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selftests: mlxsw: Add test for trust-DSCP
Add a test that exercises the new code. Send DSCP-tagged packets, and observe how they are prioritized in the switch and the DSCP is updated on egress again. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata
David S. Miller
parent
b2b1dab688
commit
d159261f36
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP
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# tag and are prioritized according to the map at $swp1. They egress $swp2 and
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# the DSCP value is updated to match the map at that interface. The updated DSCP
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# tag is verified at $h2.
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#
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# ICMP responses are produced with the same DSCP tag that arrived at $h2. They
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# go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is
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# verified at $h1--it should match the original tag.
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#
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# +----------------------+ +----------------------+
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# | H1 | | H2 |
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# | + $h1 | | $h2 + |
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# | | 192.0.2.1/28 | | 192.0.2.2/28 | |
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# +----|-----------------+ +----------------|-----+
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# | |
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# +----|----------------------------------------------------------------|-----+
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# | SW | | |
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# | +-|----------------------------------------------------------------|-+ |
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# | | + $swp1 BR $swp2 + | |
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# | | APP=0,5,10 .. 7,5,17 APP=0,5,20 .. 7,5,27 | |
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# | +--------------------------------------------------------------------+ |
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# +---------------------------------------------------------------------------+
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ALL_TESTS="
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ping_ipv4
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test_dscp
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"
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lib_dir=$(dirname $0)/../../../net/forwarding
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NUM_NETIFS=4
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source $lib_dir/lib.sh
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__dscp_capture_add_del()
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{
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local add_del=$1; shift
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local dev=$1; shift
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local base=$1; shift
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local dscp;
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for prio in {0..7}; do
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dscp=$((base + prio))
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__icmp_capture_add_del $add_del $dscp "" $dev \
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"ip_tos $((dscp << 2))"
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done
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}
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dscp_capture_install()
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{
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local dev=$1; shift
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local base=$1; shift
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__dscp_capture_add_del add $dev $base
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}
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dscp_capture_uninstall()
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{
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local dev=$1; shift
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local base=$1; shift
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__dscp_capture_add_del del $dev $base
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}
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h1_create()
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{
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local dscp;
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simple_if_init $h1 192.0.2.1/28
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tc qdisc add dev $h1 clsact
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dscp_capture_install $h1 10
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}
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h1_destroy()
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{
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dscp_capture_uninstall $h1 10
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tc qdisc del dev $h1 clsact
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simple_if_fini $h1 192.0.2.1/28
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}
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h2_create()
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{
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simple_if_init $h2 192.0.2.2/28
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tc qdisc add dev $h2 clsact
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dscp_capture_install $h2 20
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}
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h2_destroy()
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{
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dscp_capture_uninstall $h2 20
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tc qdisc del dev $h2 clsact
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simple_if_fini $h2 192.0.2.2/28
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}
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dscp_map()
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{
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local base=$1; shift
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for prio in {0..7}; do
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echo app=$prio,5,$((base + prio))
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done
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}
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lldpad_wait()
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{
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local dev=$1; shift
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while lldptool -t -i $dev -V APP -c app | grep -q pending; do
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echo "$dev: waiting for lldpad to push pending APP updates"
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sleep 5
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done
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}
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switch_create()
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{
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ip link add name br1 type bridge vlan_filtering 1
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ip link set dev br1 up
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ip link set dev $swp1 master br1
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ip link set dev $swp1 up
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ip link set dev $swp2 master br1
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ip link set dev $swp2 up
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lldptool -T -i $swp1 -V APP $(dscp_map 10) >/dev/null
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lldptool -T -i $swp2 -V APP $(dscp_map 20) >/dev/null
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lldpad_wait $swp1
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lldpad_wait $swp2
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}
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switch_destroy()
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{
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lldptool -T -i $swp2 -V APP -d $(dscp_map 20) >/dev/null
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lldptool -T -i $swp1 -V APP -d $(dscp_map 10) >/dev/null
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# Give lldpad a chance to push down the changes. If the device is downed
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# too soon, the updates will be left pending, but will have been struck
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# off the lldpad's DB already, and we won't be able to tell. Then on
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# next test iteration this would cause weirdness as newly-added APP
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# rules conflict with the old ones, sometimes getting stuck in an
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# "unknown" state.
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sleep 5
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ip link set dev $swp2 nomaster
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ip link set dev $swp1 nomaster
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ip link del dev br1
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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swp1=${NETIFS[p2]}
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swp2=${NETIFS[p3]}
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h2=${NETIFS[p4]}
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vrf_prepare
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h1_create
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h2_create
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switch_create
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}
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cleanup()
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{
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pre_cleanup
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switch_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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dscp_fetch_stats()
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{
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local dev=$1; shift
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local base=$1; shift
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for prio in {0..7}; do
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local dscp=$((base + prio))
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local t=$(tc_rule_stats_get $dev $dscp)
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echo "[$dscp]=$t "
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done
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}
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ping_ipv4()
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{
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ping_test $h1 192.0.2.2
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}
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dscp_ping_test()
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{
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local vrf_name=$1; shift
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local sip=$1; shift
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local dip=$1; shift
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local prio=$1; shift
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local dev_10=$1; shift
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local dev_20=$1; shift
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local dscp_10=$(((prio + 10) << 2))
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local dscp_20=$(((prio + 20) << 2))
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RET=0
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local -A t0s
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eval "t0s=($(dscp_fetch_stats $dev_10 10)
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$(dscp_fetch_stats $dev_20 20))"
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ip vrf exec $vrf_name \
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${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \
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-c 10 -i 0.1 -w 2 &> /dev/null
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local -A t1s
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eval "t1s=($(dscp_fetch_stats $dev_10 10)
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$(dscp_fetch_stats $dev_20 20))"
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for key in ${!t0s[@]}; do
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local expect
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if ((key == dscp_10 || key == dscp_20)); then
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expect=10
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else
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expect=0
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fi
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local delta=$((t1s[key] - t0s[key]))
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((expect == delta))
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check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."
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done
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log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"
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}
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test_dscp()
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{
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for prio in {0..7}; do
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dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2
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done
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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tests_run
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exit $EXIT_STATUS
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