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Bug 902863

Summary: targetcli does not export proper information when using block backstore
Product: Red Hat Enterprise Linux 7 Reporter: Bruno Goncalves <bgoncalv>
Component: targetcliAssignee: Andy Grover <agrover>
Status: CLOSED DUPLICATE QA Contact: Bruno Goncalves <bgoncalv>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: agrover
Target Milestone: rcKeywords: Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-02-11 01:31:20 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 737672    

Description Bruno Goncalves 2013-01-22 14:43:48 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
rpm -q targetcli
targetcli-2.0rc1.fb19-1.el7.noarch

uname -r
3.7.0-0.32.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.modprobe scsi_debug  sector_size=4096 dev_size_mb=10 lowest_aligned=7 physblk_exp=3 num_parts=1

**new device is /dev/sdc

2.Create backstore target
targetcli /iscsi create iqn.2009-10.com.redhat:storage-1
targetcli /iscsi/iqn.2009-10.com.redhat:storage-1/tpg1/portals create ::0 3260
targetcli /backstores/block create target1-lun1 /dev/sdc
targetcli /iscsi/iqn.2009-10.com.redhat:storage-1/tpg1/luns create /backstores/block/target1-lun1 1
targetcli /iscsi set discovery_auth enable=0
targetcli /iscsi/iqn.2009-10.com.redhat:storage-1/tpg1 set attribute authentication=0
targetcli /iscsi/iqn.2009-10.com.redhat:storage-1/tpg1 set attribute generate_node_acls=1
targetcli /iscsi/iqn.2009-10.com.redhat:storage-1/tpg1 set attribute demo_mode_write_protect=0
targetcli saveconfig

iscsiadm -m discovery -I default -p 127.0.0.1 -t st
::ffff:127.0.0.1:3260,1 iqn.2009-10.com.redhat:storage-1

iscsiadm -m node -l 
Logging in to [iface: default, target: iqn.2009-10.com.redhat:storage-1, portal: ::ffff:127.0.0.1,3260] (multiple)
Login to [iface: default, target: iqn.2009-10.com.redhat:storage-1, portal: ::ffff:127.0.0.1,3260] successful.

** new device /dev/sdd
3. Get VDP info from each device

sg_inq -p 0xb0 /dev/sdc
VPD INQUIRY: Block limits page (SBC)
  Maximum compare and write length: 0 blocks
  Optimal transfer length granularity: 8 blocks
  Maximum transfer length: 2560 blocks
  Optimal transfer length: 64 blocks
  Maximum prefetch, xdread, xdwrite transfer length: 0 blocks
  Maximum unmap LBA count: 0
  Maximum unmap block descriptor count: 0
  Optimal unmap granularity: 1
  Unmap granularity alignment valid: 0
  Unmap granularity alignment: 0
  
sg_inq -p 0xb0 /dev/sdd
VPD INQUIRY: Block limits page (SBC)
  Maximum compare and write length: 0 blocks
  Optimal transfer length granularity: 1 blocks
  Maximum transfer length: 8192 blocks
  Optimal transfer length: 8192 blocks
  Maximum prefetch, xdread, xdwrite transfer length: 0 blocks



Actual results:
Backstore VPD:
Optimal transfer length granularity: 8 blocks
Optimal transfer length: 64 blocks

LUN VPD:
Optimal transfer length granularity: 1 blocks
Optimal transfer length: 8192 blocks

Expected results:
targetcli should export the fields below properly.
Optimal transfer length granularity: 1 blocks
Optimal transfer length: 8192 blocks


Additional info:
When using pscsi the correct value is exported
sg_inq -p 0xb0 /dev/sdd
VPD INQUIRY: Block limits page (SBC)
  Maximum compare and write length: 0 blocks
  Optimal transfer length granularity: 8 blocks
  Maximum transfer length: 2560 blocks
  Optimal transfer length: 64 blocks
  Maximum prefetch, xdread, xdwrite transfer length: 0 blocks
  Maximum unmap LBA count: 0
  Maximum unmap block descriptor count: 0
  Optimal unmap granularity: 1
  Unmap granularity alignment valid: 0
  Unmap granularity alignment: 0
Comment 1 Andy Grover 2013-02-27 00:49:51 UTC 
related to bug 895312.
Comment 4 Andy Grover 2014-02-11 01:31:20 UTC 

*** This bug has been marked as a duplicate of bug 873474 ***