1#!/usr/bin/env bash 2# SPDX-License-Identifier: GPL-2.0 3 4# This test creates two netdevsim virtual interfaces, assigns one of them (the 5# "destination interface") to a new namespace, and assigns IP addresses to both 6# interfaces. 7# 8# It listens on the destination interface using socat and configures a dynamic 9# target on netconsole, pointing to the destination IP address. 10# 11# Finally, it checks whether the message was received properly on the 12# destination interface. Note that this test may pollute the kernel log buffer 13# (dmesg) and relies on dynamic configuration and namespaces being configured. 14# 15# Author: Breno Leitao <leitao@debian.org> 16 17set -euo pipefail 18 19SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") 20 21source "${SCRIPTDIR}"/lib/sh/lib_netcons.sh 22 23modprobe netdevsim 2> /dev/null || true 24modprobe netconsole 2> /dev/null || true 25 26# The content of kmsg will be save to the following file 27OUTPUT_FILE="/tmp/${TARGET}" 28 29# Check for basic system dependency and exit if not found 30check_for_dependencies 31# Remove the namespace, interfaces and netconsole target on exit 32trap cleanup EXIT 33 34# Run the test twice, with different format modes 35for FORMAT in "basic" "extended" 36do 37 for IP_VERSION in "ipv6" "ipv4" 38 do 39 echo "Running with target mode: ${FORMAT} (${IP_VERSION})" 40 # Set current loglevel to KERN_INFO(6), and default to 41 # KERN_NOTICE(5) 42 echo "6 5" > /proc/sys/kernel/printk 43 # Create one namespace and two interfaces 44 set_network "${IP_VERSION}" 45 # Create a dynamic target for netconsole 46 create_dynamic_target "${FORMAT}" 47 # Only set userdata for extended format 48 if [ "$FORMAT" == "extended" ] 49 then 50 # Set userdata "key" with the "value" value 51 set_user_data 52 fi 53 # Listed for netconsole port inside the namespace and 54 # destination interface 55 listen_port_and_save_to "${OUTPUT_FILE}" "${IP_VERSION}" & 56 # Wait for socat to start and listen to the port. 57 wait_for_port "${NAMESPACE}" "${PORT}" "${IP_VERSION}" 58 # Send the message 59 echo "${MSG}: ${TARGET}" > /dev/kmsg 60 # Wait until socat saves the file to disk 61 busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" 62 63 # Make sure the message was received in the dst part 64 # and exit 65 validate_result "${OUTPUT_FILE}" "${FORMAT}" 66 # kill socat in case it is still running 67 pkill_socat 68 cleanup 69 echo "${FORMAT} : ${IP_VERSION} : Test passed" >&2 70 done 71done 72 73trap - EXIT 74exit "${ksft_pass}" 75