Re: [PATCH v3 net-next 3/3] net: dsa: mv88e6xxx: mac-auth/MAB implementation

[Vladimir Oltean <olteanv@gmail.com>]

On Fri, Jan 06, 2023 at 05:05:29PM +0100, Hans J. Schultz wrote:
> This implementation for the Marvell mv88e6xxx chip series is based on
> handling ATU miss violations occurring when packets ingress on a port
> that is locked with learning on. This will trigger a
> SWITCHDEV_FDB_ADD_TO_BRIDGE event, which will result in the bridge module
> adding a locked FDB entry. This bridge FDB entry will not age out as
> it has the extern_learn flag set.
> 
> Userspace daemons can listen to these events and either accept or deny
> access for the host, by either replacing the locked FDB entry with a
> simple entry or leave the locked entry.
> 
> If the host MAC address is already present on another port, a ATU
> member violation will occur, but to no real effect, and the packet will
> be dropped in hardware. Statistics on these violations can be shown with
> the command and example output of interest:
> 
> ethtool -S ethX
> NIC statistics:
> ...
>      atu_member_violation: 5
>      atu_miss_violation: 23
> ...
> 
> Where ethX is the interface of the MAB enabled port.
> 
> Furthermore, as added vlan interfaces where the vid is not added to the
> VTU will cause ATU miss violations reporting the FID as
> MV88E6XXX_FID_STANDALONE, we need to check and skip the miss violations
> handling in this case.
> 
> Signed-off-by: Hans J. Schultz <netdev@kapio-technology.com>
> ---

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Reviewed-by: Vladimir Oltean <olteanv@gmail.com>


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