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,
 266                                            iface_impl->class);
 267 }
 268
 269 static void object_property_free(gpointer data)
 270 {
 271     ObjectProperty *prop = data;
 272
 273     if (prop->defval) {
 274         qobject_unref(prop->defval);
 275         prop->defval = NULL;
 276     }
 277     g_free(prop->name);
 278     g_free(prop->type);
 279     g_free(prop->description);
 280     g_free(prop);
 281 }
 282
 283 static void type_initialize(TypeImpl *ti)
 284 {
 285     TypeImpl *parent;
 286
 287     if (ti->class) {
 288         return;
 289     }
 290
 291     ti->class_size = type_class_get_size(ti);
 292     ti->instance_size = type_object_get_size(ti);
 293     /* Any type with zero instance_size is implicitly abstract.
 294      * This means interface types are all abstract.
 295      */
 296     if (ti->instance_size == 0) {
 297         ti->abstract = true;
 298     }
 299     if (type_is_ancestor(ti, type_interface)) {
 300         assert(ti->instance_size == 0);
 301         assert(ti->abstract);
 302         assert(!ti->instance_init);
 303         assert(!ti->instance_post_init);
 304         assert(!ti->instance_finalize);
 305         assert(!ti->num_interfaces);
 306     }
 307     ti->class = g_malloc0(ti->class_size);
 308
 309     parent = type_get_parent(ti);
 310     if (parent) {
 311         type_initialize(parent);
 312         GSList *e;
 313         int i;
 314
 315         g_assert(parent->class_size <= ti->class_size);
 316         g_assert(parent->instance_size <= ti->instance_size);
 317         memcpy(ti->class, parent->class, parent->class_size);
 318         ti->class->interfaces = NULL;
 319         ti->class->properties = g_hash_table_new_full(
 320             g_str_hash, g_str_equal, NULL, object_property_free);
 321
 322         for (e = parent->class->interfaces; e; e = e->next) {
 323             InterfaceClass *iface = e->data;
 324             ObjectClass *klass = OBJECT_CLASS(iface);
 325
 326             type_initialize_interface(ti, iface->interface_type, klass->type);
 327         }
 328
 329         for (i = 0; i < ti->num_interfaces; i++) {
 330             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 331             if (!t) {
 332                 error_report("missing interface '%s' for object '%s'",
 333                              ti->interfaces[i].typename, parent->name);
 334                 abort();
 335             }
 336             for (e = ti->class->interfaces; e; e = e->next) {
 337                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 338
 339                 if (type_is_ancestor(target_type, t)) {
 340                     break;
 341                 }
 342             }
 343
 344             if (e) {
 345                 continue;
 346             }
 347
 348             type_initialize_interface(ti, t, t);
 349         }
 350     } else {
 351         ti->class->properties = g_hash_table_new_full(
 352             g_str_hash, g_str_equal, NULL, object_property_free);
 353     }
 354
 355     ti->class->type = ti;
 356
 357     while (parent) {
 358         if (parent->class_base_init) {
 359             parent->class_base_init(ti->class, ti->class_data);
 360         }
 361         parent = type_get_parent(parent);
 362     }
 363
 364     if (ti->class_init) {
 365         ti->class_init(ti->class, ti->class_data);
 366     }
 367 }
 368
 369 static void object_init_with_type(Object *obj, TypeImpl *ti)
 370 {
 371     if (type_has_parent(ti)) {
 372         object_init_with_type(obj, type_get_parent(ti));
 373     }
 374
 375     if (ti->instance_init) {
 376         ti->instance_init(obj);
 377     }
 378 }
 379
 380 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 381 {
 382     if (ti->instance_post_init) {
 383         ti->instance_post_init(obj);
 384     }
 385
 386     if (type_has_parent(ti)) {
 387         object_post_init_with_type(obj, type_get_parent(ti));
 388     }
 389 }
 390
 391 void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp)
 392 {
 393     int i;
 394
 395     if (!props) {
 396         return;
 397     }
 398
 399     for (i = 0; i < props->len; i++) {
 400         GlobalProperty *p = g_ptr_array_index(props, i);
 401         Error *err = NULL;
 402
 403         if (object_dynamic_cast(obj, p->driver) == NULL) {
 404             continue;
 405         }
 406         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 407             continue;
 408         }
 409         p->used = true;
 410         object_property_parse(obj, p->value, p->property, &err);
 411         if (err != NULL) {
 412             error_prepend(&err, "can't apply global %s.%s=%s: ",
 413                           p->driver, p->property, p->value);
 414             /*
 415              * If errp != NULL, propagate error and return.
 416              * If errp == NULL, report a warning, but keep going
 417              * with the remaining globals.
 418              */
 419             if (errp) {
 420                 error_propagate(errp, err);
 421                 return;
 422             } else {
 423                 warn_report_err(err);
 424             }
 425         }
 426     }
 427 }
 428
 429 /*
 430  * Global property defaults
 431  * Slot 0: accelerator's global property defaults
 432  * Slot 1: machine's global property defaults
 433  * Slot 2: global properties from legacy command line option
 434  * Each is a GPtrArray of of GlobalProperty.
 435  * Applied in order, later entries override earlier ones.
 436  */
 437 static GPtrArray *object_compat_props[3];
 438
 439 /*
 440  * Retrieve @GPtrArray for global property defined with options
 441  * other than "-global".  These are generally used for syntactic
 442  * sugar and legacy command line options.
 443  */
 444 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 445 {
 446     GlobalProperty *g;
 447     if (!object_compat_props[2]) {
 448         object_compat_props[2] = g_ptr_array_new();
 449     }
 450     g = g_new0(GlobalProperty, 1);
 451     g->driver = g_strdup(driver);
 452     g->property = g_strdup(prop);
 453     g->value = g_strdup(value);
 454     g_ptr_array_add(object_compat_props[2], g);
 455 }
 456
 457 /*
 458  * Set machine's global property defaults to @compat_props.
 459  * May be called at most once.
 460  */
 461 void object_set_machine_compat_props(GPtrArray *compat_props)
 462 {
 463     assert(!object_compat_props[1]);
 464     object_compat_props[1] = compat_props;
 465 }
 466
 467 /*
 468  * Set accelerator's global property defaults to @compat_props.
 469  * May be called at most once.
 470  */
 471 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 472 {
 473     assert(!object_compat_props[0]);
 474     object_compat_props[0] = compat_props;
 475 }
 476
 477 void object_apply_compat_props(Object *obj)
 478 {
 479     int i;
 480
 481     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 482         object_apply_global_props(obj, object_compat_props[i],
 483                                   i == 2 ? &error_fatal : &error_abort);
 484     }
 485 }
 486
 487 static void object_class_property_init_all(Object *obj)
 488 {
 489     ObjectPropertyIterator iter;
 490     ObjectProperty *prop;
 491
 492     object_class_property_iter_init(&iter, object_get_class(obj));
 493     while ((prop = object_property_iter_next(&iter))) {
 494         if (prop->init) {
 495             prop->init(obj, prop);
 496         }
 497     }
 498 }
 499
 500 static void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 501 {
 502     Object *obj = data;
 503
 504     type_initialize(type);
 505
 506     g_assert(type->instance_size >= sizeof(Object));
 507     g_assert(type->abstract == false);
 508     g_assert(size >= type->instance_size);
 509
 510     memset(obj, 0, type->instance_size);
 511     obj->class = type->class;
 512     object_ref(obj);
 513     object_class_property_init_all(obj);
 514     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 515                                             NULL, object_property_free);
 516     object_init_with_type(obj, type);
 517     object_post_init_with_type(obj, type);
 518 }
 519
 520 void object_initialize(void *data, size_t size, const char *typename)
 521 {
 522     TypeImpl *type = type_get_by_name(typename);
 523
 524     if (!type) {
 525         error_report("missing object type '%s'", typename);
 526         abort();
 527     }
 528
 529     object_initialize_with_type(data, size, type);
 530 }
 531
 532 void object_initialize_child(Object *parentobj, const char *propname,
 533                              void *childobj, size_t size, const char *type,
 534                              Error **errp, ...)
 535 {
 536     va_list vargs;
 537
 538     va_start(vargs, errp);
 539     object_initialize_childv(parentobj, propname, childobj, size, type, errp,
 540                              vargs);
 541     va_end(vargs);
 542 }
 543
 544 void object_initialize_childv(Object *parentobj, const char *propname,
 545                               void *childobj, size_t size, const char *type,
 546                               Error **errp, va_list vargs)
 547 {
 548     Error *local_err = NULL;
 549     Object *obj;
 550     UserCreatable *uc;
 551
 552     object_initialize(childobj, size, type);
 553     obj = OBJECT(childobj);
 554
 555     object_set_propv(obj, &local_err, vargs);
 556     if (local_err) {
 557         goto out;
 558     }
 559
 560     object_property_add_child(parentobj, propname, obj);
 561
 562     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 563     if (uc) {
 564         user_creatable_complete(uc, &local_err);
 565         if (local_err) {
 566             object_unparent(obj);
 567             goto out;
 568         }
 569     }
 570
 571 out:
 572     /*
 573      * We want @obj's reference to be 1 on success, 0 on failure.
