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#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-2.0
# A test that makes sure that sysdata runtime CPU data is properly set
# when a message is sent.
#
# There are 3 different tests, every time sent using a random CPU.
# - Test #1
# * Only enable cpu_nr sysdata feature.
# - Test #2
# * Keep cpu_nr sysdata feature enable and enable userdata.
# - Test #3
# * keep userdata enabled, and disable sysdata cpu_nr feature.
#
# Author: Breno Leitao <leitao@debian.org>
set -euo pipefail
SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
source "${SCRIPTDIR}"/lib/sh/lib_netcons.sh
# Enable the sysdata cpu_nr feature
function set_cpu_nr() {
if [[ ! -f "${NETCONS_PATH}/userdata/cpu_nr_enabled" ]]
then
echo "Populate CPU configfs path not available in ${NETCONS_PATH}/userdata/cpu_nr_enabled" >&2
exit "${ksft_skip}"
fi
echo 1 > "${NETCONS_PATH}/userdata/cpu_nr_enabled"
}
# Enable the taskname to be appended to sysdata
function set_taskname() {
if [[ ! -f "${NETCONS_PATH}/userdata/taskname_enabled" ]]
then
echo "Not able to enable taskname sysdata append. Configfs not available in ${NETCONS_PATH}/userdata/taskname_enabled" >&2
exit "${ksft_skip}"
fi
echo 1 > "${NETCONS_PATH}/userdata/taskname_enabled"
}
# Enable the release to be appended to sysdata
function set_release() {
if [[ ! -f "${NETCONS_PATH}/userdata/release_enabled" ]]
then
echo "Not able to enable release sysdata append. Configfs not available in ${NETCONS_PATH}/userdata/release_enabled" >&2
exit "${ksft_skip}"
fi
echo 1 > "${NETCONS_PATH}/userdata/release_enabled"
}
# Disable the sysdata cpu_nr feature
function unset_cpu_nr() {
echo 0 > "${NETCONS_PATH}/userdata/cpu_nr_enabled"
}
# Once called, taskname=<..> will not be appended anymore
function unset_taskname() {
echo 0 > "${NETCONS_PATH}/userdata/taskname_enabled"
}
function unset_release() {
echo 0 > "${NETCONS_PATH}/userdata/release_enabled"
}
# Test if MSG contains sysdata
function validate_sysdata() {
# OUTPUT_FILE will contain something like:
# 6.11.1-0_fbk0_rc13_509_g30d75cea12f7,13,1822,115075213798,-;netconsole selftest: netcons_gtJHM
# userdatakey=userdatavalue
# cpu=X
# taskname=<taskname>
# Echo is what this test uses to create the message. See runtest()
# function
SENDER="echo"
if [ ! -f "$OUTPUT_FILE" ]; then
echo "FAIL: File was not generated." >&2
exit "${ksft_fail}"
fi
if ! grep -q "${MSG}" "${OUTPUT_FILE}"; then
echo "FAIL: ${MSG} not found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
# Check if cpu=XX exists in the file and matches the one used
# in taskset(1)
if ! grep -q "cpu=${CPU}\+" "${OUTPUT_FILE}"; then
echo "FAIL: 'cpu=${CPU}' not found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
if ! grep -q "taskname=${SENDER}" "${OUTPUT_FILE}"; then
echo "FAIL: 'taskname=echo' not found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
rm "${OUTPUT_FILE}"
pkill_socat
}
function validate_release() {
RELEASE=$(uname -r)
if [ ! -f "$OUTPUT_FILE" ]; then
echo "FAIL: File was not generated." >&2
exit "${ksft_fail}"
fi
if ! grep -q "release=${RELEASE}" "${OUTPUT_FILE}"; then
echo "FAIL: 'release=${RELEASE}' not found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
}
# Test if MSG content exists in OUTPUT_FILE but no `cpu=` and `taskname=`
# strings
function validate_no_sysdata() {
if [ ! -f "$OUTPUT_FILE" ]; then
echo "FAIL: File was not generated." >&2
exit "${ksft_fail}"
fi
if ! grep -q "${MSG}" "${OUTPUT_FILE}"; then
echo "FAIL: ${MSG} not found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
if grep -q "cpu=" "${OUTPUT_FILE}"; then
echo "FAIL: 'cpu= found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
if grep -q "taskname=" "${OUTPUT_FILE}"; then
echo "FAIL: 'taskname= found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
if grep -q "release=" "${OUTPUT_FILE}"; then
echo "FAIL: 'release= found in ${OUTPUT_FILE}" >&2
cat "${OUTPUT_FILE}" >&2
exit "${ksft_fail}"
fi
rm "${OUTPUT_FILE}"
}
# Start socat, send the message and wait for the file to show up in the file
# system
function runtest {
# Listen for netconsole port inside the namespace and destination
# interface
listen_port_and_save_to "${OUTPUT_FILE}" &
# Wait for socat to start and listen to the port.
wait_local_port_listen "${NAMESPACE}" "${PORT}" udp
# Send the message
taskset -c "${CPU}" echo "${MSG}: ${TARGET}" > /dev/kmsg
# Wait until socat saves the file to disk
busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}"
}
# ========== #
# Start here #
# ========== #
modprobe netdevsim 2> /dev/null || true
modprobe netconsole 2> /dev/null || true
# Check for basic system dependency and exit if not found
check_for_dependencies
# This test also depends on taskset(1). Check for it before starting the test
check_for_taskset
# Set current loglevel to KERN_INFO(6), and default to KERN_NOTICE(5)
echo "6 5" > /proc/sys/kernel/printk
# Remove the namespace, interfaces and netconsole target on exit
trap cleanup EXIT
# Create one namespace and two interfaces
set_network
# Create a dynamic target for netconsole
create_dynamic_target
#====================================================
# TEST #1
# Send message from a random CPU
#====================================================
# Random CPU in the system
CPU=$((RANDOM % $(nproc)))
OUTPUT_FILE="/tmp/${TARGET}_1"
MSG="Test #1 from CPU${CPU}"
# Enable the auto population of cpu_nr
set_cpu_nr
# Enable taskname to be appended to sysdata
set_taskname
set_release
runtest
# Make sure the message was received in the dst part
# and exit
validate_release
validate_sysdata
#====================================================
# TEST #2
# This test now adds userdata together with sysdata
# ===================================================
# Get a new random CPU
CPU=$((RANDOM % $(nproc)))
OUTPUT_FILE="/tmp/${TARGET}_2"
MSG="Test #2 from CPU${CPU}"
set_user_data
runtest
validate_release
validate_sysdata
# ===================================================
# TEST #3
# Unset all sysdata, fail if any userdata is set
# ===================================================
CPU=$((RANDOM % $(nproc)))
OUTPUT_FILE="/tmp/${TARGET}_3"
MSG="Test #3 from CPU${CPU}"
unset_cpu_nr
unset_taskname
unset_release
runtest
# At this time, cpu= shouldn't be present in the msg
validate_no_sysdata
exit "${ksft_pass}"
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