Merge tag 'net-6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from netfilter.

  Current release - regressions:

   - tcp: fix cleanup and leaks in tcp_read_skb() (the new way BPF
     socket maps get data out of the TCP stack)

   - tls: rx: react to strparser initialization errors

   - netfilter: nf_tables: fix scheduling-while-atomic splat

   - net: fix suspicious RCU usage in bpf_sk_reuseport_detach()

  Current release - new code bugs:

   - mlxsw: ptp: fix a couple of races, static checker warnings and
     error handling

  Previous releases - regressions:

   - netfilter:
      - nf_tables: fix possible module reference underflow in error path
      - make conntrack helpers deal with BIG TCP (skbs > 64kB)
      - nfnetlink: re-enable conntrack expectation events

   - net: fix potential refcount leak in ndisc_router_discovery()

  Previous releases - always broken:

   - sched: cls_route: disallow handle of 0

   - neigh: fix possible local DoS due to net iface start/stop loop

   - rtnetlink: fix module refcount leak in rtnetlink_rcv_msg

   - sched: fix adding qlen to qcpu->backlog in gnet_stats_add_queue_cpu

   - virtio_net: fix endian-ness for RSS

   - dsa: mv88e6060: prevent crash on an unused port

   - fec: fix timer capture timing in `fec_ptp_enable_pps()`

   - ocelot: stats: fix races, integer wrapping and reading incorrect
     registers (the change of register definitions here accounts for
     bulk of the changed LoC in this PR)"

* tag 'net-6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (77 commits)
  net: moxa: MAC address reading, generating, validity checking
  tcp: handle pure FIN case correctly
  tcp: refactor tcp_read_skb() a bit
  tcp: fix tcp_cleanup_rbuf() for tcp_read_skb()
  tcp: fix sock skb accounting in tcp_read_skb()
  igb: Add lock to avoid data race
  dt-bindings: Fix incorrect "the the" corrections
  net: genl: fix error path memory leak in policy dumping
  stmmac: intel: Add a missing clk_disable_unprepare() call in intel_eth_pci_remove()
  net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_xdp_run
  net/mlx5e: Allocate flow steering storage during uplink initialization
  net: mscc: ocelot: report ndo_get_stats64 from the wraparound-resistant ocelot->stats
  net: mscc: ocelot: keep ocelot_stat_layout by reg address, not offset
  net: mscc: ocelot: make struct ocelot_stat_layout array indexable
  net: mscc: ocelot: fix race between ndo_get_stats64 and ocelot_check_stats_work
  net: mscc: ocelot: turn stats_lock into a spinlock
  net: mscc: ocelot: fix address of SYS_COUNT_TX_AGING counter
  net: mscc: ocelot: fix incorrect ndo_get_stats64 packet counters
  net: dsa: felix: fix ethtool 256-511 and 512-1023 TX packet counters
  net: dsa: don't warn in dsa_port_set_state_now() when driver doesn't support it
  ...

1 files changed, 207 insertions, 170 deletions

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index d4ffebb989f8..7060bae04ec8 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -14,13 +14,17 @@
 # nft_flowtable.sh -o8000 -l1500 -r2000
 #
 
+sfx=$(mktemp -u "XXXXXXXX")
+ns1="ns1-$sfx"
+ns2="ns2-$sfx"
+nsr1="nsr1-$sfx"
+nsr2="nsr2-$sfx"
 
 # Kselftest framework requirement - SKIP code is 4.
 ksft_skip=4
 ret=0
 
-ns1in=""
-ns2in=""
+nsin=""
 ns1out=""
 ns2out=""
 
@@ -36,21 +40,19 @@ checktool (){
 checktool "nft --version" "run test without nft tool"
 checktool "ip -Version" "run test without ip tool"
 checktool "which nc" "run test without nc (netcat)"
-checktool "ip netns add nsr1" "create net namespace"
+checktool "ip netns add $nsr1" "create net namespace $nsr1"
 
