[PATCH v2 1/2] qapi: add filter-node-name option to drive-mirror

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

To correspond to blockdev-mirror command and make it possible to
deprecate implicit filters in the next commit.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 qapi/block-core.json | 7 +++++++
 blockdev.c           | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index aa97ee2641..93530d3a13 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1992,6 +1992,12 @@
 # @on-target-error: the action to take on an error on the target,
 #                   default 'report' (no limitations, since this applies to
 #                   a different block device than @device).
+#
+# @filter-node-name: the node name that should be assigned to the
+#                    filter driver that the mirror job inserts into the graph
+#                    above @device. If this option is not given, a node name is
+#                    autogenerated. (Since: 4.2)
+#
 # @unmap: Whether to try to unmap target sectors where source has
 #         only zero. If true, and target unallocated sectors will read as zero,
 #         target image sectors will be unmapped; otherwise, zeroes will be
@@ -2022,6 +2028,7 @@
             '*speed': 'int', '*granularity': 'uint32',
             '*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
             '*on-target-error': 'BlockdevOnError',
+            '*filter-node-name': 'str',
             '*unmap': 'bool', '*copy-mode': 'MirrorCopyMode',
             '*auto-finalize': 'bool', '*auto-dismiss': 'bool' } }
 
diff --git a/blockdev.c b/blockdev.c
index 8e029e9c01..2ca614c77f 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -4008,7 +4008,7 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp)
                            arg->has_on_source_error, arg->on_source_error,
                            arg->has_on_target_error, arg->on_target_error,
                            arg->has_unmap, arg->unmap,
-                           false, NULL,
+                           arg->has_filter_node_name, arg->filter_node_name,
                            arg->has_copy_mode, arg->copy_mode,
                            arg->has_auto_finalize, arg->auto_finalize,
                            arg->has_auto_dismiss, arg->auto_dismiss,
-- 
2.21.0