linux-kernel - Re: [PATCH v2 net] net: bridge: switchdev: don't notify FDB entries with "master dynamic"

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Date:   Thu, 20 Apr 2023 09:23:12 +0300
From:   Ido Schimmel <idosch@...dia.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        "Hans J. Schultz" <netdev@...io-technology.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Ivan Vecera <ivecera@...hat.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        bridge@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net] net: bridge: switchdev: don't notify FDB entries
 with "master dynamic"

On Tue, Apr 18, 2023 at 06:59:02PM +0300, Vladimir Oltean wrote:
> There is a structural problem in switchdev, where the flag bits in
> struct switchdev_notifier_fdb_info (added_by_user, is_local etc) only
> represent a simplified / denatured view of what's in struct
> net_bridge_fdb_entry :: flags (BR_FDB_ADDED_BY_USER, BR_FDB_LOCAL etc).
> Each time we want to pass more information about struct
> net_bridge_fdb_entry :: flags to struct switchdev_notifier_fdb_info
> (here, BR_FDB_STATIC), we find that FDB entries were already notified to
> switchdev with no regard to this flag, and thus, switchdev drivers had
> no indication whether the notified entries were static or not.

[...]

> Fixes: 6b26b51b1d13 ("net: bridge: Add support for notifying devices about FDB add/del")
> Link: https://lore.kernel.org/netdev/20230327115206.jk5q5l753aoelwus@skbuf/
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>

Reviewed-by: Ido Schimmel <idosch@...dia.com>
Tested-by: Ido Schimmel <idosch@...dia.com>