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Bug 915862 - The sync mount option does not work for NFSv4 mounts in RHEL6
Summary: The sync mount option does not work for NFSv4 mounts in RHEL6
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.4
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Scott Mayhew
QA Contact: Chao Ye
URL:
Whiteboard:
: 1027344 (view as bug list)
Depends On:
Blocks: 961026 1030169 1030171
TreeView+ depends on / blocked
 
Reported: 2013-02-26 16:39 UTC by Scott Mayhew
Modified: 2018-12-04 15:04 UTC (History)
14 users (show)

Fixed In Version: kernel-2.6.32-432.el6
Doc Type: Bug Fix
Doc Text:
A previous change in the NFSv4 code resulted in breaking the sync NFSv4 mount option. A patch has been applied that restores functionality of the sync mount option.
Clone Of:
Environment:
Last Closed: 2014-10-14 05:14:41 UTC
Target Upstream Version:
Embargoed:
smayhew: needinfo-

Attachments (Terms of Use)
potential fix for rhel6 kernels (1.60 KB, patch)
2013-02-26 16:39 UTC, Scott Mayhew 		no flags Details | Diff
potential fix for upstream kernel (1.21 KB, patch)
2013-02-26 16:40 UTC, Scott Mayhew 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Knowledge Base (Solution) 316693 0 None None None Never
Red Hat Knowledge Base (Solution) 536623 0 None None None Never
Red Hat Product Errata RHSA-2014:1392 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2014-10-14 01:28:44 UTC

Description Scott Mayhew 2013-02-26 16:39:00 UTC 
Description of problem:
The sync mount option does not work for NFSv4 mounts in RHEL6.

Version-Release number of selected component (if applicable):
All

How reproducible:
Always

Steps to Reproduce:
1. mount -t nfs4 -o sync server:/export /mnt
2. grep sync /proc/mounts
  
Actual results:
The sync option is nowhere to be found.

Expected results:
The sync option should be set.

Additional info:
This was broken by commit c02d7ad (NFSv4: Replace nfs4_path_walk() with VFS path lookup in a private namespace).
Comment 1 Scott Mayhew 2013-02-26 16:39:53 UTC 
Created attachment 703020 [details]
potential fix for rhel6 kernels
Comment 2 Scott Mayhew 2013-02-26 16:40:34 UTC 
Created attachment 703021 [details]
potential fix for upstream kernel
Comment 4 RHEL Program Management 2013-07-31 11:40:32 UTC 
This request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux release.  Product
Management has requested further review of this request by
Red Hat Engineering, for potential inclusion in a Red Hat
Enterprise Linux release for currently deployed products.
This request is not yet committed for inclusion in a release.
Comment 8 Jeff Layton 2013-11-08 16:46:33 UTC 
*** Bug 1027344 has been marked as a duplicate of this bug. ***
Comment 15 Rafael Aquini 2013-12-02 16:19:52 UTC 
Patch(es)
Comment 18 Chao Ye 2014-07-03 08:19:21 UTC 
Reproduced on -431.el6:
======================================================
[root@hp-dl388g8-18 combo]# mount -o vers=4,sync hp-dl388g8-15.rhts.eng.nay.redhat.com:/mnt/testarea/server /mnt/testarea/client
[root@hp-dl388g8-18 combo]# cat /proc/mounts | grep nfs | grep sync
[root@hp-dl388g8-18 combo]# uname -a
Linux hp-dl388g8-18.rhts.eng.nay.redhat.com 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013 x86_64 x86_64 x86_64 GNU/Linux

Verfied on -488.el6:
======================================================
[root@ibm-hs21-01 combo]# mount -o vers=4,sync ibm-x3550m4-02.rhts.eng.nay.redhat.com:/mnt/testarea/server /mnt/testarea/client
[root@ibm-hs21-01 combo]# cat /proc/mounts | grep nfs | grep sync
ibm-x3550m4-02.rhts.eng.nay.redhat.com:/mnt/testarea/server /mnt/testarea/client nfs4 rw,sync,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.66.86.23,minorversion=0,local_lock=none,addr=10.66.87.55 0 0
[root@ibm-hs21-01 combo]# uname -a
Linux ibm-hs21-01.rhts.eng.nay.redhat.com 2.6.32-488.el6.x86_64 #1 SMP Wed Jun 25 21:13:56 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

Move to VERIFIED.
Comment 19 errata-xmlrpc 2014-10-14 05:14:41 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2014-1392.html
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