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Bug 855180

Summary:	attempting to change the thin pool volume to read-only should not be allowed if not supported
Product:	Red Hat Enterprise Linux 6	Reporter:	Corey Marthaler <cmarthal>
Component:	lvm2	Assignee:	Zdenek Kabelac <zkabelac>
Status:	CLOSED ERRATA	QA Contact:	Cluster QE <mspqa-list>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.3	CC:	agk, dwysocha, heinzm, jbrassow, msnitzer, nperic, prajnoha, prockai, thornber, zkabelac
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	lvm2-2.02.98-1.el6	Doc Type:	Bug Fix
Doc Text:	When user tried to convert thin snapshot volume into a read-only volume, internal error messages have been displayed and operation has failed. This has been fixed and thin snapshot volumes now could be converted to read-only mode. Also for the conversion of the thin pool to read-only mode explicit error message has been added about unsupported feature.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-02-21 08:13:25 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:

Description Corey Marthaler 2012-09-06 22:38:30 UTC

Description of problem:

Creating thinpool and corresponding thin origin volume
lvcreate --thinpool POOL -L 1G snapper_thinp
lvcreate --virtualsize 1G --thinpool snapper_thinp/POOL -n origin
Making snapshot of origin volume
lvcreate -s /dev/snapper_thinp/origin -n display_snap

[root@taft-01 ~]# lvs -a -o +devices
  LV           VG            Attr     LSize  Pool Origin Data%  Devices
  POOL         snapper_thinp twi-a-tz  1.00g               0.00 POOL_tdata(0)
  [POOL_tdata] snapper_thinp Twi-aot-  1.00g                    /dev/sdd1(0)
  [POOL_tmeta] snapper_thinp ewi-aot-  4.00m                    /dev/sdg1(0)
  display_snap snapper_thinp Vwi-a-tz  1.00g POOL origin   0.00 
  origin       snapper_thinp Vwi-a-tz  1.00g POOL          0.00

[root@taft-01 ~]# lvchange -pr snapper_thinp/POOL
  device-mapper: reload ioctl on  failed: Invalid argument
  Failed to lock POOL
  Internal error: metadata commit (or revert) missing before dropping metadata from cache.
  Internal error: metadata commit (or revert) missing before dropping metadata from cache.


Version-Release number of selected component (if applicable):
2.6.32-279.el6.x86_64

lvm2-2.02.95-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
lvm2-libs-2.02.95-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
lvm2-cluster-2.02.95-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
udev-147-2.41.el6    BUILT: Thu Mar  1 13:01:08 CST 2012
device-mapper-1.02.74-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
device-mapper-libs-1.02.74-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
device-mapper-event-1.02.74-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
device-mapper-event-libs-1.02.74-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012
cmirror-2.02.95-10.el6    BUILT: Fri May 18 03:26:00 CDT 2012

Comment 1 Zdenek Kabelac 2012-10-05 08:45:50 UTC

Allowing modification of thin snap volumes with upstream commit:

https://www.redhat.com/archives/lvm-devel/2012-October/msg00014.html

Comment 3 Nenad Peric 2012-10-31 12:00:40 UTC

Could you please correct the typo in the error message?

[root@r6-node01:~]$ lvchange -pr snapper_thinp/POOL
  Change permissions of thin pool "POOL" not yes supported.


Verifying the fix works as such with lvm2-2.02.98-2.el6.x86_64.

Comment 4 Peter Rajnoha 2012-10-31 12:53:07 UTC

(In reply to comment #3)
> Could you please correct the typo in the error message?
> 
> [root@r6-node01:~]$ lvchange -pr snapper_thinp/POOL
>   Change permissions of thin pool "POOL" not yes supported.
> 

Already fixed upstream, I'll add that in next 6.4 build.

Comment 5 errata-xmlrpc 2013-02-21 08:13:25 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.

http://rhn.redhat.com/errata/RHBA-2013-0501.html