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/osdep.h"
  17 #include "qemu-version.h"
  18 #include "qemu/cutils.h"
  19 #include "qemu/option.h"
  20 #include "monitor/monitor.h"
  21 #include "sysemu/sysemu.h"
  22 #include "qemu/config-file.h"
  23 #include "qemu/uuid.h"
  24 #include "chardev/char.h"
  25 #include "ui/qemu-spice.h"
  26 #include "ui/vnc.h"
  27 #include "sysemu/kvm.h"
  28 #include "sysemu/arch_init.h"
  29 #include "hw/qdev.h"
  30 #include "sysemu/blockdev.h"
  31 #include "sysemu/block-backend.h"
  32 #include "qom/qom-qobject.h"
  33 #include "qapi/error.h"
  34 #include "qapi/qapi-commands-block-core.h"
  35 #include "qapi/qapi-commands-misc.h"
  36 #include "qapi/qapi-commands-ui.h"
  37 #include "qapi/qmp/qdict.h"
  38 #include "qapi/qmp/qerror.h"
  39 #include "qapi/qobject-input-visitor.h"
  40 #include "hw/boards.h"
  41 #include "qom/object_interfaces.h"
  42 #include "hw/mem/memory-device.h"
  43 #include "hw/acpi/acpi_dev_interface.h"
  44
  45 NameInfo *qmp_query_name(Error **errp)
  46 {
  47     NameInfo *info = g_malloc0(sizeof(*info));
  48
  49     if (qemu_name) {
  50         info->has_name = true;
  51         info->name = g_strdup(qemu_name);
  52     }
  53
  54     return info;
  55 }
  56
  57 VersionInfo *qmp_query_version(Error **errp)
  58 {
  59     VersionInfo *info = g_new0(VersionInfo, 1);
  60
  61     info->qemu = g_new0(VersionTriple, 1);
  62     info->qemu->major = QEMU_VERSION_MAJOR;
  63     info->qemu->minor = QEMU_VERSION_MINOR;
  64     info->qemu->micro = QEMU_VERSION_MICRO;
  65     info->package = g_strdup(QEMU_PKGVERSION);
  66
  67     return info;
  68 }
  69
  70 KvmInfo *qmp_query_kvm(Error **errp)
  71 {
  72     KvmInfo *info = g_malloc0(sizeof(*info));
  73
  74     info->enabled = kvm_enabled();
  75     info->present = kvm_available();
  76
  77     return info;
  78 }
  79
  80 UuidInfo *qmp_query_uuid(Error **errp)
  81 {
  82     UuidInfo *info = g_malloc0(sizeof(*info));
  83
  84     info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
  85     return info;
  86 }
  87
  88 void qmp_quit(Error **errp)
  89 {
  90     no_shutdown = 0;
  91     qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_QMP);
  92 }
  93
  94 void qmp_stop(Error **errp)
  95 {
  96     /* if there is a dump in background, we should wait until the dump
  97      * finished */
  98     if (dump_in_progress()) {
  99         error_setg(errp, "There is a dump in process, please wait.");
 100         return;
 101     }
 102
 103     if (runstate_check(RUN_STATE_INMIGRATE)) {
 104         autostart = 0;
 105     } else {
 106         vm_stop(RUN_STATE_PAUSED);
 107     }
 108 }
 109
 110 void qmp_system_reset(Error **errp)
 111 {
 112     qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP);
 113 }
 114
 115 void qmp_system_powerdown(Error **erp)
 116 {
 117     qemu_system_powerdown_request();
 118 }
 119
 120 void qmp_cpu_add(int64_t id, Error **errp)
 121 {
 122     MachineClass *mc;
 123
 124     mc = MACHINE_GET_CLASS(current_machine);
 125     if (mc->hot_add_cpu) {
 126         mc->hot_add_cpu(id, errp);
 127     } else {
 128         error_setg(errp, "Not supported");
 129     }
 130 }
 131
 132 #ifndef CONFIG_VNC
 133 /* If VNC support is enabled, the "true" query-vnc command is
 134    defined in the VNC subsystem */
 135 VncInfo *qmp_query_vnc(Error **errp)
 136 {
 137     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 138     return NULL;
 139 };
 140
 141 VncInfo2List *qmp_query_vnc_servers(Error **errp)
 142 {
 143     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 144     return NULL;
 145 };
 146 #endif
 147
 148 #ifndef CONFIG_SPICE
 149 /*
 150  * qmp_unregister_commands_hack() ensures that QMP command query-spice
 151  * exists only #ifdef CONFIG_SPICE.  Necessary for an accurate
 152  * query-commands result.  However, the QAPI schema is blissfully
 153  * unaware of that, and the QAPI code generator happily generates a
 154  * dead qmp_marshal_query_spice() that calls qmp_query_spice().
