From nobody Fri Nov 14 17:03:00 2025 Delivered-To: importer@patchew.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=1588701536; cv=none; d=zohomail.com; s=zohoarc; b=Tw1Wad/DNciTZIbPdzbUe590BZ0g7p3mFsuw8qKSgMS7F9HoonHPwSPVPW1ogTI3zo3TpwKbZKMWTEwt6iwRDQ5D9L+RB4EEYh5fLk2/R+WPCe6kNAhRlEZqK1GP8ctdysM76QVCg1iuwRnN0GTa3yJ8jODhIfc4PXd38Z1RSXA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1588701536; 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=rbPei7ohkRF9a0MpkV3DC+v51wP8iLw1G1e6jaebNZU=; b=kNjkwtOoQyua6b2k8OsUaCY6hMT1qmyiFcSWFoMjAAvSvU+RWxTtoMMYfn5ZPJv6MqTybvvV5NoRKNDc3ruMH8VQG+rTS15qzLfisktbIIAxLMKcLCQ1Ur3sJUMZ88zmngInPtithBAACX9A7Z8umFz8a4PCz7ueQq71fvhkMEk= 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 15887015366461014.2625918587871; Tue, 5 May 2020 10:58:56 -0700 (PDT) Received: from localhost ([::1]:48192 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jW1qJ-0002r6-Fi for importer@patchew.org; Tue, 05 May 2020 13:58:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44146) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jW1Xo-00070w-Sc; Tue, 05 May 2020 13:39:48 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:39068) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jW1Xd-0008Qt-Nv; Tue, 05 May 2020 13:39:47 -0400 Received: from static.160.43.0.81.ibercom.com ([81.0.43.160] helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jW1Ws-00025W-Fs; Tue, 05 May 2020 19:38:50 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jW1Wd-00044a-6K; Tue, 05 May 2020 19:38:35 +0200 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=rbPei7ohkRF9a0MpkV3DC+v51wP8iLw1G1e6jaebNZU=; b=fWzMOkHiF46iZcd3sT8mWd4hD+yLqRc0Gd3EEz1cpOkqU/6YAIljmGLNZTBT95gK+nhLXVkiGcn8iiTEX+ggEP2Xy5/cvqMpQx19MIKv9ZfIPcQztRD3vv4jThJo3Hg3CjlxEOoS1e/dzoyA9QGbtOcyG6oJG5FowsITjA/zbs6X2+Gy4Nxz4KCRwh4V8TUSKUStyJyOX3VZESAR4zeUgbspi4pKCagbzICFwFjiID2bShQxAsJo5HRBm3bz2P9JG30o09eQKq+Rnn5tpcz5/zu8jwNGngtAMc1vYnVC8d9wO1W8I3HkpBd5e8ezXFn0PxQSZs0lgVgPjQI3G1FKYA==; From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v5 23/31] qcow2: Add subcluster support to check_refcounts_l2() Date: Tue, 5 May 2020 19:38:23 +0200 Message-Id: <659488f9bf4bf0291191f3d426a5567698924084.1588699789.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 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; 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 = 2020/05/05 13:38:50 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_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, Max Reitz 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" Setting the QCOW_OFLAG_ZERO bit of the L2 entry is forbidden if an image has subclusters. Instead, the individual 'all zeroes' bits must be used. Signed-off-by: Alberto Garcia Reviewed-by: Max Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake --- block/qcow2-refcount.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index dfdcdd3c25..9bb161481e 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -1686,8 +1686,13 @@ static int check_refcounts_l2(BlockDriverState *bs, = BdrvCheckResult *res, int ign =3D active ? QCOW2_OL_ACTIVE_L2 : QCOW2_OL_INACTIVE_L2; =20 - l2_entry =3D QCOW_OFLAG_ZERO; - set_l2_entry(s, l2_table, i, l2_entry); + if (has_subclusters(s)) { + set_l2_entry(s, l2_table, i, 0); + set_l2_bitmap(s, l2_table, i, + QCOW_L2_BITMAP_ALL_ZEROES); + } else { + set_l2_entry(s, l2_table, i, QCOW_OFLAG_ZERO); + } ret =3D qcow2_pre_write_overlap_check(bs, ign, l2e_offset, l2_entry_size(s), false); if (ret < 0) { --=20 2.20.1