1 files changed, 96 insertions, 0 deletions
diff --git a/tests/qemu-iotests/043 b/tests/qemu-iotests/043
new file mode 100755
index 000000000..f8ce3288d
--- /dev/null
+++ b/tests/qemu-iotests/043
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+# group: rw auto backing
+#
+# 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
+owner=stefanha@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+status=1	# failure is the default!
+
+_cleanup()
+{
+    _cleanup_test_img
+    for img in "$TEST_IMG".[123].base; do
+        _rm_test_img "$img"
+    done
+}
+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 qcow2 qed
+_supported_proto file
+
+
+size=128M
+_make_test_img $size
+$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$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" -F $IMGFMT $size
+$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$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" -F $IMGFMT $size
+mv "$TEST_IMG" "$TEST_IMG.2.base"
+_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size
+mv "$TEST_IMG" "$TEST_IMG.3.base"
+_make_test_img -b "$TEST_IMG.3.base" -F $IMGFMT $size
+$QEMU_IMG rebase -u -b "$TEST_IMG.2.base" -F $IMGFMT "$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" -F $IMGFMT $size
+mv "$TEST_IMG" "$TEST_IMG.2.base"
+_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size
+
+echo
+echo "== finite chain of length 3 (human) =="
+# Exclude backing format, since qed differs from qcow2 on what gets stored
+_img_info --backing-chain | grep -v '^backing file format:'
+
+echo
+echo "== finite chain of length 3 (json) =="
+_img_info --backing-chain --output=json | grep -v 'backing-filename-format'
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0