From patchwork Fri Jul 3 15:57:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 11642199 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 47106912 for ; Fri, 3 Jul 2020 16:08:02 +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 1CBDE2145D for ; Fri, 3 Jul 2020 16:08:02 +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="o5NmlKwi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1CBDE2145D 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]:51346 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jrOEL-0003oK-6S for patchwork-qemu-devel@patchwork.kernel.org; Fri, 03 Jul 2020 12:08:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58956) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrO5j-0003JW-Ku; Fri, 03 Jul 2020 11:59:07 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:41616) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jrO5i-0007RR-02; Fri, 03 Jul 2020 11:59:07 -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=quDPSlunrrCmsJvyut+Ssrzu4WgMw45eo+aNiowNwG0=; b=o5NmlKwiY7em1dYq2ks6zE2DcSxLvTFrd6F9kMP+PChfgKu1NwL/L8zAUsb9HlRTUaN7EgbgDf0UvN+ki0faDQkP55eF/4HxMRt183pcniIMyrgqYl2YojuEYVZLRTTHXFj5s7JtrEbI590MQNbj5Ol3fZJAOuMjFFvNGjcAEXCPl+oflxPi3gsZl/j5048jzzqZIHJoYNUPbgKydAh1Ji00WkJ+jmhcWuunFOcz6CSXsOFsKOrw5SlEpT1dqhbR75W2VvTHTX3D6Tl7KB/465CGOfgRHQkwZLSQc0zV9CEdgz+4cs6hF1IvUFq2l4unzPsGMkgncDn7jSTWmt4mNA==; Received: from [81.0.49.0] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jrO5K-0001QQ-U8; Fri, 03 Jul 2020 17:58:42 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jrO51-0007Pf-Sg; Fri, 03 Jul 2020 17:58:23 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v10 11/34] qcow2: Add offset_into_subcluster() and size_to_subclusters() Date: Fri, 3 Jul 2020 17:57:57 +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 = 2020/07/03 11:21:00 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=_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+patchwork-qemu-devel=patchwork.kernel.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 Reviewed-by: Max Reitz --- block/qcow2.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/block/qcow2.h b/block/qcow2.h index 2503374677..4fe31adfd3 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;