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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 491CEC433FF for ; Tue, 30 Jul 2019 18:11:23 +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 1FF402089E for ; Tue, 30 Jul 2019 18:11:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1FF402089E 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]:35526 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsWao-0007Cg-4A for qemu-devel@archiver.kernel.org; Tue, 30 Jul 2019 14:11:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42363) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsWa8-0006ie-AY for qemu-devel@nongnu.org; Tue, 30 Jul 2019 14:10:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hsWa7-0004HU-7j for qemu-devel@nongnu.org; Tue, 30 Jul 2019 14:10:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47412) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hsWa3-0004ET-1m; Tue, 30 Jul 2019 14:10:36 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A2E9787633; Tue, 30 Jul 2019 18:10:33 +0000 (UTC) Received: from [10.3.116.93] (ovpn-116-93.phx2.redhat.com [10.3.116.93]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C9A5119C65; Tue, 30 Jul 2019 18:10:32 +0000 (UTC) To: Max Reitz , qemu-block@nongnu.org References: <20190730172508.19911-1-mreitz@redhat.com> <20190730172508.19911-6-mreitz@redhat.com> From: Eric Blake Openpgp: preference=signencrypt Autocrypt: addr=eblake@redhat.com; keydata= xsBNBEvHyWwBCACw7DwsQIh0kAbUXyqhfiKAKOTVu6OiMGffw2w90Ggrp4bdVKmCaEXlrVLU xphBM8mb+wsFkU+pq9YR621WXo9REYVIl0FxKeQo9dyQBZ/XvmUMka4NOmHtFg74nvkpJFCD TUNzmqfcjdKhfFV0d7P/ixKQeZr2WP1xMcjmAQY5YvQ2lUoHP43m8TtpB1LkjyYBCodd+LkV GmCx2Bop1LSblbvbrOm2bKpZdBPjncRNob73eTpIXEutvEaHH72LzpzksfcKM+M18cyRH+nP sAd98xIbVjm3Jm4k4d5oQyE2HwOur+trk2EcxTgdp17QapuWPwMfhaNq3runaX7x34zhABEB AAHNHkVyaWMgQmxha2UgPGVibGFrZUByZWRoYXQuY29tPsLAegQTAQgAJAIbAwULCQgHAwUV CgkICwUWAgMBAAIeAQIXgAUCS8fL9QIZAQAKCRCnoWtKJSdDahBHCACbl/5FGkUqJ89GAjeX RjpAeJtdKhujir0iS4CMSIng7fCiGZ0fNJCpL5RpViSo03Q7l37ss+No+dJI8KtAp6ID+PMz wTJe5Egtv/KGUKSDvOLYJ9WIIbftEObekP+GBpWP2+KbpADsc7EsNd70sYxExD3liwVJYqLc Rw7so1PEIFp+Ni9A1DrBR5NaJBnno2PHzHPTS9nmZVYm/4I32qkLXOcdX0XElO8VPDoVobG6 gELf4v/vIImdmxLh/w5WctUpBhWWIfQDvSOW2VZDOihm7pzhQodr3QP/GDLfpK6wI7exeu3P pfPtqwa06s1pae3ad13mZGzkBdNKs1HEm8x6zsBNBEvHyWwBCADGkMFzFjmmyqAEn5D+Mt4P zPdO8NatsDw8Qit3Rmzu+kUygxyYbz52ZO40WUu7EgQ5kDTOeRPnTOd7awWDQcl1gGBXgrkR pAlQ0l0ReO57Q0eglFydLMi5bkwYhfY+TwDPMh3aOP5qBXkm4qIYSsxb8A+i00P72AqFb9Q7 3weG/flxSPApLYQE5qWGSXjOkXJv42NGS6o6gd4RmD6Ap5e8ACo1lSMPfTpGzXlt4aRkBfvb NCfNsQikLZzFYDLbQgKBA33BDeV6vNJ9Cj0SgEGOkYyed4I6AbU0kIy1hHAm1r6+sAnEdIKj cHi3xWH/UPrZW5flM8Kqo14OTDkI9EtlABEBAAHCwF8EGAEIAAkFAkvHyWwCGwwACgkQp6Fr SiUnQ2q03wgAmRFGDeXzc58NX0NrDijUu0zx3Lns/qZ9VrkSWbNZBFjpWKaeL1fdVeE4TDGm I5mRRIsStjQzc2R9b+2VBUhlAqY1nAiBDv0Qnt+9cLiuEICeUwlyl42YdwpmY0ELcy5+u6wz mK/jxrYOpzXKDwLq5k4X+hmGuSNWWAN3gHiJqmJZPkhFPUIozZUCeEc76pS/IUN72NfprZmF Dp6/QDjDFtfS39bHSWXKVZUbqaMPqlj/z6Ugk027/3GUjHHr8WkeL1ezWepYDY7WSoXwfoAL 