Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 94d302de authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

selftests: mlxsw: Add a test for 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.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Reviewed-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 99c9b084

tools/testing/selftests/drivers/net/mlxsw/vxlan_flooding.sh

0 → 100755
+309 −0
Original line number Diff line number Diff line 
#!/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