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-rw-r--r--tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh533
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diff --git a/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
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index 000000000000..0d347d48c112
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+++ b/tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
@@ -0,0 +1,533 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# This test sends a >1Gbps stream of traffic from H1, to the switch, which
+# forwards it to a 1Gbps port. This 1Gbps stream is then looped back to the
+# switch and forwarded to the port under test $swp3, which is also 1Gbps.
+#
+# This way, $swp3 should be 100% filled with traffic without any of it spilling
+# to the backlog. Any extra packets sent should almost 1:1 go to backlog. That
+# is what H2 is used for--it sends the extra traffic to create backlog.
+#
+# A RED Qdisc is installed on $swp3. The configuration is such that the minimum
+# and maximum size are 1 byte apart, so there is a very clear border under which
+# no marking or dropping takes place, and above which everything is marked or
+# dropped.
+#
+# The test uses the buffer build-up behavior to test the installed RED.
+#
+# In order to test WRED, $swp3 actually contains RED under PRIO, with two
+# different configurations. Traffic is prioritized using 802.1p and relies on
+# the implicit mlxsw configuration, where packet priority is taken 1:1 from the
+# 802.1p marking.
+#
+# +--------------------------+ +--------------------------+
+# | H1 | | H2 |
+# | + $h1.10 | | + $h2.10 |
+# | | 192.0.2.1/28 | | | 192.0.2.2/28 |
+# | | | | | |
+# | | $h1.11 + | | | $h2.11 + |
+# | | 192.0.2.17/28 | | | | 192.0.2.18/28 | |
+# | | | | | | | |
+# | \______ ______/ | | \______ ______/ |
+# | \ / | | \ / |
+# | + $h1 | | + $h2 |
+# +-------------|------------+ +-------------|------------+
+# | >1Gbps |
+# +-------------|------------------------------------------------|------------+
+# | SW + $swp1 + $swp2 |
+# | _______/ \___________ ___________/ \_______ |
+# | / \ / \ |
+# | +-|-----------------+ | +-|-----------------+ | |
+# | | + $swp1.10 | | | + $swp2.10 | | |
+# | | | | .-------------+ $swp5.10 | | |
+# | | BR1_10 | | | | | | |
+# | | | | | | BR2_10 | | |
+# | | + $swp2.10 | | | | | | |
+# | +-|-----------------+ | | | + $swp3.10 | | |
+# | | | | +-|-----------------+ | |
+# | | +-----------------|-+ | | +-----------------|-+ |
+# | | | $swp1.11 + | | | | $swp2.11 + | |
+# | | | | | .-----------------+ $swp5.11 | |
+# | | | BR1_11 | | | | | | |
+# | | | | | | | | BR2_11 | |
+# | | | $swp2.11 + | | | | | | |
+# | | +-----------------|-+ | | | | $swp3.11 + | |
+# | | | | | | +-----------------|-+ |
+# | \_______ ___________/ | | \___________ _______/ |
+# | \ / \ / \ / |
+# | + $swp4 + $swp5 + $swp3 |
+# +-------------|----------------------|-------------------------|------------+
+# | | | 1Gbps
+# \________1Gbps_________/ |
+# +----------------------------|------------+
+# | H3 + $h3 |
+# | _____________________/ \_______ |
+# | / \ |
+# | | | |
+# | + $h3.10 $h3.11 + |
+# | 192.0.2.3/28 192.0.2.19/28 |
+# +-----------------------------------------+
+
+NUM_NETIFS=8
+CHECK_TC="yes"
+lib_dir=$(dirname $0)/../../../net/forwarding
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+source qos_lib.sh
+
+ipaddr()
+{
+ local host=$1; shift
+ local vlan=$1; shift
+
+ echo 192.0.2.$((16 * (vlan - 10) + host))
+}
+
+host_create()
+{
+ local dev=$1; shift
+ local host=$1; shift
+
+ simple_if_init $dev
+ mtu_set $dev 10000
+
+ vlan_create $dev 10 v$dev $(ipaddr $host 10)/28
+ ip link set dev $dev.10 type vlan egress 0:0
+
+ vlan_create $dev 11 v$dev $(ipaddr $host 11)/28
+ ip link set dev $dev.11 type vlan egress 0:1
+}
+
+host_destroy()
+{
+ local dev=$1; shift
+
+ vlan_destroy $dev 11
+ vlan_destroy $dev 10
+ mtu_restore $dev
+ simple_if_fini $dev
+}
+
+h1_create()
+{
+ host_create $h1 1
+}
+
+h1_destroy()
+{
+ host_destroy $h1
+}
+
+h2_create()
+{
+ host_create $h2 2
+
+ # 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
+ # e.g. traffic ingressing through $swp2 is flooded to $swp3 (the
+ # intended destination) and $swp5 (which is intended as ingress for
+ # another stream of traffic).
