From patchwork Wed Jun 10 15:03:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 280848 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=-9.5 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 6875CC433E0 for ; Wed, 10 Jun 2020 15:26:22 +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 380792063A for ; Wed, 10 Jun 2020 15:26:22 +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="Y6dzKxN5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 380792063A 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]:34484 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jj2cP-0001MO-Dw for qemu-devel@archiver.kernel.org; Wed, 10 Jun 2020 11:26:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36190) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jj2H4-0002pE-NX; Wed, 10 Jun 2020 11:04:19 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:58279) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jj2Gs-0006wr-Oa; Wed, 10 Jun 2020 11:04:16 -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=rYtb2FYfGO+eQGiZ0oQYJSWRUo7OpthnEHRNgAuR++M=; b=Y6dzKxN59T24mSf5AOCApQQw/jWrRhJJhMcGdeoxIUaAoUtttc23v5J3FzWVD9PejyOryH+gcq+Tab4N0/mXd50OoAAXjkp8/Vnrta4822KIpdwUr+l9V5lg/fGAwD3pKR8/YsmntCqnnU5+cXLVjQL77OOgKjcRdlqsrofKgk/PDH71Tkjo/RW5F/eD1h0LeNpksw3XG9r+sQvyOTiNR/+aer48UodZlw49lCF+DkqYJQ04+2QbIy+u04roccN5hEPeCjnZoLBy9SSgkBIfKUVBMio1V6dajj2oHjBJ0aSNEZJt3Di1uJfeDQd+QU/8mOp1ecUafIt7YiGXCBkGCQ==; Received: from [81.0.38.199] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1jj2GR-0007hA-OO; Wed, 10 Jun 2020 17:03:39 +0200 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jj2GC-0007NW-Ce; Wed, 10 Jun 2020 17:03:24 +0200 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v8 24/34] qcow2: Add subcluster support to check_refcounts_l2() Date: Wed, 10 Jun 2020 17:03:02 +0200 Message-Id: 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 = 2020/06/10 11:03:39 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 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" 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 770c5dbc83..696e4dad07 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 = active ? QCOW2_OL_ACTIVE_L2 : QCOW2_OL_INACTIVE_L2; - l2_entry = 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 = qcow2_pre_write_overlap_check(bs, ign, l2e_offset, l2_entry_size(s), false); if (ret < 0) {