From 485febc6d1382a82e4e1640729fffbf0c1392a44 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 13 Mar 2015 17:25:50 +0100 Subject: qmp: Wean off qerror_report() The traditional QMP command handler interface int qmp_FOO(Monitor *mon, const QDict *params, QObject **ret_data); doesn't provide for returning an Error object. Instead, the handler is expected to stash it in the monitor with qerror_report(). When we rebased QMP on top of QAPI, we didn't change this interface. Instead, commit 776574d introduced "middle mode" as a temporary aid for converting existing QMP commands to QAPI one by one. More than three years later, we're still using it. Middle mode has two effects: * Instead of the native input marshallers static void qmp_marshal_input_FOO(QDict *, QObject **, Error **) it generates input marshallers conforming to the traditional QMP command handler interface. * It suppresses generation of code to register them with qmp_register_command() This permits giving them internal linkage. As long as we need qmp-commands.hx, we can't use the registry behind qmp_register_command(), so the latter has to stay for now. The former has to go to get rid of qerror_report(). Changing all QMP commands to fit the QAPI mold in one go was impractical back when we started, but by now there are just a few stragglers left: do_qmp_capabilities(), qmp_qom_set(), qmp_qom_get(), qmp_object_add(), qmp_netdev_add(), do_device_add(). Switch middle mode to generate native input marshallers, and adapt the stragglers. Simplifies both the monitor code and the stragglers. Rename do_qmp_capabilities() to qmp_capabilities(), and do_device_add() to qmp_device_add, because that's how QMP command handlers are named today. Signed-off-by: Markus Armbruster Reviewed-by: Stefan Hajnoczi Reviewed-by: Eric Blake Reviewed-by: Luiz Capitulino --- monitor.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) (limited to 'monitor.c') diff --git a/monitor.c b/monitor.c index 4cdc873922..6a0ed807d1 100644 --- a/monitor.c +++ b/monitor.c @@ -122,7 +122,7 @@ typedef struct mon_cmd_t { const char *help; union { void (*cmd)(Monitor *mon, const QDict *qdict); - int (*cmd_new)(Monitor *mon, const QDict *params, QObject **ret_data); + void (*cmd_new)(QDict *params, QObject **ret_data, Error **errp); } mhandler; /* @sub_table is a list of 2nd level of commands. If it do not exist, * mhandler should be used. If it exist, sub_table[?].mhandler should be @@ -563,11 +563,9 @@ static void monitor_qapi_event_init(void) qmp_event_set_func_emit(monitor_qapi_event_queue); } -static int do_qmp_capabilities(Monitor *mon, const QDict *params, - QObject **ret_data) +static void qmp_capabilities(QDict *params, QObject **ret_data, Error **errp) { - mon->qmp.in_command_mode = true; - return 0; + cur_mon->qmp.in_command_mode = true; } static void handle_hmp_command(Monitor *mon, const char *cmdline); @@ -4725,7 +4723,7 @@ static int monitor_can_read(void *opaque) static bool invalid_qmp_mode(const Monitor *mon, const mon_cmd_t *cmd, Error **errp) { - bool is_cap = cmd->mhandler.cmd_new == do_qmp_capabilities; + bool is_cap = cmd->mhandler.cmd_new == qmp_capabilities; if (is_cap && mon->qmp.in_command_mode) { error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, @@ -5044,17 +5042,7 @@ static void handle_qmp_command(JSONMessageParser *parser, QList *tokens) goto err_out; } - if (cmd->mhandler.cmd_new(mon, args, &data)) { - /* Command failed... */ - if (!mon->error) { - /* ... without setting an error, so make one up */ - error_setg(&local_err, QERR_UNDEFINED_ERROR); - } - } - if (mon->error) { - error_set(&local_err, mon->error->err_class, "%s", - mon->error->err_msg); - } + cmd->mhandler.cmd_new(args, &data, &local_err); err_out: monitor_protocol_emitter(mon, data, local_err); @@ -5126,7 +5114,7 @@ static QObject *get_qmp_greeting(void) { QObject *ver = NULL; - qmp_marshal_input_query_version(NULL, NULL, &ver); + qmp_marshal_input_query_version(NULL, &ver, NULL); return qobject_from_jsonf("{'QMP':{'version': %p,'capabilities': []}}",ver); } -- cgit 1.4.1