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 **errp)
  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 **errp)
  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->hot_add_cpu) {
 121         mc->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 **errp = opaque;
 157
 158     if (!error_is_set(errp) && bdrv_key_required(bs)) {
 159         error_set(errp, 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         if (ambiguous) {
 204             error_setg(errp, "Path '%s' is ambiguous", path);
 205         } else {
 206             error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 207         }
 208         return NULL;
 209     }
 210
 211     QTAILQ_FOREACH(prop, &obj->properties, node) {
 212         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 213
 214         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 215         entry->next = props;
 216         props = entry;
 217
 218         entry->value->name = g_strdup(prop->name);
 219         entry->value->type = g_strdup(prop->type);
 220     }
 221
 222     return props;
 223 }
 224
 225 /* FIXME: teach qapi about how to pass through Visitors */
 226 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 227 {
 228     const char *path = qdict_get_str(qdict, "path");
 229     const char *property = qdict_get_str(qdict, "property");
 230     QObject *value = qdict_get(qdict, "value");
 231     Error *local_err = NULL;
 232     Object *obj;
 233
 234     obj = object_resolve_path(path, NULL);
 235     if (!obj) {
 236         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 237         goto out;
 238     }
 239
 240     object_property_set_qobject(obj, value, property, &local_err);
 241
 242 out:
 243     if (local_err) {
 244         qerror_report_err(local_err);
 245         error_free(local_err);
 246         return -1;
 247     }
 248
 249     return 0;
 250 }
 251
 252 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 253 {
 254     const char *path = qdict_get_str(qdict, "path");
 255     const char *property = qdict_get_str(qdict, "property");
 256     Error *local_err = NULL;
 257     Object *obj;
 258
 259     obj = object_resolve_path(path, NULL);
 260     if (!obj) {
 261         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 262         goto out;
 263     }
 264
 265     *ret = object_property_get_qobject(obj, property, &local_err);
 266
 267 out:
 268     if (local_err) {
 269         qerror_report_err(local_err);
 270         error_free(local_err);
 271         return -1;
 272     }
 273
 274     return 0;
 275 }
 276
 277 void qmp_set_password(const char *protocol, const char *password,
 278                       bool has_connected, const char *connected, Error **errp)
 279 {
 280     int disconnect_if_connected = 0;
 281     int fail_if_connected = 0;
 282     int rc;
 283
 284     if (has_connected) {
 285         if (strcmp(connected, "fail") == 0) {
 286             fail_if_connected = 1;
 287         } else if (strcmp(connected, "disconnect") == 0) {
 288             disconnect_if_connected = 1;
 289         } else if (strcmp(connected, "keep") == 0) {
 290             /* nothing */
 291         } else {
 292             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 293             return;
 294         }
 295     }
 296
 297     if (strcmp(protocol, "spice") == 0) {
 298         if (!using_spice) {
 299             /* correct one? spice isn't a device ,,, */
 300             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 301             return;
 302         }
 303         rc = qemu_spice_set_passwd(password, fail_if_connected,
 304                                    disconnect_if_connected);
 305         if (rc != 0) {
 306             error_set(errp, QERR_SET_PASSWD_FAILED);
 307         }
 308         return;
 309     }
 310
 311     if (strcmp(protocol, "vnc") == 0) {
 312         if (fail_if_connected || disconnect_if_connected) {
 313             /* vnc supports "connected=keep" only */
 314             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 315             return;
 316         }
 317         /* Note that setting an empty password will not disable login through
 318          * this interface. */
 319         rc = vnc_display_password(NULL, password);
 320         if (rc < 0) {
 321             error_set(errp, QERR_SET_PASSWD_FAILED);
 322         }
 323         return;
 324     }
 325
 326     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 327 }
 328
 329 void qmp_expire_password(const char *protocol, const char *whenstr,
 330                          Error **errp)
