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(OBJECT(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                 do_object_child_foreach(child, fn, opaque, true);
1055             }
1056         }
1057     }
1058     return ret;
1059 }
1060
1061 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1062                          void *opaque)
1063 {
1064     return do_object_child_foreach(obj, fn, opaque, false);
1065 }
1066
1067 int object_child_foreach_recursive(Object *obj,
1068                                    int (*fn)(Object *child, void *opaque),
1069                                    void *opaque)
1070 {
1071     return do_object_child_foreach(obj, fn, opaque, true);
1072 }
1073
1074 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1075 {
1076     GSList **list = opaque;
1077
1078     *list = g_slist_prepend(*list, klass);
1079 }
1080
1081 GSList *object_class_get_list(const char *implements_type,
1082                               bool include_abstract)
1083 {
1084     GSList *list = NULL;
1085
1086     object_class_foreach(object_class_get_list_tramp,
1087                          implements_type, include_abstract, &list);
1088     return list;
1089 }
1090
1091 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1092 {
1093     return strcasecmp(object_class_get_name((ObjectClass *)a),
1094                       object_class_get_name((ObjectClass *)b));
1095 }
1096
1097 GSList *object_class_get_list_sorted(const char *implements_type,
1098                                      bool include_abstract)
1099 {
1100     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1101                         object_class_cmp);
1102 }
1103
1104 Object *object_ref(Object *obj)
1105 {
1106     if (!obj) {
1107         return NULL;
1108     }
1109     atomic_inc(&obj->ref);
1110     return obj;
1111 }
1112
1113 void object_unref(Object *obj)
1114 {
1115     if (!obj) {
1116         return;
1117     }
1118     g_assert(obj->ref > 0);
1119
1120     /* parent always holds a reference to its children */
1121     if (atomic_fetch_dec(&obj->ref) == 1) {
1122         object_finalize(obj);
1123     }
1124 }
1125
1126 static ObjectProperty *
1127 object_property_try_add(Object *obj, const char *name, const char *type,
1128                         ObjectPropertyAccessor *get,
1129                         ObjectPropertyAccessor *set,
1130                         ObjectPropertyRelease *release,
1131                         void *opaque, Error **errp)
1132 {
1133     ObjectProperty *prop;
1134     size_t name_len = strlen(name);
1135
1136     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1137         int i;
1138         ObjectProperty *ret;
1139         char *name_no_array = g_strdup(name);
1140
1141         name_no_array[name_len - 3] = '\0';
1142         for (i = 0; ; ++i) {
1143             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1144
1145             ret = object_property_try_add(obj, full_name, type, get, set,
1146                                           release, opaque, NULL);
1147             g_free(full_name);
1148             if (ret) {
1149                 break;
1150             }
1151         }
1152         g_free(name_no_array);
1153         return ret;
1154     }
1155
1156     if (object_property_find(obj, name, NULL) != NULL) {
1157         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1158                    name, object_get_typename(obj));
1159         return NULL;
1160     }
1161
1162     prop = g_malloc0(sizeof(*prop));
1163
1164     prop->name = g_strdup(name);
1165     prop->type = g_strdup(type);
1166
1167     prop->get = get;
1168     prop->set = set;
1169     prop->release = release;
1170     prop->opaque = opaque;
1171
1172     g_hash_table_insert(obj->properties, prop->name, prop);
1173     return prop;
1174 }
1175
1176 ObjectProperty *
1177 object_property_add(Object *obj, const char *name, const char *type,
1178                     ObjectPropertyAccessor *get,
1179                     ObjectPropertyAccessor *set,
1180                     ObjectPropertyRelease *release,
1181                     void *opaque)
1182 {
1183     return object_property_try_add(obj, name, type, get, set, release,
1184                                    opaque, &error_abort);
1185 }
1186
1187 ObjectProperty *
1188 object_class_property_add(ObjectClass *klass,
1189                           const char *name,
1190                           const char *type,
1191                           ObjectPropertyAccessor *get,
1192                           ObjectPropertyAccessor *set,
1193                           ObjectPropertyRelease *release,
1194                           void *opaque)
1195 {
1196     ObjectProperty *prop;
1197
1198     assert(!object_class_property_find(klass, name, NULL));
1199
1200     prop = g_malloc0(sizeof(*prop));
1201
1202     prop->name = g_strdup(name);
