From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 9EB0CC4727D for ; Thu, 24 Sep 2020 20:14:25 +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 C409723899 for ; Thu, 24 Sep 2020 20:14:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="T5n/kbVI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C409723899 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47350 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLXdH-000184-SG for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 16:14:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60372) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLXal-0008GN-Ur for qemu-devel@nongnu.org; Thu, 24 Sep 2020 16:11:48 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:41264) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLXaj-0003uS-1D for qemu-devel@nongnu.org; Thu, 24 Sep 2020 16:11:47 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600978301; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+tmVROCzkY+Kh2WMK4U9uKp7iP+U7o5K2T+DSCLoDQY=; b=T5n/kbVI3TJYgEnMCbHXLqp6m3GxeTOjt8Wb/6ZhRveAuk3BK6/iMJz4CdoEQpaVx3v89a CfNlNoYn/AxGlqK+rzwvZFaP+KqvvTxgxv+L/VIY78pHFrGID7+zhUEyqzt4jYlmO3MGgn 4K5/RBx1gUYEi11VZjt53Yn/ypLag7o= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-246-xm4YYgWLNzSzlAxGdb1qkg-1; Thu, 24 Sep 2020 16:11:39 -0400 X-MC-Unique: xm4YYgWLNzSzlAxGdb1qkg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A9E3C56BE2; Thu, 24 Sep 2020 20:11:37 +0000 (UTC) Received: from [10.3.114.148] (ovpn-114-148.phx2.redhat.com [10.3.114.148]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DB5845D9DD; Thu, 24 Sep 2020 20:11:33 +0000 (UTC) Subject: Re: [PATCH v7 4/5] block/io: fix bdrv_is_allocated_above To: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org References: <20200924194003.22080-1-vsementsov@virtuozzo.com> <20200924194003.22080-5-vsementsov@virtuozzo.com> From: Eric Blake Organization: Red Hat, Inc. Message-ID: Date: Thu, 24 Sep 2020 15:11:33 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200924194003.22080-5-vsementsov@virtuozzo.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.214, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no 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: fam@euphon.net, kwolf@redhat.com, Alberto Garcia , qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/24/20 2:40 PM, Vladimir Sementsov-Ogievskiy wrote: > bdrv_is_allocated_above wrongly handles short backing files: it reports > after-EOF space as UNALLOCATED which is wrong, as on read the data is > generated on the level of short backing file (if all overlays has s/has/have/ > unallocated area at that place). > > Reusing bdrv_common_block_status_above fixes the issue and unifies code > path. > > Signed-off-by: Vladimir Sementsov-Ogievskiy > Reviewed-by: Eric Blake > Reviewed-by: Alberto Garcia > --- > block/io.c | 43 +++++-------------------------------------- > 1 file changed, 5 insertions(+), 38 deletions(-) Nice diffstat, R-b remains in force. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org