[Qemu-devel] [PATCH v5 4/4] hmp: add monitor command to add/remove a child

[Wen Congyang <wency@cn.fujitsu.com>]

The new command is blockdev_child_add and blockdev_child_del.
It does the same thing as the QMP command x-blockdev-child-add
and x-blockdev-child-del.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
---
 hmp-commands.hx | 28 ++++++++++++++++++++++++++++
 hmp.c           | 20 ++++++++++++++++++++
 hmp.h           |  2 ++
 3 files changed, 50 insertions(+)

diff --git a/hmp-commands.hx b/hmp-commands.hx
index a511004..57adb7d 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -193,6 +193,34 @@ actions (drive options rerror, werror).
 ETEXI
 
     {
+        .name       = "blockdev_child_add",
+        .args_type  = "id:B,child:B",
+        .params     = "parent child",
+        .help       = "add a child to a BDS",
+        .mhandler.cmd = hmp_blockdev_child_add,
+    },
+
+STEXI
+@item blockdev_child_add @var{parent} @var{child}
+@findex blockdev_child_add
+Add a child to the block device.
+ETEXI
+
+    {
+        .name       = "blockdev_child_del",
+        .args_type  = "id:B,child:B",
+        .params     = "parent child",
+        .help       = "remove a child from a BDS",
+        .mhandler.cmd = hmp_blockdev_child_del,
+    },
+
+STEXI
+@item blockdev_child_del @var{parent} @var{child}
+@findex blockdev_child_del
+Remove a child from the parent device.
+ETEXI
+
+    {
         .name       = "change",
         .args_type  = "device:B,target:F,arg:s?",
         .params     = "device filename [format]",
diff --git a/hmp.c b/hmp.c
index 3f807b7..1dc1bed 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2325,3 +2325,23 @@ void hmp_rocker_of_dpa_groups(Monitor *mon, const QDict *qdict)
 
     qapi_free_RockerOfDpaGroupList(list);
 }
+
+void hmp_blockdev_child_add(Monitor *mon, const QDict *qdict)
+{
+    const char *id = qdict_get_str(qdict, "id");
+    const char *child_id = qdict_get_str(qdict, "child");
+    Error *local_err = NULL;
+
+    qmp_x_blockdev_child_add(id, child_id, &local_err);
+    hmp_handle_error(mon, &local_err);
+}
+
+void hmp_blockdev_child_del(Monitor *mon, const QDict *qdict)
+{
+    const char *id = qdict_get_str(qdict, "id");
+    const char *child_id = qdict_get_str(qdict, "child");
+    Error *local_err = NULL;
+
+    qmp_x_blockdev_child_del(id, child_id, &local_err);
+    hmp_handle_error(mon, &local_err);
+}
diff --git a/hmp.h b/hmp.h
index 81656c3..3033648 100644
--- a/hmp.h
+++ b/hmp.h
@@ -130,5 +130,7 @@ void hmp_rocker(Monitor *mon, const QDict *qdict);
 void hmp_rocker_ports(Monitor *mon, const QDict *qdict);
 void hmp_rocker_of_dpa_flows(Monitor *mon, const QDict *qdict);
 void hmp_rocker_of_dpa_groups(Monitor *mon, const QDict *qdict);
+void hmp_blockdev_child_add(Monitor *mon, const QDict *qdict);
+void hmp_blockdev_child_del(Monitor *mon, const QDict *qdict);
 
 #endif
-- 
2.4.3