The device stores flood records in a singly linked list where each
record stores up to three IPv4 addresses of remote VTEPs. The test
verifies that packets are correctly flooded in various cases such as
deletion of a record in the middle of the list.
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
---
.../drivers/net/mlxsw/vxlan_flooding.sh | 309 ++++++++++++++++++
1 file changed, 309 insertions(+)
create mode 100755 tools/testing/selftests/drivers/net/mlxsw/vxlan_flooding.sh
diff --git a/tools/testing/selftests/drivers/net/mlxsw/vxlan_flooding.sh b/tools/testing/selftests/drivers/net/mlxsw/vxlan_flooding.sh
new file mode 100755
index 000000000000..fedcb7b35af9
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/vxlan_flooding.sh
@@ -0,0 +1,309 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test VxLAN flooding. The device stores flood records in a singly linked list
+# where each record stores up to three IPv4 addresses of remote VTEPs. The test
+# verifies that packets are correctly flooded in various cases such as deletion
+# of a record in the middle of the list.
+#
+# +--------------------+
+# | H1 (vrf) |
+# | + $h1 |
+# | | 203.0.113.1/24|
+# +----|---------------+
+# |
+# +----|----------------------------------------------------------------------+
+# | SW | |
+# | +--|--------------------------------------------------------------------+ |
+# | | + $swp1 BR0 (802.1d) | |
+# | | | |
+# | | + vxlan0 (vxlan) | |
+# | | local 198.51.100.1 | |
+# | | remote 198.51.100.{2..13} | |
+# | | id 10 dstport 4789 | |
+# | +-----------------------------------------------------------------------+ |
+# | |
+# | 198.51.100.0/24 via 192.0.2.2 |
+# | |
+# | + $rp1 |
+# | | 192.0.2.1/24 |
+# +----|----------------------------------------------------------------------+
+# |
+# +----|--------------------------------------------------------+
+# | | R2 (vrf) |
+# | + $rp2 |
+# | 192.0.2.2/24 |
+# | |
+# +-------------------------------------------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="flooding_test"
+NUM_NETIFS=4
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+
+h1_create()
+{
+ simple_if_init $h1 203.0.113.1/24
+}
+
+h1_destroy()
+{
+ simple_if_fini $h1 203.0.113.1/24
+}
+
+switch_create()
+{
+ # Make sure the bridge uses the MAC address of the local port and
+ # not that of the VxLAN's device
+ ip link add dev br0 type bridge mcast_snooping 0
+ ip link set dev br0 address $(mac_get $swp1)
+
+ ip link add name vxlan0 type vxlan id 10 nolearning noudpcsum \
+ ttl 20 tos inherit local 198.51.100.1 dstport 4789
+
+ ip address add 198.51.100.1/32 dev lo
+
+ ip link set dev $swp1 master br0
+ ip link set dev vxlan0 master br0
+
+ ip link set dev br0 up
+ ip link set dev $swp1 up
+ ip link set dev vxlan0 up
+}
+
+switch_destroy()
+{
+ ip link set dev vxlan0 down
+ ip link set dev $swp1 down
+ ip link set dev br0 down
+
+ ip link set dev vxlan0 nomaster
+ ip link set dev $swp1 nomaster
+
+ ip address del 198.51.100.1/32 dev lo
+
+ ip link del dev vxlan0
+
+ ip link del dev br0
+}
+
+router1_create()
+{
+ # This router is in the default VRF, where the VxLAN device is
+ # performing the L3 lookup
+ ip link set dev $rp1 up
+ ip address add 192.0.2.1/24 dev $rp1
+ ip route add 198.51.100.0/24 via 192.0.2.2
+}
+
+router1_destroy()
+{
+ ip route del 198.51.100.0/24 via 192.0.2.2
+ ip address del 192.0.2.1/24 dev $rp1
+ ip link set dev $rp1 down
+}
+
+router2_create()
+{
+ # This router is not in the default VRF, so use simple_if_init()
+ simple_if_init $rp2 192.0.2.2/24
+}
+
+router2_destroy()
+{
+ simple_if_fini $rp2 192.0.2.2/24
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ swp1=${NETIFS[p2]}
+
+ rp1=${NETIFS[p3]}
+ rp2=${NETIFS[p4]}
+
+ vrf_prepare
+
+ h1_create
+
+ switch_create
+
+ router1_create
+ router2_create
+
+ forwarding_enable
