Bug 595675

Summary:

Cannot unmount NFS share if Mount version 1 is disabled.

Product:

Red Hat Enterprise Linux 5

Reporter:

Sachin Prabhu <sprabhu>

Component:

nfs-utils

Assignee:

Steve Dickson <steved>

Status:

CLOSED ERRATA

QA Contact:

yanfu,wang <yanwang>

Severity:

medium

Docs Contact:

Priority:

low

Version:

5.4

CC:

jlayton, orion

Target Milestone:

Target Release:

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Hardware:

All

OS:

Linux

Whiteboard:

Fixed In Version:

nfs-utils-1.0.9-52.el5

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Clones:

804218 (view as bug list)

Environment:

Last Closed:

2011-07-21 11:35:22 UTC

Type:

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Regression:

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Mount Type:

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Documentation:

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CRM:

Verified Versions:

Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Bug Depends On:

Bug Blocks:

804218, 804681

Attachments:

Description	Flags
The patch that fixes the problem	none

Description Sachin Prabhu 2010-05-25 11:21:35 UTC

Reproducer:

On server:
edit /etc/sysconfig/nfs and set  MOUNTD_NFS_V1=no
restart nfs

On client: 
Mount a share from the server. This should be successful.
Now try to unmount it. This fails with an error.

# umount /mnt
umount.nfs: vm22:/exports: not found / mounted or server not reachable
umount.nfs: vm22:/exports: not found / mounted or server not reachable


The cause appears to be the fact that the client when mounting uses MOUNT version 3 protocol. However when unmounting, it appears to use version 1 of the MOUNT protocol. Since version 1 is disabled, the client cannot unmount.

Comment 1 Steve Dickson 2011-01-21 18:47:14 UTC

Created attachment 474657 [details]
The patch that fixes the problem

Comment 3 yanfu,wang 2011-06-08 10:05:31 UTC

reproduced on RHEL5.6:
On server:
edit /etc/sysconfig/nfs and set  MOUNTD_NFS_V1=no
restart nfs

[root@dell-pesc430-03 ~]# mount -t nfs dell-pesc430-03.rhts.eng.bos.redhat.com:/scratch/testdir/1 /mnt/
[root@dell-pesc430-03 ~]# cat /proc/mounts 
...
dell-pesc430-03.rhts.eng.bos.redhat.com:/scratch/testdir/1 /mnt nfs rw,vers=3,rsize=32768,wsize=32768,hard,proto=tcp,timeo=600,retrans=2,sec=sys,addr=dell-pesc430-03.rhts.eng.bos.redhat.com 0 0
[root@dell-pesc430-03 ~]# umount /mnt
umount.nfs: dell-pesc430-03.rhts.eng.bos.redhat.com:/scratch/testdir/1: not found / mounted or server not reachable
umount.nfs: dell-pesc430-03.rhts.eng.bos.redhat.com:/scratch/testdir/1: not found / mounted or server not reachable

verified on RHEL5.7 with nfs-utils-1.0.9-52.el5 i386 and x86_64 package, umount is ok if mount version 1 is disabled.

Comment 4 errata-xmlrpc 2011-07-21 11:35:22 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-1048.html