-ip netns add ns1
-ip netns add ns2
-
-ip netns add nsr2
+ip netns add $ns1
+ip netns add $ns2
+ip netns add $nsr2
 
 cleanup() {
-	for i in 1 2; do
-		ip netns del ns$i
-		ip netns del nsr$i
-	done
+	ip netns del $ns1
+	ip netns del $ns2
+	ip netns del $nsr1
+	ip netns del $nsr2
 
-	rm -f "$ns1in" "$ns1out"
-	rm -f "$ns2in" "$ns2out"
+	rm -f "$nsin" "$ns1out" "$ns2out"
 
 	[ $log_netns -eq 0 ] && sysctl -q net.netfilter.nf_log_all_netns=$log_netns
 }
@@ -59,22 +61,21 @@ trap cleanup EXIT
 
 sysctl -q net.netfilter.nf_log_all_netns=1
 
-ip link add veth0 netns nsr1 type veth peer name eth0 netns ns1
-ip link add veth1 netns nsr1 type veth peer name veth0 netns nsr2
+ip link add veth0 netns $nsr1 type veth peer name eth0 netns $ns1
+ip link add veth1 netns $nsr1 type veth peer name veth0 netns $nsr2
 
-ip link add veth1 netns nsr2 type veth peer name eth0 netns ns2
+ip link add veth1 netns $nsr2 type veth peer name eth0 netns $ns2
 
 for dev in lo veth0 veth1; do
-  for i in 1 2; do
-    ip -net nsr$i link set $dev up
-  done
+    ip -net $nsr1 link set $dev up
+    ip -net $nsr2 link set $dev up
 done
 
-ip -net nsr1 addr add 10.0.1.1/24 dev veth0
-ip -net nsr1 addr add dead:1::1/64 dev veth0
+ip -net $nsr1 addr add 10.0.1.1/24 dev veth0
+ip -net $nsr1 addr add dead:1::1/64 dev veth0
 
-ip -net nsr2 addr add 10.0.2.1/24 dev veth1
-ip -net nsr2 addr add dead:2::1/64 dev veth1
+ip -net $nsr2 addr add 10.0.2.1/24 dev veth1
+ip -net $nsr2 addr add dead:2::1/64 dev veth1
 
 # set different MTUs so we need to push packets coming from ns1 (large MTU)
 # to ns2 (smaller MTU) to stack either to perform fragmentation (ip_no_pmtu_disc=1),
@@ -106,85 +107,76 @@ do
 	esac
 done
 
-if ! ip -net nsr1 link set veth0 mtu $omtu; then
+if ! ip -net $nsr1 link set veth0 mtu $omtu; then
 	exit 1
 fi
 
-ip -net ns1 link set eth0 mtu $omtu
+ip -net $ns1 link set eth0 mtu $omtu
 
-if ! ip -net nsr2 link set veth1 mtu $rmtu; then
+if ! ip -net $nsr2 link set veth1 mtu $rmtu; then
 	exit 1
 fi
 
-ip -net ns2 link set eth0 mtu $rmtu
+ip -net $ns2 link set eth0 mtu $rmtu
 
 # transfer-net between nsr1 and nsr2.
 # these addresses are not used for connections.
-ip -net nsr1 addr add 192.168.10.1/24 dev veth1
-ip -net nsr1 addr add fee1:2::1/64 dev veth1
-
-ip -net nsr2 addr add 192.168.10.2/24 dev veth0
-ip -net nsr2 addr add fee1:2::2/64 dev veth0
-
-for i in 1 2; do
-  ip netns exec nsr$i sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
-  ip netns exec nsr$i sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
-
-  ip -net ns$i link set lo up
-  ip -net ns$i link set eth0 up
-  ip -net ns$i addr add 10.0.$i.99/24 dev eth0
-  ip -net ns$i route add default via 10.0.$i.1
-  ip -net ns$i addr add dead:$i::99/64 dev eth0
-  ip -net ns$i route add default via dead:$i::1
-  if ! ip netns exec ns$i sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null; then
+ip -net $nsr1 addr add 192.168.10.1/24 dev veth1
+ip -net $nsr1 addr add fee1:2::1/64 dev veth1
+
+ip -net $nsr2 addr add 192.168.10.2/24 dev veth0
+ip -net $nsr2 addr add fee1:2::2/64 dev veth0
+
+for i in 0 1; do
+  ip netns exec $nsr1 sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null
+  ip netns exec $nsr2 sysctl net.ipv4.conf.veth$i.forwarding=1 > /dev/null
+done
+
+for ns in $ns1 $ns2;do
+  ip -net $ns link set lo up
+  ip -net $ns link set eth0 up
+
+  if ! ip netns exec $ns sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null; then
 	echo "ERROR: Check Originator/Responder values (problem during address addition)"
 	exit 1
   fi
-
   # don't set ip DF bit for first two tests
-  ip netns exec ns$i sysctl net.ipv4.ip_no_pmtu_disc=1 > /dev/null
+  ip netns exec $ns sysctl net.ipv4.ip_no_pmtu_disc=1 > /dev/null
 done
 
