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 ${ns_a} ip link set veth_A-C master br0 843} 844 845setup_ovs_vxlan_or_geneve() { 846 type="${1}" 847 a_addr="${2}" 848 b_addr="${3}" 849 850 if [ "${type}" = "vxlan" ]; then 851 opts="${opts} ttl 64 dstport 4789" 852 opts_b="local ${b_addr}" 853 fi 854 855 run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \ 856 set interface ${type}_a type=${type} \ 857 options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1 858 859 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1 860 861 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 862 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 863 864 run_cmd ${ns_b} ip link set ${type}_b up 865} 866 867setup_ovs_geneve4() { 868 setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 869} 870 871setup_ovs_vxlan4() { 872 setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 873} 874 875setup_ovs_geneve6() { 876 setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 877} 878 879setup_ovs_vxlan6() { 880 setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 881} 882 883setup_ovs_bridge() { 884 run_cmd ovs-vsctl add-br ovs_br0 || return $ksft_skip 885 run_cmd ip link set ovs_br0 up 886 887 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 888 run_cmd ${ns_c} ip link set veth_A-C netns 1 889 890 run_cmd ip link set veth_A-C up 891 run_cmd ${ns_c} ip link set veth_C-A up 892 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 893 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 894 run_cmd ovs-vsctl add-port ovs_br0 veth_A-C 895 896 # Move veth_A-R1 to init 897 run_cmd ${ns_a} ip link set veth_A-R1 netns 1 898 run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1 899 run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1 900 run_cmd ip link set veth_A-R1 up 901 run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2 902 run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 903} 904 905setup() { 906 [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip 907 908 for arg do 909 eval setup_${arg} || { echo " ${arg} not supported"; return 1; } 910 done 911} 912 913trace() { 914 [ $TRACING -eq 0 ] && return 915 916 for arg do 917 [ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue 918 ${ns_cmd} tcpdump --immediate-mode -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null & 919 tcpdump_pids="${tcpdump_pids} $!" 920 ns_cmd= 921 done 922 sleep 1 923} 924 925cleanup() { 926 for pid in ${tcpdump_pids}; do 927 kill ${pid} 928 done 929 tcpdump_pids= 930 931 for pid in ${nettest_pids}; do 932 kill ${pid} 933 done 934 nettest_pids= 935 936 for pid in ${socat_pids}; do 937 kill "${pid}" 938 done 939 socat_pids= 940 941 cleanup_all_ns 942 943 ip link del veth_A-C 2>/dev/null 944 ip link del veth_A-R1 2>/dev/null 945 ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null 946 ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null 947 rm -f "$tmpoutfile" 948} 949 950mtu() { 951 ns_cmd="${1}" 952 dev="${2}" 953 mtu="${3}" 954 955 ${ns_cmd} ip link set dev ${dev} mtu ${mtu} 956} 957 958mtu_parse() { 959 input="${1}" 960 961 next=0 962 for i in ${input}; do 963 [ ${next} -eq 1 -a "${i}" = "lock" ] && next=2 && continue 964 [ ${next} -eq 1 ] && echo "${i}" && return 965 [ ${next} -eq 2 ] && echo "lock ${i}" && return 966 [ "${i}" = "mtu" ] && next=1 967 done 968} 969 970link_get() { 971 ns_cmd="${1}" 972 name="${2}" 973 974 ${ns_cmd} ip link show dev "${name}" 975} 976 977link_get_mtu() { 978 ns_cmd="${1}" 979 name="${2}" 980 981 mtu_parse "$(link_get "${ns_cmd}" ${name})" 982} 983 984route_get_dst_exception() { 985 ns_cmd="${1}" 986 dst="${2}" 987 dsfield="${3}" 988 989 if [ -z "${dsfield}" ]; then 990 dsfield=0 991 fi 992 993 ${ns_cmd} ip route get "${dst}" dsfield "${dsfield}" 994} 995 996route_get_dst_pmtu_from_exception() { 997 ns_cmd="${1}" 998 dst="${2}" 999 dsfield="${3}" 1000 1001 mtu_parse "$(route_get_dst_exception "${ns_cmd}" "${dst}" "${dsfield}")" 1002} 1003 1004check_pmtu_value() { 1005 expected="${1}" 1006 value="${2}" 1007 event="${3}" 1008 1009 [ "${expected}" = "any" ] && [ -n "${value}" ] && return 0 1010 [ "${value}" = "${expected}" ] && return 0 1011 [ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1 1012 [ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1 1013 err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}" 1014 return 1 1015} 1016 1017test_pmtu_ipvX() { 1018 family=${1} 1019 1020 setup namespaces routing || return $ksft_skip 1021 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1022 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1023 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1024 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1025 1026 if [ ${family} -eq 4 ]; then 1027 ping=ping 1028 dst1="${prefix4}.${b_r1}.1" 1029 dst2="${prefix4}.${b_r2}.1" 1030 else 1031 ping=${ping6} 1032 dst1="${prefix6}:${b_r1}::1" 1033 dst2="${prefix6}:${b_r2}::1" 1034 fi 1035 1036 # Set up initial MTU values 1037 mtu "${ns_a}" veth_A-R1 2000 1038 mtu "${ns_r1}" veth_R1-A 2000 1039 mtu "${ns_r1}" veth_R1-B 1400 1040 mtu "${ns_b}" veth_B-R1 1400 1041 1042 mtu "${ns_a}" veth_A-R2 2000 1043 mtu "${ns_r2}" veth_R2-A 2000 1044 mtu "${ns_r2}" veth_R2-B 1500 1045 mtu "${ns_b}" veth_B-R2 1500 1046 1047 # Create route exceptions 1048 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 1049 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 1050 1051 # Check that exceptions have been created with the correct PMTU 1052 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1053 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1054 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1055 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1056 1057 # Decrease local MTU below PMTU, check for PMTU decrease in route exception 1058 mtu "${ns_a}" veth_A-R1 1300 1059 mtu "${ns_r1}" veth_R1-A 1300 1060 