From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262153AbTLCVsQ (ORCPT ); Wed, 3 Dec 2003 16:48:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262188AbTLCVsL (ORCPT ); Wed, 3 Dec 2003 16:48:11 -0500 Received: from mail.fh-wedel.de ([213.39.232.194]:65438 "EHLO mail.fh-wedel.de") by vger.kernel.org with ESMTP id S262153AbTLCVsF (ORCPT ); Wed, 3 Dec 2003 16:48:05 -0500 Date: Wed, 3 Dec 2003 22:44:43 +0100 From: =?iso-8859-1?Q?J=F6rn?= Engel To: Kallol Biswas Cc: linux-kernel@vger.kernel.org, "linux-fsdevel@vger.kernel.org" Subject: Re: partially encrypted filesystem Message-ID: <20031203214443.GA23693@wohnheim.fh-wedel.de> References: <1070485676.4855.16.camel@nucleon> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1070485676.4855.16.camel@nucleon> User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 3 December 2003 13:07:56 -0800, Kallol Biswas wrote: > > Hello, > We have a requirement that a filesystem has to support > encryption based on some policy. The filesystem also should be able > to store data in non-encrypted form. A search on web shows a few > encrypted filesystems like "Crypto" from Suse Linux, but we need a > system where encryption will be a choice per file. We have a hardware > controller to apply encryption algorithm. If a filesystem provides hooks > to use a hardware controller to do the encryption work then the cpu can > be freed from doing the extra work. > > Any comment on this? Haven't heard about anything working yet, but it shouldn't be too hard to change something existing. For jffs2, I would guesstimate one or two month to add the necessary bits, but jffs2 is not first choice as a hard drive filesystem. Not sure about other filesystems. Jörn -- Geld macht nicht glücklich. Glück macht nicht satt.