-ip -net nsr1 route add default via 192.168.10.2
-ip -net nsr2 route add default via 192.168.10.1
+ip -net $ns1 addr add 10.0.1.99/24 dev eth0
+ip -net $ns2 addr add 10.0.2.99/24 dev eth0
+ip -net $ns1 route add default via 10.0.1.1
+ip -net $ns2 route add default via 10.0.2.1
+ip -net $ns1 addr add dead:1::99/64 dev eth0
+ip -net $ns2 addr add dead:2::99/64 dev eth0
+ip -net $ns1 route add default via dead:1::1
+ip -net $ns2 route add default via dead:2::1
+
+ip -net $nsr1 route add default via 192.168.10.2
+ip -net $nsr2 route add default via 192.168.10.1
 
-ip netns exec nsr1 nft -f - <<EOF
+ip netns exec $nsr1 nft -f - <<EOF
 table inet filter {
   flowtable f1 {
      hook ingress priority 0
      devices = { veth0, veth1 }
    }
 
+   counter routed_orig { }
+   counter routed_repl { }
+
    chain forward {
       type filter hook forward priority 0; policy drop;
 
       # flow offloaded? Tag ct with mark 1, so we can detect when it fails.
-      meta oif "veth1" tcp dport 12345 flow offload @f1 counter
-
-      # use packet size to trigger 'should be offloaded by now'.
-      # otherwise, if 'flow offload' expression never offloads, the
-      # test will pass.
-      tcp dport 12345 meta length gt 200 ct mark set 1 counter
+      meta oif "veth1" tcp dport 12345 ct mark set 1 flow add @f1 counter name routed_orig accept
 
-      # this turns off flow offloading internally, so expect packets again
-      tcp flags fin,rst ct mark set 0 accept
-
-      # this allows large packets from responder, we need this as long
-      # as PMTUd is off.
-      # This rule is deleted for the last test, when we expect PMTUd
-      # to kick in and ensure all packets meet mtu requirements.
-      meta length gt $lmtu accept comment something-to-grep-for
-
-      # next line blocks connection w.o. working offload.
-      # we only do this for reverse dir, because we expect packets to
-      # enter slow path due to MTU mismatch of veth0 and veth1.
-      tcp sport 12345 ct mark 1 counter log prefix "mark failure " drop
+      # count packets supposedly offloaded as per direction.
+      ct mark 1 counter name ct direction map { original : routed_orig, reply : routed_repl } accept
 
       ct state established,related accept
 
-      # for packets that we can't offload yet, i.e. SYN (any ct that is not confirmed)
-      meta length lt 200 oif "veth1" tcp dport 12345 counter accept
-
       meta nfproto ipv4 meta l4proto icmp accept
       meta nfproto ipv6 meta l4proto icmpv6 accept
    }
@@ -197,30 +189,30 @@ if [ $? -ne 0 ]; then
 fi
 
 # test basic connectivity
-if ! ip netns exec ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then
-  echo "ERROR: ns1 cannot reach ns2" 1>&2
+if ! ip netns exec $ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then
+  echo "ERROR: $ns1 cannot reach ns2" 1>&2
   exit 1
 fi
 
