linux-kernel - Re: [PATCH] UBIFS: fill f

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Message-ID: <20080902214841.GA9204@infradead.org>
Date:	Tue, 2 Sep 2008 17:48:41 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Andreas Dilger <adilger@....com>,
	Artem Bityutskiy <dedekind@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Adrian Hunter <ext-adrian.hunter@...ia.com>,
	linux-nfs@...r.kernel.org
Subject: Re: [PATCH] UBIFS: fill f_fsid

On Tue, Sep 02, 2008 at 10:26:09PM +0100, David Woodhouse wrote:
> > We also called the filesystem part of the NFS filehandle in a few
> > places, and for those it's correct that it should be stable.  Currently
> > the fsid is either created from the dev_t in kernelspace or from
> > uuids extracted through libuuid in userspace.
> 
> Or from the f_fsid returned in statfs(), as of a week or so ago.

I think that's a rather bad idea.  As mentioned before f_fsid is
basically random.

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