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/cutils.h"
  18 #include "monitor/monitor.h"
  19 #include "sysemu/sysemu.h"
  20 #include "qmp-commands.h"
  21 #include "sysemu/char.h"
  22 #include "ui/qemu-spice.h"
  23 #include "ui/vnc.h"
  24 #include "sysemu/kvm.h"
  25 #include "sysemu/arch_init.h"
  26 #include "hw/qdev.h"
  27 #include "sysemu/blockdev.h"
  28 #include "sysemu/block-backend.h"
  29 #include "qom/qom-qobject.h"
  30 #include "qapi/qmp/qerror.h"
  31 #include "qapi/qmp/qobject.h"
  32 #include "qapi/qmp-input-visitor.h"
  33 #include "hw/boards.h"
  34 #include "qom/object_interfaces.h"
  35 #include "hw/mem/pc-dimm.h"
  36 #include "hw/acpi/acpi_dev_interface.h"
  37
  38 NameInfo *qmp_query_name(Error **errp)
  39 {
  40     NameInfo *info = g_malloc0(sizeof(*info));
  41
  42     if (qemu_name) {
  43         info->has_name = true;
  44         info->name = g_strdup(qemu_name);
  45     }
  46
  47     return info;
  48 }
  49
  50 VersionInfo *qmp_query_version(Error **errp)
  51 {
  52     VersionInfo *info = g_new0(VersionInfo, 1);
  53     const char *version = QEMU_VERSION;
  54     const char *tmp;
  55     int err;
  56
  57     info->qemu = g_new0(VersionTriple, 1);
  58     err = qemu_strtoll(version, &tmp, 10, &info->qemu->major);
  59     assert(err == 0);
  60     tmp++;
  61
  62     err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->minor);
  63     assert(err == 0);
  64     tmp++;
  65
  66     err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->micro);
  67     assert(err == 0);
  68     info->package = g_strdup(QEMU_PKGVERSION);
  69
  70     return info;
  71 }
  72
  73 KvmInfo *qmp_query_kvm(Error **errp)
  74 {
  75     KvmInfo *info = g_malloc0(sizeof(*info));
  76
  77     info->enabled = kvm_enabled();
  78     info->present = kvm_available();
  79
  80     return info;
  81 }
  82
  83 UuidInfo *qmp_query_uuid(Error **errp)
  84 {
  85     UuidInfo *info = g_malloc0(sizeof(*info));
  86     char uuid[64];
  87
  88     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  89                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  90                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  91                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  92                    qemu_uuid[14], qemu_uuid[15]);
  93
  94     info->UUID = g_strdup(uuid);
  95     return info;
  96 }
  97
  98 void qmp_quit(Error **errp)
  99 {
 100     no_shutdown = 0;
 101     qemu_system_shutdown_request();
 102 }
 103
 104 void qmp_stop(Error **errp)
 105 {
 106     /* if there is a dump in background, we should wait until the dump
 107      * finished */
 108     if (dump_in_progress()) {
 109         error_setg(errp, "There is a dump in process, please wait.");
 110         return;
 111     }
 112
 113     if (runstate_check(RUN_STATE_INMIGRATE)) {
 114         autostart = 0;
 115     } else {
 116         vm_stop(RUN_STATE_PAUSED);
 117     }
 118 }
 119
 120 void qmp_system_reset(Error **errp)
 121 {
 122     qemu_system_reset_request();
 123 }
 124
 125 void qmp_system_powerdown(Error **erp)
 126 {
 127     qemu_system_powerdown_request();
 128 }
 129
 130 void qmp_cpu(int64_t index, Error **errp)
 131 {
 132     /* Just do nothing */
 133 }
 134
 135 void qmp_cpu_add(int64_t id, Error **errp)
 136 {
 137     MachineClass *mc;
 138
 139     mc = MACHINE_GET_CLASS(current_machine);
 140     if (mc->hot_add_cpu) {
 141         mc->hot_add_cpu(id, errp);
 142     } else {
 143         error_setg(errp, "Not supported");
 144     }
 145 }
 146
 147 #ifndef CONFIG_VNC
 148 /* If VNC support is enabled, the "true" query-vnc command is
 149    defined in the VNC subsystem */
 150 VncInfo *qmp_query_vnc(Error **errp)
 151 {
 152     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 153     return NULL;
 154 };
 155
 156 VncInfo2List *qmp_query_vnc_servers(Error **errp)
 157 {
 158     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 159     return NULL;
 160 };
 161 #endif
 162
 163 #ifndef CONFIG_SPICE
 164 /*
 165  * qmp-commands.hx ensures that QMP command query-spice exists only
 166  * #ifdef CONFIG_SPICE.  Necessary for an accurate query-commands
 167  * result.  However, the QAPI schema is blissfully unaware of that,
 168  * and the QAPI code generator happily generates a dead
 169  * qmp_marshal_query_spice() that calls qmp_query_spice().  Provide it
 170  * one, or else linking fails.  FIXME Educate the QAPI schema on
 171  * CONFIG_SPICE.
