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
  31 NameInfo *qmp_query_name(Error **errp)
  32 {
  33     NameInfo *info = g_malloc0(sizeof(*info));
  34
  35     if (qemu_name) {
  36         info->has_name = true;
  37         info->name = g_strdup(qemu_name);
  38     }
  39
  40     return info;
  41 }
  42
  43 VersionInfo *qmp_query_version(Error **err)
  44 {
  45     VersionInfo *info = g_malloc0(sizeof(*info));
  46     const char *version = QEMU_VERSION;
  47     char *tmp;
  48
  49     info->qemu.major = strtol(version, &tmp, 10);
  50     tmp++;
  51     info->qemu.minor = strtol(tmp, &tmp, 10);
  52     tmp++;
  53     info->qemu.micro = strtol(tmp, &tmp, 10);
  54     info->package = g_strdup(QEMU_PKGVERSION);
  55
  56     return info;
  57 }
  58
  59 KvmInfo *qmp_query_kvm(Error **errp)
  60 {
  61     KvmInfo *info = g_malloc0(sizeof(*info));
  62
  63     info->enabled = kvm_enabled();
  64     info->present = kvm_available();
  65
  66     return info;
  67 }
  68
  69 UuidInfo *qmp_query_uuid(Error **errp)
  70 {
  71     UuidInfo *info = g_malloc0(sizeof(*info));
  72     char uuid[64];
  73
  74     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  75                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  76                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  77                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  78                    qemu_uuid[14], qemu_uuid[15]);
  79
  80     info->UUID = g_strdup(uuid);
  81     return info;
  82 }
  83
  84 void qmp_quit(Error **err)
  85 {
  86     no_shutdown = 0;
  87     qemu_system_shutdown_request();
  88 }
  89
  90 void qmp_stop(Error **errp)
  91 {
  92     if (runstate_check(RUN_STATE_INMIGRATE)) {
  93         autostart = 0;
  94     } else {
  95         vm_stop(RUN_STATE_PAUSED);
  96     }
  97 }
  98
  99 void qmp_system_reset(Error **errp)
 100 {
 101     qemu_system_reset_request();
 102 }
 103
 104 void qmp_system_powerdown(Error **erp)
 105 {
 106     qemu_system_powerdown_request();
 107 }
 108
 109 void qmp_cpu(int64_t index, Error **errp)
 110 {
 111     /* Just do nothing */
 112 }
 113
 114 void qmp_cpu_add(int64_t id, Error **errp)
 115 {
 116     if (current_machine->hot_add_cpu) {
 117         current_machine->hot_add_cpu(id, errp);
 118     } else {
 119         error_setg(errp, "Not supported");
 120     }
 121 }
 122
 123 #ifndef CONFIG_VNC
 124 /* If VNC support is enabled, the "true" query-vnc command is
 125    defined in the VNC subsystem */
 126 VncInfo *qmp_query_vnc(Error **errp)
 127 {
 128     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 129     return NULL;
 130 };
 131 #endif
 132
 133 #ifndef CONFIG_SPICE
 134 /* If SPICE support is enabled, the "true" query-spice command is
 135    defined in the SPICE subsystem. Also note that we use a small
 136    trick to maintain query-spice's original behavior, which is not
 137    to be available in the namespace if SPICE is not compiled in */
 138 SpiceInfo *qmp_query_spice(Error **errp)
 139 {
 140     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 141     return NULL;
 142 };
 143 #endif
 144
 145 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 146 {
 147     bdrv_iostatus_reset(bs);
 148 }
 149
 150 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 151 {
 152     Error **err = opaque;
 153
 154     if (!error_is_set(err) && bdrv_key_required(bs)) {
 155         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
 156                   bdrv_get_encrypted_filename(bs));
 157     }
 158 }
 159
 160 void qmp_cont(Error **errp)
 161 {
 162     Error *local_err = NULL;
 163
 164     if (runstate_needs_reset()) {
 165         error_set(errp, QERR_RESET_REQUIRED);
 166         return;
 167     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 168         return;
 169     }
 170
 171     bdrv_iterate(iostatus_bdrv_it, NULL);
 172     bdrv_iterate(encrypted_bdrv_it, &local_err);
 173     if (local_err) {
 174         error_propagate(errp, local_err);
 175         return;
 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         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 200         return NULL;
 201     }
 202
 203     QTAILQ_FOREACH(prop, &obj->properties, node) {
 204         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 205
 206         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 207         entry->next = props;
 208         props = entry;
 209
 210         entry->value->name = g_strdup(prop->name);
 211         entry->value->type = g_strdup(prop->type);
 212     }
 213
 214     return props;
 215 }
 216
 217 /* FIXME: teach qapi about how to pass through Visitors */
 218 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 219 {
 220     const char *path = qdict_get_str(qdict, "path");
 221     const char *property = qdict_get_str(qdict, "property");
 222     QObject *value = qdict_get(qdict, "value");
 223     Error *local_err = NULL;
 224     Object *obj;
 225
 226     obj = object_resolve_path(path, NULL);
 227     if (!obj) {
 228         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 229         goto out;
 230     }
 231
 232     object_property_set_qobject(obj, value, property, &local_err);
 233
 234 out:
 235     if (local_err) {
 236         qerror_report_err(local_err);
 237         error_free(local_err);
 238         return -1;
 239     }
 240
 241     return 0;
 242 }
 243
 244 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 245 {
 246     const char *path = qdict_get_str(qdict, "path");
 247     const char *property = qdict_get_str(qdict, "property");
 248     Error *local_err = NULL;
 249     Object *obj;
 250
 251     obj = object_resolve_path(path, NULL);
 252     if (!obj) {
 253         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 254         goto out;
 255     }
 256
