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bh=CGyiNRcDvp1yt2vo5ajS0q1H+fALnTj+obGbwNJPbJw=; b=KZVij3Usc7DpEsvqvJlwZjvkIQyw4S633jXBSLdhuPU69KV3UGlr7uEyKEQ3URVJx34KfF FgatCMD+TqaFpagh6kIUJn9UDuAF/EtMcx5UDVRASCekVjx5H9fixgumcnGVhiuBoiz7tV qT/k0oUcbrFpf7F/NPVATbbRvqi3eOI= X-MC-Unique: V6GUV4scO_Sf-i0YpMKDPA-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: arei.gonglei@huawei.com, lvivier@redhat.com, amit@kernel.org, mst@redhat.com, pbonzini@redhat.com, berrange@redhat.com, eduardo@habkost.net, thuth@redhat.com, david@redhat.com Subject: [PATCH 1/4] qom: Improve error messages when property has no getter or setter Date: Wed, 12 Oct 2022 17:37:58 +0200 Message-Id: <20221012153801.2604340-2-armbru@redhat.com> In-Reply-To: <20221012153801.2604340-1-armbru@redhat.com> References: <20221012153801.2604340-1-armbru@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1665589362380100001 Content-Type: text/plain; charset="utf-8" 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 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 *nam= e, Visitor *v, } =20 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 *nam= e, Visitor *v, } =20 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); --=20 2.37.2