projects/linux·blob master · refs

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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 <[email protected]>
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}: ${TARGET}" > /dev/kmsg
60 # Wait until socat saves the file to disk
61 if ! busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}"
62 then
63 echo "FAIL: Timed out waiting (${BUSYWAIT_TIMEOUT} ms) for netconsole message in ${OUTPUT_FILE}" >&2
64 exit "${ksft_fail}"
65 fi
66
67 # Make sure the message was received in the dst part
68 # and exit
69 validate_result "${OUTPUT_FILE}" "${FORMAT}"
70 # kill socat in case it is still running
71 pkill_socat
72 cleanup
73 echo "${FORMAT} : ${IP_VERSION} : Test passed" >&2
74 done
75done
76
77trap - EXIT
78exit "${ksft_pass}"