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1061 check_pmtu_value "1300" "${pmtu_1}" "decreasing local MTU" || return 1 1062 # Second exception shouldn't be modified 1063 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1064 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1065 1066 # Increase MTU, check for PMTU increase in route exception 1067 mtu "${ns_a}" veth_A-R1 1700 1068 mtu "${ns_r1}" veth_R1-A 1700 1069 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1070 check_pmtu_value "1700" "${pmtu_1}" "increasing local MTU" || return 1 1071 # Second exception shouldn't be modified 1072 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1073 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1074 1075 # Skip PMTU locking tests for IPv6 1076 [ $family -eq 6 ] && return 0 1077 1078 # Decrease remote MTU on path via R2, get new exception 1079 mtu "${ns_r2}" veth_R2-B 400 1080 mtu "${ns_b}" veth_B-R2 400 1081 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1082 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1083 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1084 1085 # Decrease local MTU below PMTU 1086 mtu "${ns_a}" veth_A-R2 500 1087 mtu "${ns_r2}" veth_R2-A 500 1088 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1089 check_pmtu_value "500" "${pmtu_2}" "decreasing local MTU" || return 1 1090 1091 # Increase local MTU 1092 mtu "${ns_a}" veth_A-R2 1500 1093 mtu "${ns_r2}" veth_R2-A 1500 1094 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1095 check_pmtu_value "1500" "${pmtu_2}" "increasing local MTU" || return 1 1096 1097 # Get new exception 1098 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1099 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1100 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1101} 1102 1103test_pmtu_ipv4_exception() { 1104 test_pmtu_ipvX 4 1105} 1106 1107test_pmtu_ipv6_exception() { 1108 test_pmtu_ipvX 6 1109} 1110 1111test_pmtu_ipv4_dscp_icmp_exception() { 1112 rt_table=100 1113 1114 setup namespaces policy_routing || return $ksft_skip 1115 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1116 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1117 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1118 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1119 1120 # Set up initial MTU values 1121 mtu "${ns_a}" veth_A-R1 2000 1122 mtu "${ns_r1}" veth_R1-A 2000 1123 mtu "${ns_r1}" veth_R1-B 1400 1124 mtu "${ns_b}" veth_B-R1 1400 1125 1126 mtu "${ns_a}" veth_A-R2 2000 1127 mtu "${ns_r2}" veth_R2-A 2000 1128 mtu "${ns_r2}" veth_R2-B 1500 1129 mtu "${ns_b}" veth_B-R2 1500 1130 1131 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1132 1133 dst1="${prefix4}.${b_r1}.1" 1134 dst2="${prefix4}.${b_r2}.1" 1135 1136 # Create route exceptions 1137 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1138 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst1}" 1139 1140 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1141 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}" 1142 1143 # Check that exceptions have been created with the correct PMTU 1144 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" 1145 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1146 1147 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" 1148 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1149} 1150 1151test_pmtu_ipv4_dscp_udp_exception() { 1152 rt_table=100 1153 1154 if ! which socat > /dev/null 2>&1; then 1155 echo "'socat' command not found; skipping tests" 1156 return $ksft_skip 1157 fi 1158 1159 setup namespaces policy_routing || return $ksft_skip 1160 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1161 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1162 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1163 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1164 1165 # Set up initial MTU values 1166 mtu "${ns_a}" veth_A-R1 2000 1167 mtu "${ns_r1}" veth_R1-A 2000 1168 mtu "${ns_r1}" veth_R1-B 1400 1169 mtu "${ns_b}" veth_B-R1 1400 1170 1171 mtu "${ns_a}" veth_A-R2 2000 1172 mtu "${ns_r2}" veth_R2-A 2000 1173 mtu "${ns_r2}" veth_R2-B 1500 1174 mtu "${ns_b}" veth_B-R2 1500 1175 1176 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1177 1178 dst1="${prefix4}.${b_r1}.1" 1179 dst2="${prefix4}.${b_r2}.1" 1180 1181 # Create route exceptions 1182 run_cmd_bg "${ns_b}" socat UDP-LISTEN:50000 OPEN:/dev/null,wronly=1 1183 socat_pids="${socat_pids} $!" 1184 1185 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1186 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1187 UDP:"${dst1}":50000,tos="${dsfield}" 1188 1189 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1190 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1191 UDP:"${dst2}":50000,tos="${dsfield}" 1192 1193 # Check that exceptions have been created with the correct PMTU 1194 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" 1195 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1196 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" 1197 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1198} 1199 1200test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() { 1201 type=${1} 1202 family=${2} 1203 outer_family=${3} 1204 ll_mtu=4000 1205 1206 if [ ${outer_family} -eq 4 ]; then 1207 setup namespaces routing ${type}4 || return $ksft_skip 1208 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1209 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1210 else 1211 setup namespaces routing ${type}6 || return $ksft_skip 1212 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1213 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1214 fi 1215 1216 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1217 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1218 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1219 1220 if [ ${family} -eq 4 ]; then 1221 ping=ping 1222 