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Date: Wed, 17 Aug 2022 17:28:27 +0200
From: Petr Machata <petrm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: Ido Schimmel <idosch@...dia.com>, Amit Cohen <amcohen@...dia.com>,
"Shuah Khan" <shuah@...nel.org>, Petr Machata <petrm@...dia.com>,
<mlxsw@...dia.com>
Subject: [PATCH net-next 3/4] selftests: mlxsw: Add ingress RIF configuration test for VXLAN
From: Amit Cohen <amcohen@...dia.com>
Before layer 2 forwarding, the device classifies an incoming packet to a
FID. After classification, the FID is known, but also all the attributes of
the FID, such as the router interface (RIF) via which a packet that needs
to be routed will ingress the router block.
For VXLAN decapsulation, the FID classification is done according to the
VNI. When a RIF is added on top of a FID, the existing VNI->FID mapping
should be updated by the software with the new RIF. In addition, when a new
mapping is added for FID which already has a RIF, the correct RIF should
be used for it.
Add a test to verify that packets can be routed after decapsulation which
is done after VNI->FID classification, regardless of the order of the
configuration.
# ./ingress_rif_conf_vxlan.sh
TEST: Add RIF for existing VNI->FID mapping [ OK ]
TEST: Add VNI->FID mapping for FID with a RIF [ OK ]
Signed-off-by: Amit Cohen <amcohen@...dia.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
Signed-off-by: Petr Machata <petrm@...dia.com>
---
.../net/mlxsw/ingress_rif_conf_vxlan.sh | 311 ++++++++++++++++++
1 file changed, 311 insertions(+)
create mode 100755 tools/testing/selftests/drivers/net/mlxsw/ingress_rif_conf_vxlan.sh
diff --git a/tools/testing/selftests/drivers/net/mlxsw/ingress_rif_conf_vxlan.sh b/tools/testing/selftests/drivers/net/mlxsw/ingress_rif_conf_vxlan.sh
new file mode 100755
index 000000000000..90450216a10d
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/ingress_rif_conf_vxlan.sh
@@ -0,0 +1,311 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# Test routing after VXLAN decapsulation and verify that the order of
+# configuration does not impact switch behavior. Verify that RIF is added
+# correctly for existing mapping and that new mapping uses the correct RIF.
+
+# +---------------------------+
+# | H1 |
+# | + $h1 |
+# | | 192.0.2.1/28 |
+# +----|----------------------+
+# |
+# +----|----------------------------------------------------------------------+
+# | SW | |
+# | +--|--------------------------------------------------------------------+ |
+# | | + $swp1 br1 | |
+# | | vid 10 pvid untagged | |
+# | | | |
+# | | | |
+# | | + vx4001 | |
+# | | local 192.0.2.17 | |
+# | | remote 192.0.2.18 | |
+# | | id 104001 | |
+# | | dstport $VXPORT | |
+# | | vid 4001 pvid untagged | |
+# | | | |
+# | +----------------------------------+------------------------------------+ |
+# | | |
+# | +----------------------------------|------------------------------------+ |
+# | | | | |
+# | | +-------------------------------+---------------------------------+ | |
+# | | | | | |
+# | | + vlan10 vlan4001 + | |
+# | | 192.0.2.2/28 | |
+# | | | |
+# | | vrf-green | |
+# | +-----------------------------------------------------------------------+ |
+# | |
+# | + $rp1 +lo |
+# | | 198.51.100.1/24 192.0.2.17/32 |
+# +----|----------------------------------------------------------------------+
+# |
+# +----|--------------------------------------------------------+
+# | | v$rp2 |
+# | + $rp2 |
+# | 198.51.100.2/24 |
+# | |
+# +-------------------------------------------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+ vni_fid_map_rif
+ rif_vni_fid_map
+"
+
+NUM_NETIFS=4
+source $lib_dir/lib.sh
+source $lib_dir/tc_common.sh
+source $lib_dir/devlink_lib.sh
+
+: ${VXPORT:=4789}
+export VXPORT
+
+h1_create()
+{
+ simple_if_init $h1 192.0.2.1/28
+}
+
+h1_destroy()
+{
+ simple_if_fini $h1 192.0.2.1/28
+}
+
+switch_create()
+{
+ ip link add name br1 type bridge vlan_filtering 1 vlan_default_pvid 0 \
+ mcast_snooping 0
+ # Make sure the bridge uses the MAC address of the local port and not
+ # that of the VxLAN's device.
+ ip link set dev br1 address $(mac_get $swp1)
+ ip link set dev br1 up
+
+ ip link set dev $rp1 up
+ ip address add dev $rp1 198.51.100.1/24
+
+ ip link set dev $swp1 master br1
+ ip link set dev $swp1 up
+ bridge vlan add vid 10 dev $swp1 pvid untagged
+
+ tc qdisc add dev $swp1 clsact
+
+ ip link add name vx4001 type vxlan id 104001 \
+ local 192.0.2.17 dstport $VXPORT \
+ nolearning noudpcsum tos inherit ttl 100
+ ip link set dev vx4001 up
+
+ ip link set dev vx4001 master br1
+
+ ip address add 192.0.2.17/32 dev lo
+
+ # Create SVIs.
+ vrf_create "vrf-green"
+ ip link set dev vrf-green up
+
+ ip link add link br1 name vlan10 up master vrf-green type vlan id 10
+
+ # Replace neighbor to avoid 1 packet which is forwarded in software due
+ # to "unresolved neigh".
