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Date: Thu, 24 Feb 2022 15:33:35 +0200
From: Ido Schimmel <idosch@...dia.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, petrm@...dia.com,
jiri@...dia.com, razor@...ckwall.org, roopa@...dia.com,
dsahern@...il.com, andrew@...n.ch, mlxsw@...dia.com,
Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 14/14] selftests: forwarding: hw_stats_l3: Add a new test
From: Petr Machata <petrm@...dia.com>
Add a test that verifies operation of L3 HW statistics.
Signed-off-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
.../selftests/net/forwarding/hw_stats_l3.sh | 332 ++++++++++++++++++
1 file changed, 332 insertions(+)
create mode 100755 tools/testing/selftests/net/forwarding/hw_stats_l3.sh
diff --git a/tools/testing/selftests/net/forwarding/hw_stats_l3.sh b/tools/testing/selftests/net/forwarding/hw_stats_l3.sh
new file mode 100755
index 000000000000..1c11c4256d06
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/hw_stats_l3.sh
@@ -0,0 +1,332 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# +--------------------+ +----------------------+
+# | H1 | | H2 |
+# | | | |
+# | $h1.200 + | | + $h2.200 |
+# | 192.0.2.1/28 | | | | 192.0.2.18/28 |
+# | 2001:db8:1::1/64 | | | | 2001:db8:2::1/64 |
+# | | | | | |
+# | $h1 + | | + $h2 |
+# | | | | | |
+# +------------------|-+ +-|--------------------+
+# | |
+# +------------------|-------------------------|--------------------+
+# | SW | | |
+# | | | |
+# | $rp1 + + $rp2 |
+# | | | |
+# | $rp1.200 + + $rp2.200 |
+# | 192.0.2.2/28 192.0.2.17/28 |
+# | 2001:db8:1::2/64 2001:db8:2::2/64 |
+# | |
+# +-----------------------------------------------------------------+
+
+ALL_TESTS="
+ ping_ipv4
+ ping_ipv6
+ test_stats_rx_ipv4
+ test_stats_tx_ipv4
+ test_stats_rx_ipv6
+ test_stats_tx_ipv6
+ respin_enablement
+ test_stats_rx_ipv4
+ test_stats_tx_ipv4
+ test_stats_rx_ipv6
+ test_stats_tx_ipv6
+ reapply_config
+ ping_ipv4
+ ping_ipv6
+ test_stats_rx_ipv4
+ test_stats_tx_ipv4
+ test_stats_rx_ipv6
+ test_stats_tx_ipv6
+ test_stats_report_rx
+ test_stats_report_tx
+ test_destroy_enabled
+ test_double_enable
+"
+NUM_NETIFS=4
+source lib.sh
+
+h1_create()
+{
+ simple_if_init $h1
+ vlan_create $h1 200 v$h1 192.0.2.1/28 2001:db8:1::1/64
+ ip route add 192.0.2.16/28 vrf v$h1 nexthop via 192.0.2.2
+ ip -6 route add 2001:db8:2::/64 vrf v$h1 nexthop via 2001:db8:1::2
+}
+
+h1_destroy()
+{
+ ip -6 route del 2001:db8:2::/64 vrf v$h1 nexthop via 2001:db8:1::2
+ ip route del 192.0.2.16/28 vrf v$h1 nexthop via 192.0.2.2
+ vlan_destroy $h1 200
+ simple_if_fini $h1
+}
+
+h2_create()
+{
+ simple_if_init $h2
+ vlan_create $h2 200 v$h2 192.0.2.18/28 2001:db8:2::1/64
+ ip route add 192.0.2.0/28 vrf v$h2 nexthop via 192.0.2.17
+ ip -6 route add 2001:db8:1::/64 vrf v$h2 nexthop via 2001:db8:2::2
+}
+
+h2_destroy()
+{
+ ip -6 route del 2001:db8:1::/64 vrf v$h2 nexthop via 2001:db8:2::2
+ ip route del 192.0.2.0/28 vrf v$h2 nexthop via 192.0.2.17
+ vlan_destroy $h2 200
+ simple_if_fini $h2
+}
+
+router_rp1_200_create()
+{
+ ip link add name $rp1.200 up \
+ link $rp1 addrgenmode eui64 type vlan id 200
+ ip address add dev $rp1.200 192.0.2.2/28
+ ip address add dev $rp1.200 2001:db8:1::2/64
+ ip stats set dev $rp1.200 l3_stats on
+}
+
+router_rp1_200_destroy()
+{
+ ip stats set dev $rp1.200 l3_stats off
+ ip address del dev $rp1.200 2001:db8:1::2/64
+ ip address del dev $rp1.200 192.0.2.2/28
+ ip link del dev $rp1.200
+}
+
+router_create()
+{
+ ip link set dev $rp1 up
+ router_rp1_200_create
+
+ ip link set dev $rp2 up
+ vlan_create $rp2 200 "" 192.0.2.17/28 2001:db8:2::2/64
+}
+
+router_destroy()
+{
+ vlan_destroy $rp2 200
+ ip link set dev $rp2 down
+
+ router_rp1_200_destroy
+ ip link set dev $rp1 down
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ rp1=${NETIFS[p2]}
+
+ rp2=${NETIFS[p3]}
+ h2=${NETIFS[p4]}
+
+ rp1mac=$(mac_get $rp1)
+ rp2mac=$(mac_get $rp2)
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+
+ router_create
+
+ forwarding_enable
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ forwarding_restore
+
+ router_destroy
+
+ h2_destroy
+ h1_destroy
+
+ vrf_cleanup
+}
+
+ping_ipv4()
+{
+ ping_test $h1.200 192.0.2.18 " IPv4"
+}
+
+ping_ipv6()
+{
+ ping_test $h1.200 2001:db8:2::1 " IPv6"
+}
+
+get_l3_stat()
+{
+ local selector=$1; shift
+
+ ip -j stats show dev $rp1.200 group offload subgroup l3_stats |
+ jq '.[0].stats64.'$selector
+}
+
+send_packets_rx_ipv4()
+{
+ # Send 21 packets instead of 20, because the first one might trap and go
+ # through the SW datapath, which might not bump the HW counter.
