Re: NOP-Out reply to Unsolicited NOP-IN with invalid TTT.

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On Tue, 2014-05-27 at 10:52 +0530, Arshad Hussain wrote:
> Hi Nab,
> 
> Thanks for the explanation.  Yes the initiator is throwing incorrect
> TTT. Should not this be handled by the Target?. If this is the valid
> error, then I would be happy to provide in the patch.
> 

It's not a error because the initiator sending ITT=<some value> +
TTT=0xffffffff is a valid NOP-OUT request soliciting a NOP-IN response
from the target.

> Couple of question regarding NOP-In to help me understand the behavior
> better. (a) When does target (LIO) decide to send out unsolicited NOP-In
> assuming there will be corresponding NOP-Out (Valid TTT).

A NOP-IN with a valid ITT=0xffffffff + TTT=<some value> is generated on
a per connection basis every 'nopin_timeout' seconds.

> (b) When target send sout NOP-In without wanting to receive a
> corresponding NOP-Out.?
> 

Never.  If no NOP-OUT with a TTT matching the solicited NOPIN TTT is
received after 'nopin_response_timeout' seconds, the connection will be
forced into reinstatement.

--nab

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