From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-x229.google.com (mail-wi0-x229.google.com [IPv6:2a00:1450:400c:c05::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.server123.net (Postfix) with ESMTPS for ; Thu, 6 Aug 2015 11:15:29 +0200 (CEST) Received: by wibxm9 with SMTP id xm9so15144122wib.1 for ; Thu, 06 Aug 2015 02:15:27 -0700 (PDT) References: <55C3060B.6030206@freescale.com> From: Milan Broz Message-ID: <55C325AE.6070604@gmail.com> Date: Thu, 6 Aug 2015 11:15:26 +0200 MIME-Version: 1.0 In-Reply-To: <55C3060B.6030206@freescale.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [dm-crypt] out of order encryption List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Vasile Catalin-B50542 , dm-crypt@saout.de On 08/06/2015 09:00 AM, Vasile Catalin-B50542 wrote: > Would dm-crypt execute correctly if sector encryption ended asynchronously? > For example: > If sector 1, 2, 3 are sent to be done asynchronously to the same > algorithm instance, > and the jobs end in the following order: 2, 1, 3; does the dm-crypt > module know to > write the data in the proper place when the encryption "done" callback > is called? Not sure if I understand your question - encryption in dmcrypt works on sector level, sectors are encrypted independetly, so order cannot influence result of encryption of individual sectors. Or if the question is about order of submitted requests: If you need to ensure order of processing, you have to issue "flush" operation before submitting next data content. Filesystems typically must do this when handling journal or so. In general, requests order can be rearranged (anywhere in block layer, not only in dmcrypt). But this is correct behaviour. Milan