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ forwarding_restore
+
+ router2_destroy
+ router1_destroy
+
+ switch_destroy
+
+ h1_destroy
+
+ vrf_cleanup
+}
+
+flooding_remotes_add()
+{
+ local num_remotes=$1
+ local lsb
+ local i
+
+ for i in $(eval echo {1..$num_remotes}); do
+ lsb=$((i + 1))
+
+ bridge fdb append 00:00:00:00:00:00 dev vxlan0 self \
+ dst 198.51.100.$lsb
+ done
+}
+
+flooding_filters_add()
+{
+ local num_remotes=$1
+ local lsb
+ local i
+
+ tc qdisc add dev $rp2 clsact
+
+ for i in $(eval echo {1..$num_remotes}); do
+ lsb=$((i + 1))
+
+ tc filter add dev $rp2 ingress protocol ip pref $i handle $i \
+ flower ip_proto udp dst_ip 198.51.100.$lsb \
+ dst_port 4789 skip_sw action drop
+ done
+}
+
+flooding_filters_del()
+{
+ local num_remotes=$1
+ local i
+
+ for i in $(eval echo {1..$num_remotes}); do
+ tc filter del dev $rp2 ingress protocol ip pref $i \
+ handle $i flower
+ done
+
+ tc qdisc del dev $rp2 clsact
+}
+
+flooding_check_packets()
+{
+ local packets=("$@")
+ local num_remotes=${#packets[@]}
+ local i
+
+ for i in $(eval echo {1..$num_remotes}); do
+ tc_check_packets "dev $rp2 ingress" $i ${packets[i - 1]}
+ check_err $? "remote $i - did not get expected number of packets"
+ done
+}
+
+flooding_test()
+{
+ # Use 12 remote VTEPs that will be stored in 4 records. The array
+ # 'packets' will store how many packets are expected to be received
+ # by each remote VTEP at each stage of the test
+ declare -a packets=(1 1 1 1 1 1 1 1 1 1 1 1)
+ local num_remotes=12
+
+ RET=0
+
+ # Add FDB entries for remote VTEPs and corresponding tc filters on the
+ # ingress of the nexthop router. These filters will count how many
+ # packets were flooded to each remote VTEP
+ flooding_remotes_add $num_remotes
+ flooding_filters_add $num_remotes
+
+ # Send one packet and make sure it is flooded to all the remote VTEPs
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 1 packet"
+
+ # Delete the third record which corresponds to VTEPs with LSB 8..10
+ # and check that packet is flooded correctly when we remove a record
+ # from the middle of the list
+ RET=0
+
+ packets=(2 2 2 2 2 2 1 1 1 2 2 2)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.8
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.9
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.10
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 2 packets"
+
+ # Delete the first record and make sure the packet is flooded correctly
+ RET=0
+
+ packets=(2 2 2 3 3 3 1 1 1 3 3 3)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.2
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.3
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.4
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 3 packets"
+
+ # Delete the last record and make sure the packet is flooded correctly
+ RET=0
+
+ packets=(2 2 2 4 4 4 1 1 1 3 3 3)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.11
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.12
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.13
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 4 packets"
+
+ # Delete the last record, one entry at a time and make sure single
+ # entries are correctly removed
+ RET=0
+
+ packets=(2 2 2 4 5 5 1 1 1 3 3 3)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.5
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 5 packets"
+
+ RET=0
+
+ packets=(2 2 2 4 5 6 1 1 1 3 3 3)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.6
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 6 packets"
+
+ RET=0
+
+ packets=(2 2 2 4 5 6 1 1 1 3 3 3)
+ bridge fdb del 00:00:00:00:00:00 dev vxlan0 self dst 198.51.100.7
+
+ $MZ $h1 -q -p 64 -b de:ad:be:ef:13:37 -t ip -c 1
+ flooding_check_packets "${packets[@]}"
+ log_test "flood after 7 packets"
+
+ flooding_filters_del $num_remotes
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
--
2.19.1
