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From: Torsten Foertsch <torsten.foertsch@gmx.net>
To: Christoph Hellwig <hch@infradead.org>
Subject: Re: [2.4.19] How to get the path name of a struct dentry
Date: Wed, 12 Mar 2003 13:38:42 +0100
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References: <200303121033.08560.torsten.foertsch@gmx.net> <200303121138.31387.torsten.foertsch@gmx.net> <20030312104741.A9625@infradead.org>
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On Wednesday 12 March 2003 11:47, Christoph Hellwig wrote:
> On Wed, Mar 12, 2003 at 11:38:27AM +0100, Torsten Foertsch wrote:
> > Next question, is there a way to get the dentry and vfsmount of /? I mean
> > not current->fs->root and current->fs->rootmnt. They can be chrooted. I
> > mean the real /.
>
> No.  Esecially as there is not single "real" root.

That means one can build a system with 2 (or more) completely independent file 
system areas combining chroot() and pivot_root(), doesn't it?

                                 fork()
                                   |
                   +---------------+--------------+
                   |                              |
             chroot /area1                        |
                   |                              |
             signal parent ====================> pause
                   |                              |
                  ...                        pivot_root /area2
                                                  |
                                                 ...

Torsten
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