+ ip neigh replace dev vlan10 192.0.2.1 lladdr $(mac_get $h1)
+
+ ip address add 192.0.2.2/28 dev vlan10
+
+ bridge vlan add vid 10 dev br1 self
+ bridge vlan add vid 4001 dev br1 self
+
+ sysctl_set net.ipv4.conf.all.rp_filter 0
+}
+
+switch_destroy()
+{
+ sysctl_restore net.ipv4.conf.all.rp_filter
+
+ bridge vlan del vid 4001 dev br1 self
+ bridge vlan del vid 10 dev br1 self
+
+ ip link del dev vlan10
+
+ vrf_destroy "vrf-green"
+
+ ip address del 192.0.2.17/32 dev lo
+
+ tc qdisc del dev $swp1 clsact
+
+ bridge vlan del vid 10 dev $swp1
+ ip link set dev $swp1 down
+ ip link set dev $swp1 nomaster
+
+ ip link set dev vx4001 nomaster
+
+ ip link set dev vx4001 down
+ ip link del dev vx4001
+
+ ip address del dev $rp1 198.51.100.1/24
+ ip link set dev $rp1 down
+
+ ip link set dev br1 down
+ ip link del dev br1
+}
+
+vrp2_create()
+{
+ simple_if_init $rp2 198.51.100.2/24
+
+ ip route add 192.0.2.17/32 vrf v$rp2 nexthop via 198.51.100.1
+}
+
+vrp2_destroy()
+{
+ ip route del 192.0.2.17/32 vrf v$rp2 nexthop via 198.51.100.1
+
+ simple_if_fini $rp2 198.51.100.2/24
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ swp1=${NETIFS[p2]}
+
+ rp1=${NETIFS[p3]}
+ rp2=${NETIFS[p4]}
+
+ vrf_prepare
+ forwarding_enable
+
+ h1_create
+ switch_create
+
+ vrp2_create
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ vrp2_destroy
+
+ switch_destroy
+ h1_destroy
+
+ forwarding_restore
+ vrf_cleanup
+}
+
+payload_get()
+{
+ local dest_mac=$(mac_get vlan4001)
+ local src_mac=$(mac_get $rp1)
+
+ p=$(:
+ )"08:"$( : VXLAN flags
+ )"00:00:00:"$( : VXLAN reserved
+ )"01:96:41:"$( : VXLAN VNI : 104001
+ )"00:"$( : VXLAN reserved
+ )"$dest_mac:"$( : ETH daddr
+ )"$src_mac:"$( : ETH saddr
+ )"08:00:"$( : ETH type
+ )"45:"$( : IP version + IHL
+ )"00:"$( : IP TOS
+ )"00:54:"$( : IP total length
+ )"3f:49:"$( : IP identification
+ )"00:00:"$( : IP flags + frag off
+ )"3f:"$( : IP TTL
+ )"01:"$( : IP proto
+ )"50:21:"$( : IP header csum
+ )"c6:33:64:0a:"$( : IP saddr: 198.51.100.10
+ )"c0:00:02:01:"$( : IP daddr: 192.0.2.1
+ )
+ echo $p
+}
+
+vlan_rif_add()
+{
+ rifs_occ_t0=$(devlink_resource_occ_get rifs)
+
+ ip link add link br1 name vlan4001 up master vrf-green \
+ type vlan id 4001
+
+ rifs_occ_t1=$(devlink_resource_occ_get rifs)
+ expected_rifs=$((rifs_occ_t0 + 1))
+
+ [[ $expected_rifs -eq $rifs_occ_t1 ]]
+ check_err $? "Expected $expected_rifs RIFs, $rifs_occ_t1 are used"
+}
+
+vlan_rif_del()
+{
+ ip link del dev vlan4001
+}
+
+vni_fid_map_rif()
+{
+ local rp1_mac=$(mac_get $rp1)
+
+ RET=0
+
+ # First add VNI->FID mapping to the FID of VLAN 4001
+ bridge vlan add vid 4001 dev vx4001 pvid untagged
+
+ # Add a RIF to the FID with VNI->FID mapping
+ vlan_rif_add
+
+ tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+ flower skip_sw dst_ip 192.0.2.1 action pass
+
+ payload=$(payload_get)
+ ip vrf exec v$rp2 $MZ $rp2 -c 10 -d 1msec -b $rp1_mac \
+ -B 192.0.2.17 -A 192.0.2.18 \
+ -t udp sp=12345,dp=$VXPORT,p=$payload -q
+
+ tc_check_at_least_x_packets "dev $swp1 egress" 101 10
+ check_err $? "Packets were not routed in hardware"
+
+ log_test "Add RIF for existing VNI->FID mapping"
+
+ tc filter del dev $swp1 egress
+
+ bridge vlan del vid 4001 dev vx4001 pvid untagged
+ vlan_rif_del
+}
+
+rif_vni_fid_map()
+{
+ local rp1_mac=$(mac_get $rp1)
+
+ RET=0
+
+ # First add a RIF to the FID of VLAN 4001
+ vlan_rif_add
+
+ # Add VNI->FID mapping to FID with a RIF
+ bridge vlan add vid 4001 dev vx4001 pvid untagged
+
+ tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
+ flower skip_sw dst_ip 192.0.2.1 action pass
+
+ payload=$(payload_get)
+ ip vrf exec v$rp2 $MZ $rp2 -c 10 -d 1msec -b $rp1_mac \
+ -B 192.0.2.17 -A 192.0.2.18 \
+ -t udp sp=12345,dp=$VXPORT,p=$payload -q
+
+ tc_check_at_least_x_packets "dev $swp1 egress" 101 10
+ check_err $? "Packets were not routed in hardware"
+
+ log_test "Add VNI->FID mapping for FID with a RIF"
+
+ tc filter del dev $swp1 egress
+
+ bridge vlan del vid 4001 dev vx4001 pvid untagged
+ vlan_rif_del
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
--
2.35.3
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