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In these netconsole tests, bash is used with errexit (set -e). It means that if the busywait timeout, the tests finish without printing an error message. It is fine to ignore these errors, because the following validate_xxx helpers will check the content of the output file, and exit with an appropriated error message, e.g. FAIL: File was not generated. Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Reviewed-by: Breno Leitao <leitao@debian.org> Link: https://patch.msgid.link/20260710-net-sft-fix-containers-v1-7-a2915c294ef5@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
126 lines
3.7 KiB
Bash
Executable File
126 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: GPL-2.0
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# This test validates that netconsole is able to resume a target that was
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# deactivated when its interface was removed when the interface is brought
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# back up.
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#
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# The test configures a netconsole target and then removes netdevsim module to
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# cause the interface to disappear. Targets are configured via cmdline to ensure
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# targets bound by interface name and mac address can be resumed.
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# The test verifies that the target moved to disabled state before adding
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# netdevsim and the interface back.
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#
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# Finally, the test verifies that the target is re-enabled automatically and
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# the message is received on the destination interface.
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#
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# Author: Andre Carvalho <asantostc@gmail.com>
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set -euo pipefail
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SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
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source "${SCRIPTDIR}"/../lib/sh/lib_netcons.sh
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SAVED_SRCMAC="" # to be populated later
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SAVED_DSTMAC="" # to be populated later
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modprobe netdevsim 2> /dev/null || true
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rmmod netconsole 2> /dev/null || true
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check_netconsole_module
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function cleanup() {
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cleanup_netcons "${NETCONS_CONFIGFS}/cmdline0"
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do_cleanup
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rmmod netconsole
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}
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function trigger_reactivation() {
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# Add back low level module
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modprobe netdevsim
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# Recreate namespace and two interfaces
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set_network
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# Restore MACs
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ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" \
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address "${SAVED_DSTMAC}"
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if [ "${BINDMODE}" == "mac" ] &&
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[ "$(mac_get "${SRCIF}")" != "${SAVED_SRCMAC}" ]; then
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ip link set dev "${SRCIF}" down
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ip link set dev "${SRCIF}" address "${SAVED_SRCMAC}"
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# Rename device in order to trigger target resume, as initial
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# when device was recreated it didn't have correct mac address.
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ip link set dev "${SRCIF}" name "${TARGET}"
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fi
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}
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function trigger_deactivation() {
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# Start by storing mac addresses so we can be restored in reactivate
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SAVED_DSTMAC=$(ip netns exec "${NAMESPACE}" \
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cat /sys/class/net/"$DSTIF"/address)
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SAVED_SRCMAC=$(mac_get "${SRCIF}")
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# Remove low level module
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rmmod netdevsim
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}
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trap cleanup EXIT
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# Run the test twice, with different cmdline parameters
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for BINDMODE in "ifname" "mac"
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do
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echo "Running with bind mode: ${BINDMODE}" >&2
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# Set current loglevel to KERN_INFO(6), and default to KERN_NOTICE(5)
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echo "6 5" > /proc/sys/kernel/printk
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# Create one namespace and two interfaces
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set_network
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# Create the command line for netconsole, with the configuration from
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# the function above
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CMDLINE=$(create_cmdline_str "${BINDMODE}")
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# The content of kmsg will be save to the following file
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OUTPUT_FILE="/tmp/${TARGET}-${BINDMODE}"
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# Load the module, with the cmdline set
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modprobe netconsole "${CMDLINE}"
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# Expose cmdline target in configfs
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mkdir "${NETCONS_CONFIGFS}/cmdline0"
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# Target should be enabled
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wait_target_state "cmdline0" "enabled"
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# Trigger deactivation by unloading netdevsim module. Target should be
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# disabled.
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trigger_deactivation
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wait_target_state "cmdline0" "disabled"
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# Trigger reactivation by loading netdevsim, recreating the network and
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# restoring mac addresses. Target should be re-enabled.
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trigger_reactivation
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wait_target_state "cmdline0" "enabled"
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# Listen for netconsole port inside the namespace and destination
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# interface
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listen_port_and_save_to "${OUTPUT_FILE}" &
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# Wait for socat to start and listen to the port.
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wait_local_port_listen "${NAMESPACE}" "${PORT}" udp
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# Send the message
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echo "${MSG}: ${TARGET}" > /dev/kmsg
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# Wait until socat saves the file to disk
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busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}" || true
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# Make sure the message was received in the dst part
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# and exit
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validate_msg "${OUTPUT_FILE}"
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# kill socat in case it is still running
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pkill_socat
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# Cleanup & unload the module
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cleanup
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echo "${BINDMODE} : Test passed" >&2
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done
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trap - EXIT
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exit "${EXIT_STATUS}"
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