Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 23 Feb 2002 14:49:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 23 Feb 2002 14:49:10 -0500 Received: from petkele.almamedia.fi ([194.215.205.158]:904 "HELO petkele.almamedia.fi") by vger.kernel.org with SMTP id ; Sat, 23 Feb 2002 14:48:54 -0500 Message-ID: <3C77F1EC.27B32446@pp.inet.fi> Date: Sat, 23 Feb 2002 21:47:56 +0200 From: Jari Ruusu X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.2.20aa1 i686) X-Accept-Language: en MIME-Version: 1.0 To: mailerror@hushmail.com CC: linux-kernel@vger.kernel.org Subject: Re: loop under 2.2.20 - relative block support? In-Reply-To: <200202230132.g1N1WYJ27596@mailserver2.hushmail.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org mailerror@hushmail.com wrote: > What exactly is the status of the loopback device in 2.2.20 with regards > to relative block support? Is it *really* supported? > > The reason I am asking is that I've run into trouble retrieving data off > of a loopback file after I switched to a new machine. I was using loopback > in combination with the kerneli patch to mount an encrypted filesystem > and backup my data to it for safe transport to another machine. The > decryption seems to be largely successful, since I am able to see most of > the data when peering at the decrypted file using a hexeditor. Kerneli patches use block size dependant IV computation (also called "time bomb" IV). Shit hits the fan when you move files to a device with different block size. Search linux-crypto archives for more information. Regards, Jari Ruusu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/