 155  * Provide it one, or else linking fails.  FIXME Educate the QAPI
 156  * schema on CONFIG_SPICE.
 157  */
 158 SpiceInfo *qmp_query_spice(Error **errp)
 159 {
 160     abort();
 161 };
 162 #endif
 163
 164 void qmp_exit_preconfig(Error **errp)
 165 {
 166     if (!runstate_check(RUN_STATE_PRECONFIG)) {
 167         error_setg(errp, "The command is permitted only in '%s' state",
 168                    RunState_str(RUN_STATE_PRECONFIG));
 169         return;
 170     }
 171     qemu_exit_preconfig_request();
 172 }
 173
 174 void qmp_cont(Error **errp)
 175 {
 176     BlockBackend *blk;
 177     Error *local_err = NULL;
 178
 179     /* if there is a dump in background, we should wait until the dump
 180      * finished */
 181     if (dump_in_progress()) {
 182         error_setg(errp, "There is a dump in process, please wait.");
 183         return;
 184     }
 185
 186     if (runstate_needs_reset()) {
 187         error_setg(errp, "Resetting the Virtual Machine is required");
 188         return;
 189     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 190         return;
 191     }
 192
 193     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 194         blk_iostatus_reset(blk);
 195     }
 196
 197     /* Continuing after completed migration. Images have been inactivated to
 198      * allow the destination to take control. Need to get control back now.
 199      *
 200      * If there are no inactive block nodes (e.g. because the VM was just
 201      * paused rather than completing a migration), bdrv_inactivate_all() simply
 202      * doesn't do anything. */
 203     bdrv_invalidate_cache_all(&local_err);
 204     if (local_err) {
 205         error_propagate(errp, local_err);
 206         return;
 207     }
 208
 209     if (runstate_check(RUN_STATE_INMIGRATE)) {
 210         autostart = 1;
 211     } else {
 212         vm_start();
 213     }
 214 }
 215
 216 void qmp_system_wakeup(Error **errp)
 217 {
 218     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 219 }
 220
 221 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 222 {
 223     Object *obj;
 224     bool ambiguous = false;
 225     ObjectPropertyInfoList *props = NULL;
 226     ObjectProperty *prop;
 227     ObjectPropertyIterator iter;
 228
 229     obj = object_resolve_path(path, &ambiguous);
 230     if (obj == NULL) {
 231         if (ambiguous) {
 232             error_setg(errp, "Path '%s' is ambiguous", path);
 233         } else {
 234             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 235                       "Device '%s' not found", path);
 236         }
 237         return NULL;
 238     }
 239
 240     object_property_iter_init(&iter, obj);
 241     while ((prop = object_property_iter_next(&iter))) {
 242         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 243
 244         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 245         entry->next = props;
 246         props = entry;
 247
 248         entry->value->name = g_strdup(prop->name);
 249         entry->value->type = g_strdup(prop->type);
 250     }
 251
 252     return props;
 253 }
 254
 255 void qmp_qom_set(const char *path, const char *property, QObject *value,
 256                  Error **errp)
 257 {
 258     Object *obj;
 259
 260     obj = object_resolve_path(path, NULL);
 261     if (!obj) {
 262         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 263                   "Device '%s' not found", path);
 264         return;
 265     }
 266
 267     object_property_set_qobject(obj, value, property, errp);
 268 }
 269
 270 QObject *qmp_qom_get(const char *path, const char *property, Error **errp)
 271 {
 272     Object *obj;
 273
 274     obj = object_resolve_path(path, NULL);
