qom/object.c

   1 /*
   2  * QEMU Object Model
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/qdev-core.h"
  15 #include "qapi/error.h"
  16 #include "qom/object.h"
  17 #include "qom/object_interfaces.h"
  18 #include "qemu/cutils.h"
  19 #include "qapi/visitor.h"
  20 #include "qapi/string-input-visitor.h"
  21 #include "qapi/string-output-visitor.h"
  22 #include "qapi/qobject-input-visitor.h"
  23 #include "qapi/qapi-builtin-visit.h"
  24 #include "qapi/qmp/qerror.h"
  25 #include "qapi/qmp/qjson.h"
  26 #include "trace.h"
  27
  28 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  29  * of the QOM core on QObject?  */
  30 #include "qom/qom-qobject.h"
  31 #include "qapi/qmp/qbool.h"
  32 #include "qapi/qmp/qnum.h"
  33 #include "qapi/qmp/qstring.h"
  34 #include "qemu/error-report.h"
  35
  36 #define MAX_INTERFACES 32
  37
  38 typedef struct InterfaceImpl InterfaceImpl;
  39 typedef struct TypeImpl TypeImpl;
  40
  41 struct InterfaceImpl
  42 {
  43     const char *typename;
  44 };
  45
  46 struct TypeImpl
  47 {
  48     const char *name;
  49
  50     size_t class_size;
  51
  52     size_t instance_size;
  53
  54     void (*class_init)(ObjectClass *klass, void *data);
  55     void (*class_base_init)(ObjectClass *klass, void *data);
  56
  57     void *class_data;
  58
  59     void (*instance_init)(Object *obj);
  60     void (*instance_post_init)(Object *obj);
  61     void (*instance_finalize)(Object *obj);
  62
  63     bool abstract;
  64
  65     const char *parent;
  66     TypeImpl *parent_type;
  67
  68     ObjectClass *class;
  69
  70     int num_interfaces;
  71     InterfaceImpl interfaces[MAX_INTERFACES];
  72 };
  73
  74 static Type type_interface;
  75
  76 static GHashTable *type_table_get(void)
  77 {
  78     static GHashTable *type_table;
  79
  80     if (type_table == NULL) {
  81         type_table = g_hash_table_new(g_str_hash, g_str_equal);
  82     }
  83
  84     return type_table;
  85 }
  86
  87 static bool enumerating_types;
  88
  89 static void type_table_add(TypeImpl *ti)
  90 {
  91     assert(!enumerating_types);
  92     g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
  93 }
  94
  95 static TypeImpl *type_table_lookup(const char *name)
  96 {
  97     return g_hash_table_lookup(type_table_get(), name);
  98 }
  99
 100 static TypeImpl *type_new(const TypeInfo *info)
 101 {
 102     TypeImpl *ti = g_malloc0(sizeof(*ti));
 103     int i;
 104
 105     g_assert(info->name != NULL);
 106
 107     if (type_table_lookup(info->name) != NULL) {
 108         fprintf(stderr, "Registering `%s' which already exists\n", info->name);
 109         abort();
 110     }
 111
 112     ti->name = g_strdup(info->name);
 113     ti->parent = g_strdup(info->parent);
 114
 115     ti->class_size = info->class_size;
 116     ti->instance_size = info->instance_size;
 117
 118     ti->class_init = info->class_init;
 119     ti->class_base_init = info->class_base_init;
 120     ti->class_data = info->class_data;
 121
 122     ti->instance_init = info->instance_init;
 123     ti->instance_post_init = info->instance_post_init;
 124     ti->instance_finalize = info->instance_finalize;
 125
 126     ti->abstract = info->abstract;
 127
 128     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 129         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 130     }
 131     ti->num_interfaces = i;
 132
 133     return ti;
 134 }
 135
 136 static TypeImpl *type_register_internal(const TypeInfo *info)
 137 {
 138     TypeImpl *ti;
 139     ti = type_new(info);
 140
 141     type_table_add(ti);
 142     return ti;
 143 }
 144
 145 TypeImpl *type_register(const TypeInfo *info)
 146 {
 147     assert(info->parent);
 148     return type_register_internal(info);
 149 }
 150
 151 TypeImpl *type_register_static(const TypeInfo *info)
 152 {
 153     return type_register(info);
 154 }
 155
 156 void type_register_static_array(const TypeInfo *infos, int nr_infos)
 157 {
 158     int i;
 159
 160     for (i = 0; i < nr_infos; i++) {
 161         type_register_static(&infos[i]);
 162     }
 163 }
 164
 165 static TypeImpl *type_get_by_name(const char *name)
 166 {
 167     if (name == NULL) {
 168         return NULL;
 169     }
 170
 171     return type_table_lookup(name);
 172 }
 173
 174 static TypeImpl *type_get_parent(TypeImpl *type)
 175 {
 176     if (!type->parent_type && type->parent) {
 177         type->parent_type = type_get_by_name(type->parent);
 178         if (!type->parent_type) {
 179             fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
 180                     type->name, type->parent);
 181             abort();
 182         }
 183     }
 184
 185     return type->parent_type;
 186 }
 187
 188 static bool type_has_parent(TypeImpl *type)
 189 {
 190     return (type->parent != NULL);
 191 }
 192
 193 static size_t type_class_get_size(TypeImpl *ti)
 194 {
 195     if (ti->class_size) {
 196         return ti->class_size;
 197     }
 198
 199     if (type_has_parent(ti)) {
 200         return type_class_get_size(type_get_parent(ti));
 201     }
 202
 203     return sizeof(ObjectClass);
 204 }
 205
 206 static size_t type_object_get_size(TypeImpl *ti)
 207 {
 208     if (ti->instance_size) {
 209         return ti->instance_size;
 210     }
 211
 212     if (type_has_parent(ti)) {
 213         return type_object_get_size(type_get_parent(ti));
 214     }
 215
 216     return 0;
 217 }
 218
 219 size_t object_type_get_instance_size(const char *typename)
 220 {
 221     TypeImpl *type = type_get_by_name(typename);
 222
 223     g_assert(type != NULL);
 224     return type_object_get_size(type);
 225 }
 226
 227 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 228 {
