tools/testing/selftests/net/forwarding/router_multipath.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 ALL_TESTS="ping_ipv4 ping_ipv6 multipath_test"
   5 NUM_NETIFS=8
   6 source lib.sh
   7
   8 h1_create()
   9 {
  10         vrf_create "vrf-h1"
  11         ip link set dev $h1 master vrf-h1
  12
  13         ip link set dev vrf-h1 up
  14         ip link set dev $h1 up
  15
  16         ip address add 192.0.2.2/24 dev $h1
  17         ip address add 2001:db8:1::2/64 dev $h1
  18
  19         ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
  20         ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
  21 }
  22
  23 h1_destroy()
  24 {
  25         ip route del 2001:db8:2::/64 vrf vrf-h1
  26         ip route del 198.51.100.0/24 vrf vrf-h1
  27
  28         ip address del 2001:db8:1::2/64 dev $h1
  29         ip address del 192.0.2.2/24 dev $h1
  30
  31         ip link set dev $h1 down
  32         vrf_destroy "vrf-h1"
  33 }
  34
  35 h2_create()
  36 {
  37         vrf_create "vrf-h2"
  38         ip link set dev $h2 master vrf-h2
  39
  40         ip link set dev vrf-h2 up
  41         ip link set dev $h2 up
  42
  43         ip address add 198.51.100.2/24 dev $h2
  44         ip address add 2001:db8:2::2/64 dev $h2
  45
  46         ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
  47         ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
  48 }
  49
  50 h2_destroy()
  51 {
  52         ip route del 2001:db8:1::/64 vrf vrf-h2
  53         ip route del 192.0.2.0/24 vrf vrf-h2
  54
  55         ip address del 2001:db8:2::2/64 dev $h2
  56         ip address del 198.51.100.2/24 dev $h2
  57
  58         ip link set dev $h2 down
  59         vrf_destroy "vrf-h2"
  60 }
  61
  62 router1_create()
  63 {
  64         vrf_create "vrf-r1"
  65         ip link set dev $rp11 master vrf-r1
  66         ip link set dev $rp12 master vrf-r1
  67         ip link set dev $rp13 master vrf-r1
  68
  69         ip link set dev vrf-r1 up
  70         ip link set dev $rp11 up
  71         ip link set dev $rp12 up
  72         ip link set dev $rp13 up
  73
  74         ip address add 192.0.2.1/24 dev $rp11
  75         ip address add 2001:db8:1::1/64 dev $rp11
  76
  77         ip address add 169.254.2.12/24 dev $rp12
  78         ip address add fe80:2::12/64 dev $rp12
  79
  80         ip address add 169.254.3.13/24 dev $rp13
  81         ip address add fe80:3::13/64 dev $rp13
  82
  83         ip route add 198.51.100.0/24 vrf vrf-r1 \
  84                 nexthop via 169.254.2.22 dev $rp12 \
  85                 nexthop via 169.254.3.23 dev $rp13
  86         ip route add 2001:db8:2::/64 vrf vrf-r1 \
  87                 nexthop via fe80:2::22 dev $rp12 \
  88                 nexthop via fe80:3::23 dev $rp13
  89 }
  90
  91 router1_destroy()
  92 {
  93         ip route del 2001:db8:2::/64 vrf vrf-r1
  94         ip route del 198.51.100.0/24 vrf vrf-r1
  95
  96         ip address del fe80:3::13/64 dev $rp13
  97         ip address del 169.254.3.13/24 dev $rp13
  98
  99         ip address del fe80:2::12/64 dev $rp12
 100         ip address del 169.254.2.12/24 dev $rp12
 101
 102         ip address del 2001:db8:1::1/64 dev $rp11
 103         ip address del 192.0.2.1/24 dev $rp11
 104
 105         ip link set dev $rp13 down
 106         ip link set dev $rp12 down
 107         ip link set dev $rp11 down
 108
 109         vrf_destroy "vrf-r1"
 110 }
 111
 112 router2_create()
 113 {
 114         vrf_create "vrf-r2"
 115         ip link set dev $rp21 master vrf-r2
 116         ip link set dev $rp22 master vrf-r2
 117         ip link set dev $rp23 master vrf-r2
 118
 119         ip link set dev vrf-r2 up
 120         ip link set dev $rp21 up
 121         ip link set dev $rp22 up
 122         ip link set dev $rp23 up
 123
 124         ip address add 198.51.100.1/24 dev $rp21
 125         ip address add 2001:db8:2::1/64 dev $rp21
 126
 127         ip address add 169.254.2.22/24 dev $rp22
 128         ip address add fe80:2::22/64 dev $rp22
 129
 130         ip address add 169.254.3.23/24 dev $rp23
 131         ip address add fe80:3::23/64 dev $rp23
 132
 133         ip route add 192.0.2.0/24 vrf vrf-r2 \
 134                 nexthop via 169.254.2.12 dev $rp22 \
 135                 nexthop via 169.254.3.13 dev $rp23
 136         ip route add 2001:db8:1::/64 vrf vrf-r2 \
 137                 nexthop via fe80:2::12 dev $rp22 \
 138                 nexthop via fe80:3::13 dev $rp23
 139 }
 140
 141 router2_destroy()
 142 {
 143         ip route del 2001:db8:1::/64 vrf vrf-r2
 144         ip route del 192.0.2.0/24 vrf vrf-r2
 145
 146         ip address del fe80:3::23/64 dev $rp23
 147         ip address del 169.254.3.23/24 dev $rp23
 148
 149         ip address del fe80:2::22/64 dev $rp22
 150         ip address del 169.254.2.22/24 dev $rp22
 151
 152         ip address del 2001:db8:2::1/64 dev $rp21
 153         ip address del 198.51.100.1/24 dev $rp21
 154
 155         ip link set dev $rp23 down
 156         ip link set dev $rp22 down
 157         ip link set dev $rp21 down
 158
 159         vrf_destroy "vrf-r2"
 160 }
 161
 162 multipath4_test()
 163 {
 164        local desc="$1"
 165        local weight_rp12=$2
 166        local weight_rp13=$3
 167        local t0_rp12 t0_rp13 t1_rp12 t1_rp13
 168        local packets_rp12 packets_rp13
 169
 170        # Transmit multiple flows from h1 to h2 and make sure they are
 171        # distributed between both multipath links (rp12 and rp13)
 172        # according to the configured weights.
