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 "monitor/monitor.h"
  20 #include "sysemu/sysemu.h"
  21 #include "qemu/uuid.h"
  22 #include "qmp-commands.h"
  23 #include "sysemu/char.h"
  24 #include "ui/qemu-spice.h"
  25 #include "ui/vnc.h"
  26 #include "sysemu/kvm.h"
  27 #include "sysemu/arch_init.h"
  28 #include "hw/qdev.h"
  29 #include "sysemu/blockdev.h"
  30 #include "sysemu/block-backend.h"
  31 #include "qom/qom-qobject.h"
  32 #include "qapi/qmp/qerror.h"
  33 #include "qapi/qmp/qobject.h"
  34 #include "qapi/qobject-input-visitor.h"
  35 #include "hw/boards.h"
  36 #include "qom/object_interfaces.h"
  37 #include "hw/mem/pc-dimm.h"
  38 #include "hw/acpi/acpi_dev_interface.h"
  39
  40 NameInfo *qmp_query_name(Error **errp)
  41 {
  42     NameInfo *info = g_malloc0(sizeof(*info));
  43
  44     if (qemu_name) {
  45         info->has_name = true;
  46         info->name = g_strdup(qemu_name);
  47     }
  48
  49     return info;
  50 }
  51
  52 VersionInfo *qmp_query_version(Error **errp)
  53 {
  54     VersionInfo *info = g_new0(VersionInfo, 1);
  55
  56     info->qemu = g_new0(VersionTriple, 1);
  57     info->qemu->major = QEMU_VERSION_MAJOR;
  58     info->qemu->minor = QEMU_VERSION_MINOR;
  59     info->qemu->micro = QEMU_VERSION_MICRO;
  60     info->package = g_strdup(QEMU_PKGVERSION);
  61
  62     return info;
  63 }
  64
  65 KvmInfo *qmp_query_kvm(Error **errp)
  66 {
  67     KvmInfo *info = g_malloc0(sizeof(*info));
  68
  69     info->enabled = kvm_enabled();
  70     info->present = kvm_available();
  71
  72     return info;
  73 }
  74
  75 UuidInfo *qmp_query_uuid(Error **errp)
  76 {
  77     UuidInfo *info = g_malloc0(sizeof(*info));
  78
  79     info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
  80     return info;
  81 }
  82
  83 void qmp_quit(Error **errp)
  84 {
  85     no_shutdown = 0;
  86     qemu_system_shutdown_request();
  87 }
  88
  89 void qmp_stop(Error **errp)
  90 {
  91     /* if there is a dump in background, we should wait until the dump
  92      * finished */
  93     if (dump_in_progress()) {
  94         error_setg(errp, "There is a dump in process, please wait.");
  95         return;
  96     }
  97
  98     if (runstate_check(RUN_STATE_INMIGRATE)) {
  99         autostart = 0;
 100     } else {
 101         vm_stop(RUN_STATE_PAUSED);
 102     }
 103 }
 104
 105 void qmp_system_reset(Error **errp)
 106 {
 107     qemu_system_reset_request();
 108 }
 109
 110 void qmp_system_powerdown(Error **erp)
 111 {
 112     qemu_system_powerdown_request();
 113 }
 114
 115 void qmp_cpu(int64_t index, Error **errp)
 116 {
 117     /* Just do nothing */
 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-commands.hx ensures that QMP command query-spice exists only
 151  * #ifdef CONFIG_SPICE.  Necessary for an accurate query-commands
 152  * result.  However, the QAPI schema is blissfully unaware of that,
 153  * and the QAPI code generator happily generates a dead
 154  * qmp_marshal_query_spice() that calls qmp_query_spice().  Provide it
 155  * one, or else linking fails.  FIXME Educate the QAPI schema on
 156  * CONFIG_SPICE.
