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# 201# - pmtu_ipv4_mp_exceptions 202# Use the same topology as in pmtu_ipv4, but add routeable addresses 203# on host A and B on lo reachable via both routers. Host A and B 204# addresses have multipath routes to each other, b_r1 mtu = 1500. 205# Check that PMTU exceptions are created for both paths. 206 207source lib.sh 208source net_helper.sh 209 210PAUSE_ON_FAIL=no 211VERBOSE=0 212TRACING=0 213 214# Some systems don't have a ping6 binary anymore 215which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) 216 217# Name Description re-run with nh 218tests=" 219 pmtu_ipv4_exception ipv4: PMTU exceptions 1 220 pmtu_ipv6_exception ipv6: PMTU exceptions 1 221 pmtu_ipv4_dscp_icmp_exception ICMPv4 with DSCP and ECN: PMTU exceptions 1 222 pmtu_ipv4_dscp_udp_exception UDPv4 with DSCP and ECN: PMTU exceptions 1 223 pmtu_ipv4_vxlan4_exception IPv4 over vxlan4: PMTU exceptions 1 224 pmtu_ipv6_vxlan4_exception IPv6 over vxlan4: PMTU exceptions 1 225 pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions 1 226 pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: PMTU exceptions 1 227 pmtu_ipv4_geneve4_exception IPv4 over geneve4: PMTU exceptions 1 228 pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions 1 229 pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions 1 230 pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions 1 231 pmtu_ipv4_br_vxlan4_exception IPv4, bridged vxlan4: PMTU exceptions 1 232 pmtu_ipv6_br_vxlan4_exception IPv6, bridged vxlan4: PMTU exceptions 1 233 pmtu_ipv4_br_vxlan6_exception IPv4, bridged vxlan6: PMTU exceptions 1 234 pmtu_ipv6_br_vxlan6_exception IPv6, bridged vxlan6: PMTU exceptions 1 235 pmtu_ipv4_br_geneve4_exception IPv4, bridged geneve4: PMTU exceptions 1 236 pmtu_ipv6_br_geneve4_exception IPv6, bridged geneve4: PMTU exceptions 1 237 pmtu_ipv4_br_geneve6_exception IPv4, bridged geneve6: PMTU exceptions 1 238 pmtu_ipv6_br_geneve6_exception IPv6, bridged geneve6: PMTU exceptions 1 239 pmtu_ipv4_ovs_vxlan4_exception IPv4, OVS vxlan4: PMTU exceptions 1 240 pmtu_ipv6_ovs_vxlan4_exception IPv6, OVS vxlan4: PMTU exceptions 1 241 pmtu_ipv4_ovs_vxlan6_exception IPv4, OVS vxlan6: PMTU exceptions 1 242 pmtu_ipv6_ovs_vxlan6_exception IPv6, OVS vxlan6: PMTU exceptions 1 243 pmtu_ipv4_ovs_geneve4_exception IPv4, OVS geneve4: PMTU exceptions 1 244 pmtu_ipv6_ovs_geneve4_exception IPv6, OVS geneve4: PMTU exceptions 1 245 pmtu_ipv4_ovs_geneve6_exception IPv4, OVS geneve6: PMTU exceptions 1 246 pmtu_ipv6_ovs_geneve6_exception IPv6, OVS geneve6: PMTU exceptions 1 247 pmtu_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions 1 248 pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions 1 249 pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions 1 250 pmtu_ipv6_fou6_exception IPv6 over fou6: PMTU exceptions 1 251 pmtu_ipv4_gue4_exception IPv4 over gue4: PMTU exceptions 1 252 pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions 1 253 pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions 1 254 pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions 1 255 pmtu_ipv4_ipv4_exception IPv4 over IPv4: PMTU exceptions 1 256 pmtu_ipv6_ipv4_exception IPv6 over IPv4: PMTU exceptions 1 257 pmtu_ipv4_ipv6_exception IPv4 over IPv6: PMTU exceptions 1 258 pmtu_ipv6_ipv6_exception IPv6 over IPv6: PMTU exceptions 1 259 pmtu_vti6_exception vti6: PMTU exceptions 0 260 pmtu_vti4_exception vti4: PMTU exceptions 0 261 pmtu_vti6_udp_exception vti6: PMTU exceptions (ESP-in-UDP) 0 262 pmtu_vti4_udp_exception vti4: PMTU exceptions (ESP-in-UDP) 0 263 pmtu_vti6_udp_routed_exception vti6: PMTU exceptions, routed (ESP-in-UDP) 0 264 pmtu_vti4_udp_routed_exception vti4: PMTU exceptions, routed (ESP-in-UDP) 0 265 pmtu_vti4_default_mtu vti4: default MTU assignment 0 266 pmtu_vti6_default_mtu vti6: default MTU assignment 0 267 pmtu_vti4_link_add_mtu vti4: MTU setting on link creation 0 268 pmtu_vti6_link_add_mtu vti6: MTU setting on link creation 0 269 pmtu_vti6_link_change_mtu vti6: MTU changes on link changes 0 270 cleanup_ipv4_exception ipv4: cleanup of cached exceptions 1 271 cleanup_ipv6_exception ipv6: cleanup of cached exceptions 1 272 list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 273 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 274 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 275 pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 276 pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 1" 277 278# Addressing and routing for tests with routers: four network segments, with 279# index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an 280# identifier ID, which is 1 for hosts (A and B), 2 for routers (R1 and R2). 281# Addresses are: 282# - IPv4: PREFIX4.SEGMENT.ID (/24) 283# - IPv6: PREFIX6:SEGMENT::ID (/64) 284prefix4="10.0" 285prefix6="fc00" 286a_r1=1 287a_r2=2 288b_r1=3 289b_r2=4 290# ns peer segment 291routing_addrs=" 292 A R1 ${a_r1} 293 A R2 ${a_r2} 294 B R1 ${b_r1} 295 B R2 ${b_r2} 296" 297# Traffic from A to B goes through R1 by default, and through R2, if destined to 298# B's address on the b_r2 segment. 299# Traffic from B to A goes through R1. 300# ns destination gateway 301routes=" 302 A default ${prefix4}.${a_r1}.2 303 A ${prefix4}.${b_r2}.1 ${prefix4}.${a_r2}.2 304 B default ${prefix4}.${b_r1}.2 305 306 A default ${prefix6}:${a_r1}::2 307 A ${prefix6}:${b_r2}::1 ${prefix6}:${a_r2}::2 308 B default ${prefix6}:${b_r1}::2 309" 310USE_NH="no" 311# ns family nh id destination gateway 312nexthops=" 313 A 4 41 ${prefix4}.${a_r1}.2 veth_A-R1 314 A 4 42 ${prefix4}.${a_r2}.2 veth_A-R2 315 B 4 41 ${prefix4}.${b_r1}.2 veth_B-R1 316 317 A 6 61 ${prefix6}:${a_r1}::2 veth_A-R1 318 A 6 62 ${prefix6}:${a_r2}::2 veth_A-R2 319 B 6 61 ${prefix6}:${b_r1}::2 veth_B-R1 320" 321 322# nexthop id correlates to id in nexthops config above 323# ns family prefix nh id 324routes_nh=" 325 A 4 default 41 326 A 4 ${prefix4}.${b_r2}.1 42 327 B 4 default 41 328 329 A 6 default 61 330 A 6 ${prefix6}:${b_r2}::1 62 331 B 6 default 61 332" 333 334policy_mark=0x04 335rt_table=main 336 337veth4_a_addr="192.168.1.1" 338veth4_b_addr="192.168.1.2" 339veth4_c_addr="192.168.2.10" 340veth4_mask="24" 341veth6_a_addr="fd00:1::a" 342veth6_b_addr="fd00:1::b" 343veth6_c_addr="fd00:2::c" 344veth6_mask="64" 345 346tunnel4_a_addr="192.168.2.1" 347tunnel4_b_addr="192.168.2.2" 348tunnel4_mask="24" 349tunnel6_a_addr="fd00:2::a" 350tunnel6_b_addr="fd00:2::b" 351tunnel6_mask="64" 352 353host4_a_addr="192.168.99.99" 354host4_b_addr="192.168.88.88" 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 setup_ns NS_A NS_B NS_C NS_R1 NS_R2 547 for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do 548 # Disable DAD, so that we don't have to wait to use the 549 # configured IPv6 addresses 550 ip netns exec ${n} sysctl -q net/ipv6/conf/default/accept_dad=0 551 done 552 ns_a="ip netns exec ${NS_A}" 553 ns_b="ip netns exec ${NS_B}" 554 ns_c="ip netns exec ${NS_C}" 555 ns_r1="ip netns exec ${NS_R1}" 556 ns_r2="ip netns exec ${NS_R2}" 557} 558 559setup_veth() { 560 run_cmd ${ns_a} ip link add veth_a type veth peer name veth_b || return 1 561 run_cmd ${ns_a} ip link set veth_b netns ${NS_B} 562 563 run_cmd ${ns_a} ip addr add ${veth4_a_addr}/${veth4_mask} dev veth_a 564 run_cmd ${ns_b} ip addr add ${veth4_b_addr}/${veth4_mask} dev veth_b 565 566 run_cmd ${ns_a} ip addr add ${veth6_a_addr}/${veth6_mask} dev veth_a 567 run_cmd ${ns_b} ip addr add ${veth6_b_addr}/${veth6_mask} dev veth_b 568 569 run_cmd ${ns_a} ip link set veth_a up 570 run_cmd ${ns_b} ip link set veth_b up 571} 572 573setup_vti() { 574 proto=${1} 575 veth_a_addr="${2}" 576 veth_b_addr="${3}" 577 vti_a_addr="${4}" 578 vti_b_addr="${5}" 579 vti_mask=${6} 580 581 [ ${proto} -eq 6 ] && vti_type="vti6" || vti_type="vti" 582 583 run_cmd ${ns_a} ip link add vti${proto}_a type ${vti_type} local ${veth_a_addr} remote ${veth_b_addr} key 10 || return 1 584 run_cmd ${ns_b} ip link add vti${proto}_b type ${vti_type} local ${veth_b_addr} remote ${veth_a_addr} key 10 585 586 run_cmd ${ns_a} ip addr add ${vti_a_addr}/${vti_mask} dev vti${proto}_a 587 run_cmd ${ns_b} ip addr add ${vti_b_addr}/${vti_mask} dev vti${proto}_b 588 589 run_cmd ${ns_a} ip link set vti${proto}_a up 590 run_cmd ${ns_b} ip link set vti${proto}_b up 591} 