Now that we can safely call QOBJECT() on QObject * as well as its subtypes, we can have macros qobject_ref() / qobject_unref() that work everywhere instead of having to use QINCREF() / QDECREF() for QObject and qobject_incref() / qobject_decref() for its subtypes. The replacement is mechanical, except I broke a long line, and added a cast in monitor_qmp_cleanup_req_queue_locked(). Unlike qobject_decref(), qobject_unref() doesn't accept void *. Note that the new macros evaluate their argument exactly once, thus no need to shout them. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180419150145.24795-4-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Rebased, semantic conflict resolved, commit message improved] Signed-off-by: Markus Armbruster <armbru@redhat.com>
175 lines
4.4 KiB
C
175 lines
4.4 KiB
C
/*
|
|
* Core Definitions for QAPI/QMP Dispatch
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/dispatch.h"
|
|
#include "qapi/qmp/json-parser.h"
|
|
#include "qapi/qmp/qdict.h"
|
|
#include "qapi/qmp/qjson.h"
|
|
#include "qapi/qmp/qbool.h"
|
|
|
|
QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp)
|
|
{
|
|
const QDictEntry *ent;
|
|
const char *arg_name;
|
|
const QObject *arg_obj;
|
|
bool has_exec_key = false;
|
|
QDict *dict = NULL;
|
|
|
|
dict = qobject_to(QDict, request);
|
|
if (!dict) {
|
|
error_setg(errp, "QMP input must be a JSON object");
|
|
return NULL;
|
|
}
|
|
|
|
for (ent = qdict_first(dict); ent;
|
|
ent = qdict_next(dict, ent)) {
|
|
arg_name = qdict_entry_key(ent);
|
|
arg_obj = qdict_entry_value(ent);
|
|
|
|
if (!strcmp(arg_name, "execute")) {
|
|
if (qobject_type(arg_obj) != QTYPE_QSTRING) {
|
|
error_setg(errp,
|
|
"QMP input member 'execute' must be a string");
|
|
return NULL;
|
|
}
|
|
has_exec_key = true;
|
|
} else if (!strcmp(arg_name, "arguments")) {
|
|
if (qobject_type(arg_obj) != QTYPE_QDICT) {
|
|
error_setg(errp,
|
|
"QMP input member 'arguments' must be an object");
|
|
return NULL;
|
|
}
|
|
} else if (!strcmp(arg_name, "id")) {
|
|
continue;
|
|
} else if (!strcmp(arg_name, "control")) {
|
|
if (qobject_type(arg_obj) != QTYPE_QDICT) {
|
|
error_setg(errp,
|
|
"QMP input member 'control' must be a dict");
|
|
return NULL;
|
|
}
|
|
} else {
|
|
error_setg(errp, "QMP input member '%s' is unexpected",
|
|
arg_name);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (!has_exec_key) {
|
|
error_setg(errp, "QMP input lacks member 'execute'");
|
|
return NULL;
|
|
}
|
|
|
|
return dict;
|
|
}
|
|
|
|
static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request,
|
|
Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
const char *command;
|
|
QDict *args, *dict;
|
|
QmpCommand *cmd;
|
|
QObject *ret = NULL;
|
|
|
|
dict = qmp_dispatch_check_obj(request, errp);
|
|
if (!dict) {
|
|
return NULL;
|
|
}
|
|
|
|
command = qdict_get_str(dict, "execute");
|
|
cmd = qmp_find_command(cmds, command);
|
|
if (cmd == NULL) {
|
|
error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
|
|
"The command %s has not been found", command);
|
|
return NULL;
|
|
}
|
|
if (!cmd->enabled) {
|
|
error_setg(errp, "The command %s has been disabled for this instance",
|
|
command);
|
|
return NULL;
|
|
}
|
|
|
|
if (!qdict_haskey(dict, "arguments")) {
|
|
args = qdict_new();
|
|
} else {
|
|
args = qdict_get_qdict(dict, "arguments");
|
|
qobject_ref(args);
|
|
}
|
|
|
|
cmd->fn(args, &ret, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
} else if (cmd->options & QCO_NO_SUCCESS_RESP) {
|
|
g_assert(!ret);
|
|
} else if (!ret) {
|
|
ret = QOBJECT(qdict_new());
|
|
}
|
|
|
|
qobject_unref(args);
|
|
|
|
return ret;
|
|
}
|
|
|
|
QObject *qmp_build_error_object(Error *err)
|
|
{
|
|
return qobject_from_jsonf("{ 'class': %s, 'desc': %s }",
|
|
QapiErrorClass_str(error_get_class(err)),
|
|
error_get_pretty(err));
|
|
}
|
|
|
|
/*
|
|
* Detect whether a request should be run out-of-band, by quickly
|
|
* peeking at whether we have: { "control": { "run-oob": true } }. By
|
|
* default commands are run in-band.
|
|
*/
|
|
bool qmp_is_oob(QDict *dict)
|
|
{
|
|
QBool *bool_obj;
|
|
|
|
dict = qdict_get_qdict(dict, "control");
|
|
if (!dict) {
|
|
return false;
|
|
}
|
|
|
|
bool_obj = qobject_to(QBool, qdict_get(dict, "run-oob"));
|
|
if (!bool_obj) {
|
|
return false;
|
|
}
|
|
|
|
return qbool_get_bool(bool_obj);
|
|
}
|
|
|
|
QObject *qmp_dispatch(QmpCommandList *cmds, QObject *request)
|
|
{
|
|
Error *err = NULL;
|
|
QObject *ret;
|
|
QDict *rsp;
|
|
|
|
ret = do_qmp_dispatch(cmds, request, &err);
|
|
|
|
rsp = qdict_new();
|
|
if (err) {
|
|
qdict_put_obj(rsp, "error", qmp_build_error_object(err));
|
|
error_free(err);
|
|
} else if (ret) {
|
|
qdict_put_obj(rsp, "return", ret);
|
|
} else {
|
|
qobject_unref(rsp);
|
|
return NULL;
|
|
}
|
|
|
|
return QOBJECT(rsp);
|
|
}
|