+ #
+ # This is generally not a problem, but if the $swp5 throughput is lower
+ # than $swp2 throughput, there will be a build-up at $swp5. That may
+ # cause packets to fail to queue up at $swp3 due to shared buffer
+ # quotas, and the test to spuriously fail.
+ #
+ # Prevent this by setting the speed of $h2 to 1Gbps.
+
+ ethtool -s $h2 speed 1000 autoneg off
+}
+
+h2_destroy()
+{
+ ethtool -s $h2 autoneg on
+ host_destroy $h2
+}
+
+h3_create()
+{
+ host_create $h3 3
+ ethtool -s $h3 speed 1000 autoneg off
+}
+
+h3_destroy()
+{
+ ethtool -s $h3 autoneg on
+ host_destroy $h3
+}
+
+switch_create()
+{
+ local intf
+ local vlan
+
+ ip link add dev br1_10 type bridge
+ ip link add dev br1_11 type bridge
+
+ ip link add dev br2_10 type bridge
+ ip link add dev br2_11 type bridge
+
+ for intf in $swp1 $swp2 $swp3 $swp4 $swp5; do
+ ip link set dev $intf up
+ mtu_set $intf 10000
+ done
+
+ for intf in $swp1 $swp4; do
+ for vlan in 10 11; do
+ vlan_create $intf $vlan
+ ip link set dev $intf.$vlan master br1_$vlan
+ ip link set dev $intf.$vlan up
+ done
+ done
+
+ for intf in $swp2 $swp3 $swp5; do
+ for vlan in 10 11; do
+ vlan_create $intf $vlan
+ ip link set dev $intf.$vlan master br2_$vlan
+ ip link set dev $intf.$vlan up
+ done
+ done
+
+ ip link set dev $swp4.10 type vlan egress 0:0
+ ip link set dev $swp4.11 type vlan egress 0:1
+ for intf in $swp1 $swp2 $swp5; do
+ for vlan in 10 11; do
+ ip link set dev $intf.$vlan type vlan ingress 0:0 1:1
+ done
+ done
+
+ for intf in $swp2 $swp3 $swp4 $swp5; do
+ ethtool -s $intf speed 1000 autoneg off
+ done
+
+ ip link set dev br1_10 up
+ ip link set dev br1_11 up
+ ip link set dev br2_10 up
+ ip link set dev br2_11 up
+
+ local size=$(devlink_pool_size_thtype 0 | cut -d' ' -f 1)
+ devlink_port_pool_th_set $swp3 8 $size
+}
+
+switch_destroy()
+{
+ local intf
+ local vlan
+
+ devlink_port_pool_th_restore $swp3 8
+
+ tc qdisc del dev $swp3 root 2>/dev/null
+
+ ip link set dev br2_11 down
+ ip link set dev br2_10 down
+ ip link set dev br1_11 down
+ ip link set dev br1_10 down
+
+ for intf in $swp5 $swp4 $swp3 $swp2; do
+ ethtool -s $intf autoneg on
+ done
+
+ for intf in $swp5 $swp3 $swp2 $swp4 $swp1; do
+ for vlan in 11 10; do
+ ip link set dev $intf.$vlan down
+ ip link set dev $intf.$vlan nomaster
+ vlan_destroy $intf $vlan
+ done
+
+ mtu_restore $intf
+ ip link set dev $intf down
+ done
+
+ ip link del dev br2_11
+ ip link del dev br2_10
+ ip link del dev br1_11
+ ip link del dev br1_10
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ swp1=${NETIFS[p2]}
+
+ swp2=${NETIFS[p3]}
+ h2=${NETIFS[p4]}
+
+ swp3=${NETIFS[p5]}
+ h3=${NETIFS[p6]}
+
+ swp4=${NETIFS[p7]}
+ swp5=${NETIFS[p8]}
+
+ h3_mac=$(mac_get $h3)
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+ h3_create
+ switch_create
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ switch_destroy
+ h3_destroy
+ h2_destroy