592 593setup_vti4() { 594 setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 595} 596 597setup_vti6() { 598 setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 599} 600 601setup_vti4routed() { 602 setup_vti 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask} 603} 604 605setup_vti6routed() { 606 setup_vti 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask} 607} 608 609setup_vxlan_or_geneve() { 610 type="${1}" 611 a_addr="${2}" 612 b_addr="${3}" 613 opts="${4}" 614 br_if_a="${5}" 615 616 if [ "${type}" = "vxlan" ]; then 617 opts="${opts} ttl 64 dstport 4789" 618 opts_a="local ${a_addr}" 619 opts_b="local ${b_addr}" 620 else 621 opts_a="" 622 opts_b="" 623 fi 624 625 run_cmd ${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1 626 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} 627 628 if [ -n "${br_if_a}" ]; then 629 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${br_if_a} 630 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${br_if_a} 631 run_cmd ${ns_a} ip link set ${type}_a master ${br_if_a} 632 else 633 run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a 634 run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a 635 fi 636 637 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 638 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 639 640 run_cmd ${ns_a} ip link set ${type}_a up 641 run_cmd ${ns_b} ip link set ${type}_b up 642} 643 644setup_geneve4() { 645 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 646} 647 648setup_vxlan4() { 649 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" 650} 651 652setup_geneve6() { 653 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 654} 655 656setup_vxlan6() { 657 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" 658} 659 660setup_bridged_geneve4() { 661 setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 662} 663 664setup_bridged_vxlan4() { 665 setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0" 666} 667 668setup_bridged_geneve6() { 669 setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 670} 671 672setup_bridged_vxlan6() { 673 setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0" 674} 675 676setup_xfrm() { 677 proto=${1} 678 veth_a_addr="${2}" 679 veth_b_addr="${3}" 680 encap=${4} 681 682 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 1 683 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} 684 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 685 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 686 687 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} 688 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} 689 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 690 run_cmd ${ns_b} ip -${proto} xfrm policy add dir in mark 10 tmpl src ${veth_a_addr} dst ${veth_b_addr} proto esp mode tunnel 691} 692 693setup_nettest_xfrm() { 694 if ! which nettest >/dev/null; then 695 PATH=$PWD:$PATH 696 if ! which nettest >/dev/null; then 697 echo "'nettest' command not found; skipping tests" 698 return 1 699 fi 700 fi 701 702 [ ${1} -eq 6 ] && proto="-6" || proto="" 703 port=${2} 704 705 run_cmd_bg "${ns_a}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5 706 nettest_pids="${nettest_pids} $!" 707 708 run_cmd_bg "${ns_b}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5 709 nettest_pids="${nettest_pids} $!" 710} 711 712setup_xfrm4() { 713 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} 714} 715 716setup_xfrm6() { 717 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} 718} 719 720setup_xfrm4udp() { 721 setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr} "encap espinudp 4500 4500 0.0.0.0" && \ 722 setup_nettest_xfrm 4 4500 723} 724 725setup_xfrm6udp() { 726 setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr} "encap espinudp 4500 4500 0.0.0.0" && \ 727 setup_nettest_xfrm 6 4500 728} 729 730setup_xfrm4udprouted() { 731 setup_xfrm 4 ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "encap espinudp 4500 4500 0.0.0.0" && \ 732 setup_nettest_xfrm 4 4500 733} 734 735setup_xfrm6udprouted() { 736 setup_xfrm 6 ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "encap espinudp 4500 4500 0.0.0.0" && \ 737 setup_nettest_xfrm 6 4500 738} 739 740setup_routing_old() { 741 for i in ${routes}; do 742 [ "${ns}" = "" ] && ns="${i}" && continue 743 [ "${addr}" = "" ] && addr="${i}" && continue 744 [ "${gw}" = "" ] && gw="${i}" 745 746 ns_name="$(nsname ${ns})" 747 748 ip -n "${ns_name}" route add "${addr}" table "${rt_table}" via "${gw}" 749 750 ns=""; addr=""; gw="" 751 done 752} 753 754setup_routing_new() { 755 for i in ${nexthops}; do 756 [ "${ns}" = "" ] && ns="${i}" && continue 757 [ "${fam}" = "" ] && fam="${i}" && continue 758 [ "${nhid}" = "" ] && nhid="${i}" && continue 759 [ "${gw}" = "" ] && gw="${i}" && continue 760 [ "${dev}" = "" ] && dev="${i}" 761 762 ns_name="$(nsname ${ns})" 763 764 ip -n ${ns_name} -${fam} nexthop add id ${nhid} via ${gw} dev ${dev} 765 766 ns=""; fam=""; nhid=""; gw=""; dev="" 767 768 done 769 770 for i in ${routes_nh}; do 771 [ "${ns}" = "" ] && ns="${i}" && continue 772 [ "${fam}" = "" ] && fam="${i}" && continue 773 [ "${addr}" = "" ] && addr="${i}" && continue 774 [ "${nhid}" = "" ] && nhid="${i}" 775 776 ns_name="$(nsname ${ns})" 777 778 ip -n "${ns_name}" -"${fam}" route add "${addr}" table "${rt_table}" nhid "${nhid}" 779 780 ns=""; fam=""; addr=""; nhid="" 781 done 782} 783 784setup_routing() { 785 for i in ${NS_R1} ${NS_R2}; do 786 ip netns exec ${i} sysctl -q net/ipv4/ip_forward=1 787 ip netns exec ${i} sysctl -q net/ipv6/conf/all/forwarding=1 788 done 789 790 for i in ${routing_addrs}; do 791 [ "${ns}" = "" ] && ns="${i}" && continue 792 [ "${peer}" = "" ] && peer="${i}" && continue 793 [ "${segment}" = "" ] && segment="${i}" 794 795 ns_name="$(nsname ${ns})" 796 peer_name="$(nsname ${peer})" 797 if="veth_${ns}-${peer}" 798 ifpeer="veth_${peer}-${ns}" 799 800 # Create veth links 801 ip link add ${if} up netns ${ns_name} type veth peer name ${ifpeer} netns ${peer_name} || return 1 802 ip -n ${peer_name} link set dev ${ifpeer} up 803 804 # Add addresses 805 ip -n ${ns_name} addr add ${prefix4}.${segment}.1/24 dev ${if} 806 ip -n ${ns_name} addr add ${prefix6}:${segment}::1/64 dev ${if} 807 808 ip -n ${peer_name} addr add ${prefix4}.${segment}.2/24 dev ${ifpeer} 809 ip -n ${peer_name} addr add ${prefix6}:${segment}::2/64 dev ${ifpeer} 810 811 ns=""; peer=""; segment="" 812 done 813 814 if [ "$USE_NH" = "yes" ]; then 815 setup_routing_new 816 else 817 setup_routing_old 818 fi 819 820 return 0 821} 822 823setup_policy_routing() { 824 setup_routing 825 826 ip -netns "${NS_A}" -4 rule add dsfield "${policy_mark}" \ 827 table "${rt_table}" 828 829 # Set the IPv4 Don't Fragment bit with tc, since socat doesn't seem to 830 # have an option do to it. 831 tc -netns "${NS_A}" qdisc replace dev veth_A-R1 root prio 832 tc -netns "${NS_A}" qdisc replace dev veth_A-R2 root prio 833 tc -netns "${NS_A}" filter add dev veth_A-R1 \ 834 protocol ipv4 flower ip_proto udp \ 835 action pedit ex munge ip df set 0x40 pipe csum ip and udp 836 tc -netns "${NS_A}" filter add dev veth_A-R2 \ 837 protocol ipv4 flower ip_proto udp \ 838 action pedit ex munge ip df set 0x40 pipe csum ip and udp 839} 840 841setup_bridge() { 842 run_cmd ${ns_a} ip link add br0 type bridge || return $ksft_skip 843 run_cmd ${ns_a} ip link set br0 up 844 845 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 846 run_cmd ${ns_c} ip link set veth_A-C netns ${NS_A} 847 848 run_cmd ${ns_a} ip link set veth_A-C up 849 run_cmd ${ns_c} ip link set veth_C-A up 850 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 851 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 852 run_cmd ${ns_a} ip link set veth_A-C master br0 853} 854 855setup_ovs_vxlan_or_geneve() { 856 type="${1}" 857 a_addr="${2}" 858 b_addr="${3}" 859 860 if [ "${type}" = "vxlan" ]; then 861 opts="${opts} ttl 64 dstport 4789" 862 opts_b="local ${b_addr}" 863 fi 864 865 run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \ 866 set interface ${type}_a type=${type} \ 867 options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1 868 869 run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1 870 871 run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b 872 run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b 