Michael Roth | ab02ab2 | 2011-07-19 14:50:37 -0500 | [diff] [blame] | 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 | |
| 14 | #include "qemu-objects.h" |
| 15 | #include "qapi/qmp-core.h" |
| 16 | #include "json-parser.h" |
| 17 | #include "error.h" |
| 18 | #include "error_int.h" |
| 19 | #include "qerror.h" |
| 20 | |
| 21 | static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp) |
| 22 | { |
| 23 | const QDictEntry *ent; |
| 24 | const char *arg_name; |
| 25 | const QObject *arg_obj; |
| 26 | bool has_exec_key = false; |
| 27 | QDict *dict = NULL; |
| 28 | |
| 29 | if (qobject_type(request) != QTYPE_QDICT) { |
| 30 | error_set(errp, QERR_QMP_BAD_INPUT_OBJECT, |
| 31 | "request is not a dictionary"); |
| 32 | return NULL; |
| 33 | } |
| 34 | |
| 35 | dict = qobject_to_qdict(request); |
| 36 | |
| 37 | for (ent = qdict_first(dict); ent; |
| 38 | ent = qdict_next(dict, ent)) { |
| 39 | arg_name = qdict_entry_key(ent); |
| 40 | arg_obj = qdict_entry_value(ent); |
| 41 | |
| 42 | if (!strcmp(arg_name, "execute")) { |
| 43 | if (qobject_type(arg_obj) != QTYPE_QSTRING) { |
| 44 | error_set(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute", |
| 45 | "string"); |
| 46 | return NULL; |
| 47 | } |
| 48 | has_exec_key = true; |
| 49 | } else if (strcmp(arg_name, "arguments")) { |
| 50 | error_set(errp, QERR_QMP_EXTRA_MEMBER, arg_name); |
| 51 | return NULL; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | if (!has_exec_key) { |
| 56 | error_set(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute"); |
| 57 | return NULL; |
| 58 | } |
| 59 | |
| 60 | return dict; |
| 61 | } |
| 62 | |
| 63 | static QObject *do_qmp_dispatch(QObject *request, Error **errp) |
| 64 | { |
| 65 | const char *command; |
| 66 | QDict *args, *dict; |
| 67 | QmpCommand *cmd; |
| 68 | QObject *ret = NULL; |
| 69 | |
| 70 | |
| 71 | dict = qmp_dispatch_check_obj(request, errp); |
| 72 | if (!dict || error_is_set(errp)) { |
| 73 | return NULL; |
| 74 | } |
| 75 | |
| 76 | command = qdict_get_str(dict, "execute"); |
| 77 | cmd = qmp_find_command(command); |
| 78 | if (cmd == NULL) { |
| 79 | error_set(errp, QERR_COMMAND_NOT_FOUND, command); |
| 80 | return NULL; |
| 81 | } |
Michael Roth | abd6cf6 | 2011-12-06 22:03:42 -0600 | [diff] [blame] | 82 | if (!cmd->enabled) { |
| 83 | error_set(errp, QERR_COMMAND_DISABLED, command); |
| 84 | return NULL; |
| 85 | } |
Michael Roth | ab02ab2 | 2011-07-19 14:50:37 -0500 | [diff] [blame] | 86 | |
| 87 | if (!qdict_haskey(dict, "arguments")) { |
| 88 | args = qdict_new(); |
| 89 | } else { |
| 90 | args = qdict_get_qdict(dict, "arguments"); |
| 91 | QINCREF(args); |
| 92 | } |
| 93 | |
| 94 | switch (cmd->type) { |
| 95 | case QCT_NORMAL: |
| 96 | cmd->fn(args, &ret, errp); |
Luiz Capitulino | d34b867 | 2012-05-08 14:24:44 -0300 | [diff] [blame] | 97 | if (!error_is_set(errp)) { |
| 98 | if (cmd->options & QCO_NO_SUCCESS_RESP) { |
| 99 | g_assert(!ret); |
| 100 | } else if (!ret) { |
| 101 | ret = QOBJECT(qdict_new()); |
| 102 | } |
Michael Roth | ab02ab2 | 2011-07-19 14:50:37 -0500 | [diff] [blame] | 103 | } |
| 104 | break; |
| 105 | } |
| 106 | |
| 107 | QDECREF(args); |
| 108 | |
| 109 | return ret; |
| 110 | } |
| 111 | |
| 112 | QObject *qmp_dispatch(QObject *request) |
| 113 | { |
| 114 | Error *err = NULL; |
| 115 | QObject *ret; |
| 116 | QDict *rsp; |
| 117 | |
| 118 | ret = do_qmp_dispatch(request, &err); |
| 119 | |
| 120 | rsp = qdict_new(); |
| 121 | if (err) { |
| 122 | qdict_put_obj(rsp, "error", error_get_qobject(err)); |
| 123 | error_free(err); |
| 124 | } else if (ret) { |
| 125 | qdict_put_obj(rsp, "return", ret); |
| 126 | } else { |
| 127 | QDECREF(rsp); |
| 128 | return NULL; |
| 129 | } |
| 130 | |
| 131 | return QOBJECT(rsp); |
| 132 | } |