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 $swp2 + | | 23# | | dcb dscp-prio 10:0...17:7 dcb dscp-prio 20:0...27:7 | | 24# | +--------------------------------------------------------------------+ | 25# +---------------------------------------------------------------------------+ 26 27ALL_TESTS=" 28 ping_ipv4 29 test_dscp 30" 31 32lib_dir=$(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 65switch_create() 66{ 67 ip link add name br1 type bridge vlan_filtering 1 68 ip link set dev br1 addrgenmode none 69 ip link set dev br1 up 70 ip link set dev $swp1 master br1 71 ip link set dev $swp1 up 72 ip link set dev $swp2 master br1 73 ip link set dev $swp2 up 74 75 dcb app add dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7 76 dcb app add dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:7 77} 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 27:7 82 dcb app del dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7 83 84 ip link set dev $swp2 down 85 ip link set dev $swp2 nomaster 86 ip link set dev $swp1 down 87 ip link set dev $swp1 nomaster 88 ip link del dev br1 89} 90 91setup_prepare() 92{ 93 h1=${NETIFS[p1]} 94 swp1=${NETIFS[p2]} 95 96 swp2=${NETIFS[p3]} 97 h2=${NETIFS[p4]} 98 99 vrf_prepare 100 101 h1_create 102 h2_create 103 switch_create 104} 105 106cleanup() 107{ 108 pre_cleanup 109 110 switch_destroy 111 h2_destroy 112 h1_destroy 113 114 vrf_cleanup 115} 116 117ping_ipv4() 118{ 119 ping_test $h1 192.0.2.2 120} 121 122dscp_ping_test() 123{ 124 local vrf_name=$1; shift 125 local sip=$1; shift 126 local dip=$1; shift 127 local prio=$1; shift 128 local dev_10=$1; shift 129 local dev_20=$1; shift 130 local key 131 132 local dscp_10=$(((prio + 10) << 2)) 133 local dscp_20=$(((prio + 20) << 2)) 134 135 RET=0 136 137 local -A t0s 138 eval "t0s=($(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 $ping_timeout &> /dev/null 145 146 local -A t1s 147 eval "t1s=($(dscp_fetch_stats $dev_10 10) 148 $(dscp_fetch_stats $dev_20 20))" 149 150 for key in ${!t0s[@]}; do 151 local expect 152 if ((key == prio+10 || key == prio+20)); then 153 expect=10 154 else 155 expect=0 156 fi 157 158 local delta=$((t1s[$key] - t0s[$key])) 159 ((expect == delta)) 160 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta." 161 done 162 163 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20" 164} 165 166test_dscp() 167{ 168 local prio 169 170 for prio in {0..7}; do 171 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2 172 done 173} 174 175trap cleanup EXIT 176 177setup_prepare 178setup_wait 179 180tests_run 181 182exit $EXIT_STATUS 183