1 /* 2 * QMP commands related to the monitor (common to sysemu and tools) 3 * 4 * Copyright (c) 2003-2004 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 27 #include "monitor-internal.h" 28 #include "qemu-version.h" 29 #include "qapi/error.h" 30 #include "qapi/qapi-commands-control.h" 31 #include "qapi/qapi-emit-events.h" 32 #include "qapi/qapi-introspect.h" 33 34 /* 35 * Accept QMP capabilities in @list for @mon. 36 * On success, set mon->qmp.capab[], and return true. 37 * On error, set @errp, and return false. 38 */ 39 static bool qmp_caps_accept(MonitorQMP *mon, QMPCapabilityList *list, 40 Error **errp) 41 { 42 GString *unavailable = NULL; 43 bool capab[QMP_CAPABILITY__MAX]; 44 45 memset(capab, 0, sizeof(capab)); 46 47 for (; list; list = list->next) { 48 if (!mon->capab_offered[list->value]) { 49 if (!unavailable) { 50 unavailable = g_string_new(QMPCapability_str(list->value)); 51 } else { 52 g_string_append_printf(unavailable, ", %s", 53 QMPCapability_str(list->value)); 54 } 55 } 56 capab[list->value] = true; 57 } 58 59 if (unavailable) { 60 error_setg(errp, "Capability %s not available", unavailable->str); 61 g_string_free(unavailable, true); 62 return false; 63 } 64 65 memcpy(mon->capab, capab, sizeof(capab)); 66 return true; 67 } 68 69 void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable, 70 Error **errp) 71 { 72 MonitorQMP *mon; 73 74 assert(monitor_is_qmp(cur_mon)); 75 mon = container_of(cur_mon, MonitorQMP, common); 76 77 if (mon->commands == &qmp_commands) { 78 error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, 79 "Capabilities negotiation is already complete, command " 80 "ignored"); 81 return; 82 } 83 84 if (!qmp_caps_accept(mon, enable, errp)) { 85 return; 86 } 87 88 mon->commands = &qmp_commands; 89 } 90 91 VersionInfo *qmp_query_version(Error **errp) 92 { 93 VersionInfo *info = g_new0(VersionInfo, 1); 94 95 info->qemu = g_new0(VersionTriple, 1); 96 info->qemu->major = QEMU_VERSION_MAJOR; 97 info->qemu->minor = QEMU_VERSION_MINOR; 98 info->qemu->micro = QEMU_VERSION_MICRO; 99 info->package = g_strdup(QEMU_PKGVERSION); 100 101 return info; 102 } 103 104 static void query_commands_cb(const QmpCommand *cmd, void *opaque) 105 { 106 CommandInfoList *info, **list = opaque; 107 108 if (!cmd->enabled) { 109 return; 110 } 111 112 info = g_malloc0(sizeof(*info)); 113 info->value = g_malloc0(sizeof(*info->value)); 114 info->value->name = g_strdup(cmd->name); 115 info->next = *list; 116 *list = info; 117 } 118 119 CommandInfoList *qmp_query_commands(Error **errp) 120 { 121 CommandInfoList *list = NULL; 122 MonitorQMP *mon; 123 124 assert(monitor_is_qmp(cur_mon)); 125 mon = container_of(cur_mon, MonitorQMP, common); 126 127 qmp_for_each_command(mon->commands, query_commands_cb, &list); 128 129 return list; 130 } 131 132 EventInfoList *qmp_query_events(Error **errp) 133 { 134 /* 135 * TODO This deprecated command is the only user of 136 * QAPIEvent_str() and QAPIEvent_lookup[]. When the command goes, 137 * they should go, too. 138 */ 139 EventInfoList *info, *ev_list = NULL; 140 QAPIEvent e; 141 142 for (e = 0 ; e < QAPI_EVENT__MAX ; e++) { 143 const char *event_name = QAPIEvent_str(e); 144 assert(event_name != NULL); 145 info = g_malloc0(sizeof(*info)); 146 info->value = g_malloc0(sizeof(*info->value)); 147 info->value->name = g_strdup(event_name); 148 149 info->next = ev_list; 150 ev_list = info; 151 } 152 153 return ev_list; 154 } 155 156 /* 157 * Minor hack: generated marshalling suppressed for this command 158 * ('gen': false in the schema) so we can parse the JSON string 159 * directly into QObject instead of first parsing it with 160 * visit_type_SchemaInfoList() into a SchemaInfoList, then marshal it 161 * to QObject with generated output marshallers, every time. Instead, 162 * we do it in test-qobject-input-visitor.c, just to make sure 163 * qapi-gen.py's output actually conforms to the schema. 164 */ 165 void qmp_query_qmp_schema(QDict *qdict, QObject **ret_data, 166 Error **errp) 167 { 168 *ret_data = qobject_from_qlit(&qmp_schema_qlit); 169 } 170