From patchwork Sun May 24 14:51:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 1296858 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=KSwGNKlz; 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 49VNYF3YZbz9sRW for ; Mon, 25 May 2020 00:54:41 +1000 (AEST) Received: from localhost ([::1]:51222 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jcs1P-0005xt-4K for incoming@patchwork.ozlabs.org; Sun, 24 May 2020 10:54:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jcrzZ-0001h2-VV; Sun, 24 May 2020 10:52:45 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:37781) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jcrzX-0002kI-5L; Sun, 24 May 2020 10:52:45 -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=kbQL9LmZByGXU/l+CI8XcwAXUOKtIOhRYRMQ/s/0KYI=; b=KSwGNKlzQV/w/z8GGrC+FXUQASyrNhxUqcjfD6DX/ZWEkr7Df3z4iUed/r42xa32OKeLwq/kqsgdVdfu+Eh4ytxIGd09AfROB89N6pSqCMitddUkQ3lzmq+CVBSexaQ9Sq0xwR7m4QVmvrZsEIUHESlPRH0w1wO50p6Z1KfhfDYxhlRRWIKX/49gD2RUR4uoaDdd5pwzl3d77cEUIb3yUZGf1pZojKIkr2tVWj4nQY5hNT7wLsYOBj9ZESxerN2Sex3VfqIdPwOunHylUAwyB1kiNuOx5cmylVGAjXJz4v4BXhcaXv3SR8fGuAEgwr460Nx5GRZ/3af+5XDGIVwgyQ==; 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 1jcrz9-0007GI-8J; Sun, 24 May 2020 16:52:19 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jcryu-0005KI-U3; Sun, 24 May 2020 16:52:04 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v6 10/32] qcow2: Add offset_to_sc_index() Date: Sun, 24 May 2020 16:51:30 +0200 Message-Id: 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" 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 4e9c732831..ca73ac9b67 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);