 275     if (!obj) {
 276         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 277                   "Device '%s' not found", path);
 278         return NULL;
 279     }
 280
 281     return object_property_get_qobject(obj, property, errp);
 282 }
 283
 284 void qmp_set_password(const char *protocol, const char *password,
 285                       bool has_connected, const char *connected, Error **errp)
 286 {
 287     int disconnect_if_connected = 0;
 288     int fail_if_connected = 0;
 289     int rc;
 290
 291     if (has_connected) {
 292         if (strcmp(connected, "fail") == 0) {
 293             fail_if_connected = 1;
 294         } else if (strcmp(connected, "disconnect") == 0) {
 295             disconnect_if_connected = 1;
 296         } else if (strcmp(connected, "keep") == 0) {
 297             /* nothing */
 298         } else {
 299             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 300             return;
 301         }
 302     }
 303
 304     if (strcmp(protocol, "spice") == 0) {
 305         if (!qemu_using_spice(errp)) {
 306             return;
 307         }
 308         rc = qemu_spice_set_passwd(password, fail_if_connected,
 309                                    disconnect_if_connected);
 310         if (rc != 0) {
 311             error_setg(errp, QERR_SET_PASSWD_FAILED);
 312         }
 313         return;
 314     }
 315
 316     if (strcmp(protocol, "vnc") == 0) {
 317         if (fail_if_connected || disconnect_if_connected) {
 318             /* vnc supports "connected=keep" only */
 319             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 320             return;
 321         }
 322         /* Note that setting an empty password will not disable login through
 323          * this interface. */
 324         rc = vnc_display_password(NULL, password);
 325         if (rc < 0) {
 326             error_setg(errp, QERR_SET_PASSWD_FAILED);
 327         }
 328         return;
 329     }
 330
 331     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 332 }
 333
 334 void qmp_expire_password(const char *protocol, const char *whenstr,
 335                          Error **errp)
 336 {
 337     time_t when;
 338     int rc;
 339
 340     if (strcmp(whenstr, "now") == 0) {
 341         when = 0;
 342     } else if (strcmp(whenstr, "never") == 0) {
 343         when = TIME_MAX;
 344     } else if (whenstr[0] == '+') {
 345         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 346     } else {
 347         when = strtoull(whenstr, NULL, 10);
 348     }
 349
 350     if (strcmp(protocol, "spice") == 0) {
 351         if (!qemu_using_spice(errp)) {
 352             return;
 353         }
 354         rc = qemu_spice_set_pw_expire(when);
 355         if (rc != 0) {
 356             error_setg(errp, QERR_SET_PASSWD_FAILED);
 357         }
 358         return;
 359     }
 360
 361     if (strcmp(protocol, "vnc") == 0) {
 362         rc = vnc_display_pw_expire(NULL, when);
 363         if (rc != 0) {
 364             error_setg(errp, QERR_SET_PASSWD_FAILED);
 365         }
 366         return;
 367     }
 368
 369     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 370 }
 371
 372 #ifdef CONFIG_VNC
 373 void qmp_change_vnc_password(const char *password, Error **errp)
 374 {
 375     if (vnc_display_password(NULL, password) < 0) {
 376         error_setg(errp, QERR_SET_PASSWD_FAILED);
 377     }
 378 }
 379
 380 static void qmp_change_vnc_listen(const char *target, Error **errp)
 381 {
 382     QemuOptsList *olist = qemu_find_opts("vnc");
 383     QemuOpts *opts;
 384
 385     if (strstr(target, "id=")) {
 386         error_setg(errp, "id not supported");
 387         return;
 388     }
 389
