iscsi : how should a target process a logout ?

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

All,


Please refer Rev 7.98 Section 3.14 on logout : 

"After receiving the Logout command the target completes all pending
commands (device activity, data to/from the initiator, R2T and status
transfers) that it deems fit to conclude, and then issues the Logout
response and half-closes the TCP connection (sends FIN)."

I object to the following wording :

"target completes all pending commands (device activity, data to/from
the initiator, R2T and status transfers) that it deems fit to conclude"

The above seems to imply that the target is supposed to continue
processing the pending commands and only upon their completion would it
send a logout response.

I suggest that the above wording be removed and something in its place
be added to indicate clearly that a target MUST :

- abort all pending I/Os on that connection/session if the logout reason
code is "close the connection", " or "close the session" respectively.

- transfer the allegiance of all pending commands on that connection if
the logout reason code is "remove the connection for recovery".

- NOT send back scsi response for any aborted I/Os. The logout response
implicitly terminates all the pending I/Os on that connection, [or
session, if the session is being logged out.]

- NOT send any further PDUs to the initiator, other than the response to
the logout.

Comments ?

Thanks,
Santosh


-- 
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Santosh Rao
Software Design Engineer,
HP-UX iSCSI Driver Team,
Hewlett Packard, Cupertino.
email : santoshr@cup.hp.com
Phone : 408-447-3751
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