selftests: net: Test for the IOAM insertion with IPv6

This test evaluates the IOAM insertion for IPv6 by checking the IOAM data
integrity on the receiver.

The topology is formed by 3 nodes: Alpha (sender), Beta (router in-between)
and Gamma (receiver). An IOAM domain is configured from Alpha to Gamma only,
which means not on the reverse path. When Gamma is the destination, Alpha
adds an IOAM option (Pre-allocated Trace) inside a Hop-by-hop and fills the
trace with its own IOAM data. Beta and Gamma also fill the trace. The IOAM
data integrity is checked on Gamma, by comparing with the pre-defined IOAM
configuration (see below).

    +-------------------+            +-------------------+
    |                   |            |                   |
    |    alpha netns    |            |    gamma netns    |
    |                   |            |                   |
    |  +-------------+  |            |  +-------------+  |
    |  |    veth0    |  |            |  |    veth0    |  |
    |  |  db01::2/64 |  |            |  |  db02::2/64 |  |
    |  +-------------+  |            |  +-------------+  |
    |         .         |            |         .         |
    +-------------------+            +-------------------+
              .                                .
              .                                .
              .                                .
    +----------------------------------------------------+
    |         .                                .         |
    |  +-------------+                  +-------------+  |
    |  |    veth0    |                  |    veth1    |  |
    |  |  db01::1/64 | ................ |  db02::1/64 |  |
    |  +-------------+                  +-------------+  |
    |                                                    |
    |                      beta netns                    |
    |                                                    |
    +--------------------------+-------------------------+

~~~~~~~~~~~~~~~~~~~~~~
| IOAM configuration |
~~~~~~~~~~~~~~~~~~~~~~

Alpha
+-----------------------------------------------------------+
| Type                | Value                               |
+-----------------------------------------------------------+
| Node ID             | 1                                   |
+-----------------------------------------------------------+
| Node Wide ID        | 11111111                            |
+-----------------------------------------------------------+
| Ingress ID          | 0xffff (default value)              |
+-----------------------------------------------------------+
| Ingress Wide ID     | 0xffffffff (default value)          |
+-----------------------------------------------------------+
| Egress ID           | 101                                 |
+-----------------------------------------------------------+
| Egress Wide ID      | 101101                              |
+-----------------------------------------------------------+
| Namespace Data      | 0xdeadbee0                          |
+-----------------------------------------------------------+
| Namespace Wide Data | 0xcafec0caf00dc0de                  |
+-----------------------------------------------------------+
| Schema ID           | 777                                 |
+-----------------------------------------------------------+
| Schema Data         | something that will be 4n-aligned   |
+-----------------------------------------------------------+

Note: When Gamma is the destination, Alpha adds an IOAM Pre-allocated Trace
      option inside a Hop-by-hop, where 164 bytes are pre-allocated for the
      trace, with 123 as the IOAM-Namespace and with 0xfff00200 as the trace
      type (= all available options at this time). As a result, and based on
      IOAM configurations here, only both Alpha and Beta should be capable of
      inserting their IOAM data while Gamma won't have enough space and will
      set the overflow bit.

Beta
+-----------------------------------------------------------+
| Type                | Value                               |
+-----------------------------------------------------------+
| Node ID             | 2                                   |
+-----------------------------------------------------------+
| Node Wide ID        | 22222222                            |
+-----------------------------------------------------------+
| Ingress ID          | 201                                 |
+-----------------------------------------------------------+
| Ingress Wide ID     | 201201                              |
+-----------------------------------------------------------+
| Egress ID           | 202                                 |
+-----------------------------------------------------------+
| Egress Wide ID      | 202202                              |
+-----------------------------------------------------------+
| Namespace Data      | 0xdeadbee1                          |
+-----------------------------------------------------------+
| Namespace Wide Data | 0xcafec0caf11dc0de                  |
+-----------------------------------------------------------+
| Schema ID           | 0xffffff (= None)                   |
+-----------------------------------------------------------+
| Schema Data         |                                     |
+-----------------------------------------------------------+

Gamma
+-----------------------------------------------------------+
| Type                | Value                               |
+-----------------------------------------------------------+
| Node ID             | 3                                   |
+-----------------------------------------------------------+
| Node Wide ID        | 33333333                            |
+-----------------------------------------------------------+
| Ingress ID          | 301                                 |
+-----------------------------------------------------------+
| Ingress Wide ID     | 301301                              |
+-----------------------------------------------------------+
| Egress ID           | 0xffff (default value)              |
+-----------------------------------------------------------+
| Egress Wide ID      | 0xffffffff (default value)          |
+-----------------------------------------------------------+
| Namespace Data      | 0xdeadbee2                          |
+-----------------------------------------------------------+
| Namespace Wide Data | 0xcafec0caf22dc0de                  |
+-----------------------------------------------------------+
| Schema ID           | 0xffffff (= None)                   |
+-----------------------------------------------------------+
| Schema Data         |                                     |
+-----------------------------------------------------------+

Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 297 insertions, 0 deletions

diff --git a/tools/testing/selftests/net/ioam6.sh b/tools/testing/selftests/net/ioam6.sh
new file mode 100644
index 000000000000..bcf15487e584
--- /dev/null
+++ b/tools/testing/selftests/net/ioam6.sh
@@ -0,0 +1,297 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Author: Justin Iurman <justin.iurman@uliege.be>
+#
+# This test evaluates the IOAM insertion for IPv6 by checking the IOAM data
+# integrity on the receiver.
+#
+# The topology is formed by 3 nodes: Alpha (sender), Beta (router in-between)
+# and Gamma (receiver). An IOAM domain is configured from Alpha to Gamma only,
+# which means not on the reverse path. When Gamma is the destination, Alpha
+# adds an IOAM option (Pre-allocated Trace) inside a Hop-by-hop and fills the
+# trace with its own IOAM data. Beta and Gamma also fill the trace. The IOAM
+# data integrity is checked on Gamma, by comparing with the pre-defined IOAM
+# configuration (see below).
+#
+#     +-------------------+            +-------------------+
+#     |                   |            |                   |
+#     |    alpha netns    |            |    gamma netns    |
+#     |                   |            |                   |
+#     |  +-------------+  |            |  +-------------+  |
+#     |  |    veth0    |  |            |  |    veth0    |  |
+#     |  |  db01::2/64 |  |            |  |  db02::2/64 |  |
+#     |  +-------------+  |            |  +-------------+  |
+#     |         .         |            |         .         |
+#     +-------------------+            +-------------------+
+#               .                                .
+#               .                                .
+#               .                                .
+#     +----------------------------------------------------+
+#     |         .                                .         |
+#     |  +-------------+                  +-------------+  |
+#     |  |    veth0    |                  |    veth1    |  |
+#     |  |  db01::1/64 | ................ |  db02::1/64 |  |
+#     |  +-------------+                  +-------------+  |
+#     |                                                    |
+#     |                      beta netns                    |
+#     |                                                    |
+#     +--------------------------+-------------------------+
+#
+#
+# ~~~~~~~~~~~~~~~~~~~~~~
+# | IOAM configuration |
+# ~~~~~~~~~~~~~~~~~~~~~~
+#
+# Alpha
+# +-----------------------------------------------------------+
+# | Type                | Value                               |
+# +-----------------------------------------------------------+
+# | Node ID             | 1                                   |
+# +-----------------------------------------------------------+
+# | Node Wide ID        | 11111111                            |
+# +-----------------------------------------------------------+
+# | Ingress ID          | 0xffff (default value)              |
+# +-----------------------------------------------------------+
+# | Ingress Wide ID     | 0xffffffff (default value)          |
+# +-----------------------------------------------------------+
+# | Egress ID           | 101                                 |
+# +-----------------------------------------------------------+
+# | Egress Wide ID      | 101101                              |
+# +-----------------------------------------------------------+
+# | Namespace Data      | 0xdeadbee0                          |
+# +-----------------------------------------------------------+
+# | Namespace Wide Data | 0xcafec0caf00dc0de                  |
+# +-----------------------------------------------------------+
+# | Schema ID           | 777                                 |
+# +-----------------------------------------------------------+
+# | Schema Data         | something that will be 4n-aligned   |
+# +-----------------------------------------------------------+
+#
+# Note: When Gamma is the destination, Alpha adds an IOAM Pre-allocated Trace
+#       option inside a Hop-by-hop, where 164 bytes are pre-allocated for the
+#       trace, with 123 as the IOAM-Namespace and with 0xfff00200 as the trace
+#       type (= all available options at this time). As a result, and based on
+#       IOAM configurations here, only both Alpha and Beta should be capable of
+#       inserting their IOAM data while Gamma won't have enough space and will
+#       set the overflow bit.
+#
+# Beta
+# +-----------------------------------------------------------+
+# | Type                | Value                               |
+# +-----------------------------------------------------------+
+# | Node ID             | 2                                   |
+# +-----------------------------------------------------------+
+# | Node Wide ID        | 22222222                            |
+# +-----------------------------------------------------------+
+# | Ingress ID          | 201                                 |
+# +-----------------------------------------------------------+
+# | Ingress Wide ID     | 201201                              |
+# +-----------------------------------------------------------+
+# | Egress ID           | 202                                 |
+# +-----------------------------------------------------------+
+# | Egress Wide ID      | 202202                              |
+# +-----------------------------------------------------------+
+# | Namespace Data      | 0xdeadbee1                          |
+# +-----------------------------------------------------------+
+# | Namespace Wide Data | 0xcafec0caf11dc0de                  |
+# +-----------------------------------------------------------+
+# | Schema ID           | 0xffffff (= None)                   |
+# +-----------------------------------------------------------+
+# | Schema Data         |                                     |
+# +-----------------------------------------------------------+
+#
+# Gamma
+# +-----------------------------------------------------------+
+# | Type                | Value                               |
+# +-----------------------------------------------------------+
+# | Node ID             | 3                                   |
+# +-----------------------------------------------------------+
+# | Node Wide ID        | 33333333                            |
+# +-----------------------------------------------------------+
+# | Ingress ID          | 301                                 |
+# +-----------------------------------------------------------+
+# | Ingress Wide ID     | 301301                              |
+# +-----------------------------------------------------------+
+# | Egress ID           | 0xffff (default value)              |
+# +-----------------------------------------------------------+
+# | Egress Wide ID      | 0xffffffff (default value)          |
+# +-----------------------------------------------------------+
+# | Namespace Data      | 0xdeadbee2                          |
+# +-----------------------------------------------------------+
+# | Namespace Wide Data | 0xcafec0caf22dc0de                  |
+# +-----------------------------------------------------------+
+# | Schema ID           | 0xffffff (= None)                   |
+# +-----------------------------------------------------------+
+# | Schema Data         |                                     |
+# +-----------------------------------------------------------+
+
+#===============================================================================
+#
+# WARNING:
+# Do NOT modify the following configuration unless you know what you're doing.
+#
+IOAM_NAMESPACE=123
+IOAM_TRACE_TYPE=0xfff00200
+IOAM_PREALLOC_DATA_SIZE=164
+
+ALPHA=(
+	1					# ID
+	11111111				# Wide ID
+	0xffff					# Ingress ID
+	0xffffffff				# Ingress Wide ID
+	101					# Egress ID
+	101101					# Egress Wide ID
+	0xdeadbee0				# Namespace Data
+	0xcafec0caf00dc0de			# Namespace Wide Data
+	777					# Schema ID (0xffffff = None)
+	"something that will be 4n-aligned"	# Schema Data
+)
+
+BETA=(
+	2
+	22222222
+	201
+	201201
+	202
+	202202
+	0xdeadbee1
+	0xcafec0caf11dc0de
+	0xffffff
+	""
+)
+
+GAMMA=(
+	3
+	33333333
+	301
+	301301
+	0xffff
+	0xffffffff
+	0xdeadbee2
+	0xcafec0caf22dc0de
+	0xffffff
+	""
+)
+#===============================================================================
+
+if [ "$(id -u)" -ne 0 ]; then
+  echo "SKIP: Need root privileges"
+  exit 1
+fi
+
+if [ ! -x "$(command -v ip)" ]; then
+  echo "SKIP: Could not run test without ip tool"
+  exit 1
+fi
+
+ip ioam &>/dev/null
+if [ $? = 1 ]; then
+  echo "SKIP: ip tool must include IOAM"
+  exit 1
+fi
+
+if [ ! -e /proc/sys/net/ipv6/ioam6_id ]; then
+  echo "SKIP: ioam6 sysctls do not exist"
+  exit 1
+fi
