Re: [PATCH net-next v3 5/5] selftests: forwarding: tests of locked port feature

[Hans Schultz]

On sön, feb 20, 2022 at 11:12, Ido Schimmel <idosch@xxxxxxxxxx> wrote:
> On Fri, Feb 18, 2022 at 04:51:48PM +0100, Hans Schultz wrote:
>> These tests check that the basic locked port feature works, so that no 'host'
>> can communicate (ping) through a locked port unless the MAC address of the
>> 'host' interface is in the forwarding database of the bridge.
>
> Thanks for adding the test. I assume this was tested with both mv88e6xxx
> and veth?
>
Yes, both cases have been tested. :-)

>> 
>> Signed-off-by: Hans Schultz <schultz.hans+netdev@xxxxxxxxx>
>> ---
>>  .../testing/selftests/net/forwarding/Makefile |   1 +
>>  .../net/forwarding/bridge_locked_port.sh      | 174 ++++++++++++++++++
>>  tools/testing/selftests/net/forwarding/lib.sh |  16 ++
>>  3 files changed, 191 insertions(+)
>>  create mode 100755 tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> 
>> diff --git a/tools/testing/selftests/net/forwarding/Makefile b/tools/testing/selftests/net/forwarding/Makefile
>> index 72ee644d47bf..8fa97ae9af9e 100644
>> --- a/tools/testing/selftests/net/forwarding/Makefile
>> +++ b/tools/testing/selftests/net/forwarding/Makefile
>> @@ -1,6 +1,7 @@
>>  # SPDX-License-Identifier: GPL-2.0+ OR MIT
>>  
>>  TEST_PROGS = bridge_igmp.sh \
>> +	bridge_locked_port.sh \
>>  	bridge_port_isolation.sh \
>>  	bridge_sticky_fdb.sh \
>>  	bridge_vlan_aware.sh \
>> diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> new file mode 100755
>> index 000000000000..d2805441b325
>> --- /dev/null
>> +++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> @@ -0,0 +1,174 @@
>> +#!/bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +
>> +ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan"
>> +NUM_NETIFS=4
>> +CHECK_TC="no"
>> +source lib.sh
>> +
>> +h1_create()
>> +{
>> +	simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
>> +	vrf_create "vrf-vlan-h1"
>> +        ip link set dev vrf-vlan-h1 up
>> +        vlan_create $h1 100 vrf-vlan-h1 192.0.3.1/24 2001:db8:3::1/64
>
> In the tests we try to use only addresses specified in RFC 5737. Instead
> of 192.0.3.0/24 I suggest 198.51.100.0/24
>
>> +}
>> +
>> +h1_destroy()
>> +{
>> +	vlan_destroy $h1 100
>> +	simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64
>> +}
>> +
>> +h2_create()
>> +{
>> +	simple_if_init $h2 192.0.2.2/24 2001:db8:1::2/64
>> +	vrf_create "vrf-vlan-h2"
>> +	ip link set dev vrf-vlan-h2 up
>> +	vlan_create $h2 100 vrf-vlan-h2 192.0.3.2/24 2001:db8:3::2/64
>> +}
>> +
>> +h2_destroy()
>> +{
>> +	vlan_destroy $h2 100
>> +	simple_if_fini $h2 192.0.2.2/24 2001:db8:1::2/64
>> +}
>> +
>> +switch_create()
>> +{
>> +	ip link add dev br0 type bridge vlan_filtering 1
>> +
>> +	ip link set dev $swp1 master br0
>> +	ip link set dev $swp2 master br0
>> +
>> +	ip link set dev br0 up
>> +	ip link set dev $swp1 up
>> +	ip link set dev $swp2 up
>> +
>> +	bridge link set dev $swp1 learning off
>> +}
>> +
>> +switch_destroy()
>> +{
>> +	ip link set dev $swp2 down
>> +	ip link set dev $swp1 down
>> +
>> +	ip link del dev br0
>> +}
>> +
>> +setup_prepare()
>> +{
>> +	h1=${NETIFS[p1]}
>> +	swp1=${NETIFS[p2]}
>> +
>> +	swp2=${NETIFS[p3]}
>> +	h2=${NETIFS[p4]}
>> +
>> +	vrf_prepare
>> +
>> +	h1_create
>> +	h2_create
>> +
>> +	switch_create
>> +}
>> +
>> +cleanup()
>> +{
>> +	pre_cleanup
>> +
>> +	switch_destroy
>> +
>> +	h2_destroy
>> +	h1_destroy
>> +
>> +	vrf_cleanup
>> +}
>> +
>> +ifaddr()
>
> We already have mac_get()
>
>> +{
>> +	ip -br link show dev "$1" | awk '{ print($3); }'
>> +}
>> +
>> +locked_port_ipv4()
>> +{
>> +	RET=0
>> +
