From patchwork Fri Jul 3 15:57:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 278667 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F1ECC433DF for ; Fri, 3 Jul 2020 16:05:36 +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 ECF802070B for ; Fri, 3 Jul 2020 16:05:35 +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="H1bEvZ6j" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ECF802070B 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36764 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jrOBz-00060N-0x for qemu-devel@archiver.kernel.org; Fri, 03 Jul 2020 12:05:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59010) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrO5k-0003Md-Sc; Fri, 03 Jul 2020 11:59:08 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:41617) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jrO5i-0007RT-U9; Fri, 03 Jul 2020 11:59:08 -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=H1bEvZ6j+0OABgQJnaB+WbjncVX0PKsZTfrYYVF2wRO0BKcr/oC76hdIR8K81VlnlZ0hb9klNKlkUpCXYKH8XmxHGOLc5FcaU55cRcEeNyx9LhNJ4iqpYSZfRbV7ZNoX6muAQrLPbIP6zMAXZqoAfmqPZxELaxwfBR5ZTJgMr2QJWHlE0j45sSS9MEhDTM5IJNexXb0YSY5KHUcHQN30g5IfZcNlZwTX6ypMY5vR+zkrBu0aRiBvcAgJWXB/426Ap7y3RW2fkR6DXc++n4mzvVf8GfD87sICDo9+MvNQvoV2MTgeNTJkvUhoZMBoHcILF2AavVzdCfa3XWB9h6GqGw==; 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-0001QP-U2; Fri, 03 Jul 2020 17:58:43 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jrO51-0007Pd-RY; Fri, 03 Jul 2020 17:58:23 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v10 10/34] qcow2: Add offset_to_sc_index() Date: Fri, 3 Jul 2020 17:57:56 +0200 Message-Id: <376a7e6a0c33c52cfa8a1f89fa61fda11ed0fd79.1593791819.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 = 2020/07/03 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+qemu-devel=archiver.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);