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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>
This commit is contained in:
Paolo Abeni 2023-02-07 19:44:58 +01:00 committed by Jakub Kicinski
parent 605cfa1b10
commit c12e0d5f26
3 changed files with 61 additions and 0 deletions
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1
tools/testing/selftests/net/Makefile
View File

@ -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

3
tools/testing/selftests/net/config
View File

@ -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

57
tools/testing/selftests/net/rps_default_mask.sh Executable file
View File

@ -0,0 +1,57 @@
#!/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