 390     opts = qemu_opts_find(olist, "default");
 391     if (opts) {
 392         qemu_opts_del(opts);
 393     }
 394     opts = vnc_parse(target, errp);
 395     if (!opts) {
 396         return;
 397     }
 398
 399     vnc_display_open("default", errp);
 400 }
 401
 402 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 403                            Error **errp)
 404 {
 405     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 406         if (!has_arg) {
 407             error_setg(errp, QERR_MISSING_PARAMETER, "password");
 408         } else {
 409             qmp_change_vnc_password(arg, errp);
 410         }
 411     } else {
 412         qmp_change_vnc_listen(target, errp);
 413     }
 414 }
 415 #else
 416 void qmp_change_vnc_password(const char *password, Error **errp)
 417 {
 418     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 419 }
 420 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 421                            Error **errp)
 422 {
 423     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 424 }
 425 #endif /* !CONFIG_VNC */
 426
 427 void qmp_change(const char *device, const char *target,
 428                 bool has_arg, const char *arg, Error **errp)
 429 {
 430     if (strcmp(device, "vnc") == 0) {
 431         qmp_change_vnc(target, has_arg, arg, errp);
 432     } else {
 433         qmp_blockdev_change_medium(true, device, false, NULL, target,
 434                                    has_arg, arg, false, 0, errp);
 435     }
 436 }
 437
 438 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 439 {
 440     ObjectTypeInfoList *e, **pret = data;
 441     ObjectTypeInfo *info;
 442     ObjectClass *parent = object_class_get_parent(klass);
 443
 444     info = g_malloc0(sizeof(*info));
 445     info->name = g_strdup(object_class_get_name(klass));
 446     info->has_abstract = info->abstract = object_class_is_abstract(klass);
 447     if (parent) {
 448         info->has_parent = true;
 449         info->parent = g_strdup(object_class_get_name(parent));
 450     }
 451
 452     e = g_malloc0(sizeof(*e));
 453     e->value = info;
 454     e->next = *pret;
 455     *pret = e;
 456 }
 457
 458 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 459                                        const char *implements,
 460                                        bool has_abstract,
 461                                        bool abstract,
 462                                        Error **errp)
 463 {
 464     ObjectTypeInfoList *ret = NULL;
 465
 466     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 467
 468     return ret;
 469 }
 470
 471 /* Return a DevicePropertyInfo for a qdev property.
 472  *
 473  * If a qdev property with the given name does not exist, use the given default
 474  * type.  If the qdev property info should not be shown, return NULL.
 475  *
 476  * The caller must free the return value.
 477  */
 478 static ObjectPropertyInfo *make_device_property_info(ObjectClass *klass,
 479                                                   const char *name,
 480                                                   const char *default_type,
 481                                                   const char *description)
 482 {
 483     ObjectPropertyInfo *info;
 484     Property *prop;
 485
 486     do {
 487         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 488             if (strcmp(name, prop->name) != 0) {
 489                 continue;
 490             }
 491
 492             /*
 493              * TODO Properties without a parser are just for dirty hacks.
 494              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 495              * for removal.  This conditional should be removed along with
 496              * it.