-if ! ip netns exec ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then
-  echo "ERROR: ns2 cannot reach ns1" 1>&2
+if ! ip netns exec $ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then
+  echo "ERROR: $ns2 cannot reach $ns1" 1>&2
   exit 1
 fi
 
 if [ $ret -eq 0 ];then
-	echo "PASS: netns routing/connectivity: ns1 can reach ns2"
+	echo "PASS: netns routing/connectivity: $ns1 can reach $ns2"
 fi
 
-ns1in=$(mktemp)
+nsin=$(mktemp)
 ns1out=$(mktemp)
-ns2in=$(mktemp)
 ns2out=$(mktemp)
 
 make_file()
 {
 	name=$1
 
-	SIZE=$((RANDOM % (1024 * 8)))
+	SIZE=$((RANDOM % (1024 * 128)))
+	SIZE=$((SIZE + (1024 * 8)))
 	TSIZE=$((SIZE * 1024))
 
 	dd if=/dev/urandom of="$name" bs=1024 count=$SIZE 2> /dev/null
@@ -231,6 +223,38 @@ make_file()
 	dd if=/dev/urandom conf=notrunc of="$name" bs=1 count=$SIZE 2> /dev/null
 }
 
+check_counters()
+{
+	local what=$1
+	local ok=1
+
+	local orig=$(ip netns exec $nsr1 nft reset counter inet filter routed_orig | grep packets)
+	local repl=$(ip netns exec $nsr1 nft reset counter inet filter routed_repl | grep packets)
+
+	local orig_cnt=${orig#*bytes}
+	local repl_cnt=${repl#*bytes}
+
+	local fs=$(du -sb $nsin)
+	local max_orig=${fs%%/*}
+	local max_repl=$((max_orig/4))
+
+	if [ $orig_cnt -gt $max_orig ];then
+		echo "FAIL: $what: original counter $orig_cnt exceeds expected value $max_orig" 1>&2
+		ret=1
+		ok=0
+	fi
+
+	if [ $repl_cnt -gt $max_repl ];then
+		echo "FAIL: $what: reply counter $repl_cnt exceeds expected value $max_repl" 1>&2
+		ret=1
+		ok=0
+	fi
+
+	if [ $ok -eq 1 ]; then
+		echo "PASS: $what"
+	fi
+}
+
 check_transfer()
 {
 	in=$1
@@ -255,11 +279,11 @@ test_tcp_forwarding_ip()
 	local dstport=$4
 	local lret=0
 
-	ip netns exec $nsb nc -w 5 -l -p 12345 < "$ns2in" > "$ns2out" &
+	ip netns exec $nsb nc -w 5 -l -p 12345 < "$nsin" > "$ns2out" &
 	lpid=$!
 
 	sleep 1
-	ip netns exec $nsa nc -w 4 "$dstip" "$dstport" < "$ns1in" > "$ns1out" &
+	ip netns exec $nsa nc -w 4 "$dstip" "$dstport" < "$nsin" > "$ns1out" &
 	cpid=$!
 
 	sleep 3
@@ -274,11 +298,11 @@ test_tcp_forwarding_ip()
 
 	wait
 
-	if ! check_transfer "$ns1in" "$ns2out" "ns1 -> ns2"; then
+	if ! check_transfer "$nsin" "$ns2out" "ns1 -> ns2"; then
 		lret=1
 	fi
 
-	if ! check_transfer "$ns2in" "$ns1out" "ns1 <- ns2"; then
+	if ! check_transfer "$nsin" "$ns1out" "ns1 <- ns2"; then
 		lret=1
 	fi
 
@@ -295,41 +319,59 @@ test_tcp_forwarding()
 test_tcp_forwarding_nat()
 {
 	local lret
+	local pmtu
 
 	test_tcp_forwarding_ip "$1" "$2" 10.0.2.99 12345
 	lret=$?
 
