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     if (current_machine->hot_add_cpu) {
 118         current_machine->hot_add_cpu(id, errp);
 119     } else {
 120         error_setg(errp, "Not supported");
 121     }
 122 }
 123
 124 #ifndef CONFIG_VNC
 125 /* If VNC support is enabled, the "true" query-vnc command is
 126    defined in the VNC subsystem */
 127 VncInfo *qmp_query_vnc(Error **errp)
 128 {
 129     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 130     return NULL;
 131 };
 132 #endif
 133
 134 #ifndef CONFIG_SPICE
 135 /* If SPICE support is enabled, the "true" query-spice command is
 136    defined in the SPICE subsystem. Also note that we use a small
 137    trick to maintain query-spice's original behavior, which is not
 138    to be available in the namespace if SPICE is not compiled in */
 139 SpiceInfo *qmp_query_spice(Error **errp)
 140 {
 141     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 142     return NULL;
 143 };
 144 #endif
 145
 146 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 147 {
 148     bdrv_iostatus_reset(bs);
 149 }
 150
 151 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 152 {
 153     Error **err = opaque;
 154
 155     if (!error_is_set(err) && bdrv_key_required(bs)) {
 156         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
 157                   bdrv_get_encrypted_filename(bs));
 158     }
 159 }
 160
 161 void qmp_cont(Error **errp)
 162 {
 163     Error *local_err = NULL;
 164
 165     if (runstate_needs_reset()) {
 166         error_set(errp, QERR_RESET_REQUIRED);
 167         return;
 168     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 169         return;
 170     }
 171
 172     bdrv_iterate(iostatus_bdrv_it, NULL);
 173     bdrv_iterate(encrypted_bdrv_it, &local_err);
 174     if (local_err) {
 175         error_propagate(errp, local_err);
 176         return;
 177     }
 178
 179     if (runstate_check(RUN_STATE_INMIGRATE)) {
 180         autostart = 1;
 181     } else {
 182         vm_start();
 183     }
 184 }
 185
 186 void qmp_system_wakeup(Error **errp)
 187 {
 188     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 189 }
 190
 191 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 192 {
 193     Object *obj;
 194     bool ambiguous = false;
 195     ObjectPropertyInfoList *props = NULL;
 196     ObjectProperty *prop;
 197
 198     obj = object_resolve_path(path, &ambiguous);
 199     if (obj == NULL) {
 200         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 201         return NULL;
 202     }
 203
 204     QTAILQ_FOREACH(prop, &obj->properties, node) {
 205         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 206
 207         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 208         entry->next = props;
 209         props = entry;
 210
 211         entry->value->name = g_strdup(prop->name);
 212         entry->value->type = g_strdup(prop->type);
 213     }
 214
 215     return props;
 216 }
 217
 218 /* FIXME: teach qapi about how to pass through Visitors */
 219 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 220 {
 221     const char *path = qdict_get_str(qdict, "path");
 222     const char *property = qdict_get_str(qdict, "property");
 223     QObject *value = qdict_get(qdict, "value");
 224     Error *local_err = NULL;
 225     Object *obj;
 226
 227     obj = object_resolve_path(path, NULL);
 228     if (!obj) {
 229         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 230         goto out;
 231     }
 232
 233     object_property_set_qobject(obj, value, property, &local_err);
 234
 235 out:
 236     if (local_err) {
 237         qerror_report_err(local_err);
 238         error_free(local_err);
 239         return -1;
 240     }
 241
 242     return 0;
 243 }
 244
 245 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 246 {
 247     const char *path = qdict_get_str(qdict, "path");
 248     const char *property = qdict_get_str(qdict, "property");
 249     Error *local_err = NULL;
 250     Object *obj;
 251
 252     obj = object_resolve_path(path, NULL);
 253     if (!obj) {
 254         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 255         goto out;
 256     }
 257
 258     *ret = object_property_get_qobject(obj, property, &local_err);
 259
 260 out:
 261     if (local_err) {
 262         qerror_report_err(local_err);
 263         error_free(local_err);
 264         return -1;
 265     }
 266
 267     return 0;
 268 }
 269
 270 void qmp_set_password(const char *protocol, const char *password,
 271                       bool has_connected, const char *connected, Error **errp)
 272 {
 273     int disconnect_if_connected = 0;
 274     int fail_if_connected = 0;
 275     int rc;
 276
 277     if (has_connected) {
 278         if (strcmp(connected, "fail") == 0) {
 279             fail_if_connected = 1;
 280         } else if (strcmp(connected, "disconnect") == 0) {
 281             disconnect_if_connected = 1;
 282         } else if (strcmp(connected, "keep") == 0) {
 283             /* nothing */
 284         } else {
 285             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 286             return;
 287         }
 288     }
 289
 290     if (strcmp(protocol, "spice") == 0) {
 291         if (!using_spice) {
 292             /* correct one? spice isn't a device ,,, */
 293             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 294             return;
 295         }
