RE: [PATCH] nfs(5): Document the minorversion= mount option

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> -----Original Message-----
> From: linux-nfs-owner@xxxxxxxxxxxxxxx [mailto:linux-nfs-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Chuck Lever
> Sent: Wednesday, November 14, 2012 5:39 PM
> To: linux-nfs@xxxxxxxxxxxxxxx
> Subject: [PATCH] nfs(5): Document the minorversion= mount option
> 
> Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
> ---
> 
> Our pals on the Solaris team recently noticed that the minorversion= option
> is not documented in nfs(5).  This is a first take, just to start the conversation.
> I'm pretty sure I got the kernel version information wrong, for instance.
> 
> Any other comments?

You might want to note that it is deprecated in favour of the "vers=4.1" notation, and for that reason we might want to forgo documenting it altogether.

>  utils/mount/nfs.man |   17 +++++++++++++++++
>  1 files changed, 17 insertions(+), 0 deletions(-)
> 
> diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index
> c15de98..66198cc 100644
> --- a/utils/mount/nfs.man
> +++ b/utils/mount/nfs.man
> @@ -777,6 +777,23 @@ so if this mount option is not specified, the NFS
> version 4 client  uses the TCP protocol.
>  Refer to the TRANSPORT METHODS section for more details.
>  .TP 1.5i
> +.BI minorversion= n
> +Specifies the protocol minor version number.
> +NFSv4 introduces "minor versioning," where NFS protocol enhancements
> +can be introduced without bumping the NFS protocol version number.
> +Before kernel 2.6.38, the minor version is always zero, and this option
> +is not recognized.
> +After this kernel, specifying "minorversion=1" enables a number of
> +advanced features, such as NFSv4 sessions.
> +.IP
> +Recent kernels allow the minor version to be specified using the .B
> +vers= option.
> +For example, specifying
> +.B vers=4.1
> +is the same as specifying
> +.BR vers=4,minorversion=1 .
> +.TP 1.5i
>  .BI port= n
>  The numeric value of the server's NFS service port.
>  If the server's NFS service is not available on the specified port,
> 
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