Commit 1ec2230f authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
Browse files

selftests: net: veth: add tests for set_channel 



Simple functional test for the newly exposed features.

Also add an optional stress test for the channel number
update under flood.

RFC v1 -> RFC v2:
 - add the stress test

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9d3684c2

tools/testing/selftests/net/veth.sh

+182 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ readonly NS_DST=$BASE$DST 
readonly BM_NET_V4=192.168.1.

readonly BM_NET_V6=2001:db8::



readonly NPROCS=`nproc`

readonly CPUS=`nproc`

ret=0



cleanup() {
@@ -75,6 +75,29 @@ chk_tso_flag() { 
	__chk_flag "$1" $2 $3 tcp-segmentation-offload

}



chk_channels() {

	local msg="$1"

	local target=$2

	local rx=$3

	local tx=$4



	local dev=veth$target



	local cur_rx=`ip netns exec $BASE$target ethtool -l $dev |\

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

		local cur_tx=`ip netns exec $BASE$target ethtool -l $dev |\

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

	local cur_combined=`ip netns exec $BASE$target ethtool -l $dev |\

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



	printf "%-60s" "$msg"

	if [ "$cur_rx" = "$rx" -a "$cur_tx" = "$tx" -a "$cur_combined" = "n/a" ]; then

		echo " ok "

	else

		echo " fail rx:$rx:$cur_rx tx:$tx:$cur_tx combined:n/a:$cur_combined"

	fi

}



chk_gro() {

	local msg="$1"

	local expected=$2
@@ -107,11 +130,100 @@ chk_gro() { 
	fi

}



__change_channels()

{

	local cur_cpu

	local end=$1

	local cur

	local i



	while true; do

		printf -v cur '%(%s)T'

		[ $cur -le $end ] || break



		for i in `seq 1 $CPUS`; do

			ip netns exec $NS_SRC ethtool -L veth$SRC rx $i tx $i

			ip netns exec $NS_DST ethtool -L veth$DST rx $i tx $i

		done



		for i in `seq 1 $((CPUS - 1))`; do

			cur_cpu=$((CPUS - $i))

			ip netns exec $NS_SRC ethtool -L veth$SRC rx $cur_cpu tx $cur_cpu

			ip netns exec $NS_DST ethtool -L veth$DST rx $cur_cpu tx $cur_cpu

		done

	done

}



__send_data() {

	local end=$1



	while true; do

		printf -v cur '%(%s)T'

		[ $cur -le $end ] || break



		ip netns exec $NS_SRC ./udpgso_bench_tx -4 -s 1000 -M 300 -D $BM_NET_V4$DST

	done

}



do_stress() {

	local end

	printf -v end '%(%s)T'

	end=$((end + $STRESS))



	ip netns exec $NS_SRC ethtool -L veth$SRC rx 3 tx 3

	ip netns exec $NS_DST ethtool -L veth$DST rx 3 tx 3



	ip netns exec $NS_DST ./udpgso_bench_rx &

	local rx_pid=$!



	echo "Running stress test for $STRESS seconds..."

	__change_channels $end &

	local ch_pid=$!

	__send_data $end &

	local data_pid_1=$!

	__send_data $end &

	local data_pid_2=$!

	__send_data $end &

	local data_pid_3=$!

	__send_data $end &

	local data_pid_4=$!



	wait $ch_pid $data_pid_1 $data_pid_2 $data_pid_3 $data_pid_4

	kill -9 $rx_pid

	echo "done"



	# restore previous setting

	ip netns exec $NS_SRC ethtool -L veth$SRC rx 2 tx 2

	ip netns exec $NS_DST ethtool -L veth$DST rx 2 tx 1

}



usage() {

	echo "Usage: $0 [-h] [-s <seconds>]"

	echo -e "\t-h: show this help"

	echo -e "\t-s: run optional stress tests for the given amount of seconds"

