name : qos_dscp_bridge.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP # tag and are prioritized according to the map at $swp1. They egress $swp2 and # the DSCP value is updated to match the map at that interface. The updated DSCP # tag is verified at $h2. # # ICMP responses are produced with the same DSCP tag that arrived at $h2. They # go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is # verified at $h1--it should match the original tag. # # +----------------------+ +----------------------+ # | H1 | | H2 | # | + $h1 | | $h2 + | # | | 192.0.2.1/28 | | 192.0.2.2/28 | | # +----|-----------------+ +----------------|-----+ # | | # +----|----------------------------------------------------------------|-----+ # | SW | | | # | +-|----------------------------------------------------------------|-+ | # | | + $swp1 BR $swp2 + | | # | | dcb dscp-prio 10:0...17:7 dcb dscp-prio 20:0...27:7 | | # | +--------------------------------------------------------------------+ | # +---------------------------------------------------------------------------+ ALL_TESTS=" ping_ipv4 test_dscp " lib_dir=$(dirname $0)/../../../net/forwarding NUM_NETIFS=4 source $lib_dir/lib.sh h1_create() { simple_if_init $h1 192.0.2.1/28 tc qdisc add dev $h1 clsact dscp_capture_install $h1 10 } h1_destroy() { dscp_capture_uninstall $h1 10 tc qdisc del dev $h1 clsact simple_if_fini $h1 192.0.2.1/28 } h2_create() { simple_if_init $h2 192.0.2.2/28 tc qdisc add dev $h2 clsact dscp_capture_install $h2 20 } h2_destroy() { dscp_capture_uninstall $h2 20 tc qdisc del dev $h2 clsact simple_if_fini $h2 192.0.2.2/28 } switch_create() { ip link add name br1 type bridge vlan_filtering 1 ip link set dev br1 addrgenmode none ip link set dev br1 up ip link set dev $swp1 master br1 ip link set dev $swp1 up ip link set dev $swp2 master br1 ip link set dev $swp2 up dcb app add dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7 dcb app add dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:7 } switch_destroy() { dcb app del dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:7 dcb app del dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7 ip link set dev $swp2 down ip link set dev $swp2 nomaster ip link set dev $swp1 down ip link set dev $swp1 nomaster ip link del dev br1 } setup_prepare() { h1=${NETIFS[p1]} swp1=${NETIFS[p2]} swp2=${NETIFS[p3]} h2=${NETIFS[p4]} vrf_prepare h1_create h2_create switch_create } cleanup() { pre_cleanup switch_destroy h2_destroy h1_destroy vrf_cleanup } ping_ipv4() { ping_test $h1 192.0.2.2 } dscp_ping_test() { local vrf_name=$1; shift local sip=$1; shift local dip=$1; shift local prio=$1; shift local dev_10=$1; shift local dev_20=$1; shift local key local dscp_10=$(((prio + 10) << 2)) local dscp_20=$(((prio + 20) << 2)) RET=0 local -A t0s eval "t0s=($(dscp_fetch_stats $dev_10 10) $(dscp_fetch_stats $dev_20 20))" local ping_timeout=$((PING_TIMEOUT * 5)) ip vrf exec $vrf_name \ ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \ -c 10 -i 0.5 -w $ping_timeout &> /dev/null local -A t1s eval "t1s=($(dscp_fetch_stats $dev_10 10) $(dscp_fetch_stats $dev_20 20))" for key in ${!t0s[@]}; do local expect if ((key == prio+10 || key == prio+20)); then expect=10 else expect=0 fi local delta=$((t1s[$key] - t0s[$key])) ((expect == delta)) check_err $? "DSCP $key: Expected to capture $expect packets, got $delta." done log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20" } test_dscp() { local prio for prio in {0..7}; do dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2 done } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS