1#!/bin/sh 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_vxlan4_exception 30# Set up the same network topology as pmtu_ipv4, create a VXLAN tunnel 31# over IPv4 between A and B, routed via R1. On the link between R1 and B, 32# set a MTU lower than the VXLAN MTU and the MTU on the link between A and 33# R1. Send IPv4 packets, exceeding the MTU between R1 and B, over VXLAN 34# from A to B and check that the PMTU exception is created with the right 35# value on A 36# 37# - pmtu_ipv6_vxlan4_exception 38# Same as pmtu_ipv4_vxlan4_exception, but send IPv6 packets from A to B 39# 40# - pmtu_ipv4_vxlan6_exception 41# Same as pmtu_ipv4_vxlan4_exception, but use IPv6 transport from A to B 42# 43# - pmtu_ipv6_vxlan6_exception 44# Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B 45# 46# - pmtu_ipv4_geneve4_exception 47# Same as pmtu_ipv4_vxlan4_exception, but using a GENEVE tunnel instead of 48# VXLAN 49# 50# - pmtu_ipv6_geneve4_exception 51# Same as pmtu_ipv6_vxlan4_exception, but using a GENEVE tunnel instead of 52# VXLAN 53# 54# - pmtu_ipv4_geneve6_exception 55# Same as pmtu_ipv4_vxlan6_exception, but using a GENEVE tunnel instead of 56# VXLAN 57# 58# - pmtu_ipv6_geneve6_exception 59# Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of 60# VXLAN 61# 62# - pmtu_ipv{4,6}_br_vxlan{4,6}_exception 63# Set up three namespaces, A, B, and C, with routing between A and B over 64# R1. R2 is unused in these tests. A has a veth connection to C, and is 65# connected to B via a VXLAN endpoint, which is directly bridged to C. 66# MTU on the B-R1 link is lower than other MTUs. 67# 68# Check that both C and A are able to communicate with B over the VXLAN 69# tunnel, and that PMTU exceptions with the correct values are created. 70# 71# segment a_r1 segment b_r1 b_r1: 4000 72# .--------------R1--------------. everything 73# C---veth A B else: 5000 74# ' bridge | 75# '---- - - - - - VXLAN - - - - - - - ' 76# 77# - pmtu_ipv{4,6}_br_geneve{4,6}_exception 78# Same as pmtu_ipv{4,6}_br_vxlan{4,6}_exception, with a GENEVE tunnel 79# instead. 80# 81# - pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception 82# Set up two namespaces, B, and C, with routing between the init namespace 83# and B over R1. A and R2 are unused in these tests. The init namespace 84# has a veth connection to C, and is connected to B via a VXLAN endpoint, 85# which is handled by Open vSwitch and bridged to C. MTU on the B-R1 link 86# is lower than other MTUs. 87# 88# Check that C is able to communicate with B over the VXLAN tunnel, and 89# that PMTU exceptions with the correct values are created. 90# 91# segment a_r1 segment b_r1 b_r1: 4000 92# .--------------R1--------------. everything 93# C---veth init B else: 5000 94# '- ovs | 95# '---- - - - - - VXLAN - - - - - - - ' 96# 97# - pmtu_ipv{4,6}_ovs_geneve{4,6}_exception 98# Same as pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception, with a GENEVE tunnel 99# instead. 100# 101# - pmtu_ipv{4,6}_fou{4,6}_exception 102# Same as pmtu_ipv4_vxlan4, but using a direct IPv4/IPv6 encapsulation 103# (FoU) over IPv4/IPv6, instead of VXLAN 104# 105# - pmtu_ipv{4,6}_fou{4,6}_exception 106# Same as pmtu_ipv4_vxlan4, but using a generic UDP IPv4/IPv6 107# encapsulation (GUE) over IPv4/IPv6, instead of VXLAN 108# 109# - pmtu_ipv{4,6}_ipv{4,6}_exception 110# Same as pmtu_ipv4_vxlan4, but using a IPv4/IPv6 tunnel over IPv4/IPv6, 111# instead of VXLAN 112# 113# - pmtu_vti4_exception 114# Set up vti tunnel on top of veth, with xfrm states and policies, in two 115# namespaces with matching endpoints. Check that route exception is not 116# created if link layer MTU is not exceeded, then exceed it and check that 117# exception is created with the expected PMTU. The approach described 118# below for IPv6 doesn't apply here, because, on IPv4, administrative MTU 119# changes alone won't affect PMTU 120# 121# - pmtu_vti4_udp_exception 122# Same as pmtu_vti4_exception, but using ESP-in-UDP 123# 124# - pmtu_vti4_udp_routed_exception 125# Set up vti tunnel on top of veth connected through routing namespace and 126# add xfrm states and policies with ESP-in-UDP encapsulation. Check that 127# route exception is not created if link layer MTU is not exceeded, then 128# lower MTU on second part of routed environment and check that exception 129# is created with the expected PMTU. 130# 131# - pmtu_vti6_exception 132# Set up vti6 tunnel on top of veth, with xfrm states and policies, in two 133# namespaces with matching endpoints. Check that route exception is 134# created by exceeding link layer MTU with ping to other endpoint. Then 135# decrease and increase MTU of tunnel, checking that route exception PMTU 136# changes accordingly 137# 138# - pmtu_vti6_udp_exception 139# Same as pmtu_vti6_exception, but using ESP-in-UDP 140# 141# - pmtu_vti6_udp_routed_exception 142# Same as pmtu_vti6_udp_routed_exception but with routing between vti 143# endpoints 144# 145# - pmtu_vti4_default_mtu 146# Set up vti4 tunnel on top of veth, in two namespaces with matching 147# endpoints. Check that MTU assigned to vti interface is the MTU of the 148# lower layer (veth) minus additional lower layer headers (zero, for veth) 149# minus IPv4 header length 150# 151# - pmtu_vti6_default_mtu 152# Same as above, for IPv6 153# 154# - pmtu_vti4_link_add_mtu 155# Set up vti4 interface passing MTU value at link creation, check MTU is 156# configured, and that link is not created with invalid MTU values 157# 158# - pmtu_vti6_link_add_mtu 159# Same as above, for IPv6 160# 161# - pmtu_vti6_link_change_mtu 162# Set up two dummy interfaces with different MTUs, create a vti6 tunnel 163# and check that configured MTU is used on link creation and changes, and 164# that MTU is properly calculated instead when MTU is not configured from 165# userspace 166# 167# - cleanup_ipv4_exception 168# Similar to pmtu_ipv4_vxlan4_exception, but explicitly generate PMTU 169# exceptions on multiple CPUs and check that the veth device tear-down 170# happens in a timely manner 171# 172# - cleanup_ipv6_exception 173# Same as above, but use IPv6 transport from A to B 174# 175# - list_flush_ipv4_exception 176# Using the same topology as in pmtu_ipv4, create exceptions, and check 177# they are shown when listing exception caches, gone after flushing them 178# 179# - list_flush_ipv6_exception 180# Using the same topology as in pmtu_ipv6, create exceptions, and check 181# they are shown when listing exception caches, gone after flushing them 182# 183# - pmtu_ipv4_route_change 184# Use the same topology as in pmtu_ipv4, but issue a route replacement 185# command and delete the corresponding device afterward. This tests for 186# proper cleanup of the PMTU exceptions by the route replacement path. 187# Device unregistration should complete successfully 188# 189# - pmtu_ipv6_route_change 190# Same as above but with IPv6 191 192# Kselftest framework requirement - SKIP code is 4. 193ksft_skip=4 194 195PAUSE_ON_FAIL=no 196VERBOSE=0 197TRACING=0 198 199# Some systems don't have a ping6 binary anymore 200which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) 201 202# Name Description re-run with nh 203tests=" 204 pmtu_ipv4_exception ipv4: PMTU exceptions 1 205 pmtu_ipv6_exception ipv6: PMTU exceptions 1 206 pmtu_ipv4_vxlan4_exception IPv4 over vxlan4: PMTU exceptions 1 207 pmtu_ipv6_vxlan4_exception IPv6 over vxlan4: PMTU exceptions 1 208 pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions 1 209 pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: PMTU exceptions 1 210 pmtu_ipv4_geneve4_exception IPv4 over geneve4: PMTU exceptions 1 211 pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions 1 212 pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions 1 213 pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions 1 214 pmtu_ipv4_br_vxlan4_exception IPv4, bridged vxlan4: PMTU exceptions 1 215 pmtu_ipv6_br_vxlan4_exception IPv6, bridged vxlan4: PMTU exceptions 1 216 pmtu_ipv4_br_vxlan6_exception IPv4, bridged vxlan6: PMTU exceptions 1 217 pmtu_ipv6_br_vxlan6_exception IPv6, bridged vxlan6: PMTU exceptions 1 218 pmtu_ipv4_br_geneve4_exception IPv4, bridged geneve4: PMTU exceptions 1 219 pmtu_ipv6_br_geneve4_exception IPv6, bridged geneve4: PMTU exceptions 1 220 pmtu_ipv4_br_geneve6_exception IPv4, bridged geneve6: PMTU exceptions 1 221 pmtu_ipv6_br_geneve6_exception IPv6, bridged geneve6: PMTU exceptions 1 222 pmtu_ipv4_ovs_vxlan4_exception IPv4, OVS vxlan4: PMTU exceptions 1 223 pmtu_ipv6_ovs_vxlan4_exception IPv6, OVS vxlan4: PMTU exceptions 1 224 pmtu_ipv4_ovs_vxlan6_exception IPv4, OVS vxlan6: PMTU exceptions 1 225 pmtu_ipv6_ovs_vxlan6_exception IPv6, OVS vxlan6: PMTU exceptions 1 226 pmtu_ipv4_ovs_geneve4_exception IPv4, OVS geneve4: PMTU exceptions 1 227 pmtu_ipv6_ovs_geneve4_exception IPv6, OVS geneve4: PMTU exceptions 1 228 pmtu_ipv4_ovs_geneve6_exception IPv4, OVS geneve6: PMTU exceptions 1 229 pmtu_ipv6_ovs_geneve6_exception IPv6, OVS geneve6: PMTU exceptions 1 230 pmtu_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions 1 231 pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions 1 232 pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions 1 233 pmtu_ipv6_fou6_exception IPv6 over fou6: PMTU exceptions 1 234 pmtu_ipv4_gue4_exception IPv4 over gue4: PMTU exceptions 1 235 pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions 1 236 pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions 1 237 pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions 1 238 pmtu_ipv4_ipv4_exception IPv4 over IPv4: PMTU exceptions 1 239 pmtu_ipv6_ipv4_exception IPv6 over IPv4: PMTU exceptions 1 240 pmtu_ipv4_ipv6_exception IPv4 over IPv6: PMTU exceptions 1 241 pmtu_ipv6_ipv6_exception IPv6 over IPv6: PMTU exceptions 1 242 pmtu_vti6_exception vti6: PMTU exceptions 0 243 pmtu_vti4_exception vti4: PMTU exceptions 0 244 pmtu_vti6_udp_exception vti6: PMTU exceptions (ESP-in-UDP) 0 245 pmtu_vti4_udp_exception vti4: PMTU exceptions (ESP-in-UDP) 0 246 pmtu_vti6_udp_routed_exception vti6: PMTU exceptions, routed (ESP-in-UDP) 0 247 pmtu_vti4_udp_routed_exception vti4: PMTU exceptions, routed (ESP-in-UDP) 0 248 pmtu_vti4_default_mtu vti4: default MTU assignment 0 249 pmtu_vti6_default_mtu vti6: default MTU assignment 0 250 pmtu_vti4_link_add_mtu vti4: MTU setting on link creation 0 251 pmtu_vti6_link_add_mtu vti6: MTU setting on link creation 0 252 pmtu_vti6_link_change_mtu vti6: MTU changes on link changes 0 253 cleanup_ipv4_exception ipv4: cleanup of cached exceptions 1 254 cleanup_ipv6_exception ipv6: cleanup of cached exceptions 1 255 list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 256 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 257 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 258 pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" 259 260NS_A="ns-A" 261NS_B="ns-B" 262NS_C="ns-C" 263NS_R1="ns-R1" 264NS_R2="ns-R2" 265ns_a="ip netns exec ${NS_A}" 266ns_b="ip netns exec ${NS_B}" 267ns_c="ip netns exec ${NS_C}" 268ns_r1="ip netns exec ${NS_R1}" 269ns_r2="ip netns exec ${NS_R2}" 270# Addressing and routing for tests with routers: four network segments, with 271# index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an 272# identifier ID, which is 1 for hosts (A and B), 2 for routers (R1 and R2). 273# Addresses are: 274# - IPv4: PREFIX4.SEGMENT.ID (/24) 275# - IPv6: PREFIX6:SEGMENT::ID (/64) 276prefix4="10.0" 277prefix6="fc00" 278a_r1=1 279a_r2=2 280b_r1=3 281b_r2=4 282# ns peer segment 283routing_addrs=" 284 A R1 ${a_r1} 285 A R2 ${a_r2} 286 B R1 ${b_r1} 287 B R2 ${b_r2} 288" 289# Traffic from A to B goes through R1 by default, and through R2, if destined to 290# B's address on the b_r2 segment. 291# Traffic from B to A goes through R1. 292# ns destination gateway 293routes=" 294 A default ${prefix4}.${a_r1}.2 295 A ${prefix4}.${b_r2}.1 ${prefix4}.${a_r2}.2 296 B default ${prefix4}.${b_r1}.2 297 298 A default ${prefix6}:${a_r1}::2 299 A ${prefix6}:${b_r2}::1 ${prefix6}:${a_r2}::2 300 B default ${prefix6}:${b_r1}::2 301" 302USE_NH="no" 303# ns family nh id destination gateway 304nexthops=" 305 A 4 41 ${prefix4}.${a_r1}.2 veth_A-R1 306 A 4 42 ${prefix4}.${a_r2}.2 veth_A-R2 307 B 4 41 ${prefix4}.${b_r1}.2 veth_B-R1 308 309 A 6 61 ${prefix6}:${a_r1}::2 veth_A-R1 310 A 6 62 ${prefix6}:${a_r2}::2 veth_A-R2 311 B 6 61 ${prefix6}:${b_r1}::2 veth_B-R1 312" 313 314# nexthop id correlates to id in nexthops config above 315# ns family prefix nh id 316routes_nh=" 317 A 4 default 41 318 A 4 ${prefix4}.${b_r2}.1 42 319 B 4 default 41 320 321 A 6 default 61 322 A 6 ${prefix6}:${b_r2}::1 62 323 B 6 default 61 324" 325 326veth4_a_addr="192.168.1.1" 327veth4_b_addr="192.168.1.2" 328veth4_c_addr="192.168.2.10" 329veth4_mask="24" 330veth6_a_addr="fd00:1::a" 331veth6_b_addr="fd00:1::b" 332veth6_c_addr="fd00:2::c" 333veth6_mask="64" 334 335tunnel4_a_addr="192.168.2.1" 336tunnel4_b_addr="192.168.2.2" 337tunnel4_mask="24" 338tunnel6_a_addr="fd00:2::a" 339tunnel6_b_addr="fd00:2::b" 340tunnel6_mask="64" 341 342dummy6_0_prefix="fc00:1000::" 343dummy6_1_prefix="fc00:1001::" 344dummy6_mask="64" 345 346err_buf= 347tcpdump_pids= 348nettest_pids= 349 350err() { 351 err_buf="${err_buf}${1} 352" 353} 354 355err_flush() { 356 echo -n "${err_buf}" 357 err_buf= 358} 359 360run_cmd() { 361 cmd="$*" 362 363 if [ "$VERBOSE" = "1" ]; then 364 printf " COMMAND: $cmd\n" 365 fi 366 367 out="$($cmd 2>&1)" 368 rc=$? 369 if [ "$VERBOSE" = "1" -a -n "$out" ]; then 370 echo " $out" 371 echo 372 fi 373 374 return $rc 375} 376 377# Find the auto-generated name for this namespace 378nsname() { 379 eval echo \$NS_$1 380} 381 382setup_fou_or_gue() { 383 outer="${1}" 384 inner="${2}" 385 encap="${3}" 386 387 if [ "${outer}" = "4" ]; then 388 modprobe fou || return $ksft_skip 389 a_addr="${prefix4}.${a_r1}.1" 390 b_addr="${prefix4}.${b_r1}.1" 391 if [ "${inner}" = "4" ]; then 392 type="ipip" 393 ipproto="4" 394 else 395 type="sit" 396 ipproto="41" 397 fi 398 else 399 modprobe fou6 || return $ksft_skip 400 a_addr="${prefix6}:${a_r1}::1" 401 b_addr="${prefix6}:${b_r1}::1" 402 if [ "${inner}" = "4" ]; then 403 type="ip6tnl" 404 mode="mode ipip6" 405 ipproto="4 -6" 406 else 407 type="ip6tnl" 408 mode="mode ip6ip6" 409 ipproto="41 -6" 410 fi 411 fi 412 413 run_cmd ${ns_a} ip fou add port 5555 ipproto ${ipproto} || return $ksft_skip 414 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 415 416 run_cmd ${ns_b} ip fou add port 5556 ipproto ${ipproto} 417 run_cmd ${ns_b} ip link add ${encap}_b type ${type} ${mode} local ${b_addr} remote ${a_addr} encap ${encap} encap-sport auto encap-dport 5555 418 419 if [ "${inner}" = "4" ]; then 420 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${encap}_a 421 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${encap}_b 422 else 423 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${encap}_a 424 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${encap}_b 425 fi 426 427 run_cmd ${ns_a} ip link set ${encap}_a up 428 run_cmd ${ns_b} ip link set ${encap}_b up 429} 430 431setup_fou44() { 432 setup_fou_or_gue 4 4 fou 433} 434 435setup_fou46() { 436 setup_fou_or_gue 4 6 fou 437} 438 439setup_fou64() { 440 setup_fou_or_gue 6 4 fou 441} 442 443setup_fou66() { 444 setup_fou_or_gue 6 6 fou 445} 446 447setup_gue44() { 448 setup_fou_or_gue 4 4 gue 449} 450 451setup_gue46() { 452 setup_fou_or_gue 4 6 gue 453} 454 455setup_gue64() { 456 setup_fou_or_gue 6 4 gue 457} 458 459setup_gue66() { 460 setup_fou_or_gue 6 6 gue 461} 462 463setup_ipvX_over_ipvY() { 464 inner=${1} 465 outer=${2} 466 467 if [ "${outer}" -eq 4 ]; then 468 a_addr="${prefix4}.${a_r1}.1" 469 b_addr="${prefix4}.${b_r1}.1" 470 if [ "${inner}" -eq 4 ]; then 471 type="ipip" 472 mode="ipip" 473 else 474 type="sit" 475 mode="ip6ip" 476 fi 477 else 478 a_addr="${prefix6}:${a_r1}::1" 479 b_addr="${prefix6}:${b_r1}::1" 480 type="ip6tnl" 481 if [ "${inner}" -eq 4 ]; then 482 mode="ipip6" 483 else 484 mode="ip6ip6" 485 fi 486 fi 487 488 run_cmd ${ns_a} ip link add ip_a type ${type} local ${a_addr} remote ${b_addr} mode ${mode} || return $ksft_skip 489 run_cmd ${ns_b} ip link add ip_b type ${type} local ${b_addr} remote ${a_addr} mode ${mode} 490 491 run_cmd ${ns_a} ip link set ip_a up 492 run_cmd ${ns_b} ip link set ip_b up 493 494 if [ "${inner}" = "4" ]; then 495 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ip_a 496 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ip_b 497 else 498 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ip_a 499 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ip_b 500 fi 501} 502 503setup_ip4ip4() { 504 setup_ipvX_over_ipvY 4 4 505} 506 507setup_ip6ip4() { 508 setup_ipvX_over_ipvY 6 4 509} 510 511setup_ip4ip6() { 512 setup_ipvX_over_ipvY 4 6 513} 514 515setup_ip6ip6() { 516 setup_ipvX_over_ipvY 6 6 517} 518 519setup_namespaces() { 520 for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do 521 ip netns add ${n} || return 1 522 523 # Disable DAD, so that we don't have to wait to use the 524 # configured IPv6 addresses 525 ip netns exec ${n} sysctl -q net/ipv6/conf/default/accept_dad=0 526 done 527} 528 529setup_veth() { 530 run_cmd ${ns_a} ip link add veth_a type veth peer name veth_b || return 1 531 run_cmd ${ns_a} ip link set veth_b netns ${NS_B} 532 533 run_cmd ${ns_a} ip addr add ${veth4_a_addr}/${veth4_mask} dev veth_a 534 run_cmd ${ns_b} ip addr add ${veth4_b_addr}/${veth4_mask} dev veth_b 535 536 run_cmd ${ns_a} ip addr add ${veth6_a_addr}/${veth6_mask} dev veth_a 537 run_cmd ${ns_b} ip addr add ${veth6_b_addr}/${veth6_mask} dev veth_b 538 539 run_cmd ${ns_a} ip link set veth_a up 540 run_cmd ${ns_b} ip link set veth_b up 541} 542 543setup_vti() { 544 proto=${1} 545 veth_a_addr="${2}" 546 veth_b_addr="${3}" 547 vti_a_addr="${4}" 548 vti_b_addr="${5}" 549 vti_mask=${6} 550 551 [ ${proto} -eq 6 ] && vti_type="vti6" || vti_type="vti" 552 553 run_cmd ${ns_a} ip link add vti${proto}_a type ${vti_type} local ${veth_a_addr} remote ${veth_b_addr} key 10 || return 1 554 run_cmd ${ns_b} ip link add vti${proto}_b type ${vti_type} local ${veth_b_addr} remote ${veth_a_addr} key 10 555 556 run_cmd ${ns_a} ip addr add ${vti_a_addr}/${vti_mask} dev vti${proto}_a 557 run_cmd ${ns_b} ip addr add ${vti_b_addr}/${vti_mask} dev vti${proto}_b 558 559 run_cmd ${ns_a} ip link set vti${proto}_a up 560 run_cmd ${ns_b} ip link set vti${proto}_b up 561} 562 563setup_vti4() { 564 setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 565} 566 567setup_vti6() { 568 setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 569} 570 571setup_vti4routed() { 572 setup_vti 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 573} 574 575setup_vti6routed() { 576 setup_vti 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 577} 578 579setup_vxlan_or_geneve() { 580 type="${1}" 581 a_addr="${2}" 582 b_addr="${3}" 583 opts="${4}" 584 br_if_a="${5}" 585 586 if [ "${type}" = "vxlan" ]; then 587 opts="${opts} ttl 64 dstport 4789" 588 opts_a="local ${a_addr}" 589 opts_b="local ${b_addr}" 590 else 591 opts_a="" 592 opts_b="" 593 fi 594 595 run_cmd ${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1 596 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} 597 598 if [ -n "${br_if_a}" ]; then 599 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${br_if_a} 600 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${br_if_a} 601 run_cmd ${ns_a} ip link set ${type}_a master ${br_if_a} 602 else 603 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a 604 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a 605 fi 606 607 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 608 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 609 610 run_cmd ${ns_a} ip link set ${type}_a up 611 run_cmd ${ns_b} ip link set ${type}_b up 612} 613 614setup_geneve4() { 615 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 616} 617 618setup_vxlan4() { 619 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 620} 621 622setup_geneve6() { 623 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 624} 625 626setup_vxlan6() { 627 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 628} 629 630setup_bridged_geneve4() { 631 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 632} 633 634setup_bridged_vxlan4() { 635 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 636} 637 638setup_bridged_geneve6() { 639 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 640} 641 642setup_bridged_vxlan6() { 643 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 644} 645 646setup_xfrm() { 647 proto=${1} 648 veth_a_addr="${2}" 649 veth_b_addr="${3}" 650 encap=${4} 651 652 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 1 653 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} 654 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 655 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 656 657 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} 658 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} 659 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 660 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 661} 662 663setup_nettest_xfrm() { 664 which nettest >/dev/null 665 if [ $? -ne 0 ]; then 666 echo "'nettest' command not found; skipping tests" 667 return 1 668 fi 669 670 [ ${1} -eq 6 ] && proto="-6" || proto="" 671 port=${2} 672 673 run_cmd ${ns_a} nettest ${proto} -q -D -s -x -p ${port} -t 5 & 674 nettest_pids="${nettest_pids} $!" 675 676 run_cmd ${ns_b} nettest ${proto} -q -D -s -x -p ${port} -t 5 & 677 nettest_pids="${nettest_pids} $!" 678} 679 680setup_xfrm4() { 681 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} 682} 683 684setup_xfrm6() { 685 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} 686} 687 688setup_xfrm4udp() { 689 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} "encap espinudp 4500 4500 0.0.0.0" 690 setup_nettest_xfrm 4 4500 691} 692 693setup_xfrm6udp() { 694 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} "encap espinudp 4500 4500 0.0.0.0" 695 setup_nettest_xfrm 6 4500 696} 697 698setup_xfrm4udprouted() { 699 setup_xfrm 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "encap espinudp 4500 4500 0.0.0.0" 700 setup_nettest_xfrm 4 4500 701} 702 703setup_xfrm6udprouted() { 704 setup_xfrm 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "encap espinudp 4500 4500 0.0.0.0" 705 setup_nettest_xfrm 6 4500 706} 707 708setup_routing_old() { 709 for i in ${routes}; do 710 [ "${ns}" = "" ] && ns="${i}" && continue 711 [ "${addr}" = "" ] && addr="${i}" && continue 712 [ "${gw}" = "" ] && gw="${i}" 713 714 ns_name="$(nsname ${ns})" 715 716 ip -n ${ns_name} route add ${addr} via ${gw} 717 718 ns=""; addr=""; gw="" 719 done 720} 721 722setup_routing_new() { 723 for i in ${nexthops}; do 724 [ "${ns}" = "" ] && ns="${i}" && continue 725 [ "${fam}" = "" ] && fam="${i}" && continue 726 [ "${nhid}" = "" ] && nhid="${i}" && continue 727 [ "${gw}" = "" ] && gw="${i}" && continue 728 [ "${dev}" = "" ] && dev="${i}" 729 730 ns_name="$(nsname ${ns})" 731 732 ip -n ${ns_name} -${fam} nexthop add id ${nhid} via ${gw} dev ${dev} 733 734 ns=""; fam=""; nhid=""; gw=""; dev="" 735 736 done 737 738 for i in ${routes_nh}; do 739 [ "${ns}" = "" ] && ns="${i}" && continue 740 [ "${fam}" = "" ] && fam="${i}" && continue 741 [ "${addr}" = "" ] && addr="${i}" && continue 742 [ "${nhid}" = "" ] && nhid="${i}" 743 744 ns_name="$(nsname ${ns})" 745 746 ip -n ${ns_name} -${fam} route add ${addr} nhid ${nhid} 747 748 ns=""; fam=""; addr=""; nhid="" 749 done 750} 751 752setup_routing() { 753 for i in ${NS_R1} ${NS_R2}; do 754 ip netns exec ${i} sysctl -q net/ipv4/ip_forward=1 755 ip netns exec ${i} sysctl -q net/ipv6/conf/all/forwarding=1 756 done 757 758 for i in ${routing_addrs}; do 759 [ "${ns}" = "" ] && ns="${i}" && continue 760 [ "${peer}" = "" ] && peer="${i}" && continue 761 [ "${segment}" = "" ] && segment="${i}" 762 763 ns_name="$(nsname ${ns})" 764 peer_name="$(nsname ${peer})" 765 if="veth_${ns}-${peer}" 766 ifpeer="veth_${peer}-${ns}" 767 768 # Create veth links 769 ip link add ${if} up netns ${ns_name} type veth peer name ${ifpeer} netns ${peer_name} || return 1 770 ip -n ${peer_name} link set dev ${ifpeer} up 771 772 # Add addresses 773 ip -n ${ns_name} addr add ${prefix4}.${segment}.1/24 dev ${if} 774 ip -n ${ns_name} addr add ${prefix6}:${segment}::1/64 dev ${if} 775 776 ip -n ${peer_name} addr add ${prefix4}.${segment}.2/24 dev ${ifpeer} 777 ip -n ${peer_name} addr add ${prefix6}:${segment}::2/64 dev ${ifpeer} 778 779 ns=""; peer=""; segment="" 780 done 781 782 if [ "$USE_NH" = "yes" ]; then 783 setup_routing_new 784 else 785 setup_routing_old 786 fi 787 788 return 0 789} 790 791setup_bridge() { 792 run_cmd ${ns_a} ip link add br0 type bridge || return $ksft_skip 793 run_cmd ${ns_a} ip link set br0 up 794 795 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 796 run_cmd ${ns_c} ip link set veth_A-C netns ns-A 797 798 run_cmd ${ns_a} ip link set veth_A-C up 799 run_cmd ${ns_c} ip link set veth_C-A up 800 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 801 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 802 run_cmd ${ns_a} ip link set veth_A-C master br0 803} 804 805setup_ovs_vxlan_or_geneve() { 806 type="${1}" 807 a_addr="${2}" 808 b_addr="${3}" 809 810 if [ "${type}" = "vxlan" ]; then 811 opts="${opts} ttl 64 dstport 4789" 812 opts_b="local ${b_addr}" 813 fi 814 815 run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \ 816 set interface ${type}_a type=${type} \ 817 options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1 818 819 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1 820 821 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 822 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 823 824 run_cmd ${ns_b} ip link set ${type}_b up 825} 826 827setup_ovs_geneve4() { 828 setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 829} 830 831setup_ovs_vxlan4() { 832 setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 833} 834 835setup_ovs_geneve6() { 836 setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 837} 838 839setup_ovs_vxlan6() { 840 setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 841} 842 843setup_ovs_bridge() { 844 run_cmd ovs-vsctl add-br ovs_br0 || return $ksft_skip 845 run_cmd ip link set ovs_br0 up 846 847 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 848 run_cmd ${ns_c} ip link set veth_A-C netns 1 849 850 run_cmd ip link set veth_A-C up 851 run_cmd ${ns_c} ip link set veth_C-A up 852 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 853 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 854 run_cmd ovs-vsctl add-port ovs_br0 veth_A-C 855 856 # Move veth_A-R1 to init 857 run_cmd ${ns_a} ip link set veth_A-R1 netns 1 858 run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1 859 run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1 860 run_cmd ip link set veth_A-R1 up 861 run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2 862 run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 863} 864 865setup() { 866 [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip 867 868 cleanup 869 for arg do 870 eval setup_${arg} || { echo " ${arg} not supported"; return 1; } 871 done 872} 873 874trace() { 875 [ $TRACING -eq 0 ] && return 876 877 for arg do 878 [ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue 879 ${ns_cmd} tcpdump -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null & 880 tcpdump_pids="${tcpdump_pids} $!" 881 ns_cmd= 882 done 883 sleep 1 884} 885 886cleanup() { 887 for pid in ${tcpdump_pids}; do 888 kill ${pid} 889 done 890 tcpdump_pids= 891 892 for pid in ${nettest_pids}; do 893 kill ${pid} 894 done 895 nettest_pids= 896 897 for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do 898 ip netns del ${n} 2> /dev/null 899 done 900 901 ip link del veth_A-C 2>/dev/null 902 ip link del veth_A-R1 2>/dev/null 903 ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null 904 ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null 905} 906 907mtu() { 908 ns_cmd="${1}" 909 dev="${2}" 910 mtu="${3}" 911 912 ${ns_cmd} ip link set dev ${dev} mtu ${mtu} 913} 914 915mtu_parse() { 916 input="${1}" 917 918 next=0 919 for i in ${input}; do 920 [ ${next} -eq 1 -a "${i}" = "lock" ] && next=2 && continue 921 [ ${next} -eq 1 ] && echo "${i}" && return 922 [ ${next} -eq 2 ] && echo "lock ${i}" && return 923 [ "${i}" = "mtu" ] && next=1 924 done 925} 926 927link_get() { 928 ns_cmd="${1}" 929 name="${2}" 930 931 ${ns_cmd} ip link show dev "${name}" 932} 933 934link_get_mtu() { 935 ns_cmd="${1}" 936 name="${2}" 937 938 mtu_parse "$(link_get "${ns_cmd}" ${name})" 939} 940 941route_get_dst_exception() { 942 ns_cmd="${1}" 943 dst="${2}" 944 945 ${ns_cmd} ip route get "${dst}" 946} 947 948route_get_dst_pmtu_from_exception() { 949 ns_cmd="${1}" 950 dst="${2}" 951 952 mtu_parse "$(route_get_dst_exception "${ns_cmd}" ${dst})" 953} 954 955check_pmtu_value() { 956 expected="${1}" 957 value="${2}" 958 event="${3}" 959 960 [ "${expected}" = "any" ] && [ -n "${value}" ] && return 0 961 [ "${value}" = "${expected}" ] && return 0 962 [ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1 963 [ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1 964 err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}" 965 return 1 966} 967 968test_pmtu_ipvX() { 969 family=${1} 970 971 setup namespaces routing || return $ksft_skip 972 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 973 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 974 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 975 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 976 977 if [ ${family} -eq 4 ]; then 978 ping=ping 979 dst1="${prefix4}.${b_r1}.1" 980 dst2="${prefix4}.${b_r2}.1" 981 else 982 ping=${ping6} 983 dst1="${prefix6}:${b_r1}::1" 984 dst2="${prefix6}:${b_r2}::1" 985 fi 986 987 # Set up initial MTU values 988 mtu "${ns_a}" veth_A-R1 2000 989 mtu "${ns_r1}" veth_R1-A 2000 990 mtu "${ns_r1}" veth_R1-B 1400 991 mtu "${ns_b}" veth_B-R1 1400 992 993 mtu "${ns_a}" veth_A-R2 2000 994 mtu "${ns_r2}" veth_R2-A 2000 995 mtu "${ns_r2}" veth_R2-B 1500 996 mtu "${ns_b}" veth_B-R2 1500 997 998 # Create route exceptions 999 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 1000 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 1001 1002 # Check that exceptions have been created with the correct PMTU 1003 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1004 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1005 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1006 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1007 1008 # Decrease local MTU below PMTU, check for PMTU decrease in route exception 1009 mtu "${ns_a}" veth_A-R1 1300 1010 mtu "${ns_r1}" veth_R1-A 1300 1011 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1012 check_pmtu_value "1300" "${pmtu_1}" "decreasing local MTU" || return 1 1013 # Second exception shouldn't be modified 1014 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1015 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1016 1017 # Increase MTU, check for PMTU increase in route exception 1018 mtu "${ns_a}" veth_A-R1 1700 1019 mtu "${ns_r1}" veth_R1-A 1700 1020 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1021 check_pmtu_value "1700" "${pmtu_1}" "increasing local MTU" || return 1 1022 # Second exception shouldn't be modified 1023 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1024 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1025 1026 # Skip PMTU locking tests for IPv6 1027 [ $family -eq 6 ] && return 0 1028 1029 # Decrease remote MTU on path via R2, get new exception 1030 mtu "${ns_r2}" veth_R2-B 400 1031 mtu "${ns_b}" veth_B-R2 400 1032 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1033 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1034 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1035 1036 # Decrease local MTU below PMTU 1037 mtu "${ns_a}" veth_A-R2 500 1038 mtu "${ns_r2}" veth_R2-A 500 1039 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1040 check_pmtu_value "500" "${pmtu_2}" "decreasing local MTU" || return 1 1041 1042 # Increase local MTU 1043 mtu "${ns_a}" veth_A-R2 1500 1044 mtu "${ns_r2}" veth_R2-A 1500 1045 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1046 check_pmtu_value "1500" "${pmtu_2}" "increasing local MTU" || return 1 1047 1048 # Get new exception 1049 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1050 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1051 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1052} 1053 1054test_pmtu_ipv4_exception() { 1055 test_pmtu_ipvX 4 1056} 1057 1058test_pmtu_ipv6_exception() { 1059 test_pmtu_ipvX 6 1060} 1061 1062test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() { 1063 type=${1} 1064 family=${2} 1065 outer_family=${3} 1066 ll_mtu=4000 1067 1068 if [ ${outer_family} -eq 4 ]; then 1069 setup namespaces routing ${type}4 || return $ksft_skip 1070 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1071 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1072 else 1073 setup namespaces routing ${type}6 || return $ksft_skip 1074 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1075 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1076 fi 1077 1078 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1079 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1080 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1081 1082 if [ ${family} -eq 4 ]; then 1083 ping=ping 1084 dst=${tunnel4_b_addr} 1085 else 1086 ping=${ping6} 1087 dst=${tunnel6_b_addr} 1088 fi 1089 1090 # Create route exception by exceeding link layer MTU 1091 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1092 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1093 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1094 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1095 1096 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1097 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1098 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1099 1100 # Check that exception was created 1101 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1102 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface" 1103} 1104 1105test_pmtu_ipv4_vxlan4_exception() { 1106 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4 1107} 1108 1109test_pmtu_ipv6_vxlan4_exception() { 1110 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4 1111} 1112 1113test_pmtu_ipv4_geneve4_exception() { 1114 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4 1115} 1116 1117test_pmtu_ipv6_geneve4_exception() { 1118 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4 1119} 1120 1121test_pmtu_ipv4_vxlan6_exception() { 1122 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6 1123} 1124 1125test_pmtu_ipv6_vxlan6_exception() { 1126 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6 1127} 1128 1129test_pmtu_ipv4_geneve6_exception() { 1130 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6 1131} 1132 1133test_pmtu_ipv6_geneve6_exception() { 1134 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6 1135} 1136 1137test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() { 1138 type=${1} 1139 family=${2} 1140 outer_family=${3} 1141 ll_mtu=4000 1142 1143 if [ ${outer_family} -eq 4 ]; then 1144 setup namespaces routing bridge bridged_${type}4 || return $ksft_skip 1145 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1146 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1147 else 1148 setup namespaces routing bridge bridged_${type}6 || return $ksft_skip 1149 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1150 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1151 fi 1152 1153 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1154 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1155 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1156 "${ns_a}" br0 "${ns_a}" veth-A-C \ 1157 "${ns_c}" veth_C-A 1158 1159 if [ ${family} -eq 4 ]; then 1160 ping=ping 1161 dst=${tunnel4_b_addr} 1162 else 1163 ping=${ping6} 1164 dst=${tunnel6_b_addr} 1165 fi 1166 1167 # Create route exception by exceeding link layer MTU 1168 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1169 mtu "${ns_a}" br0 $((${ll_mtu} + 1000)) 1170 mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000)) 1171 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1172 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1173 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1174 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1175 1176 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1177 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1178 1179 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1 1180 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1 1181 1182 # Check that exceptions were created 1183 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1184 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface" 1185 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1186 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface" 1187} 1188 1189test_pmtu_ipv4_br_vxlan4_exception() { 1190 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4 1191} 1192 1193test_pmtu_ipv6_br_vxlan4_exception() { 1194 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4 1195} 1196 1197test_pmtu_ipv4_br_geneve4_exception() { 1198 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4 1199} 1200 1201test_pmtu_ipv6_br_geneve4_exception() { 1202 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4 1203} 1204 1205test_pmtu_ipv4_br_vxlan6_exception() { 1206 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6 1207} 1208 1209test_pmtu_ipv6_br_vxlan6_exception() { 1210 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6 1211} 1212 1213test_pmtu_ipv4_br_geneve6_exception() { 1214 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6 1215} 1216 1217test_pmtu_ipv6_br_geneve6_exception() { 1218 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6 1219} 1220 1221test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() { 1222 type=${1} 1223 family=${2} 1224 outer_family=${3} 1225 ll_mtu=4000 1226 1227 if [ ${outer_family} -eq 4 ]; then 1228 setup namespaces routing ovs_bridge ovs_${type}4 || return $ksft_skip 1229 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1230 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1231 else 1232 setup namespaces routing ovs_bridge ovs_${type}6 || return $ksft_skip 1233 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1234 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1235 fi 1236 1237 if [ "${type}" = "vxlan" ]; then 1238 tun_a="vxlan_sys_4789" 1239 elif [ "${type}" = "geneve" ]; then 1240 tun_a="genev_sys_6081" 1241 fi 1242 1243 trace "" "${tun_a}" "${ns_b}" ${type}_b \ 1244 "" veth_A-R1 "${ns_r1}" veth_R1-A \ 1245 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1246 "" ovs_br0 "" veth-A-C \ 1247 "${ns_c}" veth_C-A 1248 1249 if [ ${family} -eq 4 ]; then 1250 ping=ping 1251 dst=${tunnel4_b_addr} 1252 else 1253 ping=${ping6} 1254 dst=${tunnel6_b_addr} 1255 fi 1256 1257 # Create route exception by exceeding link layer MTU 1258 mtu "" veth_A-R1 $((${ll_mtu} + 1000)) 1259 mtu "" ovs_br0 $((${ll_mtu} + 1000)) 1260 mtu "" veth_A-C $((${ll_mtu} + 1000)) 1261 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1262 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1263 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1264 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1265 1266 mtu "" ${tun_a} $((${ll_mtu} + 1000)) 1267 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1268 1269 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1 1270 1271 # Check that exceptions were created 1272 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1273 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface" 1274} 1275 1276test_pmtu_ipv4_ovs_vxlan4_exception() { 1277 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4 1278} 1279 1280test_pmtu_ipv6_ovs_vxlan4_exception() { 1281 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4 1282} 1283 1284test_pmtu_ipv4_ovs_geneve4_exception() { 1285 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4 1286} 1287 1288test_pmtu_ipv6_ovs_geneve4_exception() { 1289 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4 1290} 1291 1292test_pmtu_ipv4_ovs_vxlan6_exception() { 1293 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6 1294} 1295 1296test_pmtu_ipv6_ovs_vxlan6_exception() { 1297 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6 1298} 1299 1300test_pmtu_ipv4_ovs_geneve6_exception() { 1301 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6 1302} 1303 1304test_pmtu_ipv6_ovs_geneve6_exception() { 1305 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6 1306} 1307 1308test_pmtu_ipvX_over_fouY_or_gueY() { 1309 inner_family=${1} 1310 outer_family=${2} 1311 encap=${3} 1312 ll_mtu=4000 1313 1314 setup namespaces routing ${encap}${outer_family}${inner_family} || return $ksft_skip 1315 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1316 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1317 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1318 1319 if [ ${inner_family} -eq 4 ]; then 1320 ping=ping 1321 dst=${tunnel4_b_addr} 1322 else 1323 ping=${ping6} 1324 dst=${tunnel6_b_addr} 1325 fi 1326 1327 if [ "${encap}" = "gue" ]; then 1328 encap_overhead=4 1329 else 1330 encap_overhead=0 1331 fi 1332 1333 if [ ${outer_family} -eq 4 ]; then 1334 # IPv4 header UDP header 1335 exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead})) 1336 else 1337 # IPv6 header Option 4 UDP header 1338 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead})) 1339 fi 1340 1341 # Create route exception by exceeding link layer MTU 1342 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1343 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1344 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1345 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1346 1347 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1348 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1349 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1350 1351 # Check that exception was created 1352 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1353 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${encap} interface" 1354} 1355 1356test_pmtu_ipv4_fou4_exception() { 1357 test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou 1358} 1359 1360test_pmtu_ipv6_fou4_exception() { 1361 test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou 1362} 1363 1364test_pmtu_ipv4_fou6_exception() { 1365 test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou 1366} 1367 1368test_pmtu_ipv6_fou6_exception() { 1369 test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou 1370} 1371 1372test_pmtu_ipv4_gue4_exception() { 1373 test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue 1374} 1375 1376test_pmtu_ipv6_gue4_exception() { 1377 test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue 1378} 1379 1380test_pmtu_ipv4_gue6_exception() { 1381 test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue 1382} 1383 1384test_pmtu_ipv6_gue6_exception() { 1385 test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue 1386} 1387 1388test_pmtu_ipvX_over_ipvY_exception() { 1389 inner=${1} 1390 outer=${2} 1391 ll_mtu=4000 1392 1393 setup namespaces routing ip${inner}ip${outer} || return $ksft_skip 1394 1395 trace "${ns_a}" ip_a "${ns_b}" ip_b \ 1396 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1397 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1398 1399 if [ ${inner} -eq 4 ]; then 1400 ping=ping 1401 dst=${tunnel4_b_addr} 1402 else 1403 ping=${ping6} 1404 dst=${tunnel6_b_addr} 1405 fi 1406 1407 if [ ${outer} -eq 4 ]; then 1408 # IPv4 header 1409 exp_mtu=$((${ll_mtu} - 20)) 1410 else 1411 # IPv6 header Option 4 1412 exp_mtu=$((${ll_mtu} - 40 - 8)) 1413 fi 1414 1415 # Create route exception by exceeding link layer MTU 1416 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1417 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1418 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1419 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1420 1421 mtu "${ns_a}" ip_a $((${ll_mtu} + 1000)) || return 1422 mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return 1423 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1424 1425 # Check that exception was created 1426 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1427 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface" 1428} 1429 1430test_pmtu_ipv4_ipv4_exception() { 1431 test_pmtu_ipvX_over_ipvY_exception 4 4 1432} 1433 1434test_pmtu_ipv6_ipv4_exception() { 1435 test_pmtu_ipvX_over_ipvY_exception 6 4 1436} 1437 1438test_pmtu_ipv4_ipv6_exception() { 1439 test_pmtu_ipvX_over_ipvY_exception 4 6 1440} 1441 1442test_pmtu_ipv6_ipv6_exception() { 1443 test_pmtu_ipvX_over_ipvY_exception 6 6 1444} 1445 1446test_pmtu_vti4_exception() { 1447 setup namespaces veth vti4 xfrm4 || return $ksft_skip 1448 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1449 "${ns_a}" vti4_a "${ns_b}" vti4_b 1450 1451 veth_mtu=1500 1452 vti_mtu=$((veth_mtu - 20)) 1453 1454 # SPI SN IV ICV pad length next header 1455 esp_payload_rfc4106=$((vti_mtu - 4 - 4 - 8 - 16 - 1 - 1)) 1456 ping_payload=$((esp_payload_rfc4106 - 28)) 1457 1458 mtu "${ns_a}" veth_a ${veth_mtu} 1459 mtu "${ns_b}" veth_b ${veth_mtu} 1460 mtu "${ns_a}" vti4_a ${vti_mtu} 1461 mtu "${ns_b}" vti4_b ${vti_mtu} 1462 1463 # Send DF packet without exceeding link layer MTU, check that no 1464 # exception is created 1465 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1466 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1467 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1468 1469 # Now exceed link layer MTU by one byte, check that exception is created 1470 # with the right PMTU value 1471 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1472 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1473 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1474} 1475 1476test_pmtu_vti6_exception() { 1477 setup namespaces veth vti6 xfrm6 || return $ksft_skip 1478 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1479 "${ns_a}" vti6_a "${ns_b}" vti6_b 1480 fail=0 1481 1482 # Create route exception by exceeding link layer MTU 1483 mtu "${ns_a}" veth_a 4000 1484 mtu "${ns_b}" veth_b 4000 1485 mtu "${ns_a}" vti6_a 5000 1486 mtu "${ns_b}" vti6_b 5000 1487 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1488 1489 # Check that exception was created 1490 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1491 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1492 1493 # Decrease tunnel MTU, check for PMTU decrease in route exception 1494 mtu "${ns_a}" vti6_a 3000 1495 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1496 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1497 1498 # Increase tunnel MTU, check for PMTU increase in route exception 1499 mtu "${ns_a}" vti6_a 9000 1500 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1501 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1502 1503 return ${fail} 1504} 1505 1506test_pmtu_vti4_udp_exception() { 1507 setup namespaces veth vti4 xfrm4udp || return $ksft_skip 1508 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1509 "${ns_a}" vti4_a "${ns_b}" vti4_b 1510 1511 veth_mtu=1500 1512 vti_mtu=$((veth_mtu - 20)) 1513 1514 # UDP SPI SN IV ICV pad length next header 1515 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1516 ping_payload=$((esp_payload_rfc4106 - 28)) 1517 1518 mtu "${ns_a}" veth_a ${veth_mtu} 1519 mtu "${ns_b}" veth_b ${veth_mtu} 1520 mtu "${ns_a}" vti4_a ${vti_mtu} 1521 mtu "${ns_b}" vti4_b ${vti_mtu} 1522 1523 # Send DF packet without exceeding link layer MTU, check that no 1524 # exception is created 1525 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1526 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1527 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1528 1529 # Now exceed link layer MTU by one byte, check that exception is created 1530 # with the right PMTU value 1531 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1532 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1533 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1534} 1535 1536test_pmtu_vti6_udp_exception() { 1537 setup namespaces veth vti6 xfrm6udp || return $ksft_skip 1538 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1539 "${ns_a}" vti6_a "${ns_b}" vti6_b 1540 fail=0 1541 1542 # Create route exception by exceeding link layer MTU 1543 mtu "${ns_a}" veth_a 4000 1544 mtu "${ns_b}" veth_b 4000 1545 mtu "${ns_a}" vti6_a 5000 1546 mtu "${ns_b}" vti6_b 5000 1547 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1548 1549 # Check that exception was created 1550 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1551 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1552 1553 # Decrease tunnel MTU, check for PMTU decrease in route exception 1554 mtu "${ns_a}" vti6_a 3000 1555 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1556 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1557 1558 # Increase tunnel MTU, check for PMTU increase in route exception 1559 mtu "${ns_a}" vti6_a 9000 1560 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1561 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1562 1563 return ${fail} 1564} 1565 1566test_pmtu_vti4_udp_routed_exception() { 1567 setup namespaces routing vti4routed xfrm4udprouted || return $ksft_skip 1568 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1569 "${ns_a}" vti4_a "${ns_b}" vti4_b 1570 1571 veth_mtu=1500 1572 vti_mtu=$((veth_mtu - 20)) 1573 1574 # UDP SPI SN IV ICV pad length next header 1575 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1576 ping_payload=$((esp_payload_rfc4106 - 28)) 1577 1578 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1579 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1580 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1581 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1582 1583 mtu "${ns_a}" vti4_a ${vti_mtu} 1584 mtu "${ns_b}" vti4_b ${vti_mtu} 1585 1586 # Send DF packet without exceeding link layer MTU, check that no 1587 # exception is created 1588 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1589 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1590 