From patchwork Fri Oct 18 09:59:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Han Han X-Patchwork-Id: 11198051 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BDDA514ED for ; Fri, 18 Oct 2019 10:00:04 +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 9D2F0222BD for ; Fri, 18 Oct 2019 10:00:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D2F0222BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:37406 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLP3D-0006nI-MT for patchwork-qemu-devel@patchwork.kernel.org; Fri, 18 Oct 2019 06:00:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50793) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iLP2Q-0006He-BY for qemu-devel@nongnu.org; Fri, 18 Oct 2019 05:59:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iLP2N-0001Jw-Dl for qemu-devel@nongnu.org; Fri, 18 Oct 2019 05:59:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:29836) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iLP2N-0001JT-8S for qemu-devel@nongnu.org; Fri, 18 Oct 2019 05:59:11 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AC0943001FEB for ; Fri, 18 Oct 2019 09:59:08 +0000 (UTC) Received: from hansolo.pek2.redhat.com (wlc-trust-29.pek2.redhat.com [10.72.3.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1F7CA5D9CA; Fri, 18 Oct 2019 09:59:06 +0000 (UTC) From: Han Han To: qemu-devel@nongnu.org Subject: [PATCH] qemu-img.texi: Describe data_file and data_file_raw Date: Fri, 18 Oct 2019 17:59:24 +0800 Message-Id: <20191018095924.4409-1-hhan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Fri, 18 Oct 2019 09:59:08 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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: Han Han Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" https://bugzilla.redhat.com/show_bug.cgi?id=1763105 Signed-off-by: Han Han Reviewed-by: Eric Blake --- qemu-img.texi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/qemu-img.texi b/qemu-img.texi index b5156d6316..44596c2d93 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -763,6 +763,16 @@ file which is COW and has data blocks already, it couldn't be changed to NOCOW by setting @code{nocow=on}. One can issue @code{lsattr filename} to check if the NOCOW flag is set or not (Capital 'C' is NOCOW flag). +@item data_file +File name of data file that is stored in the image and used as a default for +opening the image. If the option is used, qcow2 file only stores the metadata +of the image. + +@item data_file_raw +This option requires @option{data_file}. If this option is set to @code{on}, +qemu will always keep the external data file consistent as a standalone +read-only raw image. Default value is @code{off}. + @end table @item Other