[stgt] [PATCH 0/4] iser, new implementation

FUJITA Tomonori fujita.tomonori at lab.ntt.co.jp
Thu Oct 14 15:07:54 CEST 2010

On Wed, 13 Oct 2010 15:31:08 +0200
Alexander Nezhinsky <alexandern at Voltaire.COM> wrote:

> + added sending NOP-IN. While not mandatory in iscsi, it is quite important 
> in iSER (specifically in IB case). When a connection is broken, IB does not 
> automatically generate error events if there is no operation to
> fail.

I plan to implement this for tcp too.

> Thus it is quite possible to have stale connections which will never clear,
> if the target has nothing to send (obviously, nothing will be received
> from now on). Sending NOP-IN periodically guarantees that such connections
> will be removed, as the send op will fail with an unrecoverable error.
> Sending NOP-IN is enabled by default. To disable, invoke tgtd with 
> "--iser nop=off". 

The feature should be supported for tcp. I think that configuration
per target is good enough.

> Uses a timer: do we need a centralized timer management in tgtd? 

usr/work.c doesn't work for you? isns code uses it.

When you finish bidi, I'll merge this.

btw, please use a different subject per mail next time.

Thanks a lot!

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