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, &local_err);
 561     if (local_err) {
 562         goto out;
 563     }
 564
 565     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 566     if (uc) {
 567         user_creatable_complete(uc, &local_err);
 568         if (local_err) {
 569             object_unparent(obj);
 570             goto out;
 571         }
 572     }
 573
 574 out:
 575     /*
 576      * We want @obj's reference to be 1 on success, 0 on failure.
 577      * On success, it's 2: one taken by object_initialize(), and one
 578      * by object_property_add_child().
 579      * On failure in object_initialize() or earlier, it's 1.
 580      * On failure afterwards, it's also 1: object_unparent() releases
 581      * the reference taken by object_property_add_child().
 582      */
 583     object_unref(obj);
 584
 585     error_propagate(errp, local_err);
 586 }
 587
 588 static inline bool object_property_is_child(ObjectProperty *prop)
 589 {
 590     return strstart(prop->type, "child<", NULL);
 591 }
 592
 593 static void object_property_del_all(Object *obj)
 594 {
 595     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 596     ObjectProperty *prop;
 597     ObjectPropertyIterator iter;
 598     bool released;
 599
 600     do {
 601         released = false;
 602         object_property_iter_init(&iter, obj);
 603         while ((prop = object_property_iter_next(&iter)) != NULL) {
 604             if (g_hash_table_add(done, prop)) {
 605                 if (prop->release) {
 606                     prop->release(obj, prop->name, prop->opaque);
 607                     released = true;
 608                     break;
 609                 }
 610             }
 611         }
 612     } while (released);
 613
 614     g_hash_table_unref(obj->properties);
 615 }
 616
 617 static void object_property_del_child(Object *obj, Object *child)
 618 {
 619     ObjectProperty *prop;
 620     GHashTableIter iter;
 621     gpointer key, value;
 622
 623     g_hash_table_iter_init(&iter, obj->properties);
 624     while (g_hash_table_iter_next(&iter, &key, &value)) {
 625         prop = value;
 626         if (object_property_is_child(prop) && prop->opaque == child) {
 627             if (prop->release) {
 628                 prop->release(obj, prop->name, prop->opaque);
 629                 prop->release = NULL;
 630             }
 631             break;
 632         }
 633     }
 634     g_hash_table_iter_init(&iter, obj->properties);
 635     while (g_hash_table_iter_next(&iter, &key, &value)) {
 636         prop = value;
 637         if (object_property_is_child(prop) && prop->opaque == child) {
 638             g_hash_table_iter_remove(&iter);
 639             break;
 640         }
 641     }
 642 }
 643
 644 void object_unparent(Object *obj)
 645 {
 646     if (obj->parent) {
 647         object_property_del_child(obj->parent, obj);
 648     }
 649 }
 650
 651 static void object_deinit(Object *obj, TypeImpl *type)
 652 {
 653     if (type->instance_finalize) {
 654         type->instance_finalize(obj);
 655     }
 656
 657     if (type_has_parent(type)) {
 658         object_deinit(obj, type_get_parent(type));
 659     }
 660 }
 661
 662 static void object_finalize(void *data)
 663 {
 664     Object *obj = data;
 665     TypeImpl *ti = obj->class->type;
 666
 667     object_property_del_all(obj);
 668     object_deinit(obj, ti);
 669
 670     g_assert(obj->ref == 0);
 671     if (obj->free) {
 672         obj->free(obj);
 673     }
 674 }
 675
 676 static Object *object_new_with_type(Type type)
 677 {
 678     Object *obj;
 679
 680     g_assert(type != NULL);
 681     type_initialize(type);
 682
 683     obj = g_malloc(type->instance_size);
 684     object_initialize_with_type(obj, type->instance_size, type);
 685     obj->free = g_free;
 686
 687     return obj;
 688 }
 689
 690 Object *object_new_with_class(ObjectClass *klass)
 691 {
 692     return object_new_with_type(klass->type);
 693 }
 694
 695 Object *object_new(const char *typename)
 696 {
 697     TypeImpl *ti = type_get_by_name(typename);
 698
 699     return object_new_with_type(ti);
 700 }
 701
 702
 703 Object *object_new_with_props(const char *typename,
 704                               Object *parent,
 705                               const char *id,
 706                               Error **errp,
 707                               ...)
 708 {
 709     va_list vargs;
 710     Object *obj;
 711
 712     va_start(vargs, errp);
 713     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 714     va_end(vargs);
 715
 716     return obj;
 717 }
 718
 719
 720 Object *object_new_with_propv(const char *typename,
 721                               Object *parent,
 722                               const char *id,
 723                               Error **errp,
 724                               va_list vargs)
 725 {
 726     Object *obj;
 727     ObjectClass *klass;
 728     Error *local_err = NULL;
 729     UserCreatable *uc;
 730
 731     klass = object_class_by_name(typename);
 732     if (!klass) {
 733         error_setg(errp, "invalid object type: %s", typename);
 734         return NULL;
 735     }
 736
 737     if (object_class_is_abstract(klass)) {
 738         error_setg(errp, "object type '%s' is abstract", typename);
 739         return NULL;
 740     }
 741     obj = object_new_with_type(klass->type);
 742
 743     if (object_set_propv(obj, &local_err, vargs) < 0) {
 744         goto error;
 745     }
 746
 747     if (id != NULL) {
 748         object_property_add_child(parent, id, obj, &local_err);
 749         if (local_err) {
 750             goto error;
 751         }
 752     }
 753
 754     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 755     if (uc) {
 756         user_creatable_complete(uc, &local_err);
 757         if (local_err) {
 758             if (id != NULL) {
 759                 object_unparent(obj);
 760             }
 761             goto error;
 762         }
 763     }
 764
 765     object_unref(OBJECT(obj));
 766     return obj;
 767
 768  error:
 769     error_propagate(errp, local_err);
 770     object_unref(obj);
 771     return NULL;
 772 }
 773
 774
 775 int object_set_props(Object *obj,
 776                      Error **errp,
 777                      ...)
