[PULL,15/18] iotests: Refactor tests of parallels images checks (131)

diff --git a/tests/qemu-iotests/131 b/tests/qemu-iotests/131
index a847692b4c..601546c84c 100755
--- a/tests/qemu-iotests/131
+++ b/tests/qemu-iotests/131
@@ -44,31 +44,34 @@  _supported_os Linux
 inuse_offset=$((0x2c))
 
 size=$((64 * 1024 * 1024))
-CLUSTER_SIZE=64k
+CLUSTER_SIZE=$((64 * 1024))
 IMGFMT=parallels
 _make_test_img $size
 
+CLUSTER_HALF_SIZE=$((CLUSTER_SIZE / 2))
+CLUSTER_DBL_SIZE=$((CLUSTER_SIZE * 2))
+
 echo == read empty image ==
-{ $QEMU_IO -c "read -P 0 32k 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0 $CLUSTER_HALF_SIZE $CLUSTER_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == write more than 1 block in a row ==
-{ $QEMU_IO -c "write -P 0x11 32k 128k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "write -P 0x11 $CLUSTER_HALF_SIZE $CLUSTER_DBL_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == read less than block ==
-{ $QEMU_IO -c "read -P 0x11 32k 32k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0x11 $CLUSTER_HALF_SIZE $CLUSTER_HALF_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == read exactly 1 block ==
-{ $QEMU_IO -c "read -P 0x11 64k 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0x11 $CLUSTER_SIZE $CLUSTER_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == read more than 1 block ==
-{ $QEMU_IO -c "read -P 0x11 32k 128k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0x11 $CLUSTER_HALF_SIZE $CLUSTER_DBL_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == check that there is no trash after written ==
-{ $QEMU_IO -c "read -P 0 160k 32k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0 $((CLUSTER_HALF_SIZE + CLUSTER_DBL_SIZE)) $CLUSTER_HALF_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 echo == check that there is no trash before written ==
-{ $QEMU_IO -c "read -P 0 0 32k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0 0 $CLUSTER_HALF_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 
 echo "== Corrupt image =="
 poke_file "$TEST_IMG" "$inuse_offset" "\x59\x6e\x6f\x74"
-{ $QEMU_IO -c "read -P 0x11 64k 64k" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
+{ $QEMU_IO -c "read -P 0x11 $CLUSTER_SIZE $CLUSTER_SIZE" "$TEST_IMG"; } 2>&1 | _filter_qemu_io | _filter_testdir
 _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
+{ $QEMU_IO -c "read -P 0x11 $CLUSTER_SIZE $CLUSTER_SIZE" "$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.
@@ -83,7 +86,7 @@  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
+$QEMU_IO -c "write -P 42 0 $CLUSTER_SIZE" "$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
@@ -99,8 +102,8 @@  QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT \
 QEMU_IO_OPTIONS=$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))" \
+    -c "read -P 42 64 $((CLUSTER_SIZE - 64))" \
+    -c "read -P 0 $CLUSTER_SIZE $((size - CLUSTER_SIZE))" \
     | _filter_qemu_io
 
 # success, all done