 296         rc = qemu_spice_set_passwd(password, fail_if_connected,
 297                                    disconnect_if_connected);
 298         if (rc != 0) {
 299             error_set(errp, QERR_SET_PASSWD_FAILED);
 300         }
 301         return;
 302     }
 303
 304     if (strcmp(protocol, "vnc") == 0) {
 305         if (fail_if_connected || disconnect_if_connected) {
 306             /* vnc supports "connected=keep" only */
 307             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 308             return;
 309         }
 310         /* Note that setting an empty password will not disable login through
 311          * this interface. */
 312         rc = vnc_display_password(NULL, password);
 313         if (rc < 0) {
 314             error_set(errp, QERR_SET_PASSWD_FAILED);
 315         }
 316         return;
 317     }
 318
 319     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 320 }
 321
 322 void qmp_expire_password(const char *protocol, const char *whenstr,
 323                          Error **errp)
 324 {
 325     time_t when;
 326     int rc;
 327
 328     if (strcmp(whenstr, "now") == 0) {
 329         when = 0;
 330     } else if (strcmp(whenstr, "never") == 0) {
 331         when = TIME_MAX;
 332     } else if (whenstr[0] == '+') {
 333         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 334     } else {
 335         when = strtoull(whenstr, NULL, 10);
 336     }
 337
 338     if (strcmp(protocol, "spice") == 0) {
 339         if (!using_spice) {
 340             /* correct one? spice isn't a device ,,, */
 341             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 342             return;
 343         }
 344         rc = qemu_spice_set_pw_expire(when);
 345         if (rc != 0) {
 346             error_set(errp, QERR_SET_PASSWD_FAILED);
 347         }
 348         return;
 349     }
 350
 351     if (strcmp(protocol, "vnc") == 0) {
 352         rc = vnc_display_pw_expire(NULL, when);
 353         if (rc != 0) {
 354             error_set(errp, QERR_SET_PASSWD_FAILED);
 355         }
 356         return;
 357     }
 358
 359     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 360 }
 361
 362 #ifdef CONFIG_VNC
 363 void qmp_change_vnc_password(const char *password, Error **errp)
 364 {
 365     if (vnc_display_password(NULL, password) < 0) {
 366         error_set(errp, QERR_SET_PASSWD_FAILED);
 367     }
 368 }
 369
 370 static void qmp_change_vnc_listen(const char *target, Error **errp)
 371 {
 372     vnc_display_open(NULL, target, errp);
 373 }
 374
 375 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 376                            Error **errp)
 377 {
 378     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 379         if (!has_arg) {
 380             error_set(errp, QERR_MISSING_PARAMETER, "password");
 381         } else {
 382             qmp_change_vnc_password(arg, errp);
 383         }
 384     } else {
 385         qmp_change_vnc_listen(target, errp);
 386     }
 387 }
 388 #else
 389 void qmp_change_vnc_password(const char *password, Error **errp)
 390 {
 391     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 392 }
 393 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 394                            Error **errp)
 395 {
 396     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 397 }
 398 #endif /* !CONFIG_VNC */
 399
 400 void qmp_change(const char *device, const char *target,
 401                 bool has_arg, const char *arg, Error **err)
 402 {
 403     if (strcmp(device, "vnc") == 0) {
 404         qmp_change_vnc(target, has_arg, arg, err);
 405     } else {
 406         qmp_change_blockdev(device, target, arg, err);
 407     }
 408 }
 409
 410 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 411 {
 412     ObjectTypeInfoList *e, **pret = data;
 413     ObjectTypeInfo *info;
 414
 415     info = g_malloc0(sizeof(*info));
 416     info->name = g_strdup(object_class_get_name(klass));
 417
 418     e = g_malloc0(sizeof(*e));
 419     e->value = info;
 420     e->next = *pret;
 421     *pret = e;
 422 }
 423
 424 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 425                                        const char *implements,
 426                                        bool has_abstract,
 427                                        bool abstract,
 428                                        Error **errp)
 429 {
 430     ObjectTypeInfoList *ret = NULL;
 431
 432     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 433
 434     return ret;
 435 }
 436
 437 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 438                                                    Error **errp)
 439 {
 440     ObjectClass *klass;
 441     Property *prop;
 442     DevicePropertyInfoList *prop_list = NULL;
 443
 444     klass = object_class_by_name(typename);
 445     if (klass == NULL) {
 446         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 447         return NULL;
 448     }
 449
 450     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 451     if (klass == NULL) {
 452         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 453                   "name", TYPE_DEVICE);
 454         return NULL;
 455     }
 456
 457     do {
 458         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 459             DevicePropertyInfoList *entry;
 460             DevicePropertyInfo *info;
 461
 462             /*
 463              * TODO Properties without a parser are just for dirty hacks.
