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
  32 NameInfo *qmp_query_name(Error **errp)
  33 {
  34     NameInfo *info = g_malloc0(sizeof(*info));
  35
  36     if (qemu_name) {
  37         info->has_name = true;
  38         info->name = g_strdup(qemu_name);
  39     }
  40
  41     return info;
  42 }
  43
  44 VersionInfo *qmp_query_version(Error **err)
  45 {
  46     VersionInfo *info = g_malloc0(sizeof(*info));
  47     const char *version = QEMU_VERSION;
  48     char *tmp;
  49
  50     info->qemu.major = strtol(version, &tmp, 10);
  51     tmp++;
  52     info->qemu.minor = strtol(tmp, &tmp, 10);
  53     tmp++;
  54     info->qemu.micro = strtol(tmp, &tmp, 10);
  55     info->package = g_strdup(QEMU_PKGVERSION);
  56
  57     return info;
  58 }
  59
  60 KvmInfo *qmp_query_kvm(Error **errp)
  61 {
  62     KvmInfo *info = g_malloc0(sizeof(*info));
  63
  64     info->enabled = kvm_enabled();
  65     info->present = kvm_available();
  66
  67     return info;
  68 }
  69
  70 UuidInfo *qmp_query_uuid(Error **errp)
  71 {
  72     UuidInfo *info = g_malloc0(sizeof(*info));
  73     char uuid[64];
  74
  75     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  76                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  77                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  78                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  79                    qemu_uuid[14], qemu_uuid[15]);
  80
  81     info->UUID = g_strdup(uuid);
  82     return info;
  83 }
  84
  85 void qmp_quit(Error **err)
  86 {
  87     no_shutdown = 0;
  88     qemu_system_shutdown_request();
  89 }
  90
  91 void qmp_stop(Error **errp)
  92 {
  93     if (runstate_check(RUN_STATE_INMIGRATE)) {
  94         autostart = 0;
  95     } else {
  96         vm_stop(RUN_STATE_PAUSED);
  97     }
  98 }
  99
 100 void qmp_system_reset(Error **errp)
 101 {
 102     qemu_system_reset_request();
 103 }
 104
 105 void qmp_system_powerdown(Error **erp)
 106 {
 107     qemu_system_powerdown_request();
 108 }
 109
 110 void qmp_cpu(int64_t index, Error **errp)
 111 {
 112     /* Just do nothing */
 113 }
 114
 115 void qmp_cpu_add(int64_t id, Error **errp)
 116 {
 117     MachineClass *mc;
 118
 119     mc = MACHINE_GET_CLASS(current_machine);
 120     if (mc->qemu_machine->hot_add_cpu) {
 121         mc->qemu_machine->hot_add_cpu(id, errp);
 122     } else {
 123         error_setg(errp, "Not supported");
 124     }
 125 }
 126
 127 #ifndef CONFIG_VNC
 128 /* If VNC support is enabled, the "true" query-vnc command is
 129    defined in the VNC subsystem */
 130 VncInfo *qmp_query_vnc(Error **errp)
 131 {
 132     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 133     return NULL;
 134 };
 135 #endif
 136
 137 #ifndef CONFIG_SPICE
 138 /* If SPICE support is enabled, the "true" query-spice command is
 139    defined in the SPICE subsystem. Also note that we use a small
 140    trick to maintain query-spice's original behavior, which is not
 141    to be available in the namespace if SPICE is not compiled in */
 142 SpiceInfo *qmp_query_spice(Error **errp)
 143 {
 144     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 145     return NULL;
 146 };
 147 #endif
 148
 149 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 150 {
 151     bdrv_iostatus_reset(bs);
 152 }
 153
 154 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 155 {
 156     Error **err = opaque;
 157
 158     if (!error_is_set(err) && bdrv_key_required(bs)) {
 159         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
 160                   bdrv_get_encrypted_filename(bs));
 161     }
 162 }
 163
 164 void qmp_cont(Error **errp)
 165 {
 166     Error *local_err = NULL;
 167
 168     if (runstate_needs_reset()) {
 169         error_setg(errp, "Resetting the Virtual Machine is required");
 170         return;
 171     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 172         return;
 173     }
 174
 175     bdrv_iterate(iostatus_bdrv_it, NULL);
 176     bdrv_iterate(encrypted_bdrv_it, &local_err);
 177     if (local_err) {
 178         error_propagate(errp, local_err);
 179         return;
 180     }
 181
 182     if (runstate_check(RUN_STATE_INMIGRATE)) {
 183         autostart = 1;
 184     } else {
 185         vm_start();
 186     }
 187 }
 188
 189 void qmp_system_wakeup(Error **errp)
 190 {
 191     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 192 }
 193
 194 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 195 {
 196     Object *obj;
 197     bool ambiguous = false;
 198     ObjectPropertyInfoList *props = NULL;
 199     ObjectProperty *prop;
 200
 201     obj = object_resolve_path(path, &ambiguous);
 202     if (obj == NULL) {
 203         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 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 (!using_spice) {
 295             /* correct one? spice isn't a device ,,, */
 296             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 297             return;
 298         }
 299         rc = qemu_spice_set_passwd(password, fail_if_connected,
 300                                    disconnect_if_connected);
 301         if (rc != 0) {
 302             error_set(errp, QERR_SET_PASSWD_FAILED);
