1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Check that route PMTU values match expectations, and that initial device MTU 5# values are assigned correctly 6# 7# Tests currently implemented: 8# 9# - pmtu_ipv4 10# Set up two namespaces, A and B, with two paths between them over routers 11# R1 and R2 (also implemented with namespaces), with different MTUs: 12# 13# segment a_r1 segment b_r1 a_r1: 2000 14# .--------------R1--------------. b_r1: 1400 15# A B a_r2: 2000 16# '--------------R2--------------' b_r2: 1500 17# segment a_r2 segment b_r2 18# 19# Check that PMTU exceptions with the correct PMTU are created. Then 20# decrease and increase the MTU of the local link for one of the paths, 21# A to R1, checking that route exception PMTU changes accordingly over 22# this path. Also check that locked exceptions are created when an ICMP 23# message advertising a PMTU smaller than net.ipv4.route.min_pmtu is 24# received 25# 26# - pmtu_ipv6 27# Same as pmtu_ipv4, except for locked PMTU tests, using IPv6 28# 29# - pmtu_ipv4_dscp_icmp_exception 30# Set up the same network topology as pmtu_ipv4, but use non-default 31# routing table in A. A fib-rule is used to jump to this routing table 32# based on DSCP. Send ICMPv4 packets with the expected DSCP value and 33# verify that ECN doesn't interfere with the creation of PMTU exceptions. 34# 35# - pmtu_ipv4_dscp_udp_exception 36# Same as pmtu_ipv4_dscp_icmp_exception, but use UDP instead of ICMP. 37# 38# - pmtu_ipv4_vxlan4_exception 39# Set up the same network topology as pmtu_ipv4, create a VXLAN tunnel 40# over IPv4 between A and B, routed via R1. On the link between R1 and B, 41# set a MTU lower than the VXLAN MTU and the MTU on the link between A and 42# R1. Send IPv4 packets, exceeding the MTU between R1 and B, over VXLAN 43# from A to B and check that the PMTU exception is created with the right 44# value on A 45# 46# - pmtu_ipv6_vxlan4_exception 47# Same as pmtu_ipv4_vxlan4_exception, but send IPv6 packets from A to B 48# 49# - pmtu_ipv4_vxlan6_exception 50# Same as pmtu_ipv4_vxlan4_exception, but use IPv6 transport from A to B 51# 52# - pmtu_ipv6_vxlan6_exception 53# Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B 54# 55# - pmtu_ipv4_geneve4_exception 56# Same as pmtu_ipv4_vxlan4_exception, but using a GENEVE tunnel instead of 57# VXLAN 58# 59# - pmtu_ipv6_geneve4_exception 60# Same as pmtu_ipv6_vxlan4_exception, but using a GENEVE tunnel instead of 61# VXLAN 62# 63# - pmtu_ipv4_geneve6_exception 64# Same as pmtu_ipv4_vxlan6_exception, but using a GENEVE tunnel instead of 65# VXLAN 66# 67# - pmtu_ipv6_geneve6_exception 68# Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of 69# VXLAN 70# 71# - pmtu_ipv{4,6}_br_vxlan{4,6}_exception 72# Set up three namespaces, A, B, and C, with routing between A and B over 73# R1. R2 is unused in these tests. A has a veth connection to C, and is 74# connected to B via a VXLAN endpoint, which is directly bridged to C. 75# MTU on the B-R1 link is lower than other MTUs. 76# 77# Check that both C and A are able to communicate with B over the VXLAN 78# tunnel, and that PMTU exceptions with the correct values are created. 79# 80# segment a_r1 segment b_r1 b_r1: 4000 81# .--------------R1--------------. everything 82# C---veth A B else: 5000 83# ' bridge | 84# '---- - - - - - VXLAN - - - - - - - ' 85# 86# - pmtu_ipv{4,6}_br_geneve{4,6}_exception 87# Same as pmtu_ipv{4,6}_br_vxlan{4,6}_exception, with a GENEVE tunnel 88# instead. 89# 90# - pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception 91# Set up two namespaces, B, and C, with routing between the init namespace 92# and B over R1. A and R2 are unused in these tests. The init namespace 93# has a veth connection to C, and is connected to B via a VXLAN endpoint, 94# which is handled by Open vSwitch and bridged to C. MTU on the B-R1 link 95# is lower than other MTUs. 96# 97# Check that C is able to communicate with B over the VXLAN tunnel, and 98# that PMTU exceptions with the correct values are created. 99# 100# segment a_r1 segment b_r1 b_r1: 4000 101# .--------------R1--------------. everything 102# C---veth init B else: 5000 103# '- ovs | 104# '---- - - - - - VXLAN - - - - - - - ' 105# 106# - pmtu_ipv{4,6}_ovs_geneve{4,6}_exception 107# Same as pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception, with a GENEVE tunnel 108# instead. 109# 110# - pmtu_ipv{4,6}_fou{4,6}_exception 111# Same as pmtu_ipv4_vxlan4, but using a direct IPv4/IPv6 encapsulation 112# (FoU) over IPv4/IPv6, instead of VXLAN 113# 114# - pmtu_ipv{4,6}_fou{4,6}_exception 115# Same as pmtu_ipv4_vxlan4, but using a generic UDP IPv4/IPv6 116# encapsulation (GUE) over IPv4/IPv6, instead of VXLAN 117# 118# - pmtu_ipv{4,6}_ipv{4,6}_exception 119# Same as pmtu_ipv4_vxlan4, but using a IPv4/IPv6 tunnel over IPv4/IPv6, 120# instead of VXLAN 121# 122# - pmtu_vti4_exception 123# Set up vti tunnel on top of veth, with xfrm states and policies, in two 124# namespaces with matching endpoints. Check that route exception is not 125# created if link layer MTU is not exceeded, then exceed it and check that 126# exception is created with the expected PMTU. The approach described 127# below for IPv6 doesn't apply here, because, on IPv4, administrative MTU 128# changes alone won't affect PMTU 129# 130# - pmtu_vti4_udp_exception 131# Same as pmtu_vti4_exception, but using ESP-in-UDP 132# 133# - pmtu_vti4_udp_routed_exception 134# Set up vti tunnel on top of veth connected through routing namespace and 135# add xfrm states and policies with ESP-in-UDP encapsulation. Check that 136# route exception is not created if link layer MTU is not exceeded, then 137# lower MTU on second part of routed environment and check that exception 138# is created with the expected PMTU. 139# 140# - pmtu_vti6_exception 141# Set up vti6 tunnel on top of veth, with xfrm states and policies, in two 142# namespaces with matching endpoints. Check that route exception is 143# created by exceeding link layer MTU with ping to other endpoint. Then 144# decrease and increase MTU of tunnel, checking that route exception PMTU 145# changes accordingly 146# 147# - pmtu_vti6_udp_exception 148# Same as pmtu_vti6_exception, but using ESP-in-UDP 149# 150# - pmtu_vti6_udp_routed_exception 151# Same as pmtu_vti6_udp_routed_exception but with routing between vti 152# endpoints 153# 154# - pmtu_vti4_default_mtu 155# Set up vti4 tunnel on top of veth, in two namespaces with matching 156# endpoints. Check that MTU assigned to vti interface is the MTU of the 157# lower layer (veth) minus additional lower layer headers (zero, for veth) 158# minus IPv4 header length 159# 160# - pmtu_vti6_default_mtu 161# Same as above, for IPv6 162# 163# - pmtu_vti4_link_add_mtu 164# Set up vti4 interface passing MTU value at link creation, check MTU is 165# configured, and that link is not created with invalid MTU values 166# 167# - pmtu_vti6_link_add_mtu 168# Same as above, for IPv6 169# 170# - pmtu_vti6_link_change_mtu 171# Set up two dummy interfaces with different MTUs, create a vti6 tunnel 172# and check that configured MTU is used on link creation and changes, and 173# that MTU is properly calculated instead when MTU is not configured from 174# userspace 175# 176# - cleanup_ipv4_exception 177# Similar to pmtu_ipv4_vxlan4_exception, but explicitly generate PMTU 178# exceptions on multiple CPUs and check that the veth device tear-down 179# happens in a timely manner 180# 181# - cleanup_ipv6_exception 182# Same as above, but use IPv6 transport from A to B 183# 184# - list_flush_ipv4_exception 185# Using the same topology as in pmtu_ipv4, create exceptions, and check 186# they are shown when listing exception caches, gone after flushing them 187# 188# - list_flush_ipv6_exception 189# Using the same topology as in pmtu_ipv6, create exceptions, and check 190# they are shown when listing exception caches, gone after flushing them 191# 192# - pmtu_ipv4_route_change 193# Use the same topology as in pmtu_ipv4, but issue a route replacement 194# command and delete the corresponding device afterward. This tests for 195# proper cleanup of the PMTU exceptions by the route replacement path. 196# Device unregistration should complete successfully 197# 198# - pmtu_ipv6_route_change 199# Same as above but with IPv6 200 201source lib.sh 202source net_helper.sh 203 204PAUSE_ON_FAIL=no 205VERBOSE=0 206TRACING=0 207 208# Some systems don't have a ping6 binary anymore 209which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) 210 211# Name Description re-run with nh 212tests=" 213 pmtu_ipv4_exception ipv4: PMTU exceptions 1 214 pmtu_ipv6_exception ipv6: PMTU exceptions 1 215 pmtu_ipv4_dscp_icmp_exception ICMPv4 with DSCP and ECN: PMTU exceptions 1 216 pmtu_ipv4_dscp_udp_exception UDPv4 with DSCP and ECN: PMTU exceptions 1 217 pmtu_ipv4_vxlan4_exception IPv4 over vxlan4: PMTU exceptions 1 218 pmtu_ipv6_vxlan4_exception IPv6 over vxlan4: PMTU exceptions 1 219 pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions 1 220 pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: PMTU exceptions 1 221 pmtu_ipv4_geneve4_exception IPv4 over geneve4: PMTU exceptions 1 222 pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions 1 223 pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions 1 224 pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions 1 225 pmtu_ipv4_br_vxlan4_exception IPv4, bridged vxlan4: PMTU exceptions 1 226 pmtu_ipv6_br_vxlan4_exception IPv6, bridged vxlan4: PMTU exceptions 1 227 pmtu_ipv4_br_vxlan6_exception IPv4, bridged vxlan6: PMTU exceptions 1 228 pmtu_ipv6_br_vxlan6_exception IPv6, bridged vxlan6: PMTU exceptions 1 229 pmtu_ipv4_br_geneve4_exception IPv4, bridged geneve4: PMTU exceptions 1 230 pmtu_ipv6_br_geneve4_exception IPv6, bridged geneve4: PMTU exceptions 1 231 pmtu_ipv4_br_geneve6_exception IPv4, bridged geneve6: PMTU exceptions 1 232 pmtu_ipv6_br_geneve6_exception IPv6, bridged geneve6: PMTU exceptions 1 233 