Re: [PATCH net-next 12/18] IB/mlx5: Add kernel offload flow-tag

On Tue, Jun 21, 2016 at 6:04 AM, Saeed Mahameed
[off-list ref] wrote:

Alexei , I don't understand your concern.
We already have a full/complete working dpdk bypass solution in
userspace nothing extra is required from the kernel.

We just want to see this traffic and any other rdma traffic in tcpdump
or other standard sniffing tools.

Anyway we brainstormed this internally today and we don't like the
"skb->protocol = 0xffff" solution,

One solution would be to setup a special netdev used only for sniffers
(No IP address on it)

-> Only changes would happen in the driver, to set skb->dev to this
'debug' device.