 172  */
 173 SpiceInfo *qmp_query_spice(Error **errp)
 174 {
 175     abort();
 176 };
 177 #endif
 178
 179 void qmp_cont(Error **errp)
 180 {
 181     Error *local_err = NULL;
 182     BlockBackend *blk;
 183     BlockDriverState *bs;
 184
 185     /* if there is a dump in background, we should wait until the dump
 186      * finished */
 187     if (dump_in_progress()) {
 188         error_setg(errp, "There is a dump in process, please wait.");
 189         return;
 190     }
 191
 192     if (runstate_needs_reset()) {
 193         error_setg(errp, "Resetting the Virtual Machine is required");
 194         return;
 195     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 196         return;
 197     }
 198
 199     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 200         blk_iostatus_reset(blk);
 201     }
 202     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 203         bdrv_add_key(bs, NULL, &local_err);
 204         if (local_err) {
 205             error_propagate(errp, local_err);
 206             return;
 207         }
 208     }
 209
 210     /* Continuing after completed migration. Images have been inactivated to
 211      * allow the destination to take control. Need to get control back now. */
 212     if (runstate_check(RUN_STATE_FINISH_MIGRATE) ||
 213         runstate_check(RUN_STATE_POSTMIGRATE))
 214     {
 215         bdrv_invalidate_cache_all(&local_err);
 216         if (local_err) {
 217             error_propagate(errp, local_err);
 218             return;
 219         }
 220     }
 221
 222     if (runstate_check(RUN_STATE_INMIGRATE)) {
 223         autostart = 1;
 224     } else {
 225         vm_start();
 226     }
 227 }
 228
 229 void qmp_system_wakeup(Error **errp)
 230 {
 231     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 232 }
 233
 234 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 235 {
 236     Object *obj;
 237     bool ambiguous = false;
 238     ObjectPropertyInfoList *props = NULL;
 239     ObjectProperty *prop;
 240     ObjectPropertyIterator iter;
 241
 242     obj = object_resolve_path(path, &ambiguous);
 243     if (obj == NULL) {
 244         if (ambiguous) {
 245             error_setg(errp, "Path '%s' is ambiguous", path);
 246         } else {
 247             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 248                       "Device '%s' not found", path);
 249         }
 250         return NULL;
 251     }
 252
 253     object_property_iter_init(&iter, obj);
 254     while ((prop = object_property_iter_next(&iter))) {
 255         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 256
 257         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 258         entry->next = props;
 259         props = entry;
 260
 261         entry->value->name = g_strdup(prop->name);
 262         entry->value->type = g_strdup(prop->type);
 263     }
 264
 265     return props;
 266 }
 267
 268 void qmp_qom_set(const char *path, const char *property, QObject *value,
 269                  Error **errp)
 270 {
 271     Object *obj;
 272
 273     obj = object_resolve_path(path, NULL);
 274     if (!obj) {
 275         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 276                   "Device '%s' not found", path);
 277         return;
 278     }
 279
 280     object_property_set_qobject(obj, value, property, errp);
 281 }
 282
 283 QObject *qmp_qom_get(const char *path, const char *property, Error **errp)
 284 {
 285     Object *obj;
 286
 287     obj = object_resolve_path(path, NULL);
 288     if (!obj) {
 289         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 290                   "Device '%s' not found", path);
 291         return NULL;
 292     }
 293
 294     return object_property_get_qobject(obj, property, errp);
 295 }
 296
 297 void qmp_set_password(const char *protocol, const char *password,
 298                       bool has_connected, const char *connected, Error **errp)
 299 {
 300     int disconnect_if_connected = 0;
 301     int fail_if_connected = 0;
 302     int rc;
 303
 304     if (has_connected) {
 305         if (strcmp(connected, "fail") == 0) {
 306             fail_if_connected = 1;
 307         } else if (strcmp(connected, "disconnect") == 0) {
 308             disconnect_if_connected = 1;
 309         } else if (strcmp(connected, "keep") == 0) {
 310             /* nothing */
 311         } else {
 312             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 313             return;
 314         }
 315     }
 316