 157  */
 158 SpiceInfo *qmp_query_spice(Error **errp)
 159 {
 160     abort();
 161 };
 162 #endif
 163
 164 void qmp_cont(Error **errp)
 165 {
 166     Error *local_err = NULL;
 167     BlockBackend *blk;
 168     BlockDriverState *bs;
 169     BdrvNextIterator it;
 170
 171     /* if there is a dump in background, we should wait until the dump
 172      * finished */
 173     if (dump_in_progress()) {
 174         error_setg(errp, "There is a dump in process, please wait.");
 175         return;
 176     }
 177
 178     if (runstate_needs_reset()) {
 179         error_setg(errp, "Resetting the Virtual Machine is required");
 180         return;
 181     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 182         return;
 183     }
 184
 185     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 186         blk_iostatus_reset(blk);
 187     }
 188
 189     for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
 190         bdrv_add_key(bs, NULL, &local_err);
 191         if (local_err) {
 192             error_propagate(errp, local_err);
 193             return;
 194         }
 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     if (runstate_check(RUN_STATE_FINISH_MIGRATE) ||
 200         runstate_check(RUN_STATE_POSTMIGRATE))
 201     {
 202         bdrv_invalidate_cache_all(&local_err);
 203         if (local_err) {
 204             error_propagate(errp, local_err);
 205             return;
 206         }
 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
 443     info = g_malloc0(sizeof(*info));
 444     info->name = g_strdup(object_class_get_name(klass));
 445
 446     e = g_malloc0(sizeof(*e));
 447     e->value = info;
 448     e->next = *pret;
 449     *pret = e;
 450 }
 451
 452 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 453                                        const char *implements,
 454                                        bool has_abstract,
 455                                        bool abstract,
 456                                        Error **errp)
 457 {
 458     ObjectTypeInfoList *ret = NULL;
 459
 460     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 461
 462     return ret;
 463 }
 464
 465 /* Return a DevicePropertyInfo for a qdev property.
 466  *
 467  * If a qdev property with the given name does not exist, use the given default
 468  * type.  If the qdev property info should not be shown, return NULL.
 469  *
 470  * The caller must free the return value.
 471  */
 472 static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
 473                                                      const char *name,
 474                                                      const char *default_type,
 475                                                      const char *description)
 476 {
 477     DevicePropertyInfo *info;
 478     Property *prop;
 479
 480     do {
 481         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 482             if (strcmp(name, prop->name) != 0) {
 483                 continue;
 484             }
 485
 486             /*
 487              * TODO Properties without a parser are just for dirty hacks.
 488              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 489              * for removal.  This conditional should be removed along with
 490              * it.
 491              */
 492             if (!prop->info->set) {
 493                 return NULL;           /* no way to set it, don't show */
 494             }
 495
 496             info = g_malloc0(sizeof(*info));
 497             info->name = g_strdup(prop->name);
 498             info->type = g_strdup(prop->info->name);
 499             info->has_description = !!prop->info->description;
 500             info->description = g_strdup(prop->info->description);
 501             return info;
 502         }
 503         klass = object_class_get_parent(klass);
 504     } while (klass != object_class_by_name(TYPE_DEVICE));
 505
 506     /* Not a qdev property, use the default type */
 507     info = g_malloc0(sizeof(*info));
 508     info->name = g_strdup(name);
 509     info->type = g_strdup(default_type);
 510     info->has_description = !!description;
 511     info->description = g_strdup(description);
 512
 513     return info;
 514 }
 515
 516 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 517                                                    Error **errp)
 518 {
 519     ObjectClass *klass;
 520     Object *obj;
 521     ObjectProperty *prop;
 522     ObjectPropertyIterator iter;
 523     DevicePropertyInfoList *prop_list = NULL;
 524
 525     klass = object_class_by_name(typename);
 526     if (klass == NULL) {
 527         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 528                   "Device '%s' not found", typename);
 529         return NULL;
 530     }
 531
 532     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 533     if (klass == NULL) {
 534         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename", TYPE_DEVICE);
 535         return NULL;
 536     }
 537
 538     if (object_class_is_abstract(klass)) {
 539         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "typename",
 540                    "non-abstract device type");
 541         return NULL;
 542     }
 543
 544     if (DEVICE_CLASS(klass)->cannot_destroy_with_object_finalize_yet) {
 545         error_setg(errp, "Can't list properties of device '%s'", typename);
 546         return NULL;
 547     }
 548
 549     obj = object_new(typename);
 550
 551     object_property_iter_init(&iter, obj);
 552     while ((prop = object_property_iter_next(&iter))) {
 553         DevicePropertyInfo *info;
 554         DevicePropertyInfoList *entry;
 555
 556         /* Skip Object and DeviceState properties */
 557         if (strcmp(prop->name, "type") == 0 ||
 558             strcmp(prop->name, "realized") == 0 ||
 559             strcmp(prop->name, "hotpluggable") == 0 ||
 560             strcmp(prop->name, "hotplugged") == 0 ||
 561             strcmp(prop->name, "parent_bus") == 0) {
 562             continue;
 563         }
 564
 565         /* Skip legacy properties since they are just string versions of
 566          * properties that we already list.
