From patchwork Thu Mar 29 11:09:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 10315011 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7DF9A6037E for ; Thu, 29 Mar 2018 11:17:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8007424603 for ; Thu, 29 Mar 2018 11:17:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 74AD92A245; Thu, 29 Mar 2018 11:17:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 16CAD2A216 for ; Thu, 29 Mar 2018 11:17:01 +0000 (UTC) Received: from localhost ([::1]:41990 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f1VYC-0007vF-4f for patchwork-qemu-devel@patchwork.kernel.org; Thu, 29 Mar 2018 07:17:00 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60783) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f1VRQ-0001nM-MT for qemu-devel@nongnu.org; Thu, 29 Mar 2018 07:10:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f1VRP-0003IE-NO for qemu-devel@nongnu.org; Thu, 29 Mar 2018 07:10:00 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:58466 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 1f1VRJ-0003Gj-GC; Thu, 29 Mar 2018 07:09:53 -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 2E16240201A7; Thu, 29 Mar 2018 11:09:53 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-85.pek2.redhat.com [10.72.12.85]) by smtp.corp.redhat.com (Postfix) with ESMTP id C22172024CA4; Thu, 29 Mar 2018 11:09:49 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Thu, 29 Mar 2018 19:09:12 +0800 Message-Id: <20180329110914.20888-7-famz@redhat.com> In-Reply-To: <20180329110914.20888-1-famz@redhat.com> References: <20180329110914.20888-1-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 [10.11.55.6]); Thu, 29 Mar 2018 11:09:53 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Thu, 29 Mar 2018 11:09:53 +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] [RFC PATCH 6/8] raw: Implement raw_co_map_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, Max Reitz , Stefan Hajnoczi , pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Because raw can be seen as a "passthrough" format, its implementation of bdrv_co_map_range is exactly the same as bdrv_co_block_status. The BDRV_REQ_ALLOCATE flag can be ignored because no metadata update is necessary. Signed-off-by: Fam Zheng --- block/raw-format.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/block/raw-format.c b/block/raw-format.c index a378547c99..95e81af22d 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -263,6 +263,14 @@ static int coroutine_fn raw_co_block_status(BlockDriverState *bs, return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID; } +static int coroutine_fn raw_co_map_range(BlockDriverState *bs, int64_t offset, + int64_t bytes, int64_t *pnum, int64_t *map, + BlockDriverState **file, + int flags) +{ + return raw_co_block_status(bs, true, offset, bytes, pnum, map, file); +} + static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, BdrvRequestFlags flags) @@ -498,6 +506,7 @@ BlockDriver bdrv_raw = { .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes, .bdrv_co_pdiscard = &raw_co_pdiscard, .bdrv_co_block_status = &raw_co_block_status, + .bdrv_co_map_range = &raw_co_map_range, .bdrv_truncate = &raw_truncate, .bdrv_getlength = &raw_getlength, .has_variable_length = true,