On 12.10.22 17:37, Markus Armbruster wrote:
When you try to set a property that has no setter, the error message
blames "insufficient permission":

     $ qemu-system-x86_64 -S -display none -nodefaults -monitor stdio
     QEMU 7.1.50 monitor - type 'help' for more information
     (qemu) qom-set /machine type q35
     Error: Insufficient permission to perform this operation

This implies it could work with "sufficient permission".  It can't.
Change the error message to:

     Error: Property 'pc-i440fx-7.2-machine.type' is not writable

Do the same for getting a property that has no getter.

Signed-off-by: Markus Armbruster <arm...@redhat.com>
---
  qom/object.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/qom/object.c b/qom/object.c
index d34608558e..e5cef30f6d 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1383,7 +1383,8 @@ bool object_property_get(Object *obj, const char *name, 
Visitor *v,
      }
if (!prop->get) {
-        error_setg(errp, QERR_PERMISSION_DENIED);
+        error_setg(errp, "Property '%s.%s' is not readable",
+                   object_get_typename(obj), name);
          return false;
      }
      prop->get(obj, v, name, prop->opaque, &err);
@@ -1402,7 +1403,8 @@ bool object_property_set(Object *obj, const char *name, 
Visitor *v,
      }
if (!prop->set) {
-        error_setg(errp, QERR_PERMISSION_DENIED);
+        error_setg(errp, "Property '%s.%s' is not writable",
+                   object_get_typename(obj), name);
          return false;
      }
      prop->set(obj, v, name, prop->opaque, errp);

Much better!

Reviewed-by: David Hildenbrand <da...@redhat.com>

--
Thanks,

David / dhildenb


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