+	pmtu=$3
+	what=$4
+
 	if [ $lret -eq 0 ] ; then
+		if [ $pmtu -eq 1 ] ;then
+			check_counters "flow offload for ns1/ns2 with masquerade and pmtu discovery $what"
+		else
+			echo "PASS: flow offload for ns1/ns2 with masquerade $what"
+		fi
+
 		test_tcp_forwarding_ip "$1" "$2" 10.6.6.6 1666
 		lret=$?
+		if [ $pmtu -eq 1 ] ;then
+			check_counters "flow offload for ns1/ns2 with dnat and pmtu discovery $what"
+		elif [ $lret -eq 0 ] ; then
+			echo "PASS: flow offload for ns1/ns2 with dnat $what"
+		fi
 	fi
 
 	return $lret
 }
 
-make_file "$ns1in"
-make_file "$ns2in"
+make_file "$nsin"
 
 # First test:
 # No PMTU discovery, nsr1 is expected to fragment packets from ns1 to ns2 as needed.
-if test_tcp_forwarding ns1 ns2; then
+# Due to MTU mismatch in both directions, all packets (except small packets like pure
+# acks) have to be handled by normal forwarding path.  Therefore, packet counters
+# are not checked.
+if test_tcp_forwarding $ns1 $ns2; then
 	echo "PASS: flow offloaded for ns1/ns2"
 else
 	echo "FAIL: flow offload for ns1/ns2:" 1>&2
-	ip netns exec nsr1 nft list ruleset
+	ip netns exec $nsr1 nft list ruleset
 	ret=1
 fi
 
 # delete default route, i.e. ns2 won't be able to reach ns1 and
 # will depend on ns1 being masqueraded in nsr1.
 # expect ns1 has nsr1 address.
-ip -net ns2 route del default via 10.0.2.1
-ip -net ns2 route del default via dead:2::1
-ip -net ns2 route add 192.168.10.1 via 10.0.2.1
+ip -net $ns2 route del default via 10.0.2.1
+ip -net $ns2 route del default via dead:2::1
+ip -net $ns2 route add 192.168.10.1 via 10.0.2.1
 
 # Second test:
-# Same, but with NAT enabled.
-ip netns exec nsr1 nft -f - <<EOF
+# Same, but with NAT enabled.  Same as in first test: we expect normal forward path
+# to handle most packets.
+ip netns exec $nsr1 nft -f - <<EOF
 table ip nat {
    chain prerouting {
       type nat hook prerouting priority 0; policy accept;
@@ -343,47 +385,45 @@ table ip nat {
 }
 EOF
 
-if test_tcp_forwarding_nat ns1 ns2; then
-	echo "PASS: flow offloaded for ns1/ns2 with NAT"
-else
+if ! test_tcp_forwarding_nat $ns1 $ns2 0 ""; then
 	echo "FAIL: flow offload for ns1/ns2 with NAT" 1>&2
-	ip netns exec nsr1 nft list ruleset
+	ip netns exec $nsr1 nft list ruleset
 	ret=1
 fi
 
 # Third test:
-# Same as second test, but with PMTU discovery enabled.
-handle=$(ip netns exec nsr1 nft -a list table inet filter | grep something-to-grep-for | cut -d \# -f 2)
-
-if ! ip netns exec nsr1 nft delete rule inet filter forward $handle; then
-	echo "FAIL: Could not delete large-packet accept rule"
-	exit 1
-fi
-
-ip netns exec ns1 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
-ip netns exec ns2 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
-
-if test_tcp_forwarding_nat ns1 ns2; then
-	echo "PASS: flow offloaded for ns1/ns2 with NAT and pmtu discovery"
-else
+# Same as second test, but with PMTU discovery enabled. This
+# means that we expect the fastpath to handle packets as soon
+# as the endpoints adjust the packet size.
+ip netns exec $ns1 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
+ip netns exec $ns2 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
+
+# reset counters.
+# With pmtu in-place we'll also check that nft counters
+# are lower than file size and packets were forwarded via flowtable layer.
+# For earlier tests (large mtus), packets cannot be handled via flowtable
+# (except pure acks and other small packets).
+ip netns exec $nsr1 nft reset counters table inet filter >/dev/null
+
+if ! test_tcp_forwarding_nat $ns1 $ns2 1 ""; then
 	echo "FAIL: flow offload for ns1/ns2 with NAT and pmtu discovery" 1>&2
-	ip netns exec nsr1 nft list ruleset
+	ip netns exec $nsr1 nft list ruleset
 fi
 
