Re: [PATCH RFC net-next 07/10] net: dsa: mv88e6xxx: Track bridge mdb objects

[Vladimir Oltean]

On Mon, Apr 01, 2024 at 08:11:06PM -0400, Joseph Huang wrote:
> Keep track of bridge mdb objects in the driver.
> 
> Similar to the previous patch, since the driver doesn't get explicit
> notifications about mdb group creation or destruction, just create
> the mdb group when the first port joins the group via
> mv88e6xxx_port_mdb_add(), and destroys the group when the last port left
> the group via mv88e6xxx_port_mdb_del().
> 
> Use the group's L2 address together with the VLAN ID as the key to the list.
> Port membership is again stored in a bitmask.
> 
> Signed-off-by: Joseph Huang <Joseph.Huang@xxxxxxxxxx>
> ---

Can you comment on the feasibility/infeasibility of Tobias' proposal of:
"The bridge could just provide some MDB iterator to save us from having
to cache all the configured groups."?
https://lore.kernel.org/netdev/87sg31n04a.fsf@xxxxxxxxxxxxxx/

What is done here will have to be scaled to many drivers - potentially
all existing DSA ones, as far as I'm aware.