[Qemu-devel] [PATCH v21 02/25] qapi: output def_value_str when query command line options

[Chunyan Liu <cyliu@suse.com>]

Change qapi interfaces to output the newly added def_value_str when querying
command line options.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Chunyan Liu <cyliu@suse.com>
---
 qapi-schema.json   |    8 ++++++--
 qmp-commands.hx    |    2 ++
 util/qemu-config.c |    4 ++++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/qapi-schema.json b/qapi-schema.json
index 473c096..83e5870 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -4010,12 +4010,16 @@
 #
 # @help: #optional human readable text string, not suitable for parsing.
 #
-# Since 1.5
+# @default: #optional string representation of the default used
+#           if the option is omitted.
+#
+# Since 2.0
 ##
 { 'type': 'CommandLineParameterInfo',
   'data': { 'name': 'str',
             'type': 'CommandLineParameterType',
-            '*help': 'str' } }
+            '*help': 'str',
+            '*default': 'str' } }
 
 ##
 # @CommandLineOptionInfo:
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 8a0e832..9b89d6c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2833,6 +2833,8 @@ Each array entry contains the following:
               or 'size')
     - "help": human readable description of the parameter
               (json-string, optional)
+    - "default": default value string for the parameter
+                 (json-string, optional)
 
 Example:
 
diff --git a/util/qemu-config.c b/util/qemu-config.c
index 797df71..c6e7db6 100644
--- a/util/qemu-config.c
+++ b/util/qemu-config.c
@@ -68,6 +68,10 @@ static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
             info->has_help = true;
             info->help = g_strdup(desc[i].help);
         }
+        if (desc[i].def_value_str) {
+            info->has_q_default = true;
+            info->q_default = g_strdup(desc[i].def_value_str);
+        }
 
         entry = g_malloc0(sizeof(*entry));
         entry->value = info;
-- 
1.6.0.2