[Qemu-devel] [PATCH RFC 46/48] monitor: New argument type 'O'

[Markus Armbruster <armbru@redhat.com>]

In the human monitor, it declares a single optional argument to be
parsed according to the QemuOptsList given by its name.

In QMP, it declares an optional argument for each member of the
QemuOptsList.

FIXME Only string options are implemented.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 monitor.c |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/monitor.c b/monitor.c
index 5c87a98..c478c27 100644
--- a/monitor.c
+++ b/monitor.c
@@ -67,6 +67,9 @@
  * 'F'          filename
  * 'B'          block device name
  * 's'          string (accept optional quote)
+ * 'O'          option string of the form NAME=VALUE,...
+ *              parsed according to QemuOptsList given by its name
+ *              Example: 'device:O' uses qemu_device_opts.
  * 'i'          32 bit integer
  * 'l'          target long (32 or 64 bit)
  * 'M'          just like 'l', except in user mode the value is
@@ -3643,6 +3646,31 @@ static const mon_cmd_t *monitor_parse_command(Monitor *mon,
                 qdict_put(qdict, key, qstring_from_str(buf));
             }
             break;
+        case 'O':
+            {
+                QemuOptsList *opts_list;
+                QemuOpts *opts;
+
+                opts_list = qemu_find_opts(key);
+                if (!opts_list) {
+                    goto bad_type;
+                }
+                while (qemu_isspace(*p)) {
+                    p++;
+                }
+                if (!*p)
+                    break;
+                if (get_str(buf, sizeof(buf), &p) < 0) {
+                    goto fail;
+                }
+                opts = qemu_opts_parse(opts_list, buf, 1);
+                if (!opts) {
+                    goto fail;
+                }
+                qemu_opts_to_qdict(opts, qdict);
+                qemu_opts_del(opts);
+            }
+            break;
         case '/':
             {
                 int count, format, size;
@@ -4303,6 +4331,7 @@ static int check_arg(const CmdArgs *cmd_args, QDict *args)
                          qint_from_int(qbool_get_int(qobject_to_qbool(value))));
             }
             break;
+        case 'O':
         default:
             /* impossible */
             abort();
@@ -4317,6 +4346,23 @@ static void cmd_args_init(CmdArgs *cmd_args)
     cmd_args->type = cmd_args->flag = cmd_args->optional = 0;
 }
 
+static int check_opts(QemuOptsList *opts_list, QDict *args)
+{
+    QemuOptDesc *desc;
+    CmdArgs cmd_args;
+
+    for (desc = opts_list->desc; desc->name; desc++) {
+        cmd_args_init(&cmd_args);
+        cmd_args.type = 's';        // FIXME obey desc->type
+        cmd_args.optional = 1;
+        qstring_append(cmd_args.name, desc->name);
+        if (check_arg(&cmd_args, args) < 0) {
+            return -1;
+        }
+    }
+    return 0;
+}
+
 /*
  * This is not trivial, we have to parse Monitor command's argument
  * type syntax to be able to check the arguments provided by clients.
@@ -4329,6 +4375,7 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
     int err;
     const char *p;
     CmdArgs cmd_args;
+    QemuOptsList *opts_list;
 
     if (cmd->args_type == NULL) {
         return (qdict_size(args) == 0 ? 0 : -1);
@@ -4336,6 +4383,7 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
 
     err = 0;
     cmd_args_init(&cmd_args);
+    opts_list = NULL;
 
     for (p = cmd->args_type;; p++) {
         if (*p == ':') {
@@ -4344,16 +4392,23 @@ static int monitor_check_qmp_args(const mon_cmd_t *cmd, QDict *args)
             if (cmd_args.type == '-') {
                 cmd_args.flag = *p++;
                 cmd_args.optional = 1;
+            } else if (cmd_args.type == 'O') {
+                opts_list = qemu_find_opts(qstring_get_str(cmd_args.name));
+                assert(opts_list);
             } else if (*p == '?') {
                 cmd_args.optional = 1;
                 p++;
             }
 
             assert(*p == ',' || *p == '\0');
-            err = check_arg(&cmd_args, args);
-
-            QDECREF(cmd_args.name);
-            cmd_args_init(&cmd_args);
+            if (opts_list) {
+                err = check_opts(opts_list, args);
+                opts_list = NULL;
+            } else {
+                err = check_arg(&cmd_args, args);
+                QDECREF(cmd_args.name);
+                cmd_args_init(&cmd_args);
+            }
 
             if (err < 0) {
                 break;
-- 
1.6.6