From nobody Mon Feb 9 04:41:18 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1584470228; cv=none; d=zohomail.com; s=zohoarc; b=G9F3f+2ZZi9JCoQwxCb2GoFqI+8X/QbX1wj0Pr6rfIwNFx4REO1rMtDCti9BZtZiLEB+PPB2yVptP77Gvm0wxPwi6l4xJQBhY3GazEi5Su4myC/psG5p4Kh8LIKGUl1YNdwi9e8bIrrT2DOmmADK9X1RPR7PREeYQLKyK0wGIkw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1584470228; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=s7dRHxBO3oqeFHBCKa67pRvg2ir7e1CHI3jX0YPDL6A=; b=gOuSF/eFg1rqK4HcgpWbli5RNQytrnoY/XjVm0oB1EbqpaUcW8gBkJOTbFk0jVT6Q/fHnry6eIRqzKgfYeePfHRNl1HKYr0NzC8GiM2+Sbzb0aqwJegENO9+ID1IqvfwZQ5jrZdKDSPYt0TTJCPzNzMQMzd5El+AJ501/M3y1y0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1584470228329668.4713272695321; Tue, 17 Mar 2020 11:37:08 -0700 (PDT) Received: from localhost ([::1]:39486 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEH5P-0006Oh-9S for importer@patchew.org; Tue, 17 Mar 2020 14:37:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48824) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGmx-0003Sx-08 for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:18:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEGmu-000086-Tu for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:18:02 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:57999) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEGmu-0005xk-6Z; Tue, 17 Mar 2020 14:18:00 -0400 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 1jEGmD-000156-4G; Tue, 17 Mar 2020 19:17:17 +0100 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jEGlw-0006Op-Ry; Tue, 17 Mar 2020 19:17:00 +0100 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=s7dRHxBO3oqeFHBCKa67pRvg2ir7e1CHI3jX0YPDL6A=; b=hQTVEwlum3Sq6l/FFvFiETJzZQn+C2MQJUCN2MvxqTL0XagiRwaDizgDLYDBpEu3H3pg78M3z5Q/iTLvc8z2NkNtcvhkOvBObRrkn1vVudBepgu6l7teK/H+sZVy8+QT7rHGEJvU8YQ8GYVWVvDsqVhCRhc9vXRH5TjugzvbDu6Egyw6pPNU0GGO6I3QV+ANUa2szvK6ZsCIkvLTi1+In2tNlPqy/8+yngy6GuA+0edKa4Lgew5b49XSPSiIuMHcXQkilrS5QDKp8TTPHc5DV9i7T4bzQt2HACnldrM2gIjvEmb3vLgU5fMjgF7VHSqSaNOo9g/JDXCbuZkcgASIdg==; From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v4 24/30] qcow2: Clear the L2 bitmap when allocating a compressed cluster Date: Tue, 17 Mar 2020 19:16:21 +0100 Message-Id: <6d596d82ed62615a8565b661691a06bfaf32237e.1584468723.git.berto@igalia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Compressed clusters always have the bitmap part of the extended L2 entry set to 0. Signed-off-by: Alberto Garcia Reviewed-by: Max Reitz --- block/qcow2-cluster.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index dfd8b66958..1f471db98c 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -806,6 +806,9 @@ int qcow2_alloc_compressed_cluster_offset(BlockDriverSt= ate *bs, BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE_COMPRESSED); qcow2_cache_entry_mark_dirty(s->l2_table_cache, l2_slice); set_l2_entry(s, l2_slice, l2_index, cluster_offset); + if (has_subclusters(s)) { + set_l2_bitmap(s, l2_slice, l2_index, 0); + } qcow2_cache_put(s->l2_table_cache, (void **) &l2_slice); =20 *host_offset =3D cluster_offset & s->cluster_offset_mask; --=20 2.20.1