qemu-iotests: Add 043 backing file chain infinite loop test
This new test verifies that qemu-img info --backing-chain safely aborts when an image file has a backing file infinite loop. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi
Kevin Wolf
parent
9699bf0d06
commit
514d9da5a9
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#!/bin/bash
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#
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# Test that qemu-img info --backing-chain detects infinite loops
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#
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# Copyright (C) 2012 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=stefanha@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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rm -f $TEST_IMG.[123].base
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# Any format supporting backing files
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_supported_fmt qcow qcow2 vmdk qed
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_supported_proto generic
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_supported_os Linux
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size=128M
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_make_test_img $size
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$QEMU_IMG rebase -u -b $TEST_IMG $TEST_IMG
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echo
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echo "== backing file references self =="
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_img_info --backing-chain
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_make_test_img $size
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mv $TEST_IMG $TEST_IMG.base
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_make_test_img -b $TEST_IMG.base $size
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$QEMU_IMG rebase -u -b $TEST_IMG $TEST_IMG.base
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echo
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echo "== parent references self =="
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_img_info --backing-chain
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_make_test_img $size
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mv $TEST_IMG $TEST_IMG.1.base
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_make_test_img -b $TEST_IMG.1.base $size
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mv $TEST_IMG $TEST_IMG.2.base
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_make_test_img -b $TEST_IMG.2.base $size
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mv $TEST_IMG $TEST_IMG.3.base
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_make_test_img -b $TEST_IMG.3.base $size
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$QEMU_IMG rebase -u -b $TEST_IMG.2.base $TEST_IMG.1.base
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echo
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echo "== ancestor references another ancestor =="
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_img_info --backing-chain
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_make_test_img $size
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mv $TEST_IMG $TEST_IMG.1.base
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_make_test_img -b $TEST_IMG.1.base $size
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mv $TEST_IMG $TEST_IMG.2.base
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_make_test_img -b $TEST_IMG.2.base $size
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echo
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echo "== finite chain of length 3 (human) =="
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_img_info --backing-chain
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echo
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echo "== finite chain of length 3 (json) =="
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_img_info --backing-chain --output=json
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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@ -0,0 +1,66 @@
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QA output created by 043
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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== backing file references self ==
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qemu-img: Backing file 'TEST_DIR/t.IMGFMT' creates an infinite loop.
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.base'
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== parent references self ==
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qemu-img: Backing file 'TEST_DIR/t.IMGFMT' creates an infinite loop.
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.1.base'
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.2.base'
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.3.base'
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== ancestor references another ancestor ==
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qemu-img: Backing file 'TEST_DIR/t.IMGFMT.2.base' creates an infinite loop.
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.1.base'
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR/t.IMGFMT.2.base'
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== finite chain of length 3 (human) ==
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image: TEST_DIR/t.IMGFMT
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file format: IMGFMT
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virtual size: 128M (134217728 bytes)
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cluster_size: 65536
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backing file: TEST_DIR/t.IMGFMT.2.base
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image: TEST_DIR/t.IMGFMT.2.base
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file format: IMGFMT
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virtual size: 128M (134217728 bytes)
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cluster_size: 65536
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backing file: TEST_DIR/t.IMGFMT.1.base
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image: TEST_DIR/t.IMGFMT.1.base
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file format: IMGFMT
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virtual size: 128M (134217728 bytes)
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cluster_size: 65536
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== finite chain of length 3 (json) ==
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[
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{
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.IMGFMT",
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"cluster-size": 65536,
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"format": "IMGFMT",
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"backing-filename": "TEST_DIR/t.IMGFMT.2.base",
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"dirty-flag": false
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},
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{
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.IMGFMT.2.base",
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"cluster-size": 65536,
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"format": "IMGFMT",
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"backing-filename": "TEST_DIR/t.IMGFMT.1.base",
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"dirty-flag": false
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},
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{
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"virtual-size": 134217728,
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"filename": "TEST_DIR/t.IMGFMT.1.base",
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"cluster-size": 65536,
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"format": "IMGFMT",
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"dirty-flag": false
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}
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]
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*** done
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@ -145,6 +145,16 @@ _check_test_img()
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sed -e 's/qemu-img\: This image format does not support checks/No errors were found on the image./'
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}
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_img_info()
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{
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$QEMU_IMG info "$@" $TEST_IMG 2>&1 | \
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sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
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-e "s#$TEST_DIR#TEST_DIR#g" \
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-e "s#$IMGFMT#IMGFMT#g" \
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-e "/^disk size:/ D" \
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-e "/actual-size/ D"
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}
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_get_pids_by_name()
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{
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if [ $# -ne 1 ]
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@ -48,3 +48,4 @@
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039 rw auto
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040 rw auto
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042 rw auto quick
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043 rw auto backing
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