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router_multipath.sh
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linux-6.19.14/tools/testing/selftests/net/forwarding/router_multipath.sh
1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4ALL_TESTS="ping_ipv4 ping_ipv6 multipath_test" 5NUM_NETIFS=8 6source lib.sh 7 8h1_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 23h1_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 35h2_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 50h2_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 62router1_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 91router1_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 112router2_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 141router2_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 162multipath4_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 199multipath6_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 $rp13 233 234 sysctl_restore net.ipv6.fib_multipath_hash_policy 235} 236 237multipath_test() 238{ 239 log_info "Running IPv4 multipath tests" 240 multipath4_test "ECMP" 1 1 241 multipath4_test "Weighted MP 2:1" 2 1 242 multipath4_test "Weighted MP 11:45" 11 45 243 244 log_info "Running IPv6 multipath tests" 245 multipath6_test "ECMP" 1 1 246 multipath6_test "Weighted MP 2:1" 2 1 247 multipath6_test "Weighted MP 11:45" 11 45 248} 249 250setup_prepare() 251{ 252 h1=${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 275cleanup() 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 290ping_ipv4() 291{ 292 ping_test $h1 198.51.100.2 293} 294 295ping_ipv6() 296{ 297 ping6_test $h1 2001:db8:2::2 298} 299 300trap cleanup EXIT 301 302setup_prepare 303setup_wait 304 305tests_run 306 307exit $EXIT_STATUS
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