netdev - Re: [PATCH net-next mlxsw v2 0/2] bridge: FDB: Notify about removal of non-user-added entries

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Date:   Thu, 03 May 2018 13:47:02 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     petrm@...lanox.com
Cc:     netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
        jiri@...lanox.com, idosch@...lanox.com, ivecera@...hat.com,
        stephen@...workplumber.org, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com
Subject: Re: [PATCH net-next mlxsw v2 0/2] bridge: FDB: Notify about
 removal of non-user-added entries

From: Petr Machata <petrm@...lanox.com>
Date: Thu, 03 May 2018 14:43:40 +0200

> Device drivers may generally need to keep in sync with bridge's FDB. In
> particular, for its offload of tc mirror action where the mirrored-to
> device is a gretap device, mlxsw needs to listen to a number of events,
> FDB events among the others. SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE would be
> a natural notification in that case.
> 
> However, for removal of FDB entries added due to device activity (as
> opposed to explicit addition through "bridge fdb add" or similar), there
> are no notifications.
> 
> Thus in patch #1, add the "added_by_user" field to switchdev
> notifications sent for FDB activity. Adapt drivers to ignore activity on
> non-user-added entries, to maintain the current behavior. Specifically
> in case of mlxsw, allow mlxsw_sp_span_respin() call for any and all FDB
> updates.
> 
> In patch #2, change the bridge driver to actually emit notifications for
> these FDB entries. Take care not to send notification for bridge
> updates that itself originate in SWITCHDEV_FDB_*_TO_BRIDGE events.
> 
> Changes from v1 to v2:
> - Instead of introducing a new variant of fdb_delete(), add a new
>   parameter to the existing function.
> - Name the parameter swdev_notify, not notify.

Series applied, thank you.