 331 {
 332     time_t when;
 333     int rc;
 334
 335     if (strcmp(whenstr, "now") == 0) {
 336         when = 0;
 337     } else if (strcmp(whenstr, "never") == 0) {
 338         when = TIME_MAX;
 339     } else if (whenstr[0] == '+') {
 340         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 341     } else {
 342         when = strtoull(whenstr, NULL, 10);
 343     }
 344
 345     if (strcmp(protocol, "spice") == 0) {
 346         if (!using_spice) {
 347             /* correct one? spice isn't a device ,,, */
 348             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 349             return;
 350         }
 351         rc = qemu_spice_set_pw_expire(when);
 352         if (rc != 0) {
 353             error_set(errp, QERR_SET_PASSWD_FAILED);
 354         }
 355         return;
 356     }
 357
 358     if (strcmp(protocol, "vnc") == 0) {
 359         rc = vnc_display_pw_expire(NULL, when);
 360         if (rc != 0) {
 361             error_set(errp, QERR_SET_PASSWD_FAILED);
 362         }
 363         return;
 364     }
 365
 366     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 367 }
 368
 369 #ifdef CONFIG_VNC
 370 void qmp_change_vnc_password(const char *password, Error **errp)
 371 {
 372     if (vnc_display_password(NULL, password) < 0) {
 373         error_set(errp, QERR_SET_PASSWD_FAILED);
 374     }
 375 }
 376
 377 static void qmp_change_vnc_listen(const char *target, Error **errp)
 378 {
 379     vnc_display_open(NULL, target, errp);
 380 }
 381
 382 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 383                            Error **errp)
 384 {
 385     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 386         if (!has_arg) {
 387             error_set(errp, QERR_MISSING_PARAMETER, "password");
 388         } else {
 389             qmp_change_vnc_password(arg, errp);
 390         }
 391     } else {
 392         qmp_change_vnc_listen(target, errp);
 393     }
 394 }
 395 #else
 396 void qmp_change_vnc_password(const char *password, Error **errp)
 397 {
 398     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 399 }
 400 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 401                            Error **errp)
 402 {
 403     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 404 }
 405 #endif /* !CONFIG_VNC */
 406
 407 void qmp_change(const char *device, const char *target,
 408                 bool has_arg, const char *arg, Error **errp)
 409 {
 410     if (strcmp(device, "vnc") == 0) {
 411         qmp_change_vnc(target, has_arg, arg, errp);
 412     } else {
 413         qmp_change_blockdev(device, target, arg, errp);
 414     }
 415 }
 416
 417 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 418 {
 419     ObjectTypeInfoList *e, **pret = data;
 420     ObjectTypeInfo *info;
 421
 422     info = g_malloc0(sizeof(*info));
 423     info->name = g_strdup(object_class_get_name(klass));
 424
 425     e = g_malloc0(sizeof(*e));
 426     e->value = info;
 427     e->next = *pret;
 428     *pret = e;
 429 }
 430
 431 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 432                                        const char *implements,
 433                                        bool has_abstract,
 434                                        bool abstract,
 435                                        Error **errp)
 436 {
 437     ObjectTypeInfoList *ret = NULL;
 438
 439     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 440
 441     return ret;
 442 }
 443
 444 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 445                                                    Error **errp)
 446 {
 447     ObjectClass *klass;
 448     Property *prop;
 449     DevicePropertyInfoList *prop_list = NULL;
 450
 451     klass = object_class_by_name(typename);
 452     if (klass == NULL) {
 453         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 454         return NULL;
 455     }
 456
 457     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 458     if (klass == NULL) {
 459         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 460                   "name", TYPE_DEVICE);
 461         return NULL;
 462     }
 463
 464     do {
 465         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 466             DevicePropertyInfoList *entry;
 467             DevicePropertyInfo *info;
 468
 469             /*
 470              * TODO Properties without a parser are just for dirty hacks.
 471              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 472              * for removal.  This conditional should be removed along with
 473              * it.