2UXYsMAr/uUncSKlfjvArhsej0S4zbqim2ZY6S8aRWw94J3bSvJR+Nwbs34GPTD4Pg== Organization: Red Hat, Inc. Message-ID: <4027fac6-1faa-6eae-e66e-0f6edaf653b6@redhat.com> Date: Tue, 30 Jul 2019 13:10:31 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190730172508.19911-6-mreitz@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="MPkVjhrFnZ3pjZBXneutuqxyIr0J4c9fr" X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 30 Jul 2019 18:10:33 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH for-4.2 05/13] qcow2: Write v3-compliant snapshot list on upgrade 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 , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --MPkVjhrFnZ3pjZBXneutuqxyIr0J4c9fr Content-Type: multipart/mixed; boundary="5J0uztkeDwmeoa4y91jUad83kyFALv44P"; protected-headers="v1" From: Eric Blake To: Max Reitz , qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, Kevin Wolf Message-ID: <4027fac6-1faa-6eae-e66e-0f6edaf653b6@redhat.com> Subject: Re: [PATCH for-4.2 05/13] qcow2: Write v3-compliant snapshot list on upgrade References: <20190730172508.19911-1-mreitz@redhat.com> <20190730172508.19911-6-mreitz@redhat.com> In-Reply-To: <20190730172508.19911-6-mreitz@redhat.com> --5J0uztkeDwmeoa4y91jUad83kyFALv44P Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 7/30/19 12:25 PM, Max Reitz wrote: > qcow2 v3 requires every snapshot table entry to have two extra data > fields: The 64-bit VM state size, and the virtual disk size. Both are > optional for v2 images, so they may not be present. >=20 > qcow2_upgrade() therefore should update the snapshot table to ensure al= l > entries have these extra data fields. >=20 > Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=3D1727347 > Reported-by: Eric Blake > Signed-off-by: Max Reitz > --- > block/qcow2.c | 29 +++++++++++++++++++++++++++-- > 1 file changed, 27 insertions(+), 2 deletions(-) >=20 > + > + /* > + * In v2, snapshots do not need to have extra data. v3 requires > + * the 64-bit VM state size and the virtual disk size to be > + * present. > + * qcow2_write_snapshots() will always write the list in the > + * v3-compliant format. > + */ > + need_snapshot_update =3D false; > + for (i =3D 0; i < s->nb_snapshots; i++) { > + if (s->snapshots[i].extra_data_size < 16) { s/16/sizeof(extra)/ looks a bit nicer, but doesn't change semantics. Reviewed-by: Eric Blake --=20 Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org --5J0uztkeDwmeoa4y91jUad83kyFALv44P-- --MPkVjhrFnZ3pjZBXneutuqxyIr0J4c9fr Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEccLMIrHEYCkn0vOqp6FrSiUnQ2oFAl1AiBcACgkQp6FrSiUn Q2pEewf/csmVvynBtnWLyZiHuTulJfmgTmvK8aK8lAEQi0pMRFXJ3MxAZJtiFlBV /N26pLriclcOl0/ZaqAEEe1QUMI1XUXynPnlhYG3RbAuh32/mObULvIrrDUYrEHT h+JhKLXRGSisoA5boOXxwAM0ElBGcbMpfVYP1hstUYNSoLNy42bd5mwY8POUYZXv MmRdlqS6Cil9FvERYYWiisrwN+rQCmbumvtav+EIaKRgjK3egdNg+8qUZTpa+EnY L11WrTqvPOEVKK1oBaGfWrL9VeAUf04Y/7WudMOS+hLTKLQ7sl5bHk8kQCNu2awu 1OCev+inqFdzeL/vvCXnmB7+8na4mA== =0jGR -----END PGP SIGNATURE----- --MPkVjhrFnZ3pjZBXneutuqxyIr0J4c9fr--