linux-ext4 - Dot and dotdot need to be physically present?

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Message-Id: <200808131636.59436.phillips@phunq.net>
Date:	Wed, 13 Aug 2008 16:36:59 -0700
From:	Daniel Phillips <phillips@...nq.net>
To:	linux-ext4@...r.kernel.org
Cc:	Theodore Tso <tytso@....edu>
Subject: Dot and dotdot need to be physically present?

Hi Ted,

Many years ago we had a discussion about whether or not the . and ..
directory entries had to be physically present in htree, and I remember
the conclusion was that they had to be, but I forget the argument and
lost track of the email thread.  I think the VFS will happily supply
the . and .. entries to getdents on its own.  So what was the issue?
Something about telldir?

This is in relation to implementing a cleaner successor to htree that
could end up being useful to Ext4 and Lustre as well as Tux3.  See
"phtree" here:

   http://tux3.org/design.html

Regards,

Daniel

p.s. Wow, you still have your MIT email.  There must be a war story.
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