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Bug 1294955

Summary:	set-label fails to set some unicode characters as the NTFS filesystem label
Product:	Red Hat Enterprise Linux 6	Reporter:	Hu Zhang <huzhan>
Component:	libguestfs-winsupport	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.8	CC:	leiwang, linl, ptoscano, wshi, xchen
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-08 16:50:52 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:	1301844

Description Hu Zhang 2015-12-31 09:32:41 UTC

Description of problem:
set-label fails to set some unicode characters as the NTFS filesystem label. This works well on rhel7.2

Version-Release number of selected component (if applicable):
libguestfs-1.20.11-16.el6.x86_64
libguestfs-winsupport-1.0-7.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. # guestfish -a test.raw
><fs> list-filesystems
/dev/sda1: ntfs

2. Set the label as "水"
><fs> set-label /dev/sda1 "水"
><fs>

3. Get the label
><fs> vfs-label /dev/sda1

><fs>


Actual results:
In step 3, nothing returned.

Expected results:
In step 2, the label should be set successfully.
In step 3, the character "水" should be returned.


Additional info:

Comment 1 Richard W.M. Jones 2016-01-04 15:31:42 UTC

One line reproducer:

guestfish -N fs:ntfs set-label /dev/sda1 水 : vfs-label /dev/sda1

Upstream: works OK

RHEL 7.2: works OK

RHEL 6.8: fails as described in the bug

I'm inclined to say this is a real bug, but one which we're not
really interested in fixing in RHEL 6.  However I'll leave it up
to Pino to comment.

Comment 2 Pino Toscano 2016-01-15 17:54:21 UTC

This seems due to the different ntfsprogs version available in libguestfs-winsupport:

libguestfs: trace: set_label "/dev/sda1" "\xe6\xb0\xb4"
libguestfs: send_to_daemon: 68 bytes: 00 00 00 40 | 20 00 f5 f5 | 00 00 00 04 | 00 00 01 36 | 00 00 00 00 | ...
guestfsd: main_loop: proc 278 (mkfs) took 0.14 seconds
guestfsd: main_loop: new request, len 0x40
blkid -c /dev/null -o value -s TYPE /dev/sda1
ntfslabel /dev/sda1 \xe6\xb0\xb4
Unable to convert label string to Unicode: Invalid or incomplete multibyte or wide character.
libguestfs: recv_from_daemon: 40 bytes: 20 00 f5 f5 | 00 00 00 04 | 00 00 01 36 | 00 00 00 01 | 00 12 34 02 | ...
libguestfs: trace: set_label = 0

Versions available:
- RHEL 6: ntfslabel v2.0.0 (libntfs 10:0:0)
- RHEL 7: ntfslabel v2015.3.14 (libntfs-3g)

Comment 4 Pino Toscano 2016-11-08 16:50:52 UTC

Moving to libguestfs-winsupport, which is the package providing the support for NTFS filesystem.

Also, closing this bug as WONTFIX, since:
- it is not a regression, but simply a bug in the old libntfs
- it is not a problem in libguestfs-winsupport for RHEL 7, since libntfs-3g there is more recent and supports this case better
- it is a corner case, usually ASCII characters are used for labels of filesystems