 778 {
 779     va_list vargs;
 780     int ret;
 781
 782     va_start(vargs, errp);
 783     ret = object_set_propv(obj, errp, vargs);
 784     va_end(vargs);
 785
 786     return ret;
 787 }
 788
 789
 790 int object_set_propv(Object *obj,
 791                      Error **errp,
 792                      va_list vargs)
 793 {
 794     const char *propname;
 795     Error *local_err = NULL;
 796
 797     propname = va_arg(vargs, char *);
 798     while (propname != NULL) {
 799         const char *value = va_arg(vargs, char *);
 800
 801         g_assert(value != NULL);
 802         object_property_parse(obj, value, propname, &local_err);
 803         if (local_err) {
 804             error_propagate(errp, local_err);
 805             return -1;
 806         }
 807         propname = va_arg(vargs, char *);
 808     }
 809
 810     return 0;
 811 }
 812
 813
 814 Object *object_dynamic_cast(Object *obj, const char *typename)
 815 {
 816     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 817         return obj;
 818     }
 819
 820     return NULL;
 821 }
 822
 823 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 824                                    const char *file, int line, const char *func)
 825 {
 826     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 827                                      typename, file, line, func);
 828
 829 #ifdef CONFIG_QOM_CAST_DEBUG
 830     int i;
 831     Object *inst;
 832
 833     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 834         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 835             goto out;
 836         }
 837     }
 838
 839     inst = object_dynamic_cast(obj, typename);
 840
 841     if (!inst && obj) {
 842         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 843                 file, line, func, obj, typename);
 844         abort();
 845     }
 846
 847     assert(obj == inst);
 848
 849     if (obj && obj == inst) {
 850         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 851             atomic_set(&obj->class->object_cast_cache[i - 1],
 852                        atomic_read(&obj->class->object_cast_cache[i]));
 853         }
 854         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 855     }
 856
 857 out:
 858 #endif
 859     return obj;
 860 }
 861
 862 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 863                                        const char *typename)
 864 {
 865     ObjectClass *ret = NULL;
 866     TypeImpl *target_type;
 867     TypeImpl *type;
 868
 869     if (!class) {
 870         return NULL;
 871     }
 872
 873     /* A simple fast path that can trigger a lot for leaf classes.  */
 874     type = class->type;
 875     if (type->name == typename) {
 876         return class;
 877     }
 878
 879     target_type = type_get_by_name(typename);
 880     if (!target_type) {
 881         /* target class type unknown, so fail the cast */
 882         return NULL;
 883     }
 884
 885     if (type->class->interfaces &&
 886             type_is_ancestor(target_type, type_interface)) {
 887         int found = 0;
 888         GSList *i;
 889
 890         for (i = class->interfaces; i; i = i->next) {
 891             ObjectClass *target_class = i->data;
 892
 893             if (type_is_ancestor(target_class->type, target_type)) {
 894                 ret = target_class;
 895                 found++;
 896             }
 897          }
 898
 899         /* The match was ambiguous, don't allow a cast */
 900         if (found > 1) {
 901             ret = NULL;
 902         }
 903     } else if (type_is_ancestor(type, target_type)) {
 904         ret = class;
 905     }
 906
 907     return ret;
 908 }
 909
 910 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 911                                               const char *typename,
 912                                               const char *file, int line,
 913                                               const char *func)
 914 {
 915     ObjectClass *ret;
 916
 917     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 918                                            typename, file, line, func);
 919
 920 #ifdef CONFIG_QOM_CAST_DEBUG
 921     int i;
 922
 923     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 924         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 925             ret = class;
 926             goto out;
 927         }
 928     }
 929 #else
 930     if (!class || !class->interfaces) {
 931         return class;
 932     }
 933 #endif
 934
 935     ret = object_class_dynamic_cast(class, typename);
 936     if (!ret && class) {
 937         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 938                 file, line, func, class, typename);
 939         abort();
 940     }
 941
 942 #ifdef CONFIG_QOM_CAST_DEBUG
 943     if (class && ret == class) {
 944         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 945             atomic_set(&class->class_cast_cache[i - 1],
 946                        atomic_read(&class->class_cast_cache[i]));
 947         }
 948         atomic_set(&class->class_cast_cache[i - 1], typename);
 949     }
 950 out:
 951 #endif
 952     return ret;
 953 }
 954
 955 const char *object_get_typename(const Object *obj)
 956 {
 957     return obj->class->type->name;
 958 }
 959
 960 ObjectClass *object_get_class(Object *obj)
 961 {
 962     return obj->class;
 963 }
 964
 965 bool object_class_is_abstract(ObjectClass *klass)
 966 {
 967     return klass->type->abstract;
 968 }
 969
 970 const char *object_class_get_name(ObjectClass *klass)
 971 {
 972     return klass->type->name;
 973 }
 974
 975 ObjectClass *object_class_by_name(const char *typename)
 976 {
 977     TypeImpl *type = type_get_by_name(typename);
 978
 979     if (!type) {
 980         return NULL;
 981     }
 982
 983     type_initialize(type);
 984
 985     return type->class;
 986 }
 987
 988 ObjectClass *object_class_get_parent(ObjectClass *class)
 989 {
 990     TypeImpl *type = type_get_parent(class->type);
 991
 992     if (!type) {
 993         return NULL;
 994     }
 995
 996     type_initialize(type);
 997
 998     return type->class;
 999 }
1000
1001 typedef struct OCFData
1002 {
1003     void (*fn)(ObjectClass *klass, void *opaque);
1004     const char *implements_type;
1005     bool include_abstract;
1006     void *opaque;
1007 } OCFData;
1008
1009 static void object_class_foreach_tramp(gpointer key, gpointer value,
1010                                        gpointer opaque)
1011 {
1012     OCFData *data = opaque;
1013     TypeImpl *type = value;
1014     ObjectClass *k;
1015
1016     type_initialize(type);
1017     k = type->class;
1018
1019     if (!data->include_abstract && type->abstract) {
1020         return;
1021     }
1022
1023     if (data->implements_type &&
1024         !object_class_dynamic_cast(k, data->implements_type)) {
1025         return;
1026     }
1027
1028     data->fn(k, data->opaque);
1029 }
1030
1031 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1032                           const char *implements_type, bool include_abstract,
1033                           void *opaque)
1034 {
1035     OCFData data = { fn, implements_type, include_abstract, opaque };
1036
1037     enumerating_types = true;
1038     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1039     enumerating_types = false;
1040 }
1041
1042 static int do_object_child_foreach(Object *obj,
1043                                    int (*fn)(Object *child, void *opaque),
1044                                    void *opaque, bool recurse)
1045 {
1046     GHashTableIter iter;
1047     ObjectProperty *prop;
1048     int ret = 0;
1049
1050     g_hash_table_iter_init(&iter, obj->properties);
1051     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1052         if (object_property_is_child(prop)) {
1053             Object *child = prop->opaque;
1054
1055             ret = fn(child, opaque);
1056             if (ret != 0) {
1057                 break;
1058             }
1059             if (recurse) {
1060                 do_object_child_foreach(child, fn, opaque, true);
1061             }
1062         }
1063     }
1064     return ret;
1065 }
1066
1067 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1068                          void *opaque)
1069 {
1070     return do_object_child_foreach(obj, fn, opaque, false);
1071 }
1072
1073 int object_child_foreach_recursive(Object *obj,
1074                                    int (*fn)(Object *child, void *opaque),
