qom/object.c

   1 /*
   2  * QEMU Object Model
   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 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/qdev-core.h"
  15 #include "qapi/error.h"
  16 #include "qom/object.h"
  17 #include "qom/object_interfaces.h"
  18 #include "qemu/cutils.h"
  19 #include "qapi/visitor.h"
  20 #include "qapi/string-input-visitor.h"
  21 #include "qapi/string-output-visitor.h"
  22 #include "qapi/qobject-input-visitor.h"
  23 #include "qapi/qapi-builtin-visit.h"
  24 #include "qapi/qmp/qerror.h"
  25 #include "qapi/qmp/qjson.h"
  26 #include "trace.h"
  27
  28 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  29  * of the QOM core on QObject?  */
  30 #include "qom/qom-qobject.h"
  31 #include "qapi/qmp/qbool.h"
  32 #include "qapi/qmp/qnum.h"
  33 #include "qapi/qmp/qstring.h"
  34 #include "qemu/error-report.h"
  35
  36 #define MAX_INTERFACES 32
  37
  38 typedef struct InterfaceImpl InterfaceImpl;
  39 typedef struct TypeImpl TypeImpl;
  40
  41 struct InterfaceImpl
  42 {
  43     const char *typename;
  44 };
  45
  46 struct TypeImpl
  47 {
  48     const char *name;
  49
  50     size_t class_size;
  51
  52     size_t instance_size;
  53
  54     void (*class_init)(ObjectClass *klass, void *data);
  55     void (*class_base_init)(ObjectClass *klass, void *data);
  56
  57     void *class_data;
  58
  59     void (*instance_init)(Object *obj);
  60     void (*instance_post_init)(Object *obj);
  61     void (*instance_finalize)(Object *obj);
  62
  63     bool abstract;
  64
  65     const char *parent;
  66     TypeImpl *parent_type;
  67
  68     ObjectClass *class;
  69
  70     int num_interfaces;
  71     InterfaceImpl interfaces[MAX_INTERFACES];
  72 };
  73
  74 static Type type_interface;
  75
  76 static GHashTable *type_table_get(void)
  77 {
  78     static GHashTable *type_table;
  79
  80     if (type_table == NULL) {
  81         type_table = g_hash_table_new(g_str_hash, g_str_equal);
  82     }
  83
  84     return type_table;
  85 }
  86
  87 static bool enumerating_types;
  88
  89 static void type_table_add(TypeImpl *ti)
  90 {
  91     assert(!enumerating_types);
  92     g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
  93 }
  94
  95 static TypeImpl *type_table_lookup(const char *name)
  96 {
  97     return g_hash_table_lookup(type_table_get(), name);
  98 }
  99
 100 static TypeImpl *type_new(const TypeInfo *info)
 101 {
 102     TypeImpl *ti = g_malloc0(sizeof(*ti));
 103     int i;
 104
 105     g_assert(info->name != NULL);
 106
 107     if (type_table_lookup(info->name) != NULL) {
 108         fprintf(stderr, "Registering `%s' which already exists\n", info->name);
 109         abort();
 110     }
 111
 112     ti->name = g_strdup(info->name);
 113     ti->parent = g_strdup(info->parent);
 114
 115     ti->class_size = info->class_size;
 116     ti->instance_size = info->instance_size;
 117
 118     ti->class_init = info->class_init;
 119     ti->class_base_init = info->class_base_init;
 120     ti->class_data = info->class_data;
 121
 122     ti->instance_init = info->instance_init;
 123     ti->instance_post_init = info->instance_post_init;
 124     ti->instance_finalize = info->instance_finalize;
 125
 126     ti->abstract = info->abstract;
 127
 128     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 129         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 130     }
 131     ti->num_interfaces = i;
 132
 133     return ti;
 134 }
 135
 136 static TypeImpl *type_register_internal(const TypeInfo *info)
 137 {
 138     TypeImpl *ti;
 139     ti = type_new(info);
 140
 141     type_table_add(ti);
 142     return ti;
 143 }
 144
 145 TypeImpl *type_register(const TypeInfo *info)
 146 {
 147     assert(info->parent);
 148     return type_register_internal(info);
 149 }
 150
 151 TypeImpl *type_register_static(const TypeInfo *info)
 152 {
 153     return type_register(info);
 154 }
 155
 156 void type_register_static_array(const TypeInfo *infos, int nr_infos)
 157 {
 158     int i;
 159
 160     for (i = 0; i < nr_infos; i++) {
 161         type_register_static(&infos[i]);
 162     }
 163 }
 164
 165 static TypeImpl *type_get_by_name(const char *name)
 166 {
 167     if (name == NULL) {
 168         return NULL;
 169     }
 170
 171     return type_table_lookup(name);
 172 }
 173
 174 static TypeImpl *type_get_parent(TypeImpl *type)
 175 {
 176     if (!type->parent_type && type->parent) {
 177         type->parent_type = type_get_by_name(type->parent);
 178         if (!type->parent_type) {
 179             fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
 180                     type->name, type->parent);
 181             abort();
 182         }
 183     }
 184
 185     return type->parent_type;
 186 }
 187
 188 static bool type_has_parent(TypeImpl *type)
 189 {
 190     return (type->parent != NULL);
 191 }
 192
 193 static size_t type_class_get_size(TypeImpl *ti)
 194 {
 195     if (ti->class_size) {
 196         return ti->class_size;
 197     }
 198
 199     if (type_has_parent(ti)) {
 200         return type_class_get_size(type_get_parent(ti));
 201     }
 202
 203     return sizeof(ObjectClass);
 204 }
 205
 206 static size_t type_object_get_size(TypeImpl *ti)
 207 {
 208     if (ti->instance_size) {
 209         return ti->instance_size;
 210     }
 211
 212     if (type_has_parent(ti)) {
 213         return type_object_get_size(type_get_parent(ti));
 214     }
 215
 216     return 0;
 217 }
 218
 219 size_t object_type_get_instance_size(const char *typename)
 220 {
 221     TypeImpl *type = type_get_by_name(typename);
 222
 223     g_assert(type != NULL);
 224     return type_object_get_size(type);
 225 }
 226
 227 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 228 {
 229     assert(target_type);
 230
 231     /* Check if target_type is a direct ancestor of type */
 232     while (type) {
 233         if (type == target_type) {
 234             return true;
 235         }
 236
 237         type = type_get_parent(type);
 238     }
 239
 240     return false;
 241 }
 242
 243 static void type_initialize(TypeImpl *ti);
 244
 245 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 246                                       TypeImpl *parent_type)
 247 {
 248     InterfaceClass *new_iface;
 249     TypeInfo info = { };
 250     TypeImpl *iface_impl;
 251
 252     info.parent = parent_type->name;
 253     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 254     info.abstract = true;
 255
 256     iface_impl = type_new(&info);
 257     iface_impl->parent_type = parent_type;
 258     type_initialize(iface_impl);
 259     g_free((char *)info.name);
 260
 261     new_iface = (InterfaceClass *)iface_impl->class;
 262     new_iface->concrete_class = ti->class;
 263     new_iface->interface_type = interface_type;
 264
 265     ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface);
 266 }
 267
 268 static void object_property_free(gpointer data)
 269 {
 270     ObjectProperty *prop = data;
 271
 272     if (prop->defval) {
 273         qobject_unref(prop->defval);
 274         prop->defval = NULL;
 275     }
 276     g_free(prop->name);
 277     g_free(prop->type);
 278     g_free(prop->description);
 279     g_free(prop);
 280 }
 281
 282 static void type_initialize(TypeImpl *ti)
 283 {
 284     TypeImpl *parent;
 285
 286     if (ti->class) {
 287         return;
 288     }
 289
 290     ti->class_size = type_class_get_size(ti);
 291     ti->instance_size = type_object_get_size(ti);
 292     /* Any type with zero instance_size is implicitly abstract.
 293      * This means interface types are all abstract.
