[ofa-general] Re: [Scst-devel] SRP Target Session Hangs

[Vu Pham]

Vladislav Bolkhovitin wrote:
> Sufficool, Stanley wrote:
>> 1) We are running WinIB on Windows 2003 SR2 with the OFED SRP Target. 
>> The windows machines initially connect fine to the target, however 
>> when they are restarted without using the "eject io unit" SCST retains 
>> the SRPT session and subsequent connects to the target fail with 
>> "Cannot start device".
> 
> This looks for me like an SRP target driver problem. Hopefully, Vu 
> (CC'ed) can answer you.


The old {srp connection, scst session} will be terminated 
before the new tuple {srp connection, scst session} being 
created. Please collect some traces on both win initiator 
and srp target (/var/log/messages). I want to see why and 
where it fail.

> 
>> Using most recent WinIB, kernel 2.6.22 IB drivers, and recent SRPT and 
>> SCST.
>>  
>> 2) I have yet to get the WinOF 1.0 or 1.0.1 SRP Initiator to work. Is 
>> there any reason other than my lack of trying harder that this 
>> wouldn't work?
> 
> This is question for Vu as well


Please use the latest srp target driver in ofed-1.3


> 
>> 3) This may not be the forum for this, but how can you terminate a 
>> session using SCST proc commands?
> 
> SCST can't (and shouldn't) do that, because it has no knowledge about 
> how sessions with particular target transport created and destroyed. 
> Sessions management is the target driver's duty. Ask Vu that feature.


Normally {srp connection, scst session} will be destroyed 
upon disconnect reques or new connection request (without 
multi-channels flag) coming from initiator or QP is in error 
condition.

Sometimes we fail to terminate scst session when there are 
outstanding I/Os on scst session which does not match the 
outstanding I/Os on the srp connection. Right after srp 
calls scst_init_cmd_done, it increases the active command 
counter and decreases the counter on on_free_command.

Any idea Vlad?

thanks,
-vu

> 
>> Thanks in advance
>>  
>>
>> *Stanley Sufficool
>> *Systems Analyst I
>> County of San Bernardino
>>
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