From patchwork Thu May 12 14:34:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 9082241 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5D6309F1C1 for ; Thu, 12 May 2016 14:46:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C4663201F4 for ; Thu, 12 May 2016 14:46:55 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 18E7A20034 for ; Thu, 12 May 2016 14:46:55 +0000 (UTC) Received: from localhost ([::1]:57926 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b0rt7-0004KU-WB for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 May 2016 10:46:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51727) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b0rj8-0005AO-Vm for qemu-devel@nongnu.org; Thu, 12 May 2016 10:36:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b0rj3-0003um-1f for qemu-devel@nongnu.org; Thu, 12 May 2016 10:36:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46418) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b0rir-0003qK-27; Thu, 12 May 2016 10:36:17 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 991656332F; Thu, 12 May 2016 14:36:16 +0000 (UTC) Received: from noname.redhat.com (ovpn-116-37.ams2.redhat.com [10.36.116.37]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4CEZp8u028730; Thu, 12 May 2016 10:36:15 -0400 From: Kevin Wolf To: qemu-block@nongnu.org Date: Thu, 12 May 2016 16:34:58 +0200 Message-Id: <1463063749-2201-19-git-send-email-kwolf@redhat.com> In-Reply-To: <1463063749-2201-1-git-send-email-kwolf@redhat.com> References: <1463063749-2201-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Thu, 12 May 2016 14:36:16 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 18/69] vmdk: Add vmdk_find_offset_in_cluster() 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: kwolf@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is a byte granularity version of vmdk_find_index_in_cluster(). Signed-off-by: Kevin Wolf Reviewed-by: Fam Zheng --- block/vmdk.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/block/vmdk.c b/block/vmdk.c index 45f9d3c..f1e01f9 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1259,15 +1259,26 @@ static VmdkExtent *find_extent(BDRVVmdkState *s, return NULL; } +static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, + int64_t offset) +{ + uint64_t offset_in_cluster, extent_begin_offset, extent_relative_offset; + uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; + + extent_begin_offset = + (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; + extent_relative_offset = offset - extent_begin_offset; + offset_in_cluster = extent_relative_offset % cluster_size; + + return offset_in_cluster; +} + static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent, int64_t sector_num) { - uint64_t index_in_cluster, extent_begin_sector, extent_relative_sector_num; - - extent_begin_sector = extent->end_sector - extent->sectors; - extent_relative_sector_num = sector_num - extent_begin_sector; - index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; - return index_in_cluster; + uint64_t offset; + offset = vmdk_find_offset_in_cluster(extent, sector_num * BDRV_SECTOR_SIZE); + return offset / BDRV_SECTOR_SIZE; } static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,