873 874 run_cmd ${ns_b} ip link set ${type}_b up 875} 876 877setup_ovs_geneve4() { 878 setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 879} 880 881setup_ovs_vxlan4() { 882 setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 883} 884 885setup_ovs_geneve6() { 886 setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 887} 888 889setup_ovs_vxlan6() { 890 setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 891} 892 893setup_ovs_bridge() { 894 run_cmd ovs-vsctl add-br ovs_br0 || return $ksft_skip 895 run_cmd ip link set ovs_br0 up 896 897 run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C 898 run_cmd ${ns_c} ip link set veth_A-C netns 1 899 900 run_cmd ip link set veth_A-C up 901 run_cmd ${ns_c} ip link set veth_C-A up 902 run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A 903 run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A 904 run_cmd ovs-vsctl add-port ovs_br0 veth_A-C 905 906 # Move veth_A-R1 to init 907 run_cmd ${ns_a} ip link set veth_A-R1 netns 1 908 run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1 909 run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1 910 run_cmd ip link set veth_A-R1 up 911 run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2 912 run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 913} 914 915setup_multipath_new() { 916 # Set up host A with multipath routes to host B host4_b_addr 917 run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo 918 run_cmd ${ns_a} ip nexthop add id 401 via ${prefix4}.${a_r1}.2 dev veth_A-R1 919 run_cmd ${ns_a} ip nexthop add id 402 via ${prefix4}.${a_r2}.2 dev veth_A-R2 920 run_cmd ${ns_a} ip nexthop add id 403 group 401/402 921 run_cmd ${ns_a} ip route add ${host4_b_addr} src ${host4_a_addr} nhid 403 922 923 # Set up host B with multipath routes to host A host4_a_addr 924 run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo 925 run_cmd ${ns_b} ip nexthop add id 401 via ${prefix4}.${b_r1}.2 dev veth_B-R1 926 run_cmd ${ns_b} ip nexthop add id 402 via ${prefix4}.${b_r2}.2 dev veth_B-R2 927 run_cmd ${ns_b} ip nexthop add id 403 group 401/402 928 run_cmd ${ns_b} ip route add ${host4_a_addr} src ${host4_b_addr} nhid 403 929} 930 931setup_multipath_old() { 932 # Set up host A with multipath routes to host B host4_b_addr 933 run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo 934 run_cmd ${ns_a} ip route add ${host4_b_addr} \ 935 src ${host4_a_addr} \ 936 nexthop via ${prefix4}.${a_r1}.2 weight 1 \ 937 nexthop via ${prefix4}.${a_r2}.2 weight 1 938 939 # Set up host B with multipath routes to host A host4_a_addr 940 run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo 941 run_cmd ${ns_b} ip route add ${host4_a_addr} \ 942 src ${host4_b_addr} \ 943 nexthop via ${prefix4}.${b_r1}.2 weight 1 \ 944 nexthop via ${prefix4}.${b_r2}.2 weight 1 945} 946 947setup_multipath() { 948 if [ "$USE_NH" = "yes" ]; then 949 setup_multipath_new 950 else 951 setup_multipath_old 952 fi 953 954 # Set up routers with routes to dummies 955 run_cmd ${ns_r1} ip route add ${host4_a_addr} via ${prefix4}.${a_r1}.1 956 run_cmd ${ns_r2} ip route add ${host4_a_addr} via ${prefix4}.${a_r2}.1 957 run_cmd ${ns_r1} ip route add ${host4_b_addr} via ${prefix4}.${b_r1}.1 958 run_cmd ${ns_r2} ip route add ${host4_b_addr} via ${prefix4}.${b_r2}.1 959} 960 961setup() { 962 [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip 963 964 for arg do 965 eval setup_${arg} || { echo " ${arg} not supported"; return 1; } 966 done 967} 968 969trace() { 970 [ $TRACING -eq 0 ] && return 971 972 for arg do 973 [ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue 974 ${ns_cmd} tcpdump --immediate-mode -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null & 975 tcpdump_pids="${tcpdump_pids} $!" 976 ns_cmd= 977 done 978 sleep 1 979} 980 981cleanup() { 982 for pid in ${tcpdump_pids}; do 983 kill ${pid} 984 done 985 tcpdump_pids= 986 987 for pid in ${nettest_pids}; do 988 kill ${pid} 989 done 990 nettest_pids= 991 992 for pid in ${socat_pids}; do 993 kill "${pid}" 994 done 995 socat_pids= 996 997 cleanup_all_ns 998 999 ip link del veth_A-C 2>/dev/null 1000 ip link del veth_A-R1 2>/dev/null 1001 ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null 1002 ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null 1003 rm -f "$tmpoutfile" 1004} 1005 1006mtu() { 1007 ns_cmd="${1}" 1008 dev="${2}" 1009 mtu="${3}" 1010 1011 ${ns_cmd} ip link set dev ${dev} mtu ${mtu} 1012} 1013 1014mtu_parse() { 1015 input="${1}" 1016 1017 next=0 1018 for i in ${input}; do 1019 [ ${next} -eq 1 -a "${i}" = "lock" ] && next=2 && continue 1020 [ ${next} -eq 1 ] && echo "${i}" && return 1021 [ ${next} -eq 2 ] && echo "lock ${i}" && return 1022 [ "${i}" = "mtu" ] && next=1 1023 done 1024} 1025 1026link_get() { 1027 ns_cmd="${1}" 1028 name="${2}" 1029 1030 ${ns_cmd} ip link show dev "${name}" 1031} 1032 1033link_get_mtu() { 1034 ns_cmd="${1}" 1035 name="${2}" 1036 1037 mtu_parse "$(link_get "${ns_cmd}" ${name})" 1038} 1039 1040route_get_dst_exception() { 1041 ns_cmd="${1}"; shift 1042 1043 ${ns_cmd} ip route get "$@" 1044} 1045 1046route_get_dst_pmtu_from_exception() { 1047 ns_cmd="${1}"; shift 1048 1049 mtu_parse "$(route_get_dst_exception "${ns_cmd}" "$@")" 1050} 1051 1052check_pmtu_value() { 1053 expected="${1}" 1054 value="${2}" 1055 event="${3}" 1056 1057 [ "${expected}" = "any" ] && [ -n "${value}" ] && return 0 1058 [ "${value}" = "${expected}" ] && return 0 1059 [ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1 1060 [ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1 1061 err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}" 1062 return 1 1063} 1064 1065test_pmtu_ipvX() { 1066 family=${1} 1067 1068 setup namespaces routing || return $ksft_skip 1069 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1070 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1071 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1072 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1073 1074 if [ ${family} -eq 4 ]; then 1075 ping=ping 1076 dst1="${prefix4}.${b_r1}.1" 1077 dst2="${prefix4}.${b_r2}.1" 1078 else 1079 ping=${ping6} 1080 dst1="${prefix6}:${b_r1}::1" 1081 dst2="${prefix6}:${b_r2}::1" 1082 fi 1083 1084 # Set up initial MTU values 1085 mtu "${ns_a}" veth_A-R1 2000 1086 mtu "${ns_r1}" veth_R1-A 2000 1087 mtu "${ns_r1}" veth_R1-B 1400 1088 mtu "${ns_b}" veth_B-R1 1400 1089 1090 mtu "${ns_a}" veth_A-R2 2000 1091 mtu "${ns_r2}" veth_R2-A 2000 1092 mtu "${ns_r2}" veth_R2-B 1500 1093 mtu "${ns_b}" veth_B-R2 1500 1094 1095 # Create route exceptions 1096 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 1097 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 1098 1099 # Check that exceptions have been created with the correct PMTU 1100 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1101 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1102 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1103 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1104 1105 # Decrease local MTU below PMTU, check for PMTU decrease in route exception 1106 mtu "${ns_a}" veth_A-R1 1300 1107 mtu "${ns_r1}" veth_R1-A 1300 1108 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1109 check_pmtu_value "1300" "${pmtu_1}" "decreasing local MTU" || return 1 1110 # Second exception shouldn't be modified 1111 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1112 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1113 1114 # Increase MTU, check for PMTU increase in route exception 1115 mtu "${ns_a}" veth_A-R1 1700 1116 mtu "${ns_r1}" veth_R1-A 1700 1117 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 1118 check_pmtu_value "1700" "${pmtu_1}" "increasing local MTU" || return 1 1119 # Second exception shouldn't be modified 1120 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1121 check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1 1122 1123 # Skip PMTU locking tests for IPv6 1124 [ $family -eq 6 ] && return 0 1125 1126 # Decrease remote MTU on path via R2, get new exception 1127 mtu "${ns_r2}" veth_R2-B 400 1128 mtu "${ns_b}" veth_B-R2 400 1129 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1130 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1131 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1132 1133 # Decrease local