1075                                    void *opaque)
1076 {
1077     return do_object_child_foreach(obj, fn, opaque, true);
1078 }
1079
1080 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1081 {
1082     GSList **list = opaque;
1083
1084     *list = g_slist_prepend(*list, klass);
1085 }
1086
1087 GSList *object_class_get_list(const char *implements_type,
1088                               bool include_abstract)
1089 {
1090     GSList *list = NULL;
1091
1092     object_class_foreach(object_class_get_list_tramp,
1093                          implements_type, include_abstract, &list);
1094     return list;
1095 }
1096
1097 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1098 {
1099     return strcasecmp(object_class_get_name((ObjectClass *)a),
1100                       object_class_get_name((ObjectClass *)b));
1101 }
1102
1103 GSList *object_class_get_list_sorted(const char *implements_type,
1104                                      bool include_abstract)
1105 {
1106     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1107                         object_class_cmp);
1108 }
1109
1110 Object *object_ref(Object *obj)
1111 {
1112     if (!obj) {
1113         return NULL;
1114     }
1115     atomic_inc(&obj->ref);
1116     return obj;
1117 }
1118
1119 void object_unref(Object *obj)
1120 {
1121     if (!obj) {
1122         return;
1123     }
1124     g_assert(obj->ref > 0);
1125
1126     /* parent always holds a reference to its children */
1127     if (atomic_fetch_dec(&obj->ref) == 1) {
1128         object_finalize(obj);
1129     }
1130 }
1131
1132 ObjectProperty *
1133 object_property_add(Object *obj, const char *name, const char *type,
1134                     ObjectPropertyAccessor *get,
1135                     ObjectPropertyAccessor *set,
1136                     ObjectPropertyRelease *release,
1137                     void *opaque, Error **errp)
1138 {
1139     ObjectProperty *prop;
1140     size_t name_len = strlen(name);
1141
1142     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1143         int i;
1144         ObjectProperty *ret;
1145         char *name_no_array = g_strdup(name);
1146
1147         name_no_array[name_len - 3] = '\0';
1148         for (i = 0; ; ++i) {
1149             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1150
1151             ret = object_property_add(obj, full_name, type, get, set,
1152                                       release, opaque, NULL);
1153             g_free(full_name);
1154             if (ret) {
1155                 break;
1156             }
1157         }
1158         g_free(name_no_array);
1159         return ret;
1160     }
1161
1162     if (object_property_find(obj, name, NULL) != NULL) {
1163         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1164                    name, object_get_typename(obj));
1165         return NULL;
1166     }
1167
1168     prop = g_malloc0(sizeof(*prop));
1169
1170     prop->name = g_strdup(name);
1171     prop->type = g_strdup(type);
1172
1173     prop->get = get;
1174     prop->set = set;
1175     prop->release = release;
1176     prop->opaque = opaque;
1177
1178     g_hash_table_insert(obj->properties, prop->name, prop);
1179     return prop;
1180 }
1181
1182 ObjectProperty *
1183 object_class_property_add(ObjectClass *klass,
1184                           const char *name,
1185                           const char *type,
1186                           ObjectPropertyAccessor *get,
1187                           ObjectPropertyAccessor *set,
1188                           ObjectPropertyRelease *release,
1189                           void *opaque,
1190                           Error **errp)
1191 {
1192     ObjectProperty *prop;
1193
1194     if (object_class_property_find(klass, name, NULL) != NULL) {
1195         error_setg(errp, "attempt to add duplicate property '%s' to class (type '%s')",
1196                    name, object_class_get_name(klass));
1197         return NULL;
1198     }
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, Error **errp)
1284 {
1285     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1286
1287     if (!prop) {
1288         error_setg(errp, "Property '.%s' not found", name);
1289         return;
1290     }
1291
1292     if (prop->release) {
1293         prop->release(obj, name, prop->opaque);
1294     }
1295     g_hash_table_remove(obj->properties, name);
1296 }
1297
1298 void object_property_get(Object *obj, Visitor *v, const char *name,
1299                          Error **errp)
1300 {
1301     ObjectProperty *prop = object_property_find(obj, name, errp);
1302     if (prop == NULL) {
1303         return;
1304     }
1305
1306     if (!prop->get) {
1307         error_setg(errp, QERR_PERMISSION_DENIED);
1308     } else {
1309         prop->get(obj, v, name, prop->opaque, errp);
1310     }
1311 }
1312
1313 void object_property_set(Object *obj, Visitor *v, const char *name,
1314                          Error **errp)
1315 {
1316     ObjectProperty *prop = object_property_find(obj, name, errp);
1317     if (prop == NULL) {
1318         return;
1319     }
1320
1321     if (!prop->set) {
1322         error_setg(errp, QERR_PERMISSION_DENIED);
1323     } else {
1324         prop->set(obj, v, name, prop->opaque, errp);
1325     }
1326 }
1327
1328 void object_property_set_str(Object *obj, const char *value,
1329                              const char *name, Error **errp)
1330 {
1331     QString *qstr = qstring_from_str(value);
1332     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1333
1334     qobject_unref(qstr);
1335 }
1336
1337 char *object_property_get_str(Object *obj, const char *name,
1338                               Error **errp)
1339 {
1340     QObject *ret = object_property_get_qobject(obj, name, errp);
1341     char *retval;
1342
1343     if (!ret) {
1344         return NULL;
1345     }
1346
1347     retval = g_strdup(qobject_get_try_str(ret));
1348     if (!retval) {
1349         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1350     }
1351
1352     qobject_unref(ret);
1353     return retval;
1354 }
1355
1356 void object_property_set_link(Object *obj, Object *value,
1357                               const char *name, Error **errp)
1358 {
1359     if (value) {
1360         char *path = object_get_canonical_path(value);
1361         object_property_set_str(obj, path, name, errp);
1362         g_free(path);
1363     } else {
1364         object_property_set_str(obj, "", name, errp);
1365     }
1366 }
1367
1368 Object *object_property_get_link(Object *obj, const char *name,
1369                                  Error **errp)
1370 {
1371     char *str = object_property_get_str(obj, name, errp);
1372     Object *target = NULL;
1373
1374     if (str && *str) {
1375         target = object_resolve_path(str, NULL);
1376         if (!target) {
1377             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1378                       "Device '%s' not found", str);
1379         }
1380     }
1381
1382     g_free(str);
1383     return target;
1384 }
1385
1386 void object_property_set_bool(Object *obj, bool value,
1387                               const char *name, Error **errp)
1388 {
1389     QBool *qbool = qbool_from_bool(value);
1390     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1391
1392     qobject_unref(qbool);
1393 }
1394
1395 bool object_property_get_bool(Object *obj, const char *name,
1396                               Error **errp)
1397 {
1398     QObject *ret = object_property_get_qobject(obj, name, errp);
1399     QBool *qbool;
1400     bool retval;
1401
1402     if (!ret) {
1403         return false;
1404     }
1405     qbool = qobject_to(QBool, ret);
1406     if (!qbool) {
1407         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1408         retval = false;
1409     } else {
1410         retval = qbool_get_bool(qbool);
1411     }
1412
1413     qobject_unref(ret);
1414     return retval;
1415 }
1416
1417 void object_property_set_int(Object *obj, int64_t value,
1418                              const char *name, Error **errp)
1419 {
1420     QNum *qnum = qnum_from_int(value);
1421     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1422
1423     qobject_unref(qnum);
1424 }
1425
1426 int64_t object_property_get_int(Object *obj, const char *name,
1427                                 Error **errp)
1428 {
1429     QObject *ret = object_property_get_qobject(obj, name, errp);
1430     QNum *qnum;
1431     int64_t retval;
1432
1433     if (!ret) {
1434         return -1;
1435     }
1436
