Commit 1c3cadbe authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
Browse files

self-tests: add veth tests 



Add some basic veth tests, that verify the expected flags and
aggregation with different setups (default, xdp, etc...)

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 47e550e0

tools/testing/selftests/net/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ TEST_PROGS += vrf_route_leaking.sh 
TEST_PROGS += bareudp.sh

TEST_PROGS += unicast_extensions.sh

TEST_PROGS += udpgro_fwd.sh

TEST_PROGS += veth.sh

TEST_PROGS_EXTENDED := in_netns.sh

TEST_GEN_FILES =  socket nettest

TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any

tools/testing/selftests/net/veth.sh

0 → 100755
+177 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0



readonly STATS="$(mktemp -p /tmp ns-XXXXXX)"

readonly BASE=`basename $STATS`

readonly SRC=2

readonly DST=1

readonly DST_NAT=100

readonly NS_SRC=$BASE$SRC

readonly NS_DST=$BASE$DST



# "baremetal" network used for raw UDP traffic

readonly BM_NET_V4=192.168.1.

readonly BM_NET_V6=2001:db8::



readonly NPROCS=`nproc`

ret=0



cleanup() {

	local ns

	local -r jobs="$(jobs -p)"

	[ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null

	rm -f $STATS



	for ns in $NS_SRC $NS_DST; do

		ip netns del $ns 2>/dev/null

	done

}



trap cleanup EXIT



create_ns() {

	local ns



	for ns in $NS_SRC $NS_DST; do

		ip netns add $ns

		ip -n $ns link set dev lo up

	done



	ip link add name veth$SRC type veth peer name veth$DST



	for ns in $SRC $DST; do

		ip link set dev veth$ns netns $BASE$ns up

		ip -n $BASE$ns addr add dev veth$ns $BM_NET_V4$ns/24

		ip -n $BASE$ns addr add dev veth$ns $BM_NET_V6$ns/64 nodad

	done

	echo "#kernel" > $BASE

	chmod go-rw $BASE

}



__chk_flag() {

	local msg="$1"

	local target=$2

	local expected=$3

	local flagname=$4



	local flag=`ip netns exec $BASE$target ethtool -k veth$target |\

		    grep $flagname | awk '{print $2}'`



	printf "%-60s" "$msg"

	if [ "$flag" = "$expected" ]; then

		echo " ok "

	else

		echo " fail - expected $expected found $flag"

		ret=1

	fi

}



chk_gro_flag() {

	__chk_flag "$1" $2 $3 generic-receive-offload

}



chk_tso_flag() {

	__chk_flag "$1" $2 $3 tcp-segmentation-offload

}



chk_gro() {

	local msg="$1"

	local expected=$2



	ip netns exec $BASE$SRC ping -qc 1 $BM_NET_V4$DST >/dev/null

	NSTAT_HISTORY=$STATS ip netns exec $NS_DST nstat -n



	printf "%-60s" "$msg"

	ip netns exec $BASE$DST ./udpgso_bench_rx -C 1000 -R 10 &

	local spid=$!

	sleep 0.1



	ip netns exec $NS_SRC ./udpgso_bench_tx -4 -s 13000 -S 1300 -M 1 -D $BM_NET_V4$DST

	local retc=$?

	wait $spid

	local rets=$?

	if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then

		echo " fail client exit code $retc, server $rets"

		ret=1

		return

	fi



	local pkts=`NSTAT_HISTORY=$STATS ip netns exec $NS_DST nstat IpInReceives | \

		    awk '{print $2}' | tail -n 1`

	if [ "$pkts" = "$expected" ]; then

		echo " ok "

	else

		echo " fail - got $pkts packets, expected $expected "

		ret=1

	fi

}



if [ ! -f ../bpf/xdp_dummy.o ]; then

	echo "Missing xdp_dummy helper. Build bpf selftest first"

	exit -1

fi



create_ns

chk_gro_flag "default - gro flag" $SRC off

chk_gro_flag "        - peer gro flag" $DST off

chk_tso_flag "        - tso flag" $SRC on

chk_tso_flag "        - peer tso flag" $DST on

chk_gro "        - aggregation" 1

ip netns exec $NS_SRC ethtool -K veth$SRC tx-udp-segmentation off

chk_gro "        - aggregation with TSO off" 10

cleanup



create_ns

ip netns exec $NS_DST ethtool -K veth$DST gro on

chk_gro_flag "with gro on - gro flag" $DST on

chk_gro_flag "        - peer gro flag" $SRC off

chk_tso_flag "        - tso flag" $SRC on

chk_tso_flag "        - peer tso flag" $DST on

ip netns exec $NS_SRC ethtool -K veth$SRC tx-udp-segmentation off

ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on

chk_gro "        - aggregation with TSO off" 1

cleanup



create_ns

ip -n $NS_DST link set dev veth$DST down

ip netns exec $NS_DST ethtool -K veth$DST gro on

chk_gro_flag "with gro enabled on link down - gro flag" $DST on

chk_gro_flag "        - peer gro flag" $SRC off

chk_tso_flag "        - tso flag" $SRC on

chk_tso_flag "        - peer tso flag" $DST on

ip -n $NS_DST link set dev veth$DST up

ip netns exec $NS_SRC ethtool -K veth$SRC tx-udp-segmentation off

ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on

chk_gro "        - aggregation with TSO off" 1

cleanup



create_ns

ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o section xdp_dummy 2>/dev/null

chk_gro_flag "with xdp attached - gro flag" $DST on

chk_gro_flag "        - peer gro flag" $SRC off

chk_tso_flag "        - tso flag" $SRC off

chk_tso_flag "        - peer tso flag" $DST on

ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on

chk_gro "        - aggregation" 1





ip -n $NS_DST link set dev veth$DST down

ip -n $NS_SRC link set dev veth$SRC down

chk_gro_flag "        - after dev off, flag" $DST on

chk_gro_flag "        - peer flag" $SRC off



ip netns exec $NS_DST ethtool -K veth$DST gro on

ip -n $NS_DST link set dev veth$DST xdp off

chk_gro_flag "        - after gro on xdp off, gro flag" $DST on

chk_gro_flag "        - peer gro flag" $SRC off

chk_tso_flag "        - tso flag" $SRC on

chk_tso_flag "        - peer tso flag" $DST on

ip -n $NS_DST link set dev veth$DST up

ip -n $NS_SRC link set dev veth$SRC up

chk_gro "        - aggregation" 1



ip netns exec $NS_DST ethtool -K veth$DST gro off

ip netns exec $NS_SRC ethtool -K veth$SRC tx-udp-segmentation off

chk_gro "aggregation again with default and TSO off" 10



exit $ret