Re: [PATCH for-next V2 05/11] IB/core: Add rdma_network_type to wc

[Moni Shoua]

On Mon, Dec 7, 2015 at 8:34 AM, Jason Gunthorpe
<jguntho...@obsidianresearch.com> wrote:
> On Mon, Dec 07, 2015 at 08:15:40AM +0200, Moni Shoua wrote:
>
>> What you have though is the sgid taken from the GRH that is scattered
>> to the first 40/20 bytes of the receive WQE.  This is not enough to
>> determine the network type.
>
> It is enough to discover the sgid index which will tell you the type.
but how? all you have in hand is the sgid which can appear several
times in the GID table in different indices.
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