1437     qnum = qobject_to(QNum, ret);
1438     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1439         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1440         retval = -1;
1441     }
1442
1443     qobject_unref(ret);
1444     return retval;
1445 }
1446
1447 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1448 {
1449     Visitor *v = qobject_input_visitor_new(prop->defval);
1450
1451     assert(prop->set != NULL);
1452     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1453
1454     visit_free(v);
1455 }
1456
1457 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1458 {
1459     assert(!prop->defval);
1460     assert(!prop->init);
1461
1462     prop->defval = defval;
1463     prop->init = object_property_init_defval;
1464 }
1465
1466 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1467 {
1468     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1469 }
1470
1471 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1472 {
1473     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1474 }
1475
1476 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1477 {
1478     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1479 }
1480
1481 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1482 {
1483     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1484 }
1485
1486 void object_property_set_uint(Object *obj, uint64_t value,
1487                               const char *name, Error **errp)
1488 {
1489     QNum *qnum = qnum_from_uint(value);
1490
1491     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1492     qobject_unref(qnum);
1493 }
1494
1495 uint64_t object_property_get_uint(Object *obj, const char *name,
1496                                   Error **errp)
1497 {
1498     QObject *ret = object_property_get_qobject(obj, name, errp);
1499     QNum *qnum;
1500     uint64_t retval;
1501
1502     if (!ret) {
1503         return 0;
1504     }
1505     qnum = qobject_to(QNum, ret);
1506     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1507         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1508         retval = 0;
1509     }
1510
1511     qobject_unref(ret);
1512     return retval;
1513 }
1514
1515 typedef struct EnumProperty {
1516     const QEnumLookup *lookup;
1517     int (*get)(Object *, Error **);
1518     void (*set)(Object *, int, Error **);
1519 } EnumProperty;
1520
1521 int object_property_get_enum(Object *obj, const char *name,
1522                              const char *typename, Error **errp)
1523 {
1524     char *str;
1525     int ret;
1526     ObjectProperty *prop = object_property_find(obj, name, errp);
1527     EnumProperty *enumprop;
1528
1529     if (prop == NULL) {
1530         return 0;
1531     }
1532
1533     if (!g_str_equal(prop->type, typename)) {
1534         error_setg(errp, "Property %s on %s is not '%s' enum type",
1535                    name, object_class_get_name(
1536                        object_get_class(obj)), typename);
1537         return 0;
1538     }
1539
1540     enumprop = prop->opaque;
1541
1542     str = object_property_get_str(obj, name, errp);
1543     if (!str) {
1544         return 0;
1545     }
1546
1547     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1548     g_free(str);
1549
1550     return ret;
1551 }
1552
1553 void object_property_parse(Object *obj, const char *string,
1554                            const char *name, Error **errp)
1555 {
1556     Visitor *v = string_input_visitor_new(string);
1557     object_property_set(obj, v, name, errp);
1558     visit_free(v);
1559 }
1560
1561 char *object_property_print(Object *obj, const char *name, bool human,
1562                             Error **errp)
1563 {
1564     Visitor *v;
1565     char *string = NULL;
1566     Error *local_err = NULL;
1567
1568     v = string_output_visitor_new(human, &string);
1569     object_property_get(obj, v, name, &local_err);
1570     if (local_err) {
1571         error_propagate(errp, local_err);
1572         goto out;
1573     }
1574
1575     visit_complete(v, &string);
1576
1577 out:
1578     visit_free(v);
1579     return string;
1580 }
1581
1582 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1583 {
1584     ObjectProperty *prop = object_property_find(obj, name, errp);
1585     if (prop == NULL) {
1586         return NULL;
1587     }
1588
1589     return prop->type;
1590 }
1591
1592 Object *object_get_root(void)
1593 {
1594     static Object *root;
1595
1596     if (!root) {
1597         root = object_new("container");
1598     }
1599
1600     return root;
1601 }
1602
1603 Object *object_get_objects_root(void)
1604 {
1605     return container_get(object_get_root(), "/objects");
1606 }
1607
1608 Object *object_get_internal_root(void)
1609 {
1610     static Object *internal_root;
1611
1612     if (!internal_root) {
1613         internal_root = object_new("container");
1614     }
1615
1616     return internal_root;
1617 }
1618
1619 static void object_get_child_property(Object *obj, Visitor *v,
1620                                       const char *name, void *opaque,
1621                                       Error **errp)
1622 {
1623     Object *child = opaque;
1624     char *path;
1625
1626     path = object_get_canonical_path(child);
1627     visit_type_str(v, name, &path, errp);
1628     g_free(path);
1629 }
1630
1631 static Object *object_resolve_child_property(Object *parent, void *opaque,
1632                                              const char *part)
1633 {
1634     return opaque;
1635 }
1636
1637 static void object_finalize_child_property(Object *obj, const char *name,
1638                                            void *opaque)
1639 {
1640     Object *child = opaque;
1641
1642     if (child->class->unparent) {
1643         (child->class->unparent)(child);
1644     }
1645     child->parent = NULL;
1646     object_unref(child);
1647 }
1648
1649 ObjectProperty *
1650 object_property_add_child(Object *obj, const char *name,
1651                           Object *child, Error **errp)
1652 {
1653     g_autofree char *type = NULL;
1654     ObjectProperty *op;
1655
1656     if (child->parent != NULL) {
1657         error_setg(errp, "child object is already parented");
1658         return NULL;
1659     }
1660
1661     type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
1662
1663     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1664                              object_finalize_child_property, child, errp);
1665     if (!op) {
1666         return NULL;
1667     }
1668
1669     op->resolve = object_resolve_child_property;
1670     object_ref(child);
1671     child->parent = obj;
1672     return op;
1673 }
1674
1675 void object_property_allow_set_link(const Object *obj, const char *name,
1676                                     Object *val, Error **errp)
1677 {
1678     /* Allow the link to be set, always */
1679 }
1680
1681 typedef struct {
1682     union {
1683         Object **targetp;
1684         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1685         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1686     };
1687     void (*check)(const Object *, const char *, Object *, Error **);
1688     ObjectPropertyLinkFlags flags;
1689 } LinkProperty;
1690
1691 static Object **
1692 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1693 {
1694     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1695         return &lprop->target;
1696     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1697         return (void *)obj + lprop->offset;
1698     } else {
1699         return lprop->targetp;
1700     }
1701 }
1702
1703 static void object_get_link_property(Object *obj, Visitor *v,
1704                                      const char *name, void *opaque,
1705                                      Error **errp)
1706 {
1707     LinkProperty *lprop = opaque;
1708     Object **targetp = object_link_get_targetp(obj, lprop);
1709     char *path;
1710
1711     if (*targetp) {
1712         path = object_get_canonical_path(*targetp);
1713         visit_type_str(v, name, &path, errp);
1714         g_free(path);
1715     } else {
1716         path = (char *)"";
1717         visit_type_str(v, name, &path, errp);
1718     }
1719 }
1720
1721 /*
1722  * object_resolve_link:
1723  *
1724  * Lookup an object and ensure its type matches the link property type.  This
1725  * is similar to object_resolve_path() except type verification against the
1726  * link property is performed.
1727  *
1728  * Returns: The matched object or NULL on path lookup failures.
