linux-kernel - Re: [d_path 1/7] Fix __d_path() for lazy unmounts and make it unambiguous

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Message-ID: <20070420103216.781f4298@the-village.bc.nu>
Date:	Fri, 20 Apr 2007 10:32:16 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andreas Gruenbacher <agruen@...e.de>
Cc:	jjohansen@...e.de, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, chrisw@...s-sol.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [d_path 1/7] Fix __d_path() for lazy unmounts and make it
 unambiguous

On Fri, 20 Apr 2007 01:23:04 +0200
Andreas Gruenbacher <agruen@...e.de> wrote:

> First, when __d_path() hits a lazily unmounted mount point, it tries to prepend
> the name of the lazily unmounted dentry to the path name.  It gets this wrong,
> and also overwrites the slash that separates the name from the following
> pathname component. This patch fixes that; if a process was in directory
> /foo/bar and /foo got lazily unmounted, the old result was ``foobar'' (note the
> missing slash), while the new result with this patch is ``foo/bar''.

ACK the fix

> of ``foobar'' in the example described above.  Subsequent patches propose to
> make getcwd() fail instead of reporting unreachable paths like this one and
> hide unreachable mount points from /proc/mounts.

NAK that change of behaviour on the following patches.
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