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mptcp: simult flow self-tests
Add a bunch of test-cases for multiple subflow xmit: create multiple subflows simulating different links condition via netem and verify that the msk is able to use completely the aggregated bandwidth. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni
David S. Miller
parent
c76c695656
commit
1a418cb8e8
2 changed files with 295 additions and 1 deletions
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@ -5,7 +5,8 @@ KSFT_KHDR_INSTALL := 1
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CFLAGS = -Wall -Wl,--no-as-needed -O2 -g -I$(top_srcdir)/usr/include
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TEST_PROGS := mptcp_connect.sh pm_netlink.sh mptcp_join.sh diag.sh
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TEST_PROGS := mptcp_connect.sh pm_netlink.sh mptcp_join.sh diag.sh \
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simult_flows.sh
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TEST_GEN_FILES = mptcp_connect pm_nl_ctl
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293
tools/testing/selftests/net/mptcp/simult_flows.sh
Executable file
293
tools/testing/selftests/net/mptcp/simult_flows.sh
Executable file
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@ -0,0 +1,293 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
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ns1="ns1-$rndh"
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ns2="ns2-$rndh"
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ns3="ns3-$rndh"
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capture=false
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ksft_skip=4
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timeout=30
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test_cnt=1
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ret=0
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bail=0
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usage() {
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echo "Usage: $0 [ -b ] [ -c ] [ -d ]"
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echo -e "\t-b: bail out after first error, otherwise runs al testcases"
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echo -e "\t-c: capture packets for each test using tcpdump (default: no capture)"
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echo -e "\t-d: debug this script"
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}
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cleanup()
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{
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rm -f "$cin" "$cout"
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rm -f "$sin" "$sout"
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rm -f "$capout"
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local netns
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for netns in "$ns1" "$ns2" "$ns3";do
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ip netns del $netns
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done
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}
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ip -Version > /dev/null 2>&1
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if [ $? -ne 0 ];then
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echo "SKIP: Could not run test without ip tool"
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exit $ksft_skip
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fi
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# "$ns1" ns2 ns3
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# ns1eth1 ns2eth1 ns2eth3 ns3eth1
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# netem
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# ns1eth2 ns2eth2
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# netem
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setup()
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{
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large=$(mktemp)
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small=$(mktemp)
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sout=$(mktemp)
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cout=$(mktemp)
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capout=$(mktemp)
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size=$((2048 * 4096))
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dd if=/dev/zero of=$small bs=4096 count=20 >/dev/null 2>&1
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dd if=/dev/zero of=$large bs=4096 count=$((size / 4096)) >/dev/null 2>&1
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trap cleanup EXIT
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for i in "$ns1" "$ns2" "$ns3";do
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ip netns add $i || exit $ksft_skip
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ip -net $i link set lo up
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done
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ip link add ns1eth1 netns "$ns1" type veth peer name ns2eth1 netns "$ns2"
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ip link add ns1eth2 netns "$ns1" type veth peer name ns2eth2 netns "$ns2"
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ip link add ns2eth3 netns "$ns2" type veth peer name ns3eth1 netns "$ns3"
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ip -net "$ns1" addr add 10.0.1.1/24 dev ns1eth1
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ip -net "$ns1" addr add dead:beef:1::1/64 dev ns1eth1 nodad
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ip -net "$ns1" link set ns1eth1 up mtu 1500
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ip -net "$ns1" route add default via 10.0.1.2
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ip -net "$ns1" route add default via dead:beef:1::2
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ip -net "$ns1" addr add 10.0.2.1/24 dev ns1eth2
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ip -net "$ns1" addr add dead:beef:2::1/64 dev ns1eth2 nodad
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ip -net "$ns1" link set ns1eth2 up mtu 1500
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ip -net "$ns1" route add default via 10.0.2.2 metric 101
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ip -net "$ns1" route add default via dead:beef:2::2 metric 101
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ip netns exec "$ns1" ./pm_nl_ctl limits 1 1
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ip netns exec "$ns1" ./pm_nl_ctl add 10.0.2.1 dev ns1eth2 flags subflow
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ip netns exec "$ns1" sysctl -q net.ipv4.conf.all.rp_filter=0
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ip -net "$ns2" addr add 10.0.1.2/24 dev ns2eth1
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ip -net "$ns2" addr add dead:beef:1::2/64 dev ns2eth1 nodad
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ip -net "$ns2" link set ns2eth1 up mtu 1500
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ip -net "$ns2" addr add 10.0.2.2/24 dev ns2eth2
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ip -net "$ns2" addr add dead:beef:2::2/64 dev ns2eth2 nodad
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ip -net "$ns2" link set ns2eth2 up mtu 1500
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ip -net "$ns2" addr add 10.0.3.2/24 dev ns2eth3
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ip -net "$ns2" addr add dead:beef:3::2/64 dev ns2eth3 nodad
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ip -net "$ns2" link set ns2eth3 up mtu 1500
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ip netns exec "$ns2" sysctl -q net.ipv4.ip_forward=1
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ip netns exec "$ns2" sysctl -q net.ipv6.conf.all.forwarding=1
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ip -net "$ns3" addr add 10.0.3.3/24 dev ns3eth1
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ip -net "$ns3" addr add dead:beef:3::3/64 dev ns3eth1 nodad
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ip -net "$ns3" link set ns3eth1 up mtu 1500
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ip -net "$ns3" route add default via 10.0.3.2
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ip -net "$ns3" route add default via dead:beef:3::2
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ip netns exec "$ns3" ./pm_nl_ctl limits 1 1
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}
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# $1: ns, $2: port
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wait_local_port_listen()
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{
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local listener_ns="${1}"
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local port="${2}"
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local port_hex i
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port_hex="$(printf "%04X" "${port}")"
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for i in $(seq 10); do
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ip netns exec "${listener_ns}" cat /proc/net/tcp* | \
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awk "BEGIN {rc=1} {if (\$2 ~ /:${port_hex}\$/ && \$4 ~ /0A/) {rc=0; exit}} END {exit rc}" &&
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break
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sleep 0.1
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done
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}
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do_transfer()
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{
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local cin=$1
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local sin=$2
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local max_time=$3
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local port
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port=$((10000+$test_cnt))
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test_cnt=$((test_cnt+1))
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:> "$cout"
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:> "$sout"
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:> "$capout"
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local addr_port
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addr_port=$(printf "%s:%d" ${connect_addr} ${port})
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if $capture; then
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local capuser
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if [ -z $SUDO_USER ] ; then
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capuser=""
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else
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capuser="-Z $SUDO_USER"
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fi
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local capfile="${rndh}-${port}"
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local capopt="-i any -s 65535 -B 32768 ${capuser}"
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ip netns exec ${ns3} tcpdump ${capopt} -w "${capfile}-listener.pcap" >> "${capout}" 2>&1 &
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local cappid_listener=$!