1729  */
1730 static Object *object_resolve_link(Object *obj, const char *name,
1731                                    const char *path, Error **errp)
1732 {
1733     const char *type;
1734     char *target_type;
1735     bool ambiguous = false;
1736     Object *target;
1737
1738     /* Go from link<FOO> to FOO.  */
1739     type = object_property_get_type(obj, name, NULL);
1740     target_type = g_strndup(&type[5], strlen(type) - 6);
1741     target = object_resolve_path_type(path, target_type, &ambiguous);
1742
1743     if (ambiguous) {
1744         error_setg(errp, "Path '%s' does not uniquely identify an object",
1745                    path);
1746     } else if (!target) {
1747         target = object_resolve_path(path, &ambiguous);
1748         if (target || ambiguous) {
1749             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1750         } else {
1751             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1752                       "Device '%s' not found", path);
1753         }
1754         target = NULL;
1755     }
1756     g_free(target_type);
1757
1758     return target;
1759 }
1760
1761 static void object_set_link_property(Object *obj, Visitor *v,
1762                                      const char *name, void *opaque,
1763                                      Error **errp)
1764 {
1765     Error *local_err = NULL;
1766     LinkProperty *prop = opaque;
1767     Object **targetp = object_link_get_targetp(obj, prop);
1768     Object *old_target = *targetp;
1769     Object *new_target = NULL;
1770     char *path = NULL;
1771
1772     visit_type_str(v, name, &path, &local_err);
1773
1774     if (!local_err && strcmp(path, "") != 0) {
1775         new_target = object_resolve_link(obj, name, path, &local_err);
1776     }
1777
1778     g_free(path);
1779     if (local_err) {
1780         error_propagate(errp, local_err);
1781         return;
1782     }
1783
1784     prop->check(obj, name, new_target, &local_err);
1785     if (local_err) {
1786         error_propagate(errp, local_err);
1787         return;
1788     }
1789
1790     *targetp = new_target;
1791     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1792         object_ref(new_target);
1793         object_unref(old_target);
1794     }
1795 }
1796
1797 static Object *object_resolve_link_property(Object *parent, void *opaque,
1798                                             const char *part)
1799 {
1800     LinkProperty *lprop = opaque;
1801
1802     return *object_link_get_targetp(parent, lprop);
1803 }
1804
1805 static void object_release_link_property(Object *obj, const char *name,
1806                                          void *opaque)
1807 {
1808     LinkProperty *prop = opaque;
1809     Object **targetp = object_link_get_targetp(obj, prop);
1810
1811     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1812         object_unref(*targetp);
1813     }
1814     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1815         g_free(prop);
1816     }
1817 }
1818
1819 static ObjectProperty *
1820 object_add_link_prop(Object *obj, const char *name,
1821                      const char *type, void *ptr,
1822                      void (*check)(const Object *, const char *,
1823                                    Object *, Error **),
1824                      ObjectPropertyLinkFlags flags,
1825                      Error **errp)
1826 {
1827     LinkProperty *prop = g_malloc(sizeof(*prop));
1828     g_autofree char *full_type = NULL;
1829     ObjectProperty *op;
1830
1831     if (flags & OBJ_PROP_LINK_DIRECT) {
1832         prop->target = ptr;
1833     } else {
1834         prop->targetp = ptr;
1835     }
1836     prop->check = check;
1837     prop->flags = flags;
1838
1839     full_type = g_strdup_printf("link<%s>", type);
1840
1841     op = object_property_add(obj, name, full_type,
1842                              object_get_link_property,
1843                              check ? object_set_link_property : NULL,
1844                              object_release_link_property,
1845                              prop,
1846                              errp);
1847     if (!op) {
1848         g_free(prop);
1849         return NULL;
1850     }
1851
1852     op->resolve = object_resolve_link_property;
1853     return op;
1854 }
1855
1856 ObjectProperty *
1857 object_property_add_link(Object *obj, const char *name,
1858                          const char *type, Object **targetp,
1859                          void (*check)(const Object *, const char *,
1860                                        Object *, Error **),
1861                          ObjectPropertyLinkFlags flags,
1862                          Error **errp)
1863 {
1864     return object_add_link_prop(obj, name, type, targetp, check, flags,
1865                                 errp);
1866 }
1867
1868 ObjectProperty *
1869 object_class_property_add_link(ObjectClass *oc,
1870     const char *name,
1871     const char *type, ptrdiff_t offset,
1872     void (*check)(const Object *obj, const char *name,
1873                   Object *val, Error **errp),
1874     ObjectPropertyLinkFlags flags,
1875     Error **errp)
1876 {
1877     Error *local_err = NULL;
1878     LinkProperty *prop = g_new0(LinkProperty, 1);
1879     char *full_type;
1880     ObjectProperty *op;
1881
1882     prop->offset = offset;
1883     prop->check = check;
1884     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1885
1886     full_type = g_strdup_printf("link<%s>", type);
1887
1888     op = object_class_property_add(oc, name, full_type,
1889                                    object_get_link_property,
1890                                    check ? object_set_link_property : NULL,
1891                                    object_release_link_property,
1892                                    prop,
1893                                    &local_err);
1894     if (local_err) {
1895         error_propagate(errp, local_err);
1896         g_free(prop);
1897         goto out;
1898     }
1899
1900     op->resolve = object_resolve_link_property;
1901
1902 out:
1903     g_free(full_type);
1904     return op;
1905 }
1906
1907 ObjectProperty *
1908 object_property_add_const_link(Object *obj, const char *name,
1909                                Object *target, Error **errp)
1910 {
1911     return object_add_link_prop(obj, name,
1912                                 object_get_typename(target), target,
1913                                 NULL, OBJ_PROP_LINK_DIRECT, errp);
1914 }
1915
1916 char *object_get_canonical_path_component(Object *obj)
1917 {
1918     ObjectProperty *prop = NULL;
1919     GHashTableIter iter;
1920
1921     if (obj->parent == NULL) {
1922         return NULL;
1923     }
1924
1925     g_hash_table_iter_init(&iter, obj->parent->properties);
1926     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1927         if (!object_property_is_child(prop)) {
1928             continue;
1929         }
1930
1931         if (prop->opaque == obj) {
1932             return g_strdup(prop->name);
1933         }
1934     }
1935
1936     /* obj had a parent but was not a child, should never happen */
1937     g_assert_not_reached();
1938     return NULL;
1939 }
1940
1941 char *object_get_canonical_path(Object *obj)
1942 {
1943     Object *root = object_get_root();
1944     char *newpath, *path = NULL;
1945
1946     if (obj == root) {
1947         return g_strdup("/");
1948     }
1949
1950     do {
1951         char *component = object_get_canonical_path_component(obj);
1952
1953         if (!component) {
1954             /* A canonical path must be complete, so discard what was
1955              * collected so far.
1956              */
1957             g_free(path);
1958             return NULL;
1959         }
1960
1961         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1962         g_free(path);
1963         g_free(component);
1964         path = newpath;
1965         obj = obj->parent;
1966     } while (obj != root);
1967
1968     return path;
1969 }
1970
1971 Object *object_resolve_path_component(Object *parent, const char *part)
1972 {
1973     ObjectProperty *prop = object_property_find(parent, part, NULL);
1974     if (prop == NULL) {
1975         return NULL;
1976     }
1977
1978     if (prop->resolve) {
1979         return prop->resolve(parent, prop->opaque, part);
1980     } else {
1981         return NULL;
1982     }
1983 }
1984
1985 static Object *object_resolve_abs_path(Object *parent,
1986                                        char **parts,
1987                                        const char *typename,
1988                                        int index)
1989 {
1990     Object *child;
1991
1992     if (parts[index] == NULL) {
1993         return object_dynamic_cast(parent, typename);
1994     }
1995
1996     if (strcmp(parts[index], "") == 0) {
1997         return object_resolve_abs_path(parent, parts, typename, index + 1);
1998     }
1999
2000     child = object_resolve_path_component(parent, parts[index]);
2001     if (!child) {
2002         return NULL;
2003     }
2004
2005     return object_resolve_abs_path(child, parts, typename, index + 1);
