qmp.c

   1 /*
   2  * QEMU Management Protocol
   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 GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu-common.h"
  17 #include "sysemu.h"
  18 #include "qmp-commands.h"
  19 #include "kvm.h"
  20 #include "arch_init.h"
  21 #include "hw/qdev.h"
  22 #include "qapi/qmp-input-visitor.h"
  23 #include "qapi/qmp-output-visitor.h"
  24
  25 NameInfo *qmp_query_name(Error **errp)
  26 {
  27     NameInfo *info = g_malloc0(sizeof(*info));
  28
  29     if (qemu_name) {
  30         info->has_name = true;
  31         info->name = g_strdup(qemu_name);
  32     }
  33
  34     return info;
  35 }
  36
  37 VersionInfo *qmp_query_version(Error **err)
  38 {
  39     VersionInfo *info = g_malloc0(sizeof(*info));
  40     const char *version = QEMU_VERSION;
  41     char *tmp;
  42
  43     info->qemu.major = strtol(version, &tmp, 10);
  44     tmp++;
  45     info->qemu.minor = strtol(tmp, &tmp, 10);
  46     tmp++;
  47     info->qemu.micro = strtol(tmp, &tmp, 10);
  48     info->package = g_strdup(QEMU_PKGVERSION);
  49
  50     return info;
  51 }
  52
  53 KvmInfo *qmp_query_kvm(Error **errp)
  54 {
  55     KvmInfo *info = g_malloc0(sizeof(*info));
  56
  57     info->enabled = kvm_enabled();
  58     info->present = kvm_available();
  59
  60     return info;
  61 }
  62
  63 UuidInfo *qmp_query_uuid(Error **errp)
  64 {
  65     UuidInfo *info = g_malloc0(sizeof(*info));
  66     char uuid[64];
  67
  68     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  69                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  70                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  71                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  72                    qemu_uuid[14], qemu_uuid[15]);
  73
  74     info->UUID = g_strdup(uuid);
  75     return info;
  76 }
  77
  78 void qmp_quit(Error **err)
  79 {
  80     no_shutdown = 0;
  81     qemu_system_shutdown_request();
  82 }
  83
  84 void qmp_stop(Error **errp)
  85 {
  86     vm_stop(RUN_STATE_PAUSED);
  87 }
  88
  89 void qmp_system_reset(Error **errp)
  90 {
  91     qemu_system_reset_request();
  92 }
  93
  94 void qmp_system_powerdown(Error **erp)
  95 {
  96     qemu_system_powerdown_request();
  97 }
  98
  99 void qmp_cpu(int64_t index, Error **errp)
 100 {
 101     /* Just do nothing */
 102 }
 103
 104 #ifndef CONFIG_VNC
 105 /* If VNC support is enabled, the "true" query-vnc command is
 106    defined in the VNC subsystem */
 107 VncInfo *qmp_query_vnc(Error **errp)
 108 {
 109     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 110     return NULL;
 111 };
 112 #endif
 113
 114 #ifndef CONFIG_SPICE
 115 /* If SPICE support is enabled, the "true" query-spice command is
 116    defined in the SPICE subsystem. Also note that we use a small
 117    trick to maintain query-spice's original behavior, which is not
 118    to be available in the namespace if SPICE is not compiled in */
 119 SpiceInfo *qmp_query_spice(Error **errp)
 120 {
 121     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 122     return NULL;
 123 };
 124 #endif
 125
 126 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 127 {
 128     bdrv_iostatus_reset(bs);
 129 }
 130
 131 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 132 {
 133     Error **err = opaque;
 134
 135     if (!error_is_set(err) && bdrv_key_required(bs)) {
 136         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs));
 137     }
 138 }
 139
 140 void qmp_cont(Error **errp)
 141 {
 142     Error *local_err = NULL;
 143
 144     if (runstate_check(RUN_STATE_INMIGRATE)) {
 145         error_set(errp, QERR_MIGRATION_EXPECTED);
 146         return;
 147     } else if (runstate_check(RUN_STATE_INTERNAL_ERROR) ||
 148                runstate_check(RUN_STATE_SHUTDOWN)) {
 149         error_set(errp, QERR_RESET_REQUIRED);
 150         return;
 151     }
 152
 153     bdrv_iterate(iostatus_bdrv_it, NULL);
 154     bdrv_iterate(encrypted_bdrv_it, &local_err);
 155     if (local_err) {
 156         error_propagate(errp, local_err);
 157         return;
 158     }
 159
 160     vm_start();
 161 }
 162
 163 DevicePropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 164 {
 165     DeviceState *dev;
 166     bool ambiguous = false;
 167     DevicePropertyInfoList *props = NULL;
 168     DeviceProperty *prop;
 169
 170     dev = qdev_resolve_path(path, &ambiguous);
 171     if (dev == NULL) {
 172         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 173         return NULL;
 174     }
 175
 176     QTAILQ_FOREACH(prop, &dev->properties, node) {
 177         DevicePropertyInfoList *entry = g_malloc0(sizeof(*entry));
 178
 179         entry->value = g_malloc0(sizeof(DevicePropertyInfo));
 180         entry->next = props;
 181         props = entry;
 182
 183         entry->value->name = g_strdup(prop->name);
 184         entry->value->type = g_strdup(prop->type);
 185     }
 186
 187     return props;
 188 }
 189
 190 /* FIXME: teach qapi about how to pass through Visitors */
 191 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 192 {
 193     const char *path = qdict_get_str(qdict, "path");
 194     const char *property = qdict_get_str(qdict, "property");
 195     QObject *value = qdict_get(qdict, "value");
 196     Error *local_err = NULL;
 197     QmpInputVisitor *mi;
 198     DeviceState *dev;
 199
 200     dev = qdev_resolve_path(path, NULL);
 201     if (!dev) {
 202         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 203         goto out;
 204     }
 205
 206     mi = qmp_input_visitor_new(value);
 207     qdev_property_set(dev, qmp_input_get_visitor(mi), property, &local_err);
 208
 209     qmp_input_visitor_cleanup(mi);
 210
 211 out:
 212     if (local_err) {
 213         qerror_report_err(local_err);
 214         error_free(local_err);
 215         return -1;
 216     }
 217
 218     return 0;
 219 }
 220
 221 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 222 {
 223     const char *path = qdict_get_str(qdict, "path");
 224     const char *property = qdict_get_str(qdict, "property");
 225     Error *local_err = NULL;
 226     QmpOutputVisitor *mo;
 227     DeviceState *dev;
 228
 229     dev = qdev_resolve_path(path, NULL);
 230     if (!dev) {
 231         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 232         goto out;
 233     }
 234
 235     mo = qmp_output_visitor_new();
 236     qdev_property_get(dev, qmp_output_get_visitor(mo), property, &local_err);
 237     if (!local_err) {
 238         *ret = qmp_output_get_qobject(mo);
 239     }
 240
 241     qmp_output_visitor_cleanup(mo);
 242
 243 out:
 244     if (local_err) {
 245         qerror_report_err(local_err);
 246         error_free(local_err);
 247         return -1;
 248     }
 249
 250     return 0;
 251 }