mirror of https://gitee.com/openkylin/linux.git
1855 lines
55 KiB
Bash
Executable File
1855 lines
55 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Check that route PMTU values match expectations, and that initial device MTU
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# values are assigned correctly
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#
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# Tests currently implemented:
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#
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# - pmtu_ipv4
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# Set up two namespaces, A and B, with two paths between them over routers
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# R1 and R2 (also implemented with namespaces), with different MTUs:
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#
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# segment a_r1 segment b_r1 a_r1: 2000
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# .--------------R1--------------. b_r1: 1400
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# A B a_r2: 2000
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# '--------------R2--------------' b_r2: 1500
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# segment a_r2 segment b_r2
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#
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# Check that PMTU exceptions with the correct PMTU are created. Then
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# decrease and increase the MTU of the local link for one of the paths,
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# A to R1, checking that route exception PMTU changes accordingly over
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# this path. Also check that locked exceptions are created when an ICMP
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# message advertising a PMTU smaller than net.ipv4.route.min_pmtu is
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# received
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#
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# - pmtu_ipv6
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# Same as pmtu_ipv4, except for locked PMTU tests, using IPv6
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#
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# - pmtu_ipv4_vxlan4_exception
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# Set up the same network topology as pmtu_ipv4, create a VXLAN tunnel
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# over IPv4 between A and B, routed via R1. On the link between R1 and B,
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# set a MTU lower than the VXLAN MTU and the MTU on the link between A and
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# R1. Send IPv4 packets, exceeding the MTU between R1 and B, over VXLAN
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# from A to B and check that the PMTU exception is created with the right
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# value on A
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#
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# - pmtu_ipv6_vxlan4_exception
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# Same as pmtu_ipv4_vxlan4_exception, but send IPv6 packets from A to B
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#
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# - pmtu_ipv4_vxlan6_exception
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# Same as pmtu_ipv4_vxlan4_exception, but use IPv6 transport from A to B
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#
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# - pmtu_ipv6_vxlan6_exception
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# Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B
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#
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# - pmtu_ipv4_geneve4_exception
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# Same as pmtu_ipv4_vxlan4_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv6_geneve4_exception
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# Same as pmtu_ipv6_vxlan4_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv4_geneve6_exception
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# Same as pmtu_ipv4_vxlan6_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv6_geneve6_exception
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# Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv{4,6}_br_vxlan{4,6}_exception
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# Set up three namespaces, A, B, and C, with routing between A and B over
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# R1. R2 is unused in these tests. A has a veth connection to C, and is
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# connected to B via a VXLAN endpoint, which is directly bridged to C.
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# MTU on the B-R1 link is lower than other MTUs.
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#
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# Check that both C and A are able to communicate with B over the VXLAN
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# tunnel, and that PMTU exceptions with the correct values are created.
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#
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# segment a_r1 segment b_r1 b_r1: 4000
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# .--------------R1--------------. everything
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# C---veth A B else: 5000
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# ' bridge |
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# '---- - - - - - VXLAN - - - - - - - '
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#
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# - pmtu_ipv{4,6}_br_geneve{4,6}_exception
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# Same as pmtu_ipv{4,6}_br_vxlan{4,6}_exception, with a GENEVE tunnel
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# instead.
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#
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# - pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception
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# Set up two namespaces, B, and C, with routing between the init namespace
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# and B over R1. A and R2 are unused in these tests. The init namespace
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# has a veth connection to C, and is connected to B via a VXLAN endpoint,
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# which is handled by Open vSwitch and bridged to C. MTU on the B-R1 link
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# is lower than other MTUs.
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#
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# Check that C is able to communicate with B over the VXLAN tunnel, and
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# that PMTU exceptions with the correct values are created.
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#
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# segment a_r1 segment b_r1 b_r1: 4000
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# .--------------R1--------------. everything
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# C---veth init B else: 5000
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# '- ovs |
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# '---- - - - - - VXLAN - - - - - - - '
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#
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# - pmtu_ipv{4,6}_ovs_geneve{4,6}_exception
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# Same as pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception, with a GENEVE tunnel
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# instead.
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#
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# - pmtu_ipv{4,6}_fou{4,6}_exception
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# Same as pmtu_ipv4_vxlan4, but using a direct IPv4/IPv6 encapsulation
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# (FoU) over IPv4/IPv6, instead of VXLAN
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#
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# - pmtu_ipv{4,6}_fou{4,6}_exception
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# Same as pmtu_ipv4_vxlan4, but using a generic UDP IPv4/IPv6
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# encapsulation (GUE) over IPv4/IPv6, instead of VXLAN
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#
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# - pmtu_ipv{4,6}_ipv{4,6}_exception
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# Same as pmtu_ipv4_vxlan4, but using a IPv4/IPv6 tunnel over IPv4/IPv6,
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# instead of VXLAN
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#
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# - pmtu_vti4_exception
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# Set up vti tunnel on top of veth, with xfrm states and policies, in two
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# namespaces with matching endpoints. Check that route exception is not
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# created if link layer MTU is not exceeded, then exceed it and check that
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# exception is created with the expected PMTU. The approach described
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# below for IPv6 doesn't apply here, because, on IPv4, administrative MTU
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# changes alone won't affect PMTU
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#
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# - pmtu_vti6_exception
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# Set up vti6 tunnel on top of veth, with xfrm states and policies, in two
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# namespaces with matching endpoints. Check that route exception is
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# created by exceeding link layer MTU with ping to other endpoint. Then
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# decrease and increase MTU of tunnel, checking that route exception PMTU
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# changes accordingly
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#
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# - pmtu_vti4_default_mtu
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# Set up vti4 tunnel on top of veth, in two namespaces with matching
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# endpoints. Check that MTU assigned to vti interface is the MTU of the
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# lower layer (veth) minus additional lower layer headers (zero, for veth)
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# minus IPv4 header length
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#
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# - pmtu_vti6_default_mtu
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# Same as above, for IPv6
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#
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# - pmtu_vti4_link_add_mtu
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# Set up vti4 interface passing MTU value at link creation, check MTU is
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# configured, and that link is not created with invalid MTU values
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#
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# - pmtu_vti6_link_add_mtu
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# Same as above, for IPv6
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#
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# - pmtu_vti6_link_change_mtu
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# Set up two dummy interfaces with different MTUs, create a vti6 tunnel
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# and check that configured MTU is used on link creation and changes, and
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# that MTU is properly calculated instead when MTU is not configured from
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# userspace
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#
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# - cleanup_ipv4_exception
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# Similar to pmtu_ipv4_vxlan4_exception, but explicitly generate PMTU
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# exceptions on multiple CPUs and check that the veth device tear-down
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# happens in a timely manner
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#
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# - cleanup_ipv6_exception
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# Same as above, but use IPv6 transport from A to B
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#
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# - list_flush_ipv4_exception
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# Using the same topology as in pmtu_ipv4, create exceptions, and check
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# they are shown when listing exception caches, gone after flushing them
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#
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# - list_flush_ipv6_exception
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# Using the same topology as in pmtu_ipv6, create exceptions, and check
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# they are shown when listing exception caches, gone after flushing them
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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PAUSE_ON_FAIL=no
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VERBOSE=0
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TRACING=0
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# Some systems don't have a ping6 binary anymore
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which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
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# Name Description re-run with nh
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tests="
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pmtu_ipv4_exception ipv4: PMTU exceptions 1
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pmtu_ipv6_exception ipv6: PMTU exceptions 1
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pmtu_ipv4_vxlan4_exception IPv4 over vxlan4: PMTU exceptions 1
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pmtu_ipv6_vxlan4_exception IPv6 over vxlan4: PMTU exceptions 1
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pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions 1
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pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: PMTU exceptions 1
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pmtu_ipv4_geneve4_exception IPv4 over geneve4: PMTU exceptions 1
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pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions 1
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pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions 1
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pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions 1
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pmtu_ipv4_br_vxlan4_exception IPv4, bridged vxlan4: PMTU exceptions 1
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pmtu_ipv6_br_vxlan4_exception IPv6, bridged vxlan4: PMTU exceptions 1
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pmtu_ipv4_br_vxlan6_exception IPv4, bridged vxlan6: PMTU exceptions 1
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pmtu_ipv6_br_vxlan6_exception IPv6, bridged vxlan6: PMTU exceptions 1
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pmtu_ipv4_br_geneve4_exception IPv4, bridged geneve4: PMTU exceptions 1
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pmtu_ipv6_br_geneve4_exception IPv6, bridged geneve4: PMTU exceptions 1
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pmtu_ipv4_br_geneve6_exception IPv4, bridged geneve6: PMTU exceptions 1
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pmtu_ipv6_br_geneve6_exception IPv6, bridged geneve6: PMTU exceptions 1
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pmtu_ipv4_ovs_vxlan4_exception IPv4, OVS vxlan4: PMTU exceptions 1
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pmtu_ipv6_ovs_vxlan4_exception IPv6, OVS vxlan4: PMTU exceptions 1
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pmtu_ipv4_ovs_vxlan6_exception IPv4, OVS vxlan6: PMTU exceptions 1
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pmtu_ipv6_ovs_vxlan6_exception IPv6, OVS vxlan6: PMTU exceptions 1
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pmtu_ipv4_ovs_geneve4_exception IPv4, OVS geneve4: PMTU exceptions 1
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pmtu_ipv6_ovs_geneve4_exception IPv6, OVS geneve4: PMTU exceptions 1
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pmtu_ipv4_ovs_geneve6_exception IPv4, OVS geneve6: PMTU exceptions 1
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pmtu_ipv6_ovs_geneve6_exception IPv6, OVS geneve6: PMTU exceptions 1
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pmtu_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions 1
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pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions 1
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pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions 1
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pmtu_ipv6_fou6_exception IPv6 over fou6: PMTU exceptions 1
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pmtu_ipv4_gue4_exception IPv4 over gue4: PMTU exceptions 1
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pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions 1
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pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions 1
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pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions 1
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pmtu_ipv4_ipv4_exception IPv4 over IPv4: PMTU exceptions 1
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pmtu_ipv6_ipv4_exception IPv6 over IPv4: PMTU exceptions 1
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pmtu_ipv4_ipv6_exception IPv4 over IPv6: PMTU exceptions 1
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pmtu_ipv6_ipv6_exception IPv6 over IPv6: PMTU exceptions 1
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pmtu_vti6_exception vti6: PMTU exceptions 0
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pmtu_vti4_exception vti4: PMTU exceptions 0
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pmtu_vti4_default_mtu vti4: default MTU assignment 0
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pmtu_vti6_default_mtu vti6: default MTU assignment 0
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pmtu_vti4_link_add_mtu vti4: MTU setting on link creation 0
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pmtu_vti6_link_add_mtu vti6: MTU setting on link creation 0
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pmtu_vti6_link_change_mtu vti6: MTU changes on link changes 0
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cleanup_ipv4_exception ipv4: cleanup of cached exceptions 1
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cleanup_ipv6_exception ipv6: cleanup of cached exceptions 1
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list_flush_ipv4_exception ipv4: list and flush cached exceptions 1
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list_flush_ipv6_exception ipv6: list and flush cached exceptions 1"
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NS_A="ns-A"
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NS_B="ns-B"
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NS_C="ns-C"
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NS_R1="ns-R1"
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NS_R2="ns-R2"
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ns_a="ip netns exec ${NS_A}"
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ns_b="ip netns exec ${NS_B}"
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ns_c="ip netns exec ${NS_C}"
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ns_r1="ip netns exec ${NS_R1}"
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ns_r2="ip netns exec ${NS_R2}"
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# Addressing and routing for tests with routers: four network segments, with
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# index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an
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# identifier ID, which is 1 for hosts (A and B), 2 for routers (R1 and R2).
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# Addresses are:
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# - IPv4: PREFIX4.SEGMENT.ID (/24)
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# - IPv6: PREFIX6:SEGMENT::ID (/64)
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prefix4="10.0"
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prefix6="fc00"
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a_r1=1
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a_r2=2
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b_r1=3
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b_r2=4
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# ns peer segment
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routing_addrs="
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A R1 ${a_r1}
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A R2 ${a_r2}
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B R1 ${b_r1}
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B R2 ${b_r2}
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"
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# Traffic from A to B goes through R1 by default, and through R2, if destined to
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# B's address on the b_r2 segment.
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# Traffic from B to A goes through R1.
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# ns destination gateway
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routes="
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A default ${prefix4}.${a_r1}.2
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A ${prefix4}.${b_r2}.1 ${prefix4}.${a_r2}.2
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B default ${prefix4}.${b_r1}.2
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A default ${prefix6}:${a_r1}::2
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A ${prefix6}:${b_r2}::1 ${prefix6}:${a_r2}::2
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B default ${prefix6}:${b_r1}::2
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"
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USE_NH="no"
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# ns family nh id destination gateway
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nexthops="
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A 4 41 ${prefix4}.${a_r1}.2 veth_A-R1
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A 4 42 ${prefix4}.${a_r2}.2 veth_A-R2
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B 4 41 ${prefix4}.${b_r1}.2 veth_B-R1
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A 6 61 ${prefix6}:${a_r1}::2 veth_A-R1
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A 6 62 ${prefix6}:${a_r2}::2 veth_A-R2
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B 6 61 ${prefix6}:${b_r1}::2 veth_B-R1
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"
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# nexthop id correlates to id in nexthops config above
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# ns family prefix nh id
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routes_nh="
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A 4 default 41
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A 4 ${prefix4}.${b_r2}.1 42
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B 4 default 41
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A 6 default 61
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A 6 ${prefix6}:${b_r2}::1 62
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B 6 default 61
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"
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veth4_a_addr="192.168.1.1"
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veth4_b_addr="192.168.1.2"
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veth4_c_addr="192.168.2.10"
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veth4_mask="24"
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veth6_a_addr="fd00:1::a"
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veth6_b_addr="fd00:1::b"
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veth6_c_addr="fd00:2::c"
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veth6_mask="64"
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tunnel4_a_addr="192.168.2.1"
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tunnel4_b_addr="192.168.2.2"
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tunnel4_mask="24"
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tunnel6_a_addr="fd00:2::a"
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tunnel6_b_addr="fd00:2::b"
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tunnel6_mask="64"
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dummy6_0_prefix="fc00:1000::"
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dummy6_1_prefix="fc00:1001::"
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dummy6_mask="64"
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err_buf=
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tcpdump_pids=
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err() {
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err_buf="${err_buf}${1}
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"
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}
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err_flush() {
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echo -n "${err_buf}"
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err_buf=
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}
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run_cmd() {
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cmd="$*"
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if [ "$VERBOSE" = "1" ]; then
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printf " COMMAND: $cmd\n"
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fi
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out="$($cmd 2>&1)"
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rc=$?
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if [ "$VERBOSE" = "1" -a -n "$out" ]; then
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echo " $out"
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echo
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fi
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return $rc
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}
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# Find the auto-generated name for this namespace
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nsname() {
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eval echo \$NS_$1
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}
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setup_fou_or_gue() {
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outer="${1}"
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inner="${2}"
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encap="${3}"
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if [ "${outer}" = "4" ]; then
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modprobe fou || return 2
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a_addr="${prefix4}.${a_r1}.1"
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b_addr="${prefix4}.${b_r1}.1"
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if [ "${inner}" = "4" ]; then
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type="ipip"
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ipproto="4"
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else
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type="sit"
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ipproto="41"
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fi
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else
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modprobe fou6 || return 2
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a_addr="${prefix6}:${a_r1}::1"
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b_addr="${prefix6}:${b_r1}::1"
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if [ "${inner}" = "4" ]; then
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type="ip6tnl"
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mode="mode ipip6"
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ipproto="4 -6"
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else
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type="ip6tnl"
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mode="mode ip6ip6"
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ipproto="41 -6"
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fi
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fi
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run_cmd ${ns_a} ip fou add port 5555 ipproto ${ipproto} || return 2
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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 2
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run_cmd ${ns_b} ip fou add port 5556 ipproto ${ipproto}
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run_cmd ${ns_b} ip link add ${encap}_b type ${type} ${mode} local ${b_addr} remote ${a_addr} encap ${encap} encap-sport auto encap-dport 5555
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if [ "${inner}" = "4" ]; then
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run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${encap}_a
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run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${encap}_b
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else
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run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${encap}_a
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run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${encap}_b
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fi
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run_cmd ${ns_a} ip link set ${encap}_a up
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run_cmd ${ns_b} ip link set ${encap}_b up
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}
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setup_fou44() {
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setup_fou_or_gue 4 4 fou
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}
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setup_fou46() {
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setup_fou_or_gue 4 6 fou
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}
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setup_fou64() {
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setup_fou_or_gue 6 4 fou
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}
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|
|
|
setup_fou66() {
|
|
setup_fou_or_gue 6 6 fou
|
|
}
|
|
|
|
setup_gue44() {
|
|
setup_fou_or_gue 4 4 gue
|
|
}
|
|
|
|
setup_gue46() {
|
|
setup_fou_or_gue 4 6 gue
|
|
}
|
|
|
|
setup_gue64() {
|
|
setup_fou_or_gue 6 4 gue
|
|
}
|
|
|
|
setup_gue66() {
|
|
setup_fou_or_gue 6 6 gue
|
|
}
|
|
|
|
setup_ipvX_over_ipvY() {
|
|
inner=${1}
|
|
outer=${2}
|
|
|
|
if [ "${outer}" -eq 4 ]; then
|
|
a_addr="${prefix4}.${a_r1}.1"
|
|
b_addr="${prefix4}.${b_r1}.1"
|
|
if [ "${inner}" -eq 4 ]; then
|
|
type="ipip"
|
|
mode="ipip"
|
|
else
|
|
type="sit"
|
|
mode="ip6ip"
|
|
fi
|
|
else
|
|
a_addr="${prefix6}:${a_r1}::1"
|
|
b_addr="${prefix6}:${b_r1}::1"
|
|
type="ip6tnl"
|
|
if [ "${inner}" -eq 4 ]; then
|
|
mode="ipip6"
|
|
else
|
|
mode="ip6ip6"
|
|
fi
|
|
fi
|
|
|
|
run_cmd ${ns_a} ip link add ip_a type ${type} local ${a_addr} remote ${b_addr} mode ${mode} || return 2
|
|
run_cmd ${ns_b} ip link add ip_b type ${type} local ${b_addr} remote ${a_addr} mode ${mode}
|
|
|
|
run_cmd ${ns_a} ip link set ip_a up
|
|
run_cmd ${ns_b} ip link set ip_b up
|
|
|
|
if [ "${inner}" = "4" ]; then
|
|
run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ip_a
|
|
run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ip_b
|
|
else
|
|
run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ip_a
|
|
run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ip_b
|
|
fi
|
|
}
|
|
|
|
setup_ip4ip4() {
|
|
setup_ipvX_over_ipvY 4 4
|
|
}
|
|
|
|
setup_ip6ip4() {
|
|
setup_ipvX_over_ipvY 6 4
|
|
}
|
|
|
|
setup_ip4ip6() {
|
|
setup_ipvX_over_ipvY 4 6
|
|
}
|
|
|
|
setup_ip6ip6() {
|
|
setup_ipvX_over_ipvY 6 6
|
|
}
|
|
|
|
setup_namespaces() {
|
|
for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do
|
|
ip netns add ${n} || return 1
|
|
|
|
# Disable DAD, so that we don't have to wait to use the
|
|
# configured IPv6 addresses
|
|
ip netns exec ${n} sysctl -q net/ipv6/conf/default/accept_dad=0
|
|
done
|
|
}
|
|
|
|
setup_veth() {
|
|
run_cmd ${ns_a} ip link add veth_a type veth peer name veth_b || return 1
|
|
run_cmd ${ns_a} ip link set veth_b netns ${NS_B}
|
|
|
|
run_cmd ${ns_a} ip addr add ${veth4_a_addr}/${veth4_mask} dev veth_a
|
|
run_cmd ${ns_b} ip addr add ${veth4_b_addr}/${veth4_mask} dev veth_b
|
|
|
|
run_cmd ${ns_a} ip addr add ${veth6_a_addr}/${veth6_mask} dev veth_a
|
|
run_cmd ${ns_b} ip addr add ${veth6_b_addr}/${veth6_mask} dev veth_b
|
|
|
|
run_cmd ${ns_a} ip link set veth_a up
|
|
run_cmd ${ns_b} ip link set veth_b up
|
|
}
|
|
|
|
setup_vti() {
|
|
proto=${1}
|
|
veth_a_addr="${2}"
|
|
veth_b_addr="${3}"
|
|
vti_a_addr="${4}"
|
|
vti_b_addr="${5}"
|
|
vti_mask=${6}
|
|
|
|
[ ${proto} -eq 6 ] && vti_type="vti6" || vti_type="vti"
|
|
|
|
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
|
|
run_cmd ${ns_b} ip link add vti${proto}_b type ${vti_type} local ${veth_b_addr} remote ${veth_a_addr} key 10
|
|
|
|
run_cmd ${ns_a} ip addr add ${vti_a_addr}/${vti_mask} dev vti${proto}_a
|
|
run_cmd ${ns_b} ip addr add ${vti_b_addr}/${vti_mask} dev vti${proto}_b
|
|
|
|
run_cmd ${ns_a} ip link set vti${proto}_a up
|
|
run_cmd ${ns_b} ip link set vti${proto}_b up
