Re: [PATCH v2 3/8] qla2xxx: delay plogi/prli ack until existing sessions are deleted

[Hannes Reinecke <hare@suse.de>]

On 07/14/2015 10:00 PM, Himanshu Madhani wrote:
> From: Alexei Potashnik <alexei@purestorage.com>
> 
> - keep qla_tgt_sess object on the session list until it's freed
> 
> - modify use of sess->deleted flag to differentiate delayed
>   session deletion that can be cancelled from irreversible one:
>   QLA_SESS_DELETION_PENDING vs QLA_SESS_DELETION_IN_PROGRESS
> 
> - during IN_PROGRESS deletion all newly arrived commands and TMRs will
>   be rejected, existing commands and TMRs will be terminated when
>   given by the core to the fabric or simply dropped if session logout
>   has already happened (logout terminates all existing exchanges)
> 
> - new PLOGI will initiate deletion of the following sessions
>   (unless deletion is already IN_PROGRESS):
>   - with the same port_name (with logout)
>   - different port_name, different loop_id but the same port_id
>     (with logout)
>   - different port_name, different port_id, but the same loop_id
>     (without logout)
> 
> - additionally each new PLOGI will store imm notify iocb in the
>   same port_name session being deleted. When deletion process
>   completes this iocb will be acked. Only the most recent PLOGI
>   iocb is stored. The older ones will be terminated when replaced.
> 
> - new PRLI will initiate deletion of the following sessions
>   (unless deletion is already IN_PROGRESS):
>   - different port_name, different port_id, but the same loop_id
>    (without logout)
> 
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
> Acked-by: Quinn Tran <quinn.tran@qlogic.com>
> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
> ---
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		               zSeries & Storage
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