1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
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 "qemu/osdep.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);
}
|