 464              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 465              * for removal.  This conditional should be removed along with
 466              * it.
 467              */
 468             if (!prop->info->set) {
 469                 continue;           /* no way to set it, don't show */
 470             }
 471
 472             info = g_malloc0(sizeof(*info));
 473             info->name = g_strdup(prop->name);
 474             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 475
 476             entry = g_malloc0(sizeof(*entry));
 477             entry->value = info;
 478             entry->next = prop_list;
 479             prop_list = entry;
 480         }
 481         klass = object_class_get_parent(klass);
 482     } while (klass != object_class_by_name(TYPE_DEVICE));
 483
 484     return prop_list;
 485 }
 486
 487 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 488 {
 489     return arch_query_cpu_definitions(errp);
 490 }
 491
 492 void qmp_add_client(const char *protocol, const char *fdname,
 493                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 494                     Error **errp)
 495 {
 496     CharDriverState *s;
 497     int fd;
 498
 499     fd = monitor_get_fd(cur_mon, fdname, errp);
 500     if (fd < 0) {
 501         return;
 502     }
 503
 504     if (strcmp(protocol, "spice") == 0) {
 505         if (!using_spice) {
 506             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 507             close(fd);
 508             return;
 509         }
 510         skipauth = has_skipauth ? skipauth : false;
 511         tls = has_tls ? tls : false;
 512         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 513             error_setg(errp, "spice failed to add client");
 514             close(fd);
 515         }
 516         return;
 517 #ifdef CONFIG_VNC
 518     } else if (strcmp(protocol, "vnc") == 0) {
 519         skipauth = has_skipauth ? skipauth : false;
 520         vnc_display_add_client(NULL, fd, skipauth);
 521         return;
 522 #endif
 523     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 524         if (qemu_chr_add_client(s, fd) < 0) {
 525             error_setg(errp, "failed to add client");
 526             close(fd);
 527             return;
 528         }
 529         return;
 530     }
 531
 532     error_setg(errp, "protocol '%s' is invalid", protocol);
 533     close(fd);
 534 }
 535
 536 void object_add(const char *type, const char *id, const QDict *qdict,
 537                 Visitor *v, Error **errp)
 538 {
 539     Object *obj;
 540     const QDictEntry *e;
 541     Error *local_err = NULL;
 542
 543     if (!object_class_by_name(type)) {
 544         error_setg(errp, "invalid class name");
 545         return;
 546     }
 547
 548     obj = object_new(type);
 549     if (qdict) {
 550         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 551             object_property_set(obj, v, e->key, &local_err);
 552             if (local_err) {
 553                 goto out;
 554             }
 555         }
 556     }
 557
 558     if (!object_dynamic_cast(obj, TYPE_USER_CREATABLE)) {
 559         error_setg(&local_err, "object '%s' isn't supported by object-add",
 560                    id);
 561         goto out;
 562     }
 563
 564     user_creatable_complete(obj, &local_err);
 565     if (local_err) {
 566         goto out;
 567     }
 568
 569     object_property_add_child(container_get(object_get_root(), "/objects"),
 570                               id, obj, &local_err);
 571 out:
 572     if (local_err) {
 573         error_propagate(errp, local_err);
 574     }
 575     object_unref(obj);
 576 }
 577
 578 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 579 {
 580     const char *type = qdict_get_str(qdict, "qom-type");
 581     const char *id = qdict_get_str(qdict, "id");
 582     QObject *props = qdict_get(qdict, "props");
 583     const QDict *pdict = NULL;
 584     Error *local_err = NULL;
 585     QmpInputVisitor *qiv;
 586
 587     if (props) {
 588         pdict = qobject_to_qdict(props);
 589         if (!pdict) {
 590             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 591             goto out;
 592         }
 593     }
 594
 595     qiv = qmp_input_visitor_new(props);
 596     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 597     qmp_input_visitor_cleanup(qiv);
 598
 599 out:
 600     if (local_err) {
 601         qerror_report_err(local_err);
 602         error_free(local_err);
 603         return -1;
 604     }
 605
 606     return 0;
 607 }
 608
 609 void qmp_object_del(const char *id, Error **errp)
 610 {
 611     Object *container;
 612     Object *obj;
 613
 614     container = container_get(object_get_root(), "/objects");
 615     obj = object_resolve_path_component(container, id);
 616     if (!obj) {
 617         error_setg(errp, "object id not found");
 618         return;
 619     }
 620     object_unparent(obj);
 621 }