 257     *ret = object_property_get_qobject(obj, property, &local_err);
 258
 259 out:
 260     if (local_err) {
 261         qerror_report_err(local_err);
 262         error_free(local_err);
 263         return -1;
 264     }
 265
 266     return 0;
 267 }
 268
 269 void qmp_set_password(const char *protocol, const char *password,
 270                       bool has_connected, const char *connected, Error **errp)
 271 {
 272     int disconnect_if_connected = 0;
 273     int fail_if_connected = 0;
 274     int rc;
 275
 276     if (has_connected) {
 277         if (strcmp(connected, "fail") == 0) {
 278             fail_if_connected = 1;
 279         } else if (strcmp(connected, "disconnect") == 0) {
 280             disconnect_if_connected = 1;
 281         } else if (strcmp(connected, "keep") == 0) {
 282             /* nothing */
 283         } else {
 284             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 285             return;
 286         }
 287     }
 288
 289     if (strcmp(protocol, "spice") == 0) {
 290         if (!using_spice) {
 291             /* correct one? spice isn't a device ,,, */
 292             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 293             return;
 294         }
 295         rc = qemu_spice_set_passwd(password, fail_if_connected,
 296                                    disconnect_if_connected);
 297         if (rc != 0) {
 298             error_set(errp, QERR_SET_PASSWD_FAILED);
 299         }
 300         return;
 301     }
 302
 303     if (strcmp(protocol, "vnc") == 0) {
 304         if (fail_if_connected || disconnect_if_connected) {
 305             /* vnc supports "connected=keep" only */
 306             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 307             return;
 308         }
 309         /* Note that setting an empty password will not disable login through
 310          * this interface. */
 311         rc = vnc_display_password(NULL, password);
 312         if (rc < 0) {
 313             error_set(errp, QERR_SET_PASSWD_FAILED);
 314         }
 315         return;
 316     }
 317
 318     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 319 }
 320
 321 void qmp_expire_password(const char *protocol, const char *whenstr,
 322                          Error **errp)
 323 {
 324     time_t when;
 325     int rc;
 326
 327     if (strcmp(whenstr, "now") == 0) {
 328         when = 0;
 329     } else if (strcmp(whenstr, "never") == 0) {
 330         when = TIME_MAX;
 331     } else if (whenstr[0] == '+') {
 332         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 333     } else {
 334         when = strtoull(whenstr, NULL, 10);
 335     }
 336
 337     if (strcmp(protocol, "spice") == 0) {
 338         if (!using_spice) {
 339             /* correct one? spice isn't a device ,,, */
 340             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 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     vnc_display_open(NULL, target, errp);
 372 }
 373
 374 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 375                            Error **errp)
 376 {
 377     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 378         if (!has_arg) {
 379             error_set(errp, QERR_MISSING_PARAMETER, "password");
 380         } else {
 381             qmp_change_vnc_password(arg, errp);
 382         }
 383     } else {
 384         qmp_change_vnc_listen(target, errp);
 385     }
 386 }
 387 #else
 388 void qmp_change_vnc_password(const char *password, Error **errp)
 389 {
 390     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 391 }
 392 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 393                            Error **errp)
 394 {
 395     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 396 }
 397 #endif /* !CONFIG_VNC */
 398
 399 void qmp_change(const char *device, const char *target,
 400                 bool has_arg, const char *arg, Error **err)
 401 {
 402     if (strcmp(device, "vnc") == 0) {
 403         qmp_change_vnc(target, has_arg, arg, err);
 404     } else {
 405         qmp_change_blockdev(device, target, arg, err);
 406     }
 407 }
 408
 409 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 410 {
 411     ObjectTypeInfoList *e, **pret = data;
 412     ObjectTypeInfo *info;
 413
 414     info = g_malloc0(sizeof(*info));
 415     info->name = g_strdup(object_class_get_name(klass));
 416
 417     e = g_malloc0(sizeof(*e));
 418     e->value = info;
 419     e->next = *pret;
 420     *pret = e;
 421 }
 422
 423 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 424                                        const char *implements,
 425                                        bool has_abstract,
 426                                        bool abstract,
 427                                        Error **errp)
 428 {
 429     ObjectTypeInfoList *ret = NULL;
 430
 431     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 432
 433     return ret;
 434 }
 435
 436 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 437                                                    Error **errp)
 438 {
 439     ObjectClass *klass;
 440     Property *prop;
 441     DevicePropertyInfoList *prop_list = NULL;
 442
 443     klass = object_class_by_name(typename);
 444     if (klass == NULL) {
 445         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 446         return NULL;
 447     }
 448
 449     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 450     if (klass == NULL) {
 451         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 452                   "name", TYPE_DEVICE);
 453         return NULL;
 454     }
 455
 456     do {
 457         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 458             DevicePropertyInfoList *entry;
 459             DevicePropertyInfo *info;
 460
 461             /*
 462              * TODO Properties without a parser are just for dirty hacks.
