From patchwork Sun May 24 14:51:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 1296879 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=igalia.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=igalia.com header.i=@igalia.com header.a=rsa-sha256 header.s=20170329 header.b=q31IQGj+; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 49VNp62GHJz9sRW for ; Mon, 25 May 2020 01:05:50 +1000 (AEST) Received: from localhost ([::1]:41756 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jcsCB-0000Rf-Ui for incoming@patchwork.ozlabs.org; Sun, 24 May 2020 11:05:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45858) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jcs00-00033F-TY; Sun, 24 May 2020 10:53:12 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:38075) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jcrzy-0002m3-0h; Sun, 24 May 2020 10:53:12 -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=XJ9+f7lurHYvBuTBC9J85Mjrkazyhzvj9xMgkShAYvQ=; b=q31IQGj+5ndzClRzXsYyiT8zms9AMrdKRbzntIv9otnIFuB12aYFFceJPo7VNDihBlUqb9Kf/WFTUElPMc3bujYE7PZyyVnFuhySA5+kENq7yb+QZE/vDTAKMtw3eH3k4w98r6EjAGDAxkS2Ev0getKFpR8sQg1By1YKaNFeGu8u53G2IizhH0dhXOn6h7EX0Am5r6cFvmVo18Hwwx8VIUQw3/pqT7kMm5Fd9bzOSc8i57ahe4tClHeCsy238lUZiyAtBZon5feSO+L3D+iHDcXNdmLPaD65Odgv+p+GU15h3uHVeuW67bVjjJ/pwJk3E7fvhnDoKtqx4g8DsHrVUQ==; Received: from [81.0.38.199] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jcrzF-0007GR-TV; Sun, 24 May 2020 16:52:26 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jcryu-0005KK-V7; Sun, 24 May 2020 16:52:04 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v6 11/32] qcow2: Add offset_into_subcluster() and size_to_subclusters() Date: Sun, 24 May 2020 16:51:31 +0200 Message-Id: <72cf411f89b5ccbf07d611bb33b418a875f1d475.1590331741.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 = 2020/05/24 10:52:20 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_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Like offset_into_cluster() and size_to_clusters(), but for subclusters. Signed-off-by: Alberto Garcia Reviewed-by: Eric Blake --- block/qcow2.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/block/qcow2.h b/block/qcow2.h index ca73ac9b67..79c4f82383 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -555,11 +555,21 @@ static inline int64_t offset_into_cluster(BDRVQcow2State *s, int64_t offset) return offset & (s->cluster_size - 1); } +static inline int64_t offset_into_subcluster(BDRVQcow2State *s, int64_t offset) +{ + return offset & (s->subcluster_size - 1); +} + static inline uint64_t size_to_clusters(BDRVQcow2State *s, uint64_t size) { return (size + (s->cluster_size - 1)) >> s->cluster_bits; } +static inline uint64_t size_to_subclusters(BDRVQcow2State *s, uint64_t size) +{ + return (size + (s->subcluster_size - 1)) >> s->subcluster_bits; +} + static inline int64_t size_to_l1(BDRVQcow2State *s, int64_t size) { int shift = s->cluster_bits + s->l2_bits;