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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Run a series of udpgro functional tests.
readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
cleanup() {
local -r jobs="$(jobs -p)"
local -r ns="$(ip netns list|grep $PEER_NS)"
[ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null
[ -n "$ns" ] && ip netns del $ns 2>/dev/null
}
trap cleanup EXIT
cfg_veth() {
ip netns add "${PEER_NS}"
ip -netns "${PEER_NS}" link set lo up
ip link add type veth
ip link set dev veth0 up
ip addr add dev veth0 192.168.1.2/24
ip addr add dev veth0 2001:db8::2/64 nodad
ip link set dev veth1 netns "${PEER_NS}"
ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
ip -netns "${PEER_NS}" link set dev veth1 up
ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy
}
run_one() {
# use 'rx' as separator between sender args and receiver args
local -r all="$@"
local -r tx_args=${all%rx*}
local -r rx_args=${all#*rx}
cfg_veth
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} && \
echo "ok" || \
echo "failed" &
# Hack: let bg programs complete the startup
sleep 0.1
./udpgso_bench_tx ${tx_args}
wait $(jobs -p)
}
run_test() {
local -r args=$@
printf " %-40s" "$1"
./in_netns.sh $0 __subprocess $2 rx -G -r $3
}
run_one_nat() {
# use 'rx' as separator between sender args and receiver args
local addr1 addr2 pid family="" ipt_cmd=ip6tables
local -r all="$@"
local -r tx_args=${all%rx*}
local -r rx_args=${all#*rx}
if [[ ${tx_args} = *-4* ]]; then
ipt_cmd=iptables
family=-4
addr1=192.168.1.1
addr2=192.168.1.3/24
else
addr1=2001:db8::1
addr2="2001:db8::3/64 nodad"
fi
cfg_veth
ip -netns "${PEER_NS}" addr add dev veth1 ${addr2}
# fool the GRO engine changing the destination address ...
ip netns exec "${PEER_NS}" $ipt_cmd -t nat -I PREROUTING -d ${addr1} -j DNAT --to-destination ${addr2%/*}
# ... so that GRO will match the UDP_GRO enabled socket, but packets
# will land on the 'plain' one
ip netns exec "${PEER_NS}" ./udpgso_bench_rx -G ${family} -b ${addr1} -n 0 &
pid=$!
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${family} -b ${addr2%/*} ${rx_args} && \
echo "ok" || \
echo "failed"&
sleep 0.1
./udpgso_bench_tx ${tx_args}
kill -INT $pid
wait $(jobs -p)
}
run_one_2sock() {
# use 'rx' as separator between sender args and receiver args
local -r all="$@"
local -r tx_args=${all%rx*}
local -r rx_args=${all#*rx}
cfg_veth
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -p 12345 &
ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} && \
echo "ok" || \
echo "failed" &
# Hack: let bg programs complete the startup
sleep 0.1
./udpgso_bench_tx ${tx_args} -p 12345
sleep 0.1
# first UDP GSO socket should be closed at this point
./udpgso_bench_tx ${tx_args}
wait $(jobs -p)
}
run_nat_test() {
local -r args=$@
printf " %-40s" "$1"
./in_netns.sh $0 __subprocess_nat $2 rx -r $3
}
run_2sock_test() {
local -r args=$@
printf " %-40s" "$1"
./in_netns.sh $0 __subprocess_2sock $2 rx -G -r $3
}
run_all() {
local -r core_args="-l 4"
local -r ipv4_args="${core_args} -4 -D 192.168.1.1"
local -r ipv6_args="${core_args} -6 -D 2001:db8::1"
echo "ipv4"
run_test "no GRO" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400"
# explicitly check we are not receiving UDP_SEGMENT cmsg (-S -1)
# when GRO does not take place
run_test "no GRO chk cmsg" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400 -S -1"
# the GSO packets are aggregated because:
# * veth schedule napi after each xmit
# * segmentation happens in BH context, veth napi poll is delayed after
# the transmission of the last segment
run_test "GRO" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720"
run_test "GRO chk cmsg" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720 -S 1472"
run_test "GRO with custom segment size" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720"
run_test "GRO with custom segment size cmsg" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720 -S 500"
run_nat_test "bad GRO lookup" "${ipv4_args} -M 1 -s 14720 -S 0" "-n 10 -l 1472"
run_2sock_test "multiple GRO socks" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720 -S 1472"
echo "ipv6"
run_test "no GRO" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400"
run_test "no GRO chk cmsg" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400 -S -1"
run_test "GRO" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520"
run_test "GRO chk cmsg" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520 -S 1452"
run_test "GRO with custom segment size" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520"
run_test "GRO with custom segment size cmsg" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520 -S 500"
run_nat_test "bad GRO lookup" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 10 -l 1452"
run_2sock_test "multiple GRO socks" "${ipv6_args} -M 1 -s 14520 -S 0 " "-n 1 -l 14520 -S 1452"
}
if [ ! -f ../bpf/xdp_dummy.o ]; then
echo "Missing xdp_dummy helper. Build bpf selftest first"
exit -1
fi
if [[ $# -eq 0 ]]; then
run_all
elif [[ $1 == "__subprocess" ]]; then
shift
run_one $@
elif [[ $1 == "__subprocess_nat" ]]; then
shift
run_one_nat $@
elif [[ $1 == "__subprocess_2sock" ]]; then
shift
run_one_2sock $@
fi
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