linux-kernel - Re: NFS V4 calls for a NFS v3 mount

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Date:	Sun, 06 Apr 2014 20:01:24 +0200
From:	Toralf Förster <toralf.foerster@....de>
To:	Roger Heflin <rogerheflin@...il.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: NFS V4 calls for a NFS v3 mount

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On 04/06/2014 07:57 PM, Roger Heflin wrote:
> No where in the mount command did you tell it that this was a 
> nfsversion 3 only mount, the mount name itself means nothing to
> mount, so it tired nfs version 4 first then nfs version 3.
> 
> Note this in the man page for nfs: nfsvers=n      The NFS protocol
> version number used to contact the server's NFS service.  If the
> server does  not  support the  requested  version, the mount
> request fails.  If this option is not specified, the client
> negotiates a suitable version with the server, trying version 4
> first, version 3 second, and version 2 last.
> 

ick, I misunderstand the key word "nfs4" in /etc/fstab - I thought
that (and only that) would activate any NFS v4 Calls :

Hre all of my setting
$ grep nfs /etc/fstab
n22:/mnt/ramdisk    /mnt/nfsv2      nfs     auto,bg,intr,soft,nfsvers=2
n22:/mnt/ramdisk    /mnt/nfsv3      nfs     auto,bg,intr,soft
n22:                /mnt/nfsv4      nfs4    auto,bg,intr,soft


Thx for explanation.


> On Sun, Apr 6, 2014 at 12:27 PM, Toralf Förster
> <toralf.foerster@....de> wrote: Probably a question better suited
> for a NFS noobs mailing list (is there any around ?) ...
> 
> While playing with kernel 3.13.x, wireshark and NFS I realized,
> that mounting a NFS v3 share results in NFS V4 Calls - is this
> indented or a wireshark dissector issue ?
> 
> 
> $ cat /etc/exports # /etc/exports: NFS file systems being exported.
> See exports(5). /mnt/ramdisk
> 192.168.0.0/16(rw,fsid=0,insecure,no_subtree_check,async,no_root_squash)
>
> 
> 
> $ grep nfsv3 /etc/fstab n22:/mnt/ramdisk    /mnt/nfsv3      nfs
> auto,bg,intr,soft
> 
- -- 
MfG/Sincerely
Toralf Förster
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