1203     prop->type = g_strdup(type);
1204
1205     prop->get = get;
1206     prop->set = set;
1207     prop->release = release;
1208     prop->opaque = opaque;
1209
1210     g_hash_table_insert(klass->properties, prop->name, prop);
1211
1212     return prop;
1213 }
1214
1215 ObjectProperty *object_property_find(Object *obj, const char *name,
1216                                      Error **errp)
1217 {
1218     ObjectProperty *prop;
1219     ObjectClass *klass = object_get_class(obj);
1220
1221     prop = object_class_property_find(klass, name, NULL);
1222     if (prop) {
1223         return prop;
1224     }
1225
1226     prop = g_hash_table_lookup(obj->properties, name);
1227     if (prop) {
1228         return prop;
1229     }
1230
1231     error_setg(errp, "Property '.%s' not found", name);
1232     return NULL;
1233 }
1234
1235 void object_property_iter_init(ObjectPropertyIterator *iter,
1236                                Object *obj)
1237 {
1238     g_hash_table_iter_init(&iter->iter, obj->properties);
1239     iter->nextclass = object_get_class(obj);
1240 }
1241
1242 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1243 {
1244     gpointer key, val;
1245     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1246         if (!iter->nextclass) {
1247             return NULL;
1248         }
1249         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1250         iter->nextclass = object_class_get_parent(iter->nextclass);
1251     }
1252     return val;
1253 }
1254
1255 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1256                                      ObjectClass *klass)
1257 {
1258     g_hash_table_iter_init(&iter->iter, klass->properties);
1259     iter->nextclass = object_class_get_parent(klass);
1260 }
1261
1262 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1263                                            Error **errp)
1264 {
1265     ObjectProperty *prop;
1266     ObjectClass *parent_klass;
1267
1268     parent_klass = object_class_get_parent(klass);
1269     if (parent_klass) {
1270         prop = object_class_property_find(parent_klass, name, NULL);
1271         if (prop) {
1272             return prop;
1273         }
1274     }
1275
1276     prop = g_hash_table_lookup(klass->properties, name);
1277     if (!prop) {
1278         error_setg(errp, "Property '.%s' not found", name);
1279     }
1280     return prop;
1281 }
1282
1283 void object_property_del(Object *obj, const char *name, 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)
1652 {
1653     g_autofree char *type = NULL;
1654     ObjectProperty *op;
1655
1656     assert(!child->parent);
1657
1658     type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
1659
1660     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1661                              object_finalize_child_property, child);
1662     op->resolve = object_resolve_child_property;
1663     object_ref(child);
1664     child->parent = obj;
1665     return op;
1666 }
1667
1668 void object_property_allow_set_link(const Object *obj, const char *name,
1669                                     Object *val, Error **errp)
1670 {
1671     /* Allow the link to be set, always */
1672 }
1673
1674 typedef struct {
1675     union {
1676         Object **targetp;
1677         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1678         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1679     };
1680     void (*check)(const Object *, const char *, Object *, Error **);
1681     ObjectPropertyLinkFlags flags;
1682 } LinkProperty;
1683
1684 static Object **
1685 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1686 {
1687     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1688         return &lprop->target;
1689     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1690         return (void *)obj + lprop->offset;
1691     } else {
1692         return lprop->targetp;
1693     }
1694 }
1695
1696 static void object_get_link_property(Object *obj, Visitor *v,
1697                                      const char *name, void *opaque,
1698                                      Error **errp)
1699 {
1700     LinkProperty *lprop = opaque;
1701     Object **targetp = object_link_get_targetp(obj, lprop);
1702     char *path;
1703
1704     if (*targetp) {
1705         path = object_get_canonical_path(*targetp);
1706         visit_type_str(v, name, &path, errp);
1707         g_free(path);
1708     } else {
1709         path = (char *)"";
1710         visit_type_str(v, name, &path, errp);
1711     }
1712 }
1713
1714 /*
1715  * object_resolve_link:
1716  *
1717  * Lookup an object and ensure its type matches the link property type.  This
1718  * is similar to object_resolve_path() except type verification against the
1719  * link property is performed.
1720  *
1721  * Returns: The matched object or NULL on path lookup failures.
1722  */
1723 static Object *object_resolve_link(Object *obj, const char *name,
1724                                    const char *path, Error **errp)
1725 {
1726     const char *type;
1727     char *target_type;
1728     bool ambiguous = false;
1729     Object *target;
1730
1731     /* Go from link<FOO> to FOO.  */
1732     type = object_property_get_type(obj, name, NULL);
1733     target_type = g_strndup(&type[5], strlen(type) - 6);
1734     target = object_resolve_path_type(path, target_type, &ambiguous);
1735
1736     if (ambiguous) {
1737         error_setg(errp, "Path '%s' does not uniquely identify an object",
1738                    path);
1739     } else if (!target) {
1740         target = object_resolve_path(path, &ambiguous);
1741         if (target || ambiguous) {
1742             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1743         } else {
1744             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1745                       "Device '%s' not found", path);
1746         }
1747         target = NULL;
1748     }
1749     g_free(target_type);
1750
1751     return target;
1752 }
1753
1754 static void object_set_link_property(Object *obj, Visitor *v,
1755                                      const char *name, void *opaque,
1756                                      Error **errp)
1757 {
1758     Error *local_err = NULL;
1759     LinkProperty *prop = opaque;
1760     Object **targetp = object_link_get_targetp(obj, prop);
1761     Object *old_target = *targetp;
1762     Object *new_target = NULL;
1763     char *path = NULL;
1764
1765     visit_type_str(v, name, &path, &local_err);
1766
1767     if (!local_err && strcmp(path, "") != 0) {
1768         new_target = object_resolve_link(obj, name, path, &local_err);
1769     }
1770
1771     g_free(path);
1772     if (local_err) {
1773         error_propagate(errp, local_err);
1774         return;
1775     }
1776
1777     prop->check(obj, name, new_target, &local_err);
1778     if (local_err) {
1779         error_propagate(errp, local_err);
1780         return;
1781     }
1782
1783     *targetp = new_target;
1784     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1785         object_ref(new_target);
1786         object_unref(old_target);
1787     }
1788 }
1789
1790 static Object *object_resolve_link_property(Object *parent, void *opaque,
1791                                             const char *part)
1792 {
1793     LinkProperty *lprop = opaque;
1794
1795     return *object_link_get_targetp(parent, lprop);
1796 }
1797
1798 static void object_release_link_property(Object *obj, const char *name,
1799                                          void *opaque)
1800 {
1801     LinkProperty *prop = opaque;
1802     Object **targetp = object_link_get_targetp(obj, prop);
1803
1804     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1805         object_unref(*targetp);
1806     }
1807     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1808         g_free(prop);
1809     }
1810 }
1811
1812 static ObjectProperty *
1813 object_add_link_prop(Object *obj, const char *name,
1814                      const char *type, void *ptr,
1815                      void (*check)(const Object *, const char *,
1816                                    Object *, Error **),
1817                      ObjectPropertyLinkFlags flags)
1818 {
1819     LinkProperty *prop = g_malloc(sizeof(*prop));
1820     g_autofree char *full_type = NULL;
1821     ObjectProperty *op;
1822
1823     if (flags & OBJ_PROP_LINK_DIRECT) {
1824         prop->target = ptr;
1825     } else {
1826         prop->targetp = ptr;
1827     }
1828     prop->check = check;
1829     prop->flags = flags;
1830
1831     full_type = g_strdup_printf("link<%s>", type);
1832
1833     op = object_property_add(obj, name, full_type,
1834                              object_get_link_property,
1835                              check ? object_set_link_property : NULL,
1836                              object_release_link_property,
1837                              prop);
1838     op->resolve = object_resolve_link_property;
1839     return op;
1840 }
1841
1842 ObjectProperty *
1843 object_property_add_link(Object *obj, const char *name,
1844                          const char *type, Object **targetp,
1845                          void (*check)(const Object *, const char *,
1846                                        Object *, Error **),
1847                          ObjectPropertyLinkFlags flags)
1848 {
1849     return object_add_link_prop(obj, name, type, targetp, check, flags);
1850 }
1851
1852 ObjectProperty *
1853 object_class_property_add_link(ObjectClass *oc,
1854     const char *name,
1855     const char *type, ptrdiff_t offset,
1856     void (*check)(const Object *obj, const char *name,
1857                   Object *val, Error **errp),
1858     ObjectPropertyLinkFlags flags)
1859 {
1860     LinkProperty *prop = g_new0(LinkProperty, 1);
1861     char *full_type;
1862     ObjectProperty *op;
1863
1864     prop->offset = offset;
1865     prop->check = check;
1866     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1867
1868     full_type = g_strdup_printf("link<%s>", type);
1869
1870     op = object_class_property_add(oc, name, full_type,
1871                                    object_get_link_property,
1872                                    check ? object_set_link_property : NULL,
1873                                    object_release_link_property,
1874                                    prop);
1875
1876     op->resolve = object_resolve_link_property;
1877
1878     g_free(full_type);
1879     return op;
1880 }
1881
1882 ObjectProperty *
1883 object_property_add_const_link(Object *obj, const char *name,
1884                                Object *target)
1885 {
1886     return object_add_link_prop(obj, name,
1887                                 object_get_typename(target), target,
1888                                 NULL, OBJ_PROP_LINK_DIRECT);
1889 }
1890
1891 char *object_get_canonical_path_component(Object *obj)
1892 {
1893     ObjectProperty *prop = NULL;
1894     GHashTableIter iter;
1895
1896     if (obj->parent == NULL) {
1897         return NULL;
1898     }
1899
1900     g_hash_table_iter_init(&iter, obj->parent->properties);
1901     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1902         if (!object_property_is_child(prop)) {
1903             continue;
1904         }
1905
1906         if (prop->opaque == obj) {
1907             return g_strdup(prop->name);
1908         }
1909     }
1910
1911     /* obj had a parent but was not a child, should never happen */
1912     g_assert_not_reached();
1913     return NULL;
1914 }
1915
1916 char *object_get_canonical_path(Object *obj)
1917 {
1918     Object *root = object_get_root();
1919     char *newpath, *path = NULL;
1920
1921     if (obj == root) {
1922         return g_strdup("/");
1923     }
1924
1925     do {
1926         char *component = object_get_canonical_path_component(obj);
1927
1928         if (!component) {
1929             /* A canonical path must be complete, so discard what was
1930              * collected so far.
