From: Petr Machata <petrm@mellanox.com>
Date: Sat, 11 Jul 2020 00:55:15 +0300
Subject: selftests: mlxsw: RED: Test offload of mirror on RED early_drop
qevent
Patch-mainline: v5.9-rc1
Git-commit: 1add92121e39ee5e4af21562eb59bd562c8033e3
References: bsc#1176774
Add a selftest for offloading a mirror action attached to the block
associated with RED early_drop qevent.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh | 106 +++++++++++++-
tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh | 11 +
tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh | 8 +
3 files changed, 122 insertions(+), 3 deletions(-)
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
@@ -121,6 +121,7 @@ h1_destroy()
h2_create()
{
host_create $h2 2
+ tc qdisc add dev $h2 clsact
# Some of the tests in this suite use multicast traffic. As this traffic
# enters BR2_10 resp. BR2_11, it is flooded to all other ports. Thus
@@ -141,6 +142,7 @@ h2_create()
h2_destroy()
{
ethtool -s $h2 autoneg on
+ tc qdisc del dev $h2 clsact
host_destroy $h2
}
@@ -336,6 +338,17 @@ get_qdisc_npackets()
qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .packets
}
+send_packets()
+{
+ local vlan=$1; shift
+ local proto=$1; shift
+ local pkts=$1; shift
+
+ $MZ $h2.$vlan -p 8000 -a own -b $h3_mac \
+ -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \
+ -t $proto -q -c $pkts "$@"
+}
+
# This sends traffic in an attempt to build a backlog of $size. Returns 0 on
# success. After 10 failed attempts it bails out and returns 1. It dumps the
# backlog size to stdout.
@@ -364,9 +377,7 @@ build_backlog()
return 1
fi
- $MZ $h2.$vlan -p 8000 -a own -b $h3_mac \
- -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \
- -t $proto -q -c $pkts "$@"
+ send_packets $vlan $proto $pkts "$@"
done
}
@@ -531,3 +542,92 @@ do_mc_backlog_test()
log_test "TC $((vlan - 10)): Qdisc reports MC backlog"
}
+
+do_drop_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local trigger=$1; shift
+ local subtest=$1; shift
+ local fetch_counter=$1; shift
+ local backlog
+ local base
+ local now
+ local pct
+
+ RET=0
+
+ start_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) $h3_mac
+
+ # Create a bit of a backlog and observe no mirroring due to drops.
+ qevent_rule_install_$subtest
+ base=$($fetch_counter)
+
+ build_backlog $vlan $((2 * limit / 3)) udp >/dev/null
+
+ busywait 1100 until_counter_is ">= $((base + 1))" $fetch_counter >/dev/null
+ check_fail $? "Spurious packets observed without buffer pressure"
+
+ qevent_rule_uninstall_$subtest
+
+ # Push to the queue until it's at the limit. The configured limit is
+ # rounded by the qdisc and then by the driver, so this is the best we
+ # can do to get to the real limit of the system. Do this with the rules
+ # uninstalled so that the inevitable drops don't get counted.
+ build_backlog $vlan $((3 * limit / 2)) udp >/dev/null
+
+ qevent_rule_install_$subtest
+ base=$($fetch_counter)
+
+ send_packets $vlan udp 11
+
+ now=$(busywait 1100 until_counter_is ">= $((base + 10))" $fetch_counter)
+ check_err $? "Dropped packets not observed: 11 expected, $((now - base)) seen"
+
+ # When no extra traffic is injected, there should be no mirroring.
+ busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null
+ check_fail $? "Spurious packets observed"
+
+ # When the rule is uninstalled, there should be no mirroring.
+ qevent_rule_uninstall_$subtest
+ send_packets $vlan udp 11
+ busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null
+ check_fail $? "Spurious packets observed after uninstall"
+
+ log_test "TC $((vlan - 10)): ${trigger}ped packets $subtest'd"
+
+ stop_traffic
+ sleep 1
+}
+
+qevent_rule_install_mirror()
+{
+ tc filter add block 10 pref 1234 handle 102 matchall skip_sw \
+ action mirred egress mirror dev $swp2 hw_stats disabled
+}
+
+qevent_rule_uninstall_mirror()
+{
+ tc filter del block 10 pref 1234 handle 102 matchall
+}
+
+qevent_counter_fetch_mirror()
+{
+ tc_rule_handle_stats_get "dev $h2 ingress" 101
+}
+
+do_drop_mirror_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local qevent_name=$1; shift
+
+ tc filter add dev $h2 ingress pref 1 handle 101 prot ip \
+ flower skip_sw ip_proto udp \
+ action drop
+
+ do_drop_test "$vlan" "$limit" "$qevent_name" mirror \
+ qevent_counter_fetch_mirror
+
+ tc filter del dev $h2 ingress pref 1 handle 101 flower
+}
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
@@ -7,6 +7,7 @@ ALL_TESTS="
ecn_nodrop_test
red_test
mc_backlog_test
+ red_mirror_test
"
: ${QDISC:=ets}
source sch_red_core.sh
@@ -82,6 +83,16 @@ mc_backlog_test()
uninstall_qdisc
}
+
+red_mirror_test()
+{
+ install_qdisc qevent early_drop block 10
+
+ do_drop_mirror_test 10 $BACKLOG1 early_drop
+ do_drop_mirror_test 11 $BACKLOG2 early_drop
+
+ uninstall_qdisc
+}
trap cleanup EXIT
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
@@ -7,6 +7,7 @@ ALL_TESTS="
ecn_nodrop_test
red_test
mc_backlog_test
+ red_mirror_test
"
source sch_red_core.sh
@@ -57,6 +58,13 @@ mc_backlog_test()
uninstall_qdisc
}
+red_mirror_test()
+{
+ install_qdisc qevent early_drop block 10
+ do_drop_mirror_test 10 $BACKLOG
+ uninstall_qdisc
+}
+
trap cleanup EXIT
setup_prepare