diff options
| author | Alberto Garcia <berto@igalia.com> | 2020-07-10 18:13:15 +0200 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2020-08-25 10:20:15 +0200 |
| commit | 7bbb59202a538b12df5840f250899ac3ec39a069 (patch) | |
| tree | 5c4553f0bd93e72d1e63cbb3ab45f109f5024893 /tests/qemu-iotests | |
| parent | 2118771ddf27dbfd6fb0b1e611423aa6cd72e160 (diff) | |
qcow2: Assert that expand_zero_clusters_in_l1() does not support subclusters
This function is only used by qcow2_expand_zero_clusters() to
downgrade a qcow2 image to a previous version. This would require
transforming all extended L2 entries into normal L2 entries but this
is not a simple task and there are no plans to implement this at the
moment.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <15e65112b4144381b4d8c0bdf8fb76b0d813e3d1.1594396418.git.berto@igalia.com>
[mreitz: Fixed comment style]
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'tests/qemu-iotests')
| -rwxr-xr-x | tests/qemu-iotests/061 | 6 | ||||
| -rw-r--r-- | tests/qemu-iotests/061.out | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/tests/qemu-iotests/061 b/tests/qemu-iotests/061 index 08ddbdd10c..5747beb7ed 100755 --- a/tests/qemu-iotests/061 +++ b/tests/qemu-iotests/061 @@ -304,6 +304,12 @@ _img_info --format-specific _check_test_img echo +echo "=== Testing version downgrade with extended L2 entries ===" +echo +_make_test_img -o "compat=1.1,extended_l2=on" 64M +$QEMU_IMG amend -o "compat=0.10" "$TEST_IMG" + +echo echo "=== Try changing the external data file ===" echo _make_test_img -o "compat=1.1" 64M diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out index b0a1382046..ee30da2665 100644 --- a/tests/qemu-iotests/061.out +++ b/tests/qemu-iotests/061.out @@ -533,6 +533,11 @@ Format specific information: extended l2: false No errors were found on the image. +=== Testing version downgrade with extended L2 entries === + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 +qemu-img: Cannot downgrade an image with incompatible features 0x10 set + === Try changing the external data file === Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 |