 173        sysctl_set net.ipv4.fib_multipath_hash_policy 1
 174        ip route replace 198.51.100.0/24 vrf vrf-r1 \
 175                nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \
 176                nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13
 177
 178        t0_rp12=$(link_stats_tx_packets_get $rp12)
 179        t0_rp13=$(link_stats_tx_packets_get $rp13)
 180
 181        ip vrf exec vrf-h1 $MZ $h1 -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
 182                -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 183        sleep 1
 184
 185        t1_rp12=$(link_stats_tx_packets_get $rp12)
 186        t1_rp13=$(link_stats_tx_packets_get $rp13)
 187
 188        let "packets_rp12 = $t1_rp12 - $t0_rp12"
 189        let "packets_rp13 = $t1_rp13 - $t0_rp13"
 190        multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
 191
 192        # Restore settings.
 193        ip route replace 198.51.100.0/24 vrf vrf-r1 \
 194                nexthop via 169.254.2.22 dev $rp12 \
 195                nexthop via 169.254.3.23 dev $rp13
 196        sysctl_restore net.ipv4.fib_multipath_hash_policy
 197 }
 198
 199 multipath6_test()
 200 {
 201        local desc="$1"
 202        local weight_rp12=$2
 203        local weight_rp13=$3
 204        local t0_rp12 t0_rp13 t1_rp12 t1_rp13
 205        local packets_rp12 packets_rp13
 206
 207        # Transmit multiple flows from h1 to h2 and make sure they are
 208        # distributed between both multipath links (rp12 and rp13)
 209        # according to the configured weights.
 210        sysctl_set net.ipv6.fib_multipath_hash_policy 1
 211
 212        ip route replace 2001:db8:2::/64 vrf vrf-r1 \
 213                nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
 214                nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
 215
 216        t0_rp12=$(link_stats_tx_packets_get $rp12)
 217        t0_rp13=$(link_stats_tx_packets_get $rp13)
 218
 219        $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
 220                -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 221        sleep 1
 222
 223        t1_rp12=$(link_stats_tx_packets_get $rp12)
 224        t1_rp13=$(link_stats_tx_packets_get $rp13)
 225
 226        let "packets_rp12 = $t1_rp12 - $t0_rp12"
 227        let "packets_rp13 = $t1_rp13 - $t0_rp13"
 228        multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
 229
 230        ip route replace 2001:db8:2::/64 vrf vrf-r1 \
 231                nexthop via fe80:2::22 dev $rp12 \
 232                nexthop via fe80:3::23 dev $rp13
 233
 234        sysctl_restore net.ipv6.fib_multipath_hash_policy
 235 }
 236
 237 multipath_test()
 238 {
 239         log_info "Running IPv4 multipath tests"
 240         multipath4_test "ECMP" 1 1
 241         multipath4_test "Weighted MP 2:1" 2 1
 242         multipath4_test "Weighted MP 11:45" 11 45
 243
 244         log_info "Running IPv6 multipath tests"
 245         multipath6_test "ECMP" 1 1
 246         multipath6_test "Weighted MP 2:1" 2 1
 247         multipath6_test "Weighted MP 11:45" 11 45
 248 }
 249
 250 setup_prepare()
 251 {
 252         h1=${NETIFS[p1]}
 253         rp11=${NETIFS[p2]}
 254
 255         rp12=${NETIFS[p3]}
 256         rp22=${NETIFS[p4]}
 257
 258         rp13=${NETIFS[p5]}
 259         rp23=${NETIFS[p6]}
 260
 261         rp21=${NETIFS[p7]}
 262         h2=${NETIFS[p8]}
 263
 264         vrf_prepare
 265
 266         h1_create
 267         h2_create
 268
 269         router1_create
 270         router2_create
 271
 272         forwarding_enable
 273 }
 274
 275 cleanup()
 276 {
 277         pre_cleanup
 278
 279         forwarding_restore
 280
 281         router2_destroy
 282         router1_destroy
 283
 284         h2_destroy
 285         h1_destroy
 286
 287         vrf_cleanup
 288 }
 289
 290 ping_ipv4()
 291 {
 292         ping_test $h1 198.51.100.2
 293 }
 294
 295 ping_ipv6()
 296 {
 297         ping6_test $h1 2001:db8:2::2
 298 }
 299
 300 trap cleanup EXIT
 301
 302 setup_prepare
 303 setup_wait
 304
 305 tests_run
 306
 307 exit $EXIT_STATUS