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-rw-r--r--qemu/qapi/qmp-dispatch.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/qemu/qapi/qmp-dispatch.c b/qemu/qapi/qmp-dispatch.c
new file mode 100644
index 000000000..7bcc86080
--- /dev/null
+++ b/qemu/qapi/qmp-dispatch.c
@@ -0,0 +1,141 @@
+/*
+ * 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 "qapi/qmp/types.h"
+#include "qapi/qmp/dispatch.h"
+#include "qapi/qmp/json-parser.h"
+#include "qapi-types.h"
+#include "qapi/error.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 }",
+ ErrorClass_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);
+}