Re: [PATCH 5/7] scsi: target: iscsit/isert: stop/wait on cmds during conn close

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On 12/10/22 7:38 PM, Mike Christie wrote:
> On 12/10/22 12:48 PM, Mike Christie wrote:
>>
>> When we do iscsit iscsit_release_commands_from_conn we are:
>>
>> 1. Waiting on commands in the backend and LIO core.
>> 2. Doing the last put on commands that have had queue_status called but
>> we haven't freed the cmd because they haven't been ackd.
>>
>> Are we hitting an issue with #2? We need a proper bug and analysis or we are
>> just guessing and am going to mess up.
>>
>> For example, for isert is the bug you are worried about that we have a missing
>> isert_send_done/isert_completion_put call because we disconnected before the
>> send callbacks could be done or because the ib layer won't call isert_send_done
>> when it detects a failure?
> I tested this and it's actually opposite and broken for a different reason :)
> 

Hey Dimitry, it looks like you were right :) After I fixed the use after free
with isert, I was able to test the case where there are TMRs running with
isert and the connection closes and that was broken in multiple places.
The updated patches end up merging the isert and iscsit command cleanup
and wait code in the end like you requested.





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