[PATCH v3 25/30] qom: Add user_creatable_add_from_str()

This is a version of user_creatable_process_cmdline() with an Error parameter that never calls exit() and is therefore usable in HMP. Signed-off-by: Kevin Wolf <kwolf(a)redhat.com&gt; Acked-by: Peter Krempa <pkrempa(a)redhat.com&gt; Reviewed-by: Eric Blake <eblake(a)redhat.com&gt; --- include/qom/object_interfaces.h | 16 ++++++++++++++++ qom/object_interfaces.c | 29 ++++++++++++++++++++++++----- 2 files changed, 40 insertions(+), 5 deletions(-) diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h index 1e6c51b541..07511e6cff 100644 --- a/include/qom/object_interfaces.h +++ b/include/qom/object_interfaces.h @@ -144,6 +144,22 @@ typedef bool (*user_creatable_add_opts_predicate)(const char *type); int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp); +/** + * user_creatable_add_from_str: + * @optarg: the object definition string as passed on the command line + * @errp: if an error occurs, a pointer to an area to store the error + * + * Create an instance of the user creatable object by parsing optarg + * with a keyval parser and implicit key 'qom-type', converting the + * result to ObjectOptions and calling into qmp_object_add(). + * + * If a help option is given, print help instead. + * + * Returns: true when an object was successfully created, false when an error + * occurred (*errp is set then) or help was printed (*errp is not set). + */ +bool user_creatable_add_from_str(const char *optarg, Error **errp); + /** * user_creatable_process_cmdline: * @optarg: the object definition string as passed on the command line diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c index 2eaf9971f5..bf9f8cd2c6 100644 --- a/qom/object_interfaces.c +++ b/qom/object_interfaces.c @@ -291,26 +291,45 @@ static void user_creatable_print_help_from_qdict(QDict *args) } } -void user_creatable_process_cmdline(const char *optarg) +bool user_creatable_add_from_str(const char *optarg, Error **errp) { + ERRP_GUARD(); QDict *args; bool help; Visitor *v; ObjectOptions *options; - args = keyval_parse(optarg, "qom-type", &help, &error_fatal); + args = keyval_parse(optarg, "qom-type", &help, errp); + if (*errp) { + return false; + } if (help) { user_creatable_print_help_from_qdict(args); - exit(EXIT_SUCCESS); + qobject_unref(args); + return false; } v = qobject_input_visitor_new_keyval(QOBJECT(args)); - visit_type_ObjectOptions(v, NULL, &options, &error_fatal); + visit_type_ObjectOptions(v, NULL, &options, errp); visit_free(v); qobject_unref(args); - user_creatable_add_qapi(options, &error_fatal); + if (*errp) { + goto out; + } + + user_creatable_add_qapi(options, errp); +out: qapi_free_ObjectOptions(options); + return !*errp; +} + +void user_creatable_process_cmdline(const char *optarg) +{ + if (!user_creatable_add_from_str(optarg, &error_fatal)) { + /* Help was printed */ + exit(EXIT_SUCCESS); + } } bool user_creatable_del(const char *id, Error **errp) -- 2.29.2