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 void qmp_cont(Error **errp)
 150 {
 151     BlockDriverState *bs;
 152
 153     if (runstate_needs_reset()) {
 154         error_setg(errp, "Resetting the Virtual Machine is required");
 155         return;
 156     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 157         return;
 158     }
 159
 160     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 161         bdrv_iostatus_reset(bs);
 162     }
 163     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 164         if (bdrv_key_required(bs)) {
 165             error_set(errp, QERR_DEVICE_ENCRYPTED,
 166                       bdrv_get_device_name(bs),
 167                       bdrv_get_encrypted_filename(bs));
 168             return;
 169         }
 170     }
 171
 172     if (runstate_check(RUN_STATE_INMIGRATE)) {
 173         autostart = 1;
 174     } else {
 175         vm_start();
 176     }
 177 }
 178
 179 void qmp_system_wakeup(Error **errp)
 180 {
 181     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 182 }
 183
 184 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 185 {
 186     Object *obj;
 187     bool ambiguous = false;
 188     ObjectPropertyInfoList *props = NULL;
 189     ObjectProperty *prop;
 190
 191     obj = object_resolve_path(path, &ambiguous);
 192     if (obj == NULL) {
 193         if (ambiguous) {
 194             error_setg(errp, "Path '%s' is ambiguous", path);
 195         } else {
 196             error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 197         }
 198         return NULL;
 199     }
 200
 201     QTAILQ_FOREACH(prop, &obj->properties, node) {
 202         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 203
 204         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 205         entry->next = props;
 206         props = entry;
 207
 208         entry->value->name = g_strdup(prop->name);
 209         entry->value->type = g_strdup(prop->type);
 210     }
 211
 212     return props;
 213 }
 214
 215 /* FIXME: teach qapi about how to pass through Visitors */
 216 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 217 {
 218     const char *path = qdict_get_str(qdict, "path");
 219     const char *property = qdict_get_str(qdict, "property");
 220     QObject *value = qdict_get(qdict, "value");
 221     Error *local_err = NULL;
 222     Object *obj;
 223
 224     obj = object_resolve_path(path, NULL);
 225     if (!obj) {
 226         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 227         goto out;
 228     }
 229
 230     object_property_set_qobject(obj, value, property, &local_err);
 231
 232 out:
 233     if (local_err) {
 234         qerror_report_err(local_err);
 235         error_free(local_err);
 236         return -1;
 237     }
 238
 239     return 0;
 240 }
 241
 242 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 243 {
 244     const char *path = qdict_get_str(qdict, "path");
 245     const char *property = qdict_get_str(qdict, "property");
 246     Error *local_err = NULL;
 247     Object *obj;
 248
 249     obj = object_resolve_path(path, NULL);
 250     if (!obj) {
 251         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 252         goto out;
 253     }
 254
 255     *ret = object_property_get_qobject(obj, property, &local_err);
 256
 257 out:
 258     if (local_err) {
 259         qerror_report_err(local_err);
 260         error_free(local_err);
 261         return -1;
 262     }
 263
 264     return 0;
 265 }
 266
 267 void qmp_set_password(const char *protocol, const char *password,
 268                       bool has_connected, const char *connected, Error **errp)
 269 {
 270     int disconnect_if_connected = 0;
 271     int fail_if_connected = 0;
 272     int rc;
 273
 274     if (has_connected) {
 275         if (strcmp(connected, "fail") == 0) {
 276             fail_if_connected = 1;
 277         } else if (strcmp(connected, "disconnect") == 0) {
 278             disconnect_if_connected = 1;
 279         } else if (strcmp(connected, "keep") == 0) {
 280             /* nothing */
 281         } else {
 282             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 283             return;
 284         }
 285     }
 286
 287     if (strcmp(protocol, "spice") == 0) {
 288         if (!using_spice) {
 289             /* correct one? spice isn't a device ,,, */
 290             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 291             return;
 292         }
 293         rc = qemu_spice_set_passwd(password, fail_if_connected,
 294                                    disconnect_if_connected);
 295         if (rc != 0) {
 296             error_set(errp, QERR_SET_PASSWD_FAILED);
 297         }
 298         return;
 299     }
 300
 301     if (strcmp(protocol, "vnc") == 0) {
 302         if (fail_if_connected || disconnect_if_connected) {
 303             /* vnc supports "connected=keep" only */
 304             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 305             return;
 306         }