 303         }
 304         return;
 305     }
 306
 307     if (strcmp(protocol, "vnc") == 0) {
 308         if (fail_if_connected || disconnect_if_connected) {
 309             /* vnc supports "connected=keep" only */
 310             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 311             return;
 312         }
 313         /* Note that setting an empty password will not disable login through
 314          * this interface. */
 315         rc = vnc_display_password(NULL, password);
 316         if (rc < 0) {
 317             error_set(errp, QERR_SET_PASSWD_FAILED);
 318         }
 319         return;
 320     }
 321
 322     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 323 }
 324
 325 void qmp_expire_password(const char *protocol, const char *whenstr,
 326                          Error **errp)
 327 {
 328     time_t when;
 329     int rc;
 330
 331     if (strcmp(whenstr, "now") == 0) {
 332         when = 0;
 333     } else if (strcmp(whenstr, "never") == 0) {
 334         when = TIME_MAX;
 335     } else if (whenstr[0] == '+') {
 336         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 337     } else {
 338         when = strtoull(whenstr, NULL, 10);
 339     }
 340
 341     if (strcmp(protocol, "spice") == 0) {
 342         if (!using_spice) {
 343             /* correct one? spice isn't a device ,,, */
 344             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 345             return;
 346         }
 347         rc = qemu_spice_set_pw_expire(when);
 348         if (rc != 0) {
 349             error_set(errp, QERR_SET_PASSWD_FAILED);
 350         }
 351         return;
 352     }
 353
 354     if (strcmp(protocol, "vnc") == 0) {
 355         rc = vnc_display_pw_expire(NULL, when);
 356         if (rc != 0) {
 357             error_set(errp, QERR_SET_PASSWD_FAILED);
 358         }
 359         return;
 360     }
 361
 362     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 363 }
 364
 365 #ifdef CONFIG_VNC
 366 void qmp_change_vnc_password(const char *password, Error **errp)
 367 {
 368     if (vnc_display_password(NULL, password) < 0) {
 369         error_set(errp, QERR_SET_PASSWD_FAILED);
 370     }
 371 }
 372
 373 static void qmp_change_vnc_listen(const char *target, Error **errp)
 374 {
 375     vnc_display_open(NULL, target, errp);
 376 }
 377
 378 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 379                            Error **errp)
 380 {
 381     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 382         if (!has_arg) {
 383             error_set(errp, QERR_MISSING_PARAMETER, "password");
 384         } else {
 385             qmp_change_vnc_password(arg, errp);
 386         }
 387     } else {
 388         qmp_change_vnc_listen(target, errp);
 389     }
 390 }
 391 #else
 392 void qmp_change_vnc_password(const char *password, Error **errp)
 393 {
 394     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 395 }
 396 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 397                            Error **errp)
 398 {
 399     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 400 }
 401 #endif /* !CONFIG_VNC */
 402
 403 void qmp_change(const char *device, const char *target,
 404                 bool has_arg, const char *arg, Error **err)
 405 {
 406     if (strcmp(device, "vnc") == 0) {
 407         qmp_change_vnc(target, has_arg, arg, err);
 408     } else {
 409         qmp_change_blockdev(device, target, arg, err);
 410     }
 411 }
 412
 413 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 414 {
 415     ObjectTypeInfoList *e, **pret = data;
 416     ObjectTypeInfo *info;
 417
 418     info = g_malloc0(sizeof(*info));
 419     info->name = g_strdup(object_class_get_name(klass));
 420
 421     e = g_malloc0(sizeof(*e));
 422     e->value = info;
 423     e->next = *pret;
 424     *pret = e;
 425 }
 426
 427 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 428                                        const char *implements,
 429                                        bool has_abstract,
 430                                        bool abstract,
 431                                        Error **errp)
 432 {
 433     ObjectTypeInfoList *ret = NULL;
 434
 435     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 436
 437     return ret;
 438 }
 439
 440 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 441                                                    Error **errp)
 442 {
 443     ObjectClass *klass;
 444     Property *prop;
 445     DevicePropertyInfoList *prop_list = NULL;
 446
 447     klass = object_class_by_name(typename);
 448     if (klass == NULL) {
 449         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 450         return NULL;
 451     }
 452
 453     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 454     if (klass == NULL) {
 455         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 456                   "name", TYPE_DEVICE);
 457         return NULL;
 458     }
 459
 460     do {
 461         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 462             DevicePropertyInfoList *entry;
 463             DevicePropertyInfo *info;
 464
 465             /*
 466              * TODO Properties without a parser are just for dirty hacks.