 574      * On success, it's 2: one taken by object_initialize(), and one
 575      * by object_property_add_child().
 576      * On failure in object_initialize() or earlier, it's 1.
 577      * On failure afterwards, it's also 1: object_unparent() releases
 578      * the reference taken by object_property_add_child().
 579      */
 580     object_unref(obj);
 581
 582     error_propagate(errp, local_err);
 583 }
 584
 585 static inline bool object_property_is_child(ObjectProperty *prop)
 586 {
 587     return strstart(prop->type, "child<", NULL);
 588 }
 589
 590 static void object_property_del_all(Object *obj)
 591 {
 592     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 593     ObjectProperty *prop;
 594     ObjectPropertyIterator iter;
 595     bool released;
 596
 597     do {
 598         released = false;
 599         object_property_iter_init(&iter, obj);
 600         while ((prop = object_property_iter_next(&iter)) != NULL) {
 601             if (g_hash_table_add(done, prop)) {
 602                 if (prop->release) {
 603                     prop->release(obj, prop->name, prop->opaque);
 604                     released = true;
 605                     break;
 606                 }
 607             }
 608         }
 609     } while (released);
 610
 611     g_hash_table_unref(obj->properties);
 612 }
 613
 614 static void object_property_del_child(Object *obj, Object *child)
 615 {
 616     ObjectProperty *prop;
 617     GHashTableIter iter;
 618     gpointer key, value;
 619
 620     g_hash_table_iter_init(&iter, obj->properties);
 621     while (g_hash_table_iter_next(&iter, &key, &value)) {
 622         prop = value;
 623         if (object_property_is_child(prop) && prop->opaque == child) {
 624             if (prop->release) {
 625                 prop->release(obj, prop->name, prop->opaque);
 626                 prop->release = NULL;
 627             }
 628             break;
 629         }
 630     }
 631     g_hash_table_iter_init(&iter, obj->properties);
 632     while (g_hash_table_iter_next(&iter, &key, &value)) {
 633         prop = value;
 634         if (object_property_is_child(prop) && prop->opaque == child) {
 635             g_hash_table_iter_remove(&iter);
 636             break;
 637         }
 638     }
 639 }
 640
 641 void object_unparent(Object *obj)
 642 {
 643     if (obj->parent) {
 644         object_property_del_child(obj->parent, obj);
 645     }
 646 }
 647
 648 static void object_deinit(Object *obj, TypeImpl *type)
 649 {
 650     if (type->instance_finalize) {
 651         type->instance_finalize(obj);
 652     }
 653
 654     if (type_has_parent(type)) {
 655         object_deinit(obj, type_get_parent(type));
 656     }
 657 }
 658
 659 static void object_finalize(void *data)
 660 {
 661     Object *obj = data;
 662     TypeImpl *ti = obj->class->type;
 663
 664     object_property_del_all(obj);
 665     object_deinit(obj, ti);
 666
 667     g_assert(obj->ref == 0);
 668     if (obj->free) {
 669         obj->free(obj);
 670     }
 671 }
 672
 673 static Object *object_new_with_type(Type type)
 674 {
 675     Object *obj;
 676
 677     g_assert(type != NULL);
 678     type_initialize(type);
 679
 680     obj = g_malloc(type->instance_size);
 681     object_initialize_with_type(obj, type->instance_size, type);
 682     obj->free = g_free;
 683
 684     return obj;
 685 }
 686
 687 Object *object_new_with_class(ObjectClass *klass)
 688 {
 689     return object_new_with_type(klass->type);
 690 }
 691
 692 Object *object_new(const char *typename)
 693 {
 694     TypeImpl *ti = type_get_by_name(typename);
 695
 696     return object_new_with_type(ti);
 697 }
 698
 699
 700 Object *object_new_with_props(const char *typename,
 701                               Object *parent,
 702                               const char *id,
 703                               Error **errp,
 704                               ...)
 705 {
 706     va_list vargs;
 707     Object *obj;
 708
 709     va_start(vargs, errp);
 710     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 711     va_end(vargs);
 712
 713     return obj;
 714 }
 715
 716
 717 Object *object_new_with_propv(const char *typename,
 718                               Object *parent,
 719                               const char *id,
 720                               Error **errp,
 721                               va_list vargs)
 722 {
 723     Object *obj;
 724     ObjectClass *klass;
 725     Error *local_err = NULL;
 726     UserCreatable *uc;
 727
 728     klass = object_class_by_name(typename);
 729     if (!klass) {
 730         error_setg(errp, "invalid object type: %s", typename);
 731         return NULL;
 732     }
 733
 734     if (object_class_is_abstract(klass)) {
 735         error_setg(errp, "object type '%s' is abstract", typename);
 736         return NULL;
 737     }
 738     obj = object_new_with_type(klass->type);
 739
 740     if (object_set_propv(obj, &local_err, vargs) < 0) {
 741         goto error;
 742     }
 743
 744     if (id != NULL) {
 745         object_property_add_child(parent, id, obj);
 746     }
 747
 748     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 749     if (uc) {
 750         user_creatable_complete(uc, &local_err);
 751         if (local_err) {
 752             if (id != NULL) {
 753                 object_unparent(obj);
 754             }
 755             goto error;
 756         }
 757     }
 758
 759     object_unref(obj);
 760     return obj;
 761
 762  error:
 763     error_propagate(errp, local_err);
 764     object_unref(obj);
 765     return NULL;
 766 }
 767
 768
 769 int object_set_props(Object *obj,
 770                      Error **errp,
 771                      ...)