+ h1_destroy
+
+ vrf_cleanup
+}
+
+ping_ipv4()
+{
+ ping_test $h1.10 $(ipaddr 3 10) " from host 1, vlan 10"
+ ping_test $h1.11 $(ipaddr 3 11) " from host 1, vlan 11"
+ ping_test $h2.10 $(ipaddr 3 10) " from host 2, vlan 10"
+ ping_test $h2.11 $(ipaddr 3 11) " from host 2, vlan 11"
+}
+
+get_tc()
+{
+ local vlan=$1; shift
+
+ echo $((vlan - 10))
+}
+
+get_qdisc_handle()
+{
+ local vlan=$1; shift
+
+ local tc=$(get_tc $vlan)
+ local band=$((8 - tc))
+
+ # Handle is 107: for TC1, 108: for TC0.
+ echo "10$band:"
+}
+
+get_qdisc_backlog()
+{
+ local vlan=$1; shift
+
+ qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .backlog
+}
+
+get_mc_transmit_queue()
+{
+ local vlan=$1; shift
+
+ local tc=$(($(get_tc $vlan) + 8))
+ ethtool_stats_get $swp3 tc_transmit_queue_tc_$tc
+}
+
+get_nmarked()
+{
+ local vlan=$1; shift
+
+ ethtool_stats_get $swp3 ecn_marked
+}
+
+get_qdisc_npackets()
+{
+ local vlan=$1; shift
+
+ busywait_for_counter 1100 +1 \
+ qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .packets
+}
+
+# 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.
+build_backlog()
+{
+ local vlan=$1; shift
+ local size=$1; shift
+ local proto=$1; shift
+
+ local tc=$((vlan - 10))
+ local band=$((8 - tc))
+ local cur=-1
+ local i=0
+
+ while :; do
+ local cur=$(busywait 1100 until_counter_is "> $cur" \
+ get_qdisc_backlog $vlan)
+ local diff=$((size - cur))
+ local pkts=$(((diff + 7999) / 8000))
+
+ if ((cur >= size)); then
+ echo $cur
+ return 0
+ elif ((i++ > 10)); then
+ echo $cur
+ 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 $pkts "$@"
+ done
+}
+
+check_marking()
+{
+ local vlan=$1; shift
+ local cond=$1; shift
+
+ local npackets_0=$(get_qdisc_npackets $vlan)
+ local nmarked_0=$(get_nmarked $vlan)
+ sleep 5
+ local npackets_1=$(get_qdisc_npackets $vlan)
+ local nmarked_1=$(get_nmarked $vlan)
+
+ local nmarked_d=$((nmarked_1 - nmarked_0))
+ local npackets_d=$((npackets_1 - npackets_0))
+ local pct=$((100 * nmarked_d / npackets_d))
+
+ echo $pct
+ ((pct $cond))
+}
+
+ecn_test_common()
+{
+ local name=$1; shift
+ local vlan=$1; shift
+ local limit=$1; shift
+ local backlog
+ local pct
+
+ # Build the below-the-limit backlog using UDP. We could use TCP just
+ # fine, but this way we get a proof that UDP is accepted when queue
+ # length is below the limit. The main stream is using TCP, and if the
+ # limit is misconfigured, we would see this traffic being ECN marked.
+ RET=0
+ backlog=$(build_backlog $vlan $((2 * limit / 3)) udp)
+ check_err $? "Could not build the requested backlog"
+ pct=$(check_marking $vlan "== 0")
+ check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
+ log_test "TC $((vlan - 10)): $name backlog < limit"
+
+ # Now push TCP, because non-TCP traffic would be early-dropped after the
+ # backlog crosses the limit, and we want to make sure that the backlog
+ # is above the limit.
