Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Test traffic distribution when there are multiple paths between an IPv4 GRE # tunnel. The tunnel carries IPv4 and IPv6 traffic between multiple hosts. # Multiple routes are in the underlay network. With the default multipath # policy, SW2 will only look at the outer IP addresses, hence only a single # route would be used. # # +--------------------------------+ # | H1 | # | $h1 + | # | 198.51.100.{2-253}/24 | | # | 2001:db8:1::{2-fd}/64 | | # +-------------------------|------+ # | # +-------------------------|------------------+ # | SW1 | | # | $ol1 + | # | 198.51.100.1/24 | # | 2001:db8:1::1/64 | # | | # | + g1 (gre) | # | loc=192.0.2.1 | # | rem=192.0.2.2 --. | # | tos=inherit | | # | v | # | + $ul1 | # | | 192.0.2.17/28 | # +---------------------|----------------------+ # | # +---------------------|----------------------+ # | SW2 | | # | $ul21 + | # | 192.0.2.18/28 | | # | | | # ! __________________+___ | # | / \ | # | | | | # | + $ul22.111 (vlan) + $ul22.222 (vlan) | # | | 192.0.2.33/28 | 192.0.2.49/28 | # | | | | # +--|----------------------|------------------+ # | | # +--|----------------------|------------------+ # | | | | # | + $ul32.111 (vlan) + $ul32.222 (vlan) | # | | 192.0.2.34/28 | 192.0.2.50/28 | # | | | | # | \__________________+___/ | # | | | # | | | # | $ul31 + | # | 192.0.2.65/28 | SW3 | # +---------------------|----------------------+ # | # +---------------------|----------------------+ # | + $ul4 | # | ^ 192.0.2.66/28 | # | | | # | + g2 (gre) | | # | loc=192.0.2.2 | | # | rem=192.0.2.1 --' | # | tos=inherit | # | | # | $ol4 + | # | 203.0.113.1/24 | | # | 2001:db8:2::1/64 | SW4 | # +-------------------------|------------------+ # | # +-------------------------|------+ # | | | # | $h2 + | # | 203.0.113.{2-253}/24 | # | 2001:db8:2::{2-fd}/64 H2 | # +--------------------------------+ ALL_TESTS=" ping_ipv4 ping_ipv6 custom_hash " NUM_NETIFS=10 source lib.sh h1_create() { simple_if_init $h1 198.51.100.2/24 2001:db8:1::2/64 ip route add vrf v$h1 default via 198.51.100.1 dev $h1 ip -6 route add vrf v$h1 default via 2001:db8:1::1 dev $h1 } h1_destroy() { ip -6 route del vrf v$h1 default ip route del vrf v$h1 default simple_if_fini $h1 198.51.100.2/24 2001:db8:1::2/64 } sw1_create() { simple_if_init $ol1 198.51.100.1/24 2001:db8:1::1/64 __simple_if_init $ul1 v$ol1 192.0.2.17/28 tunnel_create g1 gre 192.0.2.1 192.0.2.2 tos inherit dev v$ol1 __simple_if_init g1 v$ol1 192.0.2.1/32 ip route add vrf v$ol1 192.0.2.2/32 via 192.0.2.18 ip route add vrf v$ol1 203.0.113.0/24 dev g1 ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1 } sw1_destroy() { ip -6 route del vrf v$ol1 2001:db8:2::/64 ip route del vrf v$ol1 203.0.113.0/24 ip route del vrf v$ol1 192.0.2.2/32 __simple_if_fini g1 192.0.2.1/32 tunnel_destroy g1 __simple_if_fini $ul1 192.0.2.17/28 simple_if_fini $ol1 198.51.100.1/24 2001:db8:1::1/64 } sw2_create() { simple_if_init $ul21 192.0.2.18/28 __simple_if_init $ul22 v$ul21 vlan_create $ul22 111 v$ul21 192.0.2.33/28 vlan_create $ul22 222 v$ul21 192.0.2.49/28 ip route add vrf v$ul21 192.0.2.1/32 via 192.0.2.17 ip route add vrf v$ul21 192.0.2.2/32 \ nexthop via 192.0.2.34 \ nexthop via 192.0.2.50 } sw2_destroy() { ip route del vrf v$ul21 192.0.2.2/32 ip route del vrf v$ul21 192.0.2.1/32 vlan_destroy $ul22 222 vlan_destroy $ul22 111 __simple_if_fini $ul22 simple_if_fini $ul21 192.0.2.18/28 } sw3_create() { simple_if_init $ul31 192.0.2.65/28 __simple_if_init $ul32 v$ul31 vlan_create $ul32 111 v$ul31 192.0.2.34/28 vlan_create $ul32 222 v$ul31 192.0.2.50/28 ip route add vrf v$ul31 192.0.2.2/32 via 192.0.2.66 ip route add