MTU below PMTU 1134 mtu "${ns_a}" veth_A-R2 500 1135 mtu "${ns_r2}" veth_R2-A 500 1136 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1137 check_pmtu_value "500" "${pmtu_2}" "decreasing local MTU" || return 1 1138 1139 # Increase local MTU 1140 mtu "${ns_a}" veth_A-R2 1500 1141 mtu "${ns_r2}" veth_R2-A 1500 1142 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1143 check_pmtu_value "1500" "${pmtu_2}" "increasing local MTU" || return 1 1144 1145 # Get new exception 1146 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2} 1147 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 1148 check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1 1149} 1150 1151test_pmtu_ipv4_exception() { 1152 test_pmtu_ipvX 4 1153} 1154 1155test_pmtu_ipv6_exception() { 1156 test_pmtu_ipvX 6 1157} 1158 1159test_pmtu_ipv4_dscp_icmp_exception() { 1160 rt_table=100 1161 1162 setup namespaces policy_routing || return $ksft_skip 1163 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1164 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1165 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1166 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1167 1168 # Set up initial MTU values 1169 mtu "${ns_a}" veth_A-R1 2000 1170 mtu "${ns_r1}" veth_R1-A 2000 1171 mtu "${ns_r1}" veth_R1-B 1400 1172 mtu "${ns_b}" veth_B-R1 1400 1173 1174 mtu "${ns_a}" veth_A-R2 2000 1175 mtu "${ns_r2}" veth_R2-A 2000 1176 mtu "${ns_r2}" veth_R2-B 1500 1177 mtu "${ns_b}" veth_B-R2 1500 1178 1179 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1180 1181 dst1="${prefix4}.${b_r1}.1" 1182 dst2="${prefix4}.${b_r2}.1" 1183 1184 # Create route exceptions 1185 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1186 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst1}" 1187 1188 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1189 run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}" 1190 1191 # Check that exceptions have been created with the correct PMTU 1192 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" 1193 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1194 1195 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" 1196 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1197} 1198 1199test_pmtu_ipv4_dscp_udp_exception() { 1200 rt_table=100 1201 1202 if ! which socat > /dev/null 2>&1; then 1203 echo "'socat' command not found; skipping tests" 1204 return $ksft_skip 1205 fi 1206 1207 setup namespaces policy_routing || return $ksft_skip 1208 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1209 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 1210 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 1211 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 1212 1213 # Set up initial MTU values 1214 mtu "${ns_a}" veth_A-R1 2000 1215 mtu "${ns_r1}" veth_R1-A 2000 1216 mtu "${ns_r1}" veth_R1-B 1400 1217 mtu "${ns_b}" veth_B-R1 1400 1218 1219 mtu "${ns_a}" veth_A-R2 2000 1220 mtu "${ns_r2}" veth_R2-A 2000 1221 mtu "${ns_r2}" veth_R2-B 1500 1222 mtu "${ns_b}" veth_B-R2 1500 1223 1224 len=$((2000 - 20 - 8)) # Fills MTU of veth_A-R1 1225 1226 dst1="${prefix4}.${b_r1}.1" 1227 dst2="${prefix4}.${b_r2}.1" 1228 1229 # Create route exceptions 1230 run_cmd_bg "${ns_b}" socat UDP-LISTEN:50000 OPEN:/dev/null,wronly=1 1231 socat_pids="${socat_pids} $!" 1232 1233 dsfield=${policy_mark} # No ECN bit set (Not-ECT) 1234 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1235 UDP:"${dst1}":50000,tos="${dsfield}" 1236 1237 dsfield=$(printf "%#x" $((policy_mark + 0x02))) # ECN=2 (ECT(0)) 1238 run_cmd "${ns_a}" socat OPEN:/dev/zero,rdonly=1,readbytes="${len}" \ 1239 UDP:"${dst2}":50000,tos="${dsfield}" 1240 1241 # Check that exceptions have been created with the correct PMTU 1242 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" 1243 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 1244 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" 1245 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 1246} 1247 1248test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() { 1249 type=${1} 1250 family=${2} 1251 outer_family=${3} 1252 ll_mtu=4000 1253 1254 if [ ${outer_family} -eq 4 ]; then 1255 setup namespaces routing ${type}4 || return $ksft_skip 1256 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1257 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1258 else 1259 setup namespaces routing ${type}6 || return $ksft_skip 1260 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1261 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1262 fi 1263 1264 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1265 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1266 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1267 1268 if [ ${family} -eq 4 ]; then 1269 ping=ping 1270 dst=${tunnel4_b_addr} 1271 else 1272 ping=${ping6} 1273 dst=${tunnel6_b_addr} 1274 fi 1275 1276 # Create route exception by exceeding link layer MTU 1277 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1278 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1279 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1280 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1281 1282 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1283 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1284 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1285 1286 # Check that exception was created 1287 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1288 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface" 1289} 1290 1291test_pmtu_ipv4_vxlan4_exception() { 1292 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4 1293} 1294 1295test_pmtu_ipv6_vxlan4_exception() { 1296 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4 1297} 1298 1299test_pmtu_ipv4_geneve4_exception() { 1300 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4 1301} 1302 1303test_pmtu_ipv6_geneve4_exception() { 1304 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4 1305} 1306 1307test_pmtu_ipv4_vxlan6_exception() { 1308 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6 1309} 1310 1311test_pmtu_ipv6_vxlan6_exception() { 1312 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6 1313} 1314 1315test_pmtu_ipv4_geneve6_exception() { 1316 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6 1317} 1318 1319test_pmtu_ipv6_geneve6_exception() { 1320 test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6 1321} 1322 1323test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() { 1324 type=${1} 1325 family=${2} 1326 outer_family=${3} 1327 ll_mtu=4000 1328 1329 if [ ${outer_family} -eq 4 ]; then 1330 setup namespaces routing bridge bridged_${type}4 || return $ksft_skip 1331 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1332 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1333 else 1334 setup namespaces routing bridge bridged_${type}6 || return $ksft_skip 1335 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1336 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1337 fi 1338 1339 trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \ 1340 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1341 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1342 "${ns_a}" br0 "${ns_a}" veth-A-C \ 1343 "${ns_c}" veth_C-A 1344 1345 if [ ${family} -eq 4 ]; then 1346 ping=ping 1347 dst=${tunnel4_b_addr} 1348 else 1349 ping=${ping6} 1350 dst=${tunnel6_b_addr} 1351 fi 1352 1353 # Create route exception by exceeding link layer MTU 1354 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1355 mtu "${ns_a}" br0 $((${ll_mtu} + 1000)) 1356 mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000)) 1357 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1358 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1359 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1360 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1361 1362 mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000)) 1363 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1364 1365 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1 1366 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1 1367 1368 # Check that exceptions were created 1369 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1370 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface" 1371 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1372 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface" 1373 1374 tmpoutfile=$(mktemp) 1375 1376 # Flush Exceptions, retry with TCP 1377 run_cmd ${ns_a} ip route flush cached ${dst} 1378 run_cmd ${ns_b} ip route flush cached ${dst} 1379 run_cmd ${ns_c} ip route flush cached ${dst} 1380 1381 for target in "${ns_a}" "${ns_c}" ; do 1382 if [ ${family} -eq 4 ]; then 1383 TCPDST=TCP:${dst}:50000 1384 else 1385 TCPDST="TCP:[${dst}]:50000" 1386 fi 1387 ${ns_b} socat -T 3 -u -6 TCP-LISTEN:50000 STDOUT > $tmpoutfile & 1388 local socat_pid=$! 