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Bug 790961 - pNFS: Auto-load the pNFS kernel module
Summary: pNFS: Auto-load the pNFS kernel module
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: alpha
: 6.3
Assignee: nfs-maint
QA Contact: Filesystem QE
URL:
Whiteboard: pNFS
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-02-15 19:57 UTC by Steve Dickson
Modified: 2013-03-04 00:22 UTC (History)
3 users (show)

Fixed In Version: kernel-2.6.32-241.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-06-20 08:25:30 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0862 0 normal SHIPPED_LIVE Moderate: Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update 2012-06-20 12:55:00 UTC

Description Steve Dickson 2012-02-15 19:57:30 UTC 
Description of problem:

Today for the pNFS module to be auto loaded when the --minorversion=1 mount option is used, an entry in /etc/modprobe.conf needs to be added or a file in /etc/modprob.d has to be created. Lets simply this by embedding the necessary alias into the kernel module code. Basically back porting 

commit f85ef69ce08bc2209858135328335f668ba35bdb
Author: J. Bruce Fields <bfields>
Date:   Fri Jul 15 19:18:42 2011 -0400

    pnfs: simplify pnfs files module autoloading
    
    Embed the necessary alias into the module rather than waiting for
    someone to add it to /etc/modprobe.conf
    
    Signed-off-by: J. Bruce Fields <bfields>
    Signed-off-by: Trond Myklebust <Trond.Myklebust>
Comment 1 RHEL Program Management 2012-02-15 20:09:30 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 3 Aristeu Rozanski 2012-02-28 17:03:43 UTC 
Patch(es) available on kernel-2.6.32-241.el6
Comment 6 Jian Li 2012-03-09 10:55:48 UTC 
Hi Steve,

How to test this bug, what's the function of module alias? When I mount with option --minorversion=1 to pnfs server which support file layout, will nfs_layout_nfsv41_files be installed automatically?
Comment 7 Steve Dickson 2012-03-09 12:41:37 UTC 
(In reply to comment #6)
> Hi Steve,
> 
> How to test this bug, what's the function of module alias? When I mount with
> option --minorversion=1 to pnfs server which support file layout, will
> nfs_layout_nfsv41_files be installed automatically?
Yes... After the mount with the -o minorversion=1 option, simply
do a 'lsmod | grep nfs' to ensure the nfs_layout_nfsv41_files module
was loaded.
Comment 8 Jian Li 2012-03-13 03:25:55 UTC 
This bug is tested by newpynfs. Two nfspynfs tasks is started:
1. 
#./nfs4server.py --is_ds -r --use_files --port=30000 --dataservers=/root/ds.conf
2.
#./nfs4server.py -r --use_files --dataservers=/root/ds.conf

ds.conf:
***
localhost:30000/files

Then mount with such command:
#mount localhost:/files /mnt/test -o vers=4,minorversion=1

check module with 
#lsmod | grep nfs

and get:
***
nfs_layout_nfsv41_files    18540  1
nfs                   402752  2 nfs_layout_nfsv41_files
lockd                  74270  1 nfs
fscache                46859  1 nfs
nfs_acl                 2647  1 nfs
auth_rpcgss            44895  1 nfs
sunrpc                263580  11 nfs_layout_nfsv41_files,nfs,lockd,nfs_acl,auth_rpcgss
Comment 10 errata-xmlrpc 2012-06-20 08:25:30 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-2012-0862.html
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