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authorPaolo Abeni <pabeni@redhat.com>2023-02-07 21:44:58 +0300
committerJakub Kicinski <kuba@kernel.org>2023-02-10 04:45:55 +0300
commitc12e0d5f267d7eb45a2f8eaa9fd44eaa2871a95e (patch)
treea408253f02823f66dc55b29f1ba5b085ee7b1666 /tools
parent605cfa1b1090b5d9e227d8a8f7d08fdd04f07724 (diff)
downloadlinux-c12e0d5f267d7eb45a2f8eaa9fd44eaa2871a95e.tar.xz
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/net/Makefile1
-rw-r--r--tools/testing/selftests/net/config3
-rwxr-xr-xtools/testing/selftests/net/rps_default_mask.sh57
3 files changed, 61 insertions, 0 deletions
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