iscsi: rev 05 - section 2.5.1 is incomplete

[Ralph Weber <ralphoweber@compuserve.com>]

The following statement is only half true:

   For the <Clear Task Set>, if the SCSI control mode
   enables AE reporting, the target MUST send an
   Asynchronous Event to all other attached initiators
   to inform them that all pending tasks are cancelled.

If the SCSI control mode [page] does not enable AE
reporting, then the target MUST establish a unit
attention condition for all other attached initiators.

In fact, the target must establish a unit attention
condition regardless of the contents of the SCSI
control mode page.  At this is specified in SAM-2.
What the control mode pages does is tell the target
how to report that unit attention condition; via
a Check Condition on the next command received, or
via an asynchronous event report.

Someone might read the iSCSI version 05 text as
releasing them from the SAM-2 requirement, which
I doubt will be helpful to the SCSI community
at large.

The same problem exists in the following 2.5.1
text:

   For the <Target Warm Reset> and <Target Cold Reset>
   functions, the target cancels all pending operations
   and are both equivalent to the Target Reset as
   specified by SAM-2.  Provided that SCSI control mode
   enables AE reporting, the target MUST send an
   Asynchronous Event to all attached initiators
   notifying them that the target is being reset.

FYI

Ralph...