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[Qemu-devel] [PATCH v2 3/3] qemu-iotests: Add 041 backing file chain inf
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH v2 3/3] qemu-iotests: Add 041 backing file chain infinite loop test |
Date: |
Mon, 15 Oct 2012 14:44:17 +0200 |
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 <address@hidden>
---
tests/qemu-iotests/041 | 90 ++++++++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/041.out | 81 +++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/common.rc | 9 +++++
tests/qemu-iotests/group | 1 +
4 files changed, 181 insertions(+)
create mode 100755 tests/qemu-iotests/041
create mode 100644 tests/qemu-iotests/041.out
diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
new file mode 100755
index 0000000..839255f
--- /dev/null
+++ b/tests/qemu-iotests/041
@@ -0,0 +1,90 @@
+#!/bin/bash
+#
+# Test that qemu-img info --backing-chain detects infinite loops
+#
+# Copyright (C) 2012 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 <http://www.gnu.org/licenses/>.
+#
+
+# creator
address@hidden
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+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
+
+# Any format supporting backing files
+_supported_fmt qcow qcow2 vmdk qed
+_supported_proto generic
+_supported_os Linux
+
+
+size=128M
+_make_test_img $size
+$QEMU_IMG rebase -u -b $TEST_IMG $TEST_IMG
+
+echo
+echo "== backing file references self =="
+_img_info --backing-chain
+
+_make_test_img $size
+mv $TEST_IMG $TEST_IMG.base
+_make_test_img -b $TEST_IMG.base $size
+$QEMU_IMG rebase -u -b $TEST_IMG $TEST_IMG.base
+
+echo
+echo "== parent references self =="
+_img_info --backing-chain
+
+_make_test_img $size
+mv $TEST_IMG $TEST_IMG.1.base
+_make_test_img -b $TEST_IMG.1.base $size
+mv $TEST_IMG $TEST_IMG.2.base
+_make_test_img -b $TEST_IMG.2.base $size
+mv $TEST_IMG $TEST_IMG.3.base
+_make_test_img -b $TEST_IMG.3.base $size
+$QEMU_IMG rebase -u -b $TEST_IMG.2.base $TEST_IMG.1.base
+
+echo
+echo "== ancestor references another ancestor =="
+_img_info --backing-chain
+
+_make_test_img $size
+mv $TEST_IMG $TEST_IMG.1.base
+_make_test_img -b $TEST_IMG.1.base $size
+mv $TEST_IMG $TEST_IMG.2.base
+_make_test_img -b $TEST_IMG.2.base $size
+
+echo
+echo "== finite chain of length 3 =="
+_img_info --backing-chain
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/041.out b/tests/qemu-iotests/041.out
new file mode 100644
index 0000000..0c871b0
--- /dev/null
+++ b/tests/qemu-iotests/041.out
@@ -0,0 +1,81 @@
+QA output created by 041
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+
+== backing file references self ==
+qemu-img: Aborting due to backing file chain infinite loop.
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.base'
+
+== parent references self ==
+qemu-img: Aborting due to backing file chain infinite loop.
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.base
+
+image: TEST_DIR/t.IMGFMT.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.1.base'
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.2.base'
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.3.base'
+
+== ancestor references another ancestor ==
+qemu-img: Aborting due to backing file chain infinite loop.
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.3.base
+
+image: TEST_DIR/t.IMGFMT.3.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.2.base
+
+image: TEST_DIR/t.IMGFMT.2.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.1.base
+
+image: TEST_DIR/t.IMGFMT.1.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.2.base
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.1.base'
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
backing_file='TEST_DIR/t.IMGFMT.2.base'
+
+== finite chain of length 3 ==
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.2.base
+
+image: TEST_DIR/t.IMGFMT.2.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+backing file: TEST_DIR/t.IMGFMT.1.base
+
+image: TEST_DIR/t.IMGFMT.1.base
+file format: IMGFMT
+virtual size: 128M (134217728 bytes)
+cluster_size: 65536
+*** done
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index d534e94..aa80b5f 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -145,6 +145,15 @@ _check_test_img()
sed -e 's/qemu-img\: This image format does not support checks/No
errors were found on the image./'
}
+_img_info()
+{
+ $QEMU_IMG info "$@" $TEST_IMG | \
+ sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
+ -e "s#$TEST_DIR#TEST_DIR#g" \
+ -e "s#$IMGFMT#IMGFMT#g" \
+ -e "/^disk size:/ D" # ignore on-disk size, it can vary
+}
+
_get_pids_by_name()
{
if [ $# -ne 1 ]
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 66d2ba9..ee73b8d 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -47,3 +47,4 @@
038 rw auto backing
039 rw auto
040 rw auto
+041 rw auto backing
--
1.7.11.7