 294      */
 295     if (ti->instance_size == 0) {
 296         ti->abstract = true;
 297     }
 298     if (type_is_ancestor(ti, type_interface)) {
 299         assert(ti->instance_size == 0);
 300         assert(ti->abstract);
 301         assert(!ti->instance_init);
 302         assert(!ti->instance_post_init);
 303         assert(!ti->instance_finalize);
 304         assert(!ti->num_interfaces);
 305     }
 306     ti->class = g_malloc0(ti->class_size);
 307
 308     parent = type_get_parent(ti);
 309     if (parent) {
 310         type_initialize(parent);
 311         GSList *e;
 312         int i;
 313
 314         g_assert(parent->class_size <= ti->class_size);
 315         g_assert(parent->instance_size <= ti->instance_size);
 316         memcpy(ti->class, parent->class, parent->class_size);
 317         ti->class->interfaces = NULL;
 318
 319         for (e = parent->class->interfaces; e; e = e->next) {
 320             InterfaceClass *iface = e->data;
 321             ObjectClass *klass = OBJECT_CLASS(iface);
 322
 323             type_initialize_interface(ti, iface->interface_type, klass->type);
 324         }
 325
 326         for (i = 0; i < ti->num_interfaces; i++) {
 327             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 328             if (!t) {
 329                 error_report("missing interface '%s' for object '%s'",
 330                              ti->interfaces[i].typename, parent->name);
 331                 abort();
 332             }
 333             for (e = ti->class->interfaces; e; e = e->next) {
 334                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 335
 336                 if (type_is_ancestor(target_type, t)) {
 337                     break;
 338                 }
 339             }
 340
 341             if (e) {
 342                 continue;
 343             }
 344
 345             type_initialize_interface(ti, t, t);
 346         }
 347     }
 348
 349     ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
 350                                                   object_property_free);
 351
 352     ti->class->type = ti;
 353
 354     while (parent) {
 355         if (parent->class_base_init) {
 356             parent->class_base_init(ti->class, ti->class_data);
 357         }
 358         parent = type_get_parent(parent);
 359     }
 360
 361     if (ti->class_init) {
 362         ti->class_init(ti->class, ti->class_data);
 363     }
 364 }
 365
 366 static void object_init_with_type(Object *obj, TypeImpl *ti)
 367 {
 368     if (type_has_parent(ti)) {
 369         object_init_with_type(obj, type_get_parent(ti));
 370     }
 371
 372     if (ti->instance_init) {
 373         ti->instance_init(obj);
 374     }
 375 }
 376
 377 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 378 {
 379     if (ti->instance_post_init) {
 380         ti->instance_post_init(obj);
 381     }
 382
 383     if (type_has_parent(ti)) {
 384         object_post_init_with_type(obj, type_get_parent(ti));
 385     }
 386 }
 387
 388 void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp)
 389 {
 390     int i;
 391
 392     if (!props) {
 393         return;
 394     }
 395
 396     for (i = 0; i < props->len; i++) {
 397         GlobalProperty *p = g_ptr_array_index(props, i);
 398         Error *err = NULL;
 399
 400         if (object_dynamic_cast(obj, p->driver) == NULL) {
 401             continue;
 402         }
 403         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 404             continue;
 405         }
 406         p->used = true;
 407         object_property_parse(obj, p->value, p->property, &err);
 408         if (err != NULL) {
 409             error_prepend(&err, "can't apply global %s.%s=%s: ",
 410                           p->driver, p->property, p->value);
 411             /*
 412              * If errp != NULL, propagate error and return.
 413              * If errp == NULL, report a warning, but keep going
 414              * with the remaining globals.
 415              */
 416             if (errp) {
 417                 error_propagate(errp, err);
 418                 return;
 419             } else {
 420                 warn_report_err(err);
 421             }
 422         }
 423     }
 424 }
 425
 426 /*
 427  * Global property defaults
 428  * Slot 0: accelerator's global property defaults
 429  * Slot 1: machine's global property defaults
 430  * Slot 2: global properties from legacy command line option
 431  * Each is a GPtrArray of of GlobalProperty.
 432  * Applied in order, later entries override earlier ones.
 433  */
 434 static GPtrArray *object_compat_props[3];
 435
 436 /*
 437  * Retrieve @GPtrArray for global property defined with options
 438  * other than "-global".  These are generally used for syntactic
 439  * sugar and legacy command line options.
 440  */
 441 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 442 {
 443     GlobalProperty *g;
 444     if (!object_compat_props[2]) {
 445         object_compat_props[2] = g_ptr_array_new();
 446     }
 447     g = g_new0(GlobalProperty, 1);
 448     g->driver = g_strdup(driver);
 449     g->property = g_strdup(prop);
 450     g->value = g_strdup(value);
 451     g_ptr_array_add(object_compat_props[2], g);
 452 }
 453
 454 /*
 455  * Set machine's global property defaults to @compat_props.
 456  * May be called at most once.
 457  */
 458 void object_set_machine_compat_props(GPtrArray *compat_props)
 459 {
 460     assert(!object_compat_props[1]);
 461     object_compat_props[1] = compat_props;
 462 }
 463
 464 /*
 465  * Set accelerator's global property defaults to @compat_props.
 466  * May be called at most once.
 467  */
 468 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 469 {
 470     assert(!object_compat_props[0]);
 471     object_compat_props[0] = compat_props;
 472 }
 473
 474 void object_apply_compat_props(Object *obj)
 475 {
 476     int i;
 477
 478     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 479         object_apply_global_props(obj, object_compat_props[i],
 480                                   i == 2 ? &error_fatal : &error_abort);
 481     }
 482 }
 483
 484 static void object_class_property_init_all(Object *obj)
 485 {
 486     ObjectPropertyIterator iter;
 487     ObjectProperty *prop;
 488
 489     object_class_property_iter_init(&iter, object_get_class(obj));
 490     while ((prop = object_property_iter_next(&iter))) {
 491         if (prop->init) {
 492             prop->init(obj, prop);
 493         }
 494     }
 495 }
 496
 497 static void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 498 {
 499     Object *obj = data;
 500
 501     type_initialize(type);
 502
 503     g_assert(type->instance_size >= sizeof(Object));
 504     g_assert(type->abstract == false);
 505     g_assert(size >= type->instance_size);
 506
 507     memset(obj, 0, type->instance_size);
 508     obj->class = type->class;
 509     object_ref(obj);
 510     object_class_property_init_all(obj);
 511     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 512                                             NULL, object_property_free);
 513     object_init_with_type(obj, type);
 514     object_post_init_with_type(obj, type);
 515 }
 516
 517 void object_initialize(void *data, size_t size, const char *typename)
 518 {
 519     TypeImpl *type = type_get_by_name(typename);
 520
 521     if (!type) {
 522         error_report("missing object type '%s'", typename);
 523         abort();
 524     }
 525
 526     object_initialize_with_type(data, size, type);
 527 }
 528
 529 void object_initialize_child(Object *parentobj, const char *propname,
 530                              void *childobj, size_t size, const char *type,
 531                              Error **errp, ...)
 532 {
 533     va_list vargs;
 534
 535     va_start(vargs, errp);
 536     object_initialize_childv(parentobj, propname, childobj, size, type, errp,
 537                              vargs);
 538     va_end(vargs);
 539 }
 540
 541 void object_initialize_childv(Object *parentobj, const char *propname,
 542                               void *childobj, size_t size, const char *type,
 543                               Error **errp, va_list vargs)
 544 {
 545     Error *local_err = NULL;
 546     Object *obj;
 547     UserCreatable *uc;
 548
 549     object_initialize(childobj, size, type);
 550     obj = OBJECT(childobj);
 551
 552     object_set_propv(obj, &local_err, vargs);
 553     if (local_err) {
 554         goto out;
 555     }
 556
 557     object_property_add_child(parentobj, propname, obj);
 558
 559     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 560     if (uc) {
 561         user_creatable_complete(uc, &local_err);
 562         if (local_err) {
 563             object_unparent(obj);
 564             goto out;
 565         }
 566     }
 567
 568 out:
 569     /*
 570      * We want @obj's reference to be 1 on success, 0 on failure.
 571      * On success, it's 2: one taken by object_initialize(), and one
 572      * by object_property_add_child().
 573      * On failure in object_initialize() or earlier, it's 1.
 574      * On failure afterwards, it's also 1: object_unparent() releases
 575      * the reference taken by object_property_add_child().
 576      */
 577     object_unref(obj);
 578
 579     error_propagate(errp, local_err);
 580 }
 581
 582 static inline bool object_property_is_child(ObjectProperty *prop)
 583 {
 584     return strstart(prop->type, "child<", NULL);
 585 }
 586
 587 static void object_property_del_all(Object *obj)
 588 {
 589     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 590     ObjectProperty *prop;
 591     ObjectPropertyIterator iter;
 592     bool released;
 593
 594     do {
 595         released = false;
 596         object_property_iter_init(&iter, obj);
 597         while ((prop = object_property_iter_next(&iter)) != NULL) {
 598             if (g_hash_table_add(done, prop)) {
 599                 if (prop->release) {
 600                     prop->release(obj, prop->name, prop->opaque);
 601                     released = true;
 602                     break;
 603                 }
 604             }
 605         }
 606     } while (released);
 607
 608     g_hash_table_unref(obj->properties);
 609 }
 610
 611 static void object_property_del_child(Object *obj, Object *child)
 612 {
 613     ObjectProperty *prop;
 614     GHashTableIter iter;
 615     gpointer key, value;
 616
 617     g_hash_table_iter_init(&iter, obj->properties);
 618     while (g_hash_table_iter_next(&iter, &key, &value)) {
 619         prop = value;
 620         if (object_property_is_child(prop) && prop->opaque == child) {
 621             if (prop->release) {
 622                 prop->release(obj, prop->name, prop->opaque);
 623                 prop->release = NULL;
 624             }
 625             break;
 626         }
 627     }
 628     g_hash_table_iter_init(&iter, obj->properties);
 629     while (g_hash_table_iter_next(&iter, &key, &value)) {
 630         prop = value;
 631         if (object_property_is_child(prop) && prop->opaque == child) {
 632             g_hash_table_iter_remove(&iter);
 633             break;
 634         }
 635     }
 636 }
 637
 638 void object_unparent(Object *obj)
 639 {
 640     if (obj->parent) {
 641         object_property_del_child(obj->parent, obj);
 642     }
 643 }
 644
 645 static void object_deinit(Object *obj, TypeImpl *type)
 646 {
 647     if (type->instance_finalize) {
 648         type->instance_finalize(obj);
 649     }
 650
 651     if (type_has_parent(type)) {
 652         object_deinit(obj, type_get_parent(type));
 653     }
 654 }
 655
 656 static void object_finalize(void *data)
 657 {
 658     Object *obj = data;
 659     TypeImpl *ti = obj->class->type;
 660
 661     object_property_del_all(obj);
 662     object_deinit(obj, ti);
 663
 664     g_assert(obj->ref == 0);
 665     if (obj->free) {
 666         obj->free(obj);
 667     }
 668 }
 669
 670 static Object *object_new_with_type(Type type)
 671 {
 672     Object *obj;
 673
 674     g_assert(type != NULL);
 675     type_initialize(type);
 676
 677     obj = g_malloc(type->instance_size);
 678     object_initialize_with_type(obj, type->instance_size, type);
 679     obj->free = g_free;
 680
 681     return obj;
 682 }
 683
 684 Object *object_new_with_class(ObjectClass *klass)
 685 {
 686     return object_new_with_type(klass->type);
 687 }
 688
 689 Object *object_new(const char *typename)
 690 {
 691     TypeImpl *ti = type_get_by_name(typename);
 692
 693     return object_new_with_type(ti);
 694 }
 695
 696
 697 Object *object_new_with_props(const char *typename,
 698                               Object *parent,
 699                               const char *id,
 700                               Error **errp,
 701                               ...)
