Date: Sun, 4 Mar 2012 22:53:22 -0600
From: Malahal Naineni <malahal@us.ibm.com>
To: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH] Get normalized paths for comparing NFS export paths
Message-ID: <20120305045322.GB12833@us.ibm.com>
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Myklebust, Trond [Trond.Myklebust@netapp.com] wrote:
> On Sun, 2012-03-04 at 19:03 -0500, Steve Dickson wrote:
> > 
> > On 03/04/2012 06:26 PM, Myklebust, Trond wrote:
> > > On Sun, 2012-03-04 at 17:58 -0500, Steve Dickson wrote:
> > >> So to restate... this normalizing of the path names (aka striping 
> > >> multiple slashes or added the leading slash) only need to occur on 
> > >> (successful) v4 mounts... Although the former would not be an 
> > >> problem with v2/v3 mounts but its not needed....
> > > 
> > > Normalising for v4 only is OK as far as I'm concerned, but as an
> > > alternative: is there any reason why you can't just grab the path from
> > > '/proc/mounts'?

I don't know where it grabs the path (mtab vs proc file), but it
probably doesn't matter. Either one should work for umount. AFAIR, it is
only the matching entries issue as the umount needs to delete the
correct entry from matb.  In other words, nfs umount bails out without
calling umount when there is no matching entry.

Thanks, Malahal.