[Qemu-devel] [PATCH 10/10] qom: Add QERR_PROPERTY_SET_AFTER_REALIZE

[Paolo Bonzini <pbonzini@redhat.com>]

From: Peter Maydell <peter.maydell@linaro.org>

Add a new QError QERR_PROPERTY_SET_AFTER_REALIZE for attempts
to set a QOM or qdev property after the object/device has been
realized. This allows a slightly more informative diagnostic
than the previous "Insufficient permission" message.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/qdev-properties.c |   15 ++++++++++-----
 qerror.c             |    4 ++++
 qerror.h             |    3 +++
 qom/object.c         |   30 ++++++++++++++++++++----------
 4 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 6766abc..29499bf 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -76,7 +76,8 @@ static void set_pointer(Object *obj, Visitor *v, Property *prop,
     int ret;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -242,7 +243,8 @@ static void set_vlan(Object *obj, Visitor *v, void *opaque,
     VLANState *vlan;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -303,7 +305,8 @@ static void set_mac(Object *obj, Visitor *v, void *opaque,
     char *str, *p;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -389,7 +392,8 @@ static void set_pci_devfn(Object *obj, Visitor *v, void *opaque,
     char *str = (char *)"";
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -463,7 +467,8 @@ static void set_blocksize(Object *obj, Visitor *v, void *opaque,
     Error *local_err = NULL;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
diff --git a/qerror.c b/qerror.c
index 5092fe7..860b3cb 100644
--- a/qerror.c
+++ b/qerror.c
@@ -229,6 +229,10 @@ static const QErrorStringTable qerror_table[] = {
         .desc      = "Property '%(device).%(property)' not found",
     },
     {
+        .error_fmt = QERR_PROPERTY_SET_AFTER_REALIZE,
+        .desc      = "Property '%(device).%(property)' cannot be set after realize",
+    },
+    {
         .error_fmt = QERR_PROPERTY_VALUE_BAD,
         .desc      = "Property '%(device).%(property)' doesn't take value '%(value)'",
     },
diff --git a/qerror.h b/qerror.h
index 4cbba48..6f7b1fb 100644
--- a/qerror.h
+++ b/qerror.h
@@ -193,6 +193,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_PROPERTY_NOT_FOUND \
     "{ 'class': 'PropertyNotFound', 'data': { 'device': %s, 'property': %s } }"
 
+#define QERR_PROPERTY_SET_AFTER_REALIZE \
+    "{ 'class': 'PropertySetAfterRealize', 'data': { 'device': %s, 'property': %s } }"
+
 #define QERR_PROPERTY_VALUE_BAD \
     "{ 'class': 'PropertyValueBad', 'data': { 'device': %s, 'property': %s, 'value': %s } }"
 
diff --git a/qom/object.c b/qom/object.c
index b113e66..e131366 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -809,7 +809,8 @@ void object_property_get(Object *obj, Visitor *v, const char *name,
     }
 
     if (!prop->get) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
     } else {
         prop->get(obj, v, prop->opaque, name, errp);
     }
@@ -824,7 +825,8 @@ void object_property_set(Object *obj, Visitor *v, const char *name,
     }
 
     if (!prop->set) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
     } else {
         prop->set(obj, v, prop->opaque, name, errp);
     }
@@ -1445,7 +1447,8 @@ static void set_bit(Object *obj, Visitor *v, void *opaque,
     bool value;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1483,7 +1486,8 @@ static void set_uint8(Object *obj, Visitor *v, void *opaque,
     uint8_t *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1548,7 +1552,8 @@ static void set_uint16(Object *obj, Visitor *v, void *opaque,
     uint16_t *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1579,7 +1584,8 @@ static void set_uint32(Object *obj, Visitor *v, void *opaque,
     uint32_t *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1602,7 +1608,8 @@ static void set_int32(Object *obj, Visitor *v, void *opaque,
     int32_t *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1673,7 +1680,8 @@ static void set_uint64(Object *obj, Visitor *v, void *opaque,
     uint64_t *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1759,7 +1767,8 @@ static void set_string(Object *obj, Visitor *v, void *opaque,
     char *str;
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
@@ -1802,7 +1811,8 @@ void property_set_enum(Object *obj, Visitor *v, void *opaque,
     int *ptr = object_get_prop_ptr(obj, prop);
 
     if (object_is_realized(obj)) {
-        error_set(errp, QERR_PERMISSION_DENIED);
+        error_set(errp, QERR_PROPERTY_SET_AFTER_REALIZE,
+                  object_get_id(obj), name);
         return;
     }
 
-- 
1.7.10.1