1389 1390 wait_local_port_listen ${NS_B} 50000 tcp 1391 1392 dd if=/dev/zero status=none bs=1M count=1 | ${target} socat -T 3 -u STDIN $TCPDST,connect-timeout=3 1393 1394 size=$(du -sb $tmpoutfile) 1395 size=${size%%/tmp/*} 1396 wait ${socat_pid} 1397 1398 [ $size -ne 1048576 ] && err "File size $size mismatches exepcted value in locally bridged vxlan test" && return 1 1399 done 1400 1401 rm -f "$tmpoutfile" 1402 1403 # Check that exceptions were created 1404 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1405 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp: exceeding link layer MTU on bridged ${type} interface" 1406 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1407 check_pmtu_value ${exp_mtu} "${pmtu}" "tcp exceeding link layer MTU on locally bridged ${type} interface" 1408} 1409 1410test_pmtu_ipv4_br_vxlan4_exception() { 1411 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4 1412} 1413 1414test_pmtu_ipv6_br_vxlan4_exception() { 1415 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4 1416} 1417 1418test_pmtu_ipv4_br_geneve4_exception() { 1419 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4 1420} 1421 1422test_pmtu_ipv6_br_geneve4_exception() { 1423 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4 1424} 1425 1426test_pmtu_ipv4_br_vxlan6_exception() { 1427 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6 1428} 1429 1430test_pmtu_ipv6_br_vxlan6_exception() { 1431 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6 1432} 1433 1434test_pmtu_ipv4_br_geneve6_exception() { 1435 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6 1436} 1437 1438test_pmtu_ipv6_br_geneve6_exception() { 1439 test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6 1440} 1441 1442test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() { 1443 type=${1} 1444 family=${2} 1445 outer_family=${3} 1446 ll_mtu=4000 1447 1448 if [ ${outer_family} -eq 4 ]; then 1449 setup namespaces routing ovs_bridge ovs_${type}4 || return $ksft_skip 1450 # IPv4 header UDP header VXLAN/GENEVE header Ethernet header 1451 exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14)) 1452 else 1453 setup namespaces routing ovs_bridge ovs_${type}6 || return $ksft_skip 1454 # IPv6 header UDP header VXLAN/GENEVE header Ethernet header 1455 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14)) 1456 fi 1457 1458 if [ "${type}" = "vxlan" ]; then 1459 tun_a="vxlan_sys_4789" 1460 elif [ "${type}" = "geneve" ]; then 1461 tun_a="genev_sys_6081" 1462 fi 1463 1464 trace "" "${tun_a}" "${ns_b}" ${type}_b \ 1465 "" veth_A-R1 "${ns_r1}" veth_R1-A \ 1466 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \ 1467 "" ovs_br0 "" veth-A-C \ 1468 "${ns_c}" veth_C-A 1469 1470 if [ ${family} -eq 4 ]; then 1471 ping=ping 1472 dst=${tunnel4_b_addr} 1473 else 1474 ping=${ping6} 1475 dst=${tunnel6_b_addr} 1476 fi 1477 1478 # Create route exception by exceeding link layer MTU 1479 mtu "" veth_A-R1 $((${ll_mtu} + 1000)) 1480 mtu "" ovs_br0 $((${ll_mtu} + 1000)) 1481 mtu "" veth_A-C $((${ll_mtu} + 1000)) 1482 mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000)) 1483 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1484 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1485 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1486 1487 mtu "" ${tun_a} $((${ll_mtu} + 1000)) 1488 mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000)) 1489 1490 run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1 1491 1492 # Check that exceptions were created 1493 pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})" 1494 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface" 1495} 1496 1497test_pmtu_ipv4_ovs_vxlan4_exception() { 1498 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4 1499} 1500 1501test_pmtu_ipv6_ovs_vxlan4_exception() { 1502 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4 1503} 1504 1505test_pmtu_ipv4_ovs_geneve4_exception() { 1506 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4 1507} 1508 1509test_pmtu_ipv6_ovs_geneve4_exception() { 1510 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4 1511} 1512 1513test_pmtu_ipv4_ovs_vxlan6_exception() { 1514 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6 1515} 1516 1517test_pmtu_ipv6_ovs_vxlan6_exception() { 1518 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6 1519} 1520 1521test_pmtu_ipv4_ovs_geneve6_exception() { 1522 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6 1523} 1524 1525test_pmtu_ipv6_ovs_geneve6_exception() { 1526 test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6 1527} 1528 1529test_pmtu_ipvX_over_fouY_or_gueY() { 1530 inner_family=${1} 1531 outer_family=${2} 1532 encap=${3} 1533 ll_mtu=4000 1534 1535 setup namespaces routing ${encap}${outer_family}${inner_family} || return $ksft_skip 1536 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 1537 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1538 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1539 1540 if [ ${inner_family} -eq 4 ]; then 1541 ping=ping 1542 dst=${tunnel4_b_addr} 1543 else 1544 ping=${ping6} 1545 dst=${tunnel6_b_addr} 1546 fi 1547 1548 if [ "${encap}" = "gue" ]; then 1549 encap_overhead=4 1550 else 1551 encap_overhead=0 1552 fi 1553 1554 if [ ${outer_family} -eq 4 ]; then 1555 # IPv4 header UDP header 1556 exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead})) 1557 else 1558 # IPv6 header Option 4 UDP header 1559 exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead})) 1560 fi 1561 1562 # Create route exception by exceeding link layer MTU 1563 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1564 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1565 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1566 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1567 1568 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 1569 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 1570 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1571 1572 # Check that exception was created 1573 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1574 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${encap} interface" 1575} 1576 1577test_pmtu_ipv4_fou4_exception() { 1578 test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou 1579} 1580 1581test_pmtu_ipv6_fou4_exception() { 1582 test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou 1583} 1584 1585test_pmtu_ipv4_fou6_exception() { 1586 test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou 1587} 1588 1589test_pmtu_ipv6_fou6_exception() { 1590 test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou 1591} 1592 1593test_pmtu_ipv4_gue4_exception() { 1594 test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue 1595} 1596 1597test_pmtu_ipv6_gue4_exception() { 1598 test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue 1599} 1600 1601test_pmtu_ipv4_gue6_exception() { 1602 test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue 1603} 1604 1605test_pmtu_ipv6_gue6_exception() { 1606 test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue 1607} 1608 1609test_pmtu_ipvX_over_ipvY_exception() { 1610 inner=${1} 1611 outer=${2} 1612 ll_mtu=4000 1613 1614 setup namespaces routing ip${inner}ip${outer} || return $ksft_skip 1615 1616 trace "${ns_a}" ip_a "${ns_b}" ip_b \ 1617 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 1618 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 1619 1620 if [ ${inner} -eq 4 ]; then 1621 ping=ping 1622 dst=${tunnel4_b_addr} 1623 else 1624 ping=${ping6} 1625 dst=${tunnel6_b_addr} 1626 fi 1627 1628 if [ ${outer} -eq 4 ]; then 1629 # IPv4 header 1630 exp_mtu=$((${ll_mtu} - 20)) 1631 else 1632 # IPv6 header Option 4 1633 exp_mtu=$((${ll_mtu} - 40 - 8)) 