 307         /* Note that setting an empty password will not disable login through
 308          * this interface. */
 309         rc = vnc_display_password(NULL, password);
 310         if (rc < 0) {
 311             error_set(errp, QERR_SET_PASSWD_FAILED);
 312         }
 313         return;
 314     }
 315
 316     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 317 }
 318
 319 void qmp_expire_password(const char *protocol, const char *whenstr,
 320                          Error **errp)
 321 {
 322     time_t when;
 323     int rc;
 324
 325     if (strcmp(whenstr, "now") == 0) {
 326         when = 0;
 327     } else if (strcmp(whenstr, "never") == 0) {
 328         when = TIME_MAX;
 329     } else if (whenstr[0] == '+') {
 330         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 331     } else {
 332         when = strtoull(whenstr, NULL, 10);
 333     }
 334
 335     if (strcmp(protocol, "spice") == 0) {
 336         if (!using_spice) {
 337             /* correct one? spice isn't a device ,,, */
 338             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 339             return;
 340         }
 341         rc = qemu_spice_set_pw_expire(when);
 342         if (rc != 0) {
 343             error_set(errp, QERR_SET_PASSWD_FAILED);
 344         }
 345         return;
 346     }
 347
 348     if (strcmp(protocol, "vnc") == 0) {
 349         rc = vnc_display_pw_expire(NULL, when);
 350         if (rc != 0) {
 351             error_set(errp, QERR_SET_PASSWD_FAILED);
 352         }
 353         return;
 354     }
 355
 356     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 357 }
 358
 359 #ifdef CONFIG_VNC
 360 void qmp_change_vnc_password(const char *password, Error **errp)
 361 {
 362     if (vnc_display_password(NULL, password) < 0) {
 363         error_set(errp, QERR_SET_PASSWD_FAILED);
 364     }
 365 }
 366
 367 static void qmp_change_vnc_listen(const char *target, Error **errp)
 368 {
 369     vnc_display_open(NULL, target, errp);
 370 }
 371
 372 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 373                            Error **errp)
 374 {
 375     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 376         if (!has_arg) {
 377             error_set(errp, QERR_MISSING_PARAMETER, "password");
 378         } else {
 379             qmp_change_vnc_password(arg, errp);
 380         }
 381     } else {
 382         qmp_change_vnc_listen(target, errp);
 383     }
 384 }
 385 #else
 386 void qmp_change_vnc_password(const char *password, Error **errp)
 387 {
 388     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 389 }
 390 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 391                            Error **errp)
 392 {
 393     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 394 }
 395 #endif /* !CONFIG_VNC */
 396
 397 void qmp_change(const char *device, const char *target,
 398                 bool has_arg, const char *arg, Error **errp)
 399 {
 400     if (strcmp(device, "vnc") == 0) {
 401         qmp_change_vnc(target, has_arg, arg, errp);
 402     } else {
 403         qmp_change_blockdev(device, target, arg, errp);
 404     }
 405 }
 406
 407 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 408 {
 409     ObjectTypeInfoList *e, **pret = data;
 410     ObjectTypeInfo *info;
 411
 412     info = g_malloc0(sizeof(*info));
 413     info->name = g_strdup(object_class_get_name(klass));
 414
 415     e = g_malloc0(sizeof(*e));
 416     e->value = info;
 417     e->next = *pret;
 418     *pret = e;
 419 }
 420
 421 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 422                                        const char *implements,
 423                                        bool has_abstract,
 424                                        bool abstract,
 425                                        Error **errp)
 426 {
 427     ObjectTypeInfoList *ret = NULL;
 428
 429     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 430
 431     return ret;
 432 }
 433
 434 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 435                                                    Error **errp)
 436 {
 437     ObjectClass *klass;
 438     Property *prop;
 439     DevicePropertyInfoList *prop_list = NULL;
 440
 441     klass = object_class_by_name(typename);
 442     if (klass == NULL) {
 443         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 444         return NULL;
 445     }
 446
 447     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 448     if (klass == NULL) {
 449         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 450                   "name", TYPE_DEVICE);
 451         return NULL;
 452     }
 453
 454     do {
 455         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 456             DevicePropertyInfoList *entry;
 457             DevicePropertyInfo *info;
 458
 459             /*
 460              * TODO Properties without a parser are just for dirty hacks.
 461              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 462              * for removal.  This conditional should be removed along with
 463              * it.
