From nobody Wed Dec 17 05:40:52 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1513776647580804.5314104623624; Wed, 20 Dec 2017 05:30:47 -0800 (PST) Received: from localhost ([::1]:51493 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eReSH-0005PX-GC for importer@patchew.org; Wed, 20 Dec 2017 08:30:41 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56075) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eReIG-0004sR-Te for qemu-devel@nongnu.org; Wed, 20 Dec 2017 08:20:22 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eReIA-0006bV-HL for qemu-devel@nongnu.org; Wed, 20 Dec 2017 08:20:20 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35986) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eReI3-0006OP-Gn; Wed, 20 Dec 2017 08:20:07 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 96FCDC04B928; Wed, 20 Dec 2017 13:20:06 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-116-136.ams2.redhat.com [10.36.116.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 318D85C8A4; Wed, 20 Dec 2017 13:20:02 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Date: Wed, 20 Dec 2017 14:19:35 +0100 Message-Id: <20171220131939.27543-11-kwolf@redhat.com> In-Reply-To: <20171220131939.27543-1-kwolf@redhat.com> References: <20171220131939.27543-1-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 20 Dec 2017 13:20:06 +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 Subject: [Qemu-devel] [PULL 10/14] qemu-img: Document --force-share / -U X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Fam Zheng Signed-off-by: Fam Zheng Reviewed-by: Stefan Hajnoczi Reviewed-by: Kashyap Chamarthy Signed-off-by: Kevin Wolf --- qemu-img.texi | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/qemu-img.texi b/qemu-img.texi index fdcf120f36..bc24565ae9 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -57,6 +57,15 @@ exclusive with the @var{-O} parameters. It is currently = required to also use the @var{-n} parameter to skip image creation. This restriction may be rel= axed in a future release. =20 +@item --force-share (-U) + +If specified, @code{qemu-img} will open the image with shared permissions, +which makes it less likely to conflict with a running guest's permissions = due +to image locking. For example, this can be used to get the image informati= on +(with 'info' subcommand) when the image is used by a running guest. Note t= hat +this could produce inconsistent results because of concurrent metadata cha= nges, +etc. This option is only allowed when opening images in read-only mode. + @item fmt is the disk image format. It is guessed automatically in most cases. See b= elow for a description of the supported disk formats. --=20 2.13.6