From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0089CA9EA1 for ; Fri, 18 Oct 2019 09:49:30 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A6EE5222BD for ; Fri, 18 Oct 2019 09:49:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A6EE5222BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37236 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLOsz-00084b-F9 for qemu-devel@archiver.kernel.org; Fri, 18 Oct 2019 05:49:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49150) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLOre-0006hZ-GK for qemu-devel@nongnu.org; Fri, 18 Oct 2019 05:48:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iLOrd-0005Z6-I1 for qemu-devel@nongnu.org; Fri, 18 Oct 2019 05:48:06 -0400 Received: from relay.sw.ru ([185.231.240.75]:42966) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iLOra-0005Wa-TL; Fri, 18 Oct 2019 05:48:03 -0400 Received: from [10.94.3.0] (helo=kvm.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.2) (envelope-from ) id 1iLOrX-0004Ah-94; Fri, 18 Oct 2019 12:47:59 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Subject: [PATCH v8 0/3] qcow2: add zstd cluster compression Date: Fri, 18 Oct 2019 12:47:55 +0300 Message-Id: <20191018094758.7124-1-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com, dplotnikov@virtuozzo.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi all! Here is my proposal, about how to correctly update qcow2 specification to introduce new field, keeping in mind currently existing images and downstream Qemu instances. v8: Add padding, and clarify "zero equals absence" concept. Move some points to commit message from the spec itself. Fix s/108/105 in 02 Vladimij Sementsov-Ogievskiy (3): docs: improve qcow2 spec about extending image header docs: define padding for qcow2 header docs: qcow2: introduce compression type feature docs/interop/qcow2.txt | 48 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 45 insertions(+), 3 deletions(-) -- 2.21.0