netdev - Re: [PATCH/RFC net-next 0/4] Allow use of rocker ports without bridging

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Date:	Mon, 13 Apr 2015 08:43:16 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Simon Horman <simon.horman@...ronome.com>
Cc:	Jiri Pirko <jiri@...nulli.us>, Netdev <netdev@...r.kernel.org>,
	"Arad, Ronen" <ronen.arad@...el.com>
Subject: Re: [PATCH/RFC net-next 0/4] Allow use of rocker ports without bridging

On Mon, Apr 13, 2015 at 7:59 AM, Scott Feldman <sfeldma@...il.com> wrote:
> On Sun, Apr 12, 2015 at 11:47 PM, Simon Horman
> <simon.horman@...ronome.com> wrote:
>> Hi,
>>
>> this short series attempts to allow rocker ports to be used when they
>> are not attached to a bridge. It attempts to make use of flow entries
>> in a rocker switch where appropriate and otherwise forwards packets up
>> to the kernel for processing.
>
> Hi Simon,
>
> Unbridged ports should be working now with current driver/device.  I
> wonder if you have an older qemu rocker device?  Use master branch of
> https://github.com/scottfeldman/qemu-rocker.git.
>
> My test setup is to IPv4 ping two hosts from two different ports.
> Something like:
>
> sw1:sw1p1:11.0.0.1/24 <----------------> h1:eth1:11.0.0.2/24
> sw1:sw1p2:12.0.0.1/24 <----------------> h2:eth1:12.0.0.2/24
>
> ARP and ping work fine.  What is your test setup?  I haven't spent a
> lot of time on unbridged port testing, since major focus has been on
> offloading bridge L2 and L3.

Ah, I think I know why it's not working for you.  You don't have the
VLAN 8021.q module loaded, do you?  I'm getting these:

[    2.871619] 8021q: 802.1Q VLAN Support v1.8
[    2.871629] 8021q: adding VLAN 0 to HW filter on device sw1p1
[    2.872097] 8021q: adding VLAN 0 to HW filter on device sw1p2

Which calls into the driver ndo_vlan ops and sets up untagged access.

But, dependence on VLAN 802.1q module is wrong I think, and we'll need
your patch (I haven't reviewed it yet, but I'm assuming it's doing
basically what loading what VLAN 802.1q driver forces).

The Spring Cleanup patchset has better setlink/dellink support so
driver can manage VLANs from bridge driver and moves away from
ndo_vlan ops used with 802.1q VLAN driver.  Ronan (Cc:d) has a VLAN
patch that builds on top of my Spring Cleanup patchset  I think the
order of changes will be to get my Spring Cleanup patchset in and then
get yours/Ronan's patches in.  And rocker can get away from using
ndo_vlan ops.

Would you verify that without your patch, and with VLAN 802.1q driver
loaded, unbridged ports are working?

-scott
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