 772 {
 773     va_list vargs;
 774     int ret;
 775
 776     va_start(vargs, errp);
 777     ret = object_set_propv(obj, errp, vargs);
 778     va_end(vargs);
 779
 780     return ret;
 781 }
 782
 783
 784 int object_set_propv(Object *obj,
 785                      Error **errp,
 786                      va_list vargs)
 787 {
 788     const char *propname;
 789     Error *local_err = NULL;
 790
 791     propname = va_arg(vargs, char *);
 792     while (propname != NULL) {
 793         const char *value = va_arg(vargs, char *);
 794
 795         g_assert(value != NULL);
 796         object_property_parse(obj, value, propname, &local_err);
 797         if (local_err) {
 798             error_propagate(errp, local_err);
 799             return -1;
 800         }
 801         propname = va_arg(vargs, char *);
 802     }
 803
 804     return 0;
 805 }
 806
 807
 808 Object *object_dynamic_cast(Object *obj, const char *typename)
 809 {
 810     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 811         return obj;
 812     }
 813
 814     return NULL;
 815 }
 816
 817 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 818                                    const char *file, int line, const char *func)
 819 {
 820     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 821                                      typename, file, line, func);
 822
 823 #ifdef CONFIG_QOM_CAST_DEBUG
 824     int i;
 825     Object *inst;
 826
 827     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 828         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 829             goto out;
 830         }
 831     }
 832
 833     inst = object_dynamic_cast(obj, typename);
 834
 835     if (!inst && obj) {
 836         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 837                 file, line, func, obj, typename);
 838         abort();
 839     }
 840
 841     assert(obj == inst);
 842
 843     if (obj && obj == inst) {
 844         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 845             atomic_set(&obj->class->object_cast_cache[i - 1],
 846                        atomic_read(&obj->class->object_cast_cache[i]));
 847         }
 848         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 849     }
 850
 851 out:
 852 #endif
 853     return obj;
 854 }
 855
 856 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 857                                        const char *typename)
 858 {
 859     ObjectClass *ret = NULL;
 860     TypeImpl *target_type;
 861     TypeImpl *type;
 862
 863     if (!class) {
 864         return NULL;
 865     }
 866
 867     /* A simple fast path that can trigger a lot for leaf classes.  */
 868     type = class->type;
 869     if (type->name == typename) {
 870         return class;
 871     }
 872
 873     target_type = type_get_by_name(typename);
 874     if (!target_type) {
 875         /* target class type unknown, so fail the cast */
 876         return NULL;
 877     }
 878
 879     if (type->class->interfaces &&
 880             type_is_ancestor(target_type, type_interface)) {
 881         int found = 0;
 882         GSList *i;
 883
 884         for (i = class->interfaces; i; i = i->next) {
 885             ObjectClass *target_class = i->data;
 886
 887             if (type_is_ancestor(target_class->type, target_type)) {
 888                 ret = target_class;
 889                 found++;
 890             }
 891          }
 892
 893         /* The match was ambiguous, don't allow a cast */
 894         if (found > 1) {
 895             ret = NULL;
 896         }
 897     } else if (type_is_ancestor(type, target_type)) {
 898         ret = class;
 899     }
 900
 901     return ret;
 902 }
 903
 904 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 905                                               const char *typename,
 906                                               const char *file, int line,
 907                                               const char *func)
 908 {
 909     ObjectClass *ret;
 910
 911     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 912                                            typename, file, line, func);
 913
 914 #ifdef CONFIG_QOM_CAST_DEBUG
 915     int i;
 916
 917     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 918         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 919             ret = class;
 920             goto out;
 921         }
 922     }
 923 #else
 924     if (!class || !class->interfaces) {
 925         return class;
 926     }
 927 #endif
 928
 929     ret = object_class_dynamic_cast(class, typename);
 930     if (!ret && class) {
 931         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 932                 file, line, func, class, typename);
 933         abort();
 934     }
 935
 936 #ifdef CONFIG_QOM_CAST_DEBUG
 937     if (class && ret == class) {
 938         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 939             atomic_set(&class->class_cast_cache[i - 1],
 940                        atomic_read(&class->class_cast_cache[i]));
 941         }
 942         atomic_set(&class->class_cast_cache[i - 1], typename);
 943     }
 944 out:
 945 #endif
 946     return ret;
 947 }
 948
 949 const char *object_get_typename(const Object *obj)
 950 {
 951     return obj->class->type->name;
 952 }
 953
 954 ObjectClass *object_get_class(Object *obj)
 955 {
 956     return obj->class;
 957 }
 958
 959 bool object_class_is_abstract(ObjectClass *klass)
 960 {
 961     return klass->type->abstract;
 962 }
 963
 964 const char *object_class_get_name(ObjectClass *klass)
 965 {
 966     return klass->type->name;
 967 }
 968
 969 ObjectClass *object_class_by_name(const char *typename)
 970 {
 971     TypeImpl *type = type_get_by_name(typename);
 972
 973     if (!type) {
 974         return NULL;
 975     }
 976
 977     type_initialize(type);
 978
 979     return type->class;
 980 }
 981
 982 ObjectClass *object_class_get_parent(ObjectClass *class)
 983 {
 984     TypeImpl *type = type_get_parent(class->type);
 985
 986     if (!type) {
 987         return NULL;
 988     }
 989
 990     type_initialize(type);
 991
 992     return type->class;
 993 }
 994
 995 typedef struct OCFData
 996 {
 997     void (*fn)(ObjectClass *klass, void *opaque);
 998     const char *implements_type;
 999     bool include_abstract;
1000     void *opaque;
1001 } OCFData;
1002
1003 static void object_class_foreach_tramp(gpointer key, gpointer value,
1004                                        gpointer opaque)
1005 {
1006     OCFData *data = opaque;
1007     TypeImpl *type = value;
1008     ObjectClass *k;
1009
1010     type_initialize(type);
1011     k = type->class;
1012
1013     if (!data->include_abstract && type->abstract) {
1014         return;
1015     }
1016
1017     if (data->implements_type &&
1018         !object_class_dynamic_cast(k, data->implements_type)) {
1019         return;
1020     }
1021
1022     data->fn(k, data->opaque);
1023 }
1024
1025 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1026                           const char *implements_type, bool include_abstract,
1027                           void *opaque)
1028 {
1029     OCFData data = { fn, implements_type, include_abstract, opaque };
1030
1031     enumerating_types = true;
1032     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1033     enumerating_types = false;
1034 }
1035
1036 static int do_object_child_foreach(Object *obj,
1037                                    int (*fn)(Object *child, void *opaque),
1038                                    void *opaque, bool recurse)
1039 {
1040     GHashTableIter iter;
1041     ObjectProperty *prop;
1042     int ret = 0;
1043
1044     g_hash_table_iter_init(&iter, obj->properties);
1045     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1046         if (object_property_is_child(prop)) {
1047             Object *child = prop->opaque;
1048
1049             ret = fn(child, opaque);
1050             if (ret != 0) {
1051                 break;
1052             }
1053             if (recurse) {
1054                 ret = do_object_child_foreach(child, fn, opaque, true);
1055                 if (ret != 0) {
1056                     break;
1057                 }
1058             }
1059         }
1060     }
1061     return ret;
1062 }
1063
1064 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1065                          void *opaque)
1066 {
1067     return do_object_child_foreach(obj, fn, opaque, false);
1068 }
1069
1070 int object_child_foreach_recursive(Object *obj,
1071                                    int (*fn)(Object *child, void *opaque),
1072                                    void *opaque)
1073 {
1074     return do_object_child_foreach(obj, fn, opaque, true);
1075 }
1076
1077 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1078 {
1079     GSList **list = opaque;
1080
1081     *list = g_slist_prepend(*list, klass);
1082 }
1083
1084 GSList *object_class_get_list(const char *implements_type,
1085                               bool include_abstract)
1086 {
1087     GSList *list = NULL;
1088
1089     object_class_foreach(object_class_get_list_tramp,
1090                          implements_type, include_abstract, &list);
1091     return list;
1092 }
1093
1094 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1095 {
1096     return strcasecmp(object_class_get_name((ObjectClass *)a),
1097                       object_class_get_name((ObjectClass *)b));
1098 }
1099
1100 GSList *object_class_get_list_sorted(const char *implements_type,
1101                                      bool include_abstract)
1102 {
1103     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1104                         object_class_cmp);
1105 }
1106
1107 Object *object_ref(Object *obj)
1108 {
1109     if (!obj) {
1110         return NULL;
1111     }
1112     atomic_inc(&obj->ref);
1113     return obj;
1114 }
1115
1116 void object_unref(Object *obj)
1117 {
1118     if (!obj) {
1119         return;
1120     }
1121     g_assert(obj->ref > 0);
1122
1123     /* parent always holds a reference to its children */
1124     if (atomic_fetch_dec(&obj->ref) == 1) {
1125         object_finalize(obj);
1126     }
1127 }
1128
1129 static ObjectProperty *
1130 object_property_try_add(Object *obj, const char *name, const char *type,
1131                         ObjectPropertyAccessor *get,
1132                         ObjectPropertyAccessor *set,
1133                         ObjectPropertyRelease *release,
1134                         void *opaque, Error **errp)
1135 {
1136     ObjectProperty *prop;
1137     size_t name_len = strlen(name);
1138
1139     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1140         int i;
1141         ObjectProperty *ret;
1142         char *name_no_array = g_strdup(name);
1143
1144         name_no_array[name_len - 3] = '\0';
1145         for (i = 0; ; ++i) {
1146             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1147
1148             ret = object_property_try_add(obj, full_name, type, get, set,
1149                                           release, opaque, NULL);
1150             g_free(full_name);
1151             if (ret) {
1152                 break;
1153             }
1154         }
1155         g_free(name_no_array);
1156         return ret;
1157     }
1158
1159     if (object_property_find(obj, name, NULL) != NULL) {
1160         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1161                    name, object_get_typename(obj));
1162         return NULL;
1163     }
1164
1165     prop = g_malloc0(sizeof(*prop));
1166
1167     prop->name = g_strdup(name);
1168     prop->type = g_strdup(type);
1169
1170     prop->get = get;
1171     prop->set = set;
1172     prop->release = release;
1173     prop->opaque = opaque;
1174
1175     g_hash_table_insert(obj->properties, prop->name, prop);
1176     return prop;
1177 }
1178
1179 ObjectProperty *
1180 object_property_add(Object *obj, const char *name, const char *type,
1181                     ObjectPropertyAccessor *get,
1182                     ObjectPropertyAccessor *set,
1183                     ObjectPropertyRelease *release,
1184                     void *opaque)
1185 {
1186     return object_property_try_add(obj, name, type, get, set, release,
1187                                    opaque, &error_abort);
1188 }
1189
1190 ObjectProperty *
1191 object_class_property_add(ObjectClass *klass,
1192                           const char *name,
1193                           const char *type,
1194                           ObjectPropertyAccessor *get,
1195                           ObjectPropertyAccessor *set,
1196                           ObjectPropertyRelease *release,
1197                           void *opaque)
1198 {
1199     ObjectProperty *prop;
1200
1201     assert(!object_class_property_find(klass, name, NULL));
1202
1203     prop = g_malloc0(sizeof(*prop));
1204
1205     prop->name = g_strdup(name);
1206     prop->type = g_strdup(type);
1207
1208     prop->get = get;
1209     prop->set = set;
1210     prop->release = release;
1211     prop->opaque = opaque;
1212
1213     g_hash_table_insert(klass->properties, prop->name, prop);
1214
1215     return prop;
1216 }
1217
1218 ObjectProperty *object_property_find(Object *obj, const char *name,
1219                                      Error **errp)
1220 {
1221     ObjectProperty *prop;
1222     ObjectClass *klass = object_get_class(obj);
1223
1224     prop = object_class_property_find(klass, name, NULL);
1225     if (prop) {
1226         return prop;
1227     }
1228
1229     prop = g_hash_table_lookup(obj->properties, name);
1230     if (prop) {
1231         return prop;
1232     }
1233
1234     error_setg(errp, "Property '.%s' not found", name);
1235     return NULL;
1236 }
1237
1238 void object_property_iter_init(ObjectPropertyIterator *iter,
1239                                Object *obj)
1240 {
1241     g_hash_table_iter_init(&iter->iter, obj->properties);
1242     iter->nextclass = object_get_class(obj);
1243 }
1244
1245 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1246 {
1247     gpointer key, val;
1248     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1249         if (!iter->nextclass) {
1250             return NULL;
1251         }
1252         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1253         iter->nextclass = object_class_get_parent(iter->nextclass);
1254     }
1255     return val;
1256 }
1257
1258 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1259                                      ObjectClass *klass)
1260 {
1261     g_hash_table_iter_init(&iter->iter, klass->properties);
1262     iter->nextclass = object_class_get_parent(klass);
1263 }
1264
1265 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1266                                            Error **errp)
1267 {
1268     ObjectProperty *prop;
1269     ObjectClass *parent_klass;
1270
1271     parent_klass = object_class_get_parent(klass);
1272     if (parent_klass) {
1273         prop = object_class_property_find(parent_klass, name, NULL);
1274         if (prop) {
1275             return prop;
1276         }
1277     }
1278
1279     prop = g_hash_table_lookup(klass->properties, name);
1280     if (!prop) {
1281         error_setg(errp, "Property '.%s' not found", name);
1282     }
1283     return prop;
1284 }
1285
1286 void object_property_del(Object *obj, const char *name)
1287 {
1288     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1289
1290     if (prop->release) {
1291         prop->release(obj, name, prop->opaque);
1292     }
1293     g_hash_table_remove(obj->properties, name);
1294 }
1295
1296 void object_property_get(Object *obj, Visitor *v, const char *name,
1297                          Error **errp)
1298 {
1299     ObjectProperty *prop = object_property_find(obj, name, errp);
1300     if (prop == NULL) {
1301         return;
1302     }
1303
1304     if (!prop->get) {
1305         error_setg(errp, QERR_PERMISSION_DENIED);
1306     } else {
1307         prop->get(obj, v, name, prop->opaque, errp);
1308     }
1309 }
1310
1311 void object_property_set(Object *obj, Visitor *v, const char *name,
1312                          Error **errp)
1313 {
1314     ObjectProperty *prop = object_property_find(obj, name, errp);
1315     if (prop == NULL) {
1316         return;
1317     }
1318
1319     if (!prop->set) {
1320         error_setg(errp, QERR_PERMISSION_DENIED);
1321     } else {
1322         prop->set(obj, v, name, prop->opaque, errp);
1323     }
1324 }
1325
1326 void object_property_set_str(Object *obj, const char *value,
1327                              const char *name, Error **errp)
1328 {
1329     QString *qstr = qstring_from_str(value);
1330     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1331
1332     qobject_unref(qstr);
1333 }
1334
1335 char *object_property_get_str(Object *obj, const char *name,
1336                               Error **errp)
1337 {
1338     QObject *ret = object_property_get_qobject(obj, name, errp);
1339     char *retval;
1340
1341     if (!ret) {
1342         return NULL;
1343     }
1344
1345     retval = g_strdup(qobject_get_try_str(ret));
1346     if (!retval) {
1347         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1348     }
1349
1350     qobject_unref(ret);
1351     return retval;
1352 }
1353
1354 void object_property_set_link(Object *obj, Object *value,
1355                               const char *name, Error **errp)
1356 {
1357     if (value) {
1358         char *path = object_get_canonical_path(value);
1359         object_property_set_str(obj, path, name, errp);
1360         g_free(path);
1361     } else {
1362         object_property_set_str(obj, "", name, errp);
1363     }
1364 }
1365
1366 Object *object_property_get_link(Object *obj, const char *name,
1367                                  Error **errp)
1368 {
1369     char *str = object_property_get_str(obj, name, errp);
1370     Object *target = NULL;
1371
1372     if (str && *str) {
1373         target = object_resolve_path(str, NULL);
1374         if (!target) {
1375             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1376                       "Device '%s' not found", str);
1377         }
1378     }
1379
1380     g_free(str);
1381     return target;
1382 }
1383
1384 void object_property_set_bool(Object *obj, bool value,
1385                               const char *name, Error **errp)
1386 {
1387     QBool *qbool = qbool_from_bool(value);
1388     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1389
1390     qobject_unref(qbool);
1391 }
1392
1393 bool object_property_get_bool(Object *obj, const char *name,
1394                               Error **errp)
1395 {
1396     QObject *ret = object_property_get_qobject(obj, name, errp);
1397     QBool *qbool;
1398     bool retval;
1399
1400     if (!ret) {
1401         return false;
1402     }
1403     qbool = qobject_to(QBool, ret);
1404     if (!qbool) {
1405         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1406         retval = false;
1407     } else {
1408         retval = qbool_get_bool(qbool);
1409     }
1410
1411     qobject_unref(ret);
1412     return retval;
1413 }
1414
1415 void object_property_set_int(Object *obj, int64_t value,
1416                              const char *name, Error **errp)
1417 {
1418     QNum *qnum = qnum_from_int(value);
1419     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1420
1421     qobject_unref(qnum);
1422 }
1423
1424 int64_t object_property_get_int(Object *obj, const char *name,
1425                                 Error **errp)
1426 {
1427     QObject *ret = object_property_get_qobject(obj, name, errp);
1428     QNum *qnum;
1429     int64_t retval;
1430
1431     if (!ret) {
1432         return -1;
1433     }
1434
1435     qnum = qobject_to(QNum, ret);
1436     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1437         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1438         retval = -1;
1439     }
1440
1441     qobject_unref(ret);
1442     return retval;
1443 }
1444
1445 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1446 {
1447     Visitor *v = qobject_input_visitor_new(prop->defval);
1448
1449     assert(prop->set != NULL);
1450     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1451
1452     visit_free(v);
1453 }
1454
1455 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1456 {
1457     assert(!prop->defval);
1458     assert(!prop->init);
1459
1460     prop->defval = defval;
1461     prop->init = object_property_init_defval;
1462 }
1463
1464 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1465 {
1466     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1467 }
