183 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03 4# Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP5# tag and are prioritized according to the map at $swp1. They egress $swp2 and6# the DSCP value is updated to match the map at that interface. The updated DSCP7# tag is verified at $h2.8#9# ICMP responses are produced with the same DSCP tag that arrived at $h2. They10# go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is11# verified at $h1--it should match the original tag.12#13# +----------------------+ +----------------------+14# | H1 | | H2 |15# | + $h1 | | $h2 + |16# | | 192.0.2.1/28 | | 192.0.2.2/28 | |17# +----|-----------------+ +----------------|-----+18# | |19# +----|----------------------------------------------------------------|-----+20# | SW | | |21# | +-|----------------------------------------------------------------|-+ |22# | | + $swp1 BR $swp2 + | |23# | | dcb dscp-prio 10:0...17:7 dcb dscp-prio 20:0...27:7 | |24# | +--------------------------------------------------------------------+ |25# +---------------------------------------------------------------------------+26 27ALL_TESTS="28 ping_ipv429 test_dscp30"31 32lib_dir=$(dirname $0)/../../../net/forwarding33 34NUM_NETIFS=435source $lib_dir/lib.sh36 37h1_create()38{39 simple_if_init $h1 192.0.2.1/2840 tc qdisc add dev $h1 clsact41 dscp_capture_install $h1 1042}43 44h1_destroy()45{46 dscp_capture_uninstall $h1 1047 tc qdisc del dev $h1 clsact48 simple_if_fini $h1 192.0.2.1/2849}50 51h2_create()52{53 simple_if_init $h2 192.0.2.2/2854 tc qdisc add dev $h2 clsact55 dscp_capture_install $h2 2056}57 58h2_destroy()59{60 dscp_capture_uninstall $h2 2061 tc qdisc del dev $h2 clsact62 simple_if_fini $h2 192.0.2.2/2863}64 65switch_create()66{67 ip link add name br1 type bridge vlan_filtering 168 ip link set dev br1 addrgenmode none69 ip link set dev br1 up70 ip link set dev $swp1 master br171 ip link set dev $swp1 up72 ip link set dev $swp2 master br173 ip link set dev $swp2 up74 75 dcb app add dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:776 dcb app add dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:777}78 79switch_destroy()80{81 dcb app del dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:782 dcb app del dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:783 84 ip link set dev $swp2 down85 ip link set dev $swp2 nomaster86 ip link set dev $swp1 down87 ip link set dev $swp1 nomaster88 ip link del dev br189}90 91setup_prepare()92{93 h1=${NETIFS[p1]}94 swp1=${NETIFS[p2]}95 96 swp2=${NETIFS[p3]}97 h2=${NETIFS[p4]}98 99 vrf_prepare100 101 h1_create102 h2_create103 switch_create104}105 106cleanup()107{108 pre_cleanup109 110 switch_destroy111 h2_destroy112 h1_destroy113 114 vrf_cleanup115}116 117ping_ipv4()118{119 ping_test $h1 192.0.2.2120}121 122dscp_ping_test()123{124 local vrf_name=$1; shift125 local sip=$1; shift126 local dip=$1; shift127 local prio=$1; shift128 local dev_10=$1; shift129 local dev_20=$1; shift130 local key131 132 local dscp_10=$(((prio + 10) << 2))133 local dscp_20=$(((prio + 20) << 2))134 135 RET=0136 137 local -A t0s138 eval "t0s=($(dscp_fetch_stats $dev_10 10)139 $(dscp_fetch_stats $dev_20 20))"140 141 local ping_timeout=$((PING_TIMEOUT * 5))142 ip vrf exec $vrf_name \143 ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \144 -c 10 -i 0.5 -w $ping_timeout &> /dev/null145 146 local -A t1s147 eval "t1s=($(dscp_fetch_stats $dev_10 10)148 $(dscp_fetch_stats $dev_20 20))"149 150 for key in ${!t0s[@]}; do151 local expect152 if ((key == prio+10 || key == prio+20)); then153 expect=10154 else155 expect=0156 fi157 158 local delta=$((t1s[$key] - t0s[$key]))159 ((expect == delta))160 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."161 done162 163 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"164}165 166test_dscp()167{168 local prio169 170 for prio in {0..7}; do171 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2172 done173}174 175trap cleanup EXIT176 177setup_prepare178setup_wait179 180tests_run181 182exit $EXIT_STATUS183