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ip netns exec ${ns1} tcpdump ${capopt} -w "${capfile}-connector.pcap" >> "${capout}" 2>&1 &
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local cappid_connector=$!
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sleep 1
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fi
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ip netns exec ${ns3} ./mptcp_connect -jt $timeout -l -p $port 0.0.0.0 < "$sin" > "$sout" &
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local spid=$!
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wait_local_port_listen "${ns3}" "${port}"
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local start
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start=$(date +%s%3N)
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ip netns exec ${ns1} ./mptcp_connect -jt $timeout -p $port 10.0.3.3 < "$cin" > "$cout" &
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local cpid=$!
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wait $cpid
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local retc=$?
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wait $spid
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local rets=$?
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local stop
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stop=$(date +%s%3N)
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if $capture; then
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sleep 1
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kill ${cappid_listener}
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kill ${cappid_connector}
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fi
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local duration
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duration=$((stop-start))
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cmp $sin $cout > /dev/null 2>&1
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local cmps=$?
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cmp $cin $sout > /dev/null 2>&1
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local cmpc=$?
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printf "%16s" "$duration max $max_time "
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if [ $retc -eq 0 ] && [ $rets -eq 0 ] && \
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[ $cmpc -eq 0 ] && [ $cmps -eq 0 ] && \
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[ $duration -lt $max_time ]; then
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echo "[ OK ]"
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cat "$capout"
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return 0
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fi
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echo " [ fail ]"
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echo "client exit code $retc, server $rets" 1>&2
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echo "\nnetns ${ns3} socket stat for $port:" 1>&2
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ip netns exec ${ns3} ss -nita 1>&2 -o "sport = :$port"
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echo "\nnetns ${ns1} socket stat for $port:" 1>&2
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ip netns exec ${ns1} ss -nita 1>&2 -o "dport = :$port"
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ls -l $sin $cout
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ls -l $cin $sout
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cat "$capout"
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return 1
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}
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run_test()
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{
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local rate1=$1
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local rate2=$2
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local delay1=$3
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local delay2=$4
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local lret
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local dev
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shift 4
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local msg=$*
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[ $delay1 -gt 0 ] && delay1="delay $delay1" || delay1=""
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[ $delay2 -gt 0 ] && delay2="delay $delay2" || delay2=""
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for dev in ns1eth1 ns1eth2; do
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tc -n $ns1 qdisc del dev $dev root >/dev/null 2>&1
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done
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for dev in ns2eth1 ns2eth2; do
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tc -n $ns2 qdisc del dev $dev root >/dev/null 2>&1
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done
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tc -n $ns1 qdisc add dev ns1eth1 root netem rate ${rate1}mbit $delay1
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tc -n $ns1 qdisc add dev ns1eth2 root netem rate ${rate2}mbit $delay2
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tc -n $ns2 qdisc add dev ns2eth1 root netem rate ${rate1}mbit $delay1
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tc -n $ns2 qdisc add dev ns2eth2 root netem rate ${rate2}mbit $delay2
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# time is measure in ms
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local time=$((size * 8 * 1000 / (( $rate1 + $rate2) * 1024 *1024) ))
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# mptcp_connect will do some sleeps to allow the mp_join handshake
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# completion
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time=$((time + 1350))
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printf "%-50s" "$msg"
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do_transfer $small $large $((time * 11 / 10))
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lret=$?
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if [ $lret -ne 0 ]; then
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ret=$lret
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[ $bail -eq 0 ] || exit $ret
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fi
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printf "%-50s" "$msg - reverse direction"
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do_transfer $large $small $((time * 11 / 10))
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lret=$?
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if [ $lret -ne 0 ]; then
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ret=$lret
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[ $bail -eq 0 ] || exit $ret
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fi
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}
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while getopts "bcdh" option;do
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case "$option" in
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"h")
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usage $0
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exit 0
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;;
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"b")
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bail=1
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;;
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"c")
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capture=true
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;;
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"d")
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set -x
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;;
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"?")
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usage $0
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exit 1
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;;
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esac
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done
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setup
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run_test 10 10 0 0 "balanced bwidth"
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run_test 10 10 1 50 "balanced bwidth with unbalanced delay"
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# we still need some additional infrastructure to pass the following test-cases
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# run_test 30 10 0 0 "unbalanced bwidth"
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# run_test 30 10 1 50 "unbalanced bwidth with unbalanced delay"
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# run_test 30 10 50 1 "unbalanced bwidth with opposed, unbalanced delay"
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exit $ret
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