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[OpenStack Infra <1493350@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/277606
Committed: https://git.openstack.org/cgit/openstack/os-brick/commit/?id=82cdb40f870c958da6ab6ef447b35be2eaec5c8d
Submitter: Jenkins
Branch:    master

commit 82cdb40f870c958da6ab6ef447b35be2eaec5c8d
Author: Jenkins <jenkins@xxxxxxxxxxxxxxxxxxxx>
Date:   Thu Feb 11 17:22:19 2016 +0000

    Lun id's > 255 should be converted to hex
    
    This patch addresses the issue where lun id's values are larger
    than 255 and are being kept as integers. This causes the volume and
    search paths to be malformed and volumes can't be found. This patch
    adds two functions to linuxscsi.py to process the lun id's; they can
    process both a single lun id and a list of them. If a lun id has a
    value larger than 255 it is converted to hex. This patch also modifies
    the necessary unit tests and adds ones to cover the new main function.
    
    Change-Id: Ib0b2f239a8152275de9ea66fa99a286dfbe53d57
    Closes-bug: #1493350


** Changed in: os-brick
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1493350

Title:
  Attach Volume fail : Cinder - ISCSI device symlinks under /dev/disk
  /by-path in hex.

Status in Cinder:
  Confirmed
Status in OpenStack Compute (nova):
  Opinion
Status in os-brick:
  Fix Released

Bug description:
  As part of POC for an enterprise storage we have implemented an ISCSIDriver.
  Volume operation works as expected.

  Facing an issue with attach volume. Request your help.

  1. If the volume lun id in backend storage is less than 255 attach volume works fine. Symlinks in /dev/disk/by-path is as below
  lrwxrwxrwx 1 root root   9 Jun 18 15:18 ip-192.168.5.100:3260-iscsi-iqn.1989-10.jp.co.xyz:storage.ttsp.2ec7fdda.ff5c4a16.0-lun-169 -> ../../sde
  lrwxrwxrwx 1 root root   9 Aug 26 14:47 ip-192.168.5.100:3260-iscsi-iqn.1989-10.jp.co.xyz:storage.ttsp.2ec7fdda.ff5c4a16.0-lun-172 -> ../../sdi

  2. If volume lun id is more than 255, /dev/disk/by-path is an hexadecimal number and hence attach volume is failing with message Volume path not found.  Symlinks in /dev/disk/by-path is as below [hexadecimal lun id  according to SCSI standard ( REPORT LUNS)]
  lrwxrwxrwx 1 root root   9 Aug 26 14:47 ip-192.168.5.100:3260-iscsi-iqn.1989-10.jp.co.xxx:storage.ttsp.2ec7fdda.ff5c4a16.0-lun-0x016b000000000000 -> ../../sdh
  lrwxrwxrwx 1 root root   9 Jun 18 15:18 ip-192.168.5.100:3260-iscsi-iqn.1989-10.jp.co.xxx:storage.ttsp.2ec7fdda.ff5c4a16.0-lun-0x0200000000000000 -> ../../sdc

  Please provide your suggession.

  I would suggest cinder utility to have a check of both with normal
  lun-id in /dev/disk/by-path as well as hexadecimal lunid.

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