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Date: Thu, 12 Feb 2009 15:31:46 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Jan Engelhardt <jengelh@medozas.de>
Cc: John Ogness <dazukocode@ogness.net>, linux-kernel@vger.kernel.org,
       malware-list@lists.printk.net, eparis@redhat.com, hch@infradead.org,
       alan@lxorguk.ukuu.org.uk
Subject: Re: [PATCHv2 1/5] VFS: DazukoFS, stackable-fs, file access control
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References: <8663jrgwo4.fsf@johno.fn.ogness.net> <861vufgwlt.fsf@johno.fn.ogness.net> <alpine.LSU.2.00.0902121618500.5658@fbirervta.pbzchgretzou.qr>
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On Thu, Feb 12, 2009 at 04:27:14PM +0100, Jan Engelhardt wrote:

> This ought to be done better in light of the problem that one
> could issue `mount -t dazukofs /mnt /opt`
> In kernel code, I'm thinking something like
> 
> static int foofs_dothis(...)
> {
> 	buf = call d_path on sb->s_root

Call what on what?  There is no such thing as the mountpoint of superblock.