[PATCH 15/18] iotests: Make 137 work with data_file

[Max Reitz <mreitz@redhat.com>]

When using an external data file, there are no refcounts for data
clusters.  We thus have to adjust the corruption test in this patch to
not be based around a data cluster allocation, but the L2 table
allocation (L2 tables are still refcounted with external data files).

Doing so means this test works both with and without external data
files.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/137     | 10 ++++++----
 tests/qemu-iotests/137.out |  4 +---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tests/qemu-iotests/137 b/tests/qemu-iotests/137
index 6cf2997577..dd3484205e 100755
--- a/tests/qemu-iotests/137
+++ b/tests/qemu-iotests/137
@@ -138,14 +138,16 @@ $QEMU_IO \
     "$TEST_IMG" 2>&1 | _filter_qemu_io
 
 # The dirty bit must not be set
-$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
+# (Filter the external data file bit)
+$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features \
+    | sed -e 's/0x4/0x0/'
 
 # Similarly we can test whether corruption detection has been enabled:
-# Create L1/L2, overwrite first entry in refcount block, allocate something.
+# Create L1, overwrite refcounts, force allocation of L2 by writing
+# data.
 # Disabling the checks should fail, so the corruption must be detected.
 _make_test_img 64M
-$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
-poke_file "$TEST_IMG" "$((0x20000))" "\x00\x00"
+poke_file "$TEST_IMG" "$((0x20000))" "\x00\x00\x00\x00\x00\x00\x00\x00"
 $QEMU_IO \
     -c "reopen -o overlap-check=none,lazy-refcounts=42" \
     -c "write 64k 64k" \
diff --git a/tests/qemu-iotests/137.out b/tests/qemu-iotests/137.out
index 1c6569eb2c..bd5f76d604 100644
--- a/tests/qemu-iotests/137.out
+++ b/tests/qemu-iotests/137.out
@@ -38,9 +38,7 @@ wrote 512/512 bytes at offset 0
 ./common.rc: Killed                  ( VALGRIND_QEMU="${VALGRIND_QEMU_IO}" _qemu_proc_exec "${VALGRIND_LOGFILE}" "$QEMU_IO_PROG" $QEMU_IO_ARGS "$@" )
 incompatible_features     0x0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
-wrote 65536/65536 bytes at offset 0
-64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 qemu-io: Parameter 'lazy-refcounts' expects 'on' or 'off'
-qcow2: Marking image as corrupt: Preventing invalid write on metadata (overlaps with qcow2_header); further corruption events will be suppressed
+qcow2: Marking image as corrupt: Preventing invalid allocation of L2 table at offset 0; further corruption events will be suppressed
 write failed: Input/output error
 *** done
-- 
2.21.0