From patchwork Fri Jul 10 16:12:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 11657043 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A809313B1 for ; Fri, 10 Jul 2020 16:26:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7E98820657 for ; Fri, 10 Jul 2020 16:26:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="Ho4HACYg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E98820657 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=igalia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:43008 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jtvqf-0000X6-P9 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 10 Jul 2020 12:26:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42640) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jtvfN-000329-Be; Fri, 10 Jul 2020 12:14:25 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:43649) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jtvfI-0004vR-Iz; Fri, 10 Jul 2020 12:14:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=DWFzz4T+AhoA6h3Vs/ROK38xw63e6XfJbmyzdTE6EKY=; b=Ho4HACYg7NPW2YaJiZ48JQOVK8+Wfa6Ekfav7ab9rO/b9p5PC5heCNbIORnm2qvJW1bLwqSANC+O1u/rUl6V8dJ3qdPPz/sLVCvDpS+bjwy7t3++37d1eQiHDQHGyilP5jlzuIN048Qk3quTyPJv+qi7FuCaQTcna3+2/J3EznZESTxBzT2P4BP5Lm0gwV2iwkxgnELgcEFiRaYM9vKlYAwmBjG6yZ45Sf4mv6xEXTEKDEbZrRrZyBUgnJfquEV5FRMJQnPXtSGagfXaiQB8Kf0IhfitUxLbtDEiR7EMrxKvo46nXkHER7DwHYmaXdaEMVazoP9DX9pemNgm76VgBA==; Received: from [81.0.43.0] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jtvea-0003jd-9D; Fri, 10 Jul 2020 18:13:36 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jtveK-0001QU-SI; Fri, 10 Jul 2020 18:13:20 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v11 10/34] qcow2: Add offset_to_sc_index() Date: Fri, 10 Jul 2020 18:12:52 +0200 Message-Id: <56e3e4ac0d827c6a2f5f259106c5ddb7c4ca2653.1594396418.git.berto@igalia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=178.60.130.6; envelope-from=berto@igalia.com; helo=fanzine.igalia.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/10 12:13:35 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x (no timestamps) [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Vladimir Sementsov-Ogievskiy , Alberto Garcia , qemu-block@nongnu.org, Derek Su , Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" For a given offset, return the subcluster number within its cluster (i.e. with 32 subclusters per cluster it returns a number between 0 and 31). Signed-off-by: Alberto Garcia Reviewed-by: Max Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/qcow2.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/block/qcow2.h b/block/qcow2.h index eee4c8de9c..2503374677 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -581,6 +581,11 @@ static inline int offset_to_l2_slice_index(BDRVQcow2State *s, int64_t offset) return (offset >> s->cluster_bits) & (s->l2_slice_size - 1); } +static inline int offset_to_sc_index(BDRVQcow2State *s, int64_t offset) +{ + return (offset >> s->subcluster_bits) & (s->subclusters_per_cluster - 1); +} + static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s) { return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);