 702 {
 703     va_list vargs;
 704     Object *obj;
 705
 706     va_start(vargs, errp);
 707     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 708     va_end(vargs);
 709
 710     return obj;
 711 }
 712
 713
 714 Object *object_new_with_propv(const char *typename,
 715                               Object *parent,
 716                               const char *id,
 717                               Error **errp,
 718                               va_list vargs)
 719 {
 720     Object *obj;
 721     ObjectClass *klass;
 722     Error *local_err = NULL;
 723     UserCreatable *uc;
 724
 725     klass = object_class_by_name(typename);
 726     if (!klass) {
 727         error_setg(errp, "invalid object type: %s", typename);
 728         return NULL;
 729     }
 730
 731     if (object_class_is_abstract(klass)) {
 732         error_setg(errp, "object type '%s' is abstract", typename);
 733         return NULL;
 734     }
 735     obj = object_new_with_type(klass->type);
 736
 737     if (object_set_propv(obj, &local_err, vargs) < 0) {
 738         goto error;
 739     }
 740
 741     if (id != NULL) {
 742         object_property_add_child(parent, id, obj);
 743     }
 744
 745     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 746     if (uc) {
 747         user_creatable_complete(uc, &local_err);
 748         if (local_err) {
 749             if (id != NULL) {
 750                 object_unparent(obj);
 751             }
 752             goto error;
 753         }
 754     }
 755
 756     object_unref(obj);
 757     return obj;
 758
 759  error:
 760     error_propagate(errp, local_err);
 761     object_unref(obj);
 762     return NULL;
 763 }
 764
 765
 766 int object_set_props(Object *obj,
 767                      Error **errp,
 768                      ...)
 769 {
 770     va_list vargs;
 771     int ret;
 772
 773     va_start(vargs, errp);
 774     ret = object_set_propv(obj, errp, vargs);
 775     va_end(vargs);
 776
 777     return ret;
 778 }
 779
 780
 781 int object_set_propv(Object *obj,
 782                      Error **errp,
 783                      va_list vargs)
 784 {
 785     const char *propname;
 786     Error *local_err = NULL;
 787
 788     propname = va_arg(vargs, char *);
 789     while (propname != NULL) {
 790         const char *value = va_arg(vargs, char *);
 791
 792         g_assert(value != NULL);
 793         object_property_parse(obj, value, propname, &local_err);
 794         if (local_err) {
 795             error_propagate(errp, local_err);
 796             return -1;
 797         }
 798         propname = va_arg(vargs, char *);
 799     }
 800
 801     return 0;
 802 }
 803
 804
 805 Object *object_dynamic_cast(Object *obj, const char *typename)
 806 {
 807     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 808         return obj;
 809     }
 810
 811     return NULL;
 812 }
 813
 814 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 815                                    const char *file, int line, const char *func)
 816 {
 817     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 818                                      typename, file, line, func);
 819
 820 #ifdef CONFIG_QOM_CAST_DEBUG
 821     int i;
 822     Object *inst;
 823
 824     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 825         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 826             goto out;
 827         }
 828     }
 829
 830     inst = object_dynamic_cast(obj, typename);
 831
 832     if (!inst && obj) {
 833         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 834                 file, line, func, obj, typename);
 835         abort();
 836     }
 837
 838     assert(obj == inst);
 839
 840     if (obj && obj == inst) {
 841         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 842             atomic_set(&obj->class->object_cast_cache[i - 1],
 843                        atomic_read(&obj->class->object_cast_cache[i]));
 844         }
 845         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 846     }
 847
 848 out:
 849 #endif
 850     return obj;
 851 }
 852
 853 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 854                                        const char *typename)
 855 {
 856     ObjectClass *ret = NULL;
 857     TypeImpl *target_type;
 858     TypeImpl *type;
 859
 860     if (!class) {
 861         return NULL;
 862     }
 863
 864     /* A simple fast path that can trigger a lot for leaf classes.  */
 865     type = class->type;
 866     if (type->name == typename) {
 867         return class;
 868     }
 869
 870     target_type = type_get_by_name(typename);
 871     if (!target_type) {
 872         /* target class type unknown, so fail the cast */
 873         return NULL;
 874     }
 875
 876     if (type->class->interfaces &&
 877             type_is_ancestor(target_type, type_interface)) {
 878         int found = 0;
 879         GSList *i;
 880
 881         for (i = class->interfaces; i; i = i->next) {
 882             ObjectClass *target_class = i->data;
 883
 884             if (type_is_ancestor(target_class->type, target_type)) {
 885                 ret = target_class;
 886                 found++;
 887             }
 888          }
 889
 890         /* The match was ambiguous, don't allow a cast */
 891         if (found > 1) {
 892             ret = NULL;
 893         }
 894     } else if (type_is_ancestor(type, target_type)) {
 895         ret = class;
 896     }
 897
 898     return ret;
 899 }
 900
 901 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 902                                               const char *typename,
 903                                               const char *file, int line,
 904                                               const char *func)
 905 {
 906     ObjectClass *ret;
 907
 908     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 909                                            typename, file, line, func);
 910
 911 #ifdef CONFIG_QOM_CAST_DEBUG
 912     int i;
 913
 914     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 915         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 916             ret = class;
 917             goto out;
 918         }
 919     }
 920 #else
 921     if (!class || !class->interfaces) {
 922         return class;
 923     }
 924 #endif
 925
 926     ret = object_class_dynamic_cast(class, typename);
 927     if (!ret && class) {
 928         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 929                 file, line, func, class, typename);
 930         abort();
 931     }
 932
 933 #ifdef CONFIG_QOM_CAST_DEBUG
 934     if (class && ret == class) {
 935         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 936             atomic_set(&class->class_cast_cache[i - 1],
 937                        atomic_read(&class->class_cast_cache[i]));
 938         }
 939         atomic_set(&class->class_cast_cache[i - 1], typename);
 940     }
 941 out:
 942 #endif
 943     return ret;
 944 }
 945
 946 const char *object_get_typename(const Object *obj)
 947 {
 948     return obj->class->type->name;
 949 }
 950
 951 ObjectClass *object_get_class(Object *obj)
 952 {
 953     return obj->class;
 954 }
 955
 956 bool object_class_is_abstract(ObjectClass *klass)
 957 {
 958     return klass->type->abstract;
 959 }
 960
 961 const char *object_class_get_name(ObjectClass *klass)
 962 {
 963     return klass->type->name;
 964 }
 965
 966 ObjectClass *object_class_by_name(const char *typename)
 967 {
 968     TypeImpl *type = type_get_by_name(typename);
 969
 970     if (!type) {
 971         return NULL;
 972     }
 973
 974     type_initialize(type);
 975
 976     return type->class;
 977 }
 978
 979 ObjectClass *object_class_get_parent(ObjectClass *class)
 980 {
 981     TypeImpl *type = type_get_parent(class->type);
 982
 983     if (!type) {
 984         return NULL;
 985     }
 986
 987     type_initialize(type);
 988
 989     return type->class;
 990 }
 991
 992 typedef struct OCFData
 993 {
 994     void (*fn)(ObjectClass *klass, void *opaque);
 995     const char *implements_type;
 996     bool include_abstract;
 997     void *opaque;
 998 } OCFData;
 999
1000 static void object_class_foreach_tramp(gpointer key, gpointer value,
1001                                        gpointer opaque)
1002 {
1003     OCFData *data = opaque;
1004     TypeImpl *type = value;
1005     ObjectClass *k;
1006
1007     type_initialize(type);
1008     k = type->class;
1009
1010     if (!data->include_abstract && type->abstract) {
1011         return;
1012     }
1013
1014     if (data->implements_type &&
1015         !object_class_dynamic_cast(k, data->implements_type)) {
1016         return;
1017     }
1018
1019     data->fn(k, data->opaque);
1020 }
1021
1022 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1023                           const char *implements_type, bool include_abstract,
1024                           void *opaque)
1025 {
1026     OCFData data = { fn, implements_type, include_abstract, opaque };
1027
1028     enumerating_types = true;
1029     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1030     enumerating_types = false;
1031 }
1032
1033 static int do_object_child_foreach(Object *obj,
1034                                    int (*fn)(Object *child, void *opaque),
1035                                    void *opaque, bool recurse)
1036 {
1037     GHashTableIter iter;
1038     ObjectProperty *prop;
1039     int ret = 0;
1040
1041     g_hash_table_iter_init(&iter, obj->properties);
1042     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1043         if (object_property_is_child(prop)) {
1044             Object *child = prop->opaque;
1045
1046             ret = fn(child, opaque);
1047             if (ret != 0) {
1048                 break;
1049             }
1050             if (recurse) {
1051                 ret = do_object_child_foreach(child, fn, opaque, true);
1052                 if (ret != 0) {
