From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: ext3 and like, mount point in module
Date: Sat, 1 Aug 2015 14:43:05 +0100
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Cc: Tomas Bortoli <tomasbortoli@hotmail.it>,
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To: Richard Weinberger <richard@nod.at>
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On Sat, Aug 01, 2015 at 03:27:17PM +0200, Richard Weinberger wrote:

> I'm not sure if it is worth the hassle, I bet some applications depend on that behavior.
> But you can give it a try, I'd insert a negative dentry for ".." if ".." is child of the current
> root.

Leaving aside the fact that .. handling does not depend on the corresponding
directory entry, why would such logics belong in the filesystem itself
anyway?  And not in the caller of ->lookup(), which *does* have all the
information needed.