+
+cleanup()
+{
+  ip link del ioam-veth-alpha 2>/dev/null || true
+  ip link del ioam-veth-gamma 2>/dev/null || true
+
+  ip netns del ioam-node-alpha || true
+  ip netns del ioam-node-beta || true
+  ip netns del ioam-node-gamma || true
+}
+
+setup()
+{
+  ip netns add ioam-node-alpha
+  ip netns add ioam-node-beta
+  ip netns add ioam-node-gamma
+
+  ip link add name ioam-veth-alpha type veth peer name ioam-veth-betaL
+  ip link add name ioam-veth-betaR type veth peer name ioam-veth-gamma
+
+  ip link set ioam-veth-alpha netns ioam-node-alpha
+  ip link set ioam-veth-betaL netns ioam-node-beta
+  ip link set ioam-veth-betaR netns ioam-node-beta
+  ip link set ioam-veth-gamma netns ioam-node-gamma
+
+  ip -netns ioam-node-alpha link set ioam-veth-alpha name veth0
+  ip -netns ioam-node-beta link set ioam-veth-betaL name veth0
+  ip -netns ioam-node-beta link set ioam-veth-betaR name veth1
+  ip -netns ioam-node-gamma link set ioam-veth-gamma name veth0
+
+  ip -netns ioam-node-alpha addr add db01::2/64 dev veth0
+  ip -netns ioam-node-alpha link set veth0 up
+  ip -netns ioam-node-alpha link set lo up
+  ip -netns ioam-node-alpha route add default via db01::1
+
+  ip -netns ioam-node-beta addr add db01::1/64 dev veth0
+  ip -netns ioam-node-beta addr add db02::1/64 dev veth1
+  ip -netns ioam-node-beta link set veth0 up
+  ip -netns ioam-node-beta link set veth1 up
+  ip -netns ioam-node-beta link set lo up
+
+  ip -netns ioam-node-gamma addr add db02::2/64 dev veth0
+  ip -netns ioam-node-gamma link set veth0 up
+  ip -netns ioam-node-gamma link set lo up
+  ip -netns ioam-node-gamma route add default via db02::1
+
+  # - IOAM config -
+  ip netns exec ioam-node-alpha sysctl -wq net.ipv6.ioam6_id=${ALPHA[0]}
+  ip netns exec ioam-node-alpha sysctl -wq net.ipv6.ioam6_id_wide=${ALPHA[1]}
+  ip netns exec ioam-node-alpha sysctl -wq net.ipv6.conf.veth0.ioam6_id=${ALPHA[4]}
+  ip netns exec ioam-node-alpha sysctl -wq net.ipv6.conf.veth0.ioam6_id_wide=${ALPHA[5]}
+  ip -netns ioam-node-alpha ioam namespace add ${IOAM_NAMESPACE} data ${ALPHA[6]} wide ${ALPHA[7]}
+  ip -netns ioam-node-alpha ioam schema add ${ALPHA[8]} "${ALPHA[9]}"
+  ip -netns ioam-node-alpha ioam namespace set ${IOAM_NAMESPACE} schema ${ALPHA[8]}
+  ip -netns ioam-node-alpha route add db02::/64 encap ioam6 trace type ${IOAM_TRACE_TYPE:0:-2} ns ${IOAM_NAMESPACE} size ${IOAM_PREALLOC_DATA_SIZE} via db01::1 dev veth0
+
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.all.forwarding=1
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.ioam6_id=${BETA[0]}
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.ioam6_id_wide=${BETA[1]}
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.veth0.ioam6_enabled=1
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.veth0.ioam6_id=${BETA[2]}
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.veth0.ioam6_id_wide=${BETA[3]}
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.veth1.ioam6_id=${BETA[4]}
+  ip netns exec ioam-node-beta sysctl -wq net.ipv6.conf.veth1.ioam6_id_wide=${BETA[5]}
+  ip -netns ioam-node-beta ioam namespace add ${IOAM_NAMESPACE} data ${BETA[6]} wide ${BETA[7]}
+
+  ip netns exec ioam-node-gamma sysctl -wq net.ipv6.ioam6_id=${GAMMA[0]}
+  ip netns exec ioam-node-gamma sysctl -wq net.ipv6.ioam6_id_wide=${GAMMA[1]}
+  ip netns exec ioam-node-gamma sysctl -wq net.ipv6.conf.veth0.ioam6_enabled=1
+  ip netns exec ioam-node-gamma sysctl -wq net.ipv6.conf.veth0.ioam6_id=${GAMMA[2]}
+  ip netns exec ioam-node-gamma sysctl -wq net.ipv6.conf.veth0.ioam6_id_wide=${GAMMA[3]}
+  ip -netns ioam-node-gamma ioam namespace add ${IOAM_NAMESPACE} data ${GAMMA[6]} wide ${GAMMA[7]}
+}
+
+run()
+{
+  echo -n "IOAM test... "
+
+  ip netns exec ioam-node-alpha ping6 -c 5 -W 1 db02::2 &>/dev/null
+  if [ $? != 0 ]; then
+    echo "FAILED"
+    cleanup &>/dev/null
+    exit 0
+  fi
+
+  ip netns exec ioam-node-gamma ./ioam6_parser veth0 2 ${IOAM_NAMESPACE} ${IOAM_TRACE_TYPE} 64 ${ALPHA[0]} ${ALPHA[1]} ${ALPHA[2]} ${ALPHA[3]} ${ALPHA[4]} ${ALPHA[5]} ${ALPHA[6]} ${ALPHA[7]} ${ALPHA[8]} "${ALPHA[9]}" 63 ${BETA[0]} ${BETA[1]} ${BETA[2]} ${BETA[3]} ${BETA[4]} ${BETA[5]} ${BETA[6]} ${BETA[7]} ${BETA[8]} &
+
+  local spid=$!
+  sleep 0.1
+
+  ip netns exec ioam-node-alpha ping6 -c 5 -W 1 db02::2 &>/dev/null
+
+  wait $spid
+  [ $? = 0 ] && echo "PASSED" || echo "FAILED"
+}
+
+cleanup &>/dev/null
+setup
+run
+cleanup &>/dev/null