1053                     break;
1054                 }
1055             }
1056         }
1057     }
1058     return ret;
1059 }
1060
1061 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1062                          void *opaque)
1063 {
1064     return do_object_child_foreach(obj, fn, opaque, false);
1065 }
1066
1067 int object_child_foreach_recursive(Object *obj,
1068                                    int (*fn)(Object *child, void *opaque),
1069                                    void *opaque)
1070 {
1071     return do_object_child_foreach(obj, fn, opaque, true);
1072 }
1073
1074 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1075 {
1076     GSList **list = opaque;
1077
1078     *list = g_slist_prepend(*list, klass);
1079 }
1080
1081 GSList *object_class_get_list(const char *implements_type,
1082                               bool include_abstract)
1083 {
1084     GSList *list = NULL;
1085
1086     object_class_foreach(object_class_get_list_tramp,
1087                          implements_type, include_abstract, &list);
1088     return list;
1089 }
1090
1091 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1092 {
1093     return strcasecmp(object_class_get_name((ObjectClass *)a),
1094                       object_class_get_name((ObjectClass *)b));
1095 }
1096
1097 GSList *object_class_get_list_sorted(const char *implements_type,
1098                                      bool include_abstract)
1099 {
1100     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1101                         object_class_cmp);
1102 }
1103
1104 Object *object_ref(Object *obj)
1105 {
1106     if (!obj) {
1107         return NULL;
1108     }
1109     atomic_inc(&obj->ref);
1110     return obj;
1111 }
1112
1113 void object_unref(Object *obj)
1114 {
1115     if (!obj) {
1116         return;
1117     }
1118     g_assert(obj->ref > 0);
1119
1120     /* parent always holds a reference to its children */
1121     if (atomic_fetch_dec(&obj->ref) == 1) {
1122         object_finalize(obj);
1123     }
1124 }
1125
1126 static ObjectProperty *
1127 object_property_try_add(Object *obj, const char *name, const char *type,
1128                         ObjectPropertyAccessor *get,
1129                         ObjectPropertyAccessor *set,
1130                         ObjectPropertyRelease *release,
1131                         void *opaque, Error **errp)
1132 {
1133     ObjectProperty *prop;
1134     size_t name_len = strlen(name);
1135
1136     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1137         int i;
1138         ObjectProperty *ret;
1139         char *name_no_array = g_strdup(name);
1140
1141         name_no_array[name_len - 3] = '\0';
1142         for (i = 0; ; ++i) {
1143             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1144
1145             ret = object_property_try_add(obj, full_name, type, get, set,
1146                                           release, opaque, NULL);
1147             g_free(full_name);
1148             if (ret) {
1149                 break;
1150             }
1151         }
1152         g_free(name_no_array);
1153         return ret;
1154     }
1155
1156     if (object_property_find(obj, name, NULL) != NULL) {
1157         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1158                    name, object_get_typename(obj));
1159         return NULL;
1160     }
1161
1162     prop = g_malloc0(sizeof(*prop));
1163
1164     prop->name = g_strdup(name);
1165     prop->type = g_strdup(type);
1166
1167     prop->get = get;
1168     prop->set = set;
1169     prop->release = release;
1170     prop->opaque = opaque;
1171
1172     g_hash_table_insert(obj->properties, prop->name, prop);
1173     return prop;
1174 }
1175
1176 ObjectProperty *
1177 object_property_add(Object *obj, const char *name, const char *type,
1178                     ObjectPropertyAccessor *get,
1179                     ObjectPropertyAccessor *set,
1180                     ObjectPropertyRelease *release,
1181                     void *opaque)
1182 {
1183     return object_property_try_add(obj, name, type, get, set, release,
1184                                    opaque, &error_abort);
1185 }
1186
1187 ObjectProperty *
1188 object_class_property_add(ObjectClass *klass,
1189                           const char *name,
1190                           const char *type,
1191                           ObjectPropertyAccessor *get,
1192                           ObjectPropertyAccessor *set,
1193                           ObjectPropertyRelease *release,
1194                           void *opaque)
1195 {
1196     ObjectProperty *prop;
1197
1198     assert(!object_class_property_find(klass, name, NULL));
1199
1200     prop = g_malloc0(sizeof(*prop));
1201
1202     prop->name = g_strdup(name);
1203     prop->type = g_strdup(type);
1204
1205     prop->get = get;
1206     prop->set = set;
1207     prop->release = release;
1208     prop->opaque = opaque;
1209
1210     g_hash_table_insert(klass->properties, prop->name, prop);
1211
1212     return prop;
1213 }
1214
1215 ObjectProperty *object_property_find(Object *obj, const char *name,
1216                                      Error **errp)
1217 {
1218     ObjectProperty *prop;
1219     ObjectClass *klass = object_get_class(obj);
1220
1221     prop = object_class_property_find(klass, name, NULL);
1222     if (prop) {
1223         return prop;
1224     }
1225
1226     prop = g_hash_table_lookup(obj->properties, name);
1227     if (prop) {
1228         return prop;
1229     }
1230
1231     error_setg(errp, "Property '.%s' not found", name);
1232     return NULL;
1233 }
1234
1235 void object_property_iter_init(ObjectPropertyIterator *iter,
1236                                Object *obj)
1237 {
1238     g_hash_table_iter_init(&iter->iter, obj->properties);
1239     iter->nextclass = object_get_class(obj);
1240 }
1241
1242 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1243 {
1244     gpointer key, val;
1245     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1246         if (!iter->nextclass) {
1247             return NULL;
1248         }
1249         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1250         iter->nextclass = object_class_get_parent(iter->nextclass);
1251     }
1252     return val;
1253 }
1254
1255 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1256                                      ObjectClass *klass)
1257 {
1258     g_hash_table_iter_init(&iter->iter, klass->properties);
1259     iter->nextclass = object_class_get_parent(klass);
1260 }
1261
1262 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1263                                            Error **errp)
1264 {
1265     ObjectProperty *prop;
1266     ObjectClass *parent_klass;
1267
1268     parent_klass = object_class_get_parent(klass);
1269     if (parent_klass) {
1270         prop = object_class_property_find(parent_klass, name, NULL);
1271         if (prop) {
1272             return prop;
1273         }
1274     }
1275
1276     prop = g_hash_table_lookup(klass->properties, name);
1277     if (!prop) {
1278         error_setg(errp, "Property '.%s' not found", name);
1279     }
1280     return prop;
1281 }
1282
1283 void object_property_del(Object *obj, const char *name)
1284 {
1285     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1286
1287     if (prop->release) {
1288         prop->release(obj, name, prop->opaque);
1289     }
1290     g_hash_table_remove(obj->properties, name);
1291 }
1292
1293 void object_property_get(Object *obj, Visitor *v, const char *name,
1294                          Error **errp)
1295 {
1296     ObjectProperty *prop = object_property_find(obj, name, errp);
1297     if (prop == NULL) {
1298         return;
1299     }
1300
1301     if (!prop->get) {
1302         error_setg(errp, QERR_PERMISSION_DENIED);
1303     } else {
1304         prop->get(obj, v, name, prop->opaque, errp);
1305     }
1306 }
1307
1308 void object_property_set(Object *obj, Visitor *v, const char *name,
1309                          Error **errp)
1310 {
1311     ObjectProperty *prop = object_property_find(obj, name, errp);
1312     if (prop == NULL) {
1313         return;
1314     }
1315
1316     if (!prop->set) {
1317         error_setg(errp, QERR_PERMISSION_DENIED);
1318     } else {
1319         prop->set(obj, v, name, prop->opaque, errp);
1320     }
1321 }
1322
1323 void object_property_set_str(Object *obj, const char *value,
1324                              const char *name, Error **errp)
1325 {
1326     QString *qstr = qstring_from_str(value);
1327     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1328
1329     qobject_unref(qstr);
1330 }
1331
1332 char *object_property_get_str(Object *obj, const char *name,
1333                               Error **errp)
1334 {
1335     QObject *ret = object_property_get_qobject(obj, name, errp);
1336     char *retval;
1337
1338     if (!ret) {
1339         return NULL;
1340     }
1341
1342     retval = g_strdup(qobject_get_try_str(ret));
1343     if (!retval) {
1344         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1345     }
1346
1347     qobject_unref(ret);
1348     return retval;
1349 }
1350
1351 void object_property_set_link(Object *obj, Object *value,
1352                               const char *name, Error **errp)
1353 {
1354     if (value) {
1355         char *path = object_get_canonical_path(value);
1356         object_property_set_str(obj, path, name, errp);
1357         g_free(path);
1358     } else {
1359         object_property_set_str(obj, "", name, errp);
1360     }
1361 }
1362
1363 Object *object_property_get_link(Object *obj, const char *name,
1364                                  Error **errp)
1365 {
1366     char *str = object_property_get_str(obj, name, errp);
1367     Object *target = NULL;
1368
1369     if (str && *str) {
1370         target = object_resolve_path(str, NULL);
1371         if (!target) {
1372             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1373                       "Device '%s' not found", str);