 229     assert(target_type);
 230
 231     /* Check if target_type is a direct ancestor of type */
 232     while (type) {
 233         if (type == target_type) {
 234             return true;
 235         }
 236
 237         type = type_get_parent(type);
 238     }
 239
 240     return false;
 241 }
 242
 243 static void type_initialize(TypeImpl *ti);
 244
 245 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 246                                       TypeImpl *parent_type)
 247 {
 248     InterfaceClass *new_iface;
 249     TypeInfo info = { };
 250     TypeImpl *iface_impl;
 251
 252     info.parent = parent_type->name;
 253     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 254     info.abstract = true;
 255
 256     iface_impl = type_new(&info);
 257     iface_impl->parent_type = parent_type;
 258     type_initialize(iface_impl);
 259     g_free((char *)info.name);
 260
 261     new_iface = (InterfaceClass *)iface_impl->class;
 262     new_iface->concrete_class = ti->class;
 263     new_iface->interface_type = interface_type;
 264
 265     ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface);
 266 }
 267
 268 static void object_property_free(gpointer data)
 269 {
 270     ObjectProperty *prop = data;
 271
 272     if (prop->defval) {
 273         qobject_unref(prop->defval);
 274         prop->defval = NULL;
 275     }
 276     g_free(prop->name);
 277     g_free(prop->type);
 278     g_free(prop->description);
 279     g_free(prop);
 280 }
 281
 282 static void type_initialize(TypeImpl *ti)
 283 {
 284     TypeImpl *parent;
 285
 286     if (ti->class) {
 287         return;
 288     }
 289
 290     ti->class_size = type_class_get_size(ti);
 291     ti->instance_size = type_object_get_size(ti);
 292     /* Any type with zero instance_size is implicitly abstract.
 293      * This means interface types are all abstract.
 294      */
 295     if (ti->instance_size == 0) {
 296         ti->abstract = true;
 297     }
 298     if (type_is_ancestor(ti, type_interface)) {
 299         assert(ti->instance_size == 0);
 300         assert(ti->abstract);
 301         assert(!ti->instance_init);
 302         assert(!ti->instance_post_init);
 303         assert(!ti->instance_finalize);
 304         assert(!ti->num_interfaces);
 305     }
 306     ti->class = g_malloc0(ti->class_size);
 307
 308     parent = type_get_parent(ti);
 309     if (parent) {
 310         type_initialize(parent);
 311         GSList *e;
 312         int i;
 313
 314         g_assert(parent->class_size <= ti->class_size);
 315         g_assert(parent->instance_size <= ti->instance_size);
 316         memcpy(ti->class, parent->class, parent->class_size);
 317         ti->class->interfaces = NULL;
 318
 319         for (e = parent->class->interfaces; e; e = e->next) {
 320             InterfaceClass *iface = e->data;
 321             ObjectClass *klass = OBJECT_CLASS(iface);
 322
 323             type_initialize_interface(ti, iface->interface_type, klass->type);
 324         }
 325
 326         for (i = 0; i < ti->num_interfaces; i++) {
 327             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 328             if (!t) {
 329                 error_report("missing interface '%s' for object '%s'",
 330                              ti->interfaces[i].typename, parent->name);
 331                 abort();
 332             }
 333             for (e = ti->class->interfaces; e; e = e->next) {
 334                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 335
 336                 if (type_is_ancestor(target_type, t)) {
 337                     break;
 338                 }
 339             }
 340
 341             if (e) {
 342                 continue;
 343             }
 344
 345             type_initialize_interface(ti, t, t);
 346         }
 347     }
 348
 349     ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
 350                                                   object_property_free);
 351
 352     ti->class->type = ti;
 353
 354     while (parent) {
 355         if (parent->class_base_init) {
 356             parent->class_base_init(ti->class, ti->class_data);
 357         }
 358         parent = type_get_parent(parent);
 359     }
 360
 361     if (ti->class_init) {
 362         ti->class_init(ti->class, ti->class_data);
 363     }
 364 }
 365
 366 static void object_init_with_type(Object *obj, TypeImpl *ti)
 367 {
 368     if (type_has_parent(ti)) {
 369         object_init_with_type(obj, type_get_parent(ti));
 370     }
 371
 372     if (ti->instance_init) {
 373         ti->instance_init(obj);
 374     }
 375 }
 376
 377 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 378 {
 379     if (ti->instance_post_init) {
 380         ti->instance_post_init(obj);
 381     }
 382
 383     if (type_has_parent(ti)) {
 384         object_post_init_with_type(obj, type_get_parent(ti));
 385     }
 386 }
 387
 388 void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp)
 389 {
 390     int i;
 391
 392     if (!props) {
 393         return;
 394     }
 395
 396     for (i = 0; i < props->len; i++) {
 397         GlobalProperty *p = g_ptr_array_index(props, i);
 398         Error *err = NULL;
 399
 400         if (object_dynamic_cast(obj, p->driver) == NULL) {
 401             continue;
 402         }
 403         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 404             continue;
 405         }
 406         p->used = true;
 407         object_property_parse(obj, p->value, p->property, &err);
 408         if (err != NULL) {
 409             error_prepend(&err, "can't apply global %s.%s=%s: ",
 410                           p->driver, p->property, p->value);
 411             /*
 412              * If errp != NULL, propagate error and return.
