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-rw-r--r--qapi/block-core.json4
1 files changed, 4 insertions, 0 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 746d1694c2..df5e07debd 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1610,6 +1610,9 @@
 #     node specified by @drive.  If this option is not given, a node
 #     name is autogenerated.  (Since: 4.2)
 #
+# @discard-source: Discard blocks on source which have already been
+#     copied to the target.  (Since 9.1)
+#
 # @x-perf: Performance options.  (Since 6.0)
 #
 # Features:
@@ -1631,6 +1634,7 @@
             '*on-target-error': 'BlockdevOnError',
             '*auto-finalize': 'bool', '*auto-dismiss': 'bool',
             '*filter-node-name': 'str',
+            '*discard-source': 'bool',
             '*x-perf': { 'type': 'BackupPerf',
                          'features': [ 'unstable' ] } } }