From nobody Sun Nov 2 12:04:14 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; 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 1527734216119442.8413406373212; Wed, 30 May 2018 19:36:56 -0700 (PDT) Received: from localhost ([::1]:41637 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fODSQ-0004J3-S7 for importer@patchew.org; Wed, 30 May 2018 22:36:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43304) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fODQf-0003MB-Pb for qemu-devel@nongnu.org; Wed, 30 May 2018 22:35:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fODQf-0001k0-0J for qemu-devel@nongnu.org; Wed, 30 May 2018 22:35:05 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:38366 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 1fODQd-0001jA-1E; Wed, 30 May 2018 22:35:03 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 992C44067F19; Thu, 31 May 2018 02:35:02 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-47.pek2.redhat.com [10.72.12.47]) by smtp.corp.redhat.com (Postfix) with ESMTP id E42F42023450; Thu, 31 May 2018 02:34:58 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Thu, 31 May 2018 10:34:44 +0800 Message-Id: <20180531023445.5923-2-famz@redhat.com> In-Reply-To: <20180531023445.5923-1-famz@redhat.com> References: <20180531023445.5923-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Thu, 31 May 2018 02:35:02 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Thu, 31 May 2018 02:35:02 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.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 1/2] block: Honour BDRV_REQ_NO_SERIALISING in copy range 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 , Fam Zheng , qemu-block@nongnu.org, Jeff Cody , Max Reitz , Stefan Hajnoczi 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" This semantics is needed by drive-backup so implement it before using this API there. Signed-off-by: Fam Zheng --- block/io.c | 6 ++++-- include/block/block.h | 5 +++-- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/block/io.c b/block/io.c index b7beaeeb9f..f55e0c39fe 100644 --- a/block/io.c +++ b/block/io.c @@ -2920,8 +2920,10 @@ int coroutine_fn bdrv_co_copy_range(BdrvChild *src, = uint64_t src_offset, tracked_request_begin(&dst_req, dst_bs, dst_offset, bytes, BDRV_TRACKED_WRITE); =20 - wait_serialising_requests(&src_req); - wait_serialising_requests(&dst_req); + if (!(flags & BDRV_REQ_NO_SERIALISING)) { + wait_serialising_requests(&src_req); + wait_serialising_requests(&dst_req); + } ret =3D bdrv_co_copy_range_from(src, src_offset, dst, dst_offset, bytes, flags); diff --git a/include/block/block.h b/include/block/block.h index 6cc6c7e699..6d3d156927 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -630,13 +630,14 @@ void bdrv_unregister_buf(BlockDriverState *bs, void *= host); * @dst: Destination child to copy data to * @dst_offset: offset in @dst image to write data * @bytes: number of bytes to copy - * @flags: request flags. Must be one of: - * 0 - actually read data from src; + * @flags: request flags. Supported flags: * BDRV_REQ_ZERO_WRITE - treat the @src range as zero data and do = zero * write on @dst as if bdrv_co_pwrite_zeroes= is * called. Used to simplify caller code, or * during BlockDriver.bdrv_co_copy_range_fro= m() * recursion. + * BDRV_REQ_NO_SERIALISING - do not serialize with other overlappi= ng + * requests currently in flight. * * Returns: 0 if succeeded; negative error code if failed. **/ --=20 2.14.3