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