netdev - Re: [PATCH net-next 00/12] switchdev: Convert switchdev_port_obj

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Message-ID: <wihpnuwbmh4.fsf@dev-r-vrt-156.mtr.labs.mlnx>
Date:   Fri, 23 Nov 2018 01:40:23 +0000
From:   Petr Machata <petrm@...lanox.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "ruxandra.radulescu@....com" <ruxandra.radulescu@....com>,
        "ioana.ciornei@....com" <ioana.ciornei@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "ivecera@...hat.com" <ivecera@...hat.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "vivien.didelot@...oirfairelinux.com" 
        <vivien.didelot@...oirfairelinux.com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>
Subject: Re: [PATCH net-next 00/12] switchdev: Convert
 switchdev_port_obj_{add,del}() to notifiers

Petr Machata <petrm@...lanox.com> writes:

> An offloading driver may need to have access to switchdev events on
> ports that aren't directly under its control. An example is a VXLAN port
> attached to a bridge offloaded by a driver. The driver needs to know
> about VLANs configured on the VXLAN device. However the VXLAN device
> isn't stashed between the bridge and a front-panel-port device (such as
> is the case e.g. for LAG devices), so the usual switchdev ops don't
> reach the driver.

mlxsw will use these notifications to offload VXLAN devices attached to
a VLAN-aware bridge. The patches are available here should anyone wish
to take a look:

        https://github.com/idosch/linux/commits/vxlan

Thanks,
Petr