}



STRESS=0

while getopts "hs:" option; do

	case "$option" in

	"h")

		usage $0

		exit 0

		;;

	"s")

		STRESS=$OPTARG

		;;

	esac

done



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

	echo "Missing xdp_dummy helper. Build bpf selftest first"

	exit 1

fi



[ $CPUS -lt 2 ] && echo "Only one CPU available, some tests will be skipped"

[ $STRESS -gt 0 -a $CPUS -lt 3 ] && echo " stress test will be skipped, too"



create_ns

chk_gro_flag "default - gro flag" $SRC off

chk_gro_flag "        - peer gro flag" $DST off
@@ -134,6 +246,8 @@ chk_gro " - aggregation with TSO off" 1 
cleanup



create_ns

chk_channels "default channels" $DST 1 1



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
@@ -147,6 +261,56 @@ chk_gro " - aggregation with TSO off" 1 
cleanup



create_ns



CUR_TX=1

CUR_RX=1

if [ $CPUS -gt 1 ]; then

	ip netns exec $NS_DST ethtool -L veth$DST tx 2

	chk_channels "setting tx channels" $DST 1 2

	CUR_TX=2

fi



if [ $CPUS -gt 2 ]; then

	ip netns exec $NS_DST ethtool -L veth$DST rx 3 tx 3

	chk_channels "setting both rx and tx channels" $DST 3 3

	CUR_RX=3

	CUR_TX=3

fi



ip netns exec $NS_DST ethtool -L veth$DST combined 2 2>/dev/null

chk_channels "bad setting: combined channels" $DST $CUR_RX $CUR_TX



ip netns exec $NS_DST ethtool -L veth$DST tx $((CPUS + 1)) 2>/dev/null

chk_channels "setting invalid channels nr" $DST $CUR_RX $CUR_TX



if [ $CPUS -gt 1 ]; then

	# this also tests queues nr reduction

	ip netns exec $NS_DST ethtool -L veth$DST rx 1 tx 2 2>/dev/null

	ip netns exec $NS_SRC ethtool -L veth$SRC rx 1 tx 2 2>/dev/null

	printf "%-60s" "bad setting: XDP with RX nr less than TX"

	ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o \

		section xdp_dummy 2>/dev/null &&\

		echo "fail - set operation successful ?!?" || echo " ok "



	# the following tests will run with multiple channels active

	ip netns exec $NS_SRC ethtool -L veth$SRC rx 2

	ip netns exec $NS_DST ethtool -L veth$DST rx 2

	ip -n $NS_DST link set dev veth$DST xdp object ../bpf/xdp_dummy.o \

		section xdp_dummy 2>/dev/null

	printf "%-60s" "bad setting: reducing RX nr below peer TX with XDP set"

	ip netns exec $NS_DST ethtool -L veth$DST rx 1 2>/dev/null &&\

		echo "fail - set operation successful ?!?" || echo " ok "

	CUR_RX=2

	CUR_TX=2

fi



if [ $CPUS -gt 2 ]; then

	printf "%-60s" "bad setting: increasing peer TX nr above RX with XDP set"

	ip netns exec $NS_SRC ethtool -L veth$SRC tx 3 2>/dev/null &&\

		echo "fail - set operation successful ?!?" || echo " ok "

	chk_channels "setting invalid channels nr" $DST 2 2

fi



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
@@ -167,10 +331,27 @@ 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



if [ $CPUS -gt 1 ]; then

	ip netns exec $NS_DST ethtool -L veth$DST tx 1

	chk_channels "decreasing tx channels with device down" $DST 2 1

fi



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

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

chk_gro "        - aggregation" 1



if [ $CPUS -gt 1 ]; then

	[ $STRESS -gt 0 -a $CPUS -gt 2 ] && do_stress



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

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

	ip netns exec $NS_DST ethtool -L veth$DST tx 2

	chk_channels "increasing tx channels with device down" $DST 2 2

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

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

fi



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