iSCSI: CmdSN with Text Command

["Eddy Quicksall" <EQuicksall@mediaone.net>]

I am confused about the use of CmdSN with the Text command. The reason is as
follows:

Section 1.2.2.1 says

   iSCSI supports ordered command delivery within a session.  All
   commands (initiator-to-target) are numbered.

   Commands in transit from the initiator SCSI layer to the SCSI target
   layer are numbered by iSCSI; the number is carried by the iSCSI PDU
   as CmdSN (Command-Sequence-Number).

       - CmdSN - the current command Sequence Number advanced by 1 on
      each command shipped except for commands marked for immediate
      delivery.

	... The target iSCSI layer sets the ExpCmdSN to the largest
      non-immediate CmdSN that it is able to deliver to the target
      SCSI layer plus 1 (no holes in the CmdSN sequence).

It looks like the 1st and 3rd paragraphs are saying that the CmdSN of a Text
Command would be advanced.

But, the 2nd and 4th paragraphs hint that only the SCSI layers advance
CmdSN.

Can someone clear this up? i.e., is CmdSN advanced for Text Commands?

mailto:Eddy@Quicksall.com