diff options
Diffstat (limited to 'tests/qemu-iotests/131')
| -rwxr-xr-x | tests/qemu-iotests/131 | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/tests/qemu-iotests/131 b/tests/qemu-iotests/131 index d7456cae5b..a847692b4c 100755 --- a/tests/qemu-iotests/131 +++ b/tests/qemu-iotests/131 @@ -43,7 +43,7 @@ _supported_os Linux inuse_offset=$((0x2c)) -size=64M +size=$((64 * 1024 * 1024)) CLUSTER_SIZE=64k IMGFMT=parallels _make_test_img $size @@ -70,6 +70,39 @@ _check_test_img _check_test_img -r all { $QEMU_IO -c "read -P 0x11 64k 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir +echo "== allocate with backing ==" +# Verify that allocating clusters works fine even when there is a backing image. +# Regression test for a bug where we would pass a buffer read from the backing +# node as a QEMUIOVector object, which could cause anything from I/O errors over +# assertion failures to invalid reads from memory. + +# Clear image +_make_test_img $size +# Create base image +TEST_IMG="$TEST_IMG.base" _make_test_img $size + +# Write some data to the base image (which would trigger an assertion failure if +# interpreted as a QEMUIOVector) +$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG.base" | _filter_qemu_io + +# Parallels does not seem to support storing a backing filename in the image +# itself, so we need to build our backing chain on the command line +imgopts="driver=$IMGFMT,file.driver=$IMGPROTO,file.filename=$TEST_IMG" +imgopts+=",backing.driver=$IMGFMT" +imgopts+=",backing.file.driver=$IMGPROTO,backing.file.filename=$TEST_IMG.base" + +# Cause allocation in the top image +QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT \ + $QEMU_IO --image-opts "$imgopts" -c 'write -P 1 0 64' | _filter_qemu_io + +# Verify +QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT \ + $QEMU_IO --image-opts "$imgopts" \ + -c 'read -P 1 0 64' \ + -c "read -P 42 64 $((64 * 1024 - 64))" \ + -c "read -P 0 64k $((size - 64 * 1024))" \ + | _filter_qemu_io + # success, all done echo "*** done" rm -f $seq.full |