1931              */
1932             g_free(path);
1933             return NULL;
1934         }
1935
1936         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1937         g_free(path);
1938         g_free(component);
1939         path = newpath;
1940         obj = obj->parent;
1941     } while (obj != root);
1942
1943     return path;
1944 }
1945
1946 Object *object_resolve_path_component(Object *parent, const char *part)
1947 {
1948     ObjectProperty *prop = object_property_find(parent, part, NULL);
1949     if (prop == NULL) {
1950         return NULL;
1951     }
1952
1953     if (prop->resolve) {
1954         return prop->resolve(parent, prop->opaque, part);
1955     } else {
1956         return NULL;
1957     }
1958 }
1959
1960 static Object *object_resolve_abs_path(Object *parent,
1961                                        char **parts,
1962                                        const char *typename,
1963                                        int index)
1964 {
1965     Object *child;
1966
1967     if (parts[index] == NULL) {
1968         return object_dynamic_cast(parent, typename);
1969     }
1970
1971     if (strcmp(parts[index], "") == 0) {
1972         return object_resolve_abs_path(parent, parts, typename, index + 1);
1973     }
1974
1975     child = object_resolve_path_component(parent, parts[index]);
1976     if (!child) {
1977         return NULL;
1978     }
1979
1980     return object_resolve_abs_path(child, parts, typename, index + 1);
1981 }
1982
1983 static Object *object_resolve_partial_path(Object *parent,
1984                                            char **parts,
1985                                            const char *typename,
1986                                            bool *ambiguous)
1987 {
1988     Object *obj;
1989     GHashTableIter iter;
1990     ObjectProperty *prop;
1991
1992     obj = object_resolve_abs_path(parent, parts, typename, 0);
1993
1994     g_hash_table_iter_init(&iter, parent->properties);
1995     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1996         Object *found;
1997
1998         if (!object_property_is_child(prop)) {
1999             continue;
2000         }
2001
2002         found = object_resolve_partial_path(prop->opaque, parts,
2003                                             typename, ambiguous);
2004         if (found) {
2005             if (obj) {
2006                 *ambiguous = true;
2007                 return NULL;
2008             }
2009             obj = found;
2010         }
2011
2012         if (*ambiguous) {
2013             return NULL;
2014         }
2015     }
2016
2017     return obj;
2018 }
2019
2020 Object *object_resolve_path_type(const char *path, const char *typename,
2021                                  bool *ambiguousp)
2022 {
2023     Object *obj;
2024     char **parts;
2025
2026     parts = g_strsplit(path, "/", 0);
2027     assert(parts);
2028
2029     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2030         bool ambiguous = false;
2031         obj = object_resolve_partial_path(object_get_root(), parts,
2032                                           typename, &ambiguous);
2033         if (ambiguousp) {
2034             *ambiguousp = ambiguous;
2035         }
2036     } else {
2037         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
2038     }
2039
2040     g_strfreev(parts);
2041
2042     return obj;
2043 }
2044
2045 Object *object_resolve_path(const char *path, bool *ambiguous)
2046 {
2047     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2048 }
2049
2050 typedef struct StringProperty
2051 {
2052     char *(*get)(Object *, Error **);
2053     void (*set)(Object *, const char *, Error **);
2054 } StringProperty;
2055
2056 static void property_get_str(Object *obj, Visitor *v, const char *name,
2057                              void *opaque, Error **errp)
2058 {
2059     StringProperty *prop = opaque;
2060     char *value;
2061     Error *err = NULL;
2062
2063     value = prop->get(obj, &err);
2064     if (err) {
2065         error_propagate(errp, err);
2066         return;
2067     }
2068
2069     visit_type_str(v, name, &value, errp);
2070     g_free(value);
2071 }
2072
2073 static void property_set_str(Object *obj, Visitor *v, const char *name,
2074                              void *opaque, Error **errp)
2075 {
2076     StringProperty *prop = opaque;
2077     char *value;
2078     Error *local_err = NULL;
2079
2080     visit_type_str(v, name, &value, &local_err);
2081     if (local_err) {
2082         error_propagate(errp, local_err);
2083         return;
2084     }
2085
2086     prop->set(obj, value, errp);
2087     g_free(value);
2088 }
2089
2090 static void property_release_str(Object *obj, const char *name,
2091                                  void *opaque)
2092 {
2093     StringProperty *prop = opaque;
2094     g_free(prop);
2095 }
2096
2097 ObjectProperty *
2098 object_property_add_str(Object *obj, const char *name,
2099                         char *(*get)(Object *, Error **),
2100                         void (*set)(Object *, const char *, Error **))
2101 {
2102     StringProperty *prop = g_malloc0(sizeof(*prop));
2103
2104     prop->get = get;
2105     prop->set = set;
2106
2107     return object_property_add(obj, name, "string",
2108                                get ? property_get_str : NULL,
