qmp.c

   1 /*
   2  * QEMU Management Protocol
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu-common.h"
  17 #include "sysemu/sysemu.h"
  18 #include "qmp-commands.h"
  19 #include "sysemu/char.h"
  20 #include "ui/qemu-spice.h"
  21 #include "ui/vnc.h"
  22 #include "sysemu/kvm.h"
  23 #include "sysemu/arch_init.h"
  24 #include "hw/qdev.h"
  25 #include "sysemu/blockdev.h"
  26 #include "qom/qom-qobject.h"
  27 #include "qapi/qmp/qobject.h"
  28 #include "qapi/qmp-input-visitor.h"
  29 #include "hw/boards.h"
  30 #include "qom/object_interfaces.h"
  31 #include "hw/mem/pc-dimm.h"
  32 #include "hw/acpi/acpi_dev_interface.h"
  33
  34 NameInfo *qmp_query_name(Error **errp)
  35 {
  36     NameInfo *info = g_malloc0(sizeof(*info));
  37
  38     if (qemu_name) {
  39         info->has_name = true;
  40         info->name = g_strdup(qemu_name);
  41     }
  42
  43     return info;
  44 }
  45
  46 VersionInfo *qmp_query_version(Error **errp)
  47 {
  48     VersionInfo *info = g_malloc0(sizeof(*info));
  49     const char *version = QEMU_VERSION;
  50     char *tmp;
  51
  52     info->qemu.major = strtol(version, &tmp, 10);
  53     tmp++;
  54     info->qemu.minor = strtol(tmp, &tmp, 10);
  55     tmp++;
  56     info->qemu.micro = strtol(tmp, &tmp, 10);
  57     info->package = g_strdup(QEMU_PKGVERSION);
  58
  59     return info;
  60 }
  61
  62 KvmInfo *qmp_query_kvm(Error **errp)
  63 {
  64     KvmInfo *info = g_malloc0(sizeof(*info));
  65
  66     info->enabled = kvm_enabled();
  67     info->present = kvm_available();
  68
  69     return info;
  70 }
  71
  72 UuidInfo *qmp_query_uuid(Error **errp)
  73 {
  74     UuidInfo *info = g_malloc0(sizeof(*info));
  75     char uuid[64];
  76
  77     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  78                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  79                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  80                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  81                    qemu_uuid[14], qemu_uuid[15]);
  82
  83     info->UUID = g_strdup(uuid);
  84     return info;
  85 }
  86
  87 void qmp_quit(Error **errp)
  88 {
  89     no_shutdown = 0;
  90     qemu_system_shutdown_request();
  91 }
  92
  93 void qmp_stop(Error **errp)
  94 {
  95     if (runstate_check(RUN_STATE_INMIGRATE)) {
  96         autostart = 0;
  97     } else {
  98         vm_stop(RUN_STATE_PAUSED);
  99     }
 100 }
 101
 102 void qmp_system_reset(Error **errp)
 103 {
 104     qemu_system_reset_request();
 105 }
 106
 107 void qmp_system_powerdown(Error **erp)
 108 {
 109     qemu_system_powerdown_request();
 110 }
 111
 112 void qmp_cpu(int64_t index, Error **errp)
 113 {
 114     /* Just do nothing */
 115 }
 116
 117 void qmp_cpu_add(int64_t id, Error **errp)
 118 {
 119     MachineClass *mc;
 120
 121     mc = MACHINE_GET_CLASS(current_machine);
 122     if (mc->hot_add_cpu) {
 123         mc->hot_add_cpu(id, errp);
 124     } else {
 125         error_setg(errp, "Not supported");
 126     }
 127 }
 128
 129 #ifndef CONFIG_VNC
 130 /* If VNC support is enabled, the "true" query-vnc command is
 131    defined in the VNC subsystem */
 132 VncInfo *qmp_query_vnc(Error **errp)
 133 {
 134     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 135     return NULL;
 136 };
 137 #endif
 138
 139 #ifndef CONFIG_SPICE
 140 /*
 141  * qmp-commands.hx ensures that QMP command query-spice exists only
 142  * #ifdef CONFIG_SPICE.  Necessary for an accurate query-commands
 143  * result.  However, the QAPI schema is blissfully unaware of that,
 144  * and the QAPI code generator happily generates a dead
 145  * qmp_marshal_input_query_spice() that calls qmp_query_spice().