1634 fi 1635 1636 # Create route exception by exceeding link layer MTU 1637 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 1638 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 1639 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 1640 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 1641 1642 mtu "${ns_a}" ip_a $((${ll_mtu} + 1000)) || return 1643 mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return 1644 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} 1645 1646 # Check that exception was created 1647 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})" 1648 check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface" 1649} 1650 1651test_pmtu_ipv4_ipv4_exception() { 1652 test_pmtu_ipvX_over_ipvY_exception 4 4 1653} 1654 1655test_pmtu_ipv6_ipv4_exception() { 1656 test_pmtu_ipvX_over_ipvY_exception 6 4 1657} 1658 1659test_pmtu_ipv4_ipv6_exception() { 1660 test_pmtu_ipvX_over_ipvY_exception 4 6 1661} 1662 1663test_pmtu_ipv6_ipv6_exception() { 1664 test_pmtu_ipvX_over_ipvY_exception 6 6 1665} 1666 1667test_pmtu_vti4_exception() { 1668 setup namespaces veth vti4 xfrm4 || return $ksft_skip 1669 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1670 "${ns_a}" vti4_a "${ns_b}" vti4_b 1671 1672 veth_mtu=1500 1673 vti_mtu=$((veth_mtu - 20)) 1674 1675 # SPI SN IV ICV pad length next header 1676 esp_payload_rfc4106=$((vti_mtu - 4 - 4 - 8 - 16 - 1 - 1)) 1677 ping_payload=$((esp_payload_rfc4106 - 28)) 1678 1679 mtu "${ns_a}" veth_a ${veth_mtu} 1680 mtu "${ns_b}" veth_b ${veth_mtu} 1681 mtu "${ns_a}" vti4_a ${vti_mtu} 1682 mtu "${ns_b}" vti4_b ${vti_mtu} 1683 1684 # Send DF packet without exceeding link layer MTU, check that no 1685 # exception is created 1686 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1687 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1688 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1689 1690 # Now exceed link layer MTU by one byte, check that exception is created 1691 # with the right PMTU value 1692 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1693 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1694 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1695} 1696 1697test_pmtu_vti6_exception() { 1698 setup namespaces veth vti6 xfrm6 || return $ksft_skip 1699 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1700 "${ns_a}" vti6_a "${ns_b}" vti6_b 1701 fail=0 1702 1703 # Create route exception by exceeding link layer MTU 1704 mtu "${ns_a}" veth_a 4000 1705 mtu "${ns_b}" veth_b 4000 1706 mtu "${ns_a}" vti6_a 5000 1707 mtu "${ns_b}" vti6_b 5000 1708 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1709 1710 # Check that exception was created 1711 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1712 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1713 1714 # Decrease tunnel MTU, check for PMTU decrease in route exception 1715 mtu "${ns_a}" vti6_a 3000 1716 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1717 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1718 1719 # Increase tunnel MTU, check for PMTU increase in route exception 1720 mtu "${ns_a}" vti6_a 9000 1721 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1722 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1723 1724 return ${fail} 1725} 1726 1727test_pmtu_vti4_udp_exception() { 1728 setup namespaces veth vti4 xfrm4udp || return $ksft_skip 1729 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1730 "${ns_a}" vti4_a "${ns_b}" vti4_b 1731 1732 veth_mtu=1500 1733 vti_mtu=$((veth_mtu - 20)) 1734 1735 # UDP SPI SN IV ICV pad length next header 1736 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1737 ping_payload=$((esp_payload_rfc4106 - 28)) 1738 1739 mtu "${ns_a}" veth_a ${veth_mtu} 1740 mtu "${ns_b}" veth_b ${veth_mtu} 1741 mtu "${ns_a}" vti4_a ${vti_mtu} 1742 mtu "${ns_b}" vti4_b ${vti_mtu} 1743 1744 # Send DF packet without exceeding link layer MTU, check that no 1745 # exception is created 1746 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1747 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1748 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1749 1750 # Now exceed link layer MTU by one byte, check that exception is created 1751 # with the right PMTU value 1752 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr} 1753 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1754 check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))" 1755} 1756 1757test_pmtu_vti6_udp_exception() { 1758 setup namespaces veth vti6 xfrm6udp || return $ksft_skip 1759 trace "${ns_a}" veth_a "${ns_b}" veth_b \ 1760 "${ns_a}" vti6_a "${ns_b}" vti6_b 1761 fail=0 1762 1763 # Create route exception by exceeding link layer MTU 1764 mtu "${ns_a}" veth_a 4000 1765 mtu "${ns_b}" veth_b 4000 1766 mtu "${ns_a}" vti6_a 5000 1767 mtu "${ns_b}" vti6_b 5000 1768 run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr} 1769 1770 # Check that exception was created 1771 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1772 check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1 1773 1774 # Decrease tunnel MTU, check for PMTU decrease in route exception 1775 mtu "${ns_a}" vti6_a 3000 1776 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1777 check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1 1778 1779 # Increase tunnel MTU, check for PMTU increase in route exception 1780 mtu "${ns_a}" vti6_a 9000 1781 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1782 check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1 1783 1784 return ${fail} 1785} 1786 1787test_pmtu_vti4_udp_routed_exception() { 1788 setup namespaces routing vti4routed xfrm4udprouted || return $ksft_skip 1789 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1790 "${ns_a}" vti4_a "${ns_b}" vti4_b 1791 1792 veth_mtu=1500 1793 vti_mtu=$((veth_mtu - 20)) 1794 1795 # UDP SPI SN IV ICV pad length next header 1796 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1797 ping_payload=$((esp_payload_rfc4106 - 28)) 1798 1799 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1800 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1801 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1802 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1803 1804 mtu "${ns_a}" vti4_a ${vti_mtu} 1805 mtu "${ns_b}" vti4_b ${vti_mtu} 1806 1807 # Send DF packet without exceeding link layer MTU, check that no 1808 # exception is created 1809 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr} 1810 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1811 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1812 1813 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1814 # with the right PMTU value 1815 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1816 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel4_b_addr} 1817 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})" 1818 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1819} 1820 1821test_pmtu_vti6_udp_routed_exception() { 1822 setup namespaces routing vti6routed xfrm6udprouted || return $ksft_skip 1823 trace "${ns_a}" veth_A-R1 "${ns_b}" veth_B-R1 \ 1824 "${ns_a}" vti6_a "${ns_b}" vti6_b 1825 1826 veth_mtu=1500 1827 vti_mtu=$((veth_mtu - 40)) 1828 1829 # UDP SPI SN IV ICV pad length next header 1830 esp_payload_rfc4106=$((vti_mtu - 8 - 4 - 4 - 8 - 16 - 1 - 1)) 1831 ping_payload=$((esp_payload_rfc4106 - 48)) 1832 1833 mtu "${ns_a}" veth_A-R1 ${veth_mtu} 1834 mtu "${ns_r1}" veth_R1-A ${veth_mtu} 1835 mtu "${ns_b}" veth_B-R1 ${veth_mtu} 1836 mtu "${ns_r1}" veth_R1-B ${veth_mtu} 1837 1838 # mtu "${ns_a}" vti6_a ${vti_mtu} 1839 # mtu "${ns_b}" vti6_b ${vti_mtu} 1840 1841 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel6_b_addr} 1842 1843 # Check that exception was not created 1844 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1845 check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1 1846 1847 # Now decrease link layer MTU by 8 bytes on R1, check that exception is created 1848 # with the right PMTU value 1849 mtu "${ns_r1}" veth_R1-B $((veth_mtu - 8)) 1850 run_cmd ${ns_a} ${ping6} -q -M want -i 0.1 -w 1 -s $((ping_payload)) ${tunnel6_b_addr} 1851 pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})" 1852 check_pmtu_value "$((esp_payload_rfc4106 - 8))" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106)))" 