2109                                set ? property_set_str : NULL,
2110                                property_release_str,
2111                                prop);
2112 }
2113
2114 ObjectProperty *
2115 object_class_property_add_str(ObjectClass *klass, const char *name,
2116                                    char *(*get)(Object *, Error **),
2117                                    void (*set)(Object *, const char *,
2118                                                Error **))
2119 {
2120     StringProperty *prop = g_malloc0(sizeof(*prop));
2121
2122     prop->get = get;
2123     prop->set = set;
2124
2125     return object_class_property_add(klass, name, "string",
2126                                      get ? property_get_str : NULL,
2127                                      set ? property_set_str : NULL,
2128                                      NULL,
2129                                      prop);
2130 }
2131
2132 typedef struct BoolProperty
2133 {
2134     bool (*get)(Object *, Error **);
2135     void (*set)(Object *, bool, Error **);
2136 } BoolProperty;
2137
2138 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2139                               void *opaque, Error **errp)
2140 {
2141     BoolProperty *prop = opaque;
2142     bool value;
2143     Error *err = NULL;
2144
2145     value = prop->get(obj, &err);
2146     if (err) {
2147         error_propagate(errp, err);
2148         return;
2149     }
2150
2151     visit_type_bool(v, name, &value, errp);
2152 }
2153
2154 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2155                               void *opaque, Error **errp)
2156 {
2157     BoolProperty *prop = opaque;
2158     bool value;
2159     Error *local_err = NULL;
2160
2161     visit_type_bool(v, name, &value, &local_err);
2162     if (local_err) {
2163         error_propagate(errp, local_err);
2164         return;
2165     }
2166
2167     prop->set(obj, value, errp);
2168 }
2169
2170 static void property_release_bool(Object *obj, const char *name,
2171                                   void *opaque)
2172 {
2173     BoolProperty *prop = opaque;
2174     g_free(prop);
2175 }
2176
2177 ObjectProperty *
2178 object_property_add_bool(Object *obj, const char *name,
2179                          bool (*get)(Object *, Error **),
2180                          void (*set)(Object *, bool, Error **))
2181 {
2182     BoolProperty *prop = g_malloc0(sizeof(*prop));
2183
2184     prop->get = get;
2185     prop->set = set;
2186
2187     return object_property_add(obj, name, "bool",
2188                                get ? property_get_bool : NULL,
2189                                set ? property_set_bool : NULL,
2190                                property_release_bool,
2191                                prop);
2192 }
2193
2194 ObjectProperty *
2195 object_class_property_add_bool(ObjectClass *klass, const char *name,
2196                                     bool (*get)(Object *, Error **),
2197                                     void (*set)(Object *, bool, Error **))
2198 {
2199     BoolProperty *prop = g_malloc0(sizeof(*prop));
2200
2201     prop->get = get;
2202     prop->set = set;
2203
2204     return object_class_property_add(klass, name, "bool",
2205                                      get ? property_get_bool : NULL,
2206                                      set ? property_set_bool : NULL,
2207                                      NULL,
2208                                      prop);
2209 }
2210
2211 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2212                               void *opaque, Error **errp)
2213 {
2214     EnumProperty *prop = opaque;
2215     int value;
2216     Error *err = NULL;
2217
2218     value = prop->get(obj, &err);
2219     if (err) {
2220         error_propagate(errp, err);
2221         return;
2222     }
2223
2224     visit_type_enum(v, name, &value, prop->lookup, errp);
2225 }
2226
2227 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2228                               void *opaque, Error **errp)
2229 {
2230     EnumProperty *prop = opaque;
2231     int value;
2232     Error *err = NULL;
2233
2234     visit_type_enum(v, name, &value, prop->lookup, &err);
2235     if (err) {
2236         error_propagate(errp, err);
2237         return;
2238     }
2239     prop->set(obj, value, errp);
2240 }
2241
2242 static void property_release_enum(Object *obj, const char *name,
2243                                   void *opaque)
2244 {
2245     EnumProperty *prop = opaque;
2246     g_free(prop);
2247 }
2248
2249 ObjectProperty *
2250 object_property_add_enum(Object *obj, const char *name,
2251                          const char *typename,
2252                          const QEnumLookup *lookup,
2253                          int (*get)(Object *, Error **),
2254                          void (*set)(Object *, int, Error **))
2255 {
2256     EnumProperty *prop = g_malloc(sizeof(*prop));
2257
2258     prop->lookup = lookup;
2259     prop->get = get;
2260     prop->set = set;
2261
2262     return object_property_add(obj, name, typename,
2263                                get ? property_get_enum : NULL,
2264                                set ? property_set_enum : NULL,
2265                                property_release_enum,
2266                                prop);
2267 }
2268
2269 ObjectProperty *