 497              */
 498             if (!prop->info->set && !prop->info->create) {
 499                 return NULL;           /* no way to set it, don't show */
 500             }
 501
 502             info = g_malloc0(sizeof(*info));
 503             info->name = g_strdup(prop->name);
 504             info->type = default_type ? g_strdup(default_type)
 505                                       : g_strdup(prop->info->name);
 506             info->has_description = !!prop->info->description;
 507             info->description = g_strdup(prop->info->description);
 508             return info;
 509         }
 510         klass = object_class_get_parent(klass);
 511     } while (klass != object_class_by_name(TYPE_DEVICE));
 512
 513     /* Not a qdev property, use the default type */
 514     info = g_malloc0(sizeof(*info));
 515     info->name = g_strdup(name);
 516     info->type = g_strdup(default_type);
 517     info->has_description = !!description;
 518     info->description = g_strdup(description);
 519
 520     return info;
 521 }
 522
 523 ObjectPropertyInfoList *qmp_device_list_properties(const char *typename,
 524                                                 Error **errp)
 525 {
 526     ObjectClass *klass;
 527     Object *obj;
 528     ObjectProperty *prop;
 529     ObjectPropertyIterator iter;
 530     ObjectPropertyInfoList *prop_list = NULL;
 531
 532     klass = object_class_by_name(typename);
 533     if (klass == NULL) {
 534         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 535                   "Device '%s' not found", typename);
 536         return NULL;
 537     }
 538
 539     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 540     if (klass == NULL) {
 541         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename", TYPE_DEVICE);
 542         return NULL;
 543     }
 544
 545     if (object_class_is_abstract(klass)) {
 546         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename",
 547                    "non-abstract device type");
 548         return NULL;
 549     }
 550
 551     obj = object_new(typename);
 552
 553     object_property_iter_init(&iter, obj);
 554     while ((prop = object_property_iter_next(&iter))) {
 555         ObjectPropertyInfo *info;
 556         ObjectPropertyInfoList *entry;
 557
 558         /* Skip Object and DeviceState properties */
 559         if (strcmp(prop->name, "type") == 0 ||
 560             strcmp(prop->name, "realized") == 0 ||
 561             strcmp(prop->name, "hotpluggable") == 0 ||
 562             strcmp(prop->name, "hotplugged") == 0 ||
 563             strcmp(prop->name, "parent_bus") == 0) {
 564             continue;
 565         }
 566
 567         /* Skip legacy properties since they are just string versions of
 568          * properties that we already list.
 569          */
 570         if (strstart(prop->name, "legacy-", NULL)) {
 571             continue;
 572         }
 573
 574         info = make_device_property_info(klass, prop->name, prop->type,
 575                                          prop->description);
 576         if (!info) {
 577             continue;
 578         }
 579
 580         entry = g_malloc0(sizeof(*entry));
 581         entry->value = info;
 582         entry->next = prop_list;
 583         prop_list = entry;
 584     }
 585
 586     object_unref(obj);
 587
 588     return prop_list;
 589 }
 590
 591 ObjectPropertyInfoList *qmp_qom_list_properties(const char *typename,
 592                                              Error **errp)
 593 {
 594     ObjectClass *klass;
 595     Object *obj = NULL;
 596     ObjectProperty *prop;
 597     ObjectPropertyIterator iter;
 598     ObjectPropertyInfoList *prop_list = NULL;
 599
 600     klass = object_class_by_name(typename);
 601     if (klass == NULL) {
 602         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 603                   "Class '%s' not found", typename);
 604         return NULL;
 605     }
 606
 607     klass = object_class_dynamic_cast(klass, TYPE_OBJECT);
 608     if (klass == NULL) {
 609         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename", TYPE_OBJECT);
 610         return NULL;
 611     }
 612
 613     if (object_class_is_abstract(klass)) {
 614         object_class_property_iter_init(&iter, klass);
 615     } else {
 616         obj = object_new(typename);
 617         object_property_iter_init(&iter, obj);
 618     }
 619     while ((prop = object_property_iter_next(&iter))) {
 620         ObjectPropertyInfo *info;
 621         ObjectPropertyInfoList *entry;
 622
 623         info = g_malloc0(sizeof(*info));
 624         info->name = g_strdup(prop->name);
 625         info->type = g_strdup(prop->type);
 626         info->has_description = !!prop->description;
 627         info->description = g_strdup(prop->description);
 628
 629         entry = g_malloc0(sizeof(*entry));
 630         entry->value = info;