 413              * If errp == NULL, report a warning, but keep going
 414              * with the remaining globals.
 415              */
 416             if (errp) {
 417                 error_propagate(errp, err);
 418                 return;
 419             } else {
 420                 warn_report_err(err);
 421             }
 422         }
 423     }
 424 }
 425
 426 /*
 427  * Global property defaults
 428  * Slot 0: accelerator's global property defaults
 429  * Slot 1: machine's global property defaults
 430  * Slot 2: global properties from legacy command line option
 431  * Each is a GPtrArray of of GlobalProperty.
 432  * Applied in order, later entries override earlier ones.
 433  */
 434 static GPtrArray *object_compat_props[3];
 435
 436 /*
 437  * Retrieve @GPtrArray for global property defined with options
 438  * other than "-global".  These are generally used for syntactic
 439  * sugar and legacy command line options.
 440  */
 441 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 442 {
 443     GlobalProperty *g;
 444     if (!object_compat_props[2]) {
 445         object_compat_props[2] = g_ptr_array_new();
 446     }
 447     g = g_new0(GlobalProperty, 1);
 448     g->driver = g_strdup(driver);
 449     g->property = g_strdup(prop);
 450     g->value = g_strdup(value);
 451     g_ptr_array_add(object_compat_props[2], g);
 452 }
 453
 454 /*
 455  * Set machine's global property defaults to @compat_props.
 456  * May be called at most once.
 457  */
 458 void object_set_machine_compat_props(GPtrArray *compat_props)
 459 {
 460     assert(!object_compat_props[1]);
 461     object_compat_props[1] = compat_props;
 462 }
 463
 464 /*
 465  * Set accelerator's global property defaults to @compat_props.
 466  * May be called at most once.
 467  */
 468 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 469 {
 470     assert(!object_compat_props[0]);
 471     object_compat_props[0] = compat_props;
 472 }
 473
 474 void object_apply_compat_props(Object *obj)
 475 {
 476     int i;
 477
 478     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 479         object_apply_global_props(obj, object_compat_props[i],
 480                                   i == 2 ? &error_fatal : &error_abort);
 481     }
 482 }
 483
 484 static void object_class_property_init_all(Object *obj)
 485 {
 486     ObjectPropertyIterator iter;
 487     ObjectProperty *prop;
 488
 489     object_class_property_iter_init(&iter, object_get_class(obj));
 490     while ((prop = object_property_iter_next(&iter))) {
 491         if (prop->init) {
 492             prop->init(obj, prop);
 493         }
 494     }
 495 }
 496
 497 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
 498 {
 499     type_initialize(type);
 500
 501     g_assert(type->instance_size >= sizeof(Object));
 502     g_assert(type->abstract == false);
 503     g_assert(size >= type->instance_size);
 504
 505     memset(obj, 0, type->instance_size);
 506     obj->class = type->class;
 507     object_ref(obj);
 508     object_class_property_init_all(obj);
 509     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 510                                             NULL, object_property_free);
 511     object_init_with_type(obj, type);
 512     object_post_init_with_type(obj, type);
 513 }
 514
 515 void object_initialize(void *data, size_t size, const char *typename)
 516 {
 517     TypeImpl *type = type_get_by_name(typename);
 518
 519     if (!type) {
 520         error_report("missing object type '%s'", typename);
 521         abort();
 522     }
 523
 524     object_initialize_with_type(data, size, type);
 525 }
 526
 527 void object_initialize_child(Object *parentobj, const char *propname,
 528                              void *childobj, size_t size, const char *type,
 529                              Error **errp, ...)
 530 {
 531     va_list vargs;
 532
 533     va_start(vargs, errp);
 534     object_initialize_childv(parentobj, propname, childobj, size, type, errp,
 535                              vargs);
 536     va_end(vargs);
 537 }
 538
 539 void object_initialize_childv(Object *parentobj, const char *propname,
 540                               void *childobj, size_t size, const char *type,
 541                               Error **errp, va_list vargs)
 542 {
 543     Error *local_err = NULL;
 544     Object *obj;
 545     UserCreatable *uc;
 546
 547     object_initialize(childobj, size, type);
 548     obj = OBJECT(childobj);
 549
 550     object_set_propv(obj, &local_err, vargs);
 551     if (local_err) {
 552         goto out;
 553     }
 554
 555     object_property_add_child(parentobj, propname, obj);
 556
 557     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 558     if (uc) {
 559         user_creatable_complete(uc, &local_err);
 560         if (local_err) {
 561             object_unparent(obj);
 562             goto out;
 563         }
 564     }
 565
 566 out:
 567     /*
 568      * We want @obj's reference to be 1 on success, 0 on failure.
 569      * On success, it's 2: one taken by object_initialize(), and one
 570      * by object_property_add_child().
 571      * On failure in object_initialize() or earlier, it's 1.
 572      * On failure afterwards, it's also 1: object_unparent() releases
 573      * the reference taken by object_property_add_child().