 # Another test:
 # Add bridge interface br0 to Router1, with NAT enabled.
-ip -net nsr1 link add name br0 type bridge
-ip -net nsr1 addr flush dev veth0
-ip -net nsr1 link set up dev veth0
-ip -net nsr1 link set veth0 master br0
-ip -net nsr1 addr add 10.0.1.1/24 dev br0
-ip -net nsr1 addr add dead:1::1/64 dev br0
-ip -net nsr1 link set up dev br0
+ip -net $nsr1 link add name br0 type bridge
+ip -net $nsr1 addr flush dev veth0
+ip -net $nsr1 link set up dev veth0
+ip -net $nsr1 link set veth0 master br0
+ip -net $nsr1 addr add 10.0.1.1/24 dev br0
+ip -net $nsr1 addr add dead:1::1/64 dev br0
+ip -net $nsr1 link set up dev br0
 
-ip netns exec nsr1 sysctl net.ipv4.conf.br0.forwarding=1 > /dev/null
+ip netns exec $nsr1 sysctl net.ipv4.conf.br0.forwarding=1 > /dev/null
 
 # br0 with NAT enabled.
-ip netns exec nsr1 nft -f - <<EOF
+ip netns exec $nsr1 nft -f - <<EOF
 flush table ip nat
 table ip nat {
    chain prerouting {
@@ -398,59 +438,56 @@ table ip nat {
 }
 EOF
 
-if test_tcp_forwarding_nat ns1 ns2; then
-	echo "PASS: flow offloaded for ns1/ns2 with bridge NAT"
-else
+if ! test_tcp_forwarding_nat $ns1 $ns2 1 "on bridge"; then
 	echo "FAIL: flow offload for ns1/ns2 with bridge NAT" 1>&2
-	ip netns exec nsr1 nft list ruleset
+	ip netns exec $nsr1 nft list ruleset
 	ret=1
 fi
 
+
 # Another test:
 # Add bridge interface br0 to Router1, with NAT and VLAN.
-ip -net nsr1 link set veth0 nomaster
-ip -net nsr1 link set down dev veth0
-ip -net nsr1 link add link veth0 name veth0.10 type vlan id 10
-ip -net nsr1 link set up dev veth0
-ip -net nsr1 link set up dev veth0.10
-ip -net nsr1 link set veth0.10 master br0
-
-ip -net ns1 addr flush dev eth0
-ip -net ns1 link add link eth0 name eth0.10 type vlan id 10
-ip -net ns1 link set eth0 up
-ip -net ns1 link set eth0.10 up
-ip -net ns1 addr add 10.0.1.99/24 dev eth0.10
-ip -net ns1 route add default via 10.0.1.1
-ip -net ns1 addr add dead:1::99/64 dev eth0.10
-
-if test_tcp_forwarding_nat ns1 ns2; then
-	echo "PASS: flow offloaded for ns1/ns2 with bridge NAT and VLAN"
-else
+ip -net $nsr1 link set veth0 nomaster
+ip -net $nsr1 link set down dev veth0
+ip -net $nsr1 link add link veth0 name veth0.10 type vlan id 10
+ip -net $nsr1 link set up dev veth0
+ip -net $nsr1 link set up dev veth0.10
+ip -net $nsr1 link set veth0.10 master br0
+
+ip -net $ns1 addr flush dev eth0
+ip -net $ns1 link add link eth0 name eth0.10 type vlan id 10
+ip -net $ns1 link set eth0 up
+ip -net $ns1 link set eth0.10 up
+ip -net $ns1 addr add 10.0.1.99/24 dev eth0.10
+ip -net $ns1 route add default via 10.0.1.1
+ip -net $ns1 addr add dead:1::99/64 dev eth0.10
+
+if ! test_tcp_forwarding_nat $ns1 $ns2 1 "bridge and VLAN"; then
 	echo "FAIL: flow offload for ns1/ns2 with bridge NAT and VLAN" 1>&2
-	ip netns exec nsr1 nft list ruleset
+	ip netns exec $nsr1 nft list ruleset
 	ret=1
 fi
 