1468
1469 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1470 {
1471     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1472 }
1473
1474 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1475 {
1476     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1477 }
1478
1479 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1480 {
1481     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1482 }
1483
1484 void object_property_set_uint(Object *obj, uint64_t value,
1485                               const char *name, Error **errp)
1486 {
1487     QNum *qnum = qnum_from_uint(value);
1488
1489     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1490     qobject_unref(qnum);
1491 }
1492
1493 uint64_t object_property_get_uint(Object *obj, const char *name,
1494                                   Error **errp)
1495 {
1496     QObject *ret = object_property_get_qobject(obj, name, errp);
1497     QNum *qnum;
1498     uint64_t retval;
1499
1500     if (!ret) {
1501         return 0;
1502     }
1503     qnum = qobject_to(QNum, ret);
1504     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1505         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1506         retval = 0;
1507     }
1508
1509     qobject_unref(ret);
1510     return retval;
1511 }
1512
1513 typedef struct EnumProperty {
1514     const QEnumLookup *lookup;
1515     int (*get)(Object *, Error **);
1516     void (*set)(Object *, int, Error **);
1517 } EnumProperty;
1518
1519 int object_property_get_enum(Object *obj, const char *name,
1520                              const char *typename, Error **errp)
1521 {
1522     char *str;
1523     int ret;
1524     ObjectProperty *prop = object_property_find(obj, name, errp);
1525     EnumProperty *enumprop;
1526
1527     if (prop == NULL) {
1528         return 0;
1529     }
1530
1531     if (!g_str_equal(prop->type, typename)) {
1532         error_setg(errp, "Property %s on %s is not '%s' enum type",
1533                    name, object_class_get_name(
1534                        object_get_class(obj)), typename);
1535         return 0;
1536     }
1537
1538     enumprop = prop->opaque;
1539
1540     str = object_property_get_str(obj, name, errp);
1541     if (!str) {
1542         return 0;
1543     }
1544
1545     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1546     g_free(str);
1547
1548     return ret;
1549 }
1550
1551 void object_property_parse(Object *obj, const char *string,
1552                            const char *name, Error **errp)
1553 {
1554     Visitor *v = string_input_visitor_new(string);
1555     object_property_set(obj, v, name, errp);
1556     visit_free(v);
1557 }
1558
1559 char *object_property_print(Object *obj, const char *name, bool human,
1560                             Error **errp)
1561 {
1562     Visitor *v;
1563     char *string = NULL;
1564     Error *local_err = NULL;
1565
1566     v = string_output_visitor_new(human, &string);
1567     object_property_get(obj, v, name, &local_err);
1568     if (local_err) {
1569         error_propagate(errp, local_err);
1570         goto out;
1571     }
1572
1573     visit_complete(v, &string);
1574
1575 out:
1576     visit_free(v);
1577     return string;
1578 }
1579
1580 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1581 {
1582     ObjectProperty *prop = object_property_find(obj, name, errp);
1583     if (prop == NULL) {
1584         return NULL;
1585     }
1586
1587     return prop->type;
1588 }
1589
1590 Object *object_get_root(void)
1591 {
1592     static Object *root;
1593
1594     if (!root) {
1595         root = object_new("container");
1596     }
1597
1598     return root;
1599 }
1600
1601 Object *object_get_objects_root(void)
1602 {
1603     return container_get(object_get_root(), "/objects");
1604 }
1605
1606 Object *object_get_internal_root(void)
1607 {
1608     static Object *internal_root;
1609
1610     if (!internal_root) {
1611         internal_root = object_new("container");
1612     }
1613
1614     return internal_root;
1615 }
1616
1617 static void object_get_child_property(Object *obj, Visitor *v,
1618                                       const char *name, void *opaque,
1619                                       Error **errp)
1620 {
1621     Object *child = opaque;
1622     char *path;
1623
1624     path = object_get_canonical_path(child);
1625     visit_type_str(v, name, &path, errp);
1626     g_free(path);
1627 }
1628
1629 static Object *object_resolve_child_property(Object *parent, void *opaque,
1630                                              const char *part)
1631 {
1632     return opaque;
1633 }
1634
1635 static void object_finalize_child_property(Object *obj, const char *name,
1636                                            void *opaque)
1637 {
1638     Object *child = opaque;
1639
1640     if (child->class->unparent) {
1641         (child->class->unparent)(child);
1642     }
1643     child->parent = NULL;
1644     object_unref(child);
1645 }
1646
1647 ObjectProperty *
1648 object_property_add_child(Object *obj, const char *name,
1649                           Object *child)
1650 {
1651     g_autofree char *type = NULL;
1652     ObjectProperty *op;
1653
1654     assert(!child->parent);
1655
1656     type = g_strdup_printf("child<%s>", object_get_typename(child));
1657
1658     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1659                              object_finalize_child_property, child);
1660     op->resolve = object_resolve_child_property;
1661     object_ref(child);
1662     child->parent = obj;
1663     return op;
1664 }
1665
1666 void object_property_allow_set_link(const Object *obj, const char *name,
1667                                     Object *val, Error **errp)
1668 {
1669     /* Allow the link to be set, always */
1670 }
1671
1672 typedef struct {
1673     union {
1674         Object **targetp;
1675         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1676         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1677     };
1678     void (*check)(const Object *, const char *, Object *, Error **);
1679     ObjectPropertyLinkFlags flags;
1680 } LinkProperty;
1681
1682 static Object **
1683 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1684 {
1685     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1686         return &lprop->target;
1687     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1688         return (void *)obj + lprop->offset;
1689     } else {
1690         return lprop->targetp;
1691     }
1692 }
1693
1694 static void object_get_link_property(Object *obj, Visitor *v,
1695                                      const char *name, void *opaque,
1696                                      Error **errp)
1697 {
1698     LinkProperty *lprop = opaque;
1699     Object **targetp = object_link_get_targetp(obj, lprop);
1700     char *path;
1701
1702     if (*targetp) {
1703         path = object_get_canonical_path(*targetp);
1704         visit_type_str(v, name, &path, errp);
1705         g_free(path);
1706     } else {
1707         path = (char *)"";
1708         visit_type_str(v, name, &path, errp);
1709     }
1710 }
1711
1712 /*
1713  * object_resolve_link:
1714  *
1715  * Lookup an object and ensure its type matches the link property type.  This
1716  * is similar to object_resolve_path() except type verification against the
1717  * link property is performed.
1718  *
1719  * Returns: The matched object or NULL on path lookup failures.
1720  */
1721 static Object *object_resolve_link(Object *obj, const char *name,
1722                                    const char *path, Error **errp)
1723 {
1724     const char *type;
1725     char *target_type;
1726     bool ambiguous = false;
1727     Object *target;
1728
1729     /* Go from link<FOO> to FOO.  */
1730     type = object_property_get_type(obj, name, NULL);
1731     target_type = g_strndup(&type[5], strlen(type) - 6);
1732     target = object_resolve_path_type(path, target_type, &ambiguous);
1733
1734     if (ambiguous) {
1735         error_setg(errp, "Path '%s' does not uniquely identify an object",
1736                    path);
1737     } else if (!target) {
1738         target = object_resolve_path(path, &ambiguous);
1739         if (target || ambiguous) {
1740             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1741         } else {
1742             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1743                       "Device '%s' not found", path);
1744         }
1745         target = NULL;
1746     }
1747     g_free(target_type);
1748
1749     return target;
1750 }
1751
1752 static void object_set_link_property(Object *obj, Visitor *v,
1753                                      const char *name, void *opaque,
1754                                      Error **errp)
1755 {
1756     Error *local_err = NULL;
1757     LinkProperty *prop = opaque;
1758     Object **targetp = object_link_get_targetp(obj, prop);
1759     Object *old_target = *targetp;
1760     Object *new_target = NULL;
1761     char *path = NULL;
1762
1763     visit_type_str(v, name, &path, &local_err);
1764
1765     if (!local_err && strcmp(path, "") != 0) {
1766         new_target = object_resolve_link(obj, name, path, &local_err);
1767     }
1768
1769     g_free(path);
1770     if (local_err) {
1771         error_propagate(errp, local_err);
1772         return;
1773     }
1774
1775     prop->check(obj, name, new_target, &local_err);
1776     if (local_err) {
1777         error_propagate(errp, local_err);
1778         return;
1779     }
1780
1781     *targetp = new_target;
1782     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1783         object_ref(new_target);
1784         object_unref(old_target);
1785     }
1786 }
1787
1788 static Object *object_resolve_link_property(Object *parent, void *opaque,
1789                                             const char *part)
1790 {
1791     LinkProperty *lprop = opaque;
1792
1793     return *object_link_get_targetp(parent, lprop);
1794 }
1795
1796 static void object_release_link_property(Object *obj, const char *name,
1797                                          void *opaque)
1798 {
1799     LinkProperty *prop = opaque;
1800     Object **targetp = object_link_get_targetp(obj, prop);
1801
1802     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1803         object_unref(*targetp);