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1591 1592 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1593 # with the right PMTU value 1594 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1595 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel4_b_addr} 1596 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1597 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1598} 1599 1600test_pmtu_vti6_udp_routed_exception() { 1601 setup namespaces routing vti6routed xfrm6udprouted || return $ksft_skip 1602 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1603 "${ns_a}" vti6_a "${ns_b}" vti6_b 1604 1605 veth_mtu=1500 1606 vti_mtu=$((veth_mtu - 40)) 1607 1608 # UDP SPI SN IV ICV pad length next header 1609 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1610 ping_payload=$((esp_payload_rfc4106 - 48)) 1611 1612 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1613 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1614 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1615 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1616 1617 # mtu "${ns_a}" vti6_a ${vti_mtu} 1618 # mtu "${ns_b}" vti6_b ${vti_mtu} 1619 1620 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel6_b_addr} 1621 1622 # Check that exception was not created 1623 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1624 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1625 1626 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1627 # with the right PMTU value 1628 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1629 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel6_b_addr} 1630 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1631 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1632 1633} 1634 1635test_pmtu_vti4_default_mtu() { 1636 setup namespaces veth vti4 || return $ksft_skip 1637 1638 # Check that MTU of vti device is MTU of veth minus IPv4 header length 1639 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1640 vti4_mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1641 if [ $((veth_mtu - vti4_mtu)) -ne 20 ]; then 1642 err " vti MTU ${vti4_mtu} is not veth MTU ${veth_mtu} minus IPv4 header length" 1643 return 1 1644 fi 1645} 1646 1647test_pmtu_vti6_default_mtu() { 1648 setup namespaces veth vti6 || return $ksft_skip 1649 1650 # Check that MTU of vti device is MTU of veth minus IPv6 header length 1651 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1652 vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1653 if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then 1654 err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length" 1655 return 1 1656 fi 1657} 1658 1659test_pmtu_vti4_link_add_mtu() { 1660 setup namespaces || return $ksft_skip 1661 1662 run_cmd ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1663 [ $? -ne 0 ] && err " vti not supported" && return $ksft_skip 1664 run_cmd ${ns_a} ip link del vti4_a 1665 1666 fail=0 1667 1668 min=68 1669 max=$((65535 - 20)) 1670 # Check invalid values first 1671 for v in $((min - 1)) $((max + 1)); do 1672 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1673 # This can fail, or MTU can be adjusted to a proper value 1674 [ $? -ne 0 ] && continue 1675 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1676 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1677 err " vti tunnel created with invalid MTU ${mtu}" 1678 fail=1 1679 fi 1680 run_cmd ${ns_a} ip link del vti4_a 1681 done 1682 1683 # Now check valid values 1684 for v in ${min} 1300 ${max}; do 1685 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1686 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1687 run_cmd ${ns_a} ip link del vti4_a 1688 if [ "${mtu}" != "${v}" ]; then 1689 err " vti MTU ${mtu} doesn't match configured value ${v}" 1690 fail=1 1691 fi 1692 done 1693 1694 return ${fail} 1695} 1696 1697test_pmtu_vti6_link_add_mtu() { 1698 setup namespaces || return $ksft_skip 1699 1700 run_cmd ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1701 [ $? -ne 0 ] && err " vti6 not supported" && return $ksft_skip 1702 run_cmd ${ns_a} ip link del vti6_a 1703 1704 fail=0 1705 1706 min=68 # vti6 can carry IPv4 packets too 1707 max=$((65535 - 40)) 1708 # Check invalid values first 1709 for v in $((min - 1)) $((max + 1)); do 1710 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1711 # This can fail, or MTU can be adjusted to a proper value 1712 [ $? -ne 0 ] && continue 1713 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1714 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1715 err " vti6 tunnel created with invalid MTU ${v}" 1716 fail=1 1717 fi 1718 run_cmd ${ns_a} ip link del vti6_a 1719 done 1720 1721 # Now check valid values 1722 for v in 68 1280 1300 $((65535 - 40)); do 1723 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1724 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1725 run_cmd ${ns_a} ip link del vti6_a 1726 if [ "${mtu}" != "${v}" ]; then 1727 err " vti6 MTU ${mtu} doesn't match configured value ${v}" 1728 fail=1 1729 fi 1730 done 1731 1732 return ${fail} 1733} 1734 1735test_pmtu_vti6_link_change_mtu() { 1736 setup namespaces || return $ksft_skip 1737 1738 run_cmd ${ns_a} ip link add dummy0 mtu 1500 type dummy 1739 [ $? -ne 0 ] && err " dummy not supported" && return $ksft_skip 1740 run_cmd ${ns_a} ip link add dummy1 mtu 3000 type dummy 1741 run_cmd ${ns_a} ip link set dummy0 up 1742 run_cmd ${ns_a} ip link set dummy1 up 1743 1744 run_cmd ${ns_a} ip addr add ${dummy6_0_prefix}1/${dummy6_mask} dev dummy0 1745 run_cmd ${ns_a} ip addr add ${dummy6_1_prefix}1/${dummy6_mask} dev dummy1 1746 1747 fail=0 1748 1749 # Create vti6 interface bound to device, passing MTU, check it 1750 run_cmd ${ns_a} ip link add vti6_a mtu 1300 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1751 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1752 if [ ${mtu} -ne 1300 ]; then 1753 err " vti6 MTU ${mtu} doesn't match configured value 1300" 1754 fail=1 1755 fi 1756 1757 # Move to another device with different MTU, without passing MTU, check 1758 # MTU is adjusted 1759 run_cmd ${ns_a} ip link set vti6_a type vti6 remote ${dummy6_1_prefix}2 local ${dummy6_1_prefix}1 1760 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1761 if [ ${mtu} -ne $((3000 - 40)) ]; then 1762 err " vti MTU ${mtu} is not dummy MTU 3000 minus IPv6 header length" 1763 fail=1 1764 fi 1765 1766 # Move it back, passing MTU, check MTU is not overridden 1767 run_cmd ${ns_a} ip link set vti6_a mtu 1280 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1768 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1769 if [ ${mtu} -ne 1280 ]; then 1770 err " vti6 MTU ${mtu} doesn't match configured value 1280" 1771 fail=1 1772 fi 1773 1774 return ${fail} 1775} 1776 1777check_command() { 1778 cmd=${1} 1779 1780 if ! which ${cmd} > /dev/null 2>&1; then 1781 err " missing required command: '${cmd}'" 1782 return 1 1783 fi 1784 return 0 1785} 1786 1787test_cleanup_vxlanX_exception() { 1788 outer="${1}" 1789 encap="vxlan" 1790 ll_mtu=4000 1791 1792 check_command taskset || return $ksft_skip 1793 cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) 1794 1795 setup namespaces routing ${encap}${outer} || return $ksft_skip 1796 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1797 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1798 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1799 1800 # Create route exception by exceeding link layer MTU 1801 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1802 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1803 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1804 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1805 1806 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1807 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1808 1809 # Fill exception cache for multiple CPUs (2) 1810 # we can always use inner IPv4 for that 1811 for cpu in ${cpu_list}; do 1812 run_cmd taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr} 1813 done 1814 1815 ${ns_a} ip link del dev veth_A-R1 & 1816 iplink_pid=$! 1817 sleep 1 1818 if [ "$(cat /proc/${iplink_pid}/cmdline 2>/dev/null | tr -d '\0')" = "iplinkdeldevveth_A-R1" ]; then 1819 err " can't delete veth device in a timely manner, PMTU dst likely leaked" 1820 return 1 1821 fi 1822} 1823 1824test_cleanup_ipv6_exception() { 1825 test_cleanup_vxlanX_exception 6 1826} 1827 1828test_cleanup_ipv4_exception() { 1829 test_cleanup_vxlanX_exception 4 1830} 1831 1832run_test() { 1833 ( 1834 tname="$1" 1835 tdesc="$2" 1836 1837 unset IFS 1838 1839 if [ "$VERBOSE" = "1" ]; then 1840 printf "\n##########################################################################\n\n" 1841 fi 1842 1843 eval test_${tname} 1844 ret=$? 