From 25f8dd96598042a88fdd970d5531584b589b10e4 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 20 Jan 2015 10:04:07 +0100 Subject: [PATCH] qdev: Don't exit when running into bad -global -global lets you set a nice booby-trap for yourself: $ qemu-system-x86_64 -nodefaults -S -display none -usb -monitor stdio -global usb-mouse.usb_version=l QEMU 2.1.94 monitor - type 'help' for more information (qemu) device_add usb-mouse Parameter 'usb_version' expects an int64 value or range $ echo $? 1 Not nice. Until commit 3196270 we even abort()ed. The same error triggers if you manage to screw up a machine type's compat_props. To demonstrate, change HW_COMPAT_2_1's entry to .driver = "usb-mouse",\ .property = "usb_version",\ .value = "1", \ Then run $ qemu-system-x86_64 -usb -M pc-i440fx-2.1 -device usb-mouse upstream-qemu: -device usb-mouse: Parameter 'usb_version' expects an int64 value or range $ echo $? 1 One of our creatively cruel error messages. Since this is actually a coding error, we *should* abort() here. Replace the error by an assertion failure in this case. But turn the fatal error into a mere warning when the faulty GlobalProperty comes from the user. Looks like this: $ qemu-system-x86_64 -nodefaults -S -display none -usb -monitor stdio -global usb-mouse.usb_version=l QEMU 2.1.94 monitor - type 'help' for more information (qemu) device_add usb-mouse Warning: global usb-mouse.usb_version=l ignored (Parameter 'usb_version' expects an int64 value or range) (qemu) This is consistent with how we handle similarly unusable -global in qdev_prop_check_globals(). You could argue that the error should make device_add fail. Would be harder, because we're running within TypeInfo's instance_post_init() method device_post_init(), which can't fail. Signed-off-by: Markus Armbruster Acked-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Reviewed-by: Eric Blake Reviewed-by: Eduardo Habkost --- hw/core/qdev-properties.c | 21 +++++++++------------ hw/core/qdev.c | 8 +------- include/hw/qdev-properties.h | 4 +--- 3 files changed, 11 insertions(+), 22 deletions(-) diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 2e47f70eb4..5a4e4d5ec8 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -990,8 +990,8 @@ int qdev_prop_check_globals(void) return ret; } -void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename, - Error **errp) +static void qdev_prop_set_globals_for_type(DeviceState *dev, + const char *typename) { GlobalProperty *prop; @@ -1004,25 +1004,22 @@ void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename, prop->used = true; object_property_parse(OBJECT(dev), prop->value, prop->property, &err); if (err != NULL) { - error_propagate(errp, err); + assert(prop->user_provided); + error_report("Warning: global %s.%s=%s ignored (%s)", + prop->driver, prop->property, prop->value, + error_get_pretty(err)); + error_free(err); return; } } } -void qdev_prop_set_globals(DeviceState *dev, Error **errp) +void qdev_prop_set_globals(DeviceState *dev) { ObjectClass *class = object_get_class(OBJECT(dev)); do { - Error *err = NULL; - - qdev_prop_set_globals_for_type(dev, object_class_get_name(class), - &err); - if (err != NULL) { - error_propagate(errp, err); - return; - } + qdev_prop_set_globals_for_type(dev, object_class_get_name(class)); class = object_class_get_parent(class); } while (class); } diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 44c6b93727..5f63c5bbde 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -1186,13 +1186,7 @@ static void device_initfn(Object *obj) static void device_post_init(Object *obj) { - Error *err = NULL; - qdev_prop_set_globals(DEVICE(obj), &err); - if (err) { - qerror_report_err(err); - error_free(err); - exit(EXIT_FAILURE); - } + qdev_prop_set_globals(DEVICE(obj)); } /* Unlink device from bus and free the structure. */ diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h index 070006c715..57ee363b89 100644 --- a/include/hw/qdev-properties.h +++ b/include/hw/qdev-properties.h @@ -180,9 +180,7 @@ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value); void qdev_prop_register_global(GlobalProperty *prop); void qdev_prop_register_global_list(GlobalProperty *props); int qdev_prop_check_globals(void); -void qdev_prop_set_globals(DeviceState *dev, Error **errp); -void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename, - Error **errp); +void qdev_prop_set_globals(DeviceState *dev); void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev, Property *prop, const char *value);