2006 }
2007
2008 static Object *object_resolve_partial_path(Object *parent,
2009                                            char **parts,
2010                                            const char *typename,
2011                                            bool *ambiguous)
2012 {
2013     Object *obj;
2014     GHashTableIter iter;
2015     ObjectProperty *prop;
2016
2017     obj = object_resolve_abs_path(parent, parts, typename, 0);
2018
2019     g_hash_table_iter_init(&iter, parent->properties);
2020     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2021         Object *found;
2022
2023         if (!object_property_is_child(prop)) {
2024             continue;
2025         }
2026
2027         found = object_resolve_partial_path(prop->opaque, parts,
2028                                             typename, ambiguous);
2029         if (found) {
2030             if (obj) {
2031                 *ambiguous = true;
2032                 return NULL;
2033             }
2034             obj = found;
2035         }
2036
2037         if (*ambiguous) {
2038             return NULL;
2039         }
2040     }
2041
2042     return obj;
2043 }
2044
2045 Object *object_resolve_path_type(const char *path, const char *typename,
2046                                  bool *ambiguousp)
2047 {
2048     Object *obj;
2049     char **parts;
2050
2051     parts = g_strsplit(path, "/", 0);
2052     assert(parts);
2053
2054     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2055         bool ambiguous = false;
2056         obj = object_resolve_partial_path(object_get_root(), parts,
2057                                           typename, &ambiguous);
2058         if (ambiguousp) {
2059             *ambiguousp = ambiguous;
2060         }
2061     } else {
2062         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
2063     }
2064
2065     g_strfreev(parts);
2066
2067     return obj;
2068 }
2069
2070 Object *object_resolve_path(const char *path, bool *ambiguous)
2071 {
2072     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2073 }
2074
2075 typedef struct StringProperty
2076 {
2077     char *(*get)(Object *, Error **);
2078     void (*set)(Object *, const char *, Error **);
2079 } StringProperty;
2080
2081 static void property_get_str(Object *obj, Visitor *v, const char *name,
2082                              void *opaque, Error **errp)
2083 {
2084     StringProperty *prop = opaque;
2085     char *value;
2086     Error *err = NULL;
2087
2088     value = prop->get(obj, &err);
2089     if (err) {
2090         error_propagate(errp, err);
2091         return;
2092     }
2093
2094     visit_type_str(v, name, &value, errp);
2095     g_free(value);
2096 }
2097
2098 static void property_set_str(Object *obj, Visitor *v, const char *name,
2099                              void *opaque, Error **errp)
2100 {
2101     StringProperty *prop = opaque;
2102     char *value;
2103     Error *local_err = NULL;
2104
2105     visit_type_str(v, name, &value, &local_err);
2106     if (local_err) {
2107         error_propagate(errp, local_err);
2108         return;
2109     }
2110
2111     prop->set(obj, value, errp);
2112     g_free(value);
2113 }
2114
2115 static void property_release_str(Object *obj, const char *name,
2116                                  void *opaque)
2117 {
2118     StringProperty *prop = opaque;
2119     g_free(prop);
2120 }
2121
2122 ObjectProperty *
2123 object_property_add_str(Object *obj, const char *name,
2124                         char *(*get)(Object *, Error **),
2125                         void (*set)(Object *, const char *, Error **),
2126                         Error **errp)
2127 {
2128     StringProperty *prop = g_malloc0(sizeof(*prop));
2129     ObjectProperty *op;
2130
2131     prop->get = get;
2132     prop->set = set;
2133
2134     op = object_property_add(obj, name, "string",
2135                              get ? property_get_str : NULL,
2136                              set ? property_set_str : NULL,
2137                              property_release_str,
2138                              prop, errp);
2139     if (!op) {
2140         g_free(prop);
2141     }
2142     return op;
2143 }
2144
2145 ObjectProperty *
2146 object_class_property_add_str(ObjectClass *klass, const char *name,
2147                                    char *(*get)(Object *, Error **),
2148                                    void (*set)(Object *, const char *,
2149                                                Error **),
2150                                    Error **errp)
2151 {
2152     Error *local_err = NULL;
2153     StringProperty *prop = g_malloc0(sizeof(*prop));
2154     ObjectProperty *rv;
2155
2156     prop->get = get;
2157     prop->set = set;
2158
2159     rv = object_class_property_add(klass, name, "string",
2160                               get ? property_get_str : NULL,
2161                               set ? property_set_str : NULL,
2162                               NULL,
2163                               prop, &local_err);
2164     if (local_err) {
2165         error_propagate(errp, local_err);
2166         g_free(prop);
2167     }
2168
2169     return rv;
2170 }
2171
2172 typedef struct BoolProperty
2173 {
2174     bool (*get)(Object *, Error **);
2175     void (*set)(Object *, bool, Error **);
2176 } BoolProperty;
2177
2178 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2179                               void *opaque, Error **errp)
2180 {
2181     BoolProperty *prop = opaque;
2182     bool value;
2183     Error *err = NULL;
2184
2185     value = prop->get(obj, &err);
2186     if (err) {
2187         error_propagate(errp, err);
2188         return;
2189     }
2190
2191     visit_type_bool(v, name, &value, errp);
2192 }
2193
2194 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2195                               void *opaque, Error **errp)
2196 {
2197     BoolProperty *prop = opaque;
2198     bool value;
2199     Error *local_err = NULL;
2200
2201     visit_type_bool(v, name, &value, &local_err);
2202     if (local_err) {
2203         error_propagate(errp, local_err);
2204         return;
2205     }
2206
2207     prop->set(obj, value, errp);
2208 }
2209
2210 static void property_release_bool(Object *obj, const char *name,
2211                                   void *opaque)
2212 {
2213     BoolProperty *prop = opaque;
2214     g_free(prop);
2215 }
2216
2217 ObjectProperty *
2218 object_property_add_bool(Object *obj, const char *name,
2219                          bool (*get)(Object *, Error **),
2220                          void (*set)(Object *, bool, Error **),
2221                          Error **errp)
2222 {
2223     BoolProperty *prop = g_malloc0(sizeof(*prop));
2224     ObjectProperty *op;
2225
2226     prop->get = get;
2227     prop->set = set;
2228
2229     op = object_property_add(obj, name, "bool",
2230                              get ? property_get_bool : NULL,
2231                              set ? property_set_bool : NULL,
2232                              property_release_bool,
2233                              prop, errp);
2234     if (!op) {
2235         g_free(prop);
2236     }
2237     return op;
2238 }
2239
2240 ObjectProperty *
2241 object_class_property_add_bool(ObjectClass *klass, const char *name,
2242                                     bool (*get)(Object *, Error **),
2243                                     void (*set)(Object *, bool, Error **),
2244                                     Error **errp)
2245 {
2246     Error *local_err = NULL;
2247     BoolProperty *prop = g_malloc0(sizeof(*prop));
2248     ObjectProperty *rv;
2249
2250     prop->get = get;
2251     prop->set = set;
2252
2253     rv = object_class_property_add(klass, name, "bool",
2254                               get ? property_get_bool : NULL,
2255                               set ? property_set_bool : NULL,
2256                               NULL,
2257                               prop, &local_err);
2258     if (local_err) {
2259         error_propagate(errp, local_err);
2260         g_free(prop);
2261     }
2262
2263     return rv;
2264 }
2265
2266 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2267                               void *opaque, Error **errp)
2268 {
2269     EnumProperty *prop = opaque;
2270     int value;
2271     Error *err = NULL;
2272
2273     value = prop->get(obj, &err);
2274     if (err) {
2275         error_propagate(errp, err);
2276         return;
2277     }
2278
2279     visit_type_enum(v, name, &value, prop->lookup, errp);
2280 }
2281
2282 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2283                               void *opaque, Error **errp)
2284 {
2285     EnumProperty *prop = opaque;
2286     int value;
2287     Error *err = NULL;
2288
2289     visit_type_enum(v, name, &value, prop->lookup, &err);
2290     if (err) {
2291         error_propagate(errp, err);
2292         return;
2293     }
2294     prop->set(obj, value, errp);
2295 }
2296
2297 static void property_release_enum(Object *obj, const char *name,
2298                                   void *opaque)
2299 {
2300     EnumProperty *prop = opaque;
2301     g_free(prop);