 464              */
 465             if (!prop->info->set) {
 466                 continue;           /* no way to set it, don't show */
 467             }
 468
 469             info = g_malloc0(sizeof(*info));
 470             info->name = g_strdup(prop->name);
 471             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 472
 473             entry = g_malloc0(sizeof(*entry));
 474             entry->value = info;
 475             entry->next = prop_list;
 476             prop_list = entry;
 477         }
 478         klass = object_class_get_parent(klass);
 479     } while (klass != object_class_by_name(TYPE_DEVICE));
 480
 481     return prop_list;
 482 }
 483
 484 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 485 {
 486     return arch_query_cpu_definitions(errp);
 487 }
 488
 489 void qmp_add_client(const char *protocol, const char *fdname,
 490                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 491                     Error **errp)
 492 {
 493     CharDriverState *s;
 494     int fd;
 495
 496     fd = monitor_get_fd(cur_mon, fdname, errp);
 497     if (fd < 0) {
 498         return;
 499     }
 500
 501     if (strcmp(protocol, "spice") == 0) {
 502         if (!using_spice) {
 503             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 504             close(fd);
 505             return;
 506         }
 507         skipauth = has_skipauth ? skipauth : false;
 508         tls = has_tls ? tls : false;
 509         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 510             error_setg(errp, "spice failed to add client");
 511             close(fd);
 512         }
 513         return;
 514 #ifdef CONFIG_VNC
 515     } else if (strcmp(protocol, "vnc") == 0) {
 516         skipauth = has_skipauth ? skipauth : false;
 517         vnc_display_add_client(NULL, fd, skipauth);
 518         return;
 519 #endif
 520     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 521         if (qemu_chr_add_client(s, fd) < 0) {
 522             error_setg(errp, "failed to add client");
 523             close(fd);
 524             return;
 525         }
 526         return;
 527     }
 528
 529     error_setg(errp, "protocol '%s' is invalid", protocol);
 530     close(fd);
 531 }
 532
 533 void object_add(const char *type, const char *id, const QDict *qdict,
 534                 Visitor *v, Error **errp)
 535 {
 536     Object *obj;
 537     ObjectClass *klass;
 538     const QDictEntry *e;
 539     Error *local_err = NULL;
 540
 541     klass = object_class_by_name(type);
 542     if (!klass) {
 543         error_setg(errp, "invalid object type: %s", type);
 544         return;
 545     }
 546
 547     if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
 548         error_setg(errp, "object type '%s' isn't supported by object-add",
 549                    type);
 550         return;
 551     }
 552
 553     if (object_class_is_abstract(klass)) {
 554         error_setg(errp, "object type '%s' is abstract", type);
 555         return;
 556     }
 557
 558     obj = object_new(type);
 559     if (qdict) {
 560         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 561             object_property_set(obj, v, e->key, &local_err);
 562             if (local_err) {
 563                 goto out;
 564             }
 565         }
 566     }
 567
 568     object_property_add_child(container_get(object_get_root(), "/objects"),
 569                               id, obj, &local_err);
 570     if (local_err) {
 571         goto out;
 572     }
 573
 574     user_creatable_complete(obj, &local_err);
 575     if (local_err) {
 576         object_property_del(container_get(object_get_root(), "/objects"),
 577                             id, &error_abort);
 578         goto out;
 579     }
 580 out:
 581     if (local_err) {
 582         error_propagate(errp, local_err);
 583     }
 584     object_unref(obj);
 585 }
 586
 587 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 588 {
 589     const char *type = qdict_get_str(qdict, "qom-type");
 590     const char *id = qdict_get_str(qdict, "id");
 591     QObject *props = qdict_get(qdict, "props");
 592     const QDict *pdict = NULL;
 593     Error *local_err = NULL;
 594     QmpInputVisitor *qiv;
 595
 596     if (props) {
 597         pdict = qobject_to_qdict(props);
 598         if (!pdict) {
 599             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 600             goto out;
 601         }
 602     }
 603
 604     qiv = qmp_input_visitor_new(props);
 605     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 606     qmp_input_visitor_cleanup(qiv);
 607
 608 out:
 609     if (local_err) {
 610         qerror_report_err(local_err);
 611         error_free(local_err);
 612         return -1;
 613     }
 614
 615     return 0;
 616 }
 617
 618 void qmp_object_del(const char *id, Error **errp)
 619 {
 620     Object *container;
 621     Object *obj;
 622
 623     container = container_get(object_get_root(), "/objects");
 624     obj = object_resolve_path_component(container, id);
 625     if (!obj) {
 626         error_setg(errp, "object id not found");
 627         return;
 628     }
 629     object_unparent(obj);
 630 }