pmtu_ipv4_ovs_vxlan4_exception IPv4, OVS vxlan4: PMTU exceptions 1 234 pmtu_ipv6_ovs_vxlan4_exception IPv6, OVS vxlan4: PMTU exceptions 1 235 pmtu_ipv4_ovs_vxlan6_exception IPv4, OVS vxlan6: PMTU exceptions 1 236 pmtu_ipv6_ovs_vxlan6_exception IPv6, OVS vxlan6: PMTU exceptions 1 237 pmtu_ipv4_ovs_geneve4_exception IPv4, OVS geneve4: PMTU exceptions 1 238 pmtu_ipv6_ovs_geneve4_exception IPv6, OVS geneve4: PMTU exceptions 1 239 pmtu_ipv4_ovs_geneve6_exception IPv4, OVS geneve6: PMTU exceptions 1 240 pmtu_ipv6_ovs_geneve6_exception IPv6, OVS geneve6: PMTU exceptions 1 241 pmtu_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions 1 242 pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions 1 243 pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions 1 244 pmtu_ipv6_fou6_exception IPv6 over fou6: PMTU exceptions 1 245 pmtu_ipv4_gue4_exception IPv4 over gue4: PMTU exceptions 1 246 pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions 1 247 pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions 1 248 pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions 1 249 pmtu_ipv4_ipv4_exception IPv4 over IPv4: PMTU exceptions 1 250 pmtu_ipv6_ipv4_exception IPv6 over IPv4: PMTU exceptions 1 251 pmtu_ipv4_ipv6_exception IPv4 over IPv6: PMTU exceptions 1 252 pmtu_ipv6_ipv6_exception IPv6 over IPv6: PMTU exceptions 1 253 pmtu_vti6_exception vti6: PMTU exceptions 0 254 pmtu_vti4_exception vti4: PMTU exceptions 0 255 pmtu_vti6_udp_exception vti6: PMTU exceptions (ESP-in-UDP) 0 256 pmtu_vti4_udp_exception vti4: PMTU exceptions (ESP-in-UDP) 0 257 pmtu_vti6_udp_routed_exception vti6: PMTU exceptions, routed (ESP-in-UDP) 0 258 pmtu_vti4_udp_routed_exception vti4: PMTU exceptions, routed (ESP-in-UDP) 0 259 pmtu_vti4_default_mtu vti4: default MTU assignment 0 260 pmtu_vti6_default_mtu vti6: default MTU assignment 0 261 pmtu_vti4_link_add_mtu vti4: MTU setting on link creation 0 262 pmtu_vti6_link_add_mtu vti6: MTU setting on link creation 0 263 pmtu_vti6_link_change_mtu vti6: MTU changes on link changes 0 264 cleanup_ipv4_exception ipv4: cleanup of cached exceptions 1 265 cleanup_ipv6_exception ipv6: cleanup of cached exceptions 1 266 list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 267 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 268 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 269 pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" 270 271# Addressing and routing for tests with routers: four network segments, with 272# index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an 273# identifier ID, which is 1 for hosts (A and B), 2 for routers (R1 and R2). 274# Addresses are: 275# - IPv4: PREFIX4.SEGMENT.ID (/24) 276# - IPv6: PREFIX6:SEGMENT::ID (/64) 277prefix4="10.0" 278prefix6="fc00" 279a_r1=1 280a_r2=2 281b_r1=3 282b_r2=4 283# ns peer segment 284routing_addrs=" 285 A R1 ${a_r1} 286 A R2 ${a_r2} 287 B R1 ${b_r1} 288 B R2 ${b_r2} 289" 290# Traffic from A to B goes through R1 by default, and through R2, if destined to 291# B's address on the b_r2 segment. 292# Traffic from B to A goes through R1. 293# ns destination gateway 294routes=" 295 A default ${prefix4}.${a_r1}.2 296 A ${prefix4}.${b_r2}.1 ${prefix4}.${a_r2}.2 297 B default ${prefix4}.${b_r1}.2 298 299 A default ${prefix6}:${a_r1}::2 300 A ${prefix6}:${b_r2}::1 ${prefix6}:${a_r2}::2 301 B default ${prefix6}:${b_r1}::2 302" 303USE_NH="no" 304# ns family nh id destination gateway 305nexthops=" 306 A 4 41 ${prefix4}.${a_r1}.2 veth_A-R1 307 A 4 42 ${prefix4}.${a_r2}.2 veth_A-R2 308 B 4 41 ${prefix4}.${b_r1}.2 veth_B-R1 309 310 A 6 61 ${prefix6}:${a_r1}::2 veth_A-R1 311 A 6 62 ${prefix6}:${a_r2}::2 veth_A-R2 312 B 6 61 ${prefix6}:${b_r1}::2 veth_B-R1 313" 314 315# nexthop id correlates to id in nexthops config above 316# ns family prefix nh id 317routes_nh=" 318 A 4 default 41 319 A 4 ${prefix4}.${b_r2}.1 42 320 B 4 default 41 321 322 A 6 default 61 323 A 6 ${prefix6}:${b_r2}::1 62 324 B 6 default 61 325" 326 327policy_mark=0x04 328rt_table=main 329 330veth4_a_addr="192.168.1.1" 331veth4_b_addr="192.168.1.2" 332veth4_c_addr="192.168.2.10" 333veth4_mask="24" 334veth6_a_addr="fd00:1::a" 335veth6_b_addr="fd00:1::b" 336veth6_c_addr="fd00:2::c" 337veth6_mask="64" 338 339tunnel4_a_addr="192.168.2.1" 340tunnel4_b_addr="192.168.2.2" 341tunnel4_mask="24" 342tunnel6_a_addr="fd00:2::a" 343tunnel6_b_addr="fd00:2::b" 344tunnel6_mask="64" 345 346dummy6_0_prefix="fc00:1000::" 347dummy6_1_prefix="fc00:1001::" 348dummy6_mask="64" 349 350err_buf= 351tcpdump_pids= 352nettest_pids= 353socat_pids= 354tmpoutfile= 355 356err() { 357 err_buf="${err_buf}${1} 358" 359} 360 361err_flush() { 362 echo -n "${err_buf}" 363 err_buf= 364} 365 366run_cmd() { 367 cmd="$*" 368 369 if [ "$VERBOSE" = "1" ]; then 370 printf " COMMAND: $cmd\n" 371 fi 372 373 out="$($cmd 2>&1)" 374 rc=$? 375 if [ "$VERBOSE" = "1" -a -n "$out" ]; then 376 echo " $out" 377 echo 378 fi 379 380 return $rc 381} 382 383run_cmd_bg() { 384 cmd="$*" 385 386 if [ "$VERBOSE" = "1" ]; then 387 printf " COMMAND: %s &\n" "${cmd}" 388 fi 389 390 $cmd 2>&1 & 391} 392 393# Find the auto-generated name for this namespace 394nsname() { 395 eval echo \$NS_$1 396} 397 398setup_fou_or_gue() { 399 outer="${1}" 400 inner="${2}" 401 encap="${3}" 402 403 if [ "${outer}" = "4" ]; then 404 modprobe fou || return $ksft_skip 405 a_addr="${prefix4}.${a_r1}.1" 406 b_addr="${prefix4}.${b_r1}.1" 407 if [ "${inner}" = "4" ]; then 408 type="ipip" 409 ipproto="4" 410 else 411 type="sit" 412 ipproto="41" 413 fi 414 else 415 modprobe fou6 || return $ksft_skip 416 a_addr="${prefix6}:${a_r1}::1" 417 b_addr="${prefix6}:${b_r1}::1" 418 if [ "${inner}" = "4" ]; then 419 type="ip6tnl" 420 mode="mode ipip6" 421 ipproto="4 -6" 422 else 423 type="ip6tnl" 424 mode="mode ip6ip6" 425 ipproto="41 -6" 426 fi 427 fi 428 429 run_cmd ${ns_a} ip fou add port 5555 ipproto ${ipproto} || return $ksft_skip 430 run_cmd ${ns_a} ip link add ${encap}_a type ${type} ${mode} local ${a_addr} remote ${b_addr} encap ${encap} encap-sport auto encap-dport 5556 || return $ksft_skip 431 432 run_cmd ${ns_b} ip fou add port 5556 ipproto ${ipproto} 433 run_cmd ${ns_b} ip link add ${encap}_b type ${type} ${mode} local ${b_addr} remote ${a_addr} encap ${encap} encap-sport auto encap-dport 5555 434 435 if [ "${inner}" = "4" ]; then 436 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${encap}_a 437 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${encap}_b 438 else 439 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${encap}_a 440 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${encap}_b 441 fi 442 443 run_cmd ${ns_a} ip link set ${encap}_a up 444 run_cmd ${ns_b} ip link set ${encap}_b up 445} 446 447setup_fou44() { 448 setup_fou_or_gue 4 4 fou 449} 450 451setup_fou46() { 452 setup_fou_or_gue 4 6 fou 453} 454 455setup_fou64() { 456 setup_fou_or_gue 6 4 fou 457} 458 459setup_fou66() { 460 setup_fou_or_gue 6 6 fou 461} 462 463setup_gue44() { 464 setup_fou_or_gue 4 4 gue 465} 466 467setup_gue46() { 468 setup_fou_or_gue 4 6 gue 469} 470 471setup_gue64() { 472 setup_fou_or_gue 6 4 gue 473} 474 475setup_gue66() { 476 setup_fou_or_gue 6 6 gue 477} 478 479setup_ipvX_over_ipvY() { 480 inner=${1} 481 outer=${2} 482 483 if [ "${outer}" -eq 4 ]; then 484 a_addr="${prefix4}.${a_r1}.1" 485 b_addr="${prefix4}.${b_r1}.1" 486 if [ "${inner}" -eq 4 ]; then 487 type="ipip" 488 mode="ipip" 489 else 490 type="sit" 491 mode="ip6ip" 492 fi 493 else 494 a_addr="${prefix6}:${a_r1}::1" 495 b_addr="${prefix6}:${b_r1}::1" 496 type="ip6tnl" 497 if [ "${inner}" -eq 4 ]; then 498 mode="ipip6" 499 else 500 mode="ip6ip6" 501 fi 502 fi 503 504 run_cmd ${ns_a} ip link add ip_a type ${type} local ${a_addr} remote ${b_addr} mode ${mode} || return $ksft_skip 505 run_cmd ${ns_b} ip link add ip_b type ${type} local ${b_addr} remote ${a_addr} mode ${mode} 506 507 run_cmd ${ns_a} ip link set ip_a up 508 run_cmd ${ns_b} ip link set ip_b up 509 510 if [ "${inner}" = "4" ]; then 511 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ip_a 512 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ip_b 513 else 514 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ip_a 515 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ip_b 516 fi 517} 518 519setup_ip4ip4() { 520 setup_ipvX_over_ipvY 4 4 521} 522 523setup_ip6ip4() { 524 setup_ipvX_over_ipvY 6 4 525} 526 527setup_ip4ip6() { 528 setup_ipvX_over_ipvY 4 6 529} 530 531setup_ip6ip6() { 532 setup_ipvX_over_ipvY 6 6 533} 534 535setup_namespaces() { 536 setup_ns NS_A NS_B NS_C NS_R1 NS_R2 537 for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do 538 # Disable DAD, so that we don't have to wait to use the 539 # configured IPv6 addresses 540 ip netns exec ${n} sysctl -q net/ipv6/conf/default/accept_dad=0 541 done 542 ns_a="ip netns exec ${NS_A}" 543 ns_b="ip netns exec ${NS_B}" 544 ns_c="ip netns exec ${NS_C}" 545 ns_r1="ip netns exec ${NS_R1}" 546 ns_r2="ip netns exec ${NS_R2}" 547} 548 549setup_veth() { 550 run_cmd ${ns_a} ip link add veth_a type veth peer name veth_b || return 1 551 run_cmd ${ns_a} ip link set veth_b netns ${NS_B} 552 553 run_cmd ${ns_a} ip addr add ${veth4_a_addr}/${veth4_mask} dev veth_a 554 run_cmd ${ns_b} ip addr add ${veth4_b_addr}/${veth4_mask} dev veth_b 555 556 run_cmd ${ns_a} ip addr add ${veth6_a_addr}/${veth6_mask} dev veth_a 557 run_cmd ${ns_b} ip addr add ${veth6_b_addr}/${veth6_mask} dev veth_b 558 559 run_cmd ${ns_a} ip link set veth_a up 560 run_cmd ${ns_b} ip link set veth_b up 561} 562 563setup_vti() { 564 proto=${1} 565 veth_a_addr="${2}" 566 veth_b_addr="${3}" 567 vti_a_addr="${4}" 568 vti_b_addr="${5}" 569 vti_mask=${6} 570 571 [ ${proto} -eq 6 ] && vti_type="vti6" || vti_type="vti" 572 573 run_cmd ${ns_a} ip link add vti${proto}_a type ${vti_type} local ${veth_a_addr} remote ${veth_b_addr} key 10 || return 1 574 run_cmd ${ns_b} ip link add vti${proto}_b type ${vti_type} local ${veth_b_addr} remote ${veth_a_addr} key 10 575 576 run_cmd ${ns_a} ip addr add ${vti_a_addr}/${vti_mask} dev vti${proto}_a 577 run_cmd ${ns_b} ip addr add ${vti_b_addr}/${vti_mask} dev vti${proto}_b 578 579 run_cmd ${ns_a} ip link set vti${proto}_a up 580 run_cmd ${ns_b} ip link set vti${proto}_b up 581} 582 583setup_vti4() { 584 setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 585} 586 587setup_vti6() { 588 setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 589} 590 591setup_vti4routed() { 592 setup_vti 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 593} 594 595setup_vti6routed() { 596 setup_vti 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 597} 598 599setup_vxlan_or_geneve() { 600 type="${1}" 601 a_addr="${2}" 602 b_addr="${3}" 603 opts="${4}" 604 br_if_a="${5}" 605 606 if [ "${type}" = "vxlan" ]; then 607 opts="${opts} ttl 64 dstport 4789" 608 opts_a="local ${a_addr}" 609 opts_b="local ${b_addr}" 610 else 611 opts_a="" 612 opts_b="" 613 fi 614 615 run_cmd ${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1 616 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} 617 618 if [ -n "${br_if_a}" ]; then 619 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${br_if_a} 620 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${br_if_a} 621 run_cmd ${ns_a} ip link set ${type}_a master ${br_if_a} 622 else 623 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a 624 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a 625 fi 626 627 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 628 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 629 630 run_cmd ${ns_a} ip link set ${type}_a up 631 run_cmd ${ns_b} ip link set ${type}_b up 632} 633 634setup_geneve4() { 635 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 636} 637 638setup_vxlan4() { 639 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 640} 641 642setup_geneve6() { 643 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 644} 645 646setup_vxlan6() { 647 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 648} 649 650setup_bridged_geneve4() { 651 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 652} 653 654setup_bridged_vxlan4() { 655 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 656} 657 658setup_bridged_geneve6() { 659 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 660} 661 662setup_bridged_vxlan6() { 663 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 664} 665 666setup_xfrm() { 667 proto=${1} 668 veth_a_addr="${2}" 669 veth_b_addr="${3}" 670 encap=${4} 671 672 run_cmd ${ns_a} ip -${proto} xfrm state add src ${veth_a_addr} dst ${veth_b_addr} spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode tunnel ${encap} || return 1 673 run_cmd ${ns_a} ip -${proto} xfrm state add src ${veth_b_addr} dst ${veth_a_addr} spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode tunnel ${encap} 674 run_cmd ${ns_a} ip -${proto} xfrm policy add dir out mark 10 tmpl src ${veth_a_addr} dst ${veth_b_addr} proto esp mode tunnel 675 run_cmd ${ns_a} ip -${proto} xfrm policy add dir in mark 10 tmpl src ${veth_b_addr} dst ${veth_a_addr} proto esp mode tunnel 676 677 run_cmd ${ns_b} ip -${proto} xfrm state add src ${veth_a_addr} dst ${veth_b_addr} spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode tunnel ${encap} 678 run_cmd ${ns_b} ip -${proto} xfrm state add src ${veth_b_addr} dst ${veth_a_addr} spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode tunnel ${encap} 679 run_cmd ${ns_b} ip -${proto} xfrm policy add dir out mark 10 tmpl src ${veth_b_addr} dst ${veth_a_addr} proto esp mode tunnel 680 run_cmd ${ns_b} ip -${proto} xfrm policy add dir in mark 10 tmpl src ${veth_a_addr} dst ${veth_b_addr} proto esp mode tunnel 681} 682 683setup_nettest_xfrm() { 684 if ! which nettest >/dev/null; then 685 PATH=$PWD:$PATH 686 if ! which nettest >/dev/null; then 687 echo "'nettest' command not found; skipping tests" 688 return 1 689 fi 690 fi 691 692 [ ${1} -eq 6 ] && proto="-6" || proto="" 693 port=${2} 694 695 run_cmd_bg "${ns_a}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5 696 nettest_pids="${nettest_pids} $!" 697 698 run_cmd_bg "${ns_b}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5 699 nettest_pids="${nettest_pids} $!" 700} 701 702setup_xfrm4() { 703 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} 704} 705 706setup_xfrm6() { 707 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} 708} 709 710setup_xfrm4udp() { 711 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} "encap espinudp 4500 4500 0.0.0.0" && \ 712 setup_nettest_xfrm 4 4500 713} 714 715setup_xfrm6udp() { 716 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} "encap espinudp 4500 4500 0.0.0.0" && \ 717 setup_nettest_xfrm 6 4500 718} 719 720setup_xfrm4udprouted() { 721 setup_xfrm 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "encap espinudp 4500 4500 0.0.0.0" && \ 722 setup_nettest_xfrm 4 4500 723} 724 725setup_xfrm6udprouted() { 726 setup_xfrm 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "encap espinudp 4500 4500 0.0.0.0" && \ 727 setup_nettest_xfrm 6 4500 728} 729 730setup_routing_old() { 731 for i in ${routes}; do 732 [ "${ns}" = "" ] && ns="${i}" && continue 733 [ "${addr}" = "" ] && addr="${i}" && continue 734 [ "${gw}" = "" ] && gw="${i}" 735 736 ns_name="$(nsname ${ns})" 737 738 ip -n "${ns_name}" route add "${addr}" table "${rt_table}" via "${gw}" 739 740 ns=""; addr=""; gw="" 741 done 742} 743 744setup_routing_new() { 745 for i in ${nexthops}; do 746 [ "${ns}" = "" ] && ns="${i}" && continue 747 [ "${fam}" = "" ] && fam="${i}" && continue 748 [ "${nhid}" = "" ] && nhid="${i}" && continue 749 [ "${gw}" = "" ] && gw="${i}" && continue 750 [ "${dev}" = "" ] && dev="${i}" 751 752 ns_name="$(nsname ${ns})" 753 754 ip -n ${ns_name} -${fam} nexthop add id ${nhid} via ${gw} dev ${dev} 755 756 ns=""; fam=""; nhid=""; gw=""; dev="" 757 758 done 759 760 for i in ${routes_nh}; do 761 [ "${ns}" = "" ] && ns="${i}" && continue 762 [ "${fam}" = "" ] && fam="${i}" && continue 763 [ "${addr}" = "" ] && addr="${i}" && continue 764 [ "${nhid}" = "" ] && nhid="${i}" 765 766 ns_name="$(nsname ${ns})" 767 768 ip -n "${ns_name}" -"${fam}" route add "${addr}" table "${rt_table}" nhid "${nhid}" 769 770 ns=""; fam=""; addr=""; nhid="" 771 done 772} 773 774setup_routing() { 775 for i in ${NS_R1} ${NS_R2}; do 776 ip netns exec ${i} sysctl -q net/ipv4/ip_forward=1 777 ip netns exec ${i} sysctl -q net/ipv6/conf/all/forwarding=1 778 done 779 780 for i in ${routing_addrs}; do 781 [ "${ns}" = "" ] && ns="${i}" && continue 782 [ "${peer}" = "" ] && peer="${i}" && continue 783 [ "${segment}" = "" ] && segment="${i}" 784 785 ns_name="$(nsname ${ns})" 786 peer_name="$(nsname ${peer})" 787 if="veth_${ns}-${peer}" 788 ifpeer="veth_${peer}-${ns}" 789 790 # Create veth links 791 ip link add ${if} up netns ${ns_name} type veth peer name ${ifpeer} netns ${peer_name} || return 1 792 ip -n ${peer_name} link set dev ${ifpeer} up 793 794 # Add addresses 795 ip -n ${ns_name} addr add ${prefix4}.${segment}.1/24 dev ${if} 796 ip -n ${ns_name} addr add ${prefix6}:${segment}::1/64 dev ${if} 797 798 ip -n ${peer_name} addr add ${prefix4}.${segment}.2/24 dev ${ifpeer} 799 ip -n ${peer_name} addr add ${prefix6}:${segment}::2/64 dev ${ifpeer} 800 801 ns=""; peer=""; segment="" 802 done 803 804 if [ "$USE_NH" = "yes" ]; then 805 setup_routing_new 806 else 807 setup_routing_old 808 fi 809 810 return 0 811} 812 813setup_policy_routing() { 814 setup_routing 815 816 ip -netns "${NS_A}" -4 rule add dsfield "${policy_mark}" \ 817 table "${rt_table}" 818 819 # Set the IPv4 Don't Fragment bit with tc, since socat doesn't seem to 820 # have an option do to it. 821 tc -netns "${NS_A}" qdisc replace dev veth_A-R1 root prio 822 tc -netns "${NS_A}" qdisc replace dev veth_A-R2 root prio 823 tc -netns "${NS_A}" filter add dev veth_A-R1 \ 824 protocol ipv4 flower ip_proto udp \ 825 action pedit ex munge ip df set 0x40 pipe csum ip and udp 826 tc -netns "${NS_A}" filter add dev veth_A-R2 \ 827 protocol ipv4 flower ip_proto udp \ 828 action pedit ex munge ip df set 0x40 pipe csum ip and udp 829} 830 831setup_bridge() { 832 run_cmd ${ns_a} ip link add br0 type bridge || return $ksft_skip 833 run_cmd ${ns_a} ip link set br0 up 834 835 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 836 run_cmd ${ns_c} ip link set veth_A-C netns ${NS_A} 837 838 run_cmd ${ns_a} ip link set veth_A-C up 839 run_cmd ${ns_c} ip link set veth_C-A up 840 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 841 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 842 run_cmd ${ns_a} ip link set veth_A-C master br0 843} 844 845setup_ovs_via_internal_utility() { 846 type="${1}" 847 a_addr="${2}" 848 b_addr="${3}" 849 dport="${4}" 850 851 run_cmd python3 ./openvswitch/ovs-dpctl.py add-if ovs_br0 ${type}_a -t ${type} || return 1 852 853 ports=$(python3 ./openvswitch/ovs-dpctl.py show) 854 br0_port=$(echo "$ports" | grep -E "\sovs_br0" | sed -e 's@port @@' | cut -d: -f1 | xargs) 855 type_a_port=$(echo "$ports" | grep ${type}_a | sed -e 's@port @@' | cut -d: -f1 | xargs) 856 veth_a_port=$(echo "$ports" | grep veth_A | sed -e 's@port @@' | cut -d: -f1 | xargs) 857 858 v4_a_tun="${prefix4}.${a_r1}.1" 859 v4_b_tun="${prefix4}.