1853 1854} 1855 1856test_pmtu_vti4_default_mtu() { 1857 setup namespaces veth vti4 || return $ksft_skip 1858 1859 # Check that MTU of vti device is MTU of veth minus IPv4 header length 1860 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1861 vti4_mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1862 if [ $((veth_mtu - vti4_mtu)) -ne 20 ]; then 1863 err " vti MTU ${vti4_mtu} is not veth MTU ${veth_mtu} minus IPv4 header length" 1864 return 1 1865 fi 1866} 1867 1868test_pmtu_vti6_default_mtu() { 1869 setup namespaces veth vti6 || return $ksft_skip 1870 1871 # Check that MTU of vti device is MTU of veth minus IPv6 header length 1872 veth_mtu="$(link_get_mtu "${ns_a}" veth_a)" 1873 vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1874 if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then 1875 err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length" 1876 return 1 1877 fi 1878} 1879 1880test_pmtu_vti4_link_add_mtu() { 1881 setup namespaces || return $ksft_skip 1882 1883 run_cmd ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1884 [ $? -ne 0 ] && err " vti not supported" && return $ksft_skip 1885 run_cmd ${ns_a} ip link del vti4_a 1886 1887 fail=0 1888 1889 min=68 1890 max=$((65535 - 20)) 1891 # Check invalid values first 1892 for v in $((min - 1)) $((max + 1)); do 1893 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1894 # This can fail, or MTU can be adjusted to a proper value 1895 [ $? -ne 0 ] && continue 1896 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1897 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1898 err " vti tunnel created with invalid MTU ${mtu}" 1899 fail=1 1900 fi 1901 run_cmd ${ns_a} ip link del vti4_a 1902 done 1903 1904 # Now check valid values 1905 for v in ${min} 1300 ${max}; do 1906 run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 1907 mtu="$(link_get_mtu "${ns_a}" vti4_a)" 1908 run_cmd ${ns_a} ip link del vti4_a 1909 if [ "${mtu}" != "${v}" ]; then 1910 err " vti MTU ${mtu} doesn't match configured value ${v}" 1911 fail=1 1912 fi 1913 done 1914 1915 return ${fail} 1916} 1917 1918test_pmtu_vti6_link_add_mtu() { 1919 setup namespaces || return $ksft_skip 1920 1921 run_cmd ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1922 [ $? -ne 0 ] && err " vti6 not supported" && return $ksft_skip 1923 run_cmd ${ns_a} ip link del vti6_a 1924 1925 fail=0 1926 1927 min=68 # vti6 can carry IPv4 packets too 1928 max=$((65535 - 40)) 1929 # Check invalid values first 1930 for v in $((min - 1)) $((max + 1)); do 1931 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1932 # This can fail, or MTU can be adjusted to a proper value 1933 [ $? -ne 0 ] && continue 1934 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1935 if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then 1936 err " vti6 tunnel created with invalid MTU ${v}" 1937 fail=1 1938 fi 1939 run_cmd ${ns_a} ip link del vti6_a 1940 done 1941 1942 # Now check valid values 1943 for v in 68 1280 1300 $((65535 - 40)); do 1944 run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 1945 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1946 run_cmd ${ns_a} ip link del vti6_a 1947 if [ "${mtu}" != "${v}" ]; then 1948 err " vti6 MTU ${mtu} doesn't match configured value ${v}" 1949 fail=1 1950 fi 1951 done 1952 1953 return ${fail} 1954} 1955 1956test_pmtu_vti6_link_change_mtu() { 1957 setup namespaces || return $ksft_skip 1958 1959 run_cmd ${ns_a} ip link add dummy0 mtu 1500 type dummy 1960 [ $? -ne 0 ] && err " dummy not supported" && return $ksft_skip 1961 run_cmd ${ns_a} ip link add dummy1 mtu 3000 type dummy 1962 run_cmd ${ns_a} ip link set dummy0 up 1963 run_cmd ${ns_a} ip link set dummy1 up 1964 1965 run_cmd ${ns_a} ip addr add ${dummy6_0_prefix}1/${dummy6_mask} dev dummy0 1966 run_cmd ${ns_a} ip addr add ${dummy6_1_prefix}1/${dummy6_mask} dev dummy1 1967 1968 fail=0 1969 1970 # Create vti6 interface bound to device, passing MTU, check it 1971 run_cmd ${ns_a} ip link add vti6_a mtu 1300 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1972 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1973 if [ ${mtu} -ne 1300 ]; then 1974 err " vti6 MTU ${mtu} doesn't match configured value 1300" 1975 fail=1 1976 fi 1977 1978 # Move to another device with different MTU, without passing MTU, check 1979 # MTU is adjusted 1980 run_cmd ${ns_a} ip link set vti6_a type vti6 remote ${dummy6_1_prefix}2 local ${dummy6_1_prefix}1 1981 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1982 if [ ${mtu} -ne $((3000 - 40)) ]; then 1983 err " vti MTU ${mtu} is not dummy MTU 3000 minus IPv6 header length" 1984 fail=1 1985 fi 1986 1987 # Move it back, passing MTU, check MTU is not overridden 1988 run_cmd ${ns_a} ip link set vti6_a mtu 1280 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1 1989 mtu="$(link_get_mtu "${ns_a}" vti6_a)" 1990 if [ ${mtu} -ne 1280 ]; then 1991 err " vti6 MTU ${mtu} doesn't match configured value 1280" 1992 fail=1 1993 fi 1994 1995 return ${fail} 1996} 1997 1998check_command() { 1999 cmd=${1} 2000 2001 if ! which ${cmd} > /dev/null 2>&1; then 2002 err " missing required command: '${cmd}'" 2003 return 1 2004 fi 2005 return 0 2006} 2007 2008check_running() { 2009 pid=${1} 2010 cmd=${2} 2011 2012 [ "$(cat /proc/${pid}/cmdline 2>/dev/null | tr -d '\0')" = "${cmd}" ] 2013} 2014 2015test_cleanup_vxlanX_exception() { 2016 outer="${1}" 2017 encap="vxlan" 2018 ll_mtu=4000 2019 2020 check_command taskset || return $ksft_skip 2021 cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) 2022 2023 setup namespaces routing ${encap}${outer} || return $ksft_skip 2024 trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \ 2025 "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2026 "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B 2027 2028 # Create route exception by exceeding link layer MTU 2029 mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000)) 2030 mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000)) 2031 mtu "${ns_b}" veth_B-R1 ${ll_mtu} 2032 mtu "${ns_r1}" veth_R1-B ${ll_mtu} 2033 2034 mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000)) 2035 mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000)) 2036 2037 # Fill exception cache for multiple CPUs (2) 2038 # we can always use inner IPv4 for that 2039 for cpu in ${cpu_list}; do 2040 run_cmd taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr} 2041 done 2042 2043 ${ns_a} ip link del dev veth_A-R1 & 2044 iplink_pid=$! 2045 for i in $(seq 1 20); do 2046 check_running ${iplink_pid} "iplinkdeldevveth_A-R1" || return 0 2047 sleep 0.1 2048 done 2049 err " can't delete veth device in a timely manner, PMTU dst likely leaked" 2050 return 1 2051} 2052 2053test_cleanup_ipv6_exception() { 2054 test_cleanup_vxlanX_exception 6 2055} 2056 2057test_cleanup_ipv4_exception() { 2058 test_cleanup_vxlanX_exception 4 2059} 2060 2061run_test() { 2062 ( 2063 tname="$1" 2064 tdesc="$2" 2065 2066 unset IFS 2067 2068 # Since cleanup() relies on variables modified by this subshell, it 2069 # has to run in this context. 2070 trap cleanup EXIT 2071 2072 if [ "$VERBOSE" = "1" ]; then 2073 printf "\n##########################################################################\n\n" 2074 fi 2075 2076 eval test_${tname} 2077 ret=$? 2078 2079 if [ $ret -eq 0 ]; then 2080 printf "TEST: %-60s [ OK ]\n" "${tdesc}" 2081 elif [ $ret -eq 1 ]; then 2082 printf "TEST: %-60s [FAIL]\n" "${tdesc}" 2083 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 2084 echo 2085 echo "Pausing. Hit enter to continue" 2086 read a 2087 fi 2088 err_flush 2089 exit 1 2090 elif [ $ret -eq $ksft_skip ]; then 2091 printf "TEST: %-60s [SKIP]\n" "${tdesc}" 2092 err_flush 2093 fi 2094 2095 return $ret 2096 ) 2097 ret=$? 2098 case $ret in 2099 0) 2100 all_skipped=false 2101 [ $exitcode -eq $ksft_skip ] && exitcode=0 2102 ;; 2103 $ksft_skip) 2104 [ $all_skipped = true ] && exitcode=$ksft_skip 2105 ;; 2106 *) 2107 all_skipped=false 2108 exitcode=1 2109 ;; 2110 esac 2111 2112 return $ret 2113} 2114 2115run_test_nh() { 2116 tname="$1" 2117 tdesc="$2" 2118 2119 USE_NH=yes 2120 run_test "${tname}" "${tdesc} - nexthop objects" 2121 USE_NH=no 2122} 2123 2124test_list_flush_ipv4_exception() { 2125 setup namespaces routing || return $ksft_skip 2126 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2127 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2128 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2129 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2130 2131 dst_prefix1="${prefix4}.