From patchwork Thu Apr 20 07:52:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 752671 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3w7rjC3s44z9s65 for ; Thu, 20 Apr 2017 17:53:51 +1000 (AEST) Received: from localhost ([::1]:52094 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d16uT-00074u-2B for incoming@patchwork.ozlabs.org; Thu, 20 Apr 2017 03:53:49 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55185) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d16tj-0006ys-OA for qemu-devel@nongnu.org; Thu, 20 Apr 2017 03:53:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d16ti-0003IS-L3 for qemu-devel@nongnu.org; Thu, 20 Apr 2017 03:53:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53070) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d16tc-0003G3-TO; Thu, 20 Apr 2017 03:52:57 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CC50767AE7; Thu, 20 Apr 2017 07:52:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com CC50767AE7 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com CC50767AE7 Received: from lemon.redhat.com (ovpn-8-22.pek2.redhat.com [10.72.8.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6439D18B36; Thu, 20 Apr 2017 07:52:53 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Thu, 20 Apr 2017 15:52:20 +0800 Message-Id: <20170420075237.18219-4-famz@redhat.com> In-Reply-To: <20170420075237.18219-1-famz@redhat.com> References: <20170420075237.18219-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 20 Apr 2017 07:52:55 +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] [PATCH v13 03/20] block: Don't require BLK_PERM_CONSISTENT_READ when unsafe open 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, Max Reitz Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Fam Zheng --- block.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block.c b/block.c index f5182d8..ac0527a 100644 --- a/block.c +++ b/block.c @@ -2372,7 +2372,9 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, goto fail; } if (file_bs != NULL) { - file = blk_new(BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL); + file = blk_new(flags & BDRV_O_UNSAFE_READ ? + 0 : BLK_PERM_CONSISTENT_READ, + BLK_PERM_ALL); blk_insert_bs(file, file_bs, &local_err); bdrv_unref(file_bs); if (local_err) {