Re: (iSCSI) opcodes

[Daniel Smith <dfsmith@almaden.ibm.com>]

Matt Wakeley wrote:
> 
> I think you guys are overloading the opcode.  What does all this "classes of

I've only seen four useful distinctions of opcode, probably fewer in
practice.

1. Opcodes that generate a new Initiator Task Tag (ITT).  (E.g., SCSI op.)
2. Opcodes that use an existing ITT.  (E.g., data.)
3. Opcodes that retire an ITT (last use of the ITT).  (E.g., status.)
4. Opcodes that don't use an ITT at all.  (E.g., AEN.)

Of course, I'm a little bit biased in what I consider a distinction.

Daniel Smith.
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