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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