linux-kernel - RE: [PATCH v4 10/27] IB/Verbs: Reform cm related part in IB-core cma/ucm

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Date:	Thu, 16 Apr 2015 17:30:34 +0000
From:	"Hefty, Sean" <sean.hefty@...el.com>
To:	Tom Talpey <tom@...pey.com>,
	Michael Wang <yun.wang@...fitbricks.com>,
	"Hal Rosenstock" <hal@....mellanox.co.il>
CC:	Roland Dreier <roland@...nel.org>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tom Tucker <tom@...ngridcomputing.com>,
	"Steve Wise" <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	infinipath <infinipath@...el.com>,
	"Eli Cohen" <eli@...lanox.com>,
	"Latif, Faisal" <faisal.latif@...el.com>,
	"Jack Morgenstein" <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	"Weiny, Ira" <ira.weiny@...el.com>,
	"Jason Gunthorpe" <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: RE: [PATCH v4 10/27] IB/Verbs: Reform cm related part in IB-core
 cma/ucm

> > To be confirmed:
> > 				PORT ASSIGNED
> > 	rdma_init_qp_attr	Y
> > 	rdma_destroy_id		unknown
> > 	cma_listen_on_dev	N
> > 	cma_bind_loopback	N

Bind loopback will attach to a port, but the id does not have on entry.

> > 	rdma_listen		N
> 
> Why "N"? rdma_listen() can be constrained to a single port, right?
> And even if wildcarded, it needs to act on multiple ports, which is
> to say, it will fail only if no ports are eligible.

Rdma listen should be unknown.  The id may be assigned to a port.  It depends on the source address.

> > 	rdma_connect		Y
> > 	rdma_accept		Y
> > 	rdma_reject		Y
> > 	rdma_disconnect		Y
> > 	ib_ucm_add_one		N

Others look correct.

Btw, thanks for your work on this.  I know this is becoming a much bigger change than you originally intended.  :)

- Sean