${b_r1}." 2132 dst2="${prefix4}.${b_r2}.1" 2133 2134 # Set up initial MTU values 2135 mtu "${ns_a}" veth_A-R1 2000 2136 mtu "${ns_r1}" veth_R1-A 2000 2137 mtu "${ns_r1}" veth_R1-B 1500 2138 mtu "${ns_b}" veth_B-R1 1500 2139 2140 mtu "${ns_a}" veth_A-R2 2000 2141 mtu "${ns_r2}" veth_R2-A 2000 2142 mtu "${ns_r2}" veth_R2-B 1500 2143 mtu "${ns_b}" veth_B-R2 1500 2144 2145 fail=0 2146 2147 # Add 100 addresses for veth endpoint on B reached by default A route 2148 for i in $(seq 100 199); do 2149 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2150 done 2151 2152 # Create 100 cached route exceptions for path via R1, one via R2. Note 2153 # that with IPv4 we need to actually cause a route lookup that matches 2154 # the exception caused by ICMP, in order to actually have a cached 2155 # route, so we need to ping each destination twice 2156 for i in $(seq 100 199); do 2157 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}" 2158 done 2159 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}" 2160 2161 if [ "$(${ns_a} ip -oneline route list cache | wc -l)" -ne 101 ]; then 2162 err " can't list cached exceptions" 2163 fail=1 2164 fi 2165 2166 run_cmd ${ns_a} ip route flush cache 2167 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)" 2168 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)" 2169 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2170 [ -n "$(${ns_a} ip route list cache)" ]; then 2171 err " can't flush cached exceptions" 2172 fail=1 2173 fi 2174 2175 return ${fail} 2176} 2177 2178test_list_flush_ipv6_exception() { 2179 setup namespaces routing || return $ksft_skip 2180 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2181 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2182 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2183 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2184 2185 dst_prefix1="${prefix6}:${b_r1}::" 2186 dst2="${prefix6}:${b_r2}::1" 2187 2188 # Set up initial MTU values 2189 mtu "${ns_a}" veth_A-R1 2000 2190 mtu "${ns_r1}" veth_R1-A 2000 2191 mtu "${ns_r1}" veth_R1-B 1500 2192 mtu "${ns_b}" veth_B-R1 1500 2193 2194 mtu "${ns_a}" veth_A-R2 2000 2195 mtu "${ns_r2}" veth_R2-A 2000 2196 mtu "${ns_r2}" veth_R2-B 1500 2197 mtu "${ns_b}" veth_B-R2 1500 2198 2199 fail=0 2200 2201 # Add 100 addresses for veth endpoint on B reached by default A route 2202 for i in $(seq 100 199); do 2203 run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1 2204 done 2205 2206 # Create 100 cached route exceptions for path via R1, one via R2 2207 for i in $(seq 100 199); do 2208 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}" 2209 done 2210 run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}" 2211 if [ "$(${ns_a} ip -oneline -6 route list cache | wc -l)" -ne 101 ]; then 2212 err " can't list cached exceptions" 2213 fail=1 2214 fi 2215 2216 run_cmd ${ns_a} ip -6 route flush cache 2217 pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")" 2218 pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2219 if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \ 2220 [ -n "$(${ns_a} ip -6 route list cache)" ]; then 2221 err " can't flush cached exceptions" 2222 fail=1 2223 fi 2224 2225 return ${fail} 2226} 2227 2228test_pmtu_ipvX_route_change() { 2229 family=${1} 2230 2231 setup namespaces routing || return 2 2232 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2233 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2234 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2235 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2236 2237 if [ ${family} -eq 4 ]; then 2238 ping=ping 2239 dst1="${prefix4}.${b_r1}.1" 2240 dst2="${prefix4}.${b_r2}.1" 2241 gw="${prefix4}.${a_r1}.2" 2242 else 2243 ping=${ping6} 2244 dst1="${prefix6}:${b_r1}::1" 2245 dst2="${prefix6}:${b_r2}::1" 2246 gw="${prefix6}:${a_r1}::2" 2247 fi 2248 2249 # Set up initial MTU values 2250 mtu "${ns_a}" veth_A-R1 2000 2251 mtu "${ns_r1}" veth_R1-A 2000 2252 mtu "${ns_r1}" veth_R1-B 1400 2253 mtu "${ns_b}" veth_B-R1 1400 2254 2255 mtu "${ns_a}" veth_A-R2 2000 2256 mtu "${ns_r2}" veth_R2-A 2000 2257 mtu "${ns_r2}" veth_R2-B 1500 2258 mtu "${ns_b}" veth_B-R2 1500 2259 2260 # Create route exceptions 2261 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1} 2262 run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2} 2263 2264 # Check that exceptions have been created with the correct PMTU 2265 pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})" 2266 check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 2267 pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})" 2268 check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 2269 2270 # Replace the route from A to R1 2271 run_cmd ${ns_a} ip route change default via ${gw} 2272 2273 # Delete the device in A 2274 run_cmd ${ns_a} ip link del "veth_A-R1" 2275} 2276 2277test_pmtu_ipv4_route_change() { 2278 test_pmtu_ipvX_route_change 4 2279} 2280 2281test_pmtu_ipv6_route_change() { 2282 test_pmtu_ipvX_route_change 6 2283} 2284 2285test_pmtu_ipv4_mp_exceptions() { 2286 setup namespaces routing multipath || return $ksft_skip 2287 2288 trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ 2289 "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ 2290 "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ 2291 "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 2292 2293 # Set up initial MTU values 2294 mtu "${ns_a}" veth_A-R1 2000 2295 mtu "${ns_r1}" veth_R1-A 2000 2296 mtu "${ns_r1}" veth_R1-B 1500 2297 mtu "${ns_b}" veth_B-R1 1500 2298 2299 mtu "${ns_a}" veth_A-R2 2000 2300 mtu "${ns_r2}" veth_R2-A 2000 2301 mtu "${ns_r2}" veth_R2-B 1500 2302 mtu "${ns_b}" veth_B-R2 1500 2303 2304 # Ping and expect two nexthop exceptions for two routes 2305 run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}" 2306 2307 # Check that exceptions have been created with the correct PMTU 2308 pmtu_a_R1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R1)" 2309 pmtu_a_R2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R2)" 2310 2311 check_pmtu_value "1500" "${pmtu_a_R1}" "exceeding MTU (veth_A-R1)" || return 1 2312 check_pmtu_value "1500" "${pmtu_a_R2}" "exceeding MTU (veth_A-R2)" || return 1 2313} 2314 2315usage() { 2316 echo 2317 echo "$0 [OPTIONS] [TEST]..." 2318 echo "If no TEST argument is given, all tests will be run." 2319 echo 2320 echo "Options" 2321 echo " --trace: capture traffic to TEST_INTERFACE.pcap" 2322 echo 2323 echo "Available tests${tests}" 2324 exit 1 2325} 2326 2327################################################################################ 2328# 2329exitcode=0 2330desc=0 2331all_skipped=true 2332 2333while getopts :ptv o 2334do 2335 case $o in 2336 p) PAUSE_ON_FAIL=yes;; 2337 v) VERBOSE=1;; 2338 t) if which tcpdump > /dev/null 2>&1; then 2339 TRACING=1 2340 else 2341 echo "=== tcpdump not available, tracing disabled" 2342 fi 2343 ;; 2344 *) usage;; 2345 esac 2346done 2347shift $(($OPTIND-1)) 2348 2349IFS=" 2350" 2351 2352for arg do 2353 # Check first that all requested tests are available before running any 2354 command -v > /dev/null "test_${arg}" || { echo "=== Test ${arg} not found"; usage; } 2355done 2356 2357trap cleanup EXIT 2358 2359# start clean 2360cleanup 2361 2362HAVE_NH=no 2363ip nexthop ls >/dev/null 2>&1 2364[ $? -eq 0 ] && HAVE_NH=yes 2365 2366name="" 2367desc="" 2368rerun_nh=0 2369for t in ${tests}; do 2370 [ "${name}" = "" ] && name="${t}" && continue 2371 [ "${desc}" = "" ] && desc="${t}" && continue 2372 2373 if [ "${HAVE_NH}" = "yes" ]; then 2374 rerun_nh="${t}" 2375 fi 2376 2377 run_this=1 2378 for arg do 2379 [ "${arg}" != "${arg#--*}" ] && continue 2380 [ "${arg}" = "${name}" ] && run_this=1 && break 2381 run_this=0 2382 done 2383 if [ $run_this -eq 1 ]; then 2384 run_test "${name}" "${desc}" 2385 # if test was skipped no need to retry with nexthop objects 2386 [ $? -eq $ksft_skip ] && rerun_nh=0 2387 2388 if [ "${rerun_nh}" = "1" ]; then 2389 run_test_nh "${name}" "${desc}" 2390 fi 2391 fi 2392 name="" 2393 desc="" 2394 rerun_nh=0 2395done 2396 2397exit ${exitcode} 2398