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 Monitor *cur_mon = monitor_cur(); 73 MonitorQMP *mon; 74 75 assert(monitor_is_qmp(cur_mon)); 76 mon = container_of(cur_mon, MonitorQMP, common); 77 78 if (mon->commands == &qmp_commands) { 79 error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, 80 "Capabilities negotiation is already complete, command " 81 "ignored"); 82 return; 83 } 84 85 if (!qmp_caps_accept(mon, enable, errp)) { 86 return; 87 } 88 89 mon->commands = &qmp_commands; 90 } 91 92 VersionInfo *qmp_query_version(Error **errp) 93 { 94 VersionInfo *info = g_new0(VersionInfo, 1); 95 96 info->qemu = g_new0(VersionTriple, 1); 97 info->qemu->major = QEMU_VERSION_MAJOR; 98 info->qemu->minor = QEMU_VERSION_MINOR; 99 info->qemu->micro = QEMU_VERSION_MICRO; 100 info->package = g_strdup(QEMU_PKGVERSION); 101 102 return info; 103 } 104 105 static void query_commands_cb(const QmpCommand *cmd, void *opaque) 106 { 107 CommandInfo *info; 108 CommandInfoList **list = opaque; 109 110 if (!cmd->enabled) { 111 return; 112 } 113 114 info = g_malloc0(sizeof(*info)); 115 info->name = g_strdup(cmd->name); 116 QAPI_LIST_PREPEND(*list, info); 117 } 118 119 CommandInfoList *qmp_query_commands(Error **errp) 120 { 121 CommandInfoList *list = NULL; 122 Monitor *cur_mon = monitor_cur(); 123 MonitorQMP *mon; 124 125 assert(monitor_is_qmp(cur_mon)); 126 mon = container_of(cur_mon, MonitorQMP, common); 127 128 qmp_for_each_command(mon->commands, query_commands_cb, &list); 129 130 return list; 131 } 132 133 /* 134 * Minor hack: generated marshalling suppressed for this command 135 * ('gen': false in the schema) so we can parse the JSON string 136 * directly into QObject instead of first parsing it with 137 * visit_type_SchemaInfoList() into a SchemaInfoList, then marshal it 138 * to QObject with generated output marshallers, every time. Instead, 139 * we do it in test-qobject-input-visitor.c, just to make sure 140 * qapi-gen.py's output actually conforms to the schema. 141 */ 142 void qmp_query_qmp_schema(QDict *qdict, QObject **ret_data, 143 Error **errp) 144 { 145 *ret_data = qobject_from_qlit(&qmp_schema_qlit); 146 } 147