 631         entry->next = prop_list;
 632         prop_list = entry;
 633     }
 634
 635     object_unref(obj);
 636
 637     return prop_list;
 638 }
 639
 640 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 641 {
 642     return arch_query_cpu_definitions(errp);
 643 }
 644
 645 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 646                                                      CpuModelInfo *model,
 647                                                      Error **errp)
 648 {
 649     return arch_query_cpu_model_expansion(type, model, errp);
 650 }
 651
 652 CpuModelCompareInfo *qmp_query_cpu_model_comparison(CpuModelInfo *modela,
 653                                                     CpuModelInfo *modelb,
 654                                                     Error **errp)
 655 {
 656     return arch_query_cpu_model_comparison(modela, modelb, errp);
 657 }
 658
 659 CpuModelBaselineInfo *qmp_query_cpu_model_baseline(CpuModelInfo *modela,
 660                                                    CpuModelInfo *modelb,
 661                                                    Error **errp)
 662 {
 663     return arch_query_cpu_model_baseline(modela, modelb, errp);
 664 }
 665
 666 void qmp_add_client(const char *protocol, const char *fdname,
 667                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 668                     Error **errp)
 669 {
 670     Chardev *s;
 671     int fd;
 672
 673     fd = monitor_get_fd(cur_mon, fdname, errp);
 674     if (fd < 0) {
 675         return;
 676     }
 677
 678     if (strcmp(protocol, "spice") == 0) {
 679         if (!qemu_using_spice(errp)) {
 680             close(fd);
 681             return;
 682         }
 683         skipauth = has_skipauth ? skipauth : false;
 684         tls = has_tls ? tls : false;
 685         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 686             error_setg(errp, "spice failed to add client");
 687             close(fd);
 688         }
 689         return;
 690 #ifdef CONFIG_VNC
 691     } else if (strcmp(protocol, "vnc") == 0) {
 692         skipauth = has_skipauth ? skipauth : false;
 693         vnc_display_add_client(NULL, fd, skipauth);
 694         return;
 695 #endif
 696     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 697         if (qemu_chr_add_client(s, fd) < 0) {
 698             error_setg(errp, "failed to add client");
 699             close(fd);
 700             return;
 701         }
 702         return;
 703     }
 704
 705     error_setg(errp, "protocol '%s' is invalid", protocol);
 706     close(fd);
 707 }
 708
 709
 710 void qmp_object_add(const char *type, const char *id,
 711                     bool has_props, QObject *props, Error **errp)
 712 {
 713     QDict *pdict;
 714     Visitor *v;
 715     Object *obj;
 716
 717     if (props) {
 718         pdict = qobject_to(QDict, props);
 719         if (!pdict) {
 720             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 721             return;
 722         }
 723         qobject_ref(pdict);
 724     } else {
 725         pdict = qdict_new();
 726     }
 727
 728     v = qobject_input_visitor_new(QOBJECT(pdict));
 729     obj = user_creatable_add_type(type, id, pdict, v, errp);
 730     visit_free(v);
 731     if (obj) {
 732         object_unref(obj);
 733     }
 734     qobject_unref(pdict);
 735 }
 736
 737 void qmp_object_del(const char *id, Error **errp)
 738 {
 739     user_creatable_del(id, errp);
 740 }
 741
 742 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 743 {
 744     return qmp_memory_device_list();
 745 }
 746
 747 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 748 {
 749     bool ambig;
 750     ACPIOSTInfoList *head = NULL;
 751     ACPIOSTInfoList **prev = &head;
 752     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 753
 754     if (obj) {
 755         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 756         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 757
 758         adevc->ospm_status(adev, &prev);
 759     } else {
 760         error_setg(errp, "command is not supported, missing ACPI device");
 761     }
 762
 763     return head;
 764 }
 765
 766 MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 767 {
 768     MemoryInfo *mem_info = g_malloc0(sizeof(MemoryInfo));
 769
 770     mem_info->base_memory = ram_size;
 771
 772     mem_info->plugged_memory = get_plugged_memory_size();
 773     mem_info->has_plugged_memory =
 774         mem_info->plugged_memory != (uint64_t)-1;
 775
 776     return mem_info;
 777 }
 778
 779 static QemuSemaphore x_oob_test_sem;
 780
 781 static void __attribute__((constructor)) x_oob_test_init(void)
 782 {
 783     qemu_sem_init(&x_oob_test_sem, 0);
 784 }
 785
 786 void qmp_x_oob_test(bool lock, Error **errp)
 787 {
 788     if (lock) {
 789         qemu_sem_wait(&x_oob_test_sem);
 790     } else {
 791         qemu_sem_post(&x_oob_test_sem);
 792     }
 793 }