1804     }
1805     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1806         g_free(prop);
1807     }
1808 }
1809
1810 static ObjectProperty *
1811 object_add_link_prop(Object *obj, const char *name,
1812                      const char *type, void *ptr,
1813                      void (*check)(const Object *, const char *,
1814                                    Object *, Error **),
1815                      ObjectPropertyLinkFlags flags)
1816 {
1817     LinkProperty *prop = g_malloc(sizeof(*prop));
1818     g_autofree char *full_type = NULL;
1819     ObjectProperty *op;
1820
1821     if (flags & OBJ_PROP_LINK_DIRECT) {
1822         prop->target = ptr;
1823     } else {
1824         prop->targetp = ptr;
1825     }
1826     prop->check = check;
1827     prop->flags = flags;
1828
1829     full_type = g_strdup_printf("link<%s>", type);
1830
1831     op = object_property_add(obj, name, full_type,
1832                              object_get_link_property,
1833                              check ? object_set_link_property : NULL,
1834                              object_release_link_property,
1835                              prop);
1836     op->resolve = object_resolve_link_property;
1837     return op;
1838 }
1839
1840 ObjectProperty *
1841 object_property_add_link(Object *obj, const char *name,
1842                          const char *type, Object **targetp,
1843                          void (*check)(const Object *, const char *,
1844                                        Object *, Error **),
1845                          ObjectPropertyLinkFlags flags)
1846 {
1847     return object_add_link_prop(obj, name, type, targetp, check, flags);
1848 }
1849
1850 ObjectProperty *
1851 object_class_property_add_link(ObjectClass *oc,
1852     const char *name,
1853     const char *type, ptrdiff_t offset,
1854     void (*check)(const Object *obj, const char *name,
1855                   Object *val, Error **errp),
1856     ObjectPropertyLinkFlags flags)
1857 {
1858     LinkProperty *prop = g_new0(LinkProperty, 1);
1859     char *full_type;
1860     ObjectProperty *op;
1861
1862     prop->offset = offset;
1863     prop->check = check;
1864     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1865
1866     full_type = g_strdup_printf("link<%s>", type);
1867
1868     op = object_class_property_add(oc, name, full_type,
1869                                    object_get_link_property,
1870                                    check ? object_set_link_property : NULL,
1871                                    object_release_link_property,
1872                                    prop);
1873
1874     op->resolve = object_resolve_link_property;
1875
1876     g_free(full_type);
1877     return op;
1878 }
1879
1880 ObjectProperty *
1881 object_property_add_const_link(Object *obj, const char *name,
1882                                Object *target)
1883 {
1884     return object_add_link_prop(obj, name,
1885                                 object_get_typename(target), target,
1886                                 NULL, OBJ_PROP_LINK_DIRECT);
1887 }
1888
1889 char *object_get_canonical_path_component(Object *obj)
1890 {
1891     ObjectProperty *prop = NULL;
1892     GHashTableIter iter;
1893
1894     if (obj->parent == NULL) {
1895         return NULL;
1896     }
1897
1898     g_hash_table_iter_init(&iter, obj->parent->properties);
1899     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1900         if (!object_property_is_child(prop)) {
1901             continue;
1902         }
1903
1904         if (prop->opaque == obj) {
1905             return g_strdup(prop->name);
1906         }
1907     }
1908
1909     /* obj had a parent but was not a child, should never happen */
1910     g_assert_not_reached();
1911     return NULL;
1912 }
1913
1914 char *object_get_canonical_path(Object *obj)
1915 {
1916     Object *root = object_get_root();
1917     char *newpath, *path = NULL;
1918
1919     if (obj == root) {
1920         return g_strdup("/");
1921     }
1922
1923     do {
1924         char *component = object_get_canonical_path_component(obj);
1925
1926         if (!component) {
1927             /* A canonical path must be complete, so discard what was
1928              * collected so far.
1929              */
1930             g_free(path);
1931             return NULL;
1932         }
1933
1934         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1935         g_free(path);
1936         g_free(component);
1937         path = newpath;
1938         obj = obj->parent;
1939     } while (obj != root);
1940
1941     return path;
1942 }
1943
1944 Object *object_resolve_path_component(Object *parent, const char *part)
1945 {
1946     ObjectProperty *prop = object_property_find(parent, part, NULL);
1947     if (prop == NULL) {
1948         return NULL;
1949     }
1950
1951     if (prop->resolve) {
1952         return prop->resolve(parent, prop->opaque, part);
1953     } else {
1954         return NULL;
1955     }
1956 }
1957
1958 static Object *object_resolve_abs_path(Object *parent,
1959                                        char **parts,
1960                                        const char *typename,
1961                                        int index)
1962 {
1963     Object *child;
1964
1965     if (parts[index] == NULL) {
1966         return object_dynamic_cast(parent, typename);
1967     }
1968
1969     if (strcmp(parts[index], "") == 0) {
1970         return object_resolve_abs_path(parent, parts, typename, index + 1);
1971     }
1972
1973     child = object_resolve_path_component(parent, parts[index]);
1974     if (!child) {
1975         return NULL;
1976     }
1977
1978     return object_resolve_abs_path(child, parts, typename, index + 1);
1979 }
1980
1981 static Object *object_resolve_partial_path(Object *parent,
1982                                            char **parts,
1983                                            const char *typename,
1984                                            bool *ambiguous)
1985 {
1986     Object *obj;
1987     GHashTableIter iter;
1988     ObjectProperty *prop;
1989
1990     obj = object_resolve_abs_path(parent, parts, typename, 0);
1991
1992     g_hash_table_iter_init(&iter, parent->properties);
1993     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1994         Object *found;
1995
1996         if (!object_property_is_child(prop)) {
1997             continue;
1998         }
1999
2000         found = object_resolve_partial_path(prop->opaque, parts,
2001                                             typename, ambiguous);
2002         if (found) {
2003             if (obj) {
2004                 *ambiguous = true;
2005                 return NULL;
2006             }
2007             obj = found;
2008         }
2009
2010         if (*ambiguous) {
2011             return NULL;
2012         }
2013     }
2014
2015     return obj;
2016 }
2017
2018 Object *object_resolve_path_type(const char *path, const char *typename,
2019                                  bool *ambiguousp)
2020 {
2021     Object *obj;
2022     char **parts;
2023
2024     parts = g_strsplit(path, "/", 0);
2025     assert(parts);
2026
2027     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2028         bool ambiguous = false;
2029         obj = object_resolve_partial_path(object_get_root(), parts,
2030                                           typename, &ambiguous);
2031         if (ambiguousp) {
2032             *ambiguousp = ambiguous;
2033         }
2034     } else {
2035         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
2036     }
2037
2038     g_strfreev(parts);
2039
2040     return obj;
2041 }
2042
2043 Object *object_resolve_path(const char *path, bool *ambiguous)
2044 {
2045     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2046 }
2047
2048 typedef struct StringProperty
2049 {
2050     char *(*get)(Object *, Error **);
2051     void (*set)(Object *, const char *, Error **);
2052 } StringProperty;
2053
2054 static void property_get_str(Object *obj, Visitor *v, const char *name,
2055                              void *opaque, Error **errp)
2056 {
2057     StringProperty *prop = opaque;
2058     char *value;
2059     Error *err = NULL;
2060
2061     value = prop->get(obj, &err);
2062     if (err) {
2063         error_propagate(errp, err);
2064         return;
2065     }
2066
2067     visit_type_str(v, name, &value, errp);
2068     g_free(value);
2069 }
2070
2071 static void property_set_str(Object *obj, Visitor *v, const char *name,
2072                              void *opaque, Error **errp)
2073 {
2074     StringProperty *prop = opaque;
2075     char *value;
2076     Error *local_err = NULL;
2077
2078     visit_type_str(v, name, &value, &local_err);
2079     if (local_err) {
2080         error_propagate(errp, local_err);
2081         return;
2082     }
2083
2084     prop->set(obj, value, errp);
2085     g_free(value);
2086 }
2087
2088 static void property_release_str(Object *obj, const char *name,
2089                                  void *opaque)
2090 {
2091     StringProperty *prop = opaque;
2092     g_free(prop);
2093 }
2094
2095 ObjectProperty *
2096 object_property_add_str(Object *obj, const char *name,
2097                         char *(*get)(Object *, Error **),
2098                         void (*set)(Object *, const char *, Error **))
2099 {
2100     StringProperty *prop = g_malloc0(sizeof(*prop));
2101
2102     prop->get = get;
2103     prop->set = set;
2104
2105     return object_property_add(obj, name, "string",
2106                                get ? property_get_str : NULL,
2107                                set ? property_set_str : NULL,
2108                                property_release_str,
2109                                prop);
2110 }
2111
2112 ObjectProperty *
2113 object_class_property_add_str(ObjectClass *klass, const char *name,
2114                                    char *(*get)(Object *, Error **),
2115                                    void (*set)(Object *, const char *,
2116                                                Error **))
2117 {
2118     StringProperty *prop = g_malloc0(sizeof(*prop));
2119
2120     prop->get = get;
2121     prop->set = set;
2122
2123     return object_class_property_add(klass, name, "string",
