#!/usr/bin/env bash# SPDX-License-Identifier: GPL-2.0 # This test creates two netdevsim virtual interfaces, assigns one of them (the# "destination interface") to a new namespace, and assigns IP addresses to both# interfaces.## It listens on the destination interface using socat and configures a dynamic# target on netconsole, pointing to the destination IP address.## Finally, it checks whether the message was received properly on the# destination interface.  Note that this test may pollute the kernel log buffer# (dmesg) and relies on dynamic configuration and namespaces being configured.## Author: Breno Leitao <leitao@debian.org> set -euo pipefail SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") source "${SCRIPTDIR}"/../lib/sh/lib_netcons.sh modprobe netdevsim 2> /dev/null || truemodprobe netconsole 2> /dev/null || true # The content of kmsg will be save to the following fileOUTPUT_FILE="/tmp/${TARGET}" # Check for basic system dependency and exit if not foundcheck_for_dependencies# Remove the namespace, interfaces and netconsole target on exittrap cleanup EXIT # Run the test twice, with different format modesfor FORMAT in "basic" "extended"do	for IP_VERSION in "ipv6" "ipv4"	do		echo "Running with target mode: ${FORMAT} (${IP_VERSION})"		# Set current loglevel to KERN_INFO(6), and default to		# KERN_NOTICE(5)		echo "6 5" > /proc/sys/kernel/printk		# Create one namespace and two interfaces		set_network "${IP_VERSION}"		# Create a dynamic target for netconsole		create_dynamic_target "${FORMAT}"		# Only set userdata for extended format		if [ "$FORMAT" == "extended" ]		then			# Set userdata "key" with the "value" value			set_user_data		fi		# Listed for netconsole port inside the namespace and		# destination interface		listen_port_and_save_to "${OUTPUT_FILE}" "${IP_VERSION}" &		# Wait for socat to start and listen to the port.		wait_for_port "${NAMESPACE}" "${PORT}" "${IP_VERSION}"		# Send the message		echo "${MSG}: ${TARGET}" > /dev/kmsg		# Wait until socat saves the file to disk		if ! busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}"		then			echo "FAIL: Timed out waiting (${BUSYWAIT_TIMEOUT} ms) for netconsole message in ${OUTPUT_FILE}" >&2			exit "${ksft_fail}"		fi 		# Make sure the message was received in the dst part		# and exit		validate_result "${OUTPUT_FILE}" "${FORMAT}"		# kill socat in case it is still running		pkill_socat		cleanup		echo "${FORMAT} : ${IP_VERSION} : Test passed" >&2	donedone trap - EXITexit "${ksft_pass}"