linux-kernel - Re: [PATCH iproute2-next 0/3] Extend locked port feature with FDB locked flag (MAC-Auth/MAB)

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Message-ID: <86y21hc28z.fsf@gmail.com>
Date:   Thu, 10 Mar 2022 15:26:36 +0100
From:   Hans Schultz <schultz.hans@...il.com>
To:     Nikolay Aleksandrov <razor@...ckwall.org>,
        Hans Schultz <schultz.hans@...il.com>, davem@...emloft.net,
        kuba@...nel.org
Cc:     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>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Ido Schimmel <idosch@...dia.com>, linux-kernel@...r.kernel.org,
        bridge@...ts.linux-foundation.org
Subject: Re: [PATCH iproute2-next 0/3] Extend locked port feature with FDB
 locked flag (MAC-Auth/MAB)

On tor, mar 10, 2022 at 16:18, Nikolay Aleksandrov <razor@...ckwall.org> wrote:
> On 10/03/2022 15:36, Hans Schultz wrote:
>> This patch set extends the locked port feature for devices
>> that are behind a locked port, but do not have the ability to
>> authorize themselves as a supplicant using IEEE 802.1X.
>> Such devices can be printers, meters or anything related to
>> fixed installations. Instead of 802.1X authorization, devices
>> can get access based on their MAC addresses being whitelisted.
>> 
>> For an authorization daemon to detect that a device is trying
>> to get access through a locked port, the bridge will add the
>> MAC address of the device to the FDB with a locked flag to it.
>> Thus the authorization daemon can catch the FDB add event and
>> check if the MAC address is in the whitelist and if so replace
>> the FDB entry without the locked flag enabled, and thus open
>> the port for the device.
>> 
>> This feature is known as MAC-Auth or MAC Authentication Bypass
>> (MAB) in Cisco terminology, where the full MAB concept involves
>> additional Cisco infrastructure for authorization. There is no
>> real authentication process, as the MAC address of the device
>> is the only input the authorization daemon, in the general
>> case, has to base the decision if to unlock the port or not.
>> 
>> With this patch set, an implementation of the offloaded case is
>> supplied for the mv88e6xxx driver. When a packet ingresses on
>> a locked port, an ATU miss violation event will occur. When
>> handling such ATU miss violation interrupts, the MAC address of
>> the device is added to the FDB with a zero destination port
>> vector (DPV) and the MAC address is communicated through the
>> switchdev layer to the bridge, so that a FDB entry with the
>> locked flag enabled can be added.
>> 
>> Hans Schultz (3):
>>    net: bridge: add fdb flag to extent locked port feature
>>    net: switchdev: add support for offloading of fdb locked flag
>>    net: dsa: mv88e6xxx: mac-auth/MAB implementation
>> 
>>   drivers/net/dsa/mv88e6xxx/Makefile            |  1 +
>>   drivers/net/dsa/mv88e6xxx/chip.c              | 10 +--
>>   drivers/net/dsa/mv88e6xxx/chip.h              |  5 ++
>>   drivers/net/dsa/mv88e6xxx/global1.h           |  1 +
>>   drivers/net/dsa/mv88e6xxx/global1_atu.c       | 29 +++++++-
>>   .../net/dsa/mv88e6xxx/mv88e6xxx_switchdev.c   | 67 +++++++++++++++++++
>>   .../net/dsa/mv88e6xxx/mv88e6xxx_switchdev.h   | 20 ++++++
>>   drivers/net/dsa/mv88e6xxx/port.c              | 11 +++
>>   drivers/net/dsa/mv88e6xxx/port.h              |  1 +
>>   include/net/switchdev.h                       |  3 +-
>>   include/uapi/linux/neighbour.h                |  1 +
>>   net/bridge/br.c                               |  3 +-
>>   net/bridge/br_fdb.c                           | 13 +++-
>>   net/bridge/br_input.c                         | 11 ++-
>>   net/bridge/br_private.h                       |  5 +-
>>   15 files changed, 167 insertions(+), 14 deletions(-)
>>   create mode 100644 drivers/net/dsa/mv88e6xxx/mv88e6xxx_switchdev.c
>>   create mode 100644 drivers/net/dsa/mv88e6xxx/mv88e6xxx_switchdev.h
>> 
>
> This doesn't look like an iproute2 patch-set. I think you've messed the target
> in the subject.

Sorry, complete bummer!
I have resent it with the correct header.