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Bug 1584079

Summary:	udisks2 loop-delete doesn't work for the loop device when the image deleted
Product:	Red Hat Enterprise Linux 7	Reporter:	xhe <xhe>
Component:	udisks2	Assignee:	Vojtech Trefny <vtrefny>
Status:	CLOSED WONTFIX	QA Contact:	guazhang <guazhang>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	7.5	CC:	guazhang
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-15 07:39:09 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 xhe@redhat.com 2018-05-30 08:47:02 UTC

Description of problem:
udisks2 loop-delete doesn't work for the loop device when the image deleted

Version-Release number of selected component (if applicable):
udisks2-2.7.3-6.el7.x86_64
udisks2-lvm2-2.7.3-6.el7.x86_64
libudisks2-2.7.3-6.el7.x86_64
RHEL-7.5 RC

How reproducible:
100%

Steps to Reproduce:
1. create and setup loop device with udisksctl
  # udisksctl loop-setup -f /tmp/tfile_loop0
2. delete the image file of /tmp/tfile_loop0
  # rm -rf /tmp/tfile_loop0
3. check the status of loop device
  # losetup -l
  NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
  /dev/loop0         0      0         1  0 /tmp/tfile_loop0 (deleted)
4. udisksctl delete the loop device
  # udisksctl loop-delete --block-device /dev/loop0 ---> no output
5. check the loop device status
  # losetup -l 
  NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
  /dev/loop0         0      0         1  0 /tmp/tfile_loop0 (deleted)

# udisksctl unmount --block-device /dev/loop0
Object /org/freedesktop/UDisks2/block_devices/loop0 is not a mountable filesystem.

Actual results:
* udisksctl doesn't work for device without image, moreover there is no output for the not work.
  # udisksctl loop-delete --block-device /dev/loop0 ---> no output
  # losetup -l 
  NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
  /dev/loop0         0      0         1  0 /tmp/tfile_loop0 (deleted)

Expected results:
* udisksctl works for the device without image or udisksctl can print some information and warning i.e "It is an invalid loop device, suggest to remove it with command ...."


Additional info:

Comment 2 Vojtech Trefny 2018-06-11 09:28:47 UTC

Tested with clean install latest RHEL 7.6 compose (RHEL-7.6-20180607.n.0-Server-x86_64) and I can't reproduce this issue:

$ sudo dd if=/dev/zero of=~/file.img bs=1MiB count=10
10+0 records in
10+0 records out
10485760 bytes (10 MB) copied, 0.00984342 s, 1.1 GB/s

$ sudo udisksctl loop-setup -f ~/file.img 
Mapped file /home/vtrefny/file.img as /dev/loop0.

$ sudo rm file.img 

$ sudo losetup -l
NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop0         0      0         0  0 /home/vtrefny/file.img (deleted)

$ sudo udisksctl loop-delete --block-device /dev/loop0

$ sudo losetup -l
(no output)

Comment 3 xhe@redhat.com 2018-06-11 10:45:13 UTC

Thanks Vojtech,
Let me test it again, let you know my result later.

Comment 6 RHEL Program Management 2021-02-15 07:39:09 UTC

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.