Bug 572958

Summary:	Can't create snapshots!
Product:	[Fedora] Fedora	Reporter:	Mario Ceresa <mrceresa>
Component:	btrfs-progs	Assignee:	Josef Bacik <josef>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	12	CC:	josef, mmahut
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-03-12 13:27:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Mario Ceresa 2010-03-12 13:23:26 UTC

Description of problem:
I'm unable to create a snapshot

Version-Release number of selected component (if applicable):
btrfs-progs-0.19.9.fc12
kernel-2.6.32.9-70.fc12

How reproducible:
Always

Steps to Reproduce:
1. Create a 300MB btrfs file, format and mount as a loop device:

dd if=/dev/zero of=btrfs.img count=300 bs=1M
losetup /dev/loop0 btrfs.img
mkfs.btrfs -L test /dev/loop0
mount /dev/loop0 /mnt/btrfs/

2. Create a snapshot:
btrfsctl -s snap0 /mnt/btrfs/
  
Actual results:
ioctl:: Inappropriate ioctl for device

Expected results:
Create snapshot

Additional info:
# modinfo btrfs
filename:       /lib/modules/2.6.32.9-70.fc12.i686/kernel/fs/btrfs/btrfs.ko
license:        GPL
srcversion:     515D00B63448802E7928F98
depends:        libcrc32c,zlib_deflate
vermagic:       2.6.32.9-70.fc12.i686 SMP mod_unload 686

As reported in 
http://www.linuxquestions.org/questions/linux-software-2/btrfs-filesystem-problems-with-btrfsctl-when-shrinking-and-defragmenting-fs-723177/

the problem might be a version mismatch between the kernel module and the utility package. But I don't know how to check the kernel module version!

Comment 1 Mario Ceresa 2010-03-12 13:27:41 UTC

I just noticed that there was a duplicate bug. I didn't find it neither looking with google nor with the bodhi "bug reports" function.

I'll close the bug, sorry for the noise.

Mario

*** This bug has been marked as a duplicate of bug 503726 ***