dst=${tunnel4_b_addr} 1223 else 1224 ping=${ping6} 1225 dst=${tunnel6_b_addr} 1226 fi 1227 1228 # Create route exception by exceeding link layer MTU 1229 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1230 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1231 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1232 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1233 1234 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1235 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1236 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1237 1238 # Check that exception was created 1239 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1240 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface" 1241} 1242 1243test_pmtu_ipv4_vxlan4_exception() { 1244 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4 1245} 1246 1247test_pmtu_ipv6_vxlan4_exception() { 1248 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4 1249} 1250 1251test_pmtu_ipv4_geneve4_exception() { 1252 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4 1253} 1254 1255test_pmtu_ipv6_geneve4_exception() { 1256 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4 1257} 1258 1259test_pmtu_ipv4_vxlan6_exception() { 1260 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6 1261} 1262 1263test_pmtu_ipv6_vxlan6_exception() { 1264 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6 1265} 1266 1267test_pmtu_ipv4_geneve6_exception() { 1268 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6 1269} 1270 1271test_pmtu_ipv6_geneve6_exception() { 1272 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6 1273} 1274 1275test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() { 1276 type=${1} 1277 family=${2} 1278 outer_family=${3} 1279 ll_mtu=4000 1280 1281 if [ ${outer_family} -eq 4 ]; then 1282 setup namespaces routing bridge bridged_${type}4 || return $ksft_skip 1283 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1284 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1285 else 1286 setup namespaces routing bridge bridged_${type}6 || return $ksft_skip 1287 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1288 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1289 fi 1290 1291 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1292 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1293 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1294 "${ns_a}" br0 "${ns_a}" veth-A-C \ 1295 "${ns_c}" veth_C-A 1296 1297 if [ ${family} -eq 4 ]; then 1298 ping=ping 1299 dst=${tunnel4_b_addr} 1300 else 1301 ping=${ping6} 1302 dst=${tunnel6_b_addr} 1303 fi 1304 1305 # Create route exception by exceeding link layer MTU 1306 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1307 mtu "${ns_a}" br0 $((${ll_mtu} + 1000)) 1308 mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000)) 1309 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1310 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1311 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1312 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1313 1314 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1315 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1316 1317 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1 1318 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1 1319 1320 # Check that exceptions were created 1321 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1322 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface" 1323 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1324 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface" 1325 1326 tmpoutfile=$(mktemp) 1327 1328 # Flush Exceptions, retry with TCP 1329 run_cmd ${ns_a} ip route flush cached ${dst} 1330 run_cmd ${ns_b} ip route flush cached ${dst} 1331 run_cmd ${ns_c} ip route flush cached ${dst} 1332 1333 for target in "${ns_a}" "${ns_c}" ; do 1334 if [ ${family} -eq 4 ]; then 1335 TCPDST=TCP:${dst}:50000 1336 else 1337 TCPDST="TCP:[${dst}]:50000" 1338 fi 1339 ${ns_b} socat -T 3 -u -6 TCP-LISTEN:50000,reuseaddr STDOUT > $tmpoutfile & 1340 local socat_pid=$! 1341 1342 wait_local_port_listen ${NS_B} 50000 tcp 1343 1344 dd if=/dev/zero status=none bs=1M count=1 | ${target} socat -T 3 -u STDIN $TCPDST,connect-timeout=3 1345 1346 wait ${socat_pid} 1347 size=$(du -sb $tmpoutfile) 1348 size=${size%%/tmp/*} 1349 1350 [ $size -ne 1048576 ] && err "File size $size mismatches exepcted value in locally bridged vxlan test" && return 1 1351 done 1352 1353 rm -f "$tmpoutfile" 1354 1355 # Check that exceptions were created 1356 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1357 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp: exceeding link layer MTU on bridged ${type} interface" 1358 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1359 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp exceeding link layer MTU on locally bridged ${type} interface" 1360} 1361 1362test_pmtu_ipv4_br_vxlan4_exception() { 1363 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4 1364} 1365 1366test_pmtu_ipv6_br_vxlan4_exception() { 1367 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4 1368} 1369 1370test_pmtu_ipv4_br_geneve4_exception() { 1371 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4 1372} 1373 1374test_pmtu_ipv6_br_geneve4_exception() { 1375 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4 1376} 1377 1378test_pmtu_ipv4_br_vxlan6_exception() { 1379 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6 1380} 1381 1382test_pmtu_ipv6_br_vxlan6_exception() { 1383 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6 1384} 1385 1386test_pmtu_ipv4_br_geneve6_exception() { 1387 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6 1388} 1389 1390test_pmtu_ipv6_br_geneve6_exception() { 1391 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6 1392} 1393 1394test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() { 