 317     if (strcmp(protocol, "spice") == 0) {
 318         if (!qemu_using_spice(errp)) {
 319             return;
 320         }
 321         rc = qemu_spice_set_passwd(password, fail_if_connected,
 322                                    disconnect_if_connected);
 323         if (rc != 0) {
 324             error_setg(errp, QERR_SET_PASSWD_FAILED);
 325         }
 326         return;
 327     }
 328
 329     if (strcmp(protocol, "vnc") == 0) {
 330         if (fail_if_connected || disconnect_if_connected) {
 331             /* vnc supports "connected=keep" only */
 332             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 333             return;
 334         }
 335         /* Note that setting an empty password will not disable login through
 336          * this interface. */
 337         rc = vnc_display_password(NULL, password);
 338         if (rc < 0) {
 339             error_setg(errp, QERR_SET_PASSWD_FAILED);
 340         }
 341         return;
 342     }
 343
 344     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 345 }
 346
 347 void qmp_expire_password(const char *protocol, const char *whenstr,
 348                          Error **errp)
 349 {
 350     time_t when;
 351     int rc;
 352
 353     if (strcmp(whenstr, "now") == 0) {
 354         when = 0;
 355     } else if (strcmp(whenstr, "never") == 0) {
 356         when = TIME_MAX;
 357     } else if (whenstr[0] == '+') {
 358         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 359     } else {
 360         when = strtoull(whenstr, NULL, 10);
 361     }
 362
 363     if (strcmp(protocol, "spice") == 0) {
 364         if (!qemu_using_spice(errp)) {
 365             return;
 366         }
 367         rc = qemu_spice_set_pw_expire(when);
 368         if (rc != 0) {
 369             error_setg(errp, QERR_SET_PASSWD_FAILED);
 370         }
 371         return;
 372     }
 373
 374     if (strcmp(protocol, "vnc") == 0) {
 375         rc = vnc_display_pw_expire(NULL, when);
 376         if (rc != 0) {
 377             error_setg(errp, QERR_SET_PASSWD_FAILED);
 378         }
 379         return;
 380     }
 381
 382     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 383 }
 384
 385 #ifdef CONFIG_VNC
 386 void qmp_change_vnc_password(const char *password, Error **errp)
 387 {
 388     if (vnc_display_password(NULL, password) < 0) {
 389         error_setg(errp, QERR_SET_PASSWD_FAILED);
 390     }
 391 }
 392
 393 static void qmp_change_vnc_listen(const char *target, Error **errp)
 394 {
 395     QemuOptsList *olist = qemu_find_opts("vnc");
 396     QemuOpts *opts;
 397
 398     if (strstr(target, "id=")) {
 399         error_setg(errp, "id not supported");
 400         return;
 401     }
 402
 403     opts = qemu_opts_find(olist, "default");
 404     if (opts) {
 405         qemu_opts_del(opts);
 406     }
 407     opts = vnc_parse(target, errp);
 408     if (!opts) {
 409         return;
 410     }
 411
 412     vnc_display_open("default", errp);
 413 }
 414
 415 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 416                            Error **errp)
 417 {
 418     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 419         if (!has_arg) {
 420             error_setg(errp, QERR_MISSING_PARAMETER, "password");
 421         } else {
 422             qmp_change_vnc_password(arg, errp);
 423         }
 424     } else {
 425         qmp_change_vnc_listen(target, errp);
 426     }
 427 }
 428 #else
 429 void qmp_change_vnc_password(const char *password, Error **errp)
 430 {
 431     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 432 }
 433 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 434                            Error **errp)
 435 {
 436     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 437 }
 438 #endif /* !CONFIG_VNC */
 439
 440 void qmp_change(const char *device, const char *target,
 441                 bool has_arg, const char *arg, Error **errp)
 442 {
 443     if (strcmp(device, "vnc") == 0) {
 444         qmp_change_vnc(target, has_arg, arg, errp);
 445     } else {
 446         qmp_blockdev_change_medium(device, target, has_arg, arg, false, 0,
 447                                    errp);
 448     }
 449 }
 450
 451 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 452 {
 453     ObjectTypeInfoList *e, **pret = data;
 454     ObjectTypeInfo *info;
 455
 456     info = g_malloc0(sizeof(*info));
 457     info->name = g_strdup(object_class_get_name(klass));
 458
 459     e = g_malloc0(sizeof(*e));
 460     e->value = info;
