Commit 04913912 authored by Ido Schimmel's avatar Ido Schimmel Committed by Jakub Kicinski
Browse files

selftests: forwarding: Add MDB dump test cases 



The kernel maintains three markers for the MDB dump:

1. The last bridge device from which the MDB was dumped.
2. The last MDB entry from which the MDB was dumped.
3. The last port-group entry that was dumped.

Add test cases for large scale MDB dump to make sure that all the
configured entries are dumped and that the markers are used correctly.

Specifically, create 2 bridges with 32 ports and add 256 MDB entries in
which all the ports are member of. Test that each bridge reports 8192
(256 * 32) permanent entries. Do that with IPv4, IPv6 and L2 MDB
entries.

On my system, MDB dump of the above is contained in about 50 netlink
messages.

Example output:

 # ./bridge_mdb.sh
 [...]
 INFO: # Large scale dump tests
 TEST: IPv4 large scale dump tests                                   [ OK ]
 TEST: IPv6 large scale dump tests                                   [ OK ]
 TEST: L2 large scale dump tests                                     [ OK ]
 [...]

Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Reviewed-by: default avatarPetr Machata <petrm@nvidia.com>
Acked-by: default avatarNikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 170afa71

tools/testing/selftests/net/forwarding/bridge_mdb.sh

+99 −0
Original line number Diff line number Diff line
@@ -742,10 +742,109 @@ cfg_test_port() 
	cfg_test_port_l2

}



ipv4_grps_get()

{

	local max_grps=$1; shift

	local i



	for i in $(seq 0 $((max_grps - 1))); do

		echo "239.1.1.$i"

	done

}



ipv6_grps_get()

{

	local max_grps=$1; shift

	local i



	for i in $(seq 0 $((max_grps - 1))); do

		echo "ff0e::$(printf %x $i)"

	done

}



l2_grps_get()

{

	local max_grps=$1; shift

	local i



	for i in $(seq 0 $((max_grps - 1))); do

		echo "01:00:00:00:00:$(printf %02x $i)"

	done

}



cfg_test_dump_common()

{

	local name=$1; shift

	local fn=$1; shift

	local max_bridges=2

	local max_grps=256

	local max_ports=32

	local num_entries

	local batch_file

	local grp

	local i j



	RET=0



	# Create net devices.

	for i in $(seq 1 $max_bridges); do

		ip link add name br-test${i} up type bridge vlan_filtering 1 \

			mcast_snooping 1

		for j in $(seq 1 $max_ports); do

			ip link add name br-test${i}-du${j} up \

				master br-test${i} type dummy

		done

	done



	# Create batch file with MDB entries.

	batch_file=$(mktemp)

	for i in $(seq 1 $max_bridges); do

		for j in $(seq 1 $max_ports); do

			for grp in $($fn $max_grps); do

				echo "mdb add dev br-test${i} \

					port br-test${i}-du${j} grp $grp \

					permanent vid 1" >> $batch_file

			done

		done

	done



	# Program the batch file and check for expected number of entries.

	bridge -b $batch_file

	for i in $(seq 1 $max_bridges); do

		num_entries=$(bridge mdb show dev br-test${i} | \

			grep "permanent" | wc -l)

		[[ $num_entries -eq $((max_grps * max_ports)) ]]

		check_err $? "Wrong number of entries in br-test${i}"

	done



	# Cleanup.

	rm $batch_file

	for i in $(seq 1 $max_bridges); do

		ip link del dev br-test${i}

		for j in $(seq $max_ports); do

			ip link del dev br-test${i}-du${j}

		done

	done



	log_test "$name large scale dump tests"

}



# Check large scale dump.

cfg_test_dump()

{

	echo

	log_info "# Large scale dump tests"



	cfg_test_dump_common "IPv4" ipv4_grps_get

	cfg_test_dump_common "IPv6" ipv6_grps_get

	cfg_test_dump_common "L2" l2_grps_get

}



cfg_test()

{

	cfg_test_host

	cfg_test_port

	cfg_test_dump

}



__fwd_test_host_ip()