 146  * Provide it one, or else linking fails.
 147  * FIXME Educate the QAPI schema on CONFIG_SPICE.
 148  */
 149 SpiceInfo *qmp_query_spice(Error **errp)
 150 {
 151     abort();
 152 };
 153 #endif
 154
 155 void qmp_cont(Error **errp)
 156 {
 157     BlockDriverState *bs;
 158
 159     if (runstate_needs_reset()) {
 160         error_setg(errp, "Resetting the Virtual Machine is required");
 161         return;
 162     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 163         return;
 164     }
 165
 166     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 167         bdrv_iostatus_reset(bs);
 168     }
 169     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 170         if (bdrv_key_required(bs)) {
 171             error_set(errp, QERR_DEVICE_ENCRYPTED,
 172                       bdrv_get_device_name(bs),
 173                       bdrv_get_encrypted_filename(bs));
 174             return;
 175         }
 176     }
 177
 178     if (runstate_check(RUN_STATE_INMIGRATE)) {
 179         autostart = 1;
 180     } else {
 181         vm_start();
 182     }
 183 }
 184
 185 void qmp_system_wakeup(Error **errp)
 186 {
 187     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 188 }
 189
 190 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 191 {
 192     Object *obj;
 193     bool ambiguous = false;
 194     ObjectPropertyInfoList *props = NULL;
 195     ObjectProperty *prop;
 196
 197     obj = object_resolve_path(path, &ambiguous);
 198     if (obj == NULL) {
 199         if (ambiguous) {
 200             error_setg(errp, "Path '%s' is ambiguous", path);
 201         } else {
 202             error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 203         }
 204         return NULL;
 205     }
 206
 207     QTAILQ_FOREACH(prop, &obj->properties, node) {
 208         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 209
 210         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 211         entry->next = props;
 212         props = entry;
 213
 214         entry->value->name = g_strdup(prop->name);
 215         entry->value->type = g_strdup(prop->type);
 216     }
 217
 218     return props;
 219 }
 220
 221 /* FIXME: teach qapi about how to pass through Visitors */
 222 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 223 {
 224     const char *path = qdict_get_str(qdict, "path");
 225     const char *property = qdict_get_str(qdict, "property");
 226     QObject *value = qdict_get(qdict, "value");
 227     Error *local_err = NULL;
 228     Object *obj;
 229
 230     obj = object_resolve_path(path, NULL);
 231     if (!obj) {
 232         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 233         goto out;
 234     }
 235
 236     object_property_set_qobject(obj, value, property, &local_err);
 237
 238 out:
 239     if (local_err) {
 240         qerror_report_err(local_err);
 241         error_free(local_err);
 242         return -1;
 243     }
 244
 245     return 0;
 246 }
 247
 248 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 249 {
 250     const char *path = qdict_get_str(qdict, "path");
 251     const char *property = qdict_get_str(qdict, "property");
 252     Error *local_err = NULL;
 253     Object *obj;
 254
 255     obj = object_resolve_path(path, NULL);
 256     if (!obj) {
 257         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 258         goto out;
 259     }
 260
 261     *ret = object_property_get_qobject(obj, property, &local_err);
 262
 263 out:
 264     if (local_err) {
 265         qerror_report_err(local_err);
 266         error_free(local_err);
 267         return -1;
 268     }
 269
 270     return 0;
 271 }
 272
 273 void qmp_set_password(const char *protocol, const char *password,
 274                       bool has_connected, const char *connected, Error **errp)
 275 {
 276     int disconnect_if_connected = 0;
 277     int fail_if_connected = 0;
 278     int rc;
 279
 280     if (has_connected) {
 281         if (strcmp(connected, "fail") == 0) {
 282             fail_if_connected = 1;
 283         } else if (strcmp(connected, "disconnect") == 0) {
 284             disconnect_if_connected = 1;
 285         } else if (strcmp(connected, "keep") == 0) {
 286             /* nothing */
 287         } else {
 288             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 289             return;
 290         }
 291     }
 292
 293     if (strcmp(protocol, "spice") == 0) {
 294         if (!qemu_using_spice(errp)) {
 295             return;
 296         }
 297         rc = qemu_spice_set_passwd(password, fail_if_connected,
 298                                    disconnect_if_connected);
 299         if (rc != 0) {
