selftests: mlxsw: RED: Add selftests for the mark qevent

Add do_mark_test(), which is to do_ecn_test() like do_drop_test() is to
do_red_test(): meant to test that actions on the RED mark qevent block are
offloaded, and executed on ECN-marked packets.

The test splits install_qdisc() into its constituents, install_root_qdisc()
and install_qdisc_tcX(). This is in order to test that when mirroring is
enabled on one TC, the other TC does not mirror.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
index 88053f8..eea3e5a 100644 (file)
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
@@ -544,6 +544,53 @@ do_mc_backlog_test()
        log_test "TC $((vlan - 10)): Qdisc reports MC backlog"
 }
 
+do_mark_test()
+{
+       local vlan=$1; shift
+       local limit=$1; shift
+       local subtest=$1; shift
+       local fetch_counter=$1; shift
+       local should_fail=$1; shift
+       local base
+
+       RET=0
+
+       start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
+                         $h3_mac tos=0x01
+
+       # Create a bit of a backlog and observe no mirroring due to marks.
+       qevent_rule_install_$subtest
+
+       build_backlog $vlan $((2 * limit / 3)) tcp tos=0x01 >/dev/null
+
+       base=$($fetch_counter)
+       count=$(busywait 1100 until_counter_is ">= $((base + 1))" \
+               $fetch_counter)
+       check_fail $? "Spurious packets ($base -> $count) observed without buffer pressure"
+
+       # Above limit, everything should be mirrored, we should see lots of
+       # packets.
+       build_backlog $vlan $((3 * limit / 2)) tcp tos=0x01 >/dev/null
+       busywait_for_counter 1100 +10000 \
+                $fetch_counter > /dev/null
+       check_err_fail "$should_fail" $? "ECN-marked packets $subtest'd"
+
+       # When the rule is uninstalled, there should be no mirroring.
+       qevent_rule_uninstall_$subtest
+       busywait_for_counter 1100 +10 \
+                $fetch_counter > /dev/null
+       check_fail $? "Spurious packets observed after uninstall"
+
+       if ((should_fail)); then
+               log_test "TC $((vlan - 10)): marked packets not $subtest'd"
+       else
+               log_test "TC $((vlan - 10)): marked packets $subtest'd"
+       fi
+
+       stop_traffic
+       sleep 1
+}
+
 do_drop_test()
 {
        local vlan=$1; shift
@@ -626,6 +673,22 @@ do_drop_mirror_test()
        tc filter del dev $h2 ingress pref 1 handle 101 flower
 }
 
+do_mark_mirror_test()
+{
+       local vlan=$1; shift
+       local limit=$1; shift
+
+       tc filter add dev $h2 ingress pref 1 handle 101 prot ip \
+          flower skip_sw ip_proto tcp \
+          action drop
+
+       do_mark_test "$vlan" "$limit" mirror \
+                    qevent_counter_fetch_mirror \
+                    $(: should_fail=)0
+
+       tc filter del dev $h2 ingress pref 1 handle 101 flower
+}
+
 qevent_rule_install_trap()
 {
        tc filter add block 10 pref 1234 handle 102 matchall skip_sw \
@@ -653,3 +716,14 @@ do_drop_trap_test()
        do_drop_test "$vlan" "$limit" "$trap_name" trap \
                     "qevent_counter_fetch_trap $trap_name"
 }
+
+qevent_rule_install_trap_fwd()
+{
+       tc filter add block 10 pref 1234 handle 102 matchall skip_sw \
+          action trap_fwd hw_stats disabled
+}
+
+qevent_rule_uninstall_trap_fwd()
+{
+       tc filter del block 10 pref 1234 handle 102 matchall
+}

diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
index f3ef327..b58b4cf 100755 (executable)
--- a/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
@@ -9,6 +9,7 @@ ALL_TESTS="
        mc_backlog_test
        red_mirror_test
        red_trap_test
+       ecn_mirror_test
 "
 : ${QDISC:=ets}
 source sch_red_core.sh
@@ -21,28 +22,60 @@ source sch_red_core.sh
 BACKLOG1=200000
 BACKLOG2=500000
 
-install_qdisc()
+install_root_qdisc()
 {
-       local -a args=("$@")
-
        tc qdisc add dev $swp3 root handle 10: $QDISC \
           bands 8 priomap 7 6 5 4 3 2 1 0
+}
+
+install_qdisc_tc0()
+{
+       local -a args=("$@")
+
        tc qdisc add dev $swp3 parent 10:8 handle 108: red \
           limit 1000000 min $BACKLOG1 max $((BACKLOG1 + 1)) \
           probability 1.0 avpkt 8000 burst 38 "${args[@]}"
+}
+
+install_qdisc_tc1()
+{
+       local -a args=("$@")
+
        tc qdisc add dev $swp3 parent 10:7 handle 107: red \
           limit 1000000 min $BACKLOG2 max $((BACKLOG2 + 1)) \
           probability 1.0 avpkt 8000 burst 63 "${args[@]}"
+}
+
+install_qdisc()
+{
+       install_root_qdisc
+       install_qdisc_tc0 "$@"
+       install_qdisc_tc1 "$@"
        sleep 1
 }
 
-uninstall_qdisc()
+uninstall_qdisc_tc0()
 {
-       tc qdisc del dev $swp3 parent 10:7
        tc qdisc del dev $swp3 parent 10:8
+}
+
+uninstall_qdisc_tc1()
+{
+       tc qdisc del dev $swp3 parent 10:7
+}
+
+uninstall_root_qdisc()
+{
        tc qdisc del dev $swp3 root
 }
 
+uninstall_qdisc()
+{
+       uninstall_qdisc_tc0
+       uninstall_qdisc_tc1
+       uninstall_root_qdisc
+}
+
 ecn_test()
 {
        install_qdisc ecn
@@ -112,6 +145,16 @@ red_trap_test()
        uninstall_qdisc
 }
 
+ecn_mirror_test()
+{
+       install_qdisc ecn qevent mark block 10
+
+       do_mark_mirror_test 10 $BACKLOG1
+       do_mark_mirror_test 11 $BACKLOG2
+
+       uninstall_qdisc
+}
+
 trap cleanup EXIT
 
 setup_prepare