1374         }
1375     }
1376
1377     g_free(str);
1378     return target;
1379 }
1380
1381 void object_property_set_bool(Object *obj, bool value,
1382                               const char *name, Error **errp)
1383 {
1384     QBool *qbool = qbool_from_bool(value);
1385     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1386
1387     qobject_unref(qbool);
1388 }
1389
1390 bool object_property_get_bool(Object *obj, const char *name,
1391                               Error **errp)
1392 {
1393     QObject *ret = object_property_get_qobject(obj, name, errp);
1394     QBool *qbool;
1395     bool retval;
1396
1397     if (!ret) {
1398         return false;
1399     }
1400     qbool = qobject_to(QBool, ret);
1401     if (!qbool) {
1402         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1403         retval = false;
1404     } else {
1405         retval = qbool_get_bool(qbool);
1406     }
1407
1408     qobject_unref(ret);
1409     return retval;
1410 }
1411
1412 void object_property_set_int(Object *obj, int64_t value,
1413                              const char *name, Error **errp)
1414 {
1415     QNum *qnum = qnum_from_int(value);
1416     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1417
1418     qobject_unref(qnum);
1419 }
1420
1421 int64_t object_property_get_int(Object *obj, const char *name,
1422                                 Error **errp)
1423 {
1424     QObject *ret = object_property_get_qobject(obj, name, errp);
1425     QNum *qnum;
1426     int64_t retval;
1427
1428     if (!ret) {
1429         return -1;
1430     }
1431
1432     qnum = qobject_to(QNum, ret);
1433     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1434         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1435         retval = -1;
1436     }
1437
1438     qobject_unref(ret);
1439     return retval;
1440 }
1441
1442 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1443 {
1444     Visitor *v = qobject_input_visitor_new(prop->defval);
1445
1446     assert(prop->set != NULL);
1447     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1448
1449     visit_free(v);
1450 }
1451
1452 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1453 {
1454     assert(!prop->defval);
1455     assert(!prop->init);
1456
1457     prop->defval = defval;
1458     prop->init = object_property_init_defval;
1459 }
1460
1461 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1462 {
1463     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1464 }
1465
1466 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1467 {
1468     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1469 }
1470
1471 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1472 {
1473     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1474 }
1475
1476 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1477 {
1478     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1479 }
1480
1481 void object_property_set_uint(Object *obj, uint64_t value,
1482                               const char *name, Error **errp)
1483 {
1484     QNum *qnum = qnum_from_uint(value);
1485
1486     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1487     qobject_unref(qnum);
1488 }
1489
1490 uint64_t object_property_get_uint(Object *obj, const char *name,
1491                                   Error **errp)
1492 {
1493     QObject *ret = object_property_get_qobject(obj, name, errp);
1494     QNum *qnum;
1495     uint64_t retval;
1496
1497     if (!ret) {
1498         return 0;
1499     }
1500     qnum = qobject_to(QNum, ret);
1501     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1502         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1503         retval = 0;
1504     }
1505
1506     qobject_unref(ret);
1507     return retval;
1508 }
1509
1510 typedef struct EnumProperty {
1511     const QEnumLookup *lookup;
1512     int (*get)(Object *, Error **);
1513     void (*set)(Object *, int, Error **);
1514 } EnumProperty;
1515
1516 int object_property_get_enum(Object *obj, const char *name,
1517                              const char *typename, Error **errp)
1518 {
1519     char *str;
1520     int ret;
1521     ObjectProperty *prop = object_property_find(obj, name, errp);
1522     EnumProperty *enumprop;
1523
1524     if (prop == NULL) {
1525         return 0;
1526     }
1527
1528     if (!g_str_equal(prop->type, typename)) {
1529         error_setg(errp, "Property %s on %s is not '%s' enum type",
1530                    name, object_class_get_name(
1531                        object_get_class(obj)), typename);
1532         return 0;
1533     }
1534
1535     enumprop = prop->opaque;
1536
1537     str = object_property_get_str(obj, name, errp);
1538     if (!str) {
1539         return 0;
1540     }
1541
1542     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1543     g_free(str);
1544
1545     return ret;
1546 }
1547
1548 void object_property_parse(Object *obj, const char *string,
1549                            const char *name, Error **errp)
1550 {
1551     Visitor *v = string_input_visitor_new(string);
1552     object_property_set(obj, v, name, errp);
1553     visit_free(v);
1554 }
1555
1556 char *object_property_print(Object *obj, const char *name, bool human,
1557                             Error **errp)
1558 {
1559     Visitor *v;
1560     char *string = NULL;
1561     Error *local_err = NULL;
1562
1563     v = string_output_visitor_new(human, &string);
1564     object_property_get(obj, v, name, &local_err);
1565     if (local_err) {
1566         error_propagate(errp, local_err);
1567         goto out;
1568     }
1569
1570     visit_complete(v, &string);
1571
1572 out:
1573     visit_free(v);
1574     return string;
1575 }
1576
1577 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1578 {
1579     ObjectProperty *prop = object_property_find(obj, name, errp);
1580     if (prop == NULL) {
1581         return NULL;
1582     }
1583
1584     return prop->type;
1585 }
1586
1587 Object *object_get_root(void)
1588 {
1589     static Object *root;
1590
1591     if (!root) {
1592         root = object_new("container");
1593     }
1594
1595     return root;
1596 }
1597
1598 Object *object_get_objects_root(void)
1599 {
1600     return container_get(object_get_root(), "/objects");
1601 }
1602
1603 Object *object_get_internal_root(void)
1604 {
1605     static Object *internal_root;
1606
1607     if (!internal_root) {
1608         internal_root = object_new("container");
1609     }
1610
1611     return internal_root;
1612 }
1613
1614 static void object_get_child_property(Object *obj, Visitor *v,
1615                                       const char *name, void *opaque,
1616                                       Error **errp)
1617 {
1618     Object *child = opaque;
1619     char *path;
1620
1621     path = object_get_canonical_path(child);
1622     visit_type_str(v, name, &path, errp);
1623     g_free(path);
1624 }
1625
1626 static Object *object_resolve_child_property(Object *parent, void *opaque,
1627                                              const char *part)
1628 {
1629     return opaque;
1630 }
1631
1632 static void object_finalize_child_property(Object *obj, const char *name,
1633                                            void *opaque)
1634 {
1635     Object *child = opaque;
1636
1637     if (child->class->unparent) {
1638         (child->class->unparent)(child);
1639     }
1640     child->parent = NULL;
1641     object_unref(child);
1642 }
1643
1644 ObjectProperty *
1645 object_property_add_child(Object *obj, const char *name,
1646                           Object *child)
1647 {
1648     g_autofree char *type = NULL;
1649     ObjectProperty *op;
1650
1651     assert(!child->parent);
1652
1653     type = g_strdup_printf("child<%s>", object_get_typename(child));
1654
1655     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1656                              object_finalize_child_property, child);
1657     op->resolve = object_resolve_child_property;
1658     object_ref(child);
1659     child->parent = obj;
1660     return op;
1661 }
1662
1663 void object_property_allow_set_link(const Object *obj, const char *name,
1664                                     Object *val, Error **errp)
1665 {
1666     /* Allow the link to be set, always */
1667 }
1668
1669 typedef struct {
1670     union {
1671         Object **targetp;
1672         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1673         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1674     };
1675     void (*check)(const Object *, const char *, Object *, Error **);
1676     ObjectPropertyLinkFlags flags;
1677 } LinkProperty;
1678
1679 static Object **
1680 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1681 {
1682     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1683         return &lprop->target;
1684     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1685         return (void *)obj + lprop->offset;
1686     } else {
1687         return lprop->targetp;
1688     }
1689 }
1690
1691 static void object_get_link_property(Object *obj, Visitor *v,
1692                                      const char *name, void *opaque,
1693                                      Error **errp)
1694 {
1695     LinkProperty *lprop = opaque;
1696     Object **targetp = object_link_get_targetp(obj, lprop);
1697     char *path;
1698
1699     if (*targetp) {
1700         path = object_get_canonical_path(*targetp);
1701         visit_type_str(v, name, &path, errp);
1702         g_free(path);
1703     } else {
1704         path = (char *)"";
1705         visit_type_str(v, name, &path, errp);
1706     }
1707 }
1708
1709 /*
1710  * object_resolve_link:
1711  *
1712  * Lookup an object and ensure its type matches the link property type.  This
1713  * is similar to object_resolve_path() except type verification against the
1714  * link property is performed.
1715  *
1716  * Returns: The matched object or NULL on path lookup failures.