 # restore test topology (remove bridge and VLAN)
-ip -net nsr1 link set veth0 nomaster
-ip -net nsr1 link set veth0 down
-ip -net nsr1 link set veth0.10 down
-ip -net nsr1 link delete veth0.10 type vlan
-ip -net nsr1 link delete br0 type bridge
-ip -net ns1 addr flush dev eth0.10
-ip -net ns1 link set eth0.10 down
-ip -net ns1 link set eth0 down
-ip -net ns1 link delete eth0.10 type vlan
+ip -net $nsr1 link set veth0 nomaster
+ip -net $nsr1 link set veth0 down
+ip -net $nsr1 link set veth0.10 down
+ip -net $nsr1 link delete veth0.10 type vlan
+ip -net $nsr1 link delete br0 type bridge
+ip -net $ns1 addr flush dev eth0.10
+ip -net $ns1 link set eth0.10 down
+ip -net $ns1 link set eth0 down
+ip -net $ns1 link delete eth0.10 type vlan
 
 # restore address in ns1 and nsr1
-ip -net ns1 link set eth0 up
-ip -net ns1 addr add 10.0.1.99/24 dev eth0
-ip -net ns1 route add default via 10.0.1.1
-ip -net ns1 addr add dead:1::99/64 dev eth0
-ip -net ns1 route add default via dead:1::1
-ip -net nsr1 addr add 10.0.1.1/24 dev veth0
-ip -net nsr1 addr add dead:1::1/64 dev veth0
-ip -net nsr1 link set up dev veth0
+ip -net $ns1 link set eth0 up
+ip -net $ns1 addr add 10.0.1.99/24 dev eth0
+ip -net $ns1 route add default via 10.0.1.1
+ip -net $ns1 addr add dead:1::99/64 dev eth0
+ip -net $ns1 route add default via dead:1::1
+ip -net $nsr1 addr add 10.0.1.1/24 dev veth0
+ip -net $nsr1 addr add dead:1::1/64 dev veth0
+ip -net $nsr1 link set up dev veth0
 
 KEY_SHA="0x"$(ps -xaf | sha1sum | cut -d " " -f 1)
 KEY_AES="0x"$(ps -xaf | md5sum | cut -d " " -f 1)
@@ -480,23 +517,23 @@ do_esp() {
 
 }
 
-do_esp nsr1 192.168.10.1 192.168.10.2 10.0.1.0/24 10.0.2.0/24 $SPI1 $SPI2
+do_esp $nsr1 192.168.10.1 192.168.10.2 10.0.1.0/24 10.0.2.0/24 $SPI1 $SPI2
 
-do_esp nsr2 192.168.10.2 192.168.10.1 10.0.2.0/24 10.0.1.0/24 $SPI2 $SPI1
+do_esp $nsr2 192.168.10.2 192.168.10.1 10.0.2.0/24 10.0.1.0/24 $SPI2 $SPI1
 
-ip netns exec nsr1 nft delete table ip nat
+ip netns exec $nsr1 nft delete table ip nat
 
 # restore default routes
-ip -net ns2 route del 192.168.10.1 via 10.0.2.1
-ip -net ns2 route add default via 10.0.2.1
-ip -net ns2 route add default via dead:2::1
+ip -net $ns2 route del 192.168.10.1 via 10.0.2.1
+ip -net $ns2 route add default via 10.0.2.1
+ip -net $ns2 route add default via dead:2::1
 
-if test_tcp_forwarding ns1 ns2; then
-	echo "PASS: ipsec tunnel mode for ns1/ns2"
+if test_tcp_forwarding $ns1 $ns2; then
+	check_counters "ipsec tunnel mode for ns1/ns2"
 else
 	echo "FAIL: ipsec tunnel mode for ns1/ns2"
-	ip netns exec nsr1 nft list ruleset 1>&2
-	ip netns exec nsr1 cat /proc/net/xfrm_stat 1>&2
+	ip netns exec $nsr1 nft list ruleset 1>&2
+	ip netns exec $nsr1 cat /proc/net/xfrm_stat 1>&2
 fi
 
 exit $ret