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-rw-r--r--qapi/block.json18
1 files changed, 16 insertions, 2 deletions
diff --git a/qapi/block.json b/qapi/block.json
index 693e234779..2e08b35769 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -81,19 +81,33 @@
##
# @blockdev-snapshot-internal-sync:
#
-# Synchronously take an internal snapshot of a block device, when the format
-# of the image used supports it.
+# Synchronously take an internal snapshot of a block device, when the
+# format of the image used supports it. If the name is an empty
+# string, or a snapshot with name already exists, the operation will
+# fail.
#
# For the arguments, see the documentation of BlockdevSnapshotInternal.
#
# Returns: nothing on success
+#
# If @device is not a valid block device, GenericError
+#
# If any snapshot matching @name exists, or @name is empty,
# GenericError
+#
# If the format of the image used does not support it,
# BlockFormatFeatureNotSupported
#
# Since: 1.7
+#
+# Example:
+#
+# -> { "execute": "blockdev-snapshot-internal-sync",
+# "arguments": { "device": "ide-hd0",
+# "name": "snapshot0" }
+# }
+# <- { "return": {} }
+#
##
{ 'command': 'blockdev-snapshot-internal-sync',
'data': 'BlockdevSnapshotInternal' }