Re: RDMA/CM and multiple QPs

[Tom Talpey <tom-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>]

On 9/6/2015 11:15 AM, Bart Van Assche wrote:
> On 09/06/15 00:50, Christoph Hellwig wrote:
>> Note that the SRP driver already in tree is a good example for this,
>> although it doesn't use RDMA/CM and thus already operates on a
>> per-ib_device level.
>
> The challenges with regard to adding RDMA/CM support to the SRP
> initiator and target drivers are:
> - IANA has not yet assigned a port number to the SRP protocol (see e.g.
>
> http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml).
>

IANA doesn't do this automatically. Has anyone made the request?

You might want to think through why it needs a dedicated port number
though. iSER reuses the iSCSI port, by negotiating RDMA during login.

> - The login request (struct srp_login_req) is too large for the RDMA/CM.
>    A format for the login parameters for the RDMA/CM has not yet been
>    standardized.

Are you suggesting that RDMA/CM perform the login? That seems
like a layering issue.

Tom.

>
> Bart.
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