1395 type=${1} 1396 family=${2} 1397 outer_family=${3} 1398 ll_mtu=4000 1399 1400 if [ ${outer_family} -eq 4 ]; then 1401 setup namespaces routing ovs_bridge ovs_${type}4 || return $ksft_skip 1402 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1403 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1404 else 1405 setup namespaces routing ovs_bridge ovs_${type}6 || return $ksft_skip 1406 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1407 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1408 fi 1409 1410 if [ "${type}" = "vxlan" ]; then 1411 tun_a="vxlan_sys_4789" 1412 elif [ "${type}" = "geneve" ]; then 1413 tun_a="genev_sys_6081" 1414 fi 1415 1416 trace "" "${tun_a}" "${ns_b}" ${type}_b \ 1417 "" veth_A-R1 "${ns_r1}" veth_R1-A \ 1418 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1419 "" ovs_br0 "" veth-A-C \ 1420 "${ns_c}" veth_C-A 1421 1422 if [ ${family} -eq 4 ]; then 1423 ping=ping 1424 dst=${tunnel4_b_addr} 1425 else 1426 ping=${ping6} 1427 dst=${tunnel6_b_addr} 1428 fi 1429 1430 # Create route exception by exceeding link layer MTU 1431 mtu "" veth_A-R1 $((${ll_mtu} + 1000)) 1432 mtu "" ovs_br0 $((${ll_mtu} + 1000)) 1433 mtu "" veth_A-C $((${ll_mtu} + 1000)) 1434 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1435 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1436 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1437 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1438 1439 mtu "" ${tun_a} $((${ll_mtu} + 1000)) 1440 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1441 1442 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1 1443 1444 # Check that exceptions were created 1445 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1446 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface" 1447} 1448 1449test_pmtu_ipv4_ovs_vxlan4_exception() { 1450 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4 1451} 1452 1453test_pmtu_ipv6_ovs_vxlan4_exception() { 1454 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4 1455} 1456 1457test_pmtu_ipv4_ovs_geneve4_exception() { 1458 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4 1459} 1460 1461test_pmtu_ipv6_ovs_geneve4_exception() { 1462 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4 1463} 1464 1465test_pmtu_ipv4_ovs_vxlan6_exception() { 1466 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6 1467} 1468 1469test_pmtu_ipv6_ovs_vxlan6_exception() { 1470 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6 1471} 1472 1473test_pmtu_ipv4_ovs_geneve6_exception() { 1474 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6 1475} 1476 1477test_pmtu_ipv6_ovs_geneve6_exception() { 1478 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6 1479} 1480 1481test_pmtu_ipvX_over_fouY_or_gueY() { 1482 inner_family=${1} 1483 outer_family=${2} 1484 encap=${3} 1485 ll_mtu=4000 1486 1487 setup namespaces routing ${encap}${outer_family}${inner_family} || return $ksft_skip 1488 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1489 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1490 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1491 1492 if [ ${inner_family} -eq 4 ]; then 1493 ping=ping 1494 dst=${tunnel4_b_addr} 1495 else 1496 ping=${ping6} 1497 dst=${tunnel6_b_addr} 1498 fi 1499 1500 if [ "${encap}" = "gue" ]; then 1501 encap_overhead=4 1502 else 1503 encap_overhead=0 1504 fi 1505 1506 if [ ${outer_family} -eq 4 ]; then 1507 # IPv4 header UDP header 1508 exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead})) 1509 else 1510 # IPv6 header Option 4 UDP header 1511 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead})) 1512 fi 1513 1514 # Create route exception by exceeding link layer MTU 1515 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1516 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1517 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1518 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1519 1520 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1521 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1522 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1523 1524 # Check that exception was created 1525 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1526 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${encap} interface" 1527} 1528 1529test_pmtu_ipv4_fou4_exception() { 1530 test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou 1531} 1532 1533test_pmtu_ipv6_fou4_exception() { 1534 test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou 1535} 1536 1537test_pmtu_ipv4_fou6_exception() { 1538 test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou 1539} 1540 1541test_pmtu_ipv6_fou6_exception() { 1542 test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou 1543} 1544 1545test_pmtu_ipv4_gue4_exception() { 1546 test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue 1547} 1548 1549test_pmtu_ipv6_gue4_exception() { 1550 test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue 1551} 1552 1553test_pmtu_ipv4_gue6_exception() { 1554 test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue 1555} 1556 1557test_pmtu_ipv6_gue6_exception() { 1558 test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue 1559} 1560 1561test_pmtu_ipvX_over_ipvY_exception() { 1562 inner=${1} 1563 outer=${2} 1564 ll_mtu=4000 1565 1566 setup namespaces routing ip${inner}ip${outer} || return $ksft_skip 1567 1568 trace "${ns_a}" ip_a "${ns_b}" ip_b \ 1569 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1570 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1571 1572 if [ ${inner} -eq 4 ]; then 1573 ping=ping 1574 dst=${tunnel4_b_addr} 1575 else 1576 ping=${ping6} 1577 dst=${tunnel6_b_addr} 1578 fi 1579 1580 if [ ${outer} -eq 4 ]; then 1581 # IPv4 header 1582 exp_mtu=$((${ll_mtu} - 20)) 1583 else 1584 # IPv6 header Option 4 1585 exp_mtu=$((${ll_mtu} - 40 - 8)) 1586 fi 1587 1588 # Create