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Message-Id: <d613312e738ec8910fb235376f3dbe2b8186e352.1675708062.git.pabeni@redhat.com>
Date: Mon, 6 Feb 2023 19:30:22 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>
Subject: [PATCH v3 net-next 4/4] 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@...hat.com>
---
tools/testing/selftests/net/Makefile | 1 +
tools/testing/selftests/net/config | 3 +
.../testing/selftests/net/rps_default_mask.sh | 57 +++++++++++++++++++
3 files changed, 61 insertions(+)
create mode 100755 tools/testing/selftests/net/rps_default_mask.sh
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 951bd5342bc6..3364c548a23b 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -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
diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
index bd89198cd817..cc9fd55ab869 100644
--- a/tools/testing/selftests/net/config
+++ b/tools/testing/selftests/net/config
@@ -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
diff --git a/tools/testing/selftests/net/rps_default_mask.sh b/tools/testing/selftests/net/rps_default_mask.sh
new file mode 100755
index 000000000000..c81c0ac7ddfe
--- /dev/null
+++ b/tools/testing/selftests/net/rps_default_mask.sh
@@ -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
--
2.39.1
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