linux-kernel - RE: [PATCH 4/5] nvmet-rdma: add a NVMe over Fabrics RDMA target driver

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Date:	Tue, 14 Jun 2016 11:10:34 -0500
From:	"Steve Wise" <swise@...ngridcomputing.com>
To:	"'Sagi Grimberg'" <sagi@...htbits.io>,
	"'Christoph Hellwig'" <hch@....de>, <axboe@...nel.dk>,
	<keith.busch@...el.com>, <sean.hefty@...el.com>
Cc:	<linux-nvme@...ts.infradead.org>, <linux-block@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	"'Armen Baloyan'" <armenx.baloyan@...el.com>,
	"'Jay Freyensee'" <james.p.freyensee@...el.com>,
	"'Ming Lin'" <ming.l@....samsung.com>, <linux-rdma@...r.kernel.org>
Subject: RE: [PATCH 4/5] nvmet-rdma: add a NVMe over Fabrics RDMA target driver

> 
> The above nvmet cm event handler, nvmet_rdma_cm_handler(), calls
> nvmet_rdma_queue_connect() for CONNECT_REQUEST events, which calls
> nvmet_rdma_alloc_queue (), which, if it encounters a failure (like creating
> the qp), calls nvmet_rdma_cm_reject () which calls rdma_reject().  The
> non-zero error, however, gets returned back here and this function returns
> the error to the RDMA_CM which will also reject the connection as well as
> destroy the cm_id.  So there are two rejects happening, I think.  Either
> nvmet should reject and destroy the cm_id, or it should do neither and
> return non-zero to the RDMA_CM to reject/destroy.
> 
> Steve.
> 

Hey Sean, 

Am I correct here?  IE: Is it ok for the rdma application to rdma_reject() and
rmda_destroy_id() the CONNECT_REQUEST cm_id _inside_ its event handler as long
as it returns 0? 

Thanks,

Steve.