2124                                      get ? property_get_str : NULL,
2125                                      set ? property_set_str : NULL,
2126                                      NULL,
2127                                      prop);
2128 }
2129
2130 typedef struct BoolProperty
2131 {
2132     bool (*get)(Object *, Error **);
2133     void (*set)(Object *, bool, Error **);
2134 } BoolProperty;
2135
2136 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2137                               void *opaque, Error **errp)
2138 {
2139     BoolProperty *prop = opaque;
2140     bool value;
2141     Error *err = NULL;
2142
2143     value = prop->get(obj, &err);
2144     if (err) {
2145         error_propagate(errp, err);
2146         return;
2147     }
2148
2149     visit_type_bool(v, name, &value, errp);
2150 }
2151
2152 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2153                               void *opaque, Error **errp)
2154 {
2155     BoolProperty *prop = opaque;
2156     bool value;
2157     Error *local_err = NULL;
2158
2159     visit_type_bool(v, name, &value, &local_err);
2160     if (local_err) {
2161         error_propagate(errp, local_err);
2162         return;
2163     }
2164
2165     prop->set(obj, value, errp);
2166 }
2167
2168 static void property_release_bool(Object *obj, const char *name,
2169                                   void *opaque)
2170 {
2171     BoolProperty *prop = opaque;
2172     g_free(prop);
2173 }
2174
2175 ObjectProperty *
2176 object_property_add_bool(Object *obj, const char *name,
2177                          bool (*get)(Object *, Error **),
2178                          void (*set)(Object *, bool, Error **))
2179 {
2180     BoolProperty *prop = g_malloc0(sizeof(*prop));
2181
2182     prop->get = get;
2183     prop->set = set;
2184
2185     return object_property_add(obj, name, "bool",
2186                                get ? property_get_bool : NULL,
2187                                set ? property_set_bool : NULL,
2188                                property_release_bool,
2189                                prop);
2190 }
2191
2192 ObjectProperty *
2193 object_class_property_add_bool(ObjectClass *klass, const char *name,
2194                                     bool (*get)(Object *, Error **),
2195                                     void (*set)(Object *, bool, Error **))
2196 {
2197     BoolProperty *prop = g_malloc0(sizeof(*prop));
2198
2199     prop->get = get;
2200     prop->set = set;
2201
2202     return object_class_property_add(klass, name, "bool",
2203                                      get ? property_get_bool : NULL,
2204                                      set ? property_set_bool : NULL,
2205                                      NULL,
2206                                      prop);
2207 }
2208
2209 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2210                               void *opaque, Error **errp)
2211 {
2212     EnumProperty *prop = opaque;
2213     int value;
2214     Error *err = NULL;
2215
2216     value = prop->get(obj, &err);
2217     if (err) {
2218         error_propagate(errp, err);
2219         return;
2220     }
2221
2222     visit_type_enum(v, name, &value, prop->lookup, errp);
2223 }
2224
2225 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2226                               void *opaque, Error **errp)
2227 {
2228     EnumProperty *prop = opaque;
2229     int value;
2230     Error *err = NULL;
2231
2232     visit_type_enum(v, name, &value, prop->lookup, &err);
2233     if (err) {
2234         error_propagate(errp, err);
2235         return;
2236     }
2237     prop->set(obj, value, errp);
2238 }
2239
2240 static void property_release_enum(Object *obj, const char *name,
2241                                   void *opaque)
2242 {
2243     EnumProperty *prop = opaque;
2244     g_free(prop);
2245 }
2246
2247 ObjectProperty *
2248 object_property_add_enum(Object *obj, const char *name,
2249                          const char *typename,
2250                          const QEnumLookup *lookup,
2251                          int (*get)(Object *, Error **),
2252                          void (*set)(Object *, int, Error **))
2253 {
2254     EnumProperty *prop = g_malloc(sizeof(*prop));
2255
2256     prop->lookup = lookup;
2257     prop->get = get;
2258     prop->set = set;
2259
2260     return object_property_add(obj, name, typename,
2261                                get ? property_get_enum : NULL,
2262                                set ? property_set_enum : NULL,
2263                                property_release_enum,
2264                                prop);
2265 }
2266
2267 ObjectProperty *
2268 object_class_property_add_enum(ObjectClass *klass, const char *name,
2269                                     const char *typename,
2270                                     const QEnumLookup *lookup,
2271                                     int (*get)(Object *, Error **),
2272                                     void (*set)(Object *, int, Error **))
2273 {
2274     EnumProperty *prop = g_malloc(sizeof(*prop));
2275
2276     prop->lookup = lookup;
2277     prop->get = get;
2278     prop->set = set;
2279
2280     return object_class_property_add(klass, name, typename,
2281                                      get ? property_get_enum : NULL,
2282                                      set ? property_set_enum : NULL,
2283                                      NULL,
2284                                      prop);
2285 }
2286
2287 typedef struct TMProperty {
2288     void (*get)(Object *, struct tm *, Error **);
2289 } TMProperty;
2290
2291 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2292                             void *opaque, Error **errp)
2293 {
2294     TMProperty *prop = opaque;
2295     Error *err = NULL;
2296     struct tm value;
2297
2298     prop->get(obj, &value, &err);
2299     if (err) {
2300         goto out;
2301     }
2302
2303     visit_start_struct(v, name, NULL, 0, &err);
2304     if (err) {
2305         goto out;
2306     }
2307     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2308     if (err) {
2309         goto out_end;
2310     }
2311     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2312     if (err) {
2313         goto out_end;
2314     }
2315     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2316     if (err) {
2317         goto out_end;
2318     }
2319     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2320     if (err) {
2321         goto out_end;
2322     }
2323     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2324     if (err) {
2325         goto out_end;
2326     }
2327     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2328     if (err) {
2329         goto out_end;
2330     }
2331     visit_check_struct(v, &err);
2332 out_end:
2333     visit_end_struct(v, NULL);
2334 out:
2335     error_propagate(errp, err);
2336
2337 }
2338
2339 static void property_release_tm(Object *obj, const char *name,
2340                                 void *opaque)
2341 {
2342     TMProperty *prop = opaque;
2343     g_free(prop);
2344 }
2345
2346 ObjectProperty *
2347 object_property_add_tm(Object *obj, const char *name,
2348                        void (*get)(Object *, struct tm *, Error **))
2349 {
2350     TMProperty *prop = g_malloc0(sizeof(*prop));
2351
2352     prop->get = get;
2353
2354     return object_property_add(obj, name, "struct tm",
2355                                get ? property_get_tm : NULL, NULL,
2356                                property_release_tm,
2357                                prop);
2358 }
2359
2360 ObjectProperty *
2361 object_class_property_add_tm(ObjectClass *klass, const char *name,
2362                              void (*get)(Object *, struct tm *, Error **))
2363 {
2364     TMProperty *prop = g_malloc0(sizeof(*prop));
2365
2366     prop->get = get;
2367
2368     return object_class_property_add(klass, name, "struct tm",
2369                                      get ? property_get_tm : NULL,
2370                                      NULL, NULL, prop);
2371 }
2372
2373 static char *qdev_get_type(Object *obj, Error **errp)
2374 {
2375     return g_strdup(object_get_typename(obj));
2376 }
2377
2378 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2379                                    void *opaque, Error **errp)
2380 {
2381     uint8_t value = *(uint8_t *)opaque;
2382     visit_type_uint8(v, name, &value, errp);
2383 }
2384
2385 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2386                                    void *opaque, Error **errp)
2387 {
2388     uint8_t *field = opaque;
2389     uint8_t value;
2390     Error *local_err = NULL;
2391
2392     visit_type_uint8(v, name, &value, &local_err);
2393     if (local_err) {
2394         error_propagate(errp, local_err);
2395         return;
2396     }
2397
2398     *field = value;
2399 }
2400
2401 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2402                                     void *opaque, Error **errp)
2403 {
2404     uint16_t value = *(uint16_t *)opaque;
2405     visit_type_uint16(v, name, &value, errp);
2406 }
2407
2408 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2409                                     void *opaque, Error **errp)
2410 {
2411     uint16_t *field = opaque;
2412     uint16_t value;
2413     Error *local_err = NULL;
2414
2415     visit_type_uint16(v, name, &value, &local_err);
2416     if (local_err) {
2417         error_propagate(errp, local_err);
2418         return;
2419     }
2420
2421     *field = value;
2422 }
2423
2424 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2425                                     void *opaque, Error **errp)
2426 {
2427     uint32_t value = *(uint32_t *)opaque;
2428     visit_type_uint32(v, name, &value, errp);
2429 }
2430
2431 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2432                                     void *opaque, Error **errp)
2433 {
2434     uint32_t *field = opaque;
2435     uint32_t value;
2436     Error *local_err = NULL;
2437
2438     visit_type_uint32(v, name, &value, &local_err);
2439     if (local_err) {
2440         error_propagate(errp, local_err);
2441         return;
2442     }
2443
2444     *field = value;
2445 }
2446
2447 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2448                                     void *opaque, Error **errp)