 467              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 468              * for removal.  This conditional should be removed along with
 469              * it.
 470              */
 471             if (!prop->info->set) {
 472                 continue;           /* no way to set it, don't show */
 473             }
 474
 475             info = g_malloc0(sizeof(*info));
 476             info->name = g_strdup(prop->name);
 477             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 478
 479             entry = g_malloc0(sizeof(*entry));
 480             entry->value = info;
 481             entry->next = prop_list;
 482             prop_list = entry;
 483         }
 484         klass = object_class_get_parent(klass);
 485     } while (klass != object_class_by_name(TYPE_DEVICE));
 486
 487     return prop_list;
 488 }
 489
 490 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 491 {
 492     return arch_query_cpu_definitions(errp);
 493 }
 494
 495 void qmp_add_client(const char *protocol, const char *fdname,
 496                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 497                     Error **errp)
 498 {
 499     CharDriverState *s;
 500     int fd;
 501
 502     fd = monitor_get_fd(cur_mon, fdname, errp);
 503     if (fd < 0) {
 504         return;
 505     }
 506
 507     if (strcmp(protocol, "spice") == 0) {
 508         if (!using_spice) {
 509             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 510             close(fd);
 511             return;
 512         }
 513         skipauth = has_skipauth ? skipauth : false;
 514         tls = has_tls ? tls : false;
 515         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 516             error_setg(errp, "spice failed to add client");
 517             close(fd);
 518         }
 519         return;
 520 #ifdef CONFIG_VNC
 521     } else if (strcmp(protocol, "vnc") == 0) {
 522         skipauth = has_skipauth ? skipauth : false;
 523         vnc_display_add_client(NULL, fd, skipauth);
 524         return;
 525 #endif
 526     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 527         if (qemu_chr_add_client(s, fd) < 0) {
 528             error_setg(errp, "failed to add client");
 529             close(fd);
 530             return;
 531         }
 532         return;
 533     }
 534
 535     error_setg(errp, "protocol '%s' is invalid", protocol);
 536     close(fd);
 537 }
 538
 539 void object_add(const char *type, const char *id, const QDict *qdict,
 540                 Visitor *v, Error **errp)
 541 {
 542     Object *obj;
 543     const QDictEntry *e;
 544     Error *local_err = NULL;
 545
 546     if (!object_class_by_name(type)) {
 547         error_setg(errp, "invalid class name");
 548         return;
 549     }
 550
 551     obj = object_new(type);
 552     if (qdict) {
 553         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 554             object_property_set(obj, v, e->key, &local_err);
 555             if (local_err) {
 556                 goto out;
 557             }
 558         }
 559     }
 560
 561     if (!object_dynamic_cast(obj, TYPE_USER_CREATABLE)) {
 562         error_setg(&local_err, "object type '%s' isn't supported by object-add",
 563                    type);
 564         goto out;
 565     }
 566
 567     user_creatable_complete(obj, &local_err);
 568     if (local_err) {
 569         goto out;
 570     }
 571
 572     object_property_add_child(container_get(object_get_root(), "/objects"),
 573                               id, obj, &local_err);
 574 out:
 575     if (local_err) {
 576         error_propagate(errp, local_err);
 577     }
 578     object_unref(obj);
 579 }
 580
 581 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 582 {
 583     const char *type = qdict_get_str(qdict, "qom-type");
 584     const char *id = qdict_get_str(qdict, "id");
 585     QObject *props = qdict_get(qdict, "props");
 586     const QDict *pdict = NULL;
 587     Error *local_err = NULL;
 588     QmpInputVisitor *qiv;
 589
 590     if (props) {
 591         pdict = qobject_to_qdict(props);
 592         if (!pdict) {
 593             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 594             goto out;
 595         }
 596     }
 597
 598     qiv = qmp_input_visitor_new(props);
 599     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 600     qmp_input_visitor_cleanup(qiv);
 601
 602 out:
 603     if (local_err) {
 604         qerror_report_err(local_err);
 605         error_free(local_err);
 606         return -1;
 607     }
 608
 609     return 0;
 610 }
 611
 612 void qmp_object_del(const char *id, Error **errp)
 613 {
 614     Object *container;
 615     Object *obj;
 616
 617     container = container_get(object_get_root(), "/objects");
 618     obj = object_resolve_path_component(container, id);
 619     if (!obj) {
 620         error_setg(errp, "object id not found");
 621         return;
 622     }
 623     object_unparent(obj);
 624 }