From patchwork Tue Mar 17 18:16:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 11443721 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 1E7231668 for ; Tue, 17 Mar 2020 18:19:04 +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 B534E20674 for ; Tue, 17 Mar 2020 18:19:03 +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="QaumKjhq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B534E20674 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]:38934 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGnu-0004ny-M2 for patchwork-qemu-devel@patchwork.kernel.org; Tue, 17 Mar 2020 14:19:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48312) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGmb-0002oH-0b for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:17:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEGmZ-0007Uz-43 for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:17:40 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:57717) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEGmX-0005Uw-Ak; Tue, 17 Mar 2020 14:17:38 -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=zla0Gbao2cB2emUOI/Sszge/VnY7U5+RKi4/QZftaFk=; b=QaumKjhqjuPTZ949r3CPye3ac7psL8MeHJQEwTbb1In6TWywk/l8tE6J/KVUo+lvPzHm3AQhckSNIKigLMc2SW8i8kohSBRE6KjV6Z5xdVAuyeDrsFQ7WmJhP7QBKL4xbtXlbRriwhZpoF+IK7fVIlhH0jfCFIHs6dFSxQdS4zmXuUmxOhjysh74zmDQxtdHMhfkNbaX99Wr1BxY/SRhOS3Z27L7UE7eW8xS5TcVEJ64pIDHFVLOdjmVIU3ds+MJb8k4gwDEcVJzt2xm3GJmCrHPO85sUeulF5t7DMwIzQfqTeuOlaYyo2vk9G7enLmRxmaFW8s45ghNt4hsT5eOTA==; Received: from [81.0.35.138] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jEGmC-00015W-QR; Tue, 17 Mar 2020 19:17:16 +0100 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jEGlw-0006ON-CG; Tue, 17 Mar 2020 19:17:00 +0100 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v4 10/30] qcow2: Add offset_to_sc_index() Date: Tue, 17 Mar 2020 19:16:07 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] [fuzzy] X-Received-From: 178.60.130.6 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 , Anton Nefedov , Alberto Garcia , qemu-block@nongnu.org, Max Reitz , Vladimir Sementsov-Ogievskiy , "Denis V . Lunev" 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 3052b14dc0..06929072d2 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -566,6 +566,11 @@ 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);