linux-kernel - Re: [RFC PATCH] nfs: Add NFS3PROC

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Date:	Sat, 23 Jun 2012 12:09:23 -0400
From:	Fields James <bfields@...ldses.org>
To:	"Myklebust, Trond" <Trond.Myklebust@...app.com>
Cc:	Namjae Jeon <linkinjeon@...il.com>,
	Morton Andrew <akpm@...ux-foundation.org>,
	Harrosh Boaz <bharrosh@...asas.com>,
	"<linux-nfs@...r.kernel.org>" <linux-nfs@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Vivek Trivedi <t.vivek@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [RFC PATCH] nfs: Add NFS3PROC_UMOUNT procedure.

On Sat, Jun 23, 2012 at 11:57:10AM -0400, Fields James wrote:
> On Sat, Jun 23, 2012 at 03:52:20PM +0000, Myklebust, Trond wrote:
> > The other objection is that NFSv3 already has a way to do this via the MOUNT protocol. We already call MOUNTPROC3_UMNT/MOUNTPROC_UMNT on unmount of a filesystem.
> > 
> > The problem with this approach is that if the NFS client crashes before it can call this function, then the server never gets notified. That is a problem that your patch has too...
> 
> Yes.  Could you instead work on describing *exactly* what the original
> problem was that prompted this?

("You" here meaning Namjae Jeon, of course).

And note here we've all read the changelog, that's not what I'm asking
for.

I want to know the details of *your* specific case.  "I have X clients
that I use for Y, periodically I want to unmount the exported filesystem
to do Z, I tried doing W but it didn't work...".

--b.
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