]>
Commit | Line | Data |
---|---|---|
ab02ab2a MR |
1 | /* |
2 | * Core Definitions for QAPI/QMP Dispatch | |
3 | * | |
4 | * Copyright IBM, Corp. 2011 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. | |
10 | * See the COPYING.LIB file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
cbf21151 | 14 | #include "qemu/osdep.h" |
da34e65c | 15 | #include "qapi/error.h" |
7b1b5d19 PB |
16 | #include "qapi/qmp/types.h" |
17 | #include "qapi/qmp/dispatch.h" | |
18 | #include "qapi/qmp/json-parser.h" | |
c7eb39cb | 19 | #include "qapi/qmp/qjson.h" |
93b91c59 | 20 | #include "qapi-types.h" |
7b1b5d19 | 21 | #include "qapi/qmp/qerror.h" |
ab02ab2a MR |
22 | |
23 | static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp) | |
24 | { | |
25 | const QDictEntry *ent; | |
26 | const char *arg_name; | |
27 | const QObject *arg_obj; | |
28 | bool has_exec_key = false; | |
29 | QDict *dict = NULL; | |
30 | ||
ca6b6e1e MA |
31 | dict = qobject_to_qdict(request); |
32 | if (!dict) { | |
c6bd8c70 MA |
33 | error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, |
34 | "request is not a dictionary"); | |
ab02ab2a MR |
35 | return NULL; |
36 | } | |
37 | ||
ab02ab2a MR |
38 | for (ent = qdict_first(dict); ent; |
39 | ent = qdict_next(dict, ent)) { | |
40 | arg_name = qdict_entry_key(ent); | |
41 | arg_obj = qdict_entry_value(ent); | |
42 | ||
43 | if (!strcmp(arg_name, "execute")) { | |
44 | if (qobject_type(arg_obj) != QTYPE_QSTRING) { | |
c6bd8c70 MA |
45 | error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute", |
46 | "string"); | |
ab02ab2a MR |
47 | return NULL; |
48 | } | |
49 | has_exec_key = true; | |
50 | } else if (strcmp(arg_name, "arguments")) { | |
c6bd8c70 | 51 | error_setg(errp, QERR_QMP_EXTRA_MEMBER, arg_name); |
ab02ab2a MR |
52 | return NULL; |
53 | } | |
54 | } | |
55 | ||
56 | if (!has_exec_key) { | |
c6bd8c70 | 57 | error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute"); |
ab02ab2a MR |
58 | return NULL; |
59 | } | |
60 | ||
61 | return dict; | |
62 | } | |
63 | ||
64 | static QObject *do_qmp_dispatch(QObject *request, Error **errp) | |
65 | { | |
ee16ce93 | 66 | Error *local_err = NULL; |
ab02ab2a MR |
67 | const char *command; |
68 | QDict *args, *dict; | |
69 | QmpCommand *cmd; | |
70 | QObject *ret = NULL; | |
71 | ||
ab02ab2a | 72 | dict = qmp_dispatch_check_obj(request, errp); |
4af8be1f | 73 | if (!dict) { |
ab02ab2a MR |
74 | return NULL; |
75 | } | |
76 | ||
77 | command = qdict_get_str(dict, "execute"); | |
78 | cmd = qmp_find_command(command); | |
79 | if (cmd == NULL) { | |
a6c90cbc MA |
80 | error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, |
81 | "The command %s has not been found", command); | |
ab02ab2a MR |
82 | return NULL; |
83 | } | |
abd6cf6d | 84 | if (!cmd->enabled) { |
f231b88d CR |
85 | error_setg(errp, "The command %s has been disabled for this instance", |
86 | command); | |
abd6cf6d MR |
87 | return NULL; |
88 | } | |
ab02ab2a MR |
89 | |
90 | if (!qdict_haskey(dict, "arguments")) { | |
91 | args = qdict_new(); | |
92 | } else { | |
93 | args = qdict_get_qdict(dict, "arguments"); | |
94 | QINCREF(args); | |
95 | } | |
96 | ||
42a502a7 EB |
97 | cmd->fn(args, &ret, &local_err); |
98 | if (local_err) { | |
99 | error_propagate(errp, local_err); | |
100 | } else if (cmd->options & QCO_NO_SUCCESS_RESP) { | |
101 | g_assert(!ret); | |
102 | } else if (!ret) { | |
103 | ret = QOBJECT(qdict_new()); | |
ab02ab2a MR |
104 | } |
105 | ||
106 | QDECREF(args); | |
107 | ||
108 | return ret; | |
109 | } | |
110 | ||
e940f543 | 111 | QObject *qmp_build_error_object(Error *err) |
93b91c59 LC |
112 | { |
113 | return qobject_from_jsonf("{ 'class': %s, 'desc': %s }", | |
f22a28b8 | 114 | QapiErrorClass_lookup[error_get_class(err)], |
e940f543 | 115 | error_get_pretty(err)); |
93b91c59 LC |
116 | } |
117 | ||
ab02ab2a MR |
118 | QObject *qmp_dispatch(QObject *request) |
119 | { | |
120 | Error *err = NULL; | |
121 | QObject *ret; | |
122 | QDict *rsp; | |
123 | ||
124 | ret = do_qmp_dispatch(request, &err); | |
125 | ||
126 | rsp = qdict_new(); | |
127 | if (err) { | |
93b91c59 | 128 | qdict_put_obj(rsp, "error", qmp_build_error_object(err)); |
ab02ab2a MR |
129 | error_free(err); |
130 | } else if (ret) { | |
131 | qdict_put_obj(rsp, "return", ret); | |
132 | } else { | |
133 | QDECREF(rsp); | |
134 | return NULL; | |
135 | } | |
136 | ||
137 | return QOBJECT(rsp); | |
138 | } |