 574      */
 575     object_unref(obj);
 576
 577     error_propagate(errp, local_err);
 578 }
 579
 580 static inline bool object_property_is_child(ObjectProperty *prop)
 581 {
 582     return strstart(prop->type, "child<", NULL);
 583 }
 584
 585 static void object_property_del_all(Object *obj)
 586 {
 587     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 588     ObjectProperty *prop;
 589     ObjectPropertyIterator iter;
 590     bool released;
 591
 592     do {
 593         released = false;
 594         object_property_iter_init(&iter, obj);
 595         while ((prop = object_property_iter_next(&iter)) != NULL) {
 596             if (g_hash_table_add(done, prop)) {
 597                 if (prop->release) {
 598                     prop->release(obj, prop->name, prop->opaque);
 599                     released = true;
 600                     break;
 601                 }
 602             }
 603         }
 604     } while (released);
 605
 606     g_hash_table_unref(obj->properties);
 607 }
 608
 609 static void object_property_del_child(Object *obj, Object *child)
 610 {
 611     ObjectProperty *prop;
 612     GHashTableIter iter;
 613     gpointer key, value;
 614
 615     g_hash_table_iter_init(&iter, obj->properties);
 616     while (g_hash_table_iter_next(&iter, &key, &value)) {
 617         prop = value;
 618         if (object_property_is_child(prop) && prop->opaque == child) {
 619             if (prop->release) {
 620                 prop->release(obj, prop->name, prop->opaque);
 621                 prop->release = NULL;
 622             }
 623             break;
 624         }
 625     }
 626     g_hash_table_iter_init(&iter, obj->properties);
 627     while (g_hash_table_iter_next(&iter, &key, &value)) {
 628         prop = value;
 629         if (object_property_is_child(prop) && prop->opaque == child) {
 630             g_hash_table_iter_remove(&iter);
 631             break;
 632         }
 633     }
 634 }
 635
 636 void object_unparent(Object *obj)
 637 {
 638     if (obj->parent) {
 639         object_property_del_child(obj->parent, obj);
 640     }
 641 }
 642
 643 static void object_deinit(Object *obj, TypeImpl *type)
 644 {
 645     if (type->instance_finalize) {
 646         type->instance_finalize(obj);
 647     }
 648
 649     if (type_has_parent(type)) {
 650         object_deinit(obj, type_get_parent(type));
 651     }
 652 }
 653
 654 static void object_finalize(void *data)
 655 {
 656     Object *obj = data;
 657     TypeImpl *ti = obj->class->type;
 658
 659     object_property_del_all(obj);
 660     object_deinit(obj, ti);
 661
 662     g_assert(obj->ref == 0);
 663     if (obj->free) {
 664         obj->free(obj);
 665     }
 666 }
 667
 668 static Object *object_new_with_type(Type type)
 669 {
 670     Object *obj;
 671
 672     g_assert(type != NULL);
 673     type_initialize(type);
 674
 675     obj = g_malloc(type->instance_size);
 676     object_initialize_with_type(obj, type->instance_size, type);
 677     obj->free = g_free;
 678
 679     return obj;
 680 }
 681
 682 Object *object_new_with_class(ObjectClass *klass)
 683 {
 684     return object_new_with_type(klass->type);
 685 }
 686
 687 Object *object_new(const char *typename)
 688 {
 689     TypeImpl *ti = type_get_by_name(typename);
 690
 691     return object_new_with_type(ti);
 692 }
 693
 694
 695 Object *object_new_with_props(const char *typename,
 696                               Object *parent,
 697                               const char *id,
 698                               Error **errp,
 699                               ...)
 700 {
 701     va_list vargs;
 702     Object *obj;
 703
 704     va_start(vargs, errp);
 705     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 706     va_end(vargs);
 707
 708     return obj;
 709 }
 710
 711
 712 Object *object_new_with_propv(const char *typename,
 713                               Object *parent,
 714                               const char *id,
 715                               Error **errp,
 716                               va_list vargs)
 717 {
 718     Object *obj;
 719     ObjectClass *klass;
 720     Error *local_err = NULL;
 721     UserCreatable *uc;
 722
 723     klass = object_class_by_name(typename);
 724     if (!klass) {
 725         error_setg(errp, "invalid object type: %s", typename);
 726         return NULL;
 727     }
 728
 729     if (object_class_is_abstract(klass)) {
 730         error_setg(errp, "object type '%s' is abstract", typename);
 731         return NULL;
 732     }
 733     obj = object_new_with_type(klass->type);
 734
 735     if (object_set_propv(obj, &local_err, vargs) < 0) {
 736         goto error;
 737     }
 738
 739     if (id != NULL) {
 740         object_property_add_child(parent, id, obj);
 741     }
 742
 743     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 744     if (uc) {
 745         user_creatable_complete(uc, &local_err);
 746         if (local_err) {
 747             if (id != NULL) {
 748                 object_unparent(obj);
 749             }
 750             goto error;
 751         }
 752     }
 753
 754     object_unref(obj);
 755     return obj;
 756
 757  error:
 758     error_propagate(errp, local_err);
 759     object_unref(obj);
 760     return NULL;
 761 }
 762
 763
 764 int object_set_props(Object *obj,
 765                      Error **errp,
 766                      ...)
