From nobody Sun Feb 8 23:41:58 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=1584469641; cv=none; d=zohomail.com; s=zohoarc; b=OBxEZCMeVN7mqR1veNA33vT6rB4XN3liliYMR+8PQms9Yu91ZvGnxJYlchPBd6+JyDl+LgzF6aDGRABVPhX6b0WOcK1rpFEg1ssKbwWMeGwF6ykGZxV84glyC4EfyulKbEdi7LZtS457/m5uLqrplQVI1Vs9ccq4Niv1SQIoPKY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1584469641; 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=hxp55E9JUt56NLfwt7oK+Qjm0FNoUMZxhVIeDlCQuSw=; b=cBnFyLlPdbpaHP8XqjAvIJBB1GqZJqs8Ysa7iQ207qXOL68iBdD5TLGuLmKzJCY64GmSKmMVTMZG6WxbSka72KhuTd+Qah3okojby09SOGGUxi7OdYHQ0hh9H7qX4LQQdRFsgVsaa0ulopXiSePEqsYNi8t20yDyJLn8R92m8vs= 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 1584469641908566.3329903113522; Tue, 17 Mar 2020 11:27:21 -0700 (PDT) Received: from localhost ([::1]:39156 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGvw-0000TQ-RN for importer@patchew.org; Tue, 17 Mar 2020 14:27:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48832) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGmx-0003TS-AQ 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 1jEGmv-000097-5T for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:18:03 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:58015) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEGmu-0005yG-4U; 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-00015Y-48; Tue, 17 Mar 2020 19:17:17 +0100 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jEGlw-0006Ot-U4; 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=hxp55E9JUt56NLfwt7oK+Qjm0FNoUMZxhVIeDlCQuSw=; b=ZxQ1KWUydvc5RQVXn4Iqu7OnVYcvAuhOC90senR0rMEDbNCs2d7iZJdYAr7TPXyC1nSDBgvkgVdkerh6/rodF/cRcmPACOySSroLqyHaK3PBE1QlDMSu7DZGj64h3XKFuo7k790SAEY9PzBB4KaVq5EX/Wbtnv7zOTgZqb6/Ma+ILnR3wttFX9S0ioObK1v2CPTAO/TSHk8KeOgMO6HN5x52B0G3lKdHFW7A9IK0xLvmoUeUUIN5HBT7bG6yyjn7IsnjxHd8fh8yG6Q2Qs0KcTzHJ21VFaSiY0UdLgrHaYYC1M/NTb+6LV68sgNfbIp1j2PKVBAmJwdvbXTP0PgNmA==; From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v4 26/30] qcow2: Restrict qcow2_co_pwrite_zeroes() to full clusters only Date: Tue, 17 Mar 2020 19:16:23 +0100 Message-Id: <1415552fc60acc658e3f80751d9ecd63da2b863d.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" Ideally it should be possible to zero individual subclusters using this function, but this is currently not implemented. Signed-off-by: Alberto Garcia Reviewed-by: Max Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/qcow2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/qcow2.c b/block/qcow2.c index ad230ed1b1..d406ef355b 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3743,7 +3743,9 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockD= riverState *bs, bytes =3D s->cluster_size; nr =3D s->cluster_size; ret =3D qcow2_get_host_offset(bs, offset, &nr, &off, &type); - if (ret < 0 || + /* TODO: allow zeroing separate subclusters, we only allow + * zeroing full clusters at the moment. */ + if (ret < 0 || nr !=3D bytes || (type !=3D QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN && type !=3D QCOW2_SUBCLUSTER_UNALLOCATED_ALLOC && type !=3D QCOW2_SUBCLUSTER_ZERO_PLAIN && --=20 2.20.1