 474              */
 475             if (!prop->info->set) {
 476                 continue;           /* no way to set it, don't show */
 477             }
 478
 479             info = g_malloc0(sizeof(*info));
 480             info->name = g_strdup(prop->name);
 481             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 482
 483             entry = g_malloc0(sizeof(*entry));
 484             entry->value = info;
 485             entry->next = prop_list;
 486             prop_list = entry;
 487         }
 488         klass = object_class_get_parent(klass);
 489     } while (klass != object_class_by_name(TYPE_DEVICE));
 490
 491     return prop_list;
 492 }
 493
 494 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 495 {
 496     return arch_query_cpu_definitions(errp);
 497 }
 498
 499 void qmp_add_client(const char *protocol, const char *fdname,
 500                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 501                     Error **errp)
 502 {
 503     CharDriverState *s;
 504     int fd;
 505
 506     fd = monitor_get_fd(cur_mon, fdname, errp);
 507     if (fd < 0) {
 508         return;
 509     }
 510
 511     if (strcmp(protocol, "spice") == 0) {
 512         if (!using_spice) {
 513             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 514             close(fd);
 515             return;
 516         }
 517         skipauth = has_skipauth ? skipauth : false;
 518         tls = has_tls ? tls : false;
 519         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 520             error_setg(errp, "spice failed to add client");
 521             close(fd);
 522         }
 523         return;
 524 #ifdef CONFIG_VNC
 525     } else if (strcmp(protocol, "vnc") == 0) {
 526         skipauth = has_skipauth ? skipauth : false;
 527         vnc_display_add_client(NULL, fd, skipauth);
 528         return;
 529 #endif
 530     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 531         if (qemu_chr_add_client(s, fd) < 0) {
 532             error_setg(errp, "failed to add client");
 533             close(fd);
 534             return;
 535         }
 536         return;
 537     }
 538
 539     error_setg(errp, "protocol '%s' is invalid", protocol);
 540     close(fd);
 541 }
 542
 543 void object_add(const char *type, const char *id, const QDict *qdict,
 544                 Visitor *v, Error **errp)
 545 {
 546     Object *obj;
 547     ObjectClass *klass;
 548     const QDictEntry *e;
 549     Error *local_err = NULL;
 550
 551     klass = object_class_by_name(type);
 552     if (!klass) {
 553         error_setg(errp, "invalid class name");
 554         return;
 555     }
 556
 557     if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
 558         error_setg(errp, "object type '%s' isn't supported by object-add",
 559                    type);
 560         return;
 561     }
 562
 563     if (object_class_is_abstract(klass)) {
 564         error_setg(errp, "object type '%s' is abstract", type);
 565         return;
 566     }
 567
 568     obj = object_new(type);
 569     if (qdict) {
 570         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 571             object_property_set(obj, v, e->key, &local_err);
 572             if (local_err) {
 573                 goto out;
 574             }
 575         }
 576     }
 577
 578     user_creatable_complete(obj, &local_err);
 579     if (local_err) {
 580         goto out;
 581     }
 582
 583     object_property_add_child(container_get(object_get_root(), "/objects"),
 584                               id, obj, &local_err);
 585 out:
 586     if (local_err) {
 587         error_propagate(errp, local_err);
 588     }
 589     object_unref(obj);
 590 }
 591
 592 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 593 {
 594     const char *type = qdict_get_str(qdict, "qom-type");
 595     const char *id = qdict_get_str(qdict, "id");
 596     QObject *props = qdict_get(qdict, "props");
 597     const QDict *pdict = NULL;
 598     Error *local_err = NULL;
 599     QmpInputVisitor *qiv;
 600
 601     if (props) {
 602         pdict = qobject_to_qdict(props);
 603         if (!pdict) {
 604             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 605             goto out;
 606         }
 607     }
 608
 609     qiv = qmp_input_visitor_new(props);
 610     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 611     qmp_input_visitor_cleanup(qiv);
 612
 613 out:
 614     if (local_err) {
 615         qerror_report_err(local_err);
 616         error_free(local_err);
 617         return -1;
 618     }
 619
 620     return 0;
 621 }
 622
 623 void qmp_object_del(const char *id, Error **errp)
 624 {
 625     Object *container;
 626     Object *obj;
 627
 628     container = container_get(object_get_root(), "/objects");
 629     obj = object_resolve_path_component(container, id);
 630     if (!obj) {
 631         error_setg(errp, "object id not found");
 632         return;
 633     }
 634     object_unparent(obj);
 635 }