On 1/23/2014 1:10 AM, Nicholas A. Bellinger wrote:
on-immediate
data
Hi Nicholas,
Thanks for the explanation.
However, I went back and double checked, what we are doing is little
different. We are sending
ImmediateData with is larger than FBL, which is < EDTL with F=0. RFC
section 10.4.7.2
points that this should return "Unexpected unsolicited data". Please
note that the
ImmediateData=Yes in this case.
RFC Section 10.4.7.2
+--------------------------+----------+---------------------------+
| Unexpected unsolicited |Aborted | ASC = 0x0c ASCQ = 0x0c |
| data |Command-0B| Write Error |
+--------------------------+----------+---------------------------+
It looks like it is failing in this part of code.
Linux/drivers/target/iscsi/iscsi_target.c:iscsit_setup_scsi_cmd()
if (payload_length > conn->sess->sess_ops->FirstBurstLength) {
908 pr_err("DataSegmentLength: %u is greater than"
909 " FirstBurstLength: %u, protocol error.\n",
910 payload_length,
conn->sess->sess_ops->FirstBurstLength);
911 return iscsit_add_reject_cmd(cmd,
912 ISCSI_REASON_BOOKMARK_INVALID, buf);
913 }
The other case you are mentioning where FBL < EDTL and non-immediate
data (data-out) with F=1. This case should
return "Incorrect amount of data". I am quoting this from RFC section
10.4.7.2
RFC Section 10.4.7.2
+--------------------------+----------+---------------------------+
| Incorrect amount of data |Aborted | ASC = 0x0c ASCQ = 0x0d |
| |Command-0B| Write Error |
+--------------------------+----------+---------------------------+
Please let me know if my understanding is correct.
Here is the dmesg output after execution
[root@root bin]# dmesg | tail -1
[23181.747878] DataSegmentLength: 1024 is greater than FirstBurstLength:
512, protocol error.
[root@root bin]#
--
Thanks and regards.
Tejas Vaykole
Development Engineer.
Calsoft Inc.|Ext- 3096
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