${b_r1}.1" 860 861 v6_a_tun="${prefix6}:${a_r1}::1" 862 v6_b_tun="${prefix6}:${b_r1}::1" 863 864 if [ "${v4_a_tun}" = "${a_addr}" ]; then 865 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 866 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0800),ipv4()" \ 867 "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 868 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 869 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x86dd),ipv6()" \ 870 "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 871 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 872 "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0800),ipv4()" \ 873 "${veth_a_port}" 874 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 875 "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x86dd),ipv6()" \ 876 "${veth_a_port}" 877 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 878 "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0806),arp()" \ 879 "${veth_a_port}" 880 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 881 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0806),arp(sip=${veth4_c_addr},tip=${tunnel4_b_addr})" \ 882 "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 883 else 884 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 885 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0800),ipv4()" \ 886 "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 887 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 888 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x86dd),ipv6()" \ 889 "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 890 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 891 "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0800),ipv4()" \ 892 "${veth_a_port}" 893 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 894 "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x86dd),ipv6()" \ 895 "${veth_a_port}" 896 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 897 "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0806),arp()" \ 898 "${veth_a_port}" 899 run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \ 900 "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0806),arp(sip=${veth4_c_addr},tip=${tunnel4_b_addr})" \ 901 "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}" 902 fi 903} 904 905setup_ovs_via_vswitchd() { 906 type="${1}" 907 b_addr="${2}" 908 909 run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \ 910 set interface ${type}_a type=${type} \ 911 options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1 912} 913 914setup_ovs_vxlan_or_geneve() { 915 type="${1}" 916 a_addr="${2}" 917 b_addr="${3}" 918 dport="6081" 919 920 if [ "${type}" = "vxlan" ]; then 921 dport="4789" 922 opts="${opts} ttl 64 dstport 4789" 923 opts_b="local ${b_addr}" 924 fi 925 926 setup_ovs_via_internal_utility "${type}" "${a_addr}" "${b_addr}" \ 927 "${dport}" || \ 928 setup_ovs_via_vswitchd "${type}" "${b_addr}" || return 1 929 930 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1 931 932 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 933 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 934 935 run_cmd ip link set ${type}_a up 936 run_cmd ${ns_b} ip link set ${type}_b up 937} 938 939setup_ovs_geneve4() { 940 setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 941} 942 943setup_ovs_vxlan4() { 944 setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 945} 946 947setup_ovs_geneve6() { 948 setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 949} 950 951setup_ovs_vxlan6() { 952 setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 953} 954 955setup_ovs_br_internal() { 956 run_cmd python3 ./openvswitch/ovs-dpctl.py add-dp ovs_br0 || \ 957 return 1 958} 959 960setup_ovs_br_vswitchd() { 961 run_cmd ovs-vsctl add-br ovs_br0 || return 1 962} 963 964setup_ovs_add_if() { 965 ifname="${1}" 966 run_cmd python3 ./openvswitch/ovs-dpctl.py add-if ovs_br0 \ 967 "${ifname}" || \ 968 run_cmd ovs-vsctl add-port ovs_br0 "${ifname}" 969} 970 971setup_ovs_bridge() { 972 setup_ovs_br_internal || setup_ovs_br_vswitchd || return $ksft_skip 973 run_cmd ip link set ovs_br0 up 974 975 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 976 run_cmd ${ns_c} ip link set veth_A-C netns 1 977 978 run_cmd ip link set veth_A-C up 979 run_cmd ${ns_c} ip link set veth_C-A up 980 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 981 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 982 setup_ovs_add_if veth_A-C 983 984 # Move veth_A-R1 to init 985 run_cmd ${ns_a} ip link set veth_A-R1 netns 1 986 run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1 987 run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1 988 run_cmd ip link set veth_A-R1 up 989 run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2 990 run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 991} 992 993setup() { 994 [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip 995 996 for arg do 997 eval setup_${arg} || { echo " ${arg} not supported"; return 1; } 998 done 999} 1000 1001trace() { 1002 [ $TRACING -eq 0 ] && return 1003 1004 for arg do 1005 [ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue 1006 ${ns_cmd} tcpdump --immediate-mode -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null & 1007 tcpdump_pids="${tcpdump_pids} $!" 1008 ns_cmd= 1009 done 1010 sleep 1 1011} 1012 1013cleanup_del_ovs_internal() { 1014 # squelch the output of the del-if commands since it can be wordy 1015 python3 ./openvswitch/ovs-dpctl.py del-if ovs_br0 -d true vxlan_a >/dev/null 2>&1 1016 python3 ./openvswitch/ovs-dpctl.py del-if ovs_br0 -d true geneve_a >/dev/null 2>&1 1017 python3 ./openvswitch/ovs-dpctl.py del-dp ovs_br0 >/dev/null 2>&1 1018} 1019 1020cleanup_del_ovs_vswitchd() { 1021 ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null 1022 ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null 1023} 1024 1025cleanup() { 1026 for pid in ${tcpdump_pids}; do 1027 kill ${pid} 1028 done 1029 tcpdump_pids= 1030 1031 for pid in ${nettest_pids}; do 1032 kill ${pid} 1033 done 1034 nettest_pids= 1035 1036 for pid in ${socat_pids}; do 1037 kill "${pid}" 1038 done 1039 socat_pids= 1040 1041 cleanup_all_ns 1042 1043 ip link del veth_A-C 2>/dev/null 1044 ip link del veth_A-R1 2>/dev/null 1045 cleanup_del_ovs_internal 1046 cleanup_del_ovs_vswitchd 1047 rm -f "$tmpoutfile" 1048} 1049 1050mtu() { 1051 ns_cmd="${1}" 1052 dev="${2}" 1053 mtu="${3}" 1054 1055 ${ns_cmd} ip link set dev ${dev} mtu ${mtu} 1056} 1057 1058mtu_parse() { 1059 input="${1}" 1060 1061 next=0 1062 for i in ${input}; do 1063 [ ${next} -eq 1 -a "${i}" = "lock" ] && next=2 && continue 1064 [ ${next} -eq 1 ] && echo "${i}" && return 1065 [ ${next} -eq 2 ] && echo "lock ${i}" && return 1066 [ "${i}" = "mtu" ] && next=1 1067 done 1068} 1069 1070link_get() { 1071 ns_cmd="${1}" 1072 name="${2}" 1073 1074 ${ns_cmd} ip link show dev "${name}" 1075} 1076 1077link_get_mtu() { 1078 ns_cmd="${1}" 1079 name="${2}" 1080 1081 mtu_parse "$(link_get "${ns_cmd}" ${name})" 1082} 1083 1084route_get_dst_exception() { 1085 ns_cmd="${1}" 1086 dst="${2}" 1087 dsfield="${3}" 1088 1089 if [ -z "${dsfield}" ]; then 1090 dsfield=0 1091 fi 1092 1093 ${ns_cmd} ip route get "${dst}" dsfield "${dsfield}" 1094} 1095 1096route_get_dst_pmtu_from_exception() { 1097 ns_cmd="${1}" 1098 dst="${2}" 1099 dsfield="${3}" 1100 1101 mtu_parse "$(route_get_dst_exception "${ns_cmd}" "${dst}" "${dsfield}")" 1102} 1103 1104check_pmtu_value() { 1105 expected="${1}" 1106 value="${2}" 1107 event="${3}" 1108 1109 [ "${expected}" = "any" ] && [ -n "${value}" ] && return 0 1110 [ "${value}" = "${expected}" ] && return 0 1111 [ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1 1112 [ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1 1113 err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}" 1114 return 1 1115} 1116 1117test_pmtu_ipvX() { 1118 family=${1} 1119 1120 setup namespaces routing || return $ksft_skip 1121 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1122 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1123 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1124 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1125 1126 if [ ${family} -eq 4 ]; then 1127 ping=ping 1128 dst1="${prefix4}.${b_r1}.1" 1129 dst2="${prefix4}.${b_r2}.1" 1130 else 1131 ping=${ping6} 1132 dst1="${prefix6}:${b_r1}::1" 1133 dst2="${prefix6}:${b_r2}::1" 1134 fi 1135 1136 # Set up initial MTU values 1137 mtu "${ns_a}" veth_A-R1 2000 1138 mtu "${ns_r1}" veth_R1-A 2000 1139 mtu "${ns_r1}" veth_R1-B 1400 1140 mtu "${ns_b}" veth_B-R1 1400 1141 1142 mtu "${ns_a}" veth_A-R2 2000 1143 mtu "${ns_r2}" veth_R2-A 2000 1144 mtu "${ns_r2}" veth_R2-B 1500 1145 mtu "${ns_b}" veth_B-R2 1500 1146 1147 # Create route exceptions 1148 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 1149 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 1150 1151 # Check that exceptions have been created with the correct PMTU 1152 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1153 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1154 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1155 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1156 1157 # Decrease local MTU below PMTU, check for PMTU decrease in route exception 1158 mtu "${ns_a}" veth_A-R1 1300 1159 mtu "${ns_r1}" veth_R1-A 1300 1160 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1161 check_pmtu_value "1300" "${pmtu_1}" "decreasing local MTU" || return 1 1162 # Second exception shouldn't be modified 1163 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1164 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1165 1166 # Increase MTU, check for PMTU increase in route exception 1167 mtu "${ns_a}" veth_A-R1 1700 1168 mtu "${ns_r1}" veth_R1-A 1700 1169 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1170 check_pmtu_value "1700" "${pmtu_1}" "increasing local MTU" || return 1 1171 # Second exception shouldn't be modified 1172 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1173 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1174 1175 # Skip PMTU locking tests for IPv6 1176 [ $family -eq 6 ] && return 0 1177 1178 # Decrease remote MTU on path via R2, get new exception 1179 mtu "${ns_r2}" veth_R2-B 400 1180 mtu "${ns_b}" veth_B-R2 400 1181 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1182 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1183 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1184 1185 # Decrease local MTU below PMTU 1186 mtu "${ns_a}" veth_A-R2 500 1187 mtu "${ns_r2}" veth_R2-A 500 1188 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1189 check_pmtu_value "500" "${pmtu_2}" "decreasing local MTU" || return 1 1190 1191 # Increase local MTU 1192 mtu "${ns_a}" veth_A-R2 1500 1193 mtu "${ns_r2}" veth_R2-A 1500 1194 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1195 check_pmtu_value "1500" "${pmtu_2}" "increasing local MTU" || return 1 1196 1197 # Get new exception 1198 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1199 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1200 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1201} 1202 1203test_pmtu_ipv4_exception() { 1204 test_pmtu_ipvX 4 1205} 1206 1207test_pmtu_ipv6_exception() { 1208 test_pmtu_ipvX 6 1209} 1210 1211test_pmtu_ipv4_dscp_icmp_exception() { 1212 rt_table=100 1213 1214 setup namespaces policy_routing || return $ksft_skip 1215 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1216 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1217 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1218 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1219 1220 # Set up initial MTU values 1221 mtu "${ns_a}" veth_A-R1 2000 1222 mtu "${ns_r1}" veth_R1-A 2000 1223 mtu "${ns_r1}" veth_R1-B 1400 1224 mtu "${ns_b}" veth_B-R1 1400 1225 1226 mtu "${ns_a}" veth_A-R2 2000 1227 mtu "${ns_r2}" veth_R2-A 2000 1228 mtu "${ns_r2}" veth_R2-B 1500 1229 mtu "${ns_b}" veth_B-R2 1500 1230 1231 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1232 1233 dst1="${prefix4}.