 567          */
 568         if (strstart(prop->name, "legacy-", NULL)) {
 569             continue;
 570         }
 571
 572         info = make_device_property_info(klass, prop->name, prop->type,
 573                                          prop->description);
 574         if (!info) {
 575             continue;
 576         }
 577
 578         entry = g_malloc0(sizeof(*entry));
 579         entry->value = info;
 580         entry->next = prop_list;
 581         prop_list = entry;
 582     }
 583
 584     object_unref(obj);
 585
 586     return prop_list;
 587 }
 588
 589 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 590 {
 591     return arch_query_cpu_definitions(errp);
 592 }
 593
 594 CpuModelExpansionInfo *qmp_query_cpu_model_expansion(CpuModelExpansionType type,
 595                                                      CpuModelInfo *model,
 596                                                      Error **errp)
 597 {
 598     return arch_query_cpu_model_expansion(type, model, errp);
 599 }
 600
 601 CpuModelCompareInfo *qmp_query_cpu_model_comparison(CpuModelInfo *modela,
 602                                                     CpuModelInfo *modelb,
 603                                                     Error **errp)
 604 {
 605     return arch_query_cpu_model_comparison(modela, modelb, errp);
 606 }
 607
 608 CpuModelBaselineInfo *qmp_query_cpu_model_baseline(CpuModelInfo *modela,
 609                                                    CpuModelInfo *modelb,
 610                                                    Error **errp)
 611 {
 612     return arch_query_cpu_model_baseline(modela, modelb, errp);
 613 }
 614
 615 void qmp_add_client(const char *protocol, const char *fdname,
 616                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 617                     Error **errp)
 618 {
 619     Chardev *s;
 620     int fd;
 621
 622     fd = monitor_get_fd(cur_mon, fdname, errp);
 623     if (fd < 0) {
 624         return;
 625     }
 626
 627     if (strcmp(protocol, "spice") == 0) {
 628         if (!qemu_using_spice(errp)) {
 629             close(fd);
 630             return;
 631         }
 632         skipauth = has_skipauth ? skipauth : false;
 633         tls = has_tls ? tls : false;
 634         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 635             error_setg(errp, "spice failed to add client");
 636             close(fd);
 637         }
 638         return;
 639 #ifdef CONFIG_VNC
 640     } else if (strcmp(protocol, "vnc") == 0) {
 641         skipauth = has_skipauth ? skipauth : false;
 642         vnc_display_add_client(NULL, fd, skipauth);
 643         return;
 644 #endif
 645     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 646         if (qemu_chr_add_client(s, fd) < 0) {
 647             error_setg(errp, "failed to add client");
 648             close(fd);
 649             return;
 650         }
 651         return;
 652     }
 653
 654     error_setg(errp, "protocol '%s' is invalid", protocol);
 655     close(fd);
 656 }
 657
 658
 659 void qmp_object_add(const char *type, const char *id,
 660                     bool has_props, QObject *props, Error **errp)
 661 {
 662     QDict *pdict;
 663     Visitor *v;
 664     Object *obj;
 665
 666     if (props) {
 667         pdict = qobject_to_qdict(props);
 668         if (!pdict) {
 669             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 670             return;
 671         }
 672         QINCREF(pdict);
 673     } else {
 674         pdict = qdict_new();
 675     }
 676
 677     v = qobject_input_visitor_new(QOBJECT(pdict), true);
 678     obj = user_creatable_add_type(type, id, pdict, v, errp);
 679     visit_free(v);
 680     if (obj) {
 681         object_unref(obj);
 682     }
 683     QDECREF(pdict);
 684 }
 685
 686 void qmp_object_del(const char *id, Error **errp)
 687 {
 688     user_creatable_del(id, errp);
 689 }
 690
 691 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 692 {
 693     MemoryDeviceInfoList *head = NULL;
 694     MemoryDeviceInfoList **prev = &head;
 695
 696     qmp_pc_dimm_device_list(qdev_get_machine(), &prev);
 697
 698     return head;
 699 }
 700
 701 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 702 {
 703     bool ambig;
 704     ACPIOSTInfoList *head = NULL;
 705     ACPIOSTInfoList **prev = &head;
 706     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 707
 708     if (obj) {
 709         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 710         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 711
 712         adevc->ospm_status(adev, &prev);
 713     } else {
 714         error_setg(errp, "command is not supported, missing ACPI device");
 715     }
 716
 717     return head;
 718 }