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Tue, 7 Jul 2020 21:25:11 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-143.ams2.redhat.com [10.36.112.143]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 247A25C1D0; Tue, 7 Jul 2020 21:25:11 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 051E21141CC7; Tue, 7 Jul 2020 23:25:04 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 12/53] qemu-option: Replace opt_set() by cleaner opt_validate() Date: Tue, 7 Jul 2020 23:24:22 +0200 Message-Id: <20200707212503.1495927-13-armbru@redhat.com> In-Reply-To: <20200707212503.1495927-1-armbru@redhat.com> References: <20200707212503.1495927-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.81; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/07 17:25:09 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vladimir Sementsov-Ogievskiy Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" opt_set() frees its argument @value on failure. Slightly unclean; functions ideally do nothing on failure. To tidy this up, move opt_create() from opt_set() into its callers, along with the cleanup. Rename opt_set() to opt_validate(), noting its similarity to qemu_opts_validate(). Drop redundant parameter @opts; use opt->opts instead. Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake Reviewed-by: Vladimir Sementsov-Ogievskiy Message-Id: <20200707160613.848843-13-armbru@redhat.com> --- util/qemu-option.c | 35 +++++++++++++++++++---------------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/util/qemu-option.c b/util/qemu-option.c index 1023fe7527..d8233b3b35 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -516,36 +516,39 @@ static QemuOpt *opt_create(QemuOpts *opts, const char *name, char *value, return opt; } -static void opt_set(QemuOpts *opts, const char *name, char *value, - bool prepend, bool *help_wanted, Error **errp) +static bool opt_validate(QemuOpt *opt, bool *help_wanted, + Error **errp) { - QemuOpt *opt; const QemuOptDesc *desc; Error *local_err = NULL; - desc = find_desc_by_name(opts->list->desc, name); - if (!desc && !opts_accepts_any(opts)) { - g_free(value); - error_setg(errp, QERR_INVALID_PARAMETER, name); - if (help_wanted && is_help_option(name)) { + desc = find_desc_by_name(opt->opts->list->desc, opt->name); + if (!desc && !opts_accepts_any(opt->opts)) { + error_setg(errp, QERR_INVALID_PARAMETER, opt->name); + if (help_wanted && is_help_option(opt->name)) { *help_wanted = true; } - return; + return false; } - opt = opt_create(opts, name, value, prepend); opt->desc = desc; qemu_opt_parse(opt, &local_err); if (local_err) { error_propagate(errp, local_err); - qemu_opt_del(opt); + return false; } + + return true; } void qemu_opt_set(QemuOpts *opts, const char *name, const char *value, Error **errp) { - opt_set(opts, name, g_strdup(value), false, NULL, errp); + QemuOpt *opt = opt_create(opts, name, g_strdup(value), false); + + if (!opt_validate(opt, NULL, errp)) { + qemu_opt_del(opt); + } } void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val, @@ -817,9 +820,9 @@ static void opts_do_parse(QemuOpts *opts, const char *params, const char *firstname, bool prepend, bool *help_wanted, Error **errp) { - Error *local_err = NULL; char *option, *value; const char *p; + QemuOpt *opt; for (p = params; *p;) { p = get_opt_name_value(p, firstname, &option, &value); @@ -831,10 +834,10 @@ static void opts_do_parse(QemuOpts *opts, const char *params, continue; } - opt_set(opts, option, value, prepend, help_wanted, &local_err); + opt = opt_create(opts, option, value, prepend); g_free(option); - if (local_err) { - error_propagate(errp, local_err); + if (!opt_validate(opt, help_wanted, errp)) { + qemu_opt_del(opt); return; } }