 767 {
 768     va_list vargs;
 769     int ret;
 770
 771     va_start(vargs, errp);
 772     ret = object_set_propv(obj, errp, vargs);
 773     va_end(vargs);
 774
 775     return ret;
 776 }
 777
 778
 779 int object_set_propv(Object *obj,
 780                      Error **errp,
 781                      va_list vargs)
 782 {
 783     const char *propname;
 784     Error *local_err = NULL;
 785
 786     propname = va_arg(vargs, char *);
 787     while (propname != NULL) {
 788         const char *value = va_arg(vargs, char *);
 789
 790         g_assert(value != NULL);
 791         object_property_parse(obj, value, propname, &local_err);
 792         if (local_err) {
 793             error_propagate(errp, local_err);
 794             return -1;
 795         }
 796         propname = va_arg(vargs, char *);
 797     }
 798
 799     return 0;
 800 }
 801
 802
 803 Object *object_dynamic_cast(Object *obj, const char *typename)
 804 {
 805     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 806         return obj;
 807     }
 808
 809     return NULL;
 810 }
 811
 812 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 813                                    const char *file, int line, const char *func)
 814 {
 815     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 816                                      typename, file, line, func);
 817
 818 #ifdef CONFIG_QOM_CAST_DEBUG
 819     int i;
 820     Object *inst;
 821
 822     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 823         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 824             goto out;
 825         }
 826     }
 827
 828     inst = object_dynamic_cast(obj, typename);
 829
 830     if (!inst && obj) {
 831         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 832                 file, line, func, obj, typename);
 833         abort();
 834     }
 835
 836     assert(obj == inst);
 837
 838     if (obj && obj == inst) {
 839         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 840             atomic_set(&obj->class->object_cast_cache[i - 1],
 841                        atomic_read(&obj->class->object_cast_cache[i]));
 842         }
 843         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 844     }
 845
 846 out:
 847 #endif
 848     return obj;
 849 }
 850
 851 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 852                                        const char *typename)
 853 {
 854     ObjectClass *ret = NULL;
 855     TypeImpl *target_type;
 856     TypeImpl *type;
 857
 858     if (!class) {
 859         return NULL;
 860     }
 861
 862     /* A simple fast path that can trigger a lot for leaf classes.  */
 863     type = class->type;
 864     if (type->name == typename) {
 865         return class;
 866     }
 867
 868     target_type = type_get_by_name(typename);
 869     if (!target_type) {
 870         /* target class type unknown, so fail the cast */
 871         return NULL;
 872     }
 873
 874     if (type->class->interfaces &&
 875             type_is_ancestor(target_type, type_interface)) {
 876         int found = 0;
 877         GSList *i;
 878
 879         for (i = class->interfaces; i; i = i->next) {
 880             ObjectClass *target_class = i->data;
 881
 882             if (type_is_ancestor(target_class->type, target_type)) {
 883                 ret = target_class;
 884                 found++;
 885             }
 886          }
 887
 888         /* The match was ambiguous, don't allow a cast */
 889         if (found > 1) {
 890             ret = NULL;
 891         }
 892     } else if (type_is_ancestor(type, target_type)) {
 893         ret = class;
 894     }
 895
 896     return ret;
 897 }
 898
 899 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 900                                               const char *typename,
 901                                               const char *file, int line,
 902                                               const char *func)
 903 {
 904     ObjectClass *ret;
 905
 906     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 907                                            typename, file, line, func);
 908
 909 #ifdef CONFIG_QOM_CAST_DEBUG
 910     int i;
 911
 912     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 913         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 914             ret = class;
 915             goto out;
 916         }
 917     }
 918 #else
 919     if (!class || !class->interfaces) {
 920         return class;
 921     }
 922 #endif
 923
 924     ret = object_class_dynamic_cast(class, typename);
 925     if (!ret && class) {
 926         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 927                 file, line, func, class, typename);
 928         abort();
 929     }
 930
 931 #ifdef CONFIG_QOM_CAST_DEBUG
 932     if (class && ret == class) {
 933         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 934             atomic_set(&class->class_cast_cache[i - 1],
 935                        atomic_read(&class->class_cast_cache[i]));
 936         }
 937         atomic_set(&class->class_cast_cache[i - 1], typename);
 938     }
 939 out:
 940 #endif
 941     return ret;
 942 }
 943
 944 const char *object_get_typename(const Object *obj)
 945 {
 946     return obj->class->type->name;
 947 }
 948
 949 ObjectClass *object_get_class(Object *obj)
 950 {
 951     return obj->class;
 952 }
 953
 954 bool object_class_is_abstract(ObjectClass *klass)
 955 {
 956     return klass->type->abstract;
 957 }
 958
 959 const char *object_class_get_name(ObjectClass *klass)
 960 {
 961     return klass->type->name;
 962 }
 963
 964 ObjectClass *object_class_by_name(const char *typename)
 965 {
 966     TypeImpl *type = type_get_by_name(typename);
 967
 968     if (!type) {
 969         return NULL;
 970     }
 971
 972     type_initialize(type);
 973
 974     return type->class;
 975 }
 976
 977 ObjectClass *object_class_get_parent(ObjectClass *class)
 978 {
 979     TypeImpl *type = type_get_parent(class->type);
 980
 981     if (!type) {
 982         return NULL;
 983     }
 984
 985     type_initialize(type);
 986
 987     return type->class;
 988 }
 989
 990 typedef struct OCFData
 991 {
 992     void (*fn)(ObjectClass *klass, void *opaque);
 993     const char *implements_type;
 994     bool include_abstract;
 995     void *opaque;
 996 } OCFData;
 997
 998 static void object_class_foreach_tramp(gpointer key, gpointer value,
 999                                        gpointer opaque)
1000 {
1001     OCFData *data = opaque;
