Bug 1301091

Summary:	[libblkid] Failed to get offset of the xfs_external_log signature
Product:	Red Hat Enterprise Linux 7	Reporter:	Julio Entrena Perez <jentrena>
Component:	util-linux	Assignee:	Karel Zak <kzak>
Status:	CLOSED ERRATA	QA Contact:	qe-baseos-daemons
Severity:	high	Docs Contact:
Priority:	urgent
Version:	7.2	CC:	awshaikh, bsrirama, fkrska, jentrena, jradhakr, jscotka, mkolaja, pdwyer, riehecky
Target Milestone:	rc	Keywords:	EasyFix, Patch, Regression, ZStream
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1302332 (view as bug list)		Environment:
Last Closed:	2016-11-03 21:26:27 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:
Bug Depends On:
Bug Blocks:	1203710, 1289485, 1302332

Description Julio Entrena Perez 2016-01-22 14:57:42 UTC

Description of problem:
After deleting a LV that contained a XFS filesystem and creating a new LV in the same location, libblkid fails to remove the XFS signature. 

Version-Release number of selected component (if applicable):
libblkid 2.23.2-26.el7

How reproducible:
Always

Steps to Reproduce:
1. lvcreate -L 16m -n lv1 vg1
2. mkfs.xfs /dev/vg1/lv1
3. lvremove vg1/lv
4. lvcreate -L 16m -n lv1 vg1

Actual results:
# lvcreate -L 16m -n lv1 vg1 
WARNING: xfs signature detected on /dev/vg1/lv1 at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/vg1/lv1.
  Failed to get offset of the xfs_external_log signature on /dev/vg1/lv1.
  1 existing signature left on the device.
  Logical volume "lv1" created.

Expected results:
# lvcreate -L 16m -n lv1 vg1
WARNING: xfs signature detected on /dev/vg1/lv1 at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/vg1/lv1.
  Logical volume "lv1" created.

Additional info:
Bug does not reproduce on previous libblkid-2.23.2-22.el7_1.1.

Comment 2 Julio Entrena Perez 2016-01-25 13:54:45 UTC

The following patch could be the related:

"libblkid: make XFS Log visible for wipefs"
commit d5b7d2912afceac3774d1aaea9e8486b54d4e9e9

Comment 3 Julio Entrena Perez 2016-01-25 17:45:56 UTC

After building test packages that include d5b7d2912afceac3774d1aaea9e8486b54d4e9e9 I confirm that the problem is resolved by it.

Comment 10 Byreddy 2016-04-14 09:15:06 UTC

i hit the same issue, after updating util-linux to 2.23.2-26.el7_2.2.x86_64, issue not observed.  thanks for the fix

Comment 16 errata-xmlrpc 2016-11-03 21:26:27 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-2605.html