 461     e->next = *pret;
 462     *pret = e;
 463 }
 464
 465 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 466                                        const char *implements,
 467                                        bool has_abstract,
 468                                        bool abstract,
 469                                        Error **errp)
 470 {
 471     ObjectTypeInfoList *ret = NULL;
 472
 473     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 474
 475     return ret;
 476 }
 477
 478 /* Return a DevicePropertyInfo for a qdev property.
 479  *
 480  * If a qdev property with the given name does not exist, use the given default
 481  * type.  If the qdev property info should not be shown, return NULL.
 482  *
 483  * The caller must free the return value.
 484  */
 485 static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
 486                                                      const char *name,
 487                                                      const char *default_type,
 488                                                      const char *description)
 489 {
 490     DevicePropertyInfo *info;
 491     Property *prop;
 492
 493     do {
 494         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 495             if (strcmp(name, prop->name) != 0) {
 496                 continue;
 497             }
 498
 499             /*
 500              * TODO Properties without a parser are just for dirty hacks.
 501              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 502              * for removal.  This conditional should be removed along with
 503              * it.
 504              */
 505             if (!prop->info->set) {
 506                 return NULL;           /* no way to set it, don't show */
 507             }
 508
 509             info = g_malloc0(sizeof(*info));
 510             info->name = g_strdup(prop->name);
 511             info->type = g_strdup(prop->info->name);
 512             info->has_description = !!prop->info->description;
 513             info->description = g_strdup(prop->info->description);
 514             return info;
 515         }
 516         klass = object_class_get_parent(klass);
 517     } while (klass != object_class_by_name(TYPE_DEVICE));
 518
 519     /* Not a qdev property, use the default type */
 520     info = g_malloc0(sizeof(*info));
 521     info->name = g_strdup(name);
 522     info->type = g_strdup(default_type);
 523     info->has_description = !!description;
 524     info->description = g_strdup(description);
 525
 526     return info;
 527 }
 528
 529 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 530                                                    Error **errp)
 531 {
 532     ObjectClass *klass;
 533     Object *obj;
 534     ObjectProperty *prop;
 535     ObjectPropertyIterator iter;
 536     DevicePropertyInfoList *prop_list = NULL;
 537
 538     klass = object_class_by_name(typename);
 539     if (klass == NULL) {
 540         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 541                   "Device '%s' not found", typename);
 542         return NULL;
 543     }
 544
 545     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 546     if (klass == NULL) {
 547         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name", TYPE_DEVICE);
 548         return NULL;
 549     }
 550
 551     if (object_class_is_abstract(klass)) {
 552         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name",
 553                    "non-abstract device type");
 554         return NULL;
 555     }
 556
 557     if (DEVICE_CLASS(klass)->cannot_destroy_with_object_finalize_yet) {
 558         error_setg(errp, "Can't list properties of device '%s'", typename);
 559         return NULL;
 560     }
 561
 562     obj = object_new(typename);
 563
 564     object_property_iter_init(&iter, obj);
 565     while ((prop = object_property_iter_next(&iter))) {
 566         DevicePropertyInfo *info;
 567         DevicePropertyInfoList *entry;
 568
 569         /* Skip Object and DeviceState properties */
 570         if (strcmp(prop->name, "type") == 0 ||
 571             strcmp(prop->name, "realized") == 0 ||
 572             strcmp(prop->name, "hotpluggable") == 0 ||
 573             strcmp(prop->name, "hotplugged") == 0 ||
 574             strcmp(prop->name, "parent_bus") == 0) {
 575             continue;
 576         }
 577
 578         /* Skip legacy properties since they are just string versions of
 579          * properties that we already list.
