From patchwork Fri Nov 17 11:29:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 10062669 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C1E4460352 for ; Fri, 17 Nov 2017 11:30:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AAA7E2AC7B for ; Fri, 17 Nov 2017 11:30:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E0562AC85; Fri, 17 Nov 2017 11:30:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CE8C12AC7B for ; Fri, 17 Nov 2017 11:30:16 +0000 (UTC) Received: from localhost ([::1]:45294 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eFeqc-0003x6-W7 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 17 Nov 2017 06:30:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42097) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eFeq1-0003vU-9F for qemu-devel@nongnu.org; Fri, 17 Nov 2017 06:29:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eFepz-0003w8-M8 for qemu-devel@nongnu.org; Fri, 17 Nov 2017 06:29:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51386) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eFeps-0003s4-Mn; Fri, 17 Nov 2017 06:29:28 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2648D6A7DC; Fri, 17 Nov 2017 11:29:27 +0000 (UTC) Received: from t460.redhat.com (unknown [10.33.36.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id B5F8B83A65; Fri, 17 Nov 2017 11:29:23 +0000 (UTC) From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Fri, 17 Nov 2017 11:29:13 +0000 Message-Id: <20171117112913.21875-1-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 17 Nov 2017 11:29:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 (for-2.11)] qcow2: fix image corruption after committing qcow2 image into base X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP After committing the qcow2 image contents into the base image, qemu-img will call bdrv_make_empty to drop the payload in the layered image. When this is done for qcow2 images, it blows away the LUKS encryption header, making the resulting image unusable. There are two codepaths for emptying a qcow2 image, and the second (slower) codepath leaves the LUKS header intact, so force use of that codepath. Reviewed-by: Eric Blake Signed-off-by: Daniel P. Berrange --- block/qcow2.c | 6 +- tests/qemu-iotests/198 | 104 ++++++++++++++++++++++++++++++++ tests/qemu-iotests/198.out | 126 +++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/common.filter | 4 +- tests/qemu-iotests/group | 1 + 5 files changed, 238 insertions(+), 3 deletions(-) create mode 100755 tests/qemu-iotests/198 create mode 100644 tests/qemu-iotests/198.out diff --git a/block/qcow2.c b/block/qcow2.c index 92e5d548e3..e9a86b7443 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3601,12 +3601,14 @@ static int qcow2_make_empty(BlockDriverState *bs) l1_clusters = DIV_ROUND_UP(s->l1_size, s->cluster_size / sizeof(uint64_t)); if (s->qcow_version >= 3 && !s->snapshots && - 3 + l1_clusters <= s->refcount_block_size) { + 3 + l1_clusters <= s->refcount_block_size && + s->crypt_method_header != QCOW_CRYPT_LUKS) { /* The following function only works for qcow2 v3 images (it requires * the dirty flag) and only as long as there are no snapshots (because * it completely empties the image). Furthermore, the L1 table and three * additional clusters (image header, refcount table, one refcount - * block) have to fit inside one refcount block. */ + * block) have to fit inside one refcount block. It cannot be used + * for LUKS (yet) as it throws away the LUKS header cluster(s) */ return make_completely_empty(bs); } diff --git a/tests/qemu-iotests/198 b/tests/qemu-iotests/198 new file mode 100755 index 0000000000..34ef666381 --- /dev/null +++ b/tests/qemu-iotests/198 @@ -0,0 +1,104 @@ +#!/bin/bash +# +# Test commit of encrypted qcow2 files +# +# Copyright (C) 2017 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +# + +# creator +owner=berrange@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt qcow2 +_supported_proto generic +_supported_os Linux + + +size=16M +TEST_IMG_BASE=$TEST_IMG.base +SECRET0="secret,id=sec0,data=astrochicken" +SECRET1="secret,id=sec1,data=furby" + +TEST_IMG_SAVE=$TEST_IMG +TEST_IMG=$TEST_IMG_BASE +echo "== create base ==" +_make_test_img --object $SECRET0 -o "encrypt.format=luks,encrypt.key-secret=sec0,encrypt.iter-time=10" $size +TEST_IMG=$TEST_IMG_SAVE + +IMGSPECBASE="driver=$IMGFMT,file.filename=$TEST_IMG_BASE,encrypt.key-secret=sec0" +IMGSPECLAYER="driver=$IMGFMT,file.filename=$TEST_IMG,encrypt.key-secret=sec1" +IMGSPEC="$IMGSPECLAYER,backing.driver=$IMGFMT,backing.file.filename=$TEST_IMG_BASE,backing.encrypt.key-secret=sec0" +QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT + +echo +echo "== writing whole image base ==" +$QEMU_IO --object $SECRET0 -c "write -P 0xa 0 $size" --image-opts $IMGSPECBASE | _filter_qemu_io | _filter_testdir + +echo "== create overlay ==" +_make_test_img --object $SECRET1 -o "encrypt.format=luks,encrypt.key-secret=sec1,encrypt.iter-time=10" -u -b "$TEST_IMG_BASE" $size + +echo +echo "== writing whole image layer ==" +$QEMU_IO --object $SECRET0 --object $SECRET1 -c "write -P 0x9 0 $size" --image-opts $IMGSPEC | _filter_qemu_io | _filter_testdir + +echo +echo "== verify pattern base ==" +$QEMU_IO --object $SECRET0 -c "read -P 0xa 0 $size" --image-opts $IMGSPECBASE | _filter_qemu_io | _filter_testdir + +echo +echo "== verify pattern layer ==" +$QEMU_IO --object $SECRET0 --object $SECRET1 -c "read -P 0x9 0 $size" --image-opts $IMGSPEC | _filter_qemu_io | _filter_testdir + +echo +echo "== committing layer into base ==" +$QEMU_IMG commit --object $SECRET0 --object $SECRET1 --image-opts $IMGSPEC | _filter_testdir + +echo +echo "== verify pattern base ==" +$QEMU_IO --object $SECRET0 -c "read -P 0x9 0 $size" --image-opts $IMGSPECBASE | _filter_qemu_io | _filter_testdir + +echo +echo "== verify pattern layer ==" +$QEMU_IO --object $SECRET0 --object $SECRET1 -c "read -P 0x9 0 $size" --image-opts $IMGSPEC | _filter_qemu_io | _filter_testdir + +echo +echo "== checking image base ==" +$QEMU_IMG info --image-opts $IMGSPECBASE | _filter_img_info | _filter_testdir | sed -e "/^disk size:/ D" + +echo +echo "== checking image layer ==" +$QEMU_IMG info --image-opts $IMGSPECLAYER | _filter_img_info | _filter_testdir | sed -e "/^disk size:/ D" + + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/198.out b/tests/qemu-iotests/198.out new file mode 100644 index 0000000000..2db565e16b --- /dev/null +++ b/tests/qemu-iotests/198.out @@ -0,0 +1,126 @@ +QA output created by 198 +== create base == +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=16777216 encrypt.format=luks encrypt.key-secret=sec0 encrypt.iter-time=10 + +== writing whole image base == +wrote 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +== create overlay == +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=16777216 backing_file=TEST_DIR/t.IMGFMT.base encrypt.format=luks encrypt.key-secret=sec1 encrypt.iter-time=10 + +== writing whole image layer == +wrote 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify pattern base == +read 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify pattern layer == +read 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== committing layer into base == +Image committed. + +== verify pattern base == +read 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== verify pattern layer == +read 16777216/16777216 bytes at offset 0 +16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +== checking image base == +image: json:{"encrypt.key-secret": "sec0", "driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_DIR/t.IMGFMT.base"}} +file format: IMGFMT +virtual size: 16M (16777216 bytes) +Format specific information: + compat: 1.1 + lazy refcounts: false + refcount bits: 16 + encrypt: + ivgen alg: plain64 + hash alg: sha256 + cipher alg: aes-256 + uuid: 00000000-0000-0000-0000-000000000000 + format: luks + cipher mode: xts + slots: + [0]: + active: true + iters: 1024 + key offset: 4096 + stripes: 4000 + [1]: + active: false + key offset: 262144 + [2]: + active: false + key offset: 520192 + [3]: + active: false + key offset: 778240 + [4]: + active: false + key offset: 1036288 + [5]: + active: false + key offset: 1294336 + [6]: + active: false + key offset: 1552384 + [7]: + active: false + key offset: 1810432 + payload offset: 2068480 + master key iters: 1024 + corrupt: false + +== checking image layer == +image: json:{"encrypt.key-secret": "sec1", "driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_DIR/t.IMGFMT"}} +file format: IMGFMT +virtual size: 16M (16777216 bytes) +backing file: TEST_DIR/t.IMGFMT.base +Format specific information: + compat: 1.1 + lazy refcounts: false + refcount bits: 16 + encrypt: + ivgen alg: plain64 + hash alg: sha256 + cipher alg: aes-256 + uuid: 00000000-0000-0000-0000-000000000000 + format: luks + cipher mode: xts + slots: + [0]: + active: true + iters: 1024 + key offset: 4096 + stripes: 4000 + [1]: + active: false + key offset: 262144 + [2]: + active: false + key offset: 520192 + [3]: + active: false + key offset: 778240 + [4]: + active: false + key offset: 1036288 + [5]: + active: false + key offset: 1294336 + [6]: + active: false + key offset: 1552384 + [7]: + active: false + key offset: 1810432 + payload offset: 2068480 + master key iters: 1024 + corrupt: false +*** done diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter index 873ca6b104..d9237799e9 100644 --- a/tests/qemu-iotests/common.filter +++ b/tests/qemu-iotests/common.filter @@ -157,7 +157,9 @@ _filter_img_info() -e "/lazy_refcounts: \\(on\\|off\\)/d" \ -e "/block_size: [0-9]\\+/d" \ -e "/block_state_zero: \\(on\\|off\\)/d" \ - -e "/log_size: [0-9]\\+/d" + -e "/log_size: [0-9]\\+/d" \ + -e "s/iters: [0-9]\\+/iters: 1024/" \ + -e "s/uuid: [-a-f0-9]\\+/uuid: 00000000-0000-0000-0000-000000000000/" } # filter out offsets and file names from qemu-img map; good for both diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index 24e5ad1b79..83b839bbe3 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -194,3 +194,4 @@ 194 rw auto migration quick 195 rw auto quick 197 rw auto quick +198 rw auto