root / qapi / qmp-dispatch.c @ 0056c093
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/*
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* Core Definitions for QAPI/QMP Dispatch
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qemu-objects.h" |
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#include "qapi/qmp-core.h" |
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#include "json-parser.h" |
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#include "error.h" |
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#include "error_int.h" |
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#include "qerror.h" |
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static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp) |
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{ |
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const QDictEntry *ent;
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const char *arg_name; |
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const QObject *arg_obj;
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bool has_exec_key = false; |
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QDict *dict = NULL;
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if (qobject_type(request) != QTYPE_QDICT) {
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error_set(errp, QERR_QMP_BAD_INPUT_OBJECT, |
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"request is not a dictionary");
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return NULL; |
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} |
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dict = qobject_to_qdict(request); |
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for (ent = qdict_first(dict); ent;
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ent = qdict_next(dict, ent)) { |
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arg_name = qdict_entry_key(ent); |
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arg_obj = qdict_entry_value(ent); |
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if (!strcmp(arg_name, "execute")) { |
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if (qobject_type(arg_obj) != QTYPE_QSTRING) {
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error_set(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute",
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"string");
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return NULL; |
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} |
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has_exec_key = true;
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} else if (strcmp(arg_name, "arguments")) { |
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error_set(errp, QERR_QMP_EXTRA_MEMBER, arg_name); |
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return NULL; |
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} |
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} |
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if (!has_exec_key) {
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error_set(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute");
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return NULL; |
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} |
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return dict;
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} |
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static QObject *do_qmp_dispatch(QObject *request, Error **errp)
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{ |
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const char *command; |
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QDict *args, *dict; |
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QmpCommand *cmd; |
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QObject *ret = NULL;
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dict = qmp_dispatch_check_obj(request, errp); |
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if (!dict || error_is_set(errp)) {
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return NULL; |
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} |
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command = qdict_get_str(dict, "execute");
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cmd = qmp_find_command(command); |
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if (cmd == NULL) { |
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error_set(errp, QERR_COMMAND_NOT_FOUND, command); |
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return NULL; |
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} |
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if (!cmd->enabled) {
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error_set(errp, QERR_COMMAND_DISABLED, command); |
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return NULL; |
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} |
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if (!qdict_haskey(dict, "arguments")) { |
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args = qdict_new(); |
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} else {
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args = qdict_get_qdict(dict, "arguments");
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QINCREF(args); |
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} |
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switch (cmd->type) {
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case QCT_NORMAL:
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cmd->fn(args, &ret, errp); |
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if (!error_is_set(errp) && ret == NULL) { |
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ret = QOBJECT(qdict_new()); |
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} |
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break;
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} |
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QDECREF(args); |
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return ret;
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} |
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QObject *qmp_dispatch(QObject *request) |
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{ |
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Error *err = NULL;
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QObject *ret; |
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QDict *rsp; |
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ret = do_qmp_dispatch(request, &err); |
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rsp = qdict_new(); |
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if (err) {
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qdict_put_obj(rsp, "error", error_get_qobject(err));
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error_free(err); |
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} else if (ret) { |
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qdict_put_obj(rsp, "return", ret);
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} else {
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QDECREF(rsp); |
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return NULL; |
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} |
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return QOBJECT(rsp);
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} |