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