From patchwork Fri Apr 15 03:27:53 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 8844541 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6DAB0C0553 for ; Fri, 15 Apr 2016 03:28:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D4E6720373 for ; Fri, 15 Apr 2016 03:28:44 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 38508202F0 for ; Fri, 15 Apr 2016 03:28:44 +0000 (UTC) Received: from localhost ([::1]:52790 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquR1-0004BB-Ip for patchwork-qemu-devel@patchwork.kernel.org; Thu, 14 Apr 2016 23:28:43 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53966) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquQg-00041n-CH for qemu-devel@nongnu.org; Thu, 14 Apr 2016 23:28:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aquQf-000329-Ek for qemu-devel@nongnu.org; Thu, 14 Apr 2016 23:28:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49077) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aquQb-00031I-4H; Thu, 14 Apr 2016 23:28:17 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C4B8E62652; Fri, 15 Apr 2016 03:28:16 +0000 (UTC) Received: from lemon.nay.redhat.com (dhcp-14-170.nay.redhat.com [10.66.14.170]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3F3S2RM008188; Thu, 14 Apr 2016 23:28:13 -0400 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 15 Apr 2016 11:27:53 +0800 Message-Id: <1460690887-32751-4-git-send-email-famz@redhat.com> In-Reply-To: <1460690887-32751-1-git-send-email-famz@redhat.com> References: <1460690887-32751-1-git-send-email-famz@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 15 Apr 2016 03:28:16 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH for-2.7 v2 03/17] blockdev: Add and parse "lock-image" option for block devices 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, Jeff Cody , Markus Armbruster , Max Reitz , den@openvz.org, pbonzini@redhat.com, John Snow Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Honor the locking switch specified in CLI or QMP, and set the open flags for the image accordingly. Signed-off-by: Fam Zheng --- blockdev.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/blockdev.c b/blockdev.c index f1f520a..93bd43e 100644 --- a/blockdev.c +++ b/blockdev.c @@ -382,6 +382,10 @@ static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, return; } } + + if (!qemu_opt_get_bool(opts, "lock-image", false)) { + *bdrv_flags |= BDRV_O_NO_LOCK; + } } /* disk I/O throttling */ @@ -4249,6 +4253,10 @@ QemuOptsList qemu_common_drive_opts = { .type = QEMU_OPT_BOOL, .help = "whether to account for failed I/O operations " "in the statistics", + },{ + .name = "lock-image", + .type = QEMU_OPT_BOOL, + .help = "whether to lock the image (default: on)", }, { /* end of list */ } },