|
|
}
|
|
|
|
setup_vti4() {
|
|
setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask}
|
|
}
|
|
|
|
setup_vti6() {
|
|
setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask}
|
|
}
|
|
|
|
setup_vxlan_or_geneve() {
|
|
type="${1}"
|
|
a_addr="${2}"
|
|
b_addr="${3}"
|
|
opts="${4}"
|
|
br_if_a="${5}"
|
|
|
|
if [ "${type}" = "vxlan" ]; then
|
|
opts="${opts} ttl 64 dstport 4789"
|
|
opts_a="local ${a_addr}"
|
|
opts_b="local ${b_addr}"
|
|
else
|
|
opts_a=""
|
|
opts_b=""
|
|
fi
|
|
|
|
run_cmd ${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1
|
|
run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts}
|
|
|
|
if [ -n "${br_if_a}" ]; then
|
|
run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${br_if_a}
|
|
run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${br_if_a}
|
|
run_cmd ${ns_a} ip link set ${type}_a master ${br_if_a}
|
|
else
|
|
run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a
|
|
run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a
|
|
fi
|
|
|
|
run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
|
|
run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
|
|
|
|
run_cmd ${ns_a} ip link set ${type}_a up
|
|
run_cmd ${ns_b} ip link set ${type}_b up
|
|
}
|
|
|
|
setup_geneve4() {
|
|
setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"
|
|
}
|
|
|
|
setup_vxlan4() {
|
|
setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"
|
|
}
|
|
|
|
setup_geneve6() {
|
|
setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ""
|
|
}
|
|
|
|
setup_vxlan6() {
|
|
setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ""
|
|
}
|
|
|
|
setup_bridged_geneve4() {
|
|
setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0"
|
|
}
|
|
|
|
setup_bridged_vxlan4() {
|
|
setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0"
|
|
}
|
|
|
|
setup_bridged_geneve6() {
|
|
setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0"
|
|
}
|
|
|
|
setup_bridged_vxlan6() {
|
|
setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0"
|
|
}
|
|
|
|
setup_xfrm() {
|
|
proto=${1}
|
|
veth_a_addr="${2}"
|
|
veth_b_addr="${3}"
|
|
|
|
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 || return 1
|
|
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
|
|
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
|
|
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
|
|
|
|
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
|
|
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
|
|
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
|
|
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
|
|
}
|
|
|
|
setup_xfrm4() {
|
|
setup_xfrm 4 ${veth4_a_addr} ${veth4_b_addr}
|
|
}
|
|
|
|
setup_xfrm6() {
|
|
setup_xfrm 6 ${veth6_a_addr} ${veth6_b_addr}
|
|
}
|
|
|
|
setup_routing_old() {
|
|
for i in ${routes}; do
|
|
[ "${ns}" = "" ] && ns="${i}" && continue
|
|
[ "${addr}" = "" ] && addr="${i}" && continue
|
|
[ "${gw}" = "" ] && gw="${i}"
|
|
|
|
ns_name="$(nsname ${ns})"
|
|
|
|
ip -n ${ns_name} route add ${addr} via ${gw}
|
|
|
|
ns=""; addr=""; gw=""
|
|
done
|
|
}
|
|
|
|
setup_routing_new() {
|
|
for i in ${nexthops}; do
|
|
[ "${ns}" = "" ] && ns="${i}" && continue
|
|
[ "${fam}" = "" ] && fam="${i}" && continue
|
|
[ "${nhid}" = "" ] && nhid="${i}" && continue
|
|
[ "${gw}" = "" ] && gw="${i}" && continue
|
|
[ "${dev}" = "" ] && dev="${i}"
|
|
|
|
ns_name="$(nsname ${ns})"
|
|
|
|
ip -n ${ns_name} -${fam} nexthop add id ${nhid} via ${gw} dev ${dev}
|
|
|
|
ns=""; fam=""; nhid=""; gw=""; dev=""
|
|
|
|
done
|
|
|
|
for i in ${routes_nh}; do
|
|
[ "${ns}" = "" ] && ns="${i}" && continue
|
|
[ "${fam}" = "" ] && fam="${i}" && continue
|
|
[ "${addr}" = "" ] && addr="${i}" && continue
|
|
[ "${nhid}" = "" ] && nhid="${i}"
|
|
|
|
ns_name="$(nsname ${ns})"
|
|
|
|
ip -n ${ns_name} -${fam} route add ${addr} nhid ${nhid}
|
|
|
|
ns=""; fam=""; addr=""; nhid=""
|
|
done
|
|
}
|
|
|
|
setup_routing() {
|
|
for i in ${NS_R1} ${NS_R2}; do
|
|
ip netns exec ${i} sysctl -q net/ipv4/ip_forward=1
|
|
ip netns exec ${i} sysctl -q net/ipv6/conf/all/forwarding=1
|
|
done
|
|
|
|
for i in ${routing_addrs}; do
|
|
[ "${ns}" = "" ] && ns="${i}" && continue
|
|
[ "${peer}" = "" ] && peer="${i}" && continue
|
|
[ "${segment}" = "" ] && segment="${i}"
|
|
|
|
ns_name="$(nsname ${ns})"
|
|
peer_name="$(nsname ${peer})"
|
|
if="veth_${ns}-${peer}"
|
|
ifpeer="veth_${peer}-${ns}"
|
|
|
|
# Create veth links
|
|
ip link add ${if} up netns ${ns_name} type veth peer name ${ifpeer} netns ${peer_name} || return 1
|
|
ip -n ${peer_name} link set dev ${ifpeer} up
|
|
|
|
# Add addresses
|
|
ip -n ${ns_name} addr add ${prefix4}.${segment}.1/24 dev ${if}
|
|
ip -n ${ns_name} addr add ${prefix6}:${segment}::1/64 dev ${if}
|
|
|
|
ip -n ${peer_name} addr add ${prefix4}.${segment}.2/24 dev ${ifpeer}
|
|
ip -n ${peer_name} addr add ${prefix6}:${segment}::2/64 dev ${ifpeer}
|
|
|
|
ns=""; peer=""; segment=""
|
|
done
|
|
|
|
if [ "$USE_NH" = "yes" ]; then
|
|
setup_routing_new
|
|
else
|
|
setup_routing_old
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
setup_bridge() {
|
|
run_cmd ${ns_a} ip link add br0 type bridge || return 2
|
|
run_cmd ${ns_a} ip link set br0 up
|
|
|
|
run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C
|
|
run_cmd ${ns_c} ip link set veth_A-C netns ns-A
|
|
|
|
run_cmd ${ns_a} ip link set veth_A-C up
|
|
run_cmd ${ns_c} ip link set veth_C-A up
|
|
run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A
|
|
run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A
|
|
run_cmd ${ns_a} ip link set veth_A-C master br0
|
|
}
|
|
|
|
setup_ovs_vxlan_or_geneve() {
|
|
type="${1}"
|
|
a_addr="${2}"
|
|
b_addr="${3}"
|
|
|
|
if [ "${type}" = "vxlan" ]; then
|
|
opts="${opts} ttl 64 dstport 4789"
|
|
opts_b="local ${b_addr}"
|
|
fi
|
|
|
|
run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \
|
|
set interface ${type}_a type=${type} \
|
|
options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1
|
|
|
|
run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1
|
|
|
|
run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
|
|
run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
|
|
|
|
run_cmd ${ns_b} ip link set ${type}_b up
|
|
}
|
|
|
|
setup_ovs_geneve4() {
|
|
setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1
|
|
}
|
|
|
|
setup_ovs_vxlan4() {
|
|
setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1
|
|
}
|
|
|
|
setup_ovs_geneve6() {
|
|
setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
|
|
}
|
|
|
|
setup_ovs_vxlan6() {
|
|
setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
|
|
}
|
|
|
|
setup_ovs_bridge() {
|
|
run_cmd ovs-vsctl add-br ovs_br0 || return 2
|
|
run_cmd ip link set ovs_br0 up
|
|
|
|
run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C
|
|
run_cmd ${ns_c} ip link set veth_A-C netns 1
|
|
|
|
run_cmd ip link set veth_A-C up
|
|
run_cmd ${ns_c} ip link set veth_C-A up
|
|
run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A
|
|
run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A
|
|
run_cmd ovs-vsctl add-port ovs_br0 veth_A-C
|
|
|
|
# Move veth_A-R1 to init
|
|
run_cmd ${ns_a} ip link set veth_A-R1 netns 1
|
|
run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1
|
|
run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1
|
|
run_cmd ip link set veth_A-R1 up
|
|
run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2
|
|
run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2
|
|
}
|
|
|
|
setup() {
|
|
[ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip
|
|
|
|
cleanup
|
|
for arg do
|
|
eval setup_${arg} || { echo " ${arg} not supported"; return 1; }
|
|
done
|
|
}
|
|
|
|
trace() {
|
|
[ $TRACING -eq 0 ] && return
|
|
|
|
for arg do
|
|
[ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue
|
|
${ns_cmd} tcpdump -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null &
|
|
tcpdump_pids="${tcpdump_pids} $!"
