From nobody Wed Feb 11 02:54:51 2026 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 1528438032417438.2581544510077; Thu, 7 Jun 2018 23:07:12 -0700 (PDT) Received: from localhost ([::1]:33292 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fRAYJ-0001PP-IM for importer@patchew.org; Fri, 08 Jun 2018 02:07:11 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42065) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fRAWU-0000Sr-EL for qemu-devel@nongnu.org; Fri, 08 Jun 2018 02:05:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fRAWT-0008Vq-FN for qemu-devel@nongnu.org; Fri, 08 Jun 2018 02:05:18 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37786 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 1fRAWO-0008U9-VH; Fri, 08 Jun 2018 02:05:13 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 909A78151D42; Fri, 8 Jun 2018 06:05:12 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-108.pek2.redhat.com [10.72.12.108]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA6B71C641; Fri, 8 Jun 2018 06:05:08 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 8 Jun 2018 14:04:16 +0800 Message-Id: <20180608060417.10170-6-famz@redhat.com> In-Reply-To: <20180608060417.10170-1-famz@redhat.com> References: <20180608060417.10170-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 08 Jun 2018 06:05:12 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Fri, 08 Jun 2018 06:05:12 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.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 5/6] block: Add backing passthrough implementations for 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" Similar to bdrv_co_block_status_from_backing we add the two passthrough callbacks for copy_range. This will be used by the block driver filters so that they can support copy offloading. Signed-off-by: Fam Zheng --- block/io.c | 24 ++++++++++++++++++++++++ include/block/block_int.h | 22 ++++++++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/block/io.c b/block/io.c index d8039793c2..d1559c9cd5 100644 --- a/block/io.c +++ b/block/io.c @@ -1900,6 +1900,30 @@ int coroutine_fn bdrv_co_block_status_from_backing(B= lockDriverState *bs, return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } =20 +int coroutine_fn bdrv_co_copy_range_from_backing(BlockDriverState *bs, + BdrvChild *src, uint64_t = src_offset, + BdrvChild *dst, uint64_t = dst_offset, + uint64_t bytes, BdrvReque= stFlags flags) +{ + if (!src->bs) { + return -ENOMEDIUM; + } + return bdrv_co_copy_range_from(src->bs->backing, src_offset, dst, + dst_offset, bytes, flags); +} + +int coroutine_fn bdrv_co_copy_range_to_backing(BlockDriverState *bs, + BdrvChild *src, uint64_t sr= c_offset, + BdrvChild *dst, uint64_t ds= t_offset, + uint64_t bytes, BdrvRequest= Flags flags) +{ + if (!dst->bs) { + return -ENOMEDIUM; + } + return bdrv_co_copy_range_to(src, src_offset, dst->bs->backing, + dst_offset, bytes, flags); +} + /* * Returns the allocation status of the specified sectors. * Drivers not implementing the functionality are assumed to not support diff --git a/include/block/block_int.h b/include/block/block_int.h index 2c51cd420f..b488d74c1b 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -1118,6 +1118,28 @@ int coroutine_fn bdrv_co_block_status_from_backing(B= lockDriverState *bs, int64_t *pnum, int64_t *map, BlockDriverState **file= ); + +/* + * Default implementation for drivers to pass bdrv_co_copy_range_from() to + * their backing file. + */ +int coroutine_fn bdrv_co_copy_range_from_backing(BlockDriverState *bs, + BdrvChild *src, uint64_t = src_offset, + BdrvChild *dst, uint64_t = dst_offset, + uint64_t bytes, + BdrvRequestFlags flags); + + +/* + * Default implementation for drivers to pass bdrv_co_copy_range_to() to t= heir + * backing file. + */ +int coroutine_fn bdrv_co_copy_range_to_backing(BlockDriverState *bs, + BdrvChild *src, uint64_t sr= c_offset, + BdrvChild *dst, uint64_t ds= t_offset, + uint64_t bytes, + BdrvRequestFlags flags); + const char *bdrv_get_parent_name(const BlockDriverState *bs); void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp); bool blk_dev_has_removable_media(BlockBackend *blk); --=20 2.17.0