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