1717  */
1718 static Object *object_resolve_link(Object *obj, const char *name,
1719                                    const char *path, Error **errp)
1720 {
1721     const char *type;
1722     char *target_type;
1723     bool ambiguous = false;
1724     Object *target;
1725
1726     /* Go from link<FOO> to FOO.  */
1727     type = object_property_get_type(obj, name, NULL);
1728     target_type = g_strndup(&type[5], strlen(type) - 6);
1729     target = object_resolve_path_type(path, target_type, &ambiguous);
1730
1731     if (ambiguous) {
1732         error_setg(errp, "Path '%s' does not uniquely identify an object",
1733                    path);
1734     } else if (!target) {
1735         target = object_resolve_path(path, &ambiguous);
1736         if (target || ambiguous) {
1737             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1738         } else {
1739             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1740                       "Device '%s' not found", path);
1741         }
1742         target = NULL;
1743     }
1744     g_free(target_type);
1745
1746     return target;
1747 }
1748
1749 static void object_set_link_property(Object *obj, Visitor *v,
1750                                      const char *name, void *opaque,
1751                                      Error **errp)
1752 {
1753     Error *local_err = NULL;
1754     LinkProperty *prop = opaque;
1755     Object **targetp = object_link_get_targetp(obj, prop);
1756     Object *old_target = *targetp;
1757     Object *new_target = NULL;
1758     char *path = NULL;
1759
1760     visit_type_str(v, name, &path, &local_err);
1761
1762     if (!local_err && strcmp(path, "") != 0) {
1763         new_target = object_resolve_link(obj, name, path, &local_err);
1764     }
1765
1766     g_free(path);
1767     if (local_err) {
1768         error_propagate(errp, local_err);
1769         return;
1770     }
1771
1772     prop->check(obj, name, new_target, &local_err);
1773     if (local_err) {
1774         error_propagate(errp, local_err);
1775         return;
1776     }
1777
1778     *targetp = new_target;
1779     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1780         object_ref(new_target);
1781         object_unref(old_target);
1782     }
1783 }
1784
1785 static Object *object_resolve_link_property(Object *parent, void *opaque,
1786                                             const char *part)
1787 {
1788     LinkProperty *lprop = opaque;
1789
1790     return *object_link_get_targetp(parent, lprop);
1791 }
1792
1793 static void object_release_link_property(Object *obj, const char *name,
1794                                          void *opaque)
1795 {
1796     LinkProperty *prop = opaque;
1797     Object **targetp = object_link_get_targetp(obj, prop);
1798
1799     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1800         object_unref(*targetp);
1801     }
1802     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1803         g_free(prop);
1804     }
1805 }
1806
1807 static ObjectProperty *
1808 object_add_link_prop(Object *obj, const char *name,
1809                      const char *type, void *ptr,
1810                      void (*check)(const Object *, const char *,
1811                                    Object *, Error **),
1812                      ObjectPropertyLinkFlags flags)
1813 {
1814     LinkProperty *prop = g_malloc(sizeof(*prop));
1815     g_autofree char *full_type = NULL;
1816     ObjectProperty *op;
1817
1818     if (flags & OBJ_PROP_LINK_DIRECT) {
1819         prop->target = ptr;
1820     } else {
1821         prop->targetp = ptr;
1822     }
1823     prop->check = check;
1824     prop->flags = flags;
1825
1826     full_type = g_strdup_printf("link<%s>", type);
1827
1828     op = object_property_add(obj, name, full_type,
1829                              object_get_link_property,
1830                              check ? object_set_link_property : NULL,
1831                              object_release_link_property,
1832                              prop);
1833     op->resolve = object_resolve_link_property;
1834     return op;
1835 }
1836
1837 ObjectProperty *
1838 object_property_add_link(Object *obj, const char *name,
1839                          const char *type, Object **targetp,
1840                          void (*check)(const Object *, const char *,
1841                                        Object *, Error **),
1842                          ObjectPropertyLinkFlags flags)
1843 {
1844     return object_add_link_prop(obj, name, type, targetp, check, flags);
1845 }
1846
1847 ObjectProperty *
1848 object_class_property_add_link(ObjectClass *oc,
1849     const char *name,
1850     const char *type, ptrdiff_t offset,
1851     void (*check)(const Object *obj, const char *name,
1852                   Object *val, Error **errp),
1853     ObjectPropertyLinkFlags flags)
1854 {
1855     LinkProperty *prop = g_new0(LinkProperty, 1);
1856     char *full_type;
1857     ObjectProperty *op;
1858
1859     prop->offset = offset;
1860     prop->check = check;
1861     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1862
1863     full_type = g_strdup_printf("link<%s>", type);
1864
1865     op = object_class_property_add(oc, name, full_type,
1866                                    object_get_link_property,
1867                                    check ? object_set_link_property : NULL,
1868                                    object_release_link_property,
1869                                    prop);
1870
1871     op->resolve = object_resolve_link_property;
1872
1873     g_free(full_type);
1874     return op;
1875 }
1876
1877 ObjectProperty *
1878 object_property_add_const_link(Object *obj, const char *name,
1879                                Object *target)
1880 {
1881     return object_add_link_prop(obj, name,
1882                                 object_get_typename(target), target,
1883                                 NULL, OBJ_PROP_LINK_DIRECT);
1884 }
1885
1886 char *object_get_canonical_path_component(Object *obj)
1887 {
1888     ObjectProperty *prop = NULL;
1889     GHashTableIter iter;
1890
1891     if (obj->parent == NULL) {
1892         return NULL;
1893     }
1894
1895     g_hash_table_iter_init(&iter, obj->parent->properties);
1896     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1897         if (!object_property_is_child(prop)) {
1898             continue;
1899         }
1900
1901         if (prop->opaque == obj) {
1902             return g_strdup(prop->name);
1903         }
1904     }
1905
1906     /* obj had a parent but was not a child, should never happen */
1907     g_assert_not_reached();
1908     return NULL;
1909 }
1910
1911 char *object_get_canonical_path(Object *obj)
1912 {
1913     Object *root = object_get_root();
1914     char *newpath, *path = NULL;
1915
1916     if (obj == root) {
1917         return g_strdup("/");
1918     }
1919
1920     do {
1921         char *component = object_get_canonical_path_component(obj);
1922
1923         if (!component) {
1924             /* A canonical path must be complete, so discard what was
1925              * collected so far.
1926              */
1927             g_free(path);
1928             return NULL;
1929         }
1930
1931         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1932         g_free(path);
1933         g_free(component);
1934         path = newpath;
1935         obj = obj->parent;
1936     } while (obj != root);
1937
1938     return path;
1939 }
1940
1941 Object *object_resolve_path_component(Object *parent, const char *part)
1942 {
1943     ObjectProperty *prop = object_property_find(parent, part, NULL);
1944     if (prop == NULL) {
1945         return NULL;
1946     }
1947
1948     if (prop->resolve) {
1949         return prop->resolve(parent, prop->opaque, part);
1950     } else {
1951         return NULL;
1952     }
1953 }
1954
1955 static Object *object_resolve_abs_path(Object *parent,
1956                                           char **parts,
1957                                           const char *typename)
1958 {
1959     Object *child;
1960
1961     if (*parts == NULL) {
1962         return object_dynamic_cast(parent, typename);
1963     }
1964
1965     if (strcmp(*parts, "") == 0) {
1966         return object_resolve_abs_path(parent, parts + 1, typename);
1967     }
1968
1969     child = object_resolve_path_component(parent, *parts);
1970     if (!child) {
1971         return NULL;
1972     }
1973
1974     return object_resolve_abs_path(child, parts + 1, typename);
1975 }
1976
1977 static Object *object_resolve_partial_path(Object *parent,
1978                                            char **parts,
1979                                            const char *typename,
1980                                            bool *ambiguous)
1981 {
1982     Object *obj;
1983     GHashTableIter iter;
1984     ObjectProperty *prop;
1985
1986     obj = object_resolve_abs_path(parent, parts, typename);
1987
1988     g_hash_table_iter_init(&iter, parent->properties);
1989     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1990         Object *found;
1991
1992         if (!object_property_is_child(prop)) {
1993             continue;
1994         }
1995
1996         found = object_resolve_partial_path(prop->opaque, parts,
1997                                             typename, ambiguous);
1998         if (found) {
1999             if (obj) {
2000                 *ambiguous = true;
2001                 return NULL;
2002             }
2003             obj = found;
2004         }
2005
2006         if (*ambiguous) {
2007             return NULL;
2008         }
2009     }
2010
2011     return obj;
2012 }
2013
2014 Object *object_resolve_path_type(const char *path, const char *typename,
2015                                  bool *ambiguousp)
2016 {
2017     Object *obj;
2018     char **parts;
2019
2020     parts = g_strsplit(path, "/", 0);
2021     assert(parts);
2022
2023     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2024         bool ambiguous = false;
2025         obj = object_resolve_partial_path(object_get_root(), parts,
2026                                           typename, &ambiguous);
2027         if (ambiguousp) {
2028             *ambiguousp = ambiguous;
2029         }
2030     } else {
2031         obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2032     }
2033
2034     g_strfreev(parts);
2035
2036     return obj;
2037 }
2038
2039 Object *object_resolve_path(const char *path, bool *ambiguous)
2040 {
2041     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2042 }
2043
2044 typedef struct StringProperty
2045 {
2046     char *(*get)(Object *, Error **);
2047     void (*set)(Object *, const char *, Error **);
2048 } StringProperty;
2049
2050 static void property_get_str(Object *obj, Visitor *v, const char *name,
2051                              void *opaque, Error **errp)
2052 {
2053     StringProperty *prop = opaque;
2054     char *value;
2055     Error *err = NULL;
2056
2057     value = prop->get(obj, &err);
2058     if (err) {
2059         error_propagate(errp, err);
2060         return;
2061     }
2062
2063     visit_type_str(v, name, &value, errp);
2064     g_free(value);
2065 }
2066