 463              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 464              * for removal.  This conditional should be removed along with
 465              * it.
 466              */
 467             if (!prop->info->set) {
 468                 continue;           /* no way to set it, don't show */
 469             }
 470
 471             info = g_malloc0(sizeof(*info));
 472             info->name = g_strdup(prop->name);
 473             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 474
 475             entry = g_malloc0(sizeof(*entry));
 476             entry->value = info;
 477             entry->next = prop_list;
 478             prop_list = entry;
 479         }
 480         klass = object_class_get_parent(klass);
 481     } while (klass != object_class_by_name(TYPE_DEVICE));
 482
 483     return prop_list;
 484 }
 485
 486 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 487 {
 488     return arch_query_cpu_definitions(errp);
 489 }
 490
 491 void qmp_add_client(const char *protocol, const char *fdname,
 492                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 493                     Error **errp)
 494 {
 495     CharDriverState *s;
 496     int fd;
 497
 498     fd = monitor_get_fd(cur_mon, fdname, errp);
 499     if (fd < 0) {
 500         return;
 501     }
 502
 503     if (strcmp(protocol, "spice") == 0) {
 504         if (!using_spice) {
 505             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 506             close(fd);
 507             return;
 508         }
 509         skipauth = has_skipauth ? skipauth : false;
 510         tls = has_tls ? tls : false;
 511         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 512             error_setg(errp, "spice failed to add client");
 513             close(fd);
 514         }
 515         return;
 516 #ifdef CONFIG_VNC
 517     } else if (strcmp(protocol, "vnc") == 0) {
 518         skipauth = has_skipauth ? skipauth : false;
 519         vnc_display_add_client(NULL, fd, skipauth);
 520         return;
 521 #endif
 522     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 523         if (qemu_chr_add_client(s, fd) < 0) {
 524             error_setg(errp, "failed to add client");
 525             close(fd);
 526             return;
 527         }
 528         return;
 529     }
 530
 531     error_setg(errp, "protocol '%s' is invalid", protocol);
 532     close(fd);
 533 }
 534
 535 void object_add(const char *type, const char *id, const QDict *qdict,
 536                 Visitor *v, Error **errp)
 537 {
 538     Object *obj;
 539     const QDictEntry *e;
 540     Error *local_err = NULL;
 541
 542     if (!object_class_by_name(type)) {
 543         error_setg(errp, "invalid class name");
 544         return;
 545     }
 546
 547     obj = object_new(type);
 548     if (qdict) {
 549         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 550             object_property_set(obj, v, e->key, &local_err);
 551             if (local_err) {
 552                 error_propagate(errp, local_err);
 553                 object_unref(obj);
 554                 return;
 555             }
 556         }
 557     }
 558
 559     object_property_add_child(container_get(object_get_root(), "/objects"),
 560                               id, obj, errp);
 561     object_unref(obj);
 562 }
 563
 564 int qmp_object_add(Monitor *mon, const QDict *qdict, QObject **ret)
 565 {
 566     const char *type = qdict_get_str(qdict, "qom-type");
 567     const char *id = qdict_get_str(qdict, "id");
 568     QObject *props = qdict_get(qdict, "props");
 569     const QDict *pdict = NULL;
 570     Error *local_err = NULL;
 571     QmpInputVisitor *qiv;
 572
 573     if (props) {
 574         pdict = qobject_to_qdict(props);
 575         if (!pdict) {
 576             error_set(&local_err, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 577             goto out;
 578         }
 579     }
 580
 581     qiv = qmp_input_visitor_new(props);
 582     object_add(type, id, pdict, qmp_input_get_visitor(qiv), &local_err);
 583     qmp_input_visitor_cleanup(qiv);
 584
 585 out:
 586     if (local_err) {
 587         qerror_report_err(local_err);
 588         error_free(local_err);
 589         return -1;
 590     }
 591
 592     return 0;
 593 }
 594
 595 void qmp_object_del(const char *id, Error **errp)
 596 {
 597     Object *container;
 598     Object *obj;
 599
 600     container = container_get(object_get_root(), "/objects");
 601     obj = object_resolve_path_component(container, id);
 602     if (!obj) {
 603         error_setg(errp, "object id not found");
 604         return;
 605     }
 606     object_unparent(obj);
 607 }