 300             error_set(errp, QERR_SET_PASSWD_FAILED);
 301         }
 302         return;
 303     }
 304
 305     if (strcmp(protocol, "vnc") == 0) {
 306         if (fail_if_connected || disconnect_if_connected) {
 307             /* vnc supports "connected=keep" only */
 308             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 309             return;
 310         }
 311         /* Note that setting an empty password will not disable login through
 312          * this interface. */
 313         rc = vnc_display_password(NULL, password);
 314         if (rc < 0) {
 315             error_set(errp, QERR_SET_PASSWD_FAILED);
 316         }
 317         return;
 318     }
 319
 320     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 321 }
 322
 323 void qmp_expire_password(const char *protocol, const char *whenstr,
 324                          Error **errp)
 325 {
 326     time_t when;
 327     int rc;
 328
 329     if (strcmp(whenstr, "now") == 0) {
 330         when = 0;
 331     } else if (strcmp(whenstr, "never") == 0) {
 332         when = TIME_MAX;
 333     } else if (whenstr[0] == '+') {
 334         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 335     } else {
 336         when = strtoull(whenstr, NULL, 10);
 337     }
 338
 339     if (strcmp(protocol, "spice") == 0) {
 340         if (!qemu_using_spice(errp)) {
 341             return;
 342         }
 343         rc = qemu_spice_set_pw_expire(when);
 344         if (rc != 0) {
 345             error_set(errp, QERR_SET_PASSWD_FAILED);
 346         }
 347         return;
 348     }
 349
 350     if (strcmp(protocol, "vnc") == 0) {
 351         rc = vnc_display_pw_expire(NULL, when);
 352         if (rc != 0) {
 353             error_set(errp, QERR_SET_PASSWD_FAILED);
 354         }
 355         return;
 356     }
 357
 358     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 359 }
 360
 361 #ifdef CONFIG_VNC
 362 void qmp_change_vnc_password(const char *password, Error **errp)
 363 {
 364     if (vnc_display_password(NULL, password) < 0) {
 365         error_set(errp, QERR_SET_PASSWD_FAILED);
 366     }
 367 }
 368
 369 static void qmp_change_vnc_listen(const char *target, Error **errp)
 370 {
 371     QemuOptsList *olist = qemu_find_opts("vnc");
 372     QemuOpts *opts;
 373
 374     if (strstr(target, "id=")) {
 375         error_setg(errp, "id not supported");
 376         return;
 377     }
 378
 379     opts = qemu_opts_find(olist, "default");
 380     if (opts) {
 381         qemu_opts_del(opts);
 382     }
 383     opts = vnc_parse_func(target);
 384     vnc_display_open("default", errp);
 385 }
 386
 387 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 388                            Error **errp)
 389 {
 390     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 391         if (!has_arg) {
 392             error_set(errp, QERR_MISSING_PARAMETER, "password");
 393         } else {
 394             qmp_change_vnc_password(arg, errp);
 395         }
 396     } else {
 397         qmp_change_vnc_listen(target, errp);
 398     }
 399 }
 400 #else
 401 void qmp_change_vnc_password(const char *password, Error **errp)
 402 {
 403     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 404 }
 405 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 406                            Error **errp)
 407 {
 408     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 409 }
 410 #endif /* !CONFIG_VNC */
 411
 412 void qmp_change(const char *device, const char *target,
 413                 bool has_arg, const char *arg, Error **errp)
 414 {
 415     if (strcmp(device, "vnc") == 0) {
 416         qmp_change_vnc(target, has_arg, arg, errp);
 417     } else {
 418         qmp_change_blockdev(device, target, arg, errp);
 419     }
 420 }
 421
 422 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 423 {
 424     ObjectTypeInfoList *e, **pret = data;
 425     ObjectTypeInfo *info;
 426
 427     info = g_malloc0(sizeof(*info));
 428     info->name = g_strdup(object_class_get_name(klass));
 429
 430     e = g_malloc0(sizeof(*e));
 431     e->value = info;
 432     e->next = *pret;
 433     *pret = e;
 434 }
 435
 436 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 437                                        const char *implements,
 438                                        bool has_abstract,
 439                                        bool abstract,
 440                                        Error **errp)
 441 {
 442     ObjectTypeInfoList *ret = NULL;
 443
 444     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 445
 446     return ret;
 447 }
 448
 449 /* Return a DevicePropertyInfo for a qdev property.