2302 }
2303
2304 ObjectProperty *
2305 object_property_add_enum(Object *obj, const char *name,
2306                          const char *typename,
2307                          const QEnumLookup *lookup,
2308                          int (*get)(Object *, Error **),
2309                          void (*set)(Object *, int, Error **),
2310                          Error **errp)
2311 {
2312     EnumProperty *prop = g_malloc(sizeof(*prop));
2313     ObjectProperty *op;
2314
2315     prop->lookup = lookup;
2316     prop->get = get;
2317     prop->set = set;
2318
2319     op = object_property_add(obj, name, typename,
2320                              get ? property_get_enum : NULL,
2321                              set ? property_set_enum : NULL,
2322                              property_release_enum,
2323                              prop, errp);
2324     if (!op) {
2325         g_free(prop);
2326     }
2327     return op;
2328 }
2329
2330 ObjectProperty *
2331 object_class_property_add_enum(ObjectClass *klass, const char *name,
2332                                     const char *typename,
2333                                     const QEnumLookup *lookup,
2334                                     int (*get)(Object *, Error **),
2335                                     void (*set)(Object *, int, Error **),
2336                                     Error **errp)
2337 {
2338     Error *local_err = NULL;
2339     EnumProperty *prop = g_malloc(sizeof(*prop));
2340     ObjectProperty *rv;
2341
2342     prop->lookup = lookup;
2343     prop->get = get;
2344     prop->set = set;
2345
2346     rv = object_class_property_add(klass, name, typename,
2347                               get ? property_get_enum : NULL,
2348                               set ? property_set_enum : NULL,
2349                               NULL,
2350                               prop, &local_err);
2351     if (local_err) {
2352         error_propagate(errp, local_err);
2353         g_free(prop);
2354     }
2355
2356     return rv;
2357 }
2358
2359 typedef struct TMProperty {
2360     void (*get)(Object *, struct tm *, Error **);
2361 } TMProperty;
2362
2363 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2364                             void *opaque, Error **errp)
2365 {
2366     TMProperty *prop = opaque;
2367     Error *err = NULL;
2368     struct tm value;
2369
2370     prop->get(obj, &value, &err);
2371     if (err) {
2372         goto out;
2373     }
2374
2375     visit_start_struct(v, name, NULL, 0, &err);
2376     if (err) {
2377         goto out;
2378     }
2379     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2380     if (err) {
2381         goto out_end;
2382     }
2383     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2384     if (err) {
2385         goto out_end;
2386     }
2387     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2388     if (err) {
2389         goto out_end;
2390     }
2391     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2392     if (err) {
2393         goto out_end;
2394     }
2395     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2396     if (err) {
2397         goto out_end;
2398     }
2399     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2400     if (err) {
2401         goto out_end;
2402     }
2403     visit_check_struct(v, &err);
2404 out_end:
2405     visit_end_struct(v, NULL);
2406 out:
2407     error_propagate(errp, err);
2408
2409 }
2410
2411 static void property_release_tm(Object *obj, const char *name,
2412                                 void *opaque)
2413 {
2414     TMProperty *prop = opaque;
2415     g_free(prop);
2416 }
2417
2418 ObjectProperty *
2419 object_property_add_tm(Object *obj, const char *name,
2420                        void (*get)(Object *, struct tm *, Error **),
2421                        Error **errp)
2422 {
2423     TMProperty *prop = g_malloc0(sizeof(*prop));
2424     ObjectProperty *op;
2425
2426     prop->get = get;
2427
2428     op = object_property_add(obj, name, "struct tm",
2429                              get ? property_get_tm : NULL, NULL,
2430                              property_release_tm,
2431                              prop, errp);
2432     if (!op) {
2433         g_free(prop);
2434     }
2435     return op;
2436 }
2437
2438 ObjectProperty *
2439 object_class_property_add_tm(ObjectClass *klass, const char *name,
2440                                   void (*get)(Object *, struct tm *, Error **),
2441                                   Error **errp)
2442 {
2443     Error *local_err = NULL;
2444     TMProperty *prop = g_malloc0(sizeof(*prop));
2445     ObjectProperty *rv;
2446
2447     prop->get = get;
2448
2449     rv = object_class_property_add(klass, name, "struct tm",
2450                               get ? property_get_tm : NULL, NULL,
2451                               NULL,
2452                               prop, &local_err);
2453     if (local_err) {
2454         error_propagate(errp, local_err);
2455         g_free(prop);
2456     }
2457
2458     return rv;
2459 }
2460
2461 static char *qdev_get_type(Object *obj, Error **errp)
2462 {
2463     return g_strdup(object_get_typename(obj));
2464 }
2465
2466 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2467                                    void *opaque, Error **errp)
2468 {
2469     uint8_t value = *(uint8_t *)opaque;
2470     visit_type_uint8(v, name, &value, errp);
2471 }
2472
2473 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2474                                    void *opaque, Error **errp)
2475 {
2476     uint8_t *field = opaque;
2477     uint8_t value;
2478     Error *local_err = NULL;
2479
2480     visit_type_uint8(v, name, &value, &local_err);
2481     if (local_err) {
2482         error_propagate(errp, local_err);
2483         return;
2484     }
2485
2486     *field = value;
2487 }
2488
2489 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2490                                     void *opaque, Error **errp)
2491 {
2492     uint16_t value = *(uint16_t *)opaque;
2493     visit_type_uint16(v, name, &value, errp);
2494 }
2495
2496 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2497                                     void *opaque, Error **errp)
2498 {
2499     uint16_t *field = opaque;
2500     uint16_t value;
2501     Error *local_err = NULL;
2502
2503     visit_type_uint16(v, name, &value, &local_err);
2504     if (local_err) {
2505         error_propagate(errp, local_err);
2506         return;
2507     }
2508
2509     *field = value;
2510 }
2511
2512 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2513                                     void *opaque, Error **errp)
2514 {
2515     uint32_t value = *(uint32_t *)opaque;
2516     visit_type_uint32(v, name, &value, errp);
2517 }
2518
2519 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2520                                     void *opaque, Error **errp)
2521 {
2522     uint32_t *field = opaque;
2523     uint32_t value;
2524     Error *local_err = NULL;
2525
2526     visit_type_uint32(v, name, &value, &local_err);
2527     if (local_err) {
2528         error_propagate(errp, local_err);
2529         return;
2530     }
2531
2532     *field = value;
2533 }
2534
2535 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2536                                     void *opaque, Error **errp)
2537 {
2538     uint64_t value = *(uint64_t *)opaque;
2539     visit_type_uint64(v, name, &value, errp);
2540 }
2541
2542 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2543                                     void *opaque, Error **errp)
2544 {
2545     uint64_t *field = opaque;
2546     uint64_t value;
2547     Error *local_err = NULL;
2548
2549     visit_type_uint64(v, name, &value, &local_err);
2550     if (local_err) {
2551         error_propagate(errp, local_err);
2552         return;
2553     }
2554
2555     *field = value;
2556 }
2557
2558 ObjectProperty *
2559 object_property_add_uint8_ptr(Object *obj, const char *name,
2560                               const uint8_t *v,
2561                               ObjectPropertyFlags flags,
2562                               Error **errp)
2563 {
2564     ObjectPropertyAccessor *getter = NULL;
2565     ObjectPropertyAccessor *setter = NULL;
2566
2567     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2568         getter = property_get_uint8_ptr;
2569     }
2570
2571     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2572         setter = property_set_uint8_ptr;
2573     }
2574
2575     return object_property_add(obj, name, "uint8",
2576                                getter, setter, NULL, (void *)v, errp);
2577 }
2578
2579 ObjectProperty *
2580 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2581                                     const uint8_t *v,
2582                                     ObjectPropertyFlags flags,
2583                                     Error **errp)
2584 {
2585     ObjectPropertyAccessor *getter = NULL;
2586     ObjectPropertyAccessor *setter = NULL;
2587
2588     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2589         getter = property_get_uint8_ptr;
2590     }
2591
