From d822979bdf80c3ea9752615af15f231b4c4ce547 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 2 Feb 2012 09:47:13 +0100
Subject: [PATCH] qdev: remove direct calls to print/parse

There's no need to call into ->parse and ->print manually.  The
QOM legacy properties do that for us.

Furthermore, in some cases legacy and static properties have exactly
the same behavior, and we could drop the legacy properties right away.
Add an appropriate fallback to prepare for this.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/qdev-monitor.c    | 30 +++++++++++++++++-------------
 hw/qdev-properties.c | 26 ++++++++++----------------
 hw/qdev.c            |  9 +++++++++
 3 files changed, 36 insertions(+), 29 deletions(-)

diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
index 135c2bf237..49f13ca087 100644
--- a/hw/qdev-monitor.c
+++ b/hw/qdev-monitor.c
@@ -485,22 +485,26 @@ static void qbus_print(Monitor *mon, BusState *bus, int indent);
 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
                              const char *prefix, int indent)
 {
-    char buf[64];
-
     if (!props)
         return;
-    while (props->name) {
-        /*
-         * TODO Properties without a print method are just for dirty
-         * hacks.  qdev_prop_ptr is the only such PropertyInfo.  It's
-         * marked for removal.  The test props->info->print should be
-         * removed along with it.
-         */
-        if (props->info->print) {
-            props->info->print(dev, props, buf, sizeof(buf));
-            qdev_printf("%s-prop: %s = %s\n", prefix, props->name, buf);
+    for (; props->name; props++) {
+        Error *err = NULL;
+        char *value;
+        char *legacy_name = g_strdup_printf("legacy-%s", props->name);
+        if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
+            value = object_property_get_str(OBJECT(dev), legacy_name, &err);
+        } else {
+            value = object_property_get_str(OBJECT(dev), props->name, &err);
         }
-        props++;
+        g_free(legacy_name);
+
+        if (err) {
+            error_free(err);
+            continue;
+        }
+        qdev_printf("%s-prop: %s = %s\n", prefix, props->name,
+                    value && *value ? value : "<null>");
+        g_free(value);
     }
 }
 
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index c4583a14d7..5e19ec8be3 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -1073,24 +1073,18 @@ void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
 
 int qdev_prop_parse(DeviceState *dev, const char *name, const char *value)
 {
-    Property *prop;
-    int ret;
+    char *legacy_name;
+    Error *err = NULL;
 
-    prop = qdev_prop_find(dev, name);
-    /*
-     * TODO Properties without a parse method are just for dirty
-     * hacks.  qdev_prop_ptr is the only such PropertyInfo.  It's
-     * marked for removal.  The test !prop->info->parse should be
-     * removed along with it.
-     */
-    if (!prop || !prop->info->parse) {
-        qerror_report(QERR_PROPERTY_NOT_FOUND, object_get_typename(OBJECT(dev)), name);
-        return -1;
+    legacy_name = g_strdup_printf("legacy-%s", name);
+    if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
+        object_property_set_str(OBJECT(dev), value, legacy_name, &err);
+    } else {
+        object_property_set_str(OBJECT(dev), value, name, &err);
     }
-    ret = prop->info->parse(dev, prop, value);
-    if (ret < 0) {
-        Error *err;
-        error_set_from_qdev_prop_error(&err, ret, dev, prop, value);
+    g_free(legacy_name);
+
+    if (err) {
         qerror_report_err(err);
         error_free(err);
         return -1;
diff --git a/hw/qdev.c b/hw/qdev.c
index e3b53b7f62..acb7829b5d 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -581,6 +581,15 @@ void qdev_property_add_legacy(DeviceState *dev, Property *prop,
 void qdev_property_add_static(DeviceState *dev, Property *prop,
                               Error **errp)
 {
+    /*
+     * TODO qdev_prop_ptr does not have getters or setters.  It must
+     * go now that it can be replaced with links.  The test should be
+     * removed along with it: all static properties are read/write.
+     */
+    if (!prop->info->get && !prop->info->set) {
+        return;
+    }
+
     object_property_add(OBJECT(dev), prop->name, prop->info->name,
                         prop->info->get, prop->info->set,
                         NULL,