[Qemu-devel] [PATCH v8 2/4] block: Add node-name argument to drive-mirror.

["Benoît Canet" <benoit.canet@irqsave.net>]

This new argument can be used to specify the node-name of the new mirrored BDS.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
---
 blockdev.c           | 11 +++++++++--
 hmp.c                |  1 +
 qapi/block-core.json |  4 ++++
 qmp-commands.hx      |  3 +++
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 4cbcc56..06b14f2 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2106,6 +2106,7 @@ BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
 
 void qmp_drive_mirror(const char *device, const char *target,
                       bool has_format, const char *format,
+                      bool has_node_name, const char *node_name,
                       enum MirrorSyncMode sync,
                       bool has_mode, enum NewImageMode mode,
                       bool has_speed, int64_t speed,
@@ -2119,6 +2120,7 @@ void qmp_drive_mirror(const char *device, const char *target,
     BlockDriverState *source, *target_bs;
     BlockDriver *drv = NULL;
     Error *local_err = NULL;
+    QDict *options = NULL;
     int flags;
     int64_t size;
     int ret;
@@ -2220,12 +2222,17 @@ void qmp_drive_mirror(const char *device, const char *target,
         return;
     }
 
+    if (has_node_name) {
+        options = qdict_new();
+        qdict_put(options, "node-name", qstring_from_str(node_name));
+    }
+
     /* Mirroring takes care of copy-on-write using the source's backing
      * file.
      */
     target_bs = NULL;
-    ret = bdrv_open(&target_bs, target, NULL, NULL, flags | BDRV_O_NO_BACKING,
-                    drv, &local_err);
+    ret = bdrv_open(&target_bs, target, NULL, options,
+                    flags | BDRV_O_NO_BACKING, drv, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return;
diff --git a/hmp.c b/hmp.c
index ccc35d4..ef0d583 100644
--- a/hmp.c
+++ b/hmp.c
@@ -930,6 +930,7 @@ void hmp_drive_mirror(Monitor *mon, const QDict *qdict)
     }
 
     qmp_drive_mirror(device, filename, !!format, format,
+                     false, NULL,
                      full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
                      true, mode, false, 0, false, 0, false, 0,
                      false, 0, false, 0, &err);
diff --git a/qapi/block-core.json b/qapi/block-core.json
index eec881b..4c28d7b 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -769,6 +769,9 @@
 # @format: #optional the format of the new destination, default is to
 #          probe if @mode is 'existing', else the format of the source
 #
+# @node-name: #optional the new block driver state node name in the graph
+#             (Since 2.1)
+#
 # @mode: #optional whether and how QEMU should create a new image, default is
 #        'absolute-paths'.
 #
@@ -801,6 +804,7 @@
 ##
 { 'command': 'drive-mirror',
   'data': { 'device': 'str', 'target': 'str', '*format': 'str',
+            '*node-name': 'str',
             'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
             '*speed': 'int', '*granularity': 'uint32',
             '*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
diff --git a/qmp-commands.hx b/qmp-commands.hx
index d8aa4ed..98c28f5 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1293,6 +1293,7 @@ EQMP
     {
         .name       = "drive-mirror",
         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
+                      "node-name:s?,"
                       "on-source-error:s?,on-target-error:s?,"
                       "granularity:i?,buf-size:i?",
         .mhandler.cmd_new = qmp_marshal_input_drive_mirror,
@@ -1314,6 +1315,8 @@ Arguments:
 - "device": device name to operate on (json-string)
 - "target": name of new image file (json-string)
 - "format": format of new image (json-string, optional)
+- "node-name": the name of the new block driver state in the node graph
+               (json-string, optional)
 - "mode": how an image file should be created into the target
   file/device (NewImageMode, optional, default 'absolute-paths')
 - "speed": maximum speed of the streaming job, in bytes per second
-- 
1.9.1