@@ -3449,10 +3449,11 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
qcow2_opts->preallocation = PREALLOC_MODE_OFF;
}
if (qcow2_opts->has_backing_file &&
- qcow2_opts->preallocation != PREALLOC_MODE_OFF)
+ qcow2_opts->preallocation != PREALLOC_MODE_OFF &&
+ !qcow2_opts->extended_l2)
{
- error_setg(errp, "Backing file and preallocation cannot be used at "
- "the same time");
+ error_setg(errp, "Backing file and preallocation can only be used at "
+ "the same time if extended_l2 is on");
ret = -EINVAL;
goto out;
}
@@ -203,7 +203,7 @@ Job failed: Different refcount widths than 16 bits require compatibility level 1
=== Invalid backing file options ===
{"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"backing-file": "/dev/null", "driver": "qcow2", "file": "node0", "preallocation": "full", "size": 67108864}}}
{"return": {}}
-Job failed: Backing file and preallocation cannot be used at the same time
+Job failed: Backing file and preallocation can only be used at the same time if extended_l2 is on
{"execute": "job-dismiss", "arguments": {"id": "job0"}}
{"return": {}}