1002     TypeImpl *type = value;
1003     ObjectClass *k;
1004
1005     type_initialize(type);
1006     k = type->class;
1007
1008     if (!data->include_abstract && type->abstract) {
1009         return;
1010     }
1011
1012     if (data->implements_type &&
1013         !object_class_dynamic_cast(k, data->implements_type)) {
1014         return;
1015     }
1016
1017     data->fn(k, data->opaque);
1018 }
1019
1020 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1021                           const char *implements_type, bool include_abstract,
1022                           void *opaque)
1023 {
1024     OCFData data = { fn, implements_type, include_abstract, opaque };
1025
1026     enumerating_types = true;
1027     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1028     enumerating_types = false;
1029 }
1030
1031 static int do_object_child_foreach(Object *obj,
1032                                    int (*fn)(Object *child, void *opaque),
1033                                    void *opaque, bool recurse)
1034 {
1035     GHashTableIter iter;
1036     ObjectProperty *prop;
1037     int ret = 0;
1038
1039     g_hash_table_iter_init(&iter, obj->properties);
1040     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1041         if (object_property_is_child(prop)) {
1042             Object *child = prop->opaque;
1043
1044             ret = fn(child, opaque);
1045             if (ret != 0) {
1046                 break;
1047             }
1048             if (recurse) {
1049                 ret = do_object_child_foreach(child, fn, opaque, true);
1050                 if (ret != 0) {
1051                     break;
1052                 }
1053             }
1054         }
1055     }
1056     return ret;
1057 }
1058
1059 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1060                          void *opaque)
1061 {
1062     return do_object_child_foreach(obj, fn, opaque, false);
1063 }
1064
1065 int object_child_foreach_recursive(Object *obj,
1066                                    int (*fn)(Object *child, void *opaque),
1067                                    void *opaque)
1068 {
1069     return do_object_child_foreach(obj, fn, opaque, true);
1070 }
1071
1072 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1073 {
1074     GSList **list = opaque;
1075
1076     *list = g_slist_prepend(*list, klass);
1077 }
1078
1079 GSList *object_class_get_list(const char *implements_type,
1080                               bool include_abstract)
1081 {
1082     GSList *list = NULL;
1083
1084     object_class_foreach(object_class_get_list_tramp,
1085                          implements_type, include_abstract, &list);
1086     return list;
1087 }
1088
1089 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1090 {
1091     return strcasecmp(object_class_get_name((ObjectClass *)a),
1092                       object_class_get_name((ObjectClass *)b));
1093 }
1094
1095 GSList *object_class_get_list_sorted(const char *implements_type,
1096                                      bool include_abstract)
1097 {
1098     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1099                         object_class_cmp);
1100 }
1101
1102 Object *object_ref(Object *obj)
1103 {
1104     if (!obj) {
1105         return NULL;
1106     }
1107     atomic_inc(&obj->ref);
1108     return obj;
1109 }
1110
1111 void object_unref(Object *obj)
1112 {
1113     if (!obj) {
1114         return;
1115     }
1116     g_assert(obj->ref > 0);
1117
1118     /* parent always holds a reference to its children */
1119     if (atomic_fetch_dec(&obj->ref) == 1) {
1120         object_finalize(obj);
1121     }
1122 }
1123
1124 static ObjectProperty *
1125 object_property_try_add(Object *obj, const char *name, const char *type,
1126                         ObjectPropertyAccessor *get,
1127                         ObjectPropertyAccessor *set,
1128                         ObjectPropertyRelease *release,
1129                         void *opaque, Error **errp)
1130 {
1131     ObjectProperty *prop;
1132     size_t name_len = strlen(name);
1133
1134     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1135         int i;
1136         ObjectProperty *ret;
1137         char *name_no_array = g_strdup(name);
1138
1139         name_no_array[name_len - 3] = '\0';
1140         for (i = 0; ; ++i) {
1141             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1142
1143             ret = object_property_try_add(obj, full_name, type, get, set,
1144                                           release, opaque, NULL);
1145             g_free(full_name);
1146             if (ret) {
1147                 break;
1148             }
1149         }
1150         g_free(name_no_array);
1151         return ret;
1152     }
1153
1154     if (object_property_find(obj, name, NULL) != NULL) {
1155         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1156                    name, object_get_typename(obj));
1157         return NULL;
1158     }
1159
1160     prop = g_malloc0(sizeof(*prop));
1161
1162     prop->name = g_strdup(name);
1163     prop->type = g_strdup(type);
1164
1165     prop->get = get;
1166     prop->set = set;
1167     prop->release = release;
1168     prop->opaque = opaque;
1169
1170     g_hash_table_insert(obj->properties, prop->name, prop);
1171     return prop;
1172 }
1173
1174 ObjectProperty *
1175 object_property_add(Object *obj, const char *name, const char *type,
1176                     ObjectPropertyAccessor *get,
1177                     ObjectPropertyAccessor *set,
1178                     ObjectPropertyRelease *release,
1179                     void *opaque)
1180 {
1181     return object_property_try_add(obj, name, type, get, set, release,
1182                                    opaque, &error_abort);
1183 }
1184
1185 ObjectProperty *
1186 object_class_property_add(ObjectClass *klass,
1187                           const char *name,
1188                           const char *type,
1189                           ObjectPropertyAccessor *get,
1190                           ObjectPropertyAccessor *set,
1191                           ObjectPropertyRelease *release,
1192                           void *opaque)
1193 {
1194     ObjectProperty *prop;
1195
1196     assert(!object_class_property_find(klass, name, NULL));
1197
1198     prop = g_malloc0(sizeof(*prop));
1199
1200     prop->name = g_strdup(name);
1201     prop->type = g_strdup(type);
1202
1203     prop->get = get;
1204     prop->set = set;
1205     prop->release = release;
1206     prop->opaque = opaque;
1207
1208     g_hash_table_insert(klass->properties, prop->name, prop);
