From 3f7febc93785bf0e622072b01f846d2acbcd9c0b Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Wed, 12 Oct 2022 17:37:58 +0200 Subject: [PATCH] qom: Improve error messages when property has no getter or setter 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 Message-Id: <20221012153801.2604340-2-armbru@redhat.com> Reviewed-by: David Hildenbrand --- 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);