+ $MZ $h1.200 -c 21 -d 20msec -p 100 \
+ -a own -b $rp1mac -A 192.0.2.1 -B 192.0.2.18 \
+ -q -t udp sp=54321,dp=12345
+}
+
+send_packets_rx_ipv6()
+{
+ $MZ $h1.200 -6 -c 21 -d 20msec -p 100 \
+ -a own -b $rp1mac -A 2001:db8:1::1 -B 2001:db8:2::1 \
+ -q -t udp sp=54321,dp=12345
+}
+
+send_packets_tx_ipv4()
+{
+ $MZ $h2.200 -c 21 -d 20msec -p 100 \
+ -a own -b $rp2mac -A 192.0.2.18 -B 192.0.2.1 \
+ -q -t udp sp=54321,dp=12345
+}
+
+send_packets_tx_ipv6()
+{
+ $MZ $h2.200 -6 -c 21 -d 20msec -p 100 \
+ -a own -b $rp2mac -A 2001:db8:2::1 -B 2001:db8:1::1 \
+ -q -t udp sp=54321,dp=12345
+}
+
+___test_stats()
+{
+ local dir=$1; shift
+ local prot=$1; shift
+
+ local a
+ local b
+
+ a=$(get_l3_stat ${dir}.packets)
+ send_packets_${dir}_${prot}
+ "$@"
+ b=$(busywait "$TC_HIT_TIMEOUT" until_counter_is ">= $a + 20" \
+ get_l3_stat ${dir}.packets)
+ check_err $? "Traffic not reflected in the counter: $a -> $b"
+}
+
+__test_stats()
+{
+ local dir=$1; shift
+ local prot=$1; shift
+
+ RET=0
+ ___test_stats "$dir" "$prot"
+ log_test "Test $dir packets: $prot"
+}
+
+test_stats_rx_ipv4()
+{
+ __test_stats rx ipv4
+}
+
+test_stats_tx_ipv4()
+{
+ __test_stats tx ipv4
+}
+
+test_stats_rx_ipv6()
+{
+ __test_stats rx ipv6
+}
+
+test_stats_tx_ipv6()
+{
+ __test_stats tx ipv6
+}
+
+# Make sure everything works well even after stats have been disabled and
+# reenabled on the same device without touching the L3 configuration.
+respin_enablement()
+{
+ log_info "Turning stats off and on again"
+ ip stats set dev $rp1.200 l3_stats off
+ ip stats set dev $rp1.200 l3_stats on
+}
+
+# For the initial run, l3_stats is enabled on a completely set up netdevice. Now
+# do it the other way around: enabling the L3 stats on an L2 netdevice, and only
+# then apply the L3 configuration.
+reapply_config()
+{
+ log_info "Reapplying configuration"
+
+ router_rp1_200_destroy
+
+ ip link add name $rp1.200 link $rp1 addrgenmode none type vlan id 200
+ ip stats set dev $rp1.200 l3_stats on
+ ip link set dev $rp1.200 up addrgenmode eui64
+ ip address add dev $rp1.200 192.0.2.2/28
+ ip address add dev $rp1.200 2001:db8:1::2/64
+}
+
+__test_stats_report()
+{
+ local dir=$1; shift
+ local prot=$1; shift
+
+ local a
+ local b
+
+ RET=0
+
+ a=$(get_l3_stat ${dir}.packets)
+ send_packets_${dir}_${prot}
+ ip address flush dev $rp1.200
+ b=$(busywait "$TC_HIT_TIMEOUT" until_counter_is ">= $a + 20" \
+ get_l3_stat ${dir}.packets)
+ check_err $? "Traffic not reflected in the counter: $a -> $b"
+ log_test "Test ${dir} packets: stats pushed on loss of L3"
+
+ ip stats set dev $rp1.200 l3_stats off
+ ip link del dev $rp1.200
+ router_rp1_200_create
+}
+
+test_stats_report_rx()
+{
+ __test_stats_report rx ipv4
+}
+
+test_stats_report_tx()
+{
+ __test_stats_report tx ipv4
+}
+
+test_destroy_enabled()
+{
+ RET=0
+
+ ip link del dev $rp1.200
+ router_rp1_200_create
+
+ log_test "Destroy l3_stats-enabled netdev"
+}
+
+test_double_enable()
+{
+ RET=0
+ ___test_stats rx ipv4 \
+ ip stats set dev $rp1.200 l3_stats on
+ log_test "Test stat retention across a spurious enablement"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
--
2.33.1
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