1209
1210     return prop;
1211 }
1212
1213 ObjectProperty *object_property_find(Object *obj, const char *name,
1214                                      Error **errp)
1215 {
1216     ObjectProperty *prop;
1217     ObjectClass *klass = object_get_class(obj);
1218
1219     prop = object_class_property_find(klass, name, NULL);
1220     if (prop) {
1221         return prop;
1222     }
1223
1224     prop = g_hash_table_lookup(obj->properties, name);
1225     if (prop) {
1226         return prop;
1227     }
1228
1229     error_setg(errp, "Property '.%s' not found", name);
1230     return NULL;
1231 }
1232
1233 void object_property_iter_init(ObjectPropertyIterator *iter,
1234                                Object *obj)
1235 {
1236     g_hash_table_iter_init(&iter->iter, obj->properties);
1237     iter->nextclass = object_get_class(obj);
1238 }
1239
1240 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1241 {
1242     gpointer key, val;
1243     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1244         if (!iter->nextclass) {
1245             return NULL;
1246         }
1247         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1248         iter->nextclass = object_class_get_parent(iter->nextclass);
1249     }
1250     return val;
1251 }
1252
1253 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1254                                      ObjectClass *klass)
1255 {
1256     g_hash_table_iter_init(&iter->iter, klass->properties);
1257     iter->nextclass = object_class_get_parent(klass);
1258 }
1259
1260 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1261                                            Error **errp)
1262 {
1263     ObjectProperty *prop;
1264     ObjectClass *parent_klass;
1265
1266     parent_klass = object_class_get_parent(klass);
1267     if (parent_klass) {
1268         prop = object_class_property_find(parent_klass, name, NULL);
1269         if (prop) {
1270             return prop;
1271         }
1272     }
1273
1274     prop = g_hash_table_lookup(klass->properties, name);
1275     if (!prop) {
1276         error_setg(errp, "Property '.%s' not found", name);
1277     }
1278     return prop;
1279 }
1280
1281 void object_property_del(Object *obj, const char *name)
1282 {
1283     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1284
1285     if (prop->release) {
1286         prop->release(obj, name, prop->opaque);
1287     }
1288     g_hash_table_remove(obj->properties, name);
1289 }
1290
1291 void object_property_get(Object *obj, Visitor *v, const char *name,
1292                          Error **errp)
1293 {
1294     ObjectProperty *prop = object_property_find(obj, name, errp);
1295     if (prop == NULL) {
1296         return;
1297     }
1298
1299     if (!prop->get) {
1300         error_setg(errp, QERR_PERMISSION_DENIED);
1301     } else {
1302         prop->get(obj, v, name, prop->opaque, errp);
1303     }
1304 }
1305
1306 void object_property_set(Object *obj, Visitor *v, const char *name,
1307                          Error **errp)
1308 {
1309     ObjectProperty *prop = object_property_find(obj, name, errp);
1310     if (prop == NULL) {
1311         return;
1312     }
1313
1314     if (!prop->set) {
1315         error_setg(errp, QERR_PERMISSION_DENIED);
1316     } else {
1317         prop->set(obj, v, name, prop->opaque, errp);
1318     }
1319 }
1320
1321 void object_property_set_str(Object *obj, const char *value,
1322                              const char *name, Error **errp)
1323 {
1324     QString *qstr = qstring_from_str(value);
1325     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1326
1327     qobject_unref(qstr);
1328 }
1329
1330 char *object_property_get_str(Object *obj, const char *name,
1331                               Error **errp)
1332 {
1333     QObject *ret = object_property_get_qobject(obj, name, errp);
1334     char *retval;
1335
1336     if (!ret) {
1337         return NULL;
1338     }
1339
1340     retval = g_strdup(qobject_get_try_str(ret));
1341     if (!retval) {
1342         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1343     }
1344
1345     qobject_unref(ret);
1346     return retval;
1347 }
1348
1349 void object_property_set_link(Object *obj, Object *value,
1350                               const char *name, Error **errp)
1351 {
1352     if (value) {
1353         char *path = object_get_canonical_path(value);
1354         object_property_set_str(obj, path, name, errp);
1355         g_free(path);
1356     } else {
1357         object_property_set_str(obj, "", name, errp);
1358     }
1359 }
1360
1361 Object *object_property_get_link(Object *obj, const char *name,
1362                                  Error **errp)
1363 {
1364     char *str = object_property_get_str(obj, name, errp);
1365     Object *target = NULL;
1366
1367     if (str && *str) {
1368         target = object_resolve_path(str, NULL);
1369         if (!target) {
1370             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1371                       "Device '%s' not found", str);
1372         }
1373     }
1374
1375     g_free(str);
1376     return target;
1377 }
1378
1379 void object_property_set_bool(Object *obj, bool value,
1380                               const char *name, Error **errp)
1381 {
1382     QBool *qbool = qbool_from_bool(value);
1383     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1384
1385     qobject_unref(qbool);
1386 }
1387
1388 bool object_property_get_bool(Object *obj, const char *name,
1389                               Error **errp)
1390 {
1391     QObject *ret = object_property_get_qobject(obj, name, errp);
1392     QBool *qbool;
1393     bool retval;
1394
1395     if (!ret) {
1396         return false;
1397     }
1398     qbool = qobject_to(QBool, ret);
1399     if (!qbool) {
1400         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1401         retval = false;
1402     } else {
1403         retval = qbool_get_bool(qbool);
1404     }
1405
1406     qobject_unref(ret);
1407     return retval;
1408 }
1409
1410 void object_property_set_int(Object *obj, int64_t value,
1411                              const char *name, Error **errp)
1412 {
1413     QNum *qnum = qnum_from_int(value);
1414     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1415
1416     qobject_unref(qnum);
1417 }
1418
1419 int64_t object_property_get_int(Object *obj, const char *name,
1420                                 Error **errp)
1421 {
1422     QObject *ret = object_property_get_qobject(obj, name, errp);
1423     QNum *qnum;
1424     int64_t retval;
1425
