"timestamp": int(log_line.group("timestamp")),
"flag": log_line.group("flag"),
"message": log_line.group("message"),
}
elif tag_line:
current_log[tag_line.group("key")] = tag_line.group("value")
def generate_per_device_error_log():
for log in logs:
if log.get("DEVICE") and log["prefix"] <= PREFIX_ERROR:
if not error_log_per_device.get(log["DEVICE"]):
error_log_per_device[log["DEVICE"]] = []
error_log_per_device[log["DEVICE"]].append(log)
parse_kmsg()
generate_per_device_error_log()
num_tests = len(error_log_per_device)
ksft.print_header()
ksft.set_plan(num_tests)
for device in error_log_per_device:
for log in error_log_per_device[device]:
ksft.print_msg(log["message"])
ksft.test_result_fail(device)
if num_tests == 0:
ksft.print_msg("No device error logs found")
ksft.finished()
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