|
|
ns_cmd=
|
|
done
|
|
sleep 1
|
|
}
|
|
|
|
cleanup() {
|
|
for pid in ${tcpdump_pids}; do
|
|
kill ${pid}
|
|
done
|
|
tcpdump_pids=
|
|
|
|
for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do
|
|
ip netns del ${n} 2> /dev/null
|
|
done
|
|
|
|
ip link del veth_A-C 2>/dev/null
|
|
ip link del veth_A-R1 2>/dev/null
|
|
ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null
|
|
ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null
|
|
}
|
|
|
|
mtu() {
|
|
ns_cmd="${1}"
|
|
dev="${2}"
|
|
mtu="${3}"
|
|
|
|
${ns_cmd} ip link set dev ${dev} mtu ${mtu}
|
|
}
|
|
|
|
mtu_parse() {
|
|
input="${1}"
|
|
|
|
next=0
|
|
for i in ${input}; do
|
|
[ ${next} -eq 1 -a "${i}" = "lock" ] && next=2 && continue
|
|
[ ${next} -eq 1 ] && echo "${i}" && return
|
|
[ ${next} -eq 2 ] && echo "lock ${i}" && return
|
|
[ "${i}" = "mtu" ] && next=1
|
|
done
|
|
}
|
|
|
|
link_get() {
|
|
ns_cmd="${1}"
|
|
name="${2}"
|
|
|
|
${ns_cmd} ip link show dev "${name}"
|
|
}
|
|
|
|
link_get_mtu() {
|
|
ns_cmd="${1}"
|
|
name="${2}"
|
|
|
|
mtu_parse "$(link_get "${ns_cmd}" ${name})"
|
|
}
|
|
|
|
route_get_dst_exception() {
|
|
ns_cmd="${1}"
|
|
dst="${2}"
|
|
|
|
${ns_cmd} ip route get "${dst}"
|
|
}
|
|
|
|
route_get_dst_pmtu_from_exception() {
|
|
ns_cmd="${1}"
|
|
dst="${2}"
|
|
|
|
mtu_parse "$(route_get_dst_exception "${ns_cmd}" ${dst})"
|
|
}
|
|
|
|
check_pmtu_value() {
|
|
expected="${1}"
|
|
value="${2}"
|
|
event="${3}"
|
|
|
|
[ "${expected}" = "any" ] && [ -n "${value}" ] && return 0
|
|
[ "${value}" = "${expected}" ] && return 0
|
|
[ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1
|
|
[ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1
|
|
err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}"
|
|
return 1
|
|
}
|
|
|
|
test_pmtu_ipvX() {
|
|
family=${1}
|
|
|
|
setup namespaces routing || return 2
|
|
trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \
|
|
"${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
|
|
"${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
|
|
|
|
if [ ${family} -eq 4 ]; then
|
|
ping=ping
|
|
dst1="${prefix4}.${b_r1}.1"
|
|
dst2="${prefix4}.${b_r2}.1"
|
|
else
|
|
ping=${ping6}
|
|
dst1="${prefix6}:${b_r1}::1"
|
|
dst2="${prefix6}:${b_r2}::1"
|
|
fi
|
|
|
|
# Set up initial MTU values
|
|
mtu "${ns_a}" veth_A-R1 2000
|
|
mtu "${ns_r1}" veth_R1-A 2000
|
|
mtu "${ns_r1}" veth_R1-B 1400
|
|
mtu "${ns_b}" veth_B-R1 1400
|
|
|
|
mtu "${ns_a}" veth_A-R2 2000
|
|
mtu "${ns_r2}" veth_R2-A 2000
|
|
mtu "${ns_r2}" veth_R2-B 1500
|
|
mtu "${ns_b}" veth_B-R2 1500
|
|
|
|
# Create route exceptions
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst1}
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1800 ${dst2}
|
|
|
|
# Check that exceptions have been created with the correct PMTU
|
|
pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})"
|
|
check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1
|
|
|
|
# Decrease local MTU below PMTU, check for PMTU decrease in route exception
|
|
mtu "${ns_a}" veth_A-R1 1300
|
|
mtu "${ns_r1}" veth_R1-A 1300
|
|
pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})"
|
|
check_pmtu_value "1300" "${pmtu_1}" "decreasing local MTU" || return 1
|
|
# Second exception shouldn't be modified
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1
|
|
|
|
# Increase MTU, check for PMTU increase in route exception
|
|
mtu "${ns_a}" veth_A-R1 1700
|
|
mtu "${ns_r1}" veth_R1-A 1700
|
|
pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst1})"
|
|
check_pmtu_value "1700" "${pmtu_1}" "increasing local MTU" || return 1
|
|
# Second exception shouldn't be modified
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "1500" "${pmtu_2}" "changing local MTU on a link not on this path" || return 1
|
|
|
|
# Skip PMTU locking tests for IPv6
|
|
[ $family -eq 6 ] && return 0
|
|
|
|
# Decrease remote MTU on path via R2, get new exception
|
|
mtu "${ns_r2}" veth_R2-B 400
|
|
mtu "${ns_b}" veth_B-R2 400
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2}
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1
|
|
|
|
# Decrease local MTU below PMTU
|
|
mtu "${ns_a}" veth_A-R2 500
|
|
mtu "${ns_r2}" veth_R2-A 500
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "500" "${pmtu_2}" "decreasing local MTU" || return 1
|
|
|
|
# Increase local MTU
|
|
mtu "${ns_a}" veth_A-R2 1500
|
|
mtu "${ns_r2}" veth_R2-A 1500
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "1500" "${pmtu_2}" "increasing local MTU" || return 1
|
|
|
|
# Get new exception
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s 1400 ${dst2}
|
|
pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
check_pmtu_value "lock 552" "${pmtu_2}" "exceeding MTU, with MTU < min_pmtu" || return 1
|
|
}
|
|
|
|
test_pmtu_ipv4_exception() {
|
|
test_pmtu_ipvX 4
|
|
}
|
|
|
|
test_pmtu_ipv6_exception() {
|
|
test_pmtu_ipvX 6
|
|
}
|
|
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() {
|
|
type=${1}
|
|
family=${2}
|
|
outer_family=${3}
|
|
ll_mtu=4000
|
|
|
|
if [ ${outer_family} -eq 4 ]; then
|
|
setup namespaces routing ${type}4 || return 2
|
|
# IPv4 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
|
|
else
|
|
setup namespaces routing ${type}6 || return 2
|
|
# IPv6 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
|
|
fi
|
|
|
|
trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \
|
|
"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
|
|
|
|
if [ ${family} -eq 4 ]; then
|
|
ping=ping
|
|
dst=${tunnel4_b_addr}
|
|
else
|
|
ping=${ping6}
|
|
dst=${tunnel6_b_addr}
|
|
fi
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst}
|
|
|
|
# Check that exception was created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface"
|
|
}
|
|
|
|
test_pmtu_ipv4_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_geneve4_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_geneve4_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6
|
|
}
|
|
|
|
test_pmtu_ipv4_geneve6_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_geneve6_exception() {
|
|
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6
|
|
}
|
|
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() {
|
|
type=${1}
|
|
family=${2}
|
|
outer_family=${3}
|
|
ll_mtu=4000
|
|
|
|
if [ ${outer_family} -eq 4 ]; then
|
|
setup namespaces routing bridge bridged_${type}4 || return 2
|
|
# IPv4 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
|
|
else
|
|
setup namespaces routing bridge bridged_${type}6 || return 2
|
|
# IPv6 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
|
|
fi
|
|
|
|
trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \
|
|
"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \
|
|
"${ns_a}" br0 "${ns_a}" veth-A-C \
|
|
"${ns_c}" veth_C-A
|
|
|
|
if [ ${family} -eq 4 ]; then
|
|
ping=ping
|
|
dst=${tunnel4_b_addr}
|
|
else
|
|
ping=${ping6}
|
|
dst=${tunnel6_b_addr}
|
|
fi
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "${ns_a}" br0 $((${ll_mtu} + 1000))
|
|
mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000))
|
|
mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))
|
|
|
|
run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1
|
|
|
|
# Check that exceptions were created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface"
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface"
|
|
}
|
|
|
|
test_pmtu_ipv4_br_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_br_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_br_geneve4_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_br_geneve4_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_br_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_br_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6
|
|
}
|
|
|
|
test_pmtu_ipv4_br_geneve6_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_br_geneve6_exception() {
|
|
test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6
|
|
}
|
|
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() {
|
|
type=${1}
|
|
family=${2}
|
|
outer_family=${3}
|
|
ll_mtu=4000
|
|
|
|
if [ ${outer_family} -eq 4 ]; then
|
|
setup namespaces routing ovs_bridge ovs_${type}4 || return 2
|
|
# IPv4 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
|
|
else
|
|
setup namespaces routing ovs_bridge ovs_${type}6 || return 2
|
|
# IPv6 header UDP header VXLAN/GENEVE header Ethernet header
|
|
exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
|
|
fi
|
|
|
|
if [ "${type}" = "vxlan" ]; then
|
|
tun_a="vxlan_sys_4789"
|
|
elif [ "${type}" = "geneve" ]; then
|
|
tun_a="genev_sys_6081"
|
|
fi
|
|
|
|
trace "" "${tun_a}" "${ns_b}" ${type}_b \
|
|
"" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \
|
|
"" ovs_br0 "" veth-A-C \
|
|
"${ns_c}" veth_C-A
|
|
|
|
if [ ${family} -eq 4 ]; then
|
|
ping=ping
|
|
dst=${tunnel4_b_addr}
|
|
else
|
|
ping=${ping6}
|
|
dst=${tunnel6_b_addr}
|
|
fi
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "" ovs_br0 $((${ll_mtu} + 1000))
|
|
mtu "" veth_A-C $((${ll_mtu} + 1000))
|
|
mtu "${ns_c}" veth_C-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "" ${tun_a} $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))
|
|
|
|
run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1
|
|
|
|
# Check that exceptions were created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface"
|
|
}
|
|
|
|
test_pmtu_ipv4_ovs_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_ovs_vxlan4_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_ovs_geneve4_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_ovs_geneve4_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_ovs_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_ovs_vxlan6_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6
|
|
}
|
|
|
|
test_pmtu_ipv4_ovs_geneve6_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_ovs_geneve6_exception() {
|
|
test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6
|
|
}
|
|
|
|
test_pmtu_ipvX_over_fouY_or_gueY() {
|
|
inner_family=${1}
|
|
outer_family=${2}
|
|
encap=${3}
|
|
ll_mtu=4000
|
|
|
|
setup namespaces routing ${encap}${outer_family}${inner_family} || return 2
|
|
trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \
|
|
"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
|
|
|
|
if [ ${inner_family} -eq 4 ]; then
|
|
ping=ping
|
|
dst=${tunnel4_b_addr}
|
|
else
|
|
ping=${ping6}
|
|
dst=${tunnel6_b_addr}
|
|
fi
|
|
|
|
if [ "${encap}" = "gue" ]; then
|
|
encap_overhead=4
|
|
else
|
|
encap_overhead=0
|
|
fi
|
|
|
|
if [ ${outer_family} -eq 4 ]; then
|
|
# IPv4 header UDP header
|
|
exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead}))
|
|
else
|
|
# IPv6 header Option 4 UDP header
|
|
exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead}))
|
|
fi
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000))
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst}
|
|
|
|
# Check that exception was created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${encap} interface"
|
|
}
|
|
|
|
test_pmtu_ipv4_fou4_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou
|
|
}
|
|
|
|
test_pmtu_ipv6_fou4_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou
|
|
}
|
|
|
|
test_pmtu_ipv4_fou6_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou
|
|
}
|
|
|
|
test_pmtu_ipv6_fou6_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou
|
|
}
|
|
|
|
test_pmtu_ipv4_gue4_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue
|
|
}
|
|
|
|
test_pmtu_ipv6_gue4_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue
|
|
}
|
|
|
|
test_pmtu_ipv4_gue6_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue
|
|
}
|
|
|
|
test_pmtu_ipv6_gue6_exception() {
|
|
test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue
|
|
}
|
|
|
|
test_pmtu_ipvX_over_ipvY_exception() {
|
|
inner=${1}
|
|
outer=${2}
|
|
ll_mtu=4000
|
|
|
|
setup namespaces routing ip${inner}ip${outer} || return 2
|
|
|
|
trace "${ns_a}" ip_a "${ns_b}" ip_b \
|
|
"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
|
|
|
|
if [ ${inner} -eq 4 ]; then
|
|
ping=ping
|
|
dst=${tunnel4_b_addr}
|
|
else
|
|
ping=${ping6}
|
|
dst=${tunnel6_b_addr}
|
|
fi
|
|
|
|
if [ ${outer} -eq 4 ]; then
|
|
# IPv4 header
|
|
exp_mtu=$((${ll_mtu} - 20))
|
|
else
|
|
# IPv6 header Option 4
|
|
exp_mtu=$((${ll_mtu} - 40 - 8))
|
|
fi
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "${ns_a}" ip_a $((${ll_mtu} + 1000)) || return
|
|
mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return
|
|
run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst}
|
|
|
|
# Check that exception was created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
|
|
check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface"
|
|
}
|
|
|
|
test_pmtu_ipv4_ipv4_exception() {
|
|
test_pmtu_ipvX_over_ipvY_exception 4 4
|
|
}
|
|
|
|
test_pmtu_ipv6_ipv4_exception() {
|
|
test_pmtu_ipvX_over_ipvY_exception 6 4
|
|
}
|
|
|
|
test_pmtu_ipv4_ipv6_exception() {
|
|
test_pmtu_ipvX_over_ipvY_exception 4 6
|
|
}
|
|
|
|
test_pmtu_ipv6_ipv6_exception() {
|
|
test_pmtu_ipvX_over_ipvY_exception 6 6
|
|
}
|
|
|
|
test_pmtu_vti4_exception() {
|
|
setup namespaces veth vti4 xfrm4 || return 2
|
|
trace "${ns_a}" veth_a "${ns_b}" veth_b \
|
|
"${ns_a}" vti4_a "${ns_b}" vti4_b
|
|
|
|
veth_mtu=1500
|
|
vti_mtu=$((veth_mtu - 20))
|
|
|
|
# SPI SN IV ICV pad length next header
|
|
esp_payload_rfc4106=$((vti_mtu - 4 - 4 - 8 - 16 - 1 - 1))
|
|
ping_payload=$((esp_payload_rfc4106 - 28))
|
|
|
|
mtu "${ns_a}" veth_a ${veth_mtu}
|
|
mtu "${ns_b}" veth_b ${veth_mtu}
|
|
mtu "${ns_a}" vti4_a ${vti_mtu}
|
|
mtu "${ns_b}" vti4_b ${vti_mtu}
|
|
|
|
# Send DF packet without exceeding link layer MTU, check that no
|
|
# exception is created
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s ${ping_payload} ${tunnel4_b_addr}
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})"
|
|
check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" || return 1
|
|
|
|
# Now exceed link layer MTU by one byte, check that exception is created
|
|
# with the right PMTU value
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((ping_payload + 1)) ${tunnel4_b_addr}
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})"
|
|
check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))"
|
|
}
|
|
|
|
test_pmtu_vti6_exception() {
|
|
setup namespaces veth vti6 xfrm6 || return 2
|
|
trace "${ns_a}" veth_a "${ns_b}" veth_b \
|
|
"${ns_a}" vti6_a "${ns_b}" vti6_b
|
|
fail=0
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_a 4000
|
|
mtu "${ns_b}" veth_b 4000
|
|
mtu "${ns_a}" vti6_a 5000
|
|
