linux-ext4 - Atomic file data replace API

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Message-ID: <AANLkTi=qpQfwZ1vfRjKE063tVvbz0VLmroO_kkvz+N+-@mail.gmail.com>
Date:	Mon, 27 Dec 2010 12:51:54 +0100
From:	Olaf van der Spek <olafvdspek@...il.com>
To:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-ext4@...r.kernel.org
Subject: Atomic file data replace API

Hi,

Since non-durable appears to be controversial, let's consider the case
without that aspect.

Since the introduction of ext4, some apps/users have had issues with
file corruption after a system crash. It's not a bug in the FS AFAIK
and it's not exclusive to ext4.
Writing a temp file, fsync, rename is often proposed.
But how does one preserve meta-data, including file owner?

Olaf
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