netdev - Re: [PATCH 08/11] IB/cma: Add net_dev and private data checks to RDMA CM

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Date:	Mon, 15 Jun 2015 11:08:37 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Haggai Eran <haggaie@...lanox.com>
Cc:	Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, Liran Liss <liranl@...lanox.com>,
	Guy Shapiro <guysh@...lanox.com>,
	Shachar Raindel <raindel@...lanox.com>,
	Yotam Kenneth <yotamke@...lanox.com>
Subject: Re: [PATCH 08/11] IB/cma: Add net_dev and private data checks to
 RDMA CM

On Mon, Jun 15, 2015 at 11:47:13AM +0300, Haggai Eran wrote:
> Instead of relying on a the ib_cm module to check an incoming CM request's
> private data header, add these checks to the RDMA CM module. This allows a
> following patch to to clean up the ib_cm interface and remove the code that
> looks into the private headers. It will also allow supporting namespaces in
> RDMA CM by making these checks namespace aware later on.

I was expecting one of these patches to flow the net_device from here:

> +static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
> +					  const struct cma_req_info *req)
> +{

Down through cma_req_handler and cma_new_conn_id so that we get rid of
the cma_translate_addr on the ingress side.

Having the ingress side use one ingress net_device for all processing
seems very important to me...

Jason
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