route exception by exceeding link layer MTU 1589 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1590 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1591 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1592 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1593 1594 mtu "${ns_a}" ip_a $((${ll_mtu} + 1000)) || return 1595 mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return 1596 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1597 1598 # Check that exception was created 1599 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1600 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface" 1601} 1602 1603test_pmtu_ipv4_ipv4_exception() { 1604 test_pmtu_ipvX_over_ipvY_exception 4 4 1605} 1606 1607test_pmtu_ipv6_ipv4_exception() { 1608 test_pmtu_ipvX_over_ipvY_exception 6 4 1609} 1610 1611test_pmtu_ipv4_ipv6_exception() { 1612 test_pmtu_ipvX_over_ipvY_exception 4 6 1613} 1614 1615test_pmtu_ipv6_ipv6_exception() { 1616 test_pmtu_ipvX_over_ipvY_exception 6 6 1617} 1618 1619test_pmtu_vti4_exception() { 1620 setup namespaces veth vti4 xfrm4 || return $ksft_skip 1621 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1622 "${ns_a}" vti4_a "${ns_b}" vti4_b 1623 1624 veth_mtu=1500 1625 vti_mtu=$((veth_mtu - 20)) 1626 1627 # SPI SN IV ICV pad length next header 1628 esp_payload_rfc4106=$((vti_mtu - 4 - 4 - 8 - 16 - 1 - 1)) 1629 ping_payload=$((esp_payload_rfc4106 - 28)) 1630 1631 mtu "${ns_a}" veth_a ${veth_mtu} 1632 mtu "${ns_b}" veth_b ${veth_mtu} 1633 mtu "${ns_a}" vti4_a ${vti_mtu} 1634 mtu "${ns_b}" vti4_b ${vti_mtu} 1635 1636 # Send DF packet without exceeding link layer MTU, check that no 1637 # exception is created 1638 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1639 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1640 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1641 1642 # Now exceed link layer MTU by one byte, check that exception is created 1643 # with the right PMTU value 1644 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1645 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1646 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1647} 1648 1649test_pmtu_vti6_exception() { 1650 setup namespaces veth vti6 xfrm6 || return $ksft_skip 1651 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1652 "${ns_a}" vti6_a "${ns_b}" vti6_b 1653 fail=0 1654 1655 # Create route exception by exceeding link layer MTU 1656 mtu "${ns_a}" veth_a 4000 1657 mtu "${ns_b}" veth_b 4000 1658 mtu "${ns_a}" vti6_a 5000 1659 mtu "${ns_b}" vti6_b 5000 1660 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1661 1662 # Check that exception was created 1663 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1664 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1665 1666 # Decrease tunnel MTU, check for PMTU decrease in route exception 1667 mtu "${ns_a}" vti6_a 3000 1668 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1669 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1670 1671 # Increase tunnel MTU, check for PMTU increase in route exception 1672 mtu "${ns_a}" vti6_a 9000 1673 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1674 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1675 1676 return ${fail} 1677} 1678 1679test_pmtu_vti4_udp_exception() { 1680 setup namespaces veth vti4 xfrm4udp || return $ksft_skip 1681 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1682 "${ns_a}" vti4_a "${ns_b}" vti4_b 1683 1684 veth_mtu=1500 1685 vti_mtu=$((veth_mtu - 20)) 1686 1687 # UDP SPI SN IV ICV pad length next header 1688 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1689 ping_payload=$((esp_payload_rfc4106 - 28)) 1690 1691 mtu "${ns_a}" veth_a ${veth_mtu} 1692 mtu "${ns_b}" veth_b ${veth_mtu} 1693 mtu "${ns_a}" vti4_a ${vti_mtu} 1694 mtu "${ns_b}" vti4_b ${vti_mtu} 1695 1696 # Send DF packet without exceeding link layer MTU, check that no 1697 # exception is created 1698 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1699 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1700 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1701 1702 # Now exceed link layer MTU by one byte, check that exception is created 1703 # with the right PMTU value 1704 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1705 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1706 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1707} 1708 1709test_pmtu_vti6_udp_exception() { 1710 setup namespaces veth vti6 xfrm6udp || return $ksft_skip 1711 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1712 "${ns_a}" vti6_a "${ns_b}" vti6_b 1713 fail=0 1714 1715 # Create route exception by exceeding link layer MTU 1716 mtu "${ns_a}" veth_a 4000 1717 mtu "${ns_b}" veth_b 4000 1718 mtu "${ns_a}" vti6_a 5000 1719 mtu "${ns_b}" vti6_b 5000 1720 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1721 1722 # Check that exception was created 1723 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1724 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1725 1726 # Decrease tunnel MTU, check for PMTU decrease in route exception 1727 mtu "${ns_a}" vti6_a 3000 1728 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1729 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1730 1731 # Increase tunnel MTU, check for PMTU increase in route exception 1732 mtu "${ns_a}" vti6_a 9000 1733 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1734 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1735 1736 return ${fail} 1737} 1738 1739test_pmtu_vti4_udp_routed_exception() { 1740 setup namespaces routing vti4routed xfrm4udprouted || return $ksft_skip 1741 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1742 "${ns_a}" vti4_a "${ns_b}" vti4_b 1743 1744 veth_mtu=1500 1745 vti_mtu=$((veth_mtu - 20)) 1746 1747 # UDP SPI SN IV ICV pad length next header 1748 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1749 