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Date: Fri, 06 Nov 2009 13:57:36 +0100
From: Norbert van Bolhuis <nvbolhuis@aimvalley.nl>
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To: Tadimarri Sarath Babu <sarath.babu@samsung.com>
Subject: Re: can UBIFS be NFS exported
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Tadimarri Sarath Babu wrote:
> ----- Original Message ----- 
> From: "Norbert van Bolhuis" <nvbolhuis@aimvalley.nl>
> To: <linux-mtd@lists.infradead.org>
> Sent: Thursday, November 05, 2009 7:47 PM
> Subject: can UBIFS be NFS exported
> 
> 
>> just to make sure. UBIFS can not be NFS exported, is this correct ?
>    Can you clarify on this ? I am able to use NFS as rootfs and mount ubifs over the OneNAND .
>> (I need NFS in our distributed system. The server uses UBIFS.
>>  But there is a ISO9660 image on our UBIFS and fortunately
>>  ISO(Z)FS can be NFS exported, so it's not a problem)
>>

I'm talking about the kernel nfsd ability to export UBIFS.
This would allow remote systems to NFS mount a UBIFS directory.

for this UBIFS should implement what's described in
Documentation/filesystems/Exporting. I don't see it for UBIFS.

For JFFS2 for example I see a jffs2_export_ops in fs/jffs2/super.c.

A user-space NFS server (e.g. unfs3) could probably export UBIFS.

In your case I think you're not exporting UBIFS but just use NFS for
your rootfs.