+ RET=0
+ backlog=$(build_backlog $vlan $((3 * limit / 2)) tcp tos=0x01)
+ check_err $? "Could not build the requested backlog"
+ pct=$(check_marking $vlan ">= 95")
+ check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected >= 95."
+ log_test "TC $((vlan - 10)): $name backlog > limit"
+}
+
+do_ecn_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local name=ECN
+
+ start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
+ $h3_mac tos=0x01
+ sleep 1
+
+ ecn_test_common "$name" $vlan $limit
+
+ # Up there we saw that UDP gets accepted when backlog is below the
+ # limit. Now that it is above, it should all get dropped, and backlog
+ # building should fail.
+ RET=0
+ build_backlog $vlan $((2 * limit)) udp >/dev/null
+ check_fail $? "UDP traffic went into backlog instead of being early-dropped"
+ log_test "TC $((vlan - 10)): $name backlog > limit: UDP early-dropped"
+
+ stop_traffic
+ sleep 1
+}
+
+do_ecn_nodrop_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local name="ECN nodrop"
+
+ start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
+ $h3_mac tos=0x01
+ sleep 1
+
+ ecn_test_common "$name" $vlan $limit
+
+ # Up there we saw that UDP gets accepted when backlog is below the
+ # limit. Now that it is above, in nodrop mode, make sure it goes to
+ # backlog as well.
+ RET=0
+ build_backlog $vlan $((2 * limit)) udp >/dev/null
+ check_err $? "UDP traffic was early-dropped instead of getting into backlog"
+ log_test "TC $((vlan - 10)): $name backlog > limit: UDP not dropped"
+
+ stop_traffic
+ sleep 1
+}
+
+do_red_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local backlog
+ local pct
+
+ # Use ECN-capable TCP to verify there's no marking even though the queue
+ # is above limit.
+ start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
+ $h3_mac tos=0x01
+
+ # Pushing below the queue limit should work.
+ RET=0
+ backlog=$(build_backlog $vlan $((2 * limit / 3)) tcp tos=0x01)
+ check_err $? "Could not build the requested backlog"
+ pct=$(check_marking $vlan "== 0")
+ check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
+ log_test "TC $((vlan - 10)): RED backlog < limit"
+
+ # Pushing above should not.
+ RET=0
+ backlog=$(build_backlog $vlan $((3 * limit / 2)) tcp tos=0x01)
+ check_fail $? "Traffic went into backlog instead of being early-dropped"
+ pct=$(check_marking $vlan "== 0")
+ check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
+ local diff=$((limit - backlog))
+ pct=$((100 * diff / limit))
+ ((0 <= pct && pct <= 5))
+ check_err $? "backlog $backlog / $limit expected <= 5% distance"
+ log_test "TC $((vlan - 10)): RED backlog > limit"
+
+ stop_traffic
+ sleep 1
+}
+
+do_mc_backlog_test()
+{
+ local vlan=$1; shift
+ local limit=$1; shift
+ local backlog
+ local pct
+
+ RET=0
+
+ start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) bc
+ start_tcp_traffic $h2.$vlan $(ipaddr 2 $vlan) $(ipaddr 3 $vlan) bc
+
+ qbl=$(busywait 5000 until_counter_is ">= 500000" \
+ get_qdisc_backlog $vlan)
+ check_err $? "Could not build MC backlog"
+
+ # Verify that we actually see the backlog on BUM TC. Do a busywait as
+ # well, performance blips might cause false fail.
+ local ebl
+ ebl=$(busywait 5000 until_counter_is ">= 500000" \
+ get_mc_transmit_queue $vlan)
+ check_err $? "MC backlog reported by qdisc not visible in ethtool"
+
+ stop_traffic
+ stop_traffic
+
+ log_test "TC $((vlan - 10)): Qdisc reports MC backlog"
+}
generated by cgit (git 2.34.1) at 2024-05-03 23:20:25 +0000