From nobody Mon Apr 29 01:28:15 2024 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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1518154431845523.1613610864817; Thu, 8 Feb 2018 21:33:51 -0800 (PST) Received: from localhost ([::1]:37728 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1Jn-0007iG-2u for importer@patchew.org; Fri, 09 Feb 2018 00:33:51 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57498) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1Fh-0004zE-Jn for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ek1Fg-0003xL-El for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:37 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:50298 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ek1Fc-0003vx-JW; Fri, 09 Feb 2018 00:29:32 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 39F38813F6A5; Fri, 9 Feb 2018 05:29:32 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-69.pek2.redhat.com [10.72.12.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3EE48100839D; Fri, 9 Feb 2018 05:29:27 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 9 Feb 2018 13:29:13 +0800 Message-Id: <20180209052915.12855-2-famz@redhat.com> In-Reply-To: <20180209052915.12855-1-famz@redhat.com> References: <20180209052915.12855-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 09 Feb 2018 05:29:32 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 09 Feb 2018 05:29:32 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v7 1/3] qemu-img.texi: Clean up parameter list 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: Kevin Wolf , qemu-block@nongnu.org, kchamart@redhat.com, Max Reitz , stefanha@redhat.com 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" Split options out of the "@table @var" section and create a "@table @option", then use whitespaces and blank lines consistently. Suggested-by: Kevin Wolf Signed-off-by: Fam Zheng Reviewed-by: Kashyap Chamarthy Reviewed-by: Stefan Hajnoczi --- qemu-img.texi | 66 +++++++++++++++++++++++++++++++++++--------------------= ---- 1 file changed, 39 insertions(+), 27 deletions(-) diff --git a/qemu-img.texi b/qemu-img.texi index fdcf120f36..60a0e080c6 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -33,38 +33,14 @@ The following commands are supported: =20 Command parameters: @table @var + @item filename - is a disk image filename - -@item --object @var{objectdef} - -is a QEMU user creatable object definition. See the @code{qemu(1)} manual -page for a description of the object properties. The most common object -type is a @code{secret}, which is used to supply passwords and/or encrypti= on -keys. - -@item --image-opts - -Indicates that the source @var{filename} parameter is to be interpreted as= a -full option string, not a plain filename. This parameter is mutually -exclusive with the @var{-f} parameter. - -@item --target-image-opts - -Indicates that the @var{output_filename} parameter(s) are to be interprete= d as -a full option string, not a plain filename. This parameter is mutually -exclusive with the @var{-O} parameters. It is currently required to also u= se -the @var{-n} parameter to skip image creation. This restriction may be rel= axed -in a future release. +is a disk image filename =20 @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 -@item --backing-chain -will enumerate information about backing files in a disk image chain. Refer -below for further description. - @item size is the disk image size in bytes. Optional suffixes @code{k} or @code{K} (kilobyte, 1024) @code{M} (megabyte, 1024k) and @code{G} (gigabyte, 1024M) @@ -74,42 +50,78 @@ and T (terabyte, 1024G) are supported. @code{b} is ign= ored. is the destination disk image filename =20 @item output_fmt - is the destination format +is the destination format + @item options is a comma separated list of format specific options in a name=3Dvalue format. Use @code{-o ?} for an overview of the options suppor= ted by the used format or see the format descriptions below for details. + @item snapshot_param is param used for internal snapshot, format is 'snapshot.id=3D[ID],snapshot.name=3D[NAME]' or '[ID_OR_NAME]' + @item snapshot_id_or_name is deprecated, use snapshot_param instead =20 +@end table + +@table @option + +@item --object @var{objectdef} +is a QEMU user creatable object definition. See the @code{qemu(1)} manual +page for a description of the object properties. The most common object +type is a @code{secret}, which is used to supply passwords and/or encrypti= on +keys. + +@item --image-opts +Indicates that the source @var{filename} parameter is to be interpreted as= a +full option string, not a plain filename. This parameter is mutually +exclusive with the @var{-f} parameter. + +@item --target-image-opts +Indicates that the @var{output_filename} parameter(s) are to be interprete= d as +a full option string, not a plain filename. This parameter is mutually +exclusive with the @var{-O} parameters. It is currently required to also u= se +the @var{-n} parameter to skip image creation. This restriction may be rel= axed +in a future release. + +@item --backing-chain +will enumerate information about backing files in a disk image chain. Refer +below for further description. + @item -c indicates that target image must be compressed (qcow format only) + @item -h with or without a command shows help and lists the supported formats + @item -p display progress bar (compare, convert and rebase commands only). If the @var{-p} option is not used for a command that supports it, the progress is reported when the process receives a @code{SIGUSR1} or @code{SIGINFO} signal. + @item -q Quiet mode - do not print any output (except errors). There's no progress = bar in case both @var{-q} and @var{-p} options are used. + @item -S @var{size} indicates the consecutive number of bytes that must contain only zeros for qemu-img to create a sparse image during conversion. This value is rou= nded down to the nearest 512 bytes. You may use the common size suffixes like @code{k} for kilobytes. + @item -t @var{cache} specifies the cache mode that should be used with the (destination) file. = See the documentation of the emulator's @code{-drive cache=3D...