76 lines
2.1 KiB
Bash
76 lines
2.1 KiB
Bash
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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readonly ksft_skip=4
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readonly cpus=$(nproc)
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ret=0
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[ $cpus -gt 2 ] || exit $ksft_skip
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readonly INITIAL_RPS_DEFAULT_MASK=$(cat /proc/sys/net/core/rps_default_mask)
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readonly TAG="$(mktemp -u XXXXXX)"
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readonly VETH="veth${TAG}"
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readonly NETNS="ns-${TAG}"
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setup() {
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ip netns add "${NETNS}"
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ip -netns "${NETNS}" link set lo up
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}
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cleanup() {
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echo $INITIAL_RPS_DEFAULT_MASK > /proc/sys/net/core/rps_default_mask
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ip netns del $NETNS
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}
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chk_rps() {
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local rps_mask expected_rps_mask=$4
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local dev_name=$3
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local netns=$2
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local cmd="cat"
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local msg=$1
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[ -n "$netns" ] && cmd="ip netns exec $netns $cmd"
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rps_mask=$($cmd /sys/class/net/$dev_name/queues/rx-0/rps_cpus)
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printf "%-60s" "$msg"
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if [ $rps_mask -eq $expected_rps_mask ]; then
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echo "[ ok ]"
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else
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echo "[fail] expected $expected_rps_mask found $rps_mask"
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ret=1
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fi
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}
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trap cleanup EXIT
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echo 0 > /proc/sys/net/core/rps_default_mask
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setup
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chk_rps "empty rps_default_mask" $NETNS lo 0
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cleanup
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echo 1 > /proc/sys/net/core/rps_default_mask
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setup
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chk_rps "changing rps_default_mask dont affect existing devices" "" lo $INITIAL_RPS_DEFAULT_MASK
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echo 3 > /proc/sys/net/core/rps_default_mask
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chk_rps "changing rps_default_mask dont affect existing netns" $NETNS lo 0
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ip link add name $VETH type veth peer netns $NETNS name $VETH
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ip link set dev $VETH up
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ip -n $NETNS link set dev $VETH up
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chk_rps "changing rps_default_mask affect newly created devices" "" $VETH 3
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chk_rps "changing rps_default_mask don't affect newly child netns[II]" $NETNS $VETH 0
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ip link del dev $VETH
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ip netns del $NETNS
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setup
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chk_rps "rps_default_mask is 0 by default in child netns" "$NETNS" lo 0
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ip netns exec $NETNS sysctl -qw net.core.rps_default_mask=1
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ip link add name $VETH type veth peer netns $NETNS name $VETH
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chk_rps "changing rps_default_mask in child ns don't affect the main one" "" lo $INITIAL_RPS_DEFAULT_MASK
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chk_rps "changing rps_default_mask in child ns affects new childns devices" $NETNS $VETH 1
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chk_rps "changing rps_default_mask in child ns don't affect existing devices" $NETNS lo 0
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exit $ret
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