 580          */
 581         if (strstart(prop->name, "legacy-", NULL)) {
 582             continue;
 583         }
 584
 585         info = make_device_property_info(klass, prop->name, prop->type,
 586                                          prop->description);
 587         if (!info) {
 588             continue;
 589         }
 590
 591         entry = g_malloc0(sizeof(*entry));
 592         entry->value = info;
 593         entry->next = prop_list;
 594         prop_list = entry;
 595     }
 596
 597     object_unref(obj);
 598
 599     return prop_list;
 600 }
 601
 602 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 603 {
 604     return arch_query_cpu_definitions(errp);
 605 }
 606
 607 void qmp_add_client(const char *protocol, const char *fdname,
 608                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 609                     Error **errp)
 610 {
 611     CharDriverState *s;
 612     int fd;
 613
 614     fd = monitor_get_fd(cur_mon, fdname, errp);
 615     if (fd < 0) {
 616         return;
 617     }
 618
 619     if (strcmp(protocol, "spice") == 0) {
 620         if (!qemu_using_spice(errp)) {
 621             close(fd);
 622             return;
 623         }
 624         skipauth = has_skipauth ? skipauth : false;
 625         tls = has_tls ? tls : false;
 626         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 627             error_setg(errp, "spice failed to add client");
 628             close(fd);
 629         }
 630         return;
 631 #ifdef CONFIG_VNC
 632     } else if (strcmp(protocol, "vnc") == 0) {
 633         skipauth = has_skipauth ? skipauth : false;
 634         vnc_display_add_client(NULL, fd, skipauth);
 635         return;
 636 #endif
 637     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 638         if (qemu_chr_add_client(s, fd) < 0) {
 639             error_setg(errp, "failed to add client");
 640             close(fd);
 641             return;
 642         }
 643         return;
 644     }
 645
 646     error_setg(errp, "protocol '%s' is invalid", protocol);
 647     close(fd);
 648 }
 649
 650
 651 void qmp_object_add(const char *type, const char *id,
 652                     bool has_props, QObject *props, Error **errp)
 653 {
 654     const QDict *pdict = NULL;
 655     QmpInputVisitor *qiv;
 656     Object *obj;
 657
 658     if (props) {
 659         pdict = qobject_to_qdict(props);
 660         if (!pdict) {
 661             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 662             return;
 663         }
 664     }
 665
 666     qiv = qmp_input_visitor_new(props);
 667     obj = user_creatable_add_type(type, id, pdict,
 668                                   qmp_input_get_visitor(qiv), errp);
 669     qmp_input_visitor_cleanup(qiv);
 670     if (obj) {
 671         object_unref(obj);
 672     }
 673 }
 674
 675 void qmp_object_del(const char *id, Error **errp)
 676 {
 677     user_creatable_del(id, errp);
 678 }
 679
 680 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 681 {
 682     MemoryDeviceInfoList *head = NULL;
 683     MemoryDeviceInfoList **prev = &head;
 684
 685     qmp_pc_dimm_device_list(qdev_get_machine(), &prev);
 686
 687     return head;
 688 }
 689
 690 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 691 {
 692     bool ambig;
 693     ACPIOSTInfoList *head = NULL;
 694     ACPIOSTInfoList **prev = &head;
 695     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 696
 697     if (obj) {
 698         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 699         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 700
 701         adevc->ospm_status(adev, &prev);
 702     } else {
 703         error_setg(errp, "command is not supported, missing ACPI device");
 704     }
 705
 706     return head;
 707 }