linux-kernel - Re: [PATCH] isofs: mounting to regular file may succeed

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Message-ID: <20070717070814.GA10395@infradead.org>
Date:	Tue, 17 Jul 2007 08:08:14 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Kirill Kuvaldin <kuvkir@...mu.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] isofs: mounting to regular file may succeed

On Tue, Jul 17, 2007 at 12:04:07AM -0700, Andrew Morton wrote:
> I don't think any (all?) other filesystems perform checks like this.
> Is this something which can/should be performed at the VFS level?

As far as the VFS is concerned non-directory mounts are perfectly fine.
There's a lot of use cases for non-directory bind-mounts and at least
some for regular filesystems with a non-directory root.  E.g. the streams
folks are using something like that.    Solaris even ships with non-directory
root filesystems mounted by default these days.

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