[Qemu-devel] [PATCH v23 03/32] 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.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Chunyan Liu <cyliu@suse.com>
---
 qapi-schema.json   | 6 +++++-
 qmp-commands.hx    | 2 ++
 util/qemu-config.c | 4 ++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/qapi-schema.json b/qapi-schema.json
index b68cd44..cf9174e 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -4088,12 +4088,16 @@
 #
 # @help: #optional human readable text string, not suitable for parsing.
 #
+# @default: #optional string representation of the default used
+#           if the option is omitted. (since 2.0)
+#
 # Since 1.5
 ##
 { '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 a22621f..178aadd 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2895,6 +2895,8 @@ 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 f610101..d608b2f 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;
-- 
1.7.12.4