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-rw-r--r--qapi/block-core.json9
1 files changed, 8 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 9758fc48d2..91586fb1fb 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1472,6 +1472,12 @@
#
# For the arguments, see the documentation of BlockdevSnapshot.
#
+# Features:
+# @allow-write-only-overlay: If present, the check whether this operation is safe
+# was relaxed so that it can be used to change
+# backing file of a destination of a blockdev-mirror.
+# (since 5.0)
+#
# Since: 2.5
#
# Example:
@@ -1492,7 +1498,8 @@
#
##
{ 'command': 'blockdev-snapshot',
- 'data': 'BlockdevSnapshot' }
+ 'data': 'BlockdevSnapshot',
+ 'features': [ 'allow-write-only-overlay' ] }
##
# @change-backing-file: