Re: iSCSI draft spec questions

[julian_satran@il.ibm.com]

Keith,

1 - Look at 3.2.1 - No need took inside the CDB for longer than 16 bytes
CDBs. If the CDB is shorter you have
to know how to find the length from within the CDB.

2 - An AE notification is specified in the new draft

3- Fixed in new draft

4-Fixed in new draft

5-Will have to register with IANA

Thanks,
Julo

Keith Young <keithy@axionspatial.com> on 25/10/2000 22:38:41

Please respond to Keith Young <keithy@axionspatial.com>

To:   Julian Satran <satran@haifa.vnet.ibm.com>
cc:   Kalman Meth/Haifa/IBM@IBMIL
Subject:  iSCSI draft spec questions





hello!

I'm in the middle of writing an iscsi target, and had a few questions about
things I have encountered so far. I would really appreciate your taking a
moment to point me in the right direction:

referring to your document <draft-satran-iscsi-01.txt> dated July 10/2000:

1) in section 3.2 (scsi command), how is the size of the scsi CDB
specified?
scsi commands are various sizes, such as the 6-byte INQUIRY command which
returns 96 bytes. other than looking at the first byte of the CDB to find
out what command it is and keeping a lookup table of the lengths of
different scsi commands, i cant seem to find out where the length is
specified.

2) in 3.7.1 (scsi task management command), wouldn't funtion #4 constitute
a
security hole? If one initiator is allowed to abort all tasks on the target
for all initiators, the other initiators would lose data if they arent
notified with an Asynchronous Event, since only the initiator that
requested
the Clear Task Set function would get the SCSI Task Management Response
sent
to it.

3) in 3.10 (scsi data), there is a typo (byte offset 28 is printed twice).
I
assume the proper length of the reserved field before CmdRN is 8 bytes, and
the reserved field after ExpStatRN is  12 bytes rather than 16 (starting at
offset 36 rather than 32)

4) in 3.13 (login command), the byte offset numbering is either missing a
field or has a typo. If ISID+TSID are 4 bytes total, InitCmdRN should start
at offset 20 rather than 24

5) in 6.4 , what is the usual port number used for iSCSI targets, as in
/etc/services ?

thanks for your help!

Keith Young
Senior Engineer, Axion Spatial Imaging Ltd.
email: keithy@axionspatial.com
http://www.axionspatial.com