From nobody Thu Dec 18 13:19:11 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 1530589742881480.9807081694048; Mon, 2 Jul 2018 20:49:02 -0700 (PDT) Received: from localhost ([::1]:37652 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1faCJK-0005DY-66 for importer@patchew.org; Mon, 02 Jul 2018 23:49:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49285) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1faCHe-0004Tu-Dg for qemu-devel@nongnu.org; Mon, 02 Jul 2018 23:47:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1faCHd-0001nC-HN for qemu-devel@nongnu.org; Mon, 02 Jul 2018 23:47:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54214) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1faCHa-0001lG-3l; Mon, 02 Jul 2018 23:47:14 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1615830820DD; Tue, 3 Jul 2018 03:47:13 +0000 (UTC) Received: from localhost (ovpn-117-102.phx2.redhat.com [10.3.117.102]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C42DE60DB4; Tue, 3 Jul 2018 03:47:12 +0000 (UTC) From: Jeff Cody To: qemu-block@nongnu.org Date: Mon, 2 Jul 2018 23:46:54 -0400 Message-Id: <20180703034655.792039-3-jcody@redhat.com> In-Reply-To: <20180703034655.792039-1-jcody@redhat.com> References: <20180703034655.792039-1-jcody@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Tue, 03 Jul 2018 03:47:13 +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 2/3] 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: peter.maydell@linaro.org, Jeff Cody , Fam Zheng , qemu-devel@nongnu.org, 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" From: Fam Zheng This semantics is needed by drive-backup so implement it before using this API there. Reviewed-by: Stefan Hajnoczi Signed-off-by: Fam Zheng Message-id: 20180703023758.14422-3-famz@redhat.com Signed-off-by: Jeff Cody --- 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 b8845708d7..1a2272fad3 100644 --- a/block/io.c +++ b/block/io.c @@ -2930,8 +2930,10 @@ static int coroutine_fn bdrv_co_copy_range_internal(= BdrvChild *src, 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); + } if (recurse_src) { ret =3D src->bs->drv->bdrv_co_copy_range_from(src->bs, src, src_offset, diff --git a/include/block/block.h b/include/block/block.h index 2ffc1c64c6..e5c7759a0c 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -659,13 +659,14 @@ 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 2.17.1