From patchwork Sun Dec 22 11:37:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 11307385 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 422DF13A4 for ; Sun, 22 Dec 2019 11:49:50 +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 1760F2053B for ; Sun, 22 Dec 2019 11:49:50 +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="c4pph57Q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1760F2053B 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]:46834 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iizk4-0007bU-N6 for patchwork-qemu-devel@patchwork.kernel.org; Sun, 22 Dec 2019 06:49:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:43682) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iizZ8-0003Lj-UX for qemu-devel@nongnu.org; Sun, 22 Dec 2019 06:38:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iizZ7-0006ng-KF for qemu-devel@nongnu.org; Sun, 22 Dec 2019 06:38:30 -0500 Received: from fanzine.igalia.com ([178.60.130.6]:34971) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iizZ7-0004Ur-8u; Sun, 22 Dec 2019 06:38:29 -0500 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=8ovRW+9TPD4268Z3Rpebx38DdbkpGyk/zhXsYbm5FYM=; b=c4pph57QMDwzk4sUF1xgi1WOw5cM9BvGF3klLFzCWHu+S3fw7JOwiOTaiz5+2OlN+Rz2oaRz1DNYlBaRs4Y0KumlHr0Zh2md7Peby1FwpDy8UUjP6zf6IqJhHNtSVMEQbcYimTwCqifEuCuxNSMWVc7oLdMHQO/rwQvoKdX7S44UulruorsP+vPBtgA+8uyjkf89vrtjxzPGATcHEYOrFmy5VtUVIUxeY5y3J2msTy846uokFZdZYmdmPMPikpwbSnWU239wE8aquH4Be76MvRKTBr8uiurZcZIOV7LPe8Rrar6m4kKnuG7ZgTFSlvnI3KWJwNWlxcqod7+snZLOQA==; Received: from [80.30.182.172] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1iizYV-0005dO-0L; Sun, 22 Dec 2019 12:37:51 +0100 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1iizXu-0001WE-Sx; Sun, 22 Dec 2019 12:37:14 +0100 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [RFC PATCH v3 22/27] qcow2: Clear the L2 bitmap when allocating a compressed cluster Date: Sun, 22 Dec 2019 12:37:03 +0100 Message-Id: <410dd2fcfc6d0a177e3aea669cbc8f665f0df20a.1577014346.git.berto@igalia.com> 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" 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 ed291a4042..af0f01621c 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -789,6 +789,9 @@ int qcow2_alloc_compressed_cluster_offset(BlockDriverState *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); *host_offset = cluster_offset & s->cluster_offset_mask;