>> +	check_locked_port_support || return 0
>> +
>> +	ping_do $h1 192.0.2.2
>> +	check_err $? "Ping didn't work when it should have"
>
> Better to use unique error messages that pinpoint the problem:
>
> "Ping did not work before locking port"
>
>> +
>> +	bridge link set dev $swp1 locked on
>> +
>> +	ping_do $h1 192.0.2.2
>> +	check_fail $? "Ping worked when it should not have"
>
> "Ping worked after locking port, but before adding a FDB entry"
>
>> +
>> +	bridge fdb add `ifaddr $h1` dev $swp1 master static
>
> bridge fdb add $(mac_get $h1) dev $swp1 master static
>
>> +
>> +	ping_do $h1 192.0.2.2
>> +	check_err $? "Ping didn't work when it should have"
>
> "Ping did not work after locking port and adding a FDB entry"
>
>> +
>> +	bridge link set dev $swp1 locked off
>> +	bridge fdb del `ifaddr $h1` dev $swp1 master static
>
> I suggest to add another test case here to see that ping works after
> unlocking the port and removing the FDB entry
>
> Same comments on the other test cases
>
>> +	log_test "Locked port ipv4"
>> +}
>> +
>> +locked_port_vlan()
>> +{
>> +	RET=0
>> +
>> +	check_locked_port_support || return 0
>> +	check_vlan_filtering_support || return 0
>
> Why this check is needed? The bridge was already created with
> "vlan_filtering 1"
>
>> +
>> +	bridge vlan add vid 100 dev $swp1 tagged
>
> Not familiar with "tagged" keyword. I believe iproute2 ignores it.
> Please drop it
>
>> +	bridge vlan add vid 100 dev $swp2 tagged
>> +
>> +	ping_do $h1.100 192.0.3.2
>> +	check_err $? "Ping didn't work when it should have"
>> +
>> +	bridge link set dev $swp1 locked on
>> +	ping_do $h1.100 192.0.3.2
>> +	check_fail $? "Ping worked when it should not have"
>> +
>> +	bridge fdb add `ifaddr $h1` dev $swp1 vlan 100 master static
>> +
>> +	ping_do $h1.100 192.0.3.2
>> +	check_err $? "Ping didn't work when it should have"
>> +
>> +	bridge link set dev $swp1 locked off
>> +	bridge vlan del vid 100 dev $swp1
>> +	bridge vlan del vid 100 dev $swp2
>> +	bridge fdb del `ifaddr $h1` dev $swp1 vlan 100 master static
>> +	log_test "Locked port vlan"
>> +}
>> +
>> +locked_port_ipv6()
>> +{
>> +	RET=0
>> +	check_locked_port_support || return 0
>> +
>> +	ping6_do $h1 2001:db8:1::2
>> +	check_err $? "Ping6 didn't work when it should have"
>> +
>> +	bridge link set dev $swp1 locked on
>> +
>> +	ping6_do $h1 2001:db8:1::2
>> +	check_fail $? "Ping worked when it should not have"
>> +
>> +	bridge fdb add `ifaddr $h1` dev $swp1 master static
>> +	ping6_do $h1 2001:db8:1::2
>> +	check_err $? "Ping didn't work when it should have"
>> +
>> +	bridge link set dev $swp1 locked off
>> +	bridge fdb del `ifaddr $h1` dev $swp1 master static
>> +	log_test "Locked port ipv6"
>> +}
>> +
>> +trap cleanup EXIT
>> +
>> +setup_prepare
>> +setup_wait
>> +
>> +tests_run
>> +
>> +exit $EXIT_STATUS
>> diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
>> index 7da783d6f453..9ded90f17ead 100644
>> --- a/tools/testing/selftests/net/forwarding/lib.sh
>> +++ b/tools/testing/selftests/net/forwarding/lib.sh
>> @@ -125,6 +125,22 @@ check_ethtool_lanes_support()
>>  	fi
>>  }
>>  
>> +check_locked_port_support()
>> +{
>> +        if ! bridge -d link show | grep -q " locked"; then
>> +                echo "SKIP: iproute2 too old; Locked port feature not supported."
>> +                return $ksft_skip
>> +        fi
>> +}
>> +
>> +check_vlan_filtering_support()
>> +{
>> +	if ! bridge -d vlan show | grep -q "state forwarding"; then
>> +		echo "SKIP: vlan filtering not supported."
>> +		return $ksft_skip
>> +	fi
>> +}
>> +
>>  if [[ "$(id -u)" -ne 0 ]]; then
>>  	echo "SKIP: need root privileges"
>>  	exit $ksft_skip
>> -- 
>> 2.30.2
>>