tools/testing/selftests/drivers/net/mlxsw/qos_dscp_bridge.sh

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