2449 {
2450     uint64_t value = *(uint64_t *)opaque;
2451     visit_type_uint64(v, name, &value, errp);
2452 }
2453
2454 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2455                                     void *opaque, Error **errp)
2456 {
2457     uint64_t *field = opaque;
2458     uint64_t value;
2459     Error *local_err = NULL;
2460
2461     visit_type_uint64(v, name, &value, &local_err);
2462     if (local_err) {
2463         error_propagate(errp, local_err);
2464         return;
2465     }
2466
2467     *field = value;
2468 }
2469
2470 ObjectProperty *
2471 object_property_add_uint8_ptr(Object *obj, const char *name,
2472                               const uint8_t *v,
2473                               ObjectPropertyFlags flags)
2474 {
2475     ObjectPropertyAccessor *getter = NULL;
2476     ObjectPropertyAccessor *setter = NULL;
2477
2478     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2479         getter = property_get_uint8_ptr;
2480     }
2481
2482     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2483         setter = property_set_uint8_ptr;
2484     }
2485
2486     return object_property_add(obj, name, "uint8",
2487                                getter, setter, NULL, (void *)v);
2488 }
2489
2490 ObjectProperty *
2491 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2492                                     const uint8_t *v,
2493                                     ObjectPropertyFlags flags)
2494 {
2495     ObjectPropertyAccessor *getter = NULL;
2496     ObjectPropertyAccessor *setter = NULL;
2497
2498     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2499         getter = property_get_uint8_ptr;
2500     }
2501
2502     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2503         setter = property_set_uint8_ptr;
2504     }
2505
2506     return object_class_property_add(klass, name, "uint8",
2507                                      getter, setter, NULL, (void *)v);
2508 }
2509
2510 ObjectProperty *
2511 object_property_add_uint16_ptr(Object *obj, const char *name,
2512                                const uint16_t *v,
2513                                ObjectPropertyFlags flags)
2514 {
2515     ObjectPropertyAccessor *getter = NULL;
2516     ObjectPropertyAccessor *setter = NULL;
2517
2518     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2519         getter = property_get_uint16_ptr;
2520     }
2521
2522     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2523         setter = property_set_uint16_ptr;
2524     }
2525
2526     return object_property_add(obj, name, "uint16",
2527                                getter, setter, NULL, (void *)v);
2528 }
2529
2530 ObjectProperty *
2531 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2532                                      const uint16_t *v,
2533                                      ObjectPropertyFlags flags)
2534 {
2535     ObjectPropertyAccessor *getter = NULL;
2536     ObjectPropertyAccessor *setter = NULL;
2537
2538     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2539         getter = property_get_uint16_ptr;
2540     }
2541
2542     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2543         setter = property_set_uint16_ptr;
2544     }
2545
2546     return object_class_property_add(klass, name, "uint16",
2547                                      getter, setter, NULL, (void *)v);
2548 }
2549
2550 ObjectProperty *
2551 object_property_add_uint32_ptr(Object *obj, const char *name,
2552                                const uint32_t *v,
2553                                ObjectPropertyFlags flags)
2554 {
2555     ObjectPropertyAccessor *getter = NULL;
2556     ObjectPropertyAccessor *setter = NULL;
2557
2558     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2559         getter = property_get_uint32_ptr;
2560     }
2561
2562     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2563         setter = property_set_uint32_ptr;
2564     }
2565
2566     return object_property_add(obj, name, "uint32",
2567                                getter, setter, NULL, (void *)v);
2568 }
2569
2570 ObjectProperty *
2571 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2572                                      const uint32_t *v,
2573                                      ObjectPropertyFlags flags)
2574 {
2575     ObjectPropertyAccessor *getter = NULL;
2576     ObjectPropertyAccessor *setter = NULL;
2577
2578     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2579         getter = property_get_uint32_ptr;
2580     }
2581
2582     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2583         setter = property_set_uint32_ptr;
2584     }
2585
2586     return object_class_property_add(klass, name, "uint32",
2587                                      getter, setter, NULL, (void *)v);
2588 }
2589
2590 ObjectProperty *
2591 object_property_add_uint64_ptr(Object *obj, const char *name,
2592                                const uint64_t *v,
2593                                ObjectPropertyFlags flags)
2594 {
2595     ObjectPropertyAccessor *getter = NULL;
2596     ObjectPropertyAccessor *setter = NULL;
2597
2598     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2599         getter = property_get_uint64_ptr;
2600     }
2601
2602     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2603         setter = property_set_uint64_ptr;
2604     }
2605
2606     return object_property_add(obj, name, "uint64",
2607                                getter, setter, NULL, (void *)v);
2608 }
2609
2610 ObjectProperty *
2611 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2612                                      const uint64_t *v,
2613                                      ObjectPropertyFlags flags)
2614 {
2615     ObjectPropertyAccessor *getter = NULL;
2616     ObjectPropertyAccessor *setter = NULL;
2617
2618     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2619         getter = property_get_uint64_ptr;
2620     }
2621
2622     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2623         setter = property_set_uint64_ptr;
2624     }
2625
2626     return object_class_property_add(klass, name, "uint64",
2627                                      getter, setter, NULL, (void *)v);
2628 }
2629
2630 typedef struct {
2631     Object *target_obj;
2632     char *target_name;
2633 } AliasProperty;
2634
2635 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2636                                void *opaque, Error **errp)
2637 {
2638     AliasProperty *prop = opaque;
2639
2640     object_property_get(prop->target_obj, v, prop->target_name, errp);
2641 }
2642
2643 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2644                                void *opaque, Error **errp)
2645 {
2646     AliasProperty *prop = opaque;
2647
2648     object_property_set(prop->target_obj, v, prop->target_name, errp);
2649 }
2650
2651 static Object *property_resolve_alias(Object *obj, void *opaque,
2652                                       const char *part)
2653 {
2654     AliasProperty *prop = opaque;
2655
2656     return object_resolve_path_component(prop->target_obj, prop->target_name);
2657 }
2658
2659 static void property_release_alias(Object *obj, const char *name, void *opaque)
2660 {
2661     AliasProperty *prop = opaque;
2662
2663     g_free(prop->target_name);
2664     g_free(prop);
2665 }
2666
2667 ObjectProperty *
2668 object_property_add_alias(Object *obj, const char *name,
2669                           Object *target_obj, const char *target_name)
2670 {
2671     AliasProperty *prop;
2672     ObjectProperty *op;
2673     ObjectProperty *target_prop;
2674     g_autofree char *prop_type = NULL;
2675
2676     target_prop = object_property_find(target_obj, target_name,
2677                                        &error_abort);
2678
2679     if (object_property_is_child(target_prop)) {
2680         prop_type = g_strdup_printf("link%s",
2681                                     target_prop->type + strlen("child"));
2682     } else {
2683         prop_type = g_strdup(target_prop->type);
2684     }
2685
2686     prop = g_malloc(sizeof(*prop));
2687     prop->target_obj = target_obj;
2688     prop->target_name = g_strdup(target_name);
2689
2690     op = object_property_add(obj, name, prop_type,
2691                              property_get_alias,
2692                              property_set_alias,
2693                              property_release_alias,
2694                              prop);
2695     op->resolve = property_resolve_alias;
2696     if (target_prop->defval) {
2697         op->defval = qobject_ref(target_prop->defval);
2698     }
2699
2700     object_property_set_description(obj, op->name,
2701                                     target_prop->description);
2702     return op;
2703 }
2704
2705 void object_property_set_description(Object *obj, const char *name,
2706                                      const char *description)
2707 {
2708     ObjectProperty *op;
2709
2710     op = object_property_find(obj, name, &error_abort);
2711     g_free(op->description);
2712     op->description = g_strdup(description);
2713 }
2714
2715 void object_class_property_set_description(ObjectClass *klass,
2716                                            const char *name,
2717                                            const char *description)
2718 {
2719     ObjectProperty *op;
2720
2721     op = g_hash_table_lookup(klass->properties, name);
2722     g_free(op->description);
2723     op->description = g_strdup(description);
2724 }
2725
2726 static void object_class_init(ObjectClass *klass, void *data)
2727 {
2728     object_class_property_add_str(klass, "type", qdev_get_type,
2729                                   NULL);
2730 }
2731
2732 static void register_types(void)
2733 {
2734     static TypeInfo interface_info = {
2735         .name = TYPE_INTERFACE,
2736         .class_size = sizeof(InterfaceClass),
2737         .abstract = true,
2738     };
2739
2740     static TypeInfo object_info = {
2741         .name = TYPE_OBJECT,
2742         .instance_size = sizeof(Object),
2743         .class_init = object_class_init,
2744         .abstract = true,
2745     };
2746
2747     type_interface = type_register_internal(&interface_info);
2748     type_register_internal(&object_info);
2749 }
2750
2751 type_init(register_types)