${b_r1}.1" 1234 dst2="${prefix4}.${b_r2}.1" 1235 1236 # Create route exceptions 1237 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1238 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst1}" 1239 1240 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1241 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}" 1242 1243 # Check that exceptions have been created with the correct PMTU 1244 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" 1245 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1246 1247 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" 1248 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1249} 1250 1251test_pmtu_ipv4_dscp_udp_exception() { 1252 rt_table=100 1253 1254 if ! which socat > /dev/null 2>&1; then 1255 echo "'socat' command not found; skipping tests" 1256 return $ksft_skip 1257 fi 1258 1259 setup namespaces policy_routing || return $ksft_skip 1260 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1261 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1262 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1263 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1264 1265 # Set up initial MTU values 1266 mtu "${ns_a}" veth_A-R1 2000 1267 mtu "${ns_r1}" veth_R1-A 2000 1268 mtu "${ns_r1}" veth_R1-B 1400 1269 mtu "${ns_b}" veth_B-R1 1400 1270 1271 mtu "${ns_a}" veth_A-R2 2000 1272 mtu "${ns_r2}" veth_R2-A 2000 1273 mtu "${ns_r2}" veth_R2-B 1500 1274 mtu "${ns_b}" veth_B-R2 1500 1275 1276 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1277 1278 dst1="${prefix4}.${b_r1}.1" 1279 dst2="${prefix4}.${b_r2}.1" 1280 1281 # Create route exceptions 1282 run_cmd_bg "${ns_b}" socat UDP-LISTEN:50000 OPEN:/dev/null,wronly=1 1283 socat_pids="${socat_pids} $!" 1284 1285 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1286 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1287 UDP:"${dst1}":50000,tos="${dsfield}" 1288 1289 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1290 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1291 UDP:"${dst2}":50000,tos="${dsfield}" 1292 1293 # Check that exceptions have been created with the correct PMTU 1294 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" 1295 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1296 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" 1297 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1298} 1299 1300test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() { 1301 type=${1} 1302 family=${2} 1303 outer_family=${3} 1304 ll_mtu=4000 1305 1306 if [ ${outer_family} -eq 4 ]; then 1307 setup namespaces routing ${type}4 || return $ksft_skip 1308 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1309 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1310 else 1311 setup namespaces routing ${type}6 || return $ksft_skip 1312 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1313 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1314 fi 1315 1316 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1317 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1318 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1319 1320 if [ ${family} -eq 4 ]; then 1321 ping=ping 1322 dst=${tunnel4_b_addr} 1323 else 1324 ping=${ping6} 1325 dst=${tunnel6_b_addr} 1326 fi 1327 1328 # Create route exception by exceeding link layer MTU 1329 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1330 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1331 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1332 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1333 1334 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1335 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1336 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1337 1338 # Check that exception was created 1339 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1340 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface" 1341} 1342 1343test_pmtu_ipv4_vxlan4_exception() { 1344 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4 1345} 1346 1347test_pmtu_ipv6_vxlan4_exception() { 1348 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4 1349} 1350 1351test_pmtu_ipv4_geneve4_exception() { 1352 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4 1353} 1354 1355test_pmtu_ipv6_geneve4_exception() { 1356 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4 1357} 1358 1359test_pmtu_ipv4_vxlan6_exception() { 1360 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6 1361} 1362 1363test_pmtu_ipv6_vxlan6_exception() { 1364 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6 1365} 1366 1367test_pmtu_ipv4_geneve6_exception() { 1368 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6 1369} 1370 1371test_pmtu_ipv6_geneve6_exception() { 1372 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6 1373} 1374 1375test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() { 1376 type=${1} 1377 family=${2} 1378 outer_family=${3} 1379 ll_mtu=4000 1380 1381 if [ ${outer_family} -eq 4 ]; then 1382 setup namespaces routing bridge bridged_${type}4 || return $ksft_skip 1383 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1384 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1385 else 1386 setup namespaces routing bridge bridged_${type}6 || return $ksft_skip 1387 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1388 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1389 fi 1390 1391 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1392 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1393 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1394 "${ns_a}" br0 "${ns_a}" veth-A-C \ 1395 "${ns_c}" veth_C-A 1396 1397 if [ ${family} -eq 4 ]; then 1398 ping=ping 1399 dst=${tunnel4_b_addr} 1400 else 1401 ping=${ping6} 1402 dst=${tunnel6_b_addr} 1403 fi 1404 1405 # Create route exception by exceeding link layer MTU 1406 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1407 mtu "${ns_a}" br0 $((${ll_mtu} + 1000)) 1408 mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000)) 1409 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1410 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1411 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1412 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1413 1414 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1415 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1416 1417 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1 1418 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1 1419 1420 # Check that exceptions were created 1421 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1422 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface" 1423 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1424 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface" 1425 1426 tmpoutfile=$(mktemp) 1427 1428 # Flush Exceptions, retry with TCP 1429 run_cmd ${ns_a} ip route flush cached ${dst} 1430 run_cmd ${ns_b} ip route flush cached ${dst} 1431 run_cmd ${ns_c} ip route flush cached ${dst} 1432 1433 for target in "${ns_a}" "${ns_c}" ; do 1434 if [ ${family} -eq 4 ]; then 1435 TCPDST=TCP:${dst}:50000 1436 else 1437 TCPDST="TCP:[${dst}]:50000" 1438 fi 1439 ${ns_b} socat -T 3 -u -6 TCP-LISTEN:50000,reuseaddr STDOUT > $tmpoutfile & 1440 local socat_pid=$! 