linux-ext4 - Re: [PATCH v3] fscrypt: add a documentation file for filesystem-level encryption

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Message-ID: <20171009203333.GC67463@gmail.com>
Date:   Mon, 9 Oct 2017 13:33:33 -0700
From:   Eric Biggers <ebiggers3@...il.com>
To:     Theodore Ts'o <tytso@....edu>, linux-fscrypt@...r.kernel.org
Cc:     linux-doc@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, Eric Biggers <ebiggers@...gle.com>
Subject: Re: [PATCH v3] fscrypt: add a documentation file for
 filesystem-level encryption

On Fri, Sep 08, 2017 at 05:15:12PM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> Perhaps long overdue, add a documentation file for filesystem-level
> encryption, a.k.a. fscrypt or fs/crypto/, to the Documentation
> directory.  The new file is based loosely on the latest version of the
> "EXT4 Encryption Design Document (public version)" Google Doc, but with
> many improvements made, including:
> 
> - Reflect the reality that it is not specific to ext4 anymore.
> - More thoroughly document the design and user-visible API/behavior.
> - Replace outdated information, such as the outdated explanation of how
>   encrypted filenames are hashed for indexed directories and how
>   encrypted filenames are presented to userspace without the key.
>   (This was changed just before release.)
> 
> For now the focus is on the design and user-visible API/behavior, not on
> how to add encryption support to a filesystem --- since the internal API
> is still pretty messy and any standalone documentation for it would
> become outdated as things get refactored over time.
> 
> Reviewed-by: Michael Halcrow <mhalcrow@...gle.com>

Ted, are you interested in taking this through the fscrypt tree for v4.15?

Eric