2270 object_class_property_add_enum(ObjectClass *klass, const char *name,
2271                                     const char *typename,
2272                                     const QEnumLookup *lookup,
2273                                     int (*get)(Object *, Error **),
2274                                     void (*set)(Object *, int, Error **))
2275 {
2276     EnumProperty *prop = g_malloc(sizeof(*prop));
2277
2278     prop->lookup = lookup;
2279     prop->get = get;
2280     prop->set = set;
2281
2282     return object_class_property_add(klass, name, typename,
2283                                      get ? property_get_enum : NULL,
2284                                      set ? property_set_enum : NULL,
2285                                      NULL,
2286                                      prop);
2287 }
2288
2289 typedef struct TMProperty {
2290     void (*get)(Object *, struct tm *, Error **);
2291 } TMProperty;
2292
2293 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2294                             void *opaque, Error **errp)
2295 {
2296     TMProperty *prop = opaque;
2297     Error *err = NULL;
2298     struct tm value;
2299
2300     prop->get(obj, &value, &err);
2301     if (err) {
2302         goto out;
2303     }
2304
2305     visit_start_struct(v, name, NULL, 0, &err);
2306     if (err) {
2307         goto out;
2308     }
2309     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2310     if (err) {
2311         goto out_end;
2312     }
2313     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2314     if (err) {
2315         goto out_end;
2316     }
2317     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2318     if (err) {
2319         goto out_end;
2320     }
2321     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2322     if (err) {
2323         goto out_end;
2324     }
2325     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2326     if (err) {
2327         goto out_end;
2328     }
2329     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2330     if (err) {
2331         goto out_end;
2332     }
2333     visit_check_struct(v, &err);
2334 out_end:
2335     visit_end_struct(v, NULL);
2336 out:
2337     error_propagate(errp, err);
2338
2339 }
2340
2341 static void property_release_tm(Object *obj, const char *name,
2342                                 void *opaque)
2343 {
2344     TMProperty *prop = opaque;
2345     g_free(prop);
2346 }
2347
2348 ObjectProperty *
2349 object_property_add_tm(Object *obj, const char *name,
2350                        void (*get)(Object *, struct tm *, Error **))
2351 {
2352     TMProperty *prop = g_malloc0(sizeof(*prop));
2353
2354     prop->get = get;
2355
2356     return object_property_add(obj, name, "struct tm",
2357                                get ? property_get_tm : NULL, NULL,
2358                                property_release_tm,
2359                                prop);
2360 }
2361
2362 ObjectProperty *
2363 object_class_property_add_tm(ObjectClass *klass, const char *name,
2364                              void (*get)(Object *, struct tm *, Error **))
2365 {
2366     TMProperty *prop = g_malloc0(sizeof(*prop));
2367
2368     prop->get = get;
2369
2370     return object_class_property_add(klass, name, "struct tm",
2371                                      get ? property_get_tm : NULL,
2372                                      NULL, NULL, prop);
2373 }
2374
2375 static char *qdev_get_type(Object *obj, Error **errp)
2376 {
2377     return g_strdup(object_get_typename(obj));
2378 }
2379
2380 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2381                                    void *opaque, Error **errp)
2382 {
2383     uint8_t value = *(uint8_t *)opaque;
2384     visit_type_uint8(v, name, &value, errp);
2385 }
2386
2387 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2388                                    void *opaque, Error **errp)
2389 {
2390     uint8_t *field = opaque;
2391     uint8_t value;
2392     Error *local_err = NULL;
2393
2394     visit_type_uint8(v, name, &value, &local_err);
2395     if (local_err) {
2396         error_propagate(errp, local_err);
2397         return;
2398     }
2399
2400     *field = value;
2401 }
2402
2403 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2404                                     void *opaque, Error **errp)
2405 {
2406     uint16_t value = *(uint16_t *)opaque;
2407     visit_type_uint16(v, name, &value, errp);
2408 }
2409
2410 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2411                                     void *opaque, Error **errp)
2412 {
2413     uint16_t *field = opaque;
2414     uint16_t value;
2415     Error *local_err = NULL;
2416
2417     visit_type_uint16(v, name, &value, &local_err);
2418     if (local_err) {
2419         error_propagate(errp, local_err);
2420         return;
2421     }
2422
2423     *field = value;
2424 }
2425
2426 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2427                                     void *opaque, Error **errp)
2428 {
2429     uint32_t value = *(uint32_t *)opaque;
2430     visit_type_uint32(v, name, &value, errp);
2431 }
2432
2433 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2434                                     void *opaque, Error **errp)
2435 {
2436     uint32_t *field = opaque;
2437     uint32_t value;