1441 1442 wait_local_port_listen ${NS_B} 50000 tcp 1443 1444 dd if=/dev/zero status=none bs=1M count=1 | ${target} socat -T 3 -u STDIN $TCPDST,connect-timeout=3 1445 1446 wait ${socat_pid} 1447 size=$(du -sb $tmpoutfile) 1448 size=${size%%/tmp/*} 1449 1450 [ $size -ne 1048576 ] && err "File size $size mismatches exepcted value in locally bridged vxlan test" && return 1 1451 done 1452 1453 rm -f "$tmpoutfile" 1454 1455 # Check that exceptions were created 1456 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1457 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp: exceeding link layer MTU on bridged ${type} interface" 1458 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1459 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp exceeding link layer MTU on locally bridged ${type} interface" 1460} 1461 1462test_pmtu_ipv4_br_vxlan4_exception() { 1463 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4 1464} 1465 1466test_pmtu_ipv6_br_vxlan4_exception() { 1467 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4 1468} 1469 1470test_pmtu_ipv4_br_geneve4_exception() { 1471 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4 1472} 1473 1474test_pmtu_ipv6_br_geneve4_exception() { 1475 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4 1476} 1477 1478test_pmtu_ipv4_br_vxlan6_exception() { 1479 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6 1480} 1481 1482test_pmtu_ipv6_br_vxlan6_exception() { 1483 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6 1484} 1485 1486test_pmtu_ipv4_br_geneve6_exception() { 1487 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6 1488} 1489 1490test_pmtu_ipv6_br_geneve6_exception() { 1491 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6 1492} 1493 1494test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() { 1495 type=${1} 1496 family=${2} 1497 outer_family=${3} 1498 ll_mtu=4000 1499 1500 if [ "${type}" = "vxlan" ]; then 1501 tun_a="vxlan_sys_4789" 1502 elif [ "${type}" = "geneve" ]; then 1503 tun_a="genev_sys_6081" 1504 fi 1505 1506 if [ ${outer_family} -eq 4 ]; then 1507 setup namespaces routing ovs_bridge ovs_${type}4 || return $ksft_skip 1508 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1509 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1510 else 1511 setup namespaces routing ovs_bridge ovs_${type}6 || return $ksft_skip 1512 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1513 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1514 fi 1515 1516 trace "" ${type}_a "${ns_b}" ${type}_b \ 1517 "" veth_A-R1 "${ns_r1}" veth_R1-A \ 1518 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1519 "" ovs_br0 "" veth-A_C \ 1520 "${ns_c}" veth_C-A "" "${tun_a}" 1521 1522 if [ ${family} -eq 4 ]; then 1523 ping=ping 1524 dst=${tunnel4_b_addr} 1525 else 1526 ping=${ping6} 1527 dst=${tunnel6_b_addr} 1528 fi 1529 1530 # Create route exception by exceeding link layer MTU 1531 mtu "" veth_A-R1 $((${ll_mtu} + 1000)) 1532 mtu "" ovs_br0 $((${ll_mtu} + 1000)) 1533 mtu "" veth_A-C $((${ll_mtu} + 1000)) 1534 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1535 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1536 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1537 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1538 1539 mtu "" ${tun_a} $((${ll_mtu} + 1000)) 2>/dev/null || \ 1540 mtu "" ${type}_a $((${ll_mtu} + 1000)) 2>/dev/null 1541 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1542 1543 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1 1544 1545 # Check that exceptions were created 1546 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1547 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface" 1548} 1549 1550test_pmtu_ipv4_ovs_vxlan4_exception() { 1551 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4 1552} 1553 1554test_pmtu_ipv6_ovs_vxlan4_exception() { 1555 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4 1556} 1557 1558test_pmtu_ipv4_ovs_geneve4_exception() { 1559 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4 1560} 1561 1562test_pmtu_ipv6_ovs_geneve4_exception() { 1563 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4 1564} 1565 1566test_pmtu_ipv4_ovs_vxlan6_exception() { 1567 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6 1568} 1569 1570test_pmtu_ipv6_ovs_vxlan6_exception() { 1571 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6 1572} 1573 1574test_pmtu_ipv4_ovs_geneve6_exception() { 1575 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6 1576} 1577 1578test_pmtu_ipv6_ovs_geneve6_exception() { 1579 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6 1580} 1581 1582test_pmtu_ipvX_over_fouY_or_gueY() { 1583 inner_family=${1} 1584 outer_family=${2} 1585 encap=${3} 1586 ll_mtu=4000 1587 1588 setup namespaces routing ${encap}${outer_family}${inner_family} || return $ksft_skip 1589 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1590 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1591 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1592 1593 if [ ${inner_family} -eq 4 ]; then 1594 ping=ping 1595 dst=${tunnel4_b_addr} 1596 else 1597 ping=${ping6} 1598 dst=${tunnel6_b_addr} 1599 fi 1600 1601 if [ "${encap}" = "gue" ]; then 1602 encap_overhead=4 1603 else 1604 encap_overhead=0 1605 fi 1606 1607 if [ ${outer_family} -eq 4 ]; then 1608 # IPv4 header UDP header 1609 exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead})) 1610 else 1611 # IPv6 header Option 4 UDP header 1612 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead})) 1613 fi 1614 1615 # Create route exception by exceeding link layer MTU 1616 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1617 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1618 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1619 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1620 1621 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1622 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1623 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1624 1625 # Check that exception was created 1626 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1627 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${encap} interface" 1628} 1629 1630test_pmtu_ipv4_fou4_exception() { 1631 test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou 1632} 1633 1634test_pmtu_ipv6_fou4_exception() { 1635 test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou 1636} 1637 1638test_pmtu_ipv4_fou6_exception() { 1639 test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou 1640} 1641 1642test_pmtu_ipv6_fou6_exception() { 1643 test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou 1644} 1645 1646test_pmtu_ipv4_gue4_exception() { 1647 test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue 1648} 1649 1650test_pmtu_ipv6_gue4_exception() { 1651 test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue 1652} 1653 1654test_pmtu_ipv4_gue6_exception() { 1655 test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue 1656} 1657 1658test_pmtu_ipv6_gue6_exception() { 1659 test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue 1660} 1661 1662test_pmtu_ipvX_over_ipvY_exception() { 1663 inner=${1} 1664 outer=${2} 1665 ll_mtu=4000 1666 1667 setup namespaces routing ip${inner}ip${outer} || return $ksft_skip 1668 1669 trace "${ns_a}" ip_a "${ns_b}" ip_b \ 1670 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1671 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1672 1673 if [ ${inner} -eq 4 ]; then 1674 ping=ping 1675 dst=${tunnel4_b_addr} 1676 else 1677 ping=${ping6} 1678 dst=${tunnel6_b_addr} 1679 fi 1680 1681 if [ ${outer} -eq 4 ]; then 1682 # IPv4 header 1683 exp_mtu=$((${ll_mtu} - 20)) 1684 else 1685 # IPv6 header Option 4 1686 exp_mtu=$((${ll_mtu} - 40 - 8)) 1687 fi 1688 1689 # Create route exception by exceeding link layer MTU 1690 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1691 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1692 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1693 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1694 1695 mtu "${ns_a}" ip_a $((${ll_mtu} + 1000)) || return 1696 mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return 1697 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1698 1699 # Check that exception was created 1700 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1701 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface" 1702} 1703 1704test_pmtu_ipv4_ipv4_exception() { 1705 test_pmtu_ipvX_over_ipvY_exception 4 4 1706} 1707 1708test_pmtu_ipv6_ipv4_exception() { 1709 test_pmtu_ipvX_over_ipvY_exception 6 4 1710} 1711 1712test_pmtu_ipv4_ipv6_exception() { 1713 test_pmtu_ipvX_over_ipvY_exception 4 6 1714} 1715 1716test_pmtu_ipv6_ipv6_exception() { 1717 test_pmtu_ipvX_over_ipvY_exception 6 6 1718} 1719 1720test_pmtu_vti4_exception() { 1721 setup namespaces veth vti4 xfrm4 || return $ksft_skip 1722 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1723 "${ns_a}" vti4_a "${ns_b}" vti4_b 1724 1725 veth_mtu=1500 1726 vti_mtu=$((veth_mtu - 20)) 1727 1728 # SPI SN IV ICV pad length next header 1729 esp_payload_rfc4106=$((vti_mtu - 4 - 4 - 8 - 16 - 1 - 1)) 1730 ping_payload=$((esp_payload_rfc4106 - 28)) 1731 1732 mtu "${ns_a}" veth_a ${veth_mtu} 1733 mtu "${ns_b}" veth_b ${veth_mtu} 1734 mtu "${ns_a}" vti4_a ${vti_mtu} 1735 mtu "${ns_b}" vti4_b ${vti_mtu} 1736 1737 # Send DF packet without exceeding link layer MTU, check that no 1738 # exception is created 1739 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1740 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1741 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1742 1743 # Now exceed link layer MTU by one byte, check that exception is created 1744 # with the right PMTU value 1745 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1746 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1747 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1748} 1749 1750test_pmtu_vti6_exception() { 1751 setup namespaces veth vti6 xfrm6 || return $ksft_skip 1752 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1753 "${ns_a}" vti6_a "${ns_b}" vti6_b 1754 fail=0 1755 1756 # Create route exception by exceeding link layer MTU 1757 mtu "${ns_a}" veth_a 4000 1758 mtu "${ns_b}" veth_b 4000 1759 mtu "${ns_a}" vti6_a 5000 1760 mtu "${ns_b}" vti6_b 5000 1761 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1762 1763 # Check that exception was created 1764 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1765 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1766 1767 # Decrease tunnel MTU, check for PMTU decrease in route exception 1768 mtu "${ns_a}" vti6_a 3000 1769 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1770 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1771 1772 # Increase tunnel MTU, check for PMTU increase in route exception 1773 mtu "${ns_a}" vti6_a 9000 1774 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1775 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1776 1777 return ${fail} 1778} 1779 1780test_pmtu_vti4_udp_exception() { 1781 setup namespaces veth vti4 xfrm4udp || return $ksft_skip 1782 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1783 "${ns_a}" vti4_a "${ns_b}" vti4_b 1784 1785 veth_mtu=1500 1786 vti_mtu=$((veth_mtu - 20)) 1787 1788 # UDP SPI SN IV ICV pad length next header 1789 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1790 