2592     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2593         setter = property_set_uint8_ptr;
2594     }
2595
2596     return object_class_property_add(klass, name, "uint8",
2597                                      getter, setter, NULL, (void *)v, errp);
2598 }
2599
2600 ObjectProperty *
2601 object_property_add_uint16_ptr(Object *obj, const char *name,
2602                                const uint16_t *v,
2603                                ObjectPropertyFlags flags,
2604                                Error **errp)
2605 {
2606     ObjectPropertyAccessor *getter = NULL;
2607     ObjectPropertyAccessor *setter = NULL;
2608
2609     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2610         getter = property_get_uint16_ptr;
2611     }
2612
2613     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2614         setter = property_set_uint16_ptr;
2615     }
2616
2617     return object_property_add(obj, name, "uint16",
2618                                getter, setter, NULL, (void *)v, errp);
2619 }
2620
2621 ObjectProperty *
2622 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2623                                      const uint16_t *v,
2624                                      ObjectPropertyFlags flags,
2625                                      Error **errp)
2626 {
2627     ObjectPropertyAccessor *getter = NULL;
2628     ObjectPropertyAccessor *setter = NULL;
2629
2630     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2631         getter = property_get_uint16_ptr;
2632     }
2633
2634     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2635         setter = property_set_uint16_ptr;
2636     }
2637
2638     return object_class_property_add(klass, name, "uint16",
2639                                      getter, setter, NULL, (void *)v, errp);
2640 }
2641
2642 ObjectProperty *
2643 object_property_add_uint32_ptr(Object *obj, const char *name,
2644                                const uint32_t *v,
2645                                ObjectPropertyFlags flags,
2646                                Error **errp)
2647 {
2648     ObjectPropertyAccessor *getter = NULL;
2649     ObjectPropertyAccessor *setter = NULL;
2650
2651     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2652         getter = property_get_uint32_ptr;
2653     }
2654
2655     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2656         setter = property_set_uint32_ptr;
2657     }
2658
2659     return object_property_add(obj, name, "uint32",
2660                                getter, setter, NULL, (void *)v, errp);
2661 }
2662
2663 ObjectProperty *
2664 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2665                                      const uint32_t *v,
2666                                      ObjectPropertyFlags flags,
2667                                      Error **errp)
2668 {
2669     ObjectPropertyAccessor *getter = NULL;
2670     ObjectPropertyAccessor *setter = NULL;
2671
2672     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2673         getter = property_get_uint32_ptr;
2674     }
2675
2676     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2677         setter = property_set_uint32_ptr;
2678     }
2679
2680     return object_class_property_add(klass, name, "uint32",
2681                                      getter, setter, NULL, (void *)v, errp);
2682 }
2683
2684 ObjectProperty *
2685 object_property_add_uint64_ptr(Object *obj, const char *name,
2686                                const uint64_t *v,
2687                                ObjectPropertyFlags flags,
2688                                Error **errp)
2689 {
2690     ObjectPropertyAccessor *getter = NULL;
2691     ObjectPropertyAccessor *setter = NULL;
2692
2693     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2694         getter = property_get_uint64_ptr;
2695     }
2696
2697     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2698         setter = property_set_uint64_ptr;
2699     }
2700
2701     return object_property_add(obj, name, "uint64",
2702                                getter, setter, NULL, (void *)v, errp);
2703 }
2704
2705 ObjectProperty *
2706 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2707                                      const uint64_t *v,
2708                                      ObjectPropertyFlags flags,
2709                                      Error **errp)
2710 {
2711     ObjectPropertyAccessor *getter = NULL;
2712     ObjectPropertyAccessor *setter = NULL;
2713
2714     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2715         getter = property_get_uint64_ptr;
2716     }
2717
2718     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2719         setter = property_set_uint64_ptr;
2720     }
2721
2722     return object_class_property_add(klass, name, "uint64",
2723                                      getter, setter, NULL, (void *)v, errp);
2724 }
2725
2726 typedef struct {
2727     Object *target_obj;
2728     char *target_name;
2729 } AliasProperty;
2730
2731 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2732                                void *opaque, Error **errp)
2733 {
2734     AliasProperty *prop = opaque;
2735
2736     object_property_get(prop->target_obj, v, prop->target_name, errp);
2737 }
2738
2739 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2740                                void *opaque, Error **errp)
2741 {
2742     AliasProperty *prop = opaque;
2743
2744     object_property_set(prop->target_obj, v, prop->target_name, errp);
2745 }
2746
2747 static Object *property_resolve_alias(Object *obj, void *opaque,
2748                                       const char *part)
2749 {
2750     AliasProperty *prop = opaque;
2751
2752     return object_resolve_path_component(prop->target_obj, prop->target_name);
2753 }
2754
2755 static void property_release_alias(Object *obj, const char *name, void *opaque)
2756 {
2757     AliasProperty *prop = opaque;
2758
2759     g_free(prop->target_name);
2760     g_free(prop);
2761 }
2762
2763 ObjectProperty *
2764 object_property_add_alias(Object *obj, const char *name,
2765                           Object *target_obj, const char *target_name,
2766                           Error **errp)
2767 {
2768     AliasProperty *prop;
2769     ObjectProperty *op;
2770     ObjectProperty *target_prop;
2771     g_autofree char *prop_type = NULL;
2772
2773     target_prop = object_property_find(target_obj, target_name, errp);
2774     if (!target_prop) {
2775         return NULL;
2776     }
2777
2778     if (object_property_is_child(target_prop)) {
2779         prop_type = g_strdup_printf("link%s",
2780                                     target_prop->type + strlen("child"));
2781     } else {
2782         prop_type = g_strdup(target_prop->type);
2783     }
2784
2785     prop = g_malloc(sizeof(*prop));
2786     prop->target_obj = target_obj;
2787     prop->target_name = g_strdup(target_name);
2788
2789     op = object_property_add(obj, name, prop_type,
2790                              property_get_alias,
2791                              property_set_alias,
2792                              property_release_alias,
2793                              prop, errp);
2794     if (!op) {
2795         g_free(prop);
2796         return NULL;
2797     }
2798
2799     op->resolve = property_resolve_alias;
2800     if (target_prop->defval) {
2801         op->defval = qobject_ref(target_prop->defval);
2802     }
2803
2804     object_property_set_description(obj, op->name,
2805                                     target_prop->description);
2806     return op;
2807 }
2808
2809 void object_property_set_description(Object *obj, const char *name,
2810                                      const char *description)
2811 {
2812     ObjectProperty *op;
2813
2814     op = object_property_find(obj, name, &error_abort);
2815     g_free(op->description);
2816     op->description = g_strdup(description);
2817 }
2818
2819 void object_class_property_set_description(ObjectClass *klass,
2820                                            const char *name,
2821                                            const char *description)
2822 {
2823     ObjectProperty *op;
2824
2825     op = g_hash_table_lookup(klass->properties, name);
2826     g_free(op->description);
2827     op->description = g_strdup(description);
2828 }
2829
2830 static void object_class_init(ObjectClass *klass, void *data)
2831 {
2832     object_class_property_add_str(klass, "type", qdev_get_type,
2833                                   NULL, &error_abort);
2834 }
2835
2836 static void register_types(void)
2837 {
2838     static TypeInfo interface_info = {
2839         .name = TYPE_INTERFACE,
2840         .class_size = sizeof(InterfaceClass),
2841         .abstract = true,
2842     };
2843
2844     static TypeInfo object_info = {
2845         .name = TYPE_OBJECT,
2846         .instance_size = sizeof(Object),
2847         .class_init = object_class_init,
2848         .abstract = true,
2849     };
2850
2851     type_interface = type_register_internal(&interface_info);
2852     type_register_internal(&object_info);
2853 }
2854
2855 type_init(register_types)