vrf v$ul31 192.0.2.1/32 \ nexthop via 192.0.2.33 \ nexthop via 192.0.2.49 tc qdisc add dev $ul32 clsact tc filter add dev $ul32 ingress pref 111 prot 802.1Q \ flower vlan_id 111 action pass tc filter add dev $ul32 ingress pref 222 prot 802.1Q \ flower vlan_id 222 action pass } sw3_destroy() { tc qdisc del dev $ul32 clsact ip route del vrf v$ul31 192.0.2.1/32 ip route del vrf v$ul31 192.0.2.2/32 vlan_destroy $ul32 222 vlan_destroy $ul32 111 __simple_if_fini $ul32 simple_if_fini $ul31 192.0.2.65/28 } sw4_create() { simple_if_init $ol4 203.0.113.1/24 2001:db8:2::1/64 __simple_if_init $ul4 v$ol4 192.0.2.66/28 tunnel_create g2 gre 192.0.2.2 192.0.2.1 tos inherit dev v$ol4 __simple_if_init g2 v$ol4 192.0.2.2/32 ip route add vrf v$ol4 192.0.2.1/32 via 192.0.2.65 ip route add vrf v$ol4 198.51.100.0/24 dev g2 ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2 } sw4_destroy() { ip -6 route del vrf v$ol4 2001:db8:1::/64 ip route del vrf v$ol4 198.51.100.0/24 ip route del vrf v$ol4 192.0.2.1/32 __simple_if_fini g2 192.0.2.2/32 tunnel_destroy g2 __simple_if_fini $ul4 192.0.2.66/28 simple_if_fini $ol4 203.0.113.1/24 2001:db8:2::1/64 } h2_create() { simple_if_init $h2 203.0.113.2/24 2001:db8:2::2/64 ip route add vrf v$h2 default via 203.0.113.1 dev $h2 ip -6 route add vrf v$h2 default via 2001:db8:2::1 dev $h2 } h2_destroy() { ip -6 route del vrf v$h2 default ip route del vrf v$h2 default simple_if_fini $h2 203.0.113.2/24 2001:db8:2::2/64 } setup_prepare() { h1=${NETIFS[p1]} ol1=${NETIFS[p2]} ul1=${NETIFS[p3]} ul21=${NETIFS[p4]} ul22=${NETIFS[p5]} ul32=${NETIFS[p6]} ul31=${NETIFS[p7]} ul4=${NETIFS[p8]} ol4=${NETIFS[p9]} h2=${NETIFS[p10]} vrf_prepare h1_create sw1_create sw2_create sw3_create sw4_create h2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore h2_destroy sw4_destroy sw3_destroy sw2_destroy sw1_destroy h1_destroy vrf_cleanup } ping_ipv4() { ping_test $h1 203.0.113.2 } ping_ipv6() { ping6_test $h1 2001:db8:2::2 } send_src_ipv4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A "198.51.100.2-198.51.100.253" -B 203.0.113.2 \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_dst_ipv4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B "203.0.113.2-203.0.113.253" \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_src_udp4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B 203.0.113.2 \ -d 1msec -t udp "sp=0-32768,dp=30000" } send_dst_udp4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B 203.0.113.2 \ -d 1msec -t udp "sp=20000,dp=0-32768" } send_src_ipv6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A "2001:db8:1::2-2001:db8:1::fd" -B 2001:db8:2::2 \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_dst_ipv6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B "2001:db8:2::2-2001:db8:2::fd" \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_flowlabel() { # Generate 16384 echo requests, each with a random flow label. for _ in $(seq 1 16384); do ip vrf exec v$h1 \ $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1 done } send_src_udp6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B 2001:db8:2::2 \ -d 1msec -t udp "sp=0-32768,dp=30000" } send_dst_udp6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B 2001:db8:2::2 \ -d 1msec -t udp "sp=20000,dp=0-32768" } custom_hash_test() { local field="$1"; shift local balanced="$1"; shift local send_flows="$@" RET=0 local t0_111=$(tc_rule_stats_get $ul32 111 ingress) local t0_222=$(tc_rule_stats_get $ul32 222 ingress) $send_flows local t1_111=$(tc_rule_stats_get $ul32 111 ingress) local t1_222=$(tc_rule_stats_get $ul32 222 ingress) local d111=$((t1_111 - t0_111)) local d222=$((t1_222 - t0_222)) local