2067 static void property_set_str(Object *obj, Visitor *v, const char *name,
2068                              void *opaque, Error **errp)
2069 {
2070     StringProperty *prop = opaque;
2071     char *value;
2072     Error *local_err = NULL;
2073
2074     visit_type_str(v, name, &value, &local_err);
2075     if (local_err) {
2076         error_propagate(errp, local_err);
2077         return;
2078     }
2079
2080     prop->set(obj, value, errp);
2081     g_free(value);
2082 }
2083
2084 static void property_release_str(Object *obj, const char *name,
2085                                  void *opaque)
2086 {
2087     StringProperty *prop = opaque;
2088     g_free(prop);
2089 }
2090
2091 ObjectProperty *
2092 object_property_add_str(Object *obj, const char *name,
2093                         char *(*get)(Object *, Error **),
2094                         void (*set)(Object *, const char *, Error **))
2095 {
2096     StringProperty *prop = g_malloc0(sizeof(*prop));
2097
2098     prop->get = get;
2099     prop->set = set;
2100
2101     return object_property_add(obj, name, "string",
2102                                get ? property_get_str : NULL,
2103                                set ? property_set_str : NULL,
2104                                property_release_str,
2105                                prop);
2106 }
2107
2108 ObjectProperty *
2109 object_class_property_add_str(ObjectClass *klass, const char *name,
2110                                    char *(*get)(Object *, Error **),
2111                                    void (*set)(Object *, const char *,
2112                                                Error **))
2113 {
2114     StringProperty *prop = g_malloc0(sizeof(*prop));
2115
2116     prop->get = get;
2117     prop->set = set;
2118
2119     return object_class_property_add(klass, name, "string",
2120                                      get ? property_get_str : NULL,
2121                                      set ? property_set_str : NULL,
2122                                      NULL,
2123                                      prop);
2124 }
2125
2126 typedef struct BoolProperty
2127 {
2128     bool (*get)(Object *, Error **);
2129     void (*set)(Object *, bool, Error **);
2130 } BoolProperty;
2131
2132 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2133                               void *opaque, Error **errp)
2134 {
2135     BoolProperty *prop = opaque;
2136     bool value;
2137     Error *err = NULL;
2138
2139     value = prop->get(obj, &err);
2140     if (err) {
2141         error_propagate(errp, err);
2142         return;
2143     }
2144
2145     visit_type_bool(v, name, &value, errp);
2146 }
2147
2148 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2149                               void *opaque, Error **errp)
2150 {
2151     BoolProperty *prop = opaque;
2152     bool value;
2153     Error *local_err = NULL;
2154
2155     visit_type_bool(v, name, &value, &local_err);
2156     if (local_err) {
2157         error_propagate(errp, local_err);
2158         return;
2159     }
2160
2161     prop->set(obj, value, errp);
2162 }
2163
2164 static void property_release_bool(Object *obj, const char *name,
2165                                   void *opaque)
2166 {
2167     BoolProperty *prop = opaque;
2168     g_free(prop);
2169 }
2170
2171 ObjectProperty *
2172 object_property_add_bool(Object *obj, const char *name,
2173                          bool (*get)(Object *, Error **),
2174                          void (*set)(Object *, bool, Error **))
2175 {
2176     BoolProperty *prop = g_malloc0(sizeof(*prop));
2177
2178     prop->get = get;
2179     prop->set = set;
2180
2181     return object_property_add(obj, name, "bool",
2182                                get ? property_get_bool : NULL,
2183                                set ? property_set_bool : NULL,
2184                                property_release_bool,
2185                                prop);
2186 }
2187
2188 ObjectProperty *
2189 object_class_property_add_bool(ObjectClass *klass, const char *name,
2190                                     bool (*get)(Object *, Error **),
2191                                     void (*set)(Object *, bool, Error **))
2192 {
2193     BoolProperty *prop = g_malloc0(sizeof(*prop));
2194
2195     prop->get = get;
2196     prop->set = set;
2197
2198     return object_class_property_add(klass, name, "bool",
2199                                      get ? property_get_bool : NULL,
2200                                      set ? property_set_bool : NULL,
2201                                      NULL,
2202                                      prop);
2203 }
2204
2205 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2206                               void *opaque, Error **errp)
2207 {
2208     EnumProperty *prop = opaque;
2209     int value;
2210     Error *err = NULL;
2211
2212     value = prop->get(obj, &err);
2213     if (err) {
2214         error_propagate(errp, err);
2215         return;
2216     }
2217
2218     visit_type_enum(v, name, &value, prop->lookup, errp);
2219 }
2220
2221 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2222                               void *opaque, Error **errp)
2223 {
2224     EnumProperty *prop = opaque;
2225     int value;
2226     Error *err = NULL;
2227
2228     visit_type_enum(v, name, &value, prop->lookup, &err);
2229     if (err) {
2230         error_propagate(errp, err);
2231         return;
2232     }
2233     prop->set(obj, value, errp);
2234 }
2235
2236 static void property_release_enum(Object *obj, const char *name,
2237                                   void *opaque)
2238 {
2239     EnumProperty *prop = opaque;
2240     g_free(prop);
2241 }
2242
2243 ObjectProperty *
2244 object_property_add_enum(Object *obj, const char *name,
2245                          const char *typename,
2246                          const QEnumLookup *lookup,
2247                          int (*get)(Object *, Error **),
2248                          void (*set)(Object *, int, Error **))
2249 {
2250     EnumProperty *prop = g_malloc(sizeof(*prop));
2251
2252     prop->lookup = lookup;
2253     prop->get = get;
2254     prop->set = set;
2255
2256     return object_property_add(obj, name, typename,
2257                                get ? property_get_enum : NULL,
2258                                set ? property_set_enum : NULL,
2259                                property_release_enum,
2260                                prop);
2261 }
2262
2263 ObjectProperty *
2264 object_class_property_add_enum(ObjectClass *klass, const char *name,
2265                                     const char *typename,
2266                                     const QEnumLookup *lookup,
2267                                     int (*get)(Object *, Error **),
2268                                     void (*set)(Object *, int, Error **))
2269 {
2270     EnumProperty *prop = g_malloc(sizeof(*prop));
2271
2272     prop->lookup = lookup;
2273     prop->get = get;
2274     prop->set = set;
2275
2276     return object_class_property_add(klass, name, typename,
2277                                      get ? property_get_enum : NULL,
2278                                      set ? property_set_enum : NULL,
2279                                      NULL,
2280                                      prop);
2281 }
2282
2283 typedef struct TMProperty {
2284     void (*get)(Object *, struct tm *, Error **);
2285 } TMProperty;
2286
2287 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2288                             void *opaque, Error **errp)
2289 {
2290     TMProperty *prop = opaque;
2291     Error *err = NULL;
2292     struct tm value;
2293
2294     prop->get(obj, &value, &err);
2295     if (err) {
2296         goto out;
2297     }
2298
2299     visit_start_struct(v, name, NULL, 0, &err);
2300     if (err) {
2301         goto out;
2302     }
2303     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2304     if (err) {
2305         goto out_end;
2306     }
2307     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2308     if (err) {
2309         goto out_end;
2310     }
2311     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2312     if (err) {
2313         goto out_end;
2314     }
2315     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2316     if (err) {
2317         goto out_end;
2318     }
2319     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2320     if (err) {
2321         goto out_end;
2322     }
2323     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2324     if (err) {
2325         goto out_end;
2326     }
2327     visit_check_struct(v, &err);
2328 out_end:
2329     visit_end_struct(v, NULL);
2330 out:
2331     error_propagate(errp, err);
2332
2333 }
2334
2335 static void property_release_tm(Object *obj, const char *name,
2336                                 void *opaque)
2337 {
2338     TMProperty *prop = opaque;
2339     g_free(prop);
2340 }
2341
2342 ObjectProperty *
2343 object_property_add_tm(Object *obj, const char *name,
2344                        void (*get)(Object *, struct tm *, Error **))
2345 {
2346     TMProperty *prop = g_malloc0(sizeof(*prop));
2347
2348     prop->get = get;
2349
2350     return object_property_add(obj, name, "struct tm",
2351                                get ? property_get_tm : NULL, NULL,
2352                                property_release_tm,
2353                                prop);
2354 }
2355
2356 ObjectProperty *
2357 object_class_property_add_tm(ObjectClass *klass, const char *name,
2358                              void (*get)(Object *, struct tm *, Error **))
2359 {
2360     TMProperty *prop = g_malloc0(sizeof(*prop));
2361
2362     prop->get = get;
2363
2364     return object_class_property_add(klass, name, "struct tm",
2365                                      get ? property_get_tm : NULL,
2366                                      NULL, NULL, prop);
2367 }
2368
2369 static char *qdev_get_type(Object *obj, Error **errp)
2370 {
2371     return g_strdup(object_get_typename(obj));
2372 }
2373
2374 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2375                                    void *opaque, Error **errp)
2376 {
2377     uint8_t value = *(uint8_t *)opaque;
2378     visit_type_uint8(v, name, &value, errp);
2379 }
2380
2381 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2382                                    void *opaque, Error **errp)
2383 {
2384     uint8_t *field = opaque;
2385     uint8_t value;
2386     Error *local_err = NULL;
2387
2388     visit_type_uint8(v, name, &value, &local_err);
2389     if (local_err) {
2390         error_propagate(errp, local_err);
2391         return;
2392     }
2393
2394     *field = value;
2395 }
2396
2397 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2398                                     void *opaque, Error **errp)
2399 {
2400     uint16_t value = *(uint16_t *)opaque;
2401     visit_type_uint16(v, name, &value, errp);
2402 }
2403
2404 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2405                                     void *opaque, Error **errp)
2406 {
2407     uint16_t *field = opaque;
2408     uint16_t value;
2409     Error *local_err = NULL;
2410
2411     visit_type_uint16(v, name, &value, &local_err);