mtu "${ns_b}" vti6_b 5000
|
|
run_cmd ${ns_a} ${ping6} -q -i 0.1 -w 1 -s 60000 ${tunnel6_b_addr}
|
|
|
|
# Check that exception was created
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
|
|
check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1
|
|
|
|
# Decrease tunnel MTU, check for PMTU decrease in route exception
|
|
mtu "${ns_a}" vti6_a 3000
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
|
|
check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1
|
|
|
|
# Increase tunnel MTU, check for PMTU increase in route exception
|
|
mtu "${ns_a}" vti6_a 9000
|
|
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
|
|
check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
test_pmtu_vti4_default_mtu() {
|
|
setup namespaces veth vti4 || return 2
|
|
|
|
# Check that MTU of vti device is MTU of veth minus IPv4 header length
|
|
veth_mtu="$(link_get_mtu "${ns_a}" veth_a)"
|
|
vti4_mtu="$(link_get_mtu "${ns_a}" vti4_a)"
|
|
if [ $((veth_mtu - vti4_mtu)) -ne 20 ]; then
|
|
err " vti MTU ${vti4_mtu} is not veth MTU ${veth_mtu} minus IPv4 header length"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
test_pmtu_vti6_default_mtu() {
|
|
setup namespaces veth vti6 || return 2
|
|
|
|
# Check that MTU of vti device is MTU of veth minus IPv6 header length
|
|
veth_mtu="$(link_get_mtu "${ns_a}" veth_a)"
|
|
vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then
|
|
err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
test_pmtu_vti4_link_add_mtu() {
|
|
setup namespaces || return 2
|
|
|
|
run_cmd ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10
|
|
[ $? -ne 0 ] && err " vti not supported" && return 2
|
|
run_cmd ${ns_a} ip link del vti4_a
|
|
|
|
fail=0
|
|
|
|
min=68
|
|
max=$((65535 - 20))
|
|
# Check invalid values first
|
|
for v in $((min - 1)) $((max + 1)); do
|
|
run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10
|
|
# This can fail, or MTU can be adjusted to a proper value
|
|
[ $? -ne 0 ] && continue
|
|
mtu="$(link_get_mtu "${ns_a}" vti4_a)"
|
|
if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then
|
|
err " vti tunnel created with invalid MTU ${mtu}"
|
|
fail=1
|
|
fi
|
|
run_cmd ${ns_a} ip link del vti4_a
|
|
done
|
|
|
|
# Now check valid values
|
|
for v in ${min} 1300 ${max}; do
|
|
run_cmd ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10
|
|
mtu="$(link_get_mtu "${ns_a}" vti4_a)"
|
|
run_cmd ${ns_a} ip link del vti4_a
|
|
if [ "${mtu}" != "${v}" ]; then
|
|
err " vti MTU ${mtu} doesn't match configured value ${v}"
|
|
fail=1
|
|
fi
|
|
done
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
test_pmtu_vti6_link_add_mtu() {
|
|
setup namespaces || return 2
|
|
|
|
run_cmd ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
|
|
[ $? -ne 0 ] && err " vti6 not supported" && return 2
|
|
run_cmd ${ns_a} ip link del vti6_a
|
|
|
|
fail=0
|
|
|
|
min=68 # vti6 can carry IPv4 packets too
|
|
max=$((65535 - 40))
|
|
# Check invalid values first
|
|
for v in $((min - 1)) $((max + 1)); do
|
|
run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
|
|
# This can fail, or MTU can be adjusted to a proper value
|
|
[ $? -ne 0 ] && continue
|
|
mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then
|
|
err " vti6 tunnel created with invalid MTU ${v}"
|
|
fail=1
|
|
fi
|
|
run_cmd ${ns_a} ip link del vti6_a
|
|
done
|
|
|
|
# Now check valid values
|
|
for v in 68 1280 1300 $((65535 - 40)); do
|
|
run_cmd ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
|
|
mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
run_cmd ${ns_a} ip link del vti6_a
|
|
if [ "${mtu}" != "${v}" ]; then
|
|
err " vti6 MTU ${mtu} doesn't match configured value ${v}"
|
|
fail=1
|
|
fi
|
|
done
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
test_pmtu_vti6_link_change_mtu() {
|
|
setup namespaces || return 2
|
|
|
|
run_cmd ${ns_a} ip link add dummy0 mtu 1500 type dummy
|
|
[ $? -ne 0 ] && err " dummy not supported" && return 2
|
|
run_cmd ${ns_a} ip link add dummy1 mtu 3000 type dummy
|
|
run_cmd ${ns_a} ip link set dummy0 up
|
|
run_cmd ${ns_a} ip link set dummy1 up
|
|
|
|
run_cmd ${ns_a} ip addr add ${dummy6_0_prefix}1/${dummy6_mask} dev dummy0
|
|
run_cmd ${ns_a} ip addr add ${dummy6_1_prefix}1/${dummy6_mask} dev dummy1
|
|
|
|
fail=0
|
|
|
|
# Create vti6 interface bound to device, passing MTU, check it
|
|
run_cmd ${ns_a} ip link add vti6_a mtu 1300 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1
|
|
mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
if [ ${mtu} -ne 1300 ]; then
|
|
err " vti6 MTU ${mtu} doesn't match configured value 1300"
|
|
fail=1
|
|
fi
|
|
|
|
# Move to another device with different MTU, without passing MTU, check
|
|
# MTU is adjusted
|
|
run_cmd ${ns_a} ip link set vti6_a type vti6 remote ${dummy6_1_prefix}2 local ${dummy6_1_prefix}1
|
|
mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
if [ ${mtu} -ne $((3000 - 40)) ]; then
|
|
err " vti MTU ${mtu} is not dummy MTU 3000 minus IPv6 header length"
|
|
fail=1
|
|
fi
|
|
|
|
# Move it back, passing MTU, check MTU is not overridden
|
|
run_cmd ${ns_a} ip link set vti6_a mtu 1280 type vti6 remote ${dummy6_0_prefix}2 local ${dummy6_0_prefix}1
|
|
mtu="$(link_get_mtu "${ns_a}" vti6_a)"
|
|
if [ ${mtu} -ne 1280 ]; then
|
|
err " vti6 MTU ${mtu} doesn't match configured value 1280"
|
|
fail=1
|
|
fi
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
check_command() {
|
|
cmd=${1}
|
|
|
|
if ! which ${cmd} > /dev/null 2>&1; then
|
|
err " missing required command: '${cmd}'"
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
test_cleanup_vxlanX_exception() {
|
|
outer="${1}"
|
|
encap="vxlan"
|
|
ll_mtu=4000
|
|
|
|
check_command taskset || return 2
|
|
cpu_list=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2)
|
|
|
|
setup namespaces routing ${encap}${outer} || return 2
|
|
trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \
|
|
"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
|
|
|
|
# Create route exception by exceeding link layer MTU
|
|
mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
|
|
mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" veth_B-R1 ${ll_mtu}
|
|
mtu "${ns_r1}" veth_R1-B ${ll_mtu}
|
|
|
|
mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000))
|
|
mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000))
|
|
|
|
# Fill exception cache for multiple CPUs (2)
|
|
# we can always use inner IPv4 for that
|
|
for cpu in ${cpu_list}; do
|
|
run_cmd taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${tunnel4_b_addr}
|
|
done
|
|
|
|
${ns_a} ip link del dev veth_A-R1 &
|
|
iplink_pid=$!
|
|
sleep 1
|
|
if [ "$(cat /proc/${iplink_pid}/cmdline 2>/dev/null | tr -d '\0')" = "iplinkdeldevveth_A-R1" ]; then
|
|
err " can't delete veth device in a timely manner, PMTU dst likely leaked"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
test_cleanup_ipv6_exception() {
|
|
test_cleanup_vxlanX_exception 6
|
|
}
|
|
|
|
test_cleanup_ipv4_exception() {
|
|
test_cleanup_vxlanX_exception 4
|
|
}
|
|
|
|
run_test() {
|
|
(
|
|
tname="$1"
|
|
tdesc="$2"
|
|
|
|
unset IFS
|
|
|
|
if [ "$VERBOSE" = "1" ]; then
|
|
printf "\n##########################################################################\n\n"
|
|
fi
|
|
|
|
eval test_${tname}
|
|
ret=$?