 450  *
 451  * If a qdev property with the given name does not exist, use the given default
 452  * type.  If the qdev property info should not be shown, return NULL.
 453  *
 454  * The caller must free the return value.
 455  */
 456 static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
 457                                                      const char *name,
 458                                                      const char *default_type,
 459                                                      const char *description)
 460 {
 461     DevicePropertyInfo *info;
 462     Property *prop;
 463
 464     do {
 465         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 466             if (strcmp(name, prop->name) != 0) {
 467                 continue;
 468             }
 469
 470             /*
 471              * TODO Properties without a parser are just for dirty hacks.
 472              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 473              * for removal.  This conditional should be removed along with
 474              * it.
 475              */
 476             if (!prop->info->set) {
 477                 return NULL;           /* no way to set it, don't show */
 478             }
 479
 480             info = g_malloc0(sizeof(*info));
 481             info->name = g_strdup(prop->name);
 482             info->type = g_strdup(prop->info->name);
 483             info->has_description = !!prop->info->description;
 484             info->description = g_strdup(prop->info->description);
 485             return info;
 486         }
 487         klass = object_class_get_parent(klass);
 488     } while (klass != object_class_by_name(TYPE_DEVICE));
 489
 490     /* Not a qdev property, use the default type */
 491     info = g_malloc0(sizeof(*info));
 492     info->name = g_strdup(name);
 493     info->type = g_strdup(default_type);
 494     info->has_description = !!description;
 495     info->description = g_strdup(description);
 496
 497     return info;
 498 }
 499
 500 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 501                                                    Error **errp)
 502 {
 503     ObjectClass *klass;
 504     Object *obj;
 505     ObjectProperty *prop;
 506     DevicePropertyInfoList *prop_list = NULL;
 507
 508     klass = object_class_by_name(typename);
 509     if (klass == NULL) {
 510         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 511         return NULL;
 512     }
 513
 514     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 515     if (klass == NULL) {
 516         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 517                   "name", TYPE_DEVICE);
 518         return NULL;
 519     }
 520
 521     obj = object_new(typename);
 522
 523     QTAILQ_FOREACH(prop, &obj->properties, node) {
 524         DevicePropertyInfo *info;
 525         DevicePropertyInfoList *entry;
 526
 527         /* Skip Object and DeviceState properties */
 528         if (strcmp(prop->name, "type") == 0 ||
 529             strcmp(prop->name, "realized") == 0 ||
 530             strcmp(prop->name, "hotpluggable") == 0 ||
 531             strcmp(prop->name, "hotplugged") == 0 ||
 532             strcmp(prop->name, "parent_bus") == 0) {
 533             continue;
 534         }
 535
 536         /* Skip legacy properties since they are just string versions of
 537          * properties that we already list.