2438     Error *local_err = NULL;
2439
2440     visit_type_uint32(v, name, &value, &local_err);
2441     if (local_err) {
2442         error_propagate(errp, local_err);
2443         return;
2444     }
2445
2446     *field = value;
2447 }
2448
2449 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2450                                     void *opaque, Error **errp)
2451 {
2452     uint64_t value = *(uint64_t *)opaque;
2453     visit_type_uint64(v, name, &value, errp);
2454 }
2455
2456 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2457                                     void *opaque, Error **errp)
2458 {
2459     uint64_t *field = opaque;
2460     uint64_t value;
2461     Error *local_err = NULL;
2462
2463     visit_type_uint64(v, name, &value, &local_err);
2464     if (local_err) {
2465         error_propagate(errp, local_err);
2466         return;
2467     }
2468
2469     *field = value;
2470 }
2471
2472 ObjectProperty *
2473 object_property_add_uint8_ptr(Object *obj, const char *name,
2474                               const uint8_t *v,
2475                               ObjectPropertyFlags flags)
2476 {
2477     ObjectPropertyAccessor *getter = NULL;
2478     ObjectPropertyAccessor *setter = NULL;
2479
2480     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2481         getter = property_get_uint8_ptr;
2482     }
2483
2484     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2485         setter = property_set_uint8_ptr;
2486     }
2487
2488     return object_property_add(obj, name, "uint8",
2489                                getter, setter, NULL, (void *)v);
2490 }
2491
2492 ObjectProperty *
2493 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2494                                     const uint8_t *v,
2495                                     ObjectPropertyFlags flags)
2496 {
2497     ObjectPropertyAccessor *getter = NULL;
2498     ObjectPropertyAccessor *setter = NULL;
2499
2500     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2501         getter = property_get_uint8_ptr;
2502     }
2503
2504     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2505         setter = property_set_uint8_ptr;
2506     }
2507
2508     return object_class_property_add(klass, name, "uint8",
2509                                      getter, setter, NULL, (void *)v);
2510 }
2511
2512 ObjectProperty *
2513 object_property_add_uint16_ptr(Object *obj, const char *name,
2514                                const uint16_t *v,
2515                                ObjectPropertyFlags flags)
2516 {
2517     ObjectPropertyAccessor *getter = NULL;
2518     ObjectPropertyAccessor *setter = NULL;
2519
2520     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2521         getter = property_get_uint16_ptr;
2522     }
2523
2524     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2525         setter = property_set_uint16_ptr;
2526     }
2527
2528     return object_property_add(obj, name, "uint16",
2529                                getter, setter, NULL, (void *)v);
2530 }
2531
2532 ObjectProperty *
2533 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2534                                      const uint16_t *v,
2535                                      ObjectPropertyFlags flags)
2536 {
2537     ObjectPropertyAccessor *getter = NULL;
2538     ObjectPropertyAccessor *setter = NULL;
2539
2540     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2541         getter = property_get_uint16_ptr;
2542     }
2543
2544     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2545         setter = property_set_uint16_ptr;
2546     }
2547
2548     return object_class_property_add(klass, name, "uint16",
2549                                      getter, setter, NULL, (void *)v);
2550 }
2551
2552 ObjectProperty *
2553 object_property_add_uint32_ptr(Object *obj, const char *name,
2554                                const uint32_t *v,
2555                                ObjectPropertyFlags flags)
2556 {
2557     ObjectPropertyAccessor *getter = NULL;
2558     ObjectPropertyAccessor *setter = NULL;
2559
2560     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2561         getter = property_get_uint32_ptr;
2562     }
2563
2564     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2565         setter = property_set_uint32_ptr;
2566     }
2567
2568     return object_property_add(obj, name, "uint32",
2569                                getter, setter, NULL, (void *)v);
2570 }
2571
2572 ObjectProperty *
2573 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2574                                      const uint32_t *v,
2575                                      ObjectPropertyFlags flags)
2576 {
2577     ObjectPropertyAccessor *getter = NULL;
2578     ObjectPropertyAccessor *setter = NULL;
2579
2580     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2581         getter = property_get_uint32_ptr;
2582     }
2583
2584     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2585         setter = property_set_uint32_ptr;
2586     }
2587
2588     return object_class_property_add(klass, name, "uint32",
2589                                      getter, setter, NULL, (void *)v);
2590 }
2591
2592 ObjectProperty *
2593 object_property_add_uint64_ptr(Object *obj, const char *name,
2594                                const uint64_t *v,
