Commit c12e0d5f authored by Paolo Abeni's avatar Paolo Abeni Committed by Jakub Kicinski
Browse files

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: default avatarPaolo Abeni <pabeni@redhat.com>
Reviewed-by: default avatarSimon Horman <simon.horman@corigine.com>
Reviewed-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 605cfa1b

tools/testing/selftests/net/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ TEST_PROGS += stress_reuseport_listen.sh 
TEST_PROGS += l2_tos_ttl_inherit.sh

TEST_PROGS += bind_bhash.sh

TEST_PROGS += ip_local_port_range.sh

TEST_PROGS += rps_default_mask.sh

TEST_PROGS_EXTENDED := in_netns.sh setup_loopback.sh setup_veth.sh

TEST_PROGS_EXTENDED += toeplitz_client.sh toeplitz.sh

TEST_GEN_FILES =  socket nettest

tools/testing/selftests/net/config

+3 −0
Original line number Diff line number Diff line
@@ -3,6 +3,9 @@ CONFIG_NET_NS=y 
CONFIG_BPF_SYSCALL=y

CONFIG_TEST_BPF=m

CONFIG_NUMA=y

CONFIG_RPS=y

CONFIG_SYSFS=y

CONFIG_PROC_SYSCTL=y

CONFIG_NET_VRF=y

CONFIG_NET_L3_MASTER_DEV=y

CONFIG_IPV6=y

tools/testing/selftests/net/rps_default_mask.sh

0 → 100755
+57 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0



readonly ksft_skip=4

readonly cpus=$(nproc)

ret=0



[ $cpus -gt 2 ] || exit $ksft_skip



readonly INITIAL_RPS_DEFAULT_MASK=$(cat /proc/sys/net/core/rps_default_mask)

readonly NETNS="ns-$(mktemp -u XXXXXX)"



setup() {

	ip netns add "${NETNS}"

	ip -netns "${NETNS}" link set lo up

}



cleanup() {

	echo $INITIAL_RPS_DEFAULT_MASK > /proc/sys/net/core/rps_default_mask

	ip netns del $NETNS

}



chk_rps() {

	local rps_mask expected_rps_mask=$3

	local dev_name=$2

	local msg=$1



	rps_mask=$(ip netns exec $NETNS cat /sys/class/net/$dev_name/queues/rx-0/rps_cpus)

	printf "%-60s" "$msg"

	if [ $rps_mask -eq $expected_rps_mask ]; then

		echo "[ ok ]"

	else

		echo "[fail] expected $expected_rps_mask found $rps_mask"

		ret=1

	fi

}



trap cleanup EXIT



echo 0 > /proc/sys/net/core/rps_default_mask

setup

chk_rps "empty rps_default_mask" lo 0

cleanup



echo 1 > /proc/sys/net/core/rps_default_mask

setup

chk_rps "non zero rps_default_mask" lo 1



echo 3 > /proc/sys/net/core/rps_default_mask

chk_rps "changing rps_default_mask dont affect existing netns" lo 1



ip -n $NETNS link add type veth

ip -n $NETNS link set dev veth0 up

ip -n $NETNS link set dev veth1 up

chk_rps "changing rps_default_mask affect newly created devices" veth0 3

chk_rps "changing rps_default_mask affect newly created devices[II]" veth1 3

exit $ret