mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-05 08:44:14 +02:00
Yuyang Huang
e74058f561
This commit adds a new kernel selftest to verify RTNLGRP_IPV4_MCADDR and RTNLGRP_IPV6_MCADDR notifications. The test works by adding and removing a dummy interface and then confirming that the system correctly receives join and removal notifications for the 224.0.0.1 and ff02::1 multicast addresses. The test relies on the iproute2 version to be 6.13+. Tested by the following command: $ vng -v --user root --cpus 16 -- \ make -C tools/testing/selftests TARGETS=net TEST_PROGS=rtnetlink_notification.sh \ TEST_GEN_PROGS="" run_tests Cc: Maciej Żenczykowski <maze@google.com> Cc: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: Yuyang Huang <yuyanghuang@google.com> Link: https://patch.msgid.link/20250614053522.623820-1-yuyanghuang@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
71 lines
1.5 KiB
Bash
Executable File
71 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# This test is for checking rtnetlink notification callpaths, and get as much
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# coverage as possible.
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#
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# set -e
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ALL_TESTS="
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kci_test_mcast_addr_notification
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"
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source lib.sh
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kci_test_mcast_addr_notification()
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{
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RET=0
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local tmpfile
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local monitor_pid
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local match_result
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local test_dev="test-dummy1"
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tmpfile=$(mktemp)
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defer rm "$tmpfile"
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ip monitor maddr > $tmpfile &
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monitor_pid=$!
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defer kill_process "$monitor_pid"
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sleep 1
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if [ ! -e "/proc/$monitor_pid" ]; then
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RET=$ksft_skip
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log_test "mcast addr notification: iproute2 too old"
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return $RET
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fi
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ip link add name "$test_dev" type dummy
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check_err $? "failed to add dummy interface"
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ip link set "$test_dev" up
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check_err $? "failed to set dummy interface up"
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ip link del dev "$test_dev"
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check_err $? "Failed to delete dummy interface"
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sleep 1
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# There should be 4 line matches as follows.
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# 13: test-dummy1 inet6 mcast ff02::1 scope global
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# 13: test-dummy1 inet mcast 224.0.0.1 scope global
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# Deleted 13: test-dummy1 inet mcast 224.0.0.1 scope global
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# Deleted 13: test-dummy1 inet6 mcast ff02::1 scope global
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match_result=$(grep -cE "$test_dev.*(224.0.0.1|ff02::1)" "$tmpfile")
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if [ "$match_result" -ne 4 ]; then
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RET=$ksft_fail
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fi
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log_test "mcast addr notification: Expected 4 matches, got $match_result"
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return $RET
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}
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#check for needed privileges
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if [ "$(id -u)" -ne 0 ];then
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RET=$ksft_skip
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log_test "need root privileges"
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exit $RET
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fi
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require_command ip
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tests_run
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exit $EXIT_STATUS
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