2595                                ObjectPropertyFlags flags)
2596 {
2597     ObjectPropertyAccessor *getter = NULL;
2598     ObjectPropertyAccessor *setter = NULL;
2599
2600     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2601         getter = property_get_uint64_ptr;
2602     }
2603
2604     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2605         setter = property_set_uint64_ptr;
2606     }
2607
2608     return object_property_add(obj, name, "uint64",
2609                                getter, setter, NULL, (void *)v);
2610 }
2611
2612 ObjectProperty *
2613 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2614                                      const uint64_t *v,
2615                                      ObjectPropertyFlags flags)
2616 {
2617     ObjectPropertyAccessor *getter = NULL;
2618     ObjectPropertyAccessor *setter = NULL;
2619
2620     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2621         getter = property_get_uint64_ptr;
2622     }
2623
2624     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2625         setter = property_set_uint64_ptr;
2626     }
2627
2628     return object_class_property_add(klass, name, "uint64",
2629                                      getter, setter, NULL, (void *)v);
2630 }
2631
2632 typedef struct {
2633     Object *target_obj;
2634     char *target_name;
2635 } AliasProperty;
2636
2637 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2638                                void *opaque, Error **errp)
2639 {
2640     AliasProperty *prop = opaque;
2641
2642     object_property_get(prop->target_obj, v, prop->target_name, errp);
2643 }
2644
2645 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2646                                void *opaque, Error **errp)
2647 {
2648     AliasProperty *prop = opaque;
2649
2650     object_property_set(prop->target_obj, v, prop->target_name, errp);
2651 }
2652
2653 static Object *property_resolve_alias(Object *obj, void *opaque,
2654                                       const char *part)
2655 {
2656     AliasProperty *prop = opaque;
2657
2658     return object_resolve_path_component(prop->target_obj, prop->target_name);
2659 }
2660
2661 static void property_release_alias(Object *obj, const char *name, void *opaque)
2662 {
2663     AliasProperty *prop = opaque;
2664
2665     g_free(prop->target_name);
2666     g_free(prop);
2667 }
2668
2669 ObjectProperty *
2670 object_property_add_alias(Object *obj, const char *name,
2671                           Object *target_obj, const char *target_name)
2672 {
2673     AliasProperty *prop;
2674     ObjectProperty *op;
2675     ObjectProperty *target_prop;
2676     g_autofree char *prop_type = NULL;
2677
2678     target_prop = object_property_find(target_obj, target_name,
2679                                        &error_abort);
2680
2681     if (object_property_is_child(target_prop)) {
2682         prop_type = g_strdup_printf("link%s",
2683                                     target_prop->type + strlen("child"));
2684     } else {
2685         prop_type = g_strdup(target_prop->type);
2686     }
2687
2688     prop = g_malloc(sizeof(*prop));
2689     prop->target_obj = target_obj;
2690     prop->target_name = g_strdup(target_name);
2691
2692     op = object_property_add(obj, name, prop_type,
2693                              property_get_alias,
2694                              property_set_alias,
2695                              property_release_alias,
2696                              prop);
2697     op->resolve = property_resolve_alias;
2698     if (target_prop->defval) {
2699         op->defval = qobject_ref(target_prop->defval);
2700     }
2701
2702     object_property_set_description(obj, op->name,
2703                                     target_prop->description);
2704     return op;
2705 }
2706
2707 void object_property_set_description(Object *obj, const char *name,
2708                                      const char *description)
2709 {
2710     ObjectProperty *op;
2711
2712     op = object_property_find(obj, name, &error_abort);
2713     g_free(op->description);
2714     op->description = g_strdup(description);
2715 }
2716
2717 void object_class_property_set_description(ObjectClass *klass,
2718                                            const char *name,
2719                                            const char *description)
2720 {
2721     ObjectProperty *op;
2722
2723     op = g_hash_table_lookup(klass->properties, name);
2724     g_free(op->description);
2725     op->description = g_strdup(description);
2726 }
2727
2728 static void object_class_init(ObjectClass *klass, void *data)
2729 {
2730     object_class_property_add_str(klass, "type", qdev_get_type,
2731                                   NULL);
2732 }
2733
2734 static void register_types(void)
2735 {
2736     static TypeInfo interface_info = {
2737         .name = TYPE_INTERFACE,
2738         .class_size = sizeof(InterfaceClass),
2739         .abstract = true,
2740     };
2741
2742     static TypeInfo object_info = {
2743         .name = TYPE_OBJECT,
2744         .instance_size = sizeof(Object),
2745         .class_init = object_class_init,
2746         .abstract = true,
2747     };
2748
2749     type_interface = type_register_internal(&interface_info);
2750     type_register_internal(&object_info);
2751 }
2752
2753 type_init(register_types)