ping_payload=$((esp_payload_rfc4106 - 28)) 1791 1792 mtu "${ns_a}" veth_a ${veth_mtu} 1793 mtu "${ns_b}" veth_b ${veth_mtu} 1794 mtu "${ns_a}" vti4_a ${vti_mtu} 1795 mtu "${ns_b}" vti4_b ${vti_mtu} 1796 1797 # Send DF packet without exceeding link layer MTU, check that no 1798 # exception is created 1799 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1800 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1801 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1802 1803 # Now exceed link layer MTU by one byte, check that exception is created 1804 # with the right PMTU value 1805 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1806 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1807 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1808} 1809 1810test_pmtu_vti6_udp_exception() { 1811 setup namespaces veth vti6 xfrm6udp || return $ksft_skip 1812 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1813 "${ns_a}" vti6_a "${ns_b}" vti6_b 1814 fail=0 1815 1816 # Create route exception by exceeding link layer MTU 1817 mtu "${ns_a}" veth_a 4000 1818 mtu "${ns_b}" veth_b 4000 1819 mtu "${ns_a}" vti6_a 5000 1820 mtu "${ns_b}" vti6_b 5000 1821 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1822 1823 # Check that exception was created 1824 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1825 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1826 1827 # Decrease tunnel MTU, check for PMTU decrease in route exception 1828 mtu "${ns_a}" vti6_a 3000 1829 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1830 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1831 1832 # Increase tunnel MTU, check for PMTU increase in route exception 1833 mtu "${ns_a}" vti6_a 9000 1834 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1835 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1836 1837 return ${fail} 1838} 1839 1840test_pmtu_vti4_udp_routed_exception() { 1841 setup namespaces routing vti4routed xfrm4udprouted || return $ksft_skip 1842 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1843 "${ns_a}" vti4_a "${ns_b}" vti4_b 1844 1845 veth_mtu=1500 1846 vti_mtu=$((veth_mtu - 20)) 1847 1848 # UDP SPI SN IV ICV pad length next header 1849 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1850 ping_payload=$((esp_payload_rfc4106 - 28)) 1851 1852 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1853 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1854 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1855 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1856 1857 mtu "${ns_a}" vti4_a ${vti_mtu} 1858 mtu "${ns_b}" vti4_b ${vti_mtu} 1859 1860 # Send DF packet without exceeding link layer MTU, check that no 1861 # exception is created 1862 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1863 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1864 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1865 1866 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1867 # with the right PMTU value 1868 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1869 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel4_b_addr} 1870 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1871 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1872} 1873 1874test_pmtu_vti6_udp_routed_exception() { 1875 setup namespaces routing vti6routed xfrm6udprouted || return $ksft_skip 1876 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1877 "${ns_a}" vti6_a "${ns_b}" vti6_b 1878 1879 veth_mtu=1500 1880 vti_mtu=$((veth_mtu - 40)) 1881 1882 # UDP SPI SN IV ICV pad length next header 1883 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1884 ping_payload=$((esp_payload_rfc4106 - 48)) 1885 1886 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1887 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1888 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1889 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1890 1891 # mtu "${ns_a}" vti6_a ${vti_mtu} 1892 # mtu "${ns_b}" vti6_b ${vti_mtu} 1893 1894 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel6_b_addr} 1895 1896 # Check that exception was not created 1897 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1898 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1899 1900 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1901 # with the right PMTU value 1902 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1903 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel6_b_addr} 1904 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1905 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1906 1907} 1908 1909test_pmtu_vti4_default_mtu() { 1910 setup namespaces veth vti4 || return $ksft_skip 1911 1912 # Check that MTU of vti device is MTU of veth minus IPv4 header length 1913 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1914 vti4_mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1915 if [ $((veth_mtu - vti4_mtu)) -ne 20 ]; then 1916 err " vti MTU ${vti4_mtu} is not veth MTU ${veth_mtu} minus IPv4 header length" 1917 return 1 1918 fi 1919} 1920 1921test_pmtu_vti6_default_mtu() { 1922 setup namespaces veth vti6 || return $ksft_skip 1923 1924 # Check that MTU of vti device is MTU of veth minus IPv6 header length 1925 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1926 vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1927 if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then 1928 err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length" 1929 return 1 1930 fi 1931} 1932 1933test_pmtu_vti4_link_add_mtu() { 1934 setup namespaces || return $ksft_skip 1935 1936 run_cmd ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1937 [ $? -ne 0 ] && err " vti not supported" && return $ksft_skip 1938 run_cmd ${ns_a} ip link del vti4_a 1939 1940 fail=0 1941 1942 min=68 1943 max=$((65535 - 20)) 1944 # Check invalid values first 1945 for v in $((min - 1)) $((max + 1)); do 1946 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1947 # This can fail, or MTU can be adjusted to a proper value 1948 [ $? -ne 0 ] && continue 1949 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1950 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1951 err " vti tunnel created with invalid MTU ${mtu}" 1952 fail=1 1953 fi 1954 run_cmd ${ns_a} ip link del vti4_a 1955 done 1956 1957 # Now check valid values 1958 for v in ${min} 1300 ${max}; do 1959 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1960 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1961 run_cmd ${ns_a} ip link del vti4_a 1962 if [ "${mtu}" != "${v}" ]; then 1963 err " vti MTU ${mtu} doesn't match configured value ${v}" 1964 fail=1 1965 fi 1966 done 1967 1968 return ${fail} 1969} 1970 1971test_pmtu_vti6_link_add_mtu() { 1972 setup namespaces || return $ksft_skip 1973 1974 run_cmd ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1975 [ $? -ne 0 ] && err " vti6 not supported" && return $ksft_skip 1976 run_cmd ${ns_a} ip link del vti6_a 1977 1978 fail=0 1979 1980 min=68 # vti6 can carry IPv4 packets too 1981 max=$((65535 - 40)) 1982 # Check invalid values first 1983 for v in $((min - 1)) $((max + 1)); do 1984 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1985 # This can fail, or MTU can be adjusted to a proper value 1986 [ $? -ne 0 ] && continue 1987 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1988 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1989 err " vti6 tunnel created with invalid MTU ${v}" 1990 fail=1 1991 fi 1992 run_cmd ${ns_a} ip link del vti6_a 1993 done 1994 1995 # Now check valid values 1996 for v in 68 1280 1300 $((65535 - 40)); do 1997 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1998 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1999 run_cmd ${ns_a} ip link del vti6_a 2000 if [ "${mtu}" != "${v}" ]; then 2001 err " vti6 MTU ${mtu} doesn't match configured value ${v}" 2002 fail=1 2003 fi 2004 done 2005 2006 return ${fail} 2007} 2008 2009test_pmtu_vti6_link_change_mtu() { 2010 setup namespaces || return $ksft_skip 2011 2012 run_cmd ${ns_a} ip link add dummy0 mtu 1500 type dummy 2013 [ $? -ne 0 ] && err " dummy not supported" && return $ksft_skip 2014 run_cmd ${ns_a} ip link add dummy1 mtu 3000 type dummy 2015 run_cmd ${ns_a} ip link set dummy0 up 2016 run_cmd ${ns_a} ip link set dummy1 up 2017 2018 run_cmd ${ns_a} ip addr add ${dummy6_0_prefix}1/${dummy6_mask} dev dummy0 2019 run_cmd ${ns_a} ip addr add ${dummy6_1_prefix}1/${dummy6_mask} dev dummy1 2020 2021 fail=0 2022 2023 # Create vti6 interface bound to device, passing MTU, check it 2024 run_cmd ${ns_a} ip link add vti6_a mtu 1300 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 2025 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 2026 if [ ${mtu} -ne 1300 ]; then 2027 err " vti6 MTU ${mtu} doesn't match configured value 1300" 2028 fail=1 2029 fi 2030 2031 # Move to another device with different MTU, without passing MTU, check 2032 # MTU is adjusted 2033 run_cmd ${ns_a} ip link set vti6_a type vti6 remote ${dummy6_1_prefix}2 local ${dummy6_1_prefix}1 2034 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 2035 if [ ${mtu} -ne $((3000 - 40)) ]; then 2036 err " vti MTU ${mtu} is not dummy MTU 3000 minus IPv6 header length" 2037 fail=1 2038 fi 2039 2040 # Move it back, passing MTU, check MTU is not overridden 2041 run_cmd ${ns_a} ip link set vti6_a mtu 1280 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 2042 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 2043 if [ ${mtu} -ne 1280 ]; then 2044 err " vti6 MTU ${mtu} doesn't match configured value 1280" 2045 fail=1 2046 fi 2047 2048 return ${fail} 2049} 2050 2051check_command() { 2052 cmd=${1} 2053 2054 if ! which ${cmd} > /dev/null 2>&1; then 2055 err " missing required command: '${cmd}'" 2056 return 1 2057 fi 2058 return 0 2059} 2060 2061check_running() { 2062 pid=${1} 2063 cmd=${2} 2064 2065 [ "$(cat /proc/${pid}/cmdline 2>/dev/null | tr -d '\0')" = "{cmd}" ] 2066} 2067 2068test_cleanup_vxlanX_exception() { 2069 outer="${1}" 2070 encap="vxlan" 2071 ll_mtu=4000 2072 2073 check_command taskset || return $ksft_skip 2074 cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) 2075 2076 setup namespaces routing ${encap}${outer} || return $ksft_skip 2077 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 2078 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2079 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 2080 2081 # Create route exception by exceeding link layer MTU 2082 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 2083 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 2084 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 2085 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 2086 2087 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 2088 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 2089 2090 # Fill exception cache for multiple CPUs (2) 2091 # we can always use inner IPv4 for that 2092 for cpu in ${cpu_list}; do 2093 run_cmd taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr} 2094 done 2095 2096 ${ns_a} ip link del dev veth_A-R1 & 2097 iplink_pid=$! 