Re: aborting an out of sequence cmdSN

[Santosh Rao <santoshr@cup.hp.com>]

I'd think option 1 is the simplest (with the caveat that the task mgmt
PDU referred to is the Abort Task.) and only impacts the affected
command/task.

Pierre Labat and I have asked for this 4 months ago. (See :
http://ips.pdl.cs.cmu.edu/mail/msg02958.html). The concept of connection
allegiance should be extended to include the Abort Task. Also,
connection allegiance should apply to the task (which spans multiple
commands in the case of linked commands.), allowing for a deterministic
clean up of stale PDUs of the task through the use of Abort Task.

- Santosh

Sandeep Joshi wrote:

> 
> So our options for abort_task boil down to..
> (1) use connection allegiance for TASK MGMT PDU.
> (2) reject all commands prior to cmdSN of TASK MGMT PDU.
> (3) cmdSN of original task is sent with TASK MGMT PDU and
>     target at the iSCSI layer keeps state.
> (4) iSCSI initiator retains state for deleted tasks to ensure
>     that R2T/Scsi Responses are appropriately handled.
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