ping_payload=$((esp_payload_rfc4106 - 28)) 1750 1751 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1752 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1753 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1754 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1755 1756 mtu "${ns_a}" vti4_a ${vti_mtu} 1757 mtu "${ns_b}" vti4_b ${vti_mtu} 1758 1759 # Send DF packet without exceeding link layer MTU, check that no 1760 # exception is created 1761 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1762 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1763 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1764 1765 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1766 # with the right PMTU value 1767 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1768 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel4_b_addr} 1769 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1770 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1771} 1772 1773test_pmtu_vti6_udp_routed_exception() { 1774 setup namespaces routing vti6routed xfrm6udprouted || return $ksft_skip 1775 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1776 "${ns_a}" vti6_a "${ns_b}" vti6_b 1777 1778 veth_mtu=1500 1779 vti_mtu=$((veth_mtu - 40)) 1780 1781 # UDP SPI SN IV ICV pad length next header 1782 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1783 ping_payload=$((esp_payload_rfc4106 - 48)) 1784 1785 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1786 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1787 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1788 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1789 1790 # mtu "${ns_a}" vti6_a ${vti_mtu} 1791 # mtu "${ns_b}" vti6_b ${vti_mtu} 1792 1793 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel6_b_addr} 1794 1795 # Check that exception was not created 1796 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1797 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1798 1799 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1800 # with the right PMTU value 1801 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1802 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel6_b_addr} 1803 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1804 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1805 1806} 1807 1808test_pmtu_vti4_default_mtu() { 1809 setup namespaces veth vti4 || return $ksft_skip 1810 1811 # Check that MTU of vti device is MTU of veth minus IPv4 header length 1812 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1813 vti4_mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1814 if [ $((veth_mtu - vti4_mtu)) -ne 20 ]; then 1815 err " vti MTU ${vti4_mtu} is not veth MTU ${veth_mtu} minus IPv4 header length" 1816 return 1 1817 fi 1818} 1819 1820test_pmtu_vti6_default_mtu() { 1821 setup namespaces veth vti6 || return $ksft_skip 1822 1823 # Check that MTU of vti device is MTU of veth minus IPv6 header length 1824 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1825 vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1826 if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then 1827 err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length" 1828 return 1 1829 fi 1830} 1831 1832test_pmtu_vti4_link_add_mtu() { 1833 setup namespaces || return $ksft_skip 1834 1835 run_cmd ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1836 [ $? -ne 0 ] && err " vti not supported" && return $ksft_skip 1837 run_cmd ${ns_a} ip link del vti4_a 1838 1839 fail=0 1840 1841 min=68 1842 max=$((65535 - 20)) 1843 # Check invalid values first 1844 for v in $((min - 1)) $((max + 1)); do 1845 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1846 # This can fail, or MTU can be adjusted to a proper value 1847 [ $? -ne 0 ] && continue 1848 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1849 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1850 err " vti tunnel created with invalid MTU ${mtu}" 1851 fail=1 1852 fi 1853 run_cmd ${ns_a} ip link del vti4_a 1854 done 1855 1856 # Now check valid values 1857 for v in ${min} 1300 ${max}; do 1858 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1859 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1860 run_cmd ${ns_a} ip link del vti4_a 1861 if [ "${mtu}" != "${v}" ]; then 1862 err " vti MTU ${mtu} doesn't match configured value ${v}" 1863 fail=1 1864 fi 1865 done 1866 1867 return ${fail} 1868} 1869 1870test_pmtu_vti6_link_add_mtu() { 1871 setup namespaces || return $ksft_skip 1872 1873 run_cmd ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1874 [ $? -ne 0 ] && err " vti6 not supported" && return $ksft_skip 1875 run_cmd ${ns_a} ip link del vti6_a 1876 1877 fail=0 1878 1879 min=68 # vti6 can carry IPv4 packets too 1880 max=$((65535 - 40)) 1881 # Check invalid values first 1882 for v in $((min - 1)) $((max + 1)); do 1883 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1884 # This can fail, or MTU can be adjusted to a proper value 1885 [ $? -ne 0 ] && continue 1886 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1887 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1888 err " vti6 tunnel created with invalid MTU ${v}" 1889 fail=1 1890 fi 1891 run_cmd ${ns_a} ip link del vti6_a 1892 done 1893 1894 # Now check valid values 1895 for v in 68 1280 1300 $((65535 - 40)); do 1896 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1897 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1898 run_cmd ${ns_a} ip link del vti6_a 1899 if [ "${mtu}" != "${v}" ]; then 1900 err " vti6 MTU ${mtu} doesn't match configured value ${v}" 1901 fail=1 1902 fi 1903 done 1904 1905 return ${fail} 1906} 1907 1908test_pmtu_vti6_link_change_mtu() { 1909 setup namespaces || return $ksft_skip 1910 1911 run_cmd ${ns_a} ip link add dummy0 mtu 1500 type dummy 1912 [ $? -ne 0 ] && err " dummy not supported" && return $ksft_skip 1913 run_cmd ${ns_a} ip link