2098 for i in $(seq 1 20); do 2099 check_running ${iplink_pid} "iplinkdeldevveth_A-R1" || return 0 2100 sleep 0.1 2101 done 2102 err " can't delete veth device in a timely manner, PMTU dst likely leaked" 2103 return 1 2104} 2105 2106test_cleanup_ipv6_exception() { 2107 test_cleanup_vxlanX_exception 6 2108} 2109 2110test_cleanup_ipv4_exception() { 2111 test_cleanup_vxlanX_exception 4 2112} 2113 2114run_test() { 2115 ( 2116 tname="$1" 2117 tdesc="$2" 2118 2119 unset IFS 2120 2121 # Since cleanup() relies on variables modified by this subshell, it 2122 # has to run in this context. 2123 trap cleanup EXIT 2124 2125 if [ "$VERBOSE" = "1" ]; then 2126 printf "\n##########################################################################\n\n" 2127 fi 2128 2129 eval test_${tname} 2130 ret=$? 2131 2132 if [ $ret -eq 0 ]; then 2133 printf "TEST: %-60s [ OK ]\n" "${tdesc}" 2134 elif [ $ret -eq 1 ]; then 2135 printf "TEST: %-60s [FAIL]\n" "${tdesc}" 2136 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 2137 echo 2138 echo "Pausing. Hit enter to continue" 2139 read a 2140 fi 2141 err_flush 2142 exit 1 2143 elif [ $ret -eq $ksft_skip ]; then 2144 printf "TEST: %-60s [SKIP]\n" "${tdesc}" 2145 err_flush 2146 fi 2147 2148 return $ret 2149 ) 2150 ret=$? 2151 case $ret in 2152 0) 2153 all_skipped=false 2154 [ $exitcode -eq $ksft_skip ] && exitcode=0 2155 ;; 2156 $ksft_skip) 2157 [ $all_skipped = true ] && exitcode=$ksft_skip 2158 ;; 2159 *) 2160 all_skipped=false 2161 exitcode=1 2162 ;; 2163 esac 2164 2165 return $ret 2166} 2167 2168run_test_nh() { 2169 tname="$1" 2170 tdesc="$2" 2171 2172 USE_NH=yes 2173 run_test "${tname}" "${tdesc} - nexthop objects" 2174 USE_NH=no 2175} 2176 2177test_list_flush_ipv4_exception() { 2178 setup namespaces routing || return $ksft_skip 2179 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2180 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2181 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2182 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2183 2184 dst_prefix1="${prefix4}.${b_r1}." 2185 dst2="${prefix4}.${b_r2}.1" 2186 2187 # Set up initial MTU values 2188 mtu "${ns_a}" veth_A-R1 2000 2189 mtu "${ns_r1}" veth_R1-A 2000 2190 mtu "${ns_r1}" veth_R1-B 1500 2191 mtu "${ns_b}" veth_B-R1 1500 2192 2193 mtu "${ns_a}" veth_A-R2 2000 2194 mtu "${ns_r2}" veth_R2-A 2000 2195 mtu "${ns_r2}" veth_R2-B 1500 2196 mtu "${ns_b}" veth_B-R2 1500 2197 2198 fail=0 2199 2200 # Add 100 addresses for veth endpoint on B reached by default A route 2201 for i in $(seq 100 199); do 2202 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2203 done 2204 2205 # Create 100 cached route exceptions for path via R1, one via R2. Note 2206 # that with IPv4 we need to actually cause a route lookup that matches 2207 # the exception caused by ICMP, in order to actually have a cached 2208 # route, so we need to ping each destination twice 2209 for i in $(seq 100 199); do 2210 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}" 2211 done 2212 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}" 2213 2214 if [ "$(${ns_a} ip -oneline route list cache | wc -l)" -ne 101 ]; then 2215 err " can't list cached exceptions" 2216 fail=1 2217 fi 2218 2219 run_cmd ${ns_a} ip route flush cache 2220 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)" 2221 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)" 2222 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2223 [ -n "$(${ns_a} ip route list cache)" ]; then 2224 err " can't flush cached exceptions" 2225 fail=1 2226 fi 2227 2228 return ${fail} 2229} 2230 2231test_list_flush_ipv6_exception() { 2232 setup namespaces routing || return $ksft_skip 2233 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2234 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2235 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2236 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2237 2238 dst_prefix1="${prefix6}:${b_r1}::" 2239 dst2="${prefix6}:${b_r2}::1" 2240 2241 # Set up initial MTU values 2242 mtu "${ns_a}" veth_A-R1 2000 2243 mtu "${ns_r1}" veth_R1-A 2000 2244 mtu "${ns_r1}" veth_R1-B 1500 2245 mtu "${ns_b}" veth_B-R1 1500 2246 2247 mtu "${ns_a}" veth_A-R2 2000 2248 mtu "${ns_r2}" veth_R2-A 2000 2249 mtu "${ns_r2}" veth_R2-B 1500 2250 mtu "${ns_b}" veth_B-R2 1500 2251 2252 fail=0 2253 2254 # Add 100 addresses for veth endpoint on B reached by default A route 2255 for i in $(seq 100 199); do 2256 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2257 done 2258 2259 # Create 100 cached route exceptions for path via R1, one via R2 2260 for i in $(seq 100 199); do 2261 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}" 2262 done 2263 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}" 2264 if [ "$(${ns_a} ip -oneline -6 route list cache | wc -l)" -ne 101 ]; then 2265 err " can't list cached exceptions" 2266 fail=1 2267 fi 2268 2269 run_cmd ${ns_a} ip -6 route flush cache 2270 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")" 2271 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2272 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2273 [ -n "$(${ns_a} ip -6 route list cache)" ]; then 2274 err " can't flush cached exceptions" 2275 fail=1 2276 fi 2277 2278 return ${fail} 2279} 2280 2281test_pmtu_ipvX_route_change() { 2282 family=${1} 2283 2284 setup namespaces routing || return 2 2285 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2286 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2287 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2288 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2289 2290 if [ ${family} -eq 4 ]; then 2291 ping=ping 2292 dst1="${prefix4}.${b_r1}.1" 2293 dst2="${prefix4}.${b_r2}.1" 2294 gw="${prefix4}.${a_r1}.2" 2295 else 2296 ping=${ping6} 2297 dst1="${prefix6}:${b_r1}::1" 2298 dst2="${prefix6}:${b_r2}::1" 2299 gw="${prefix6}:${a_r1}::2" 2300 fi 2301 2302 # Set up initial MTU values 2303 mtu "${ns_a}" veth_A-R1 2000 2304 mtu "${ns_r1}" veth_R1-A 2000 2305 mtu "${ns_r1}" veth_R1-B 1400 2306 mtu "${ns_b}" veth_B-R1 1400 2307 2308 mtu "${ns_a}" veth_A-R2 2000 2309 mtu "${ns_r2}" veth_R2-A 2000 2310 mtu "${ns_r2}" veth_R2-B 1500 2311 mtu "${ns_b}" veth_B-R2 1500 2312 2313 # Create route exceptions 2314 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 2315 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 2316 2317 # Check that exceptions have been created with the correct PMTU 2318 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 2319 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 2320 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2321 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 2322 2323 # Replace the route from A to R1 2324 run_cmd ${ns_a} ip route change default via ${gw} 2325 2326 # Delete the device in A 2327 run_cmd ${ns_a} ip link del "veth_A-R1" 2328} 2329 2330test_pmtu_ipv4_route_change() { 2331 test_pmtu_ipvX_route_change 4 2332} 2333 2334test_pmtu_ipv6_route_change() { 2335 test_pmtu_ipvX_route_change 6 2336} 2337 2338usage() { 2339 echo 2340 echo "$0 [OPTIONS] [TEST]..." 2341 echo "If no TEST argument is given, all tests will be run." 2342 echo 2343 echo "Options" 2344 echo " --trace: capture traffic to TEST_INTERFACE.pcap" 2345 echo 2346 echo "Available tests${tests}" 2347 exit 1 2348} 2349 2350################################################################################ 2351# 2352exitcode=0 2353desc=0 2354all_skipped=true 2355 2356while getopts :ptv o 2357do 2358 case $o in 2359 p) PAUSE_ON_FAIL=yes;; 2360 v) VERBOSE=1;; 2361 t) if which tcpdump > /dev/null 2>&1; then 2362 TRACING=1 2363 else 2364 echo "=== tcpdump not available, tracing disabled" 2365 fi 2366 ;; 2367 *) usage;; 2368 esac 2369done 2370shift $(($OPTIND-1)) 2371 2372IFS=" 2373" 2374 2375for arg do 2376 # Check first that all requested tests are available before running any 2377 command -v > /dev/null "test_${arg}" || { echo "=== Test ${arg} not found"; usage; } 2378done 2379 2380trap cleanup EXIT 2381 2382# start clean 2383cleanup 2384 2385HAVE_NH=no 2386ip nexthop ls >/dev/null 2>&1 2387[ $? -eq 0 ] && HAVE_NH=yes 2388 2389name="" 2390desc="" 2391rerun_nh=0 2392for t in ${tests}; do 2393 [ "${name}" = "" ] && name="${t}" && continue 2394 [ "${desc}" = "" ] && desc="${t}" && continue 2395 2396 if [ "${HAVE_NH}" = "yes" ]; then 2397 rerun_nh="${t}" 2398 fi 2399 2400 run_this=1 2401 for arg do 2402 [ "${arg}" != "${arg#--*}" ] && continue 2403 [ "${arg}" = "${name}" ] && run_this=1 && break 2404 run_this=0 2405 done 2406 if [ $run_this -eq 1 ]; then 2407 run_test "${name}" "${desc}" 2408 # if test was skipped no need to retry with nexthop objects 2409 [ $? -eq $ksft_skip ] && rerun_nh=0 2410 2411 if [ "${rerun_nh}" = "1" ]; then 2412 run_test_nh "${name}" "${desc}" 2413 fi 2414 fi 2415 name="" 2416 desc="" 2417 rerun_nh=0 2418done 2419 2420exit ${exitcode} 2421