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Message-ID: <CAE4R7bA43Jg5e+DSySvG4X2ka0CXEk9K6eVv5fdN37EcLBoF_A@mail.gmail.com>
Date:	Thu, 28 May 2015 22:02:57 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Cc:	Netdev <netdev@...r.kernel.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Florian Fainelli <f.fainelli@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Jerome Oufella <jerome.oufella@...oirfairelinux.com>,
	Chris Healy <cphealy@...il.com>, Jiri Pirko <jiri@...nulli.us>
Subject: Re: [RFC 0/3] DSA and Marvell 88E6352 802.1q support

On Thu, May 28, 2015 at 2:37 PM, Vivien Didelot
<vivien.didelot@...oirfairelinux.com> wrote:
> This RFC is based on v4.1-rc3.
>
> It is meant to get a glance to the commits responsible to implement the
> necessary NDOs between DSA and the Marvell 88E6352 switch driver.
>
> With this support, I am able to create VLANs with (un)tagged ports, setting
> their default VID, from a bridge.
>
> To create a bridge containing all switch ports, with a VLAN ID 400, swp2 and
> swp3 untagged (pvid), and swp4 tagged, the userspace commands look like this:
>
>     ip link add name br0 type bridge
>     [...]
>     ip link set dev swp2 up master br0
>     [...]
>     bridge vlan add vid 400 pvid untagged dev swp2
>     bridge vlan add vid 400 pvid untagged dev swp3
>     bridge vlan add vid 400 dev swp4
>     [...]
>     ip link add link br0 name br0.400 type vlan id 400
>     [...]
>     bridge vlan add dev br0 vid 400 self
>
> The code is currently being rebased to the latest net-next/master.
>
> Seems like the way to go now is through switchdev attr getter/setter...

Indeed, for dsa_slave you should be able to port this to switchdev and
set your ndo_bridge_setlink/dellink handlers to
switchdev_port_bridge_setlink/dellink.  (And also implement the
switchdev ops for vlans).

If you use switchdev_port_bridge_setlink/dellink, you shouldn't need
to implement ndo_vlan_rx_add_vid/ndo_vlan_rx_kill_vid at all.  The
setlink/dellink callbacks will give the same info (and more, e.g.
pvid, untagged flags) and you'll automatically get support for stacked
drivers, for example if you bonded swp2/3 and then included that bond
in your vlan bridge.  Your commands will be slightly modified: when
adding the vid to the port, specify master and self:

bridge vlan add vid 400 dev swp4 master self

-scott
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