From patchwork Tue Mar 17 18:16:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alberto Garcia X-Patchwork-Id: 11443765 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 C139B13B1 for ; Tue, 17 Mar 2020 18:30:07 +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 96DA920714 for ; Tue, 17 Mar 2020 18:30:07 +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="WYjpzvM7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96DA920714 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]:39302 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGyc-00063P-NA for patchwork-qemu-devel@patchwork.kernel.org; Tue, 17 Mar 2020 14:30:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48682) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEGmt-0003LK-GX for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:18:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEGms-0008U4-En for qemu-devel@nongnu.org; Tue, 17 Mar 2020 14:17:59 -0400 Received: from fanzine.igalia.com ([178.60.130.6]:57705) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEGms-0005Ut-5D; Tue, 17 Mar 2020 14:17:58 -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=oWauXz47PpW+xVTM/4Ib2FZL1+ZMSwNIBOfuc4avzAI=; b=WYjpzvM73Lgs5SQe1qRRYChrWddCJt7O19zP1KdeOkjdxCo2Za00xelT0D3jJPyEG+c8rULlL/Cmbk11q5nwkbKaYY/nH9uNrHH5XWgo3B23FQrGCfJ5jV9ZdFZzbUxi7AKmhKSY2b2lSJzdBHwLOUUXbf1GBkLHbZHrROSqoQr1QDGprXdzAVOohkHEVPpCGSFFafRbzpwDWv53pQRGkg5LS1zyXmzbPF3N/y7cM/sjGHcL2Dt5Q5EoOySWNBg8dL5vWoDj4nAcTHpBdrdnqd+IW4Z4iBipAt9p5M79J6wPSKxLymu9+/8tZzw27KkHoF0W3XIp4LsRABKA6LdV8w==; 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-00015c-0i; Tue, 17 Mar 2020 19:17:17 +0100 Received: from berto by perseus.local with local (Exim 4.92) (envelope-from ) id 1jEGlw-0006Oj-OL; Tue, 17 Mar 2020 19:17:00 +0100 From: Alberto Garcia To: qemu-devel@nongnu.org Subject: [PATCH v4 21/30] qcow2: Add subcluster support to check_refcounts_l2() Date: Tue, 17 Mar 2020 19:16:18 +0100 Message-Id: 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" 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 --- 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 3b89a97fd0..9337496c84 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) {