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Date: Fri, 27 May 2022 11:07:50 +0200
From: Hans Schultz <schultz.hans@...il.com>
To: Ido Schimmel <idosch@...sch.org>,
Hans Schultz <schultz.hans@...il.com>
Cc: davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>, Jiri Pirko <jiri@...nulli.us>,
Ivan Vecera <ivecera@...hat.com>,
Roopa Prabhu <roopa@...dia.com>,
Nikolay Aleksandrov <razor@...ckwall.org>,
Shuah Khan <shuah@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Ido Schimmel <idosch@...dia.com>, linux-kernel@...r.kernel.org,
bridge@...ts.linux-foundation.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH V3 net-next 4/4] selftests: forwarding: add test of
MAC-Auth Bypass to locked port tests
On tor, maj 26, 2022 at 17:27, Ido Schimmel <idosch@...sch.org> wrote:
> On Tue, May 24, 2022 at 05:21:44PM +0200, Hans Schultz wrote:
>> Verify that the MAC-Auth mechanism works by adding a FDB entry with the
>> locked flag set. denying access until the FDB entry is replaced with a
>> FDB entry without the locked flag set.
>>
>> Signed-off-by: Hans Schultz <schultz.hans+netdev@...il.com>
>> ---
>> .../net/forwarding/bridge_locked_port.sh | 42 ++++++++++++++++---
>> 1 file changed, 36 insertions(+), 6 deletions(-)
>>
>> diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> index 5b02b6b60ce7..50b9048d044a 100755
>> --- a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> +++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
>> @@ -1,7 +1,7 @@
>> #!/bin/bash
>> # SPDX-License-Identifier: GPL-2.0
>>
>> -ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan"
>> +ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan locked_port_mab"
>> NUM_NETIFS=4
>> CHECK_TC="no"
>> source lib.sh
>> @@ -94,13 +94,13 @@ locked_port_ipv4()
>> ping_do $h1 192.0.2.2
>> check_fail $? "Ping worked after locking port, but before adding FDB entry"
>>
>> - bridge fdb add `mac_get $h1` dev $swp1 master static
>> + bridge fdb replace `mac_get $h1` dev $swp1 master static
>>
>> ping_do $h1 192.0.2.2
>> check_err $? "Ping did not work after locking port and adding FDB entry"
>>
>> bridge link set dev $swp1 locked off
>> - bridge fdb del `mac_get $h1` dev $swp1 master static
>> + bridge fdb del `mac_get $h1` dev $swp1 master
>>
>> ping_do $h1 192.0.2.2
>> check_err $? "Ping did not work after unlocking port and removing FDB entry."
>> @@ -124,13 +124,13 @@ locked_port_vlan()
>> ping_do $h1.100 198.51.100.2
>> check_fail $? "Ping through vlan worked after locking port, but before adding FDB entry"
>>
>> - bridge fdb add `mac_get $h1` dev $swp1 vlan 100 master static
>> + bridge fdb replace `mac_get $h1` dev $swp1 master static
>>
>> ping_do $h1.100 198.51.100.2
>> check_err $? "Ping through vlan did not work after locking port and adding FDB entry"
>>
>> bridge link set dev $swp1 locked off
>> - bridge fdb del `mac_get $h1` dev $swp1 vlan 100 master static
>> + bridge fdb del `mac_get $h1` dev $swp1 vlan 100 master
>>
>> ping_do $h1.100 198.51.100.2
>> check_err $? "Ping through vlan did not work after unlocking port and removing FDB entry"
>> @@ -153,7 +153,8 @@ locked_port_ipv6()
>> ping6_do $h1 2001:db8:1::2
>> check_fail $? "Ping6 worked after locking port, but before adding FDB entry"
>>
>> - bridge fdb add `mac_get $h1` dev $swp1 master static
>> + bridge fdb replace `mac_get $h1` dev $swp1 master static
>> +
>> ping6_do $h1 2001:db8:1::2
>> check_err $? "Ping6 did not work after locking port and adding FDB entry"
>>
>> @@ -166,6 +167,35 @@ locked_port_ipv6()
>> log_test "Locked port ipv6"
>> }
>
> Why did you change s/add/replace/? Also, from the subject and commit
> message I understand the patch is about adding a new test, not changing
> existing ones.
>
Sorry, I might have lost a bit track of the kernel selftests, as for
internal reasons there has been a pause in the work. I will remove the
changes to the previous tests, and I hope it will be fine.
>>
>> +locked_port_mab()
>> +{
>> + RET=0
>> + check_locked_port_support || return 0
>> +
>> + ping_do $h1 192.0.2.2
>> + check_err $? "MAB: Ping did not work before locking port"
>> +
>> + bridge link set dev $swp1 locked on
>> + bridge link set dev $swp1 learning on
>> +
>> + bridge fdb del `mac_get $h1` dev $swp1 master
>
> Why the delete is needed? Aren't you getting errors on trying to delete
> a non-existing entry? In previous test cases learning is disabled and it
> seems the FDB entry is cleaned up.
>
I guess you are right.
>> +
>> + ping_do $h1 192.0.2.2
>> + check_fail $? "MAB: Ping worked on locked port without FDB entry"
>> +
>> + bridge fdb show | grep `mac_get $h1` | grep -q "locked"
>> + check_err $? "MAB: No locked fdb entry after ping on locked port"
>> +
>> + bridge fdb replace `mac_get $h1` dev $swp1 master static
>> +
>> + ping_do $h1 192.0.2.2
>> + check_err $? "MAB: Ping did not work with fdb entry without locked flag"
>> +
>> + bridge fdb del `mac_get $h1` dev $swp1 master
>
> bridge link set dev $swp1 learning off
>
noted.
>> + bridge link set dev $swp1 locked off
>> +
>> + log_test "Locked port MAB"
>> +}
>> trap cleanup EXIT
>>
>> setup_prepare
>> --
>> 2.30.2
>>
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