|
|
|
|
if [ $ret -eq 0 ]; then
|
|
printf "TEST: %-60s [ OK ]\n" "${tdesc}"
|
|
elif [ $ret -eq 1 ]; then
|
|
printf "TEST: %-60s [FAIL]\n" "${tdesc}"
|
|
if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
|
|
echo
|
|
echo "Pausing. Hit enter to continue"
|
|
read a
|
|
fi
|
|
err_flush
|
|
exit 1
|
|
elif [ $ret -eq 2 ]; then
|
|
printf "TEST: %-60s [SKIP]\n" "${tdesc}"
|
|
err_flush
|
|
fi
|
|
|
|
return $ret
|
|
)
|
|
ret=$?
|
|
[ $ret -ne 0 ] && exitcode=1
|
|
|
|
return $ret
|
|
}
|
|
|
|
run_test_nh() {
|
|
tname="$1"
|
|
tdesc="$2"
|
|
|
|
USE_NH=yes
|
|
run_test "${tname}" "${tdesc} - nexthop objects"
|
|
USE_NH=no
|
|
}
|
|
|
|
test_list_flush_ipv4_exception() {
|
|
setup namespaces routing || return 2
|
|
trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \
|
|
"${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
|
|
"${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
|
|
|
|
dst_prefix1="${prefix4}.${b_r1}."
|
|
dst2="${prefix4}.${b_r2}.1"
|
|
|
|
# Set up initial MTU values
|
|
mtu "${ns_a}" veth_A-R1 2000
|
|
mtu "${ns_r1}" veth_R1-A 2000
|
|
mtu "${ns_r1}" veth_R1-B 1500
|
|
mtu "${ns_b}" veth_B-R1 1500
|
|
|
|
mtu "${ns_a}" veth_A-R2 2000
|
|
mtu "${ns_r2}" veth_R2-A 2000
|
|
mtu "${ns_r2}" veth_R2-B 1500
|
|
mtu "${ns_b}" veth_B-R2 1500
|
|
|
|
fail=0
|
|
|
|
# Add 100 addresses for veth endpoint on B reached by default A route
|
|
for i in $(seq 100 199); do
|
|
run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1
|
|
done
|
|
|
|
# Create 100 cached route exceptions for path via R1, one via R2. Note
|
|
# that with IPv4 we need to actually cause a route lookup that matches
|
|
# the exception caused by ICMP, in order to actually have a cached
|
|
# route, so we need to ping each destination twice
|
|
for i in $(seq 100 199); do
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst_prefix1}${i}"
|
|
done
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dst2}"
|
|
|
|
if [ "$(${ns_a} ip -oneline route list cache | wc -l)" -ne 101 ]; then
|
|
err " can't list cached exceptions"
|
|
fail=1
|
|
fi
|
|
|
|
run_cmd ${ns_a} ip route flush cache
|
|
pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}1)"
|
|
pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst_prefix}2)"
|
|
if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \
|
|
[ -n "$(${ns_a} ip route list cache)" ]; then
|
|
err " can't flush cached exceptions"
|
|
fail=1
|
|
fi
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
test_list_flush_ipv6_exception() {
|
|
setup namespaces routing || return 2
|
|
trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
|
|
"${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \
|
|
"${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
|
|
"${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
|
|
|
|
dst_prefix1="${prefix6}:${b_r1}::"
|
|
dst2="${prefix6}:${b_r2}::1"
|
|
|
|
# Set up initial MTU values
|
|
mtu "${ns_a}" veth_A-R1 2000
|
|
mtu "${ns_r1}" veth_R1-A 2000
|
|
mtu "${ns_r1}" veth_R1-B 1500
|
|
mtu "${ns_b}" veth_B-R1 1500
|
|
|
|
mtu "${ns_a}" veth_A-R2 2000
|
|
mtu "${ns_r2}" veth_R2-A 2000
|
|
mtu "${ns_r2}" veth_R2-B 1500
|
|
mtu "${ns_b}" veth_B-R2 1500
|
|
|
|
fail=0
|
|
|
|
# Add 100 addresses for veth endpoint on B reached by default A route
|
|
for i in $(seq 100 199); do
|
|
run_cmd ${ns_b} ip addr add "${dst_prefix1}${i}" dev veth_B-R1
|
|
done
|
|
|
|
# Create 100 cached route exceptions for path via R1, one via R2
|
|
for i in $(seq 100 199); do
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst_prefix1}${i}"
|
|
done
|
|
run_cmd ${ns_a} ping -q -M want -i 0.1 -w 1 -s 1800 "${dst2}"
|
|
if [ "$(${ns_a} ip -oneline -6 route list cache | wc -l)" -ne 101 ]; then
|
|
err " can't list cached exceptions"
|
|
fail=1
|
|
fi
|
|
|
|
run_cmd ${ns_a} ip -6 route flush cache
|
|
pmtu1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst_prefix1}100")"
|
|
pmtu2="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst2})"
|
|
if [ -n "${pmtu1}" ] || [ -n "${pmtu2}" ] || \
|
|
[ -n "$(${ns_a} ip -6 route list cache)" ]; then
|
|
err " can't flush cached exceptions"
|
|
fail=1
|
|
fi
|
|
|
|
return ${fail}
|
|
}
|
|
|
|
usage() {
|
|
echo
|
|
echo "$0 [OPTIONS] [TEST]..."
|
|
echo "If no TEST argument is given, all tests will be run."
|
|
echo
|
|
echo "Options"
|
|
echo " --trace: capture traffic to TEST_INTERFACE.pcap"
|
|
echo
|
|
echo "Available tests${tests}"
|
|
exit 1
|
|
}
|
|
|
|
################################################################################
|
|
#
|
|
exitcode=0
|
|
desc=0
|
|
|
|
while getopts :ptv o
|
|
do
|
|
case $o in
|
|
p) PAUSE_ON_FAIL=yes;;
|
|
v) VERBOSE=1;;
|
|
t) if which tcpdump > /dev/null 2>&1; then
|
|
TRACING=1
|
|
else
|
|
echo "=== tcpdump not available, tracing disabled"
|
|
fi
|
|
;;
|
|
*) usage;;
|
|
esac
|
|
done
|
|
shift $(($OPTIND-1))
|
|
|
|
IFS="
|
|
"
|
|
|
|
for arg do
|
|
# Check first that all requested tests are available before running any
|
|
command -v > /dev/null "test_${arg}" || { echo "=== Test ${arg} not found"; usage; }
|
|
done
|
|
|
|
trap cleanup EXIT
|
|
|
|
# start clean
|
|
cleanup
|
|
|
|
HAVE_NH=no
|
|
ip nexthop ls >/dev/null 2>&1
|
|
[ $? -eq 0 ] && HAVE_NH=yes
|
|
|
|
name=""
|
|
desc=""
|
|
rerun_nh=0
|
|
for t in ${tests}; do
|
|
[ "${name}" = "" ] && name="${t}" && continue
|
|
[ "${desc}" = "" ] && desc="${t}" && continue
|
|
|
|
if [ "${HAVE_NH}" = "yes" ]; then
|
|
rerun_nh="${t}"
|
|
fi
|
|
|
|
run_this=1
|
|
for arg do
|
|
[ "${arg}" != "${arg#--*}" ] && continue
|
|
[ "${arg}" = "${name}" ] && run_this=1 && break
|
|
run_this=0
|
|
done
|
|
if [ $run_this -eq 1 ]; then
|
|
run_test "${name}" "${desc}"
|
|
# if test was skipped no need to retry with nexthop objects
|
|
[ $? -eq 2 ] && rerun_nh=0
|
|
|
|
if [ "${rerun_nh}" = "1" ]; then
|
|
run_test_nh "${name}" "${desc}"
|
|
fi
|
|
fi
|
|
name=""
|
|
desc=""
|
|
rerun_nh=0
|
|
done
|
|
|
|
exit ${exitcode}
|