add dummy1 mtu 3000 type dummy 1914 run_cmd ${ns_a} ip link set dummy0 up 1915 run_cmd ${ns_a} ip link set dummy1 up 1916 1917 run_cmd ${ns_a} ip addr add ${dummy6_0_prefix}1/${dummy6_mask} dev dummy0 1918 run_cmd ${ns_a} ip addr add ${dummy6_1_prefix}1/${dummy6_mask} dev dummy1 1919 1920 fail=0 1921 1922 # Create vti6 interface bound to device, passing MTU, check it 1923 run_cmd ${ns_a} ip link add vti6_a mtu 1300 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1924 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1925 if [ ${mtu} -ne 1300 ]; then 1926 err " vti6 MTU ${mtu} doesn't match configured value 1300" 1927 fail=1 1928 fi 1929 1930 # Move to another device with different MTU, without passing MTU, check 1931 # MTU is adjusted 1932 run_cmd ${ns_a} ip link set vti6_a type vti6 remote ${dummy6_1_prefix}2 local ${dummy6_1_prefix}1 1933 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1934 if [ ${mtu} -ne $((3000 - 40)) ]; then 1935 err " vti MTU ${mtu} is not dummy MTU 3000 minus IPv6 header length" 1936 fail=1 1937 fi 1938 1939 # Move it back, passing MTU, check MTU is not overridden 1940 run_cmd ${ns_a} ip link set vti6_a mtu 1280 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1941 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1942 if [ ${mtu} -ne 1280 ]; then 1943 err " vti6 MTU ${mtu} doesn't match configured value 1280" 1944 fail=1 1945 fi 1946 1947 return ${fail} 1948} 1949 1950check_command() { 1951 cmd=${1} 1952 1953 if ! which ${cmd} > /dev/null 2>&1; then 1954 err " missing required command: '${cmd}'" 1955 return 1 1956 fi 1957 return 0 1958} 1959 1960check_running() { 1961 pid=${1} 1962 cmd=${2} 1963 1964 [ "$(cat /proc/${pid}/cmdline 2>/dev/null | tr -d '\0')" = "{cmd}" ] 1965} 1966 1967test_cleanup_vxlanX_exception() { 1968 outer="${1}" 1969 encap="vxlan" 1970 ll_mtu=4000 1971 1972 check_command taskset || return $ksft_skip 1973 cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) 1974 1975 setup namespaces routing ${encap}${outer} || return $ksft_skip 1976 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1977 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1978 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1979 1980 # Create route exception by exceeding link layer MTU 1981 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1982 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1983 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1984 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1985 1986 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1987 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1988 1989 # Fill exception cache for multiple CPUs (2) 1990 # we can always use inner IPv4 for that 1991 for cpu in ${cpu_list}; do 1992 run_cmd taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr} 1993 done 1994 1995 ${ns_a} ip link del dev veth_A-R1 & 1996 iplink_pid=$! 1997 for i in $(seq 1 20); do 1998 check_running ${iplink_pid} "iplinkdeldevveth_A-R1" || return 0 1999 sleep 0.1 2000 done 2001 err " can't delete veth device in a timely manner, PMTU dst likely leaked" 2002 return 1 2003} 2004 2005test_cleanup_ipv6_exception() { 2006 test_cleanup_vxlanX_exception 6 2007} 2008 2009test_cleanup_ipv4_exception() { 2010 test_cleanup_vxlanX_exception 4 2011} 2012 2013run_test() { 2014 ( 2015 tname="$1" 2016 tdesc="$2" 2017 2018 unset IFS 2019 2020 # Since cleanup() relies on variables modified by this subshell, it 2021 # has to run in this context. 2022 trap cleanup EXIT 2023 2024 if [ "$VERBOSE" = "1" ]; then 2025 printf "\n##########################################################################\n\n" 2026 fi 2027 2028 eval test_${tname} 2029 ret=$? 2030 2031 if [ $ret -eq 0 ]; then 2032 printf "TEST: %-60s [ OK ]\n" "${tdesc}" 2033 elif [ $ret -eq 1 ]; then 2034 printf "TEST: %-60s [FAIL]\n" "${tdesc}" 2035 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 2036 echo 2037 echo "Pausing. Hit enter to continue" 2038 read a 2039 fi 2040 err_flush 2041 exit 1 2042 elif [ $ret -eq $ksft_skip ]; then 2043 printf "TEST: %-60s [SKIP]\n" "${tdesc}" 2044 err_flush 2045 fi 2046 2047 return $ret 2048 ) 2049 ret=$? 2050 case $ret in 2051 0) 2052 all_skipped=false 2053 [ $exitcode -eq $ksft_skip ] && exitcode=0 2054 ;; 2055 $ksft_skip) 2056 [ $all_skipped = true ] && exitcode=$ksft_skip 2057 ;; 2058 *) 2059 all_skipped=false 2060 exitcode=1 2061 ;; 2062 esac 2063 2064 return $ret 2065} 2066 2067run_test_nh() { 2068 tname="$1" 2069 tdesc="$2" 2070 2071 USE_NH=yes 2072 run_test "${tname}" "${tdesc} - nexthop objects" 2073 USE_NH=no 2074} 2075 2076test_list_flush_ipv4_exception() { 2077 setup namespaces routing || return $ksft_skip 2078 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2079 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2080 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2081 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2082 2083 dst_prefix1="${prefix4}.${b_r1}." 2084 dst2="${prefix4}.${b_r2}.1" 2085 2086 # Set up initial MTU values 2087 mtu "${ns_a}" veth_A-R1 2000 2088 mtu "${ns_r1}" veth_R1-A 2000 2089 mtu "${ns_r1}" veth_R1-B 1500 2090 mtu "${ns_b}" veth_B-R1 1500 2091 2092 mtu "${ns_a}" veth_A-R2 2000 2093 mtu "${ns_r2}" veth_R2-A 2000 2094 mtu "${ns_r2}" veth_R2-B 1500 2095 mtu "${ns_b}" veth_B-R2 1500 2096 2097 fail=0 2098 2099 # Add 100 addresses for veth endpoint on B reached by default A route 2100 for i in $(seq 100 199); do 2101 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2102 done 2103 2104 # Create 100 cached route exceptions for path via R1, one via R2. Note 2105 # that with IPv4 we need to actually cause a route lookup that matches 2106 # the exception caused by ICMP, in order to actually have a cached 2107 # route, so we need to ping each destination twice 2108 for i in $(seq 100 199); do 2109 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}" 