| /* |
| * 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/types.h" |
| #include "qapi/qmp/dispatch.h" |
| #include "qapi/qmp/json-parser.h" |
| #include "qapi-types.h" |
| #include "qapi/qmp/qerror.h" |
| |
| static 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; |
| |
| if (qobject_type(request) != QTYPE_QDICT) { |
| error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, |
| "request is not a dictionary"); |
| return NULL; |
| } |
| |
| dict = qobject_to_qdict(request); |
| |
| 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, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute", |
| "string"); |
| return NULL; |
| } |
| has_exec_key = true; |
| } else if (strcmp(arg_name, "arguments")) { |
| error_setg(errp, QERR_QMP_EXTRA_MEMBER, arg_name); |
| return NULL; |
| } |
| } |
| |
| if (!has_exec_key) { |
| error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute"); |
| return NULL; |
| } |
| |
| return dict; |
| } |
| |
| static QObject *do_qmp_dispatch(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(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"); |
| QINCREF(args); |
| } |
| |
| switch (cmd->type) { |
| case QCT_NORMAL: |
| 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()); |
| } |
| break; |
| } |
| |
| QDECREF(args); |
| |
| return ret; |
| } |
| |
| QObject *qmp_build_error_object(Error *err) |
| { |
| return qobject_from_jsonf("{ 'class': %s, 'desc': %s }", |
| QapiErrorClass_lookup[error_get_class(err)], |
| error_get_pretty(err)); |
| } |
| |
| QObject *qmp_dispatch(QObject *request) |
| { |
| Error *err = NULL; |
| QObject *ret; |
| QDict *rsp; |
| |
| ret = do_qmp_dispatch(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 { |
| QDECREF(rsp); |
| return NULL; |
| } |
| |
| return QOBJECT(rsp); |
| } |