Bug 137605

Summary:	Remotely mounting CDROM causes umount problems.
Product:	Red Hat Enterprise Linux 3	Reporter:	Ryan Daly <daly>
Component:	mount	Assignee:	Elliot Lee <sopwith>
Status:	CLOSED NOTABUG	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0
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:	2004-11-19 21:10:04 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 Ryan Daly 2004-10-29 19:10:12 UTC

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Description of problem:
Remotely NFS mounting a CD-ROM will cause the local file system to
remain busy, even after the remote client has unmounted the file system.

: linux13 137#; eject /cdrom1
umount: /cdrom1: device is busy
eject: unmount of `/dev/cdrom1' failed

The workaround is doing the following:

: linux13 138#; exportfs -ua ; eject /cdrom1 ; exportfs -a
: linux13 139#; 

This works every time.

Version-Release number of selected component (if applicable):
mount-2.11y-31.1, eject-2.0.13-2

How reproducible:
Always

Steps to Reproduce:
1. On local system: Mount CD-ROM.
2. On local system: Export file system so a client can mount it.
3. On client system: Mount the CD-ROM.
4. On client system: Unmount the CD-ROM.
5. On local system: Attempt to eject, or unmount CD-ROM
6. On local system: Receive "device is busy" and run exportfs -ua,
then eject to really eject CD-ROM.

Expected Results:  Expect that exporting a file system shouldn't
prevent it from being unmounted locally.

Additional info:

Comment 1 Elliot Lee 2004-11-19 21:10:04 UTC

This is expected behaviour. Exporting a filesystem is a way of putting
that file system in use, and you can't unmount a filesystem that is
currently in use.