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-rw-r--r--qapi-schema.json7
1 files changed, 6 insertions, 1 deletions
diff --git a/qapi-schema.json b/qapi-schema.json
index 35095ff0b3..7b9fef1bd1 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1634,6 +1634,10 @@
# @format: #optional the format of the new destination, default is to
# probe if @mode is 'existing', else the format of the source
#
+# @sync: what parts of the disk image should be copied to the destination
+# (all the disk, only the sectors allocated in the topmost image, or
+# only new I/O).
+#
# @mode: #optional whether and how QEMU should create a new image, default is
# 'absolute-paths'.
#
@@ -1655,7 +1659,8 @@
##
{ 'type': 'DriveBackup',
'data': { 'device': 'str', 'target': 'str', '*format': 'str',
- '*mode': 'NewImageMode', '*speed': 'int',
+ 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
+ '*speed': 'int',
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }