RE: Another shot at codes and please comment

["Eddy Quicksall" <esquicksall@hotmail.com>]

I vote ok on these OpCodes.

BTW, I would prefer that the opcode field is used strictly for the opcode 
(i.e. not have the X and I bits).

However, if this has already been discussed or if there is just no other 
place for the bits, I will submit.

Eddy


----Original Message Follows----
From: julian_satran@il.ibm.com
To: ips@ece.cmu.edu
Subject: RE: Another shot at codes and please comment
Date: Sat, 19 May 2001 08:51:20 +0300
Venkat,
This seems to be the popular choice for 07 (2 voices for, none against and
silence from the bored majority).
Julo
Venkat Rangan on 19-05-2001 05:12:17
Please respond to Venkat Rangan
To: Julian Satran/Haifa/IBM@IBMIL, ips@ece.cmu.edu
cc:
Subject: RE: Another shot at codes and please comment
Julian,
What is the state of this change? Is this going to be in draft 7, or is
it in draft 6?
Thanks,
Venkat Rangan
Rhapsody Networks Inc.
http://www.rhapsodynetworks.com
-----Original Message-----
From: julian_satran@il.ibm.com [mailto:julian_satran@il.ibm.com]
Sent: Tuesday, May 01, 2001 6:50 AM
To: ips@ece.cmu.edu
Subject: Another shot at codes and please comment
Here is a another version of the opcodes part:
1.1.1.1 Opcode
The Opcode indicates what type of iSCSI PDU the header encapsulates.
The Opcodes are divided into two categories: initiator opcodes and
target opcodes. Initiator opcodes are in PDUs sent by the initiators
(request PDUs), and target opcodes are in PDUs sent by the target
(response PDUs).
Initiators MUST NOT use target opcodes and targets MUST NOT use
initiator opcodes.
Valid initiator opcodes defined in this specification are:
0x00 NOP-Out (from initiator to target)
0x01 SCSI Command (encapsulates a SCSI Command Descriptor Block)
0x02 SCSI Task Management Command
0x03 Login Command
0x04 Text Command
0x05 SCSI Data-out (for WRITE operations)
0x06 Logout Command
0x10 SNACK Request
Valid target opcodes are:
0x20 NOP-In (from target to initiator)
0x21 SCSI Response (contains SCSI status and possibly sense
information or other response information)
0x22 SCSI Task Management Response
0x23 Login Response
0x24 Text Response
0x25 SCSI Data-in (for READ operations)
0x26 Logout Response
0x31 Ready To Transfer (R2T - sent by target to initiator when it is
ready to receive data from initiator)
0x32 Asynchronous Message (sent by target to initiator to indicate
certain special conditions)
0x3f Reject
Initiator opcodes 0x1c-0x1e and target opcodes 0x3c-0x3e are vendor
specific codes.
Please comment,
Julo
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