1845 1846 if [ $ret -eq 0 ]; then 1847 printf "TEST: %-60s [ OK ]\n" "${tdesc}" 1848 elif [ $ret -eq 1 ]; then 1849 printf "TEST: %-60s [FAIL]\n" "${tdesc}" 1850 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 1851 echo 1852 echo "Pausing. Hit enter to continue" 1853 read a 1854 fi 1855 err_flush 1856 exit 1 1857 elif [ $ret -eq $ksft_skip ]; then 1858 printf "TEST: %-60s [SKIP]\n" "${tdesc}" 1859 err_flush 1860 fi 1861 1862 return $ret 1863 ) 1864 ret=$? 1865 case $ret in 1866 0) 1867 all_skipped=false 1868 [ $exitcode=$ksft_skip ] && exitcode=0 1869 ;; 1870 $ksft_skip) 1871 [ $all_skipped = true ] && exitcode=$ksft_skip 1872 ;; 1873 *) 1874 all_skipped=false 1875 exitcode=1 1876 ;; 1877 esac 1878 1879 return $ret 1880} 1881 1882run_test_nh() { 1883 tname="$1" 1884 tdesc="$2" 1885 1886 USE_NH=yes 1887 run_test "${tname}" "${tdesc} - nexthop objects" 1888 USE_NH=no 1889} 1890 1891test_list_flush_ipv4_exception() { 1892 setup namespaces routing || return $ksft_skip 1893 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1894 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1895 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1896 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1897 1898 dst_prefix1="${prefix4}.${b_r1}." 1899 dst2="${prefix4}.${b_r2}.1" 1900 1901 # Set up initial MTU values 1902 mtu "${ns_a}" veth_A-R1 2000 1903 mtu "${ns_r1}" veth_R1-A 2000 1904 mtu "${ns_r1}" veth_R1-B 1500 1905 mtu "${ns_b}" veth_B-R1 1500 1906 1907 mtu "${ns_a}" veth_A-R2 2000 1908 mtu "${ns_r2}" veth_R2-A 2000 1909 mtu "${ns_r2}" veth_R2-B 1500 1910 mtu "${ns_b}" veth_B-R2 1500 1911 1912 fail=0 1913 1914 # Add 100 addresses for veth endpoint on B reached by default A route 1915 for i in $(seq 100 199); do 1916 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 1917 done 1918 1919 # Create 100 cached route exceptions for path via R1, one via R2. Note 1920 # that with IPv4 we need to actually cause a route lookup that matches 1921 # the exception caused by ICMP, in order to actually have a cached 1922 # route, so we need to ping each destination twice 1923 for i in $(seq 100 199); do 1924 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}" 1925 done 1926 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}" 1927 1928 if [ "$(${ns_a} ip -oneline route list cache | wc -l)" -ne 101 ]; then 1929 err " can't list cached exceptions" 1930 fail=1 1931 fi 1932 1933 run_cmd ${ns_a} ip route flush cache 1934 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)" 1935 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)" 1936 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 1937 [ -n "$(${ns_a} ip route list cache)" ]; then 1938 err " can't flush cached exceptions" 1939 fail=1 1940 fi 1941 1942 return ${fail} 1943} 1944 1945test_list_flush_ipv6_exception() { 1946 setup namespaces routing || return $ksft_skip 1947 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1948 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1949 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1950 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1951 1952 dst_prefix1="${prefix6}:${b_r1}::" 1953 dst2="${prefix6}:${b_r2}::1" 1954 1955 # Set up initial MTU values 1956 mtu "${ns_a}" veth_A-R1 2000 1957 mtu "${ns_r1}" veth_R1-A 2000 1958 mtu "${ns_r1}" veth_R1-B 1500 1959 mtu "${ns_b}" veth_B-R1 1500 1960 1961 mtu "${ns_a}" veth_A-R2 2000 1962 mtu "${ns_r2}" veth_R2-A 2000 1963 mtu "${ns_r2}" veth_R2-B 1500 1964 mtu "${ns_b}" veth_B-R2 1500 1965 1966 fail=0 1967 1968 # Add 100 addresses for veth endpoint on B reached by default A route 1969 for i in $(seq 100 199); do 1970 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 1971 done 1972 1973 # Create 100 cached route exceptions for path via R1, one via R2 1974 for i in $(seq 100 199); do 1975 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}" 1976 done 1977 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}" 1978 if [ "$(${ns_a} ip -oneline -6 route list cache | wc -l)" -ne 101 ]; then 1979 err " can't list cached exceptions" 1980 fail=1 1981 fi 1982 1983 run_cmd ${ns_a} ip -6 route flush cache 1984 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")" 1985 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1986 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 1987 [ -n "$(${ns_a} ip -6 route list cache)" ]; then 1988 err " can't flush cached exceptions" 1989 fail=1 1990 fi 1991 1992 return ${fail} 1993} 1994 1995test_pmtu_ipvX_route_change() { 1996 family=${1} 1997 1998 setup namespaces routing || return 2 1999 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2000 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2001 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2002 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2003 2004 if [ ${family} -eq 4 ]; then 2005 ping=ping 2006 dst1="${prefix4}.${b_r1}.1" 2007 dst2="${prefix4}.${b_r2}.1" 2008 gw="${prefix4}.${a_r1}.2" 2009 else 2010 ping=${ping6} 2011 dst1="${prefix6}:${b_r1}::1" 2012 dst2="${prefix6}:${b_r2}::1" 2013 gw="${prefix6}:${a_r1}::2" 2014 fi 2015 2016 # Set up initial MTU values 2017 mtu "${ns_a}" veth_A-R1 2000 2018 mtu "${ns_r1}" veth_R1-A 2000 2019 mtu "${ns_r1}" veth_R1-B 1400 2020 mtu "${ns_b}" veth_B-R1 1400 2021 2022 mtu "${ns_a}" veth_A-R2 2000 2023 mtu "${ns_r2}" veth_R2-A 2000 2024 mtu "${ns_r2}" veth_R2-B 1500 2025 mtu "${ns_b}" veth_B-R2 1500 2026 2027 # Create route exceptions 2028 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 2029 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 2030 2031 # Check that exceptions have been created with the correct PMTU 2032 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 2033 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 2034 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2035 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 2036 2037 # Replace the route from A to R1 2038 run_cmd ${ns_a} ip route change default via ${gw} 2039 2040 # Delete the device in A 2041 run_cmd ${ns_a} ip link del "veth_A-R1" 2042} 2043 2044test_pmtu_ipv4_route_change() { 2045 test_pmtu_ipvX_route_change 4 2046} 2047 2048test_pmtu_ipv6_route_change() { 2049 test_pmtu_ipvX_route_change 6 2050} 2051 2052usage() { 2053 echo 2054 echo "$0 [OPTIONS] [TEST]..." 2055 echo "If no TEST argument is given, all tests will be run." 2056 echo 2057 echo "Options" 2058 echo " --trace: capture traffic to TEST_INTERFACE.pcap" 2059 echo 2060 echo "Available tests${tests}" 2061 exit 1 2062} 2063 2064################################################################################ 2065# 2066exitcode=0 2067desc=0 2068all_skipped=true 2069 2070while getopts :ptv o 2071do 2072 case $o in 2073 p) PAUSE_ON_FAIL=yes;; 2074 v) VERBOSE=1;; 2075 t) if which tcpdump > /dev/null 2>&1; then 2076 TRACING=1 2077 else 2078 echo "=== tcpdump not available, tracing disabled" 2079 fi 2080 ;; 2081 *) usage;; 2082 esac 2083done 2084shift $(($OPTIND-1)) 2085 2086IFS=" 2087" 2088 2089for arg do 2090 # Check first that all requested tests are available before running any 2091 command -v > /dev/null "test_${arg}" || { echo "=== Test ${arg} not found"; usage; } 2092done 2093 2094trap cleanup EXIT 2095 2096# start clean 2097cleanup 2098 2099HAVE_NH=no 2100ip nexthop ls >/dev/null 2>&1 2101[ $? -eq 0 ] && HAVE_NH=yes 2102 2103name="" 2104desc="" 2105rerun_nh=0 2106for t in ${tests}; do 2107 [ "${name}" = "" ] && name="${t}" && continue 2108 [ "${desc}" = "" ] && desc="${t}" && continue 2109 2110 if [ "${HAVE_NH}" = "yes" ]; then 2111 rerun_nh="${t}" 2112 fi 2113 2114 run_this=1 2115 for arg do 2116 [ "${arg}" != "${arg#--*}" ] && continue 2117 [ "${arg}" = "${name}" ] && run_this=1 && break 2118 run_this=0 2119 done 2120 if [ $run_this -eq 1 ]; then 2121 run_test "${name}" "${desc}" 2122 # if test was skipped no need to retry with nexthop objects 2123 [ $? -eq $ksft_skip ] && rerun_nh=0 2124 2125 if [ "${rerun_nh}" = "1" ]; then 2126 run_test_nh "${name}" "${desc}" 2127 fi 2128 fi 2129 name="" 2130 desc="" 2131 rerun_nh=0 2132done 2133 2134exit ${exitcode} 2135