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: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 2d71b28..f4242a9 100644 (file)
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -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

diff --git a/tools/testing/selftests/net/veth.sh b/tools/testing/selftests/net/veth.sh
new file mode 100755 (executable)
index 0000000..2fedc07
--- /dev/null
+++ b/tools/testing/selftests/net/veth.sh
@@ -0,0 +1,177 @@
+#!/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