2110 done 2111 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}" 2112 2113 if [ "$(${ns_a} ip -oneline route list cache | wc -l)" -ne 101 ]; then 2114 err " can't list cached exceptions" 2115 fail=1 2116 fi 2117 2118 run_cmd ${ns_a} ip route flush cache 2119 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)" 2120 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)" 2121 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2122 [ -n "$(${ns_a} ip route list cache)" ]; then 2123 err " can't flush cached exceptions" 2124 fail=1 2125 fi 2126 2127 return ${fail} 2128} 2129 2130test_list_flush_ipv6_exception() { 2131 setup namespaces routing || return $ksft_skip 2132 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2133 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2134 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2135 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2136 2137 dst_prefix1="${prefix6}:${b_r1}::" 2138 dst2="${prefix6}:${b_r2}::1" 2139 2140 # Set up initial MTU values 2141 mtu "${ns_a}" veth_A-R1 2000 2142 mtu "${ns_r1}" veth_R1-A 2000 2143 mtu "${ns_r1}" veth_R1-B 1500 2144 mtu "${ns_b}" veth_B-R1 1500 2145 2146 mtu "${ns_a}" veth_A-R2 2000 2147 mtu "${ns_r2}" veth_R2-A 2000 2148 mtu "${ns_r2}" veth_R2-B 1500 2149 mtu "${ns_b}" veth_B-R2 1500 2150 2151 fail=0 2152 2153 # Add 100 addresses for veth endpoint on B reached by default A route 2154 for i in $(seq 100 199); do 2155 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2156 done 2157 2158 # Create 100 cached route exceptions for path via R1, one via R2 2159 for i in $(seq 100 199); do 2160 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}" 2161 done 2162 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}" 2163 if [ "$(${ns_a} ip -oneline -6 route list cache | wc -l)" -ne 101 ]; then 2164 err " can't list cached exceptions" 2165 fail=1 2166 fi 2167 2168 run_cmd ${ns_a} ip -6 route flush cache 2169 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")" 2170 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2171 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2172 [ -n "$(${ns_a} ip -6 route list cache)" ]; then 2173 err " can't flush cached exceptions" 2174 fail=1 2175 fi 2176 2177 return ${fail} 2178} 2179 2180test_pmtu_ipvX_route_change() { 2181 family=${1} 2182 2183 setup namespaces routing || return 2 2184 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2185 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2186 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2187 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2188 2189 if [ ${family} -eq 4 ]; then 2190 ping=ping 2191 dst1="${prefix4}.${b_r1}.1" 2192 dst2="${prefix4}.${b_r2}.1" 2193 gw="${prefix4}.${a_r1}.2" 2194 else 2195 ping=${ping6} 2196 dst1="${prefix6}:${b_r1}::1" 2197 dst2="${prefix6}:${b_r2}::1" 2198 gw="${prefix6}:${a_r1}::2" 2199 fi 2200 2201 # Set up initial MTU values 2202 mtu "${ns_a}" veth_A-R1 2000 2203 mtu "${ns_r1}" veth_R1-A 2000 2204 mtu "${ns_r1}" veth_R1-B 1400 2205 mtu "${ns_b}" veth_B-R1 1400 2206 2207 mtu "${ns_a}" veth_A-R2 2000 2208 mtu "${ns_r2}" veth_R2-A 2000 2209 mtu "${ns_r2}" veth_R2-B 1500 2210 mtu "${ns_b}" veth_B-R2 1500 2211 2212 # Create route exceptions 2213 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 2214 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 2215 2216 # Check that exceptions have been created with the correct PMTU 2217 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 2218 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 2219 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2220 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 2221 2222 # Replace the route from A to R1 2223 run_cmd ${ns_a} ip route change default via ${gw} 2224 2225 # Delete the device in A 2226 run_cmd ${ns_a} ip link del "veth_A-R1" 2227} 2228 2229test_pmtu_ipv4_route_change() { 2230 test_pmtu_ipvX_route_change 4 2231} 2232 2233test_pmtu_ipv6_route_change() { 2234 test_pmtu_ipvX_route_change 6 2235} 2236 2237usage() { 2238 echo 2239 echo "$0 [OPTIONS] [TEST]..." 2240 echo "If no TEST argument is given, all tests will be run." 2241 echo 2242 echo "Options" 2243 echo " --trace: capture traffic to TEST_INTERFACE.pcap" 2244 echo 2245 echo "Available tests${tests}" 2246 exit 1 2247} 2248 2249################################################################################ 2250# 2251exitcode=0 2252desc=0 2253all_skipped=true 2254 2255while getopts :ptv o 2256do 2257 case $o in 2258 p) PAUSE_ON_FAIL=yes;; 2259 v) VERBOSE=1;; 2260 t) if which tcpdump > /dev/null 2>&1; then 2261 TRACING=1 2262 else 2263 echo "=== tcpdump not available, tracing disabled" 2264 fi 2265 ;; 2266 *) usage;; 2267 esac 2268done 2269shift $(($OPTIND-1)) 2270 2271IFS=" 2272" 2273 2274for arg do 2275 # Check first that all requested tests are available before running any 2276 command -v > /dev/null "test_${arg}" || { echo "=== Test ${arg} not found"; usage; } 2277done 2278 2279trap cleanup EXIT 2280 2281# start clean 2282cleanup 2283 2284HAVE_NH=no 2285ip nexthop ls >/dev/null 2>&1 2286[ $? -eq 0 ] && HAVE_NH=yes 2287 2288name="" 2289desc="" 2290rerun_nh=0 2291for t in ${tests}; do 2292 [ "${name}" = "" ] && name="${t}" && continue 2293 [ "${desc}" = "" ] && desc="${t}" && continue 2294 2295 if [ "${HAVE_NH}" = "yes" ]; then 2296 rerun_nh="${t}" 2297 fi 2298 2299 run_this=1 2300 for arg do 2301 [ "${arg}" != "${arg#--*}" ] && continue 2302 [ "${arg}" = "${name}" ] && run_this=1 && break 2303 run_this=0 2304 done 2305 if [ $run_this -eq 1 ]; then 2306 run_test "${name}" "${desc}" 2307 # if test was skipped no need to retry with nexthop objects 2308 [ $? -eq $ksft_skip ] && rerun_nh=0 2309 2310 if [ "${rerun_nh}" = "1" ]; then 2311 run_test_nh "${name}" "${desc}" 2312 fi 2313 fi 2314 name="" 2315 desc="" 2316 rerun_nh=0 2317done 2318 2319exit ${exitcode} 2320