} option for a= llowed values. + @item -T @var{src_cache} specifies the cache mode that should be used with the source file(s). See the documentation of the emulator's @code{-drive cache=3D...} option for a= llowed values. + @end table =20 Parameters to snapshot subcommand: --=20 2.14.3 From nobody Mon Apr 29 01:28:15 2024 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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 15181542866601002.207243303159; Thu, 8 Feb 2018 21:31:26 -0800 (PST) Received: from localhost ([::1]:37606 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1HJ-00062k-4f for importer@patchew.org; Fri, 09 Feb 2018 00:31:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57509) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1Fi-00050M-OL for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ek1Fh-0003xw-Qv for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:38 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:38216 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ek1Ff-0003x3-Oz; Fri, 09 Feb 2018 00:29:35 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5902D407604F; Fri, 9 Feb 2018 05:29:35 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-69.pek2.redhat.com [10.72.12.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id BDE0E100839D; Fri, 9 Feb 2018 05:29:32 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 9 Feb 2018 13:29:14 +0800 Message-Id: <20180209052915.12855-3-famz@redhat.com> In-Reply-To: <20180209052915.12855-1-famz@redhat.com> References: <20180209052915.12855-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Fri, 09 Feb 2018 05:29:35 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Fri, 09 Feb 2018 05:29:35 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v7 2/3] 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: Kevin Wolf , qemu-block@nongnu.org, kchamart@redhat.com, Max Reitz , stefanha@redhat.com 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" Signed-off-by: Fam Zheng Signed-off-by: Kevin Wolf Reviewed-by: Kashyap Chamarthy Reviewed-by: Stefan Hajnoczi --- qemu-img.texi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/qemu-img.texi b/qemu-img.texi index 60a0e080c6..8a26400adb 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -86,6 +86,14 @@ 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 in shared mode, allowing +other QEMU processes to open it in write mode. For example, this can be us= ed to +get the image information (with 'info' subcommand) when the image is used = by a +running guest. Note that this could produce inconsistent results because = of +concurrent metadata changes, etc. This option is only allowed when opening +images in read-only mode. + @item --backing-chain will enumerate information about backing files in a disk image chain. Refer below for further description. --=20 2.14.3 From nobody Mon Apr 29 01:28:15 2024 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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1518154433979499.83268608879575; Thu, 8 Feb 2018 21:33:53 -0800 (PST) Received: from localhost ([::1]:37718 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1Jk-0007ee-0h for importer@patchew.org; Fri, 09 Feb 2018 00:33:48 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57534) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ek1Fp-00058K-37 for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ek1Fo-00044x-56 for qemu-devel@nongnu.org; Fri, 09 Feb 2018 00:29:45 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:54728 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ek1Fi-0003y9-TI; Fri, 09 Feb 2018 00:29:38 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 796507D679; Fri, 9 Feb 2018 05:29:38 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-69.pek2.redhat.com [10.72.12.69]) by smtp.corp.redhat.com (Postfix) with ESMTP id DCFCC100839D; Fri, 9 Feb 2018 05:29:35 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 9 Feb 2018 13:29:15 +0800 Message-Id: <20180209052915.12855-4-famz@redhat.com> In-Reply-To: <20180209052915.12855-1-famz@redhat.com> References: <20180209052915.12855-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 09 Feb 2018 05:29:38 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 09 Feb 2018 05:29:38 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v7 3/3] docs: Document share-rw property more thoroughly 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: Kevin Wolf , qemu-block@nongnu.org, kchamart@redhat.com, Max Reitz , stefanha@redhat.com 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" Suggested-by: Stefan Hajnoczi Signed-off-by: Fam Zheng Reviewed-by: Kashyap Chamarthy Reviewed-by: Stefan Hajnoczi --- docs/qemu-block-drivers.texi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/qemu-block-drivers.texi b/docs/qemu-block-drivers.texi index cd74767ed3..f1793692bb 100644 --- a/docs/qemu-block-drivers.texi +++ b/docs/qemu-block-drivers.texi @@ -845,6 +845,16 @@ QEMU transparently handles lock handover during shared= storage migration. For shared virtual disk images between multiple VMs, the "share-rw" device opt= ion should be used. =20 +By default, the guest has exclusive write access to its disk image. If the +guest can safely share the disk image with other writers the @code{-device +...,share-rw=3Don} parameter can be used. This is only safe if the guest = is +running software, such as a cluster file system, that coordinates disk acc= esses +to avoid corruption. + +Note that share-rw=3Don only declares the guest's ability to share the dis= k. +Some QEMU features, such as image file formats, require exclusive write ac= cess +to the disk image and this is unaffected by the share-rw=3Don option. + Alternatively, locking can be fully disabled by "locking=3Doff" block devi= ce option. In the command line, the option is usually in the form of "file.locking=3Doff" as the protocol driver is normally placed as a "file"= child --=20 2.14.3