2412     if (local_err) {
2413         error_propagate(errp, local_err);
2414         return;
2415     }
2416
2417     *field = value;
2418 }
2419
2420 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2421                                     void *opaque, Error **errp)
2422 {
2423     uint32_t value = *(uint32_t *)opaque;
2424     visit_type_uint32(v, name, &value, errp);
2425 }
2426
2427 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2428                                     void *opaque, Error **errp)
2429 {
2430     uint32_t *field = opaque;
2431     uint32_t value;
2432     Error *local_err = NULL;
2433
2434     visit_type_uint32(v, name, &value, &local_err);
2435     if (local_err) {
2436         error_propagate(errp, local_err);
2437         return;
2438     }
2439
2440     *field = value;
2441 }
2442
2443 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2444                                     void *opaque, Error **errp)
2445 {
2446     uint64_t value = *(uint64_t *)opaque;
2447     visit_type_uint64(v, name, &value, errp);
2448 }
2449
2450 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2451                                     void *opaque, Error **errp)
2452 {
2453     uint64_t *field = opaque;
2454     uint64_t value;
2455     Error *local_err = NULL;
2456
2457     visit_type_uint64(v, name, &value, &local_err);
2458     if (local_err) {
2459         error_propagate(errp, local_err);
2460         return;
2461     }
2462
2463     *field = value;
2464 }
2465
2466 ObjectProperty *
2467 object_property_add_uint8_ptr(Object *obj, const char *name,
2468                               const uint8_t *v,
2469                               ObjectPropertyFlags flags)
2470 {
2471     ObjectPropertyAccessor *getter = NULL;
2472     ObjectPropertyAccessor *setter = NULL;
2473
2474     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2475         getter = property_get_uint8_ptr;
2476     }
2477
2478     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2479         setter = property_set_uint8_ptr;
2480     }
2481
2482     return object_property_add(obj, name, "uint8",
2483                                getter, setter, NULL, (void *)v);
2484 }
2485
2486 ObjectProperty *
2487 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2488                                     const uint8_t *v,
2489                                     ObjectPropertyFlags flags)
2490 {
2491     ObjectPropertyAccessor *getter = NULL;
2492     ObjectPropertyAccessor *setter = NULL;
2493
2494     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2495         getter = property_get_uint8_ptr;
2496     }
2497
2498     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2499         setter = property_set_uint8_ptr;
2500     }
2501
2502     return object_class_property_add(klass, name, "uint8",
2503                                      getter, setter, NULL, (void *)v);
2504 }
2505
2506 ObjectProperty *
2507 object_property_add_uint16_ptr(Object *obj, const char *name,
2508                                const uint16_t *v,
2509                                ObjectPropertyFlags flags)
2510 {
2511     ObjectPropertyAccessor *getter = NULL;
2512     ObjectPropertyAccessor *setter = NULL;
2513
2514     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2515         getter = property_get_uint16_ptr;
2516     }
2517
2518     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2519         setter = property_set_uint16_ptr;
2520     }
2521
2522     return object_property_add(obj, name, "uint16",
2523                                getter, setter, NULL, (void *)v);
2524 }
2525
2526 ObjectProperty *
2527 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2528                                      const uint16_t *v,
2529                                      ObjectPropertyFlags flags)
2530 {
2531     ObjectPropertyAccessor *getter = NULL;
2532     ObjectPropertyAccessor *setter = NULL;
2533
2534     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2535         getter = property_get_uint16_ptr;
2536     }
2537
2538     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2539         setter = property_set_uint16_ptr;
2540     }
2541
2542     return object_class_property_add(klass, name, "uint16",
2543                                      getter, setter, NULL, (void *)v);
2544 }
2545
2546 ObjectProperty *
2547 object_property_add_uint32_ptr(Object *obj, const char *name,
2548                                const uint32_t *v,
2549                                ObjectPropertyFlags flags)
2550 {
2551     ObjectPropertyAccessor *getter = NULL;
2552     ObjectPropertyAccessor *setter = NULL;
2553
2554     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2555         getter = property_get_uint32_ptr;
2556     }
2557
2558     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2559         setter = property_set_uint32_ptr;
2560     }
2561
2562     return object_property_add(obj, name, "uint32",
2563                                getter, setter, NULL, (void *)v);
2564 }
2565
2566 ObjectProperty *
2567 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2568                                      const uint32_t *v,
2569                                      ObjectPropertyFlags flags)
2570 {
2571     ObjectPropertyAccessor *getter = NULL;
2572     ObjectPropertyAccessor *setter = NULL;
2573
2574     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2575         getter = property_get_uint32_ptr;
2576     }
2577
2578     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2579         setter = property_set_uint32_ptr;
2580     }
2581
2582     return object_class_property_add(klass, name, "uint32",
2583                                      getter, setter, NULL, (void *)v);
2584 }
2585
2586 ObjectProperty *
2587 object_property_add_uint64_ptr(Object *obj, const char *name,
2588                                const uint64_t *v,
2589                                ObjectPropertyFlags flags)
2590 {
2591     ObjectPropertyAccessor *getter = NULL;
2592     ObjectPropertyAccessor *setter = NULL;
2593
2594     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2595         getter = property_get_uint64_ptr;
2596     }
2597
2598     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2599         setter = property_set_uint64_ptr;
2600     }
2601
2602     return object_property_add(obj, name, "uint64",
2603                                getter, setter, NULL, (void *)v);
2604 }
2605
2606 ObjectProperty *
2607 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2608                                      const uint64_t *v,
2609                                      ObjectPropertyFlags flags)
2610 {
2611     ObjectPropertyAccessor *getter = NULL;
2612     ObjectPropertyAccessor *setter = NULL;
2613
2614     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2615         getter = property_get_uint64_ptr;
2616     }
2617
2618     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2619         setter = property_set_uint64_ptr;
2620     }
2621
2622     return object_class_property_add(klass, name, "uint64",
2623                                      getter, setter, NULL, (void *)v);
2624 }
2625
2626 typedef struct {
2627     Object *target_obj;
2628     char *target_name;
2629 } AliasProperty;
2630
2631 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2632                                void *opaque, Error **errp)
2633 {
2634     AliasProperty *prop = opaque;
2635
2636     object_property_get(prop->target_obj, v, prop->target_name, errp);
2637 }
2638
2639 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2640                                void *opaque, Error **errp)
2641 {
2642     AliasProperty *prop = opaque;
2643
2644     object_property_set(prop->target_obj, v, prop->target_name, errp);
2645 }
2646
2647 static Object *property_resolve_alias(Object *obj, void *opaque,
2648                                       const char *part)
2649 {
2650     AliasProperty *prop = opaque;
2651
2652     return object_resolve_path_component(prop->target_obj, prop->target_name);
2653 }
2654
2655 static void property_release_alias(Object *obj, const char *name, void *opaque)
2656 {
2657     AliasProperty *prop = opaque;
2658
2659     g_free(prop->target_name);
2660     g_free(prop);
2661 }
2662
2663 ObjectProperty *
2664 object_property_add_alias(Object *obj, const char *name,
2665                           Object *target_obj, const char *target_name)
2666 {
2667     AliasProperty *prop;
2668     ObjectProperty *op;
2669     ObjectProperty *target_prop;
2670     g_autofree char *prop_type = NULL;
2671
2672     target_prop = object_property_find(target_obj, target_name,
2673                                        &error_abort);
2674
2675     if (object_property_is_child(target_prop)) {
2676         prop_type = g_strdup_printf("link%s",
2677                                     target_prop->type + strlen("child"));
2678     } else {
2679         prop_type = g_strdup(target_prop->type);
2680     }
2681
2682     prop = g_malloc(sizeof(*prop));
2683     prop->target_obj = target_obj;
2684     prop->target_name = g_strdup(target_name);
2685
2686     op = object_property_add(obj, name, prop_type,
2687                              property_get_alias,
2688                              property_set_alias,
2689                              property_release_alias,
2690                              prop);
2691     op->resolve = property_resolve_alias;
2692     if (target_prop->defval) {
2693         op->defval = qobject_ref(target_prop->defval);
2694     }
2695
2696     object_property_set_description(obj, op->name,
2697                                     target_prop->description);
2698     return op;
2699 }
2700
2701 void object_property_set_description(Object *obj, const char *name,
2702                                      const char *description)
2703 {
2704     ObjectProperty *op;
2705
2706     op = object_property_find(obj, name, &error_abort);
2707     g_free(op->description);
2708     op->description = g_strdup(description);
2709 }
2710
2711 void object_class_property_set_description(ObjectClass *klass,
2712                                            const char *name,
2713                                            const char *description)
2714 {
2715     ObjectProperty *op;
2716
2717     op = g_hash_table_lookup(klass->properties, name);
2718     g_free(op->description);
2719     op->description = g_strdup(description);
2720 }
2721
2722 static void object_class_init(ObjectClass *klass, void *data)
2723 {
2724     object_class_property_add_str(klass, "type", qdev_get_type,
2725                                   NULL);
2726 }
2727
2728 static void register_types(void)
2729 {
2730     static TypeInfo interface_info = {
2731         .name = TYPE_INTERFACE,
2732         .class_size = sizeof(InterfaceClass),
2733         .abstract = true,
2734     };
2735
2736     static TypeInfo object_info = {
2737         .name = TYPE_OBJECT,
2738         .instance_size = sizeof(Object),
2739         .class_init = object_class_init,
2740         .abstract = true,
2741     };
2742
2743     type_interface = type_register_internal(&interface_info);
2744     type_register_internal(&object_info);
2745 }
2746
2747 type_init(register_types)