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#!/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
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