1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4# Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP 5# tag and are prioritized according to the map at $swp1. They egress $swp2 and 6# the DSCP value is updated to match the map at that interface. The updated DSCP 7# tag is verified at $h2. 8# 9# ICMP responses are produced with the same DSCP tag that arrived at $h2. They 10# go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is 11# 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 $swp2 + | | 23# | | APP=0,5,10 .. 7,5,17 APP=0,5,20 .. 7,5,27 | | 24# | +--------------------------------------------------------------------+ | 25# +---------------------------------------------------------------------------+ 26 27ALL_TESTS=" 28 ping_ipv4 29 test_dscp 30" 31 32lib_dir=$(dirname $0)/../../../net/forwarding 33 34NUM_NETIFS=4 35source $lib_dir/lib.sh 36 37h1_create() 38{ 39 simple_if_init $h1 192.0.2.1/28 40 tc qdisc add dev $h1 clsact 41 dscp_capture_install $h1 10 42} 43 44h1_destroy() 45{ 46 dscp_capture_uninstall $h1 10 47 tc qdisc del dev $h1 clsact 48 simple_if_fini $h1 192.0.2.1/28 49} 50 51h2_create() 52{ 53 simple_if_init $h2 192.0.2.2/28 54 tc qdisc add dev $h2 clsact 55 dscp_capture_install $h2 20 56} 57 58h2_destroy() 59{ 60 dscp_capture_uninstall $h2 20 61 tc qdisc del dev $h2 clsact 62 simple_if_fini $h2 192.0.2.2/28 63} 64 65dscp_map() 66{ 67 local base=$1; shift 68 local prio 69 70 for prio in {0..7}; do 71 echo app=$prio,5,$((base + prio)) 72 done 73} 74 75switch_create() 76{ 77 ip link add name br1 type bridge vlan_filtering 1 78 ip link set dev br1 up 79 ip link set dev $swp1 master br1 80 ip link set dev $swp1 up 81 ip link set dev $swp2 master br1 82 ip link set dev $swp2 up 83 84 lldptool -T -i $swp1 -V APP $(dscp_map 10) >/dev/null 85 lldptool -T -i $swp2 -V APP $(dscp_map 20) >/dev/null 86 lldpad_app_wait_set $swp1 87 lldpad_app_wait_set $swp2 88} 89 90switch_destroy() 91{ 92 lldptool -T -i $swp2 -V APP -d $(dscp_map 20) >/dev/null 93 lldptool -T -i $swp1 -V APP -d $(dscp_map 10) >/dev/null 94 lldpad_app_wait_del 95 96 ip link set dev $swp2 down 97 ip link set dev $swp2 nomaster 98 ip link set dev $swp1 down 99 ip link set dev $swp1 nomaster 100 ip link del dev br1 101} 102 103setup_prepare() 104{ 105 h1=${NETIFS[p1]} 106 swp1=${NETIFS[p2]} 107 108 swp2=${NETIFS[p3]} 109 h2=${NETIFS[p4]} 110 111 vrf_prepare 112 113 h1_create 114 h2_create 115 switch_create 116} 117 118cleanup() 119{ 120 pre_cleanup 121 122 switch_destroy 123 h2_destroy 124 h1_destroy 125 126 vrf_cleanup 127} 128 129ping_ipv4() 130{ 131 ping_test $h1 192.0.2.2 132} 133 134dscp_ping_test() 135{ 136 local vrf_name=$1; shift 137 local sip=$1; shift 138 local dip=$1; shift 139 local prio=$1; shift 140 local dev_10=$1; shift 141 local dev_20=$1; shift 142 local key 143 144 local dscp_10=$(((prio + 10) << 2)) 145 local dscp_20=$(((prio + 20) << 2)) 146 147 RET=0 148 149 local -A t0s 150 eval "t0s=($(dscp_fetch_stats $dev_10 10) 151 $(dscp_fetch_stats $dev_20 20))" 152 153 local ping_timeout=$((PING_TIMEOUT * 5)) 154 ip vrf exec $vrf_name \ 155 ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \ 156 -c 10 -i 0.5 -w $ping_timeout &> /dev/null 157 158 local -A t1s 159 eval "t1s=($(dscp_fetch_stats $dev_10 10) 160 $(dscp_fetch_stats $dev_20 20))" 161 162 for key in ${!t0s[@]}; do 163 local expect 164 if ((key == prio+10 || key == prio+20)); then 165 expect=10 166 else 167 expect=0 168 fi 169 170 local delta=$((t1s[$key] - t0s[$key])) 171 ((expect == delta)) 172 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta." 173 done 174 175 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20" 176} 177 178test_dscp() 179{ 180 local prio 181 182 for prio in {0..7}; do 183 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2 184 done 185} 186 187trap cleanup EXIT 188 189setup_prepare 190setup_wait 191 192tests_run 193 194exit $EXIT_STATUS 195