Introduce a new netconsole selftest to validate that netconsole is able to resume a deactivated target when the low level interface comes back.
The test setups the network using netdevsim, creates a netconsole target and then remove/add netdevsim in order to bring the same interfaces back. Afterwards, the test validates that the target works as expected.
Signed-off-by: Andre Carvalho asantostc@gmail.com --- tools/testing/selftests/drivers/net/Makefile | 1 + .../selftests/drivers/net/lib/sh/lib_netcons.sh | 23 ++++++++ .../selftests/drivers/net/netcons_resume.sh | 68 ++++++++++++++++++++++ 3 files changed, 92 insertions(+)
diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index 984ece05f7f92e836592107ba4c692da6d8ce1b3..f47c4d57f7b4ce82b0b59bee4c87a9660819675e 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -17,6 +17,7 @@ TEST_PROGS := \ netcons_fragmented_msg.sh \ netcons_overflow.sh \ netcons_sysdata.sh \ + netcons_resume.sh \ netpoll_basic.py \ ping.py \ queues.py \ diff --git a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh index 8e1085e896472d5c87ec8b236240878a5b2d00d2..ba7c865b1be3b60f53ea548aba269059ca74aee6 100644 --- a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh +++ b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh @@ -350,6 +350,29 @@ function check_netconsole_module() { fi }
+function wait_target_state() { + local TARGET=${1} + local STATE=${2} + local FILENAME="${NETCONS_CONFIGFS}"/"${TARGET}"/"enabled" + + if [ "${STATE}" == "enabled" ] + then + ENABLED=1 + else + ENABLED=0 + fi + + if [ ! -f "$FILENAME" ]; then + echo "FAIL: Target does not exist." >&2 + exit "${ksft_fail}" + fi + + slowwait 2 sh -c 'test -n "$(grep '"'${ENABLED}'"' '"'${FILENAME}'"')"' || { + echo "FAIL: ${TARGET} is not ${STATE}." >&2 + exit "${ksft_fail}" + } +} + # A wrapper to translate protocol version to udp version function wait_for_port() { local NAMESPACE=${1} diff --git a/tools/testing/selftests/drivers/net/netcons_resume.sh b/tools/testing/selftests/drivers/net/netcons_resume.sh new file mode 100755 index 0000000000000000000000000000000000000000..7e8ea74821fffdac8be0c3db2f1aa7953b4d5bd5 --- /dev/null +++ b/tools/testing/selftests/drivers/net/netcons_resume.sh @@ -0,0 +1,68 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: GPL-2.0 + +# This test validates that netconsole is able to resume a target that was +# deactivated when its interface was removed. +# +# The test configures a netconsole dynamic target and then removes netdevsim +# module to cause the interface to disappear. The test veries that the target +# moved to disabled state before adding netdevsim and the interface back. +# +# Finally, the test verifies that the target is re-enabled automatically and +# the message is received on the destination interface. +# +# Author: Andre Carvalho asantostc@gmail.com + +set -euo pipefail + +SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") + +source "${SCRIPTDIR}"/lib/sh/lib_netcons.sh + +modprobe netdevsim 2> /dev/null || true +modprobe netconsole 2> /dev/null || true + +# The content of kmsg will be save to the following file +OUTPUT_FILE="/tmp/${TARGET}" + +# Check for basic system dependency and exit if not found +check_for_dependencies + +# 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 + +# Remove low level module +rmmod netdevsim +# Target should be disabled +wait_target_state "${TARGET}" "disabled" + +# Add back low level module +modprobe netdevsim +# Recreate namespace and two interfaces +set_network +# Target should be enabled again +wait_target_state "${TARGET}" "enabled" + +# Listed 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}" "${PORT}" udp +# Send the message +echo "${MSG}: ${TARGET}" > /dev/kmsg +# Wait until socat saves the file to disk +busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" +# Make sure the message was received in the dst part +# and exit +validate_msg "${OUTPUT_FILE}" +# kill socat in case it is still running +pkill_socat + +exit "${ksft_pass}"