 538          */
 539         if (strstart(prop->name, "legacy-", NULL)) {
 540             continue;
 541         }
 542
 543         info = make_device_property_info(klass, prop->name, prop->type,
 544                                          prop->description);
 545         if (!info) {
 546             continue;
 547         }
 548
 549         entry = g_malloc0(sizeof(*entry));
 550         entry->value = info;
 551         entry->next = prop_list;
 552         prop_list = entry;
 553     }
 554
 555     object_unref(obj);
 556
 557     return prop_list;
 558 }
 559
 560 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 561 {
 562     return arch_query_cpu_definitions(errp);
 563 }
 564
 565 void qmp_add_client(const char *protocol, const char *fdname,
 566                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 567                     Error **errp)
 568 {
 569     CharDriverState *s;
 570     int fd;
 571
 572     fd = monitor_get_fd(cur_mon, fdname, errp);
 573     if (fd < 0) {
 574         return;
 575     }
 576
 577     if (strcmp(protocol, "spice") == 0) {
 578         if (!qemu_using_spice(errp)) {
 579             close(fd);
 580             return;
 581         }
 582         skipauth = has_skipauth ? skipauth : false;
 583         tls = has_tls ? tls : false;
 584         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 585             error_setg(errp, "spice failed to add client");
 586             close(fd);
 587         }
 588         return;
 589 #ifdef CONFIG_VNC
 590     } else if (strcmp(protocol, "vnc") == 0) {
 591         skipauth = has_skipauth ? skipauth : false;
 592         vnc_display_add_client(NULL, fd, skipauth);
 593         return;
 594 #endif
 595     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 596         if (qemu_chr_add_client(s, fd) < 0) {
 597             error_setg(errp, "failed to add client");
 598             close(fd);
 599             return;
 600         }
 601         return;
 602     }
 603
 604     error_setg(errp, "protocol '%s' is invalid", protocol);
 605     close(fd);
 606 }
 607
 608 void object_add(const char *type, const char *id, const QDict *qdict,
 609                 Visitor *v, Error **errp)
 610 {
 611     Object *obj;
 612     ObjectClass *klass;
 613     const QDictEntry *e;
 614     Error *local_err = NULL;
 615
 616     klass = object_class_by_name(type);
 617     if (!klass) {
 618         error_setg(errp, "invalid object type: %s", type);
 619         return;
 620     }
 621
 622     if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
 623         error_setg(errp, "object type '%s' isn't supported by object-add",
 624                    type);
 625         return;
 626     }
 627
 628     if (object_class_is_abstract(klass)) {
 629         error_setg(errp, "object type '%s' is abstract", type);
 630         return;
 631     }
 632
 633     obj = object_new(type);
 634     if (qdict) {
 635         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 636             object_property_set(obj, v, e->key, &local_err);
 637             if (local_err) {
 638                 goto out;
 639             }
 640         }
 641     }
 642
 643     object_property_add_child(container_get(object_get_root(), "/objects"),
 644                               id, obj, &local_err);
 645     if (local_err) {
 646         goto out;
 647     }
 648
 649     user_creatable_complete(obj, &local_err);
 650     if (local_err) {
 651         object_property_del(container_get(object_get_root(), "/objects"),
 652                             id, &error_abort);
 653         goto out;
 654     }
 655 out:
 656     if (local_err) {
 657         error_propagate(errp, local_err);
 658     }
 659     object_unref(obj);
 660 }
 661
 662 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 663 {
 664     const char *type = qdict_get_str(qdict, "qom-type");
 665     const char *id = qdict_get_str(qdict, "id");
 666     QObject *props = qdict_get(qdict, "props");
 667     const QDict *pdict = NULL;
 668     Error *local_err = NULL;
 669     QmpInputVisitor *qiv;
 670
 671     if (props) {
 672         pdict = qobject_to_qdict(props);
 673         if (!pdict) {
 674             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 675             goto out;
 676         }
 677     }
 678
 679     qiv = qmp_input_visitor_new(props);
 680     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 681     qmp_input_visitor_cleanup(qiv);
 682
 683 out:
 684     if (local_err) {
 685         qerror_report_err(local_err);
 686         error_free(local_err);
 687         return -1;
 688     }
 689
 690     return 0;
 691 }
 692
 693 void qmp_object_del(const char *id, Error **errp)
 694 {
 695     Object *container;
 696     Object *obj;
 697
 698     container = container_get(object_get_root(), "/objects");
 699     obj = object_resolve_path_component(container, id);
 700     if (!obj) {
 701         error_setg(errp, "object id not found");
 702         return;
 703     }
 704     object_unparent(obj);
 705 }
 706
 707 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 708 {
 709     MemoryDeviceInfoList *head = NULL;
 710     MemoryDeviceInfoList **prev = &head;
 711
 712     qmp_pc_dimm_device_list(qdev_get_machine(), &prev);
 713
 714     return head;
 715 }
 716
 717 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 718 {
 719     bool ambig;
 720     ACPIOSTInfoList *head = NULL;
 721     ACPIOSTInfoList **prev = &head;
 722     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 723
 724     if (obj) {
 725         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 726         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 727
 728         adevc->ospm_status(adev, &prev);
 729     } else {
 730         error_setg(errp, "command is not supported, missing ACPI device");
 731     }
 732
 733     return head;
 734 }