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Bug 1413828

Summary: [ppc64le] Failed to mount nfs as cannot negotiate lower nfs version 3 with server
Product: Red Hat Enterprise Linux 7 Reporter: Xujun Ma <xuma>
Component: nfs-utilsAssignee: Steve Dickson <steved>
Status: CLOSED DUPLICATE QA Contact: Yongcheng Yang <yoyang>
Severity: high Docs Contact:
Priority: high    
Version: 7.3CC: eguan, jiyin, steved, xuma, yoyang, zlang
Target Milestone: rcKeywords: Regression, Reopened
Target Release: ---   
Hardware: ppc64le   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-02-01 19:01:12 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 Xujun Ma 2017-01-17 04:58:17 UTC 
Description of problem:
Failed to mount nfs

Version-Release number of selected component (if applicable):
nfs-utils-1.3.0-0.35.el7.ppc64le
nfs-utils-1.3.0-0.34.el7.ppc64le
kernel:3.10.0-541.el7.ppc64le




How reproducible:
100%

Steps to Reproduce:
1.Use mount cmd to mount a  nfs:
2.
3.

Actual results:
failed to mount nfs with error：
mount.nfs: Protocol not supported
mount.nfs: requested NFS version or transport protocol is not supported


Expected results:
mount nfs successfully

Additional info:
no problem with nfs-utils-1.3.0-0.33.el7.ppc64le
ppc only
Comment 1 Yongcheng Yang 2017-01-17 05:48:40 UTC 
As Bug 1375259 mentioned, it changes to start the mounting process at 4.2 since nfs-utils-1.3.0-0.34.el7. However this failure seems to mounting with an UN-supported nfs version.

Please provide the detailed "Actual results" logs on the nfs client side especially the mount options used.

Also on nfs server, please log:
# exportfs -v
# cat /proc/fs/nfsd/versions
Comment 8 Steve Dickson 2017-02-01 19:01:12 UTC 
This seems to work for me 

# mount -vvv 127.0.0.1:/home /mnt/tmp
mount.nfs: timeout set for Wed Feb  1 14:00:43 2017
mount.nfs: trying text-based options 'vers=4.2,addr=127.0.0.1,clientaddr=127.0.0.1'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'vers=4.1,addr=127.0.0.1,clientaddr=127.0.0.1'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'vers=4.0,addr=127.0.0.1,clientaddr=127.0.0.1'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'addr=127.0.0.1'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 127.0.0.1 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 127.0.0.1 prog 100005 vers 3 prot UDP port 20048

# rpm -q nfs-utils
nfs-utils-1.3.0-0.35.el7.ppc64

Please check your tests to see why false positives are happening
Comment 9 Yongcheng Yang 2017-02-10 09:48:06 UTC 
(In reply to Steve Dickson from comment #8)
> This seems to work for me 
> 
> # rpm -q nfs-utils
> nfs-utils-1.3.0-0.35.el7.ppc64
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Please notice it's the ppc64le but not ppc64.

Maybe it's worth another try with arch "ppc64le".