diff=$((d222 - d111)) local sum=$((d111 + d222)) local pct=$(echo "$diff / $sum * 100" | bc -l) local is_balanced=$(echo "-20 <= $pct && $pct <= 20" | bc) [[ ( $is_balanced -eq 1 && $balanced == "balanced" ) || ( $is_balanced -eq 0 && $balanced == "unbalanced" ) ]] check_err $? "Expected traffic to be $balanced, but it is not" log_test "Multipath hash field: $field ($balanced)" log_info "Packets sent on path1 / path2: $d111 / $d222" } custom_hash_v4() { log_info "Running IPv4 overlay custom multipath hash tests" # Prevent the neighbour table from overflowing, as different neighbour # entries will be created on $ol4 when using different destination IPs. sysctl_set net.ipv4.neigh.default.gc_thresh1 1024 sysctl_set net.ipv4.neigh.default.gc_thresh2 1024 sysctl_set net.ipv4.neigh.default.gc_thresh3 1024 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0040 custom_hash_test "Inner source IP" "balanced" send_src_ipv4 custom_hash_test "Inner source IP" "unbalanced" send_dst_ipv4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0080 custom_hash_test "Inner destination IP" "balanced" send_dst_ipv4 custom_hash_test "Inner destination IP" "unbalanced" send_src_ipv4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0400 custom_hash_test "Inner source port" "balanced" send_src_udp4 custom_hash_test "Inner source port" "unbalanced" send_dst_udp4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0800 custom_hash_test "Inner destination port" "balanced" send_dst_udp4 custom_hash_test "Inner destination port" "unbalanced" send_src_udp4 sysctl_restore net.ipv4.neigh.default.gc_thresh3 sysctl_restore net.ipv4.neigh.default.gc_thresh2 sysctl_restore net.ipv4.neigh.default.gc_thresh1 } custom_hash_v6() { log_info "Running IPv6 overlay custom multipath hash tests" # Prevent the neighbour table from overflowing, as different neighbour # entries will be created on $ol4 when using different destination IPs. sysctl_set net.ipv6.neigh.default.gc_thresh1 1024 sysctl_set net.ipv6.neigh.default.gc_thresh2 1024 sysctl_set net.ipv6.neigh.default.gc_thresh3 1024 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0040 custom_hash_test "Inner source IP" "balanced" send_src_ipv6 custom_hash_test "Inner source IP" "unbalanced" send_dst_ipv6 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0080 custom_hash_test "Inner destination IP" "balanced" send_dst_ipv6 custom_hash_test "Inner destination IP" "unbalanced" send_src_ipv6 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0200 custom_hash_test "Inner flowlabel" "balanced" send_flowlabel custom_hash_test "Inner flowlabel" "unbalanced" send_src_ipv6 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0400 custom_hash_test "Inner source port" "balanced" send_src_udp6 custom_hash_test "Inner source port" "unbalanced" send_dst_udp6 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0800 custom_hash_test "Inner destination port" "balanced" send_dst_udp6 custom_hash_test "Inner destination port" "unbalanced" send_src_udp6 sysctl_restore net.ipv6.neigh.default.gc_thresh3 sysctl_restore net.ipv6.neigh.default.gc_thresh2 sysctl_restore net.ipv6.neigh.default.gc_thresh1 } custom_hash() { # Test that when the hash policy is set to custom, traffic is # distributed only according to the fields set in the # fib_multipath_hash_fields sysctl. # # Each time set a different field and make sure traffic is only # distributed when the field is changed in the packet stream. sysctl_set net.ipv4.fib_multipath_hash_policy 3 custom_hash_v4 custom_hash_v6 sysctl_restore net.ipv4.fib_multipath_hash_policy } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS |