tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
self-tests: introduce self-tests for RPS default mask
Ensure that RPS default mask changes take place on
all newly created netns/devices and don't affect
existing ones.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
authored by
Paolo Abeni
and committed by
Jakub Kicinski
c12e0d5f
605cfa1b
+61
+1
tools/testing/selftests/net/Makefile
+1
tools/testing/selftests/net/Makefile
···
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TEST_PROGS += l2_tos_ttl_inherit.sh
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TEST_PROGS += bind_bhash.sh
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TEST_PROGS += ip_local_port_range.sh
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TEST_PROGS += rps_default_mask.sh
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TEST_PROGS_EXTENDED := in_netns.sh setup_loopback.sh setup_veth.sh
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TEST_PROGS_EXTENDED += toeplitz_client.sh toeplitz.sh
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TEST_GEN_FILES = socket nettest
+3
tools/testing/selftests/net/config
+3
tools/testing/selftests/net/config
+57
tools/testing/selftests/net/rps_default_mask.sh
+57
tools/testing/selftests/net/rps_default_mask.sh
···
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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readonly ksft_skip=4
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readonly cpus=$(nproc)
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ret=0
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[ $cpus -gt 2 ] || exit $ksft_skip
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readonly INITIAL_RPS_DEFAULT_MASK=$(cat /proc/sys/net/core/rps_default_mask)
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readonly NETNS="ns-$(mktemp -u XXXXXX)"
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setup() {
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ip netns add "${NETNS}"
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ip -netns "${NETNS}" link set lo up
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}
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cleanup() {
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echo $INITIAL_RPS_DEFAULT_MASK > /proc/sys/net/core/rps_default_mask
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ip netns del $NETNS
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}
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chk_rps() {
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local rps_mask expected_rps_mask=$3
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local dev_name=$2
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local msg=$1
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rps_mask=$(ip netns exec $NETNS cat /sys/class/net/$dev_name/queues/rx-0/rps_cpus)
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printf "%-60s" "$msg"
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if [ $rps_mask -eq $expected_rps_mask ]; then
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echo "[ ok ]"
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else
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echo "[fail] expected $expected_rps_mask found $rps_mask"
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ret=1
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fi
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}
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trap cleanup EXIT
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echo 0 > /proc/sys/net/core/rps_default_mask
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setup
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chk_rps "empty rps_default_mask" lo 0
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cleanup
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echo 1 > /proc/sys/net/core/rps_default_mask
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setup
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chk_rps "non zero rps_default_mask" lo 1
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echo 3 > /proc/sys/net/core/rps_default_mask
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chk_rps "changing rps_default_mask dont affect existing netns" lo 1
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ip -n $NETNS link add type veth
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ip -n $NETNS link set dev veth0 up
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ip -n $NETNS link set dev veth1 up
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chk_rps "changing rps_default_mask affect newly created devices" veth0 3
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chk_rps "changing rps_default_mask affect newly created devices[II]" veth1 3
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exit $ret