1426     if (!ret) {
1427         return -1;
1428     }
1429
1430     qnum = qobject_to(QNum, ret);
1431     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1432         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1433         retval = -1;
1434     }
1435
1436     qobject_unref(ret);
1437     return retval;
1438 }
1439
1440 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1441 {
1442     Visitor *v = qobject_input_visitor_new(prop->defval);
1443
1444     assert(prop->set != NULL);
1445     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1446
1447     visit_free(v);
1448 }
1449
1450 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1451 {
1452     assert(!prop->defval);
1453     assert(!prop->init);
1454
1455     prop->defval = defval;
1456     prop->init = object_property_init_defval;
1457 }
1458
1459 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1460 {
1461     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1462 }
1463
1464 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1465 {
1466     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1467 }
1468
1469 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1470 {
1471     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1472 }
1473
1474 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1475 {
1476     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1477 }
1478
1479 void object_property_set_uint(Object *obj, uint64_t value,
1480                               const char *name, Error **errp)
1481 {
1482     QNum *qnum = qnum_from_uint(value);
1483
1484     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1485     qobject_unref(qnum);
1486 }
1487
1488 uint64_t object_property_get_uint(Object *obj, const char *name,
1489                                   Error **errp)
1490 {
1491     QObject *ret = object_property_get_qobject(obj, name, errp);
1492     QNum *qnum;
1493     uint64_t retval;
1494
1495     if (!ret) {
1496         return 0;
1497     }
1498     qnum = qobject_to(QNum, ret);
1499     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1500         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1501         retval = 0;
1502     }
1503
1504     qobject_unref(ret);
1505     return retval;
1506 }
1507
1508 typedef struct EnumProperty {
1509     const QEnumLookup *lookup;
1510     int (*get)(Object *, Error **);
1511     void (*set)(Object *, int, Error **);
1512 } EnumProperty;
1513
1514 int object_property_get_enum(Object *obj, const char *name,
1515                              const char *typename, Error **errp)
1516 {
1517     char *str;
1518     int ret;
1519     ObjectProperty *prop = object_property_find(obj, name, errp);
1520     EnumProperty *enumprop;
1521
1522     if (prop == NULL) {
1523         return 0;
1524     }
1525
1526     if (!g_str_equal(prop->type, typename)) {
1527         error_setg(errp, "Property %s on %s is not '%s' enum type",
1528                    name, object_class_get_name(
1529                        object_get_class(obj)), typename);
1530         return 0;
1531     }
1532
1533     enumprop = prop->opaque;
1534
1535     str = object_property_get_str(obj, name, errp);
1536     if (!str) {
1537         return 0;
1538     }
1539
1540     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1541     g_free(str);
1542
1543     return ret;
1544 }
1545
1546 void object_property_parse(Object *obj, const char *string,
1547                            const char *name, Error **errp)
1548 {
1549     Visitor *v = string_input_visitor_new(string);
1550     object_property_set(obj, v, name, errp);
1551     visit_free(v);
1552 }
1553
1554 char *object_property_print(Object *obj, const char *name, bool human,
1555                             Error **errp)
1556 {
1557     Visitor *v;
1558     char *string = NULL;
1559     Error *local_err = NULL;
1560
1561     v = string_output_visitor_new(human, &string);
1562     object_property_get(obj, v, name, &local_err);
1563     if (local_err) {
1564         error_propagate(errp, local_err);
1565         goto out;
1566     }
1567
1568     visit_complete(v, &string);
1569
1570 out:
1571     visit_free(v);
1572     return string;
1573 }
1574
1575 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1576 {
1577     ObjectProperty *prop = object_property_find(obj, name, errp);
1578     if (prop == NULL) {
1579         return NULL;
1580     }
1581
1582     return prop->type;
1583 }
1584
1585 Object *object_get_root(void)
1586 {
1587     static Object *root;
1588
1589     if (!root) {
1590         root = object_new("container");
1591     }
1592
1593     return root;
1594 }
1595
1596 Object *object_get_objects_root(void)
1597 {
1598     return container_get(object_get_root(), "/objects");
1599 }
1600
1601 Object *object_get_internal_root(void)
1602 {
1603     static Object *internal_root;
1604
1605     if (!internal_root) {
1606         internal_root = object_new("container");
1607     }
1608
1609     return internal_root;
1610 }
1611
1612 static void object_get_child_property(Object *obj, Visitor *v,
1613                                       const char *name, void *opaque,
1614                                       Error **errp)
1615 {
1616     Object *child = opaque;
1617     char *path;
1618
1619     path = object_get_canonical_path(child);
1620     visit_type_str(v, name, &path, errp);
1621     g_free(path);
1622 }
1623
1624 static Object *object_resolve_child_property(Object *parent, void *opaque,
1625                                              const char *part)
1626 {
1627     return opaque;
1628 }
1629
1630 static void object_finalize_child_property(Object *obj, const char *name,
1631                                            void *opaque)
1632 {
1633     Object *child = opaque;
1634
1635     if (child->class->unparent) {
1636         (child->class->unparent)(child);
1637     }
1638     child->parent = NULL;
1639     object_unref(child);
1640 }
1641
1642 ObjectProperty *
1643 object_property_add_child(Object *obj, const char *name,
1644                           Object *child)
1645 {
1646     g_autofree char *type = NULL;
1647     ObjectProperty *op;
1648
1649     assert(!child->parent);
1650
1651     type = g_strdup_printf("child<%s>", object_get_typename(child));
1652
1653     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1654                              object_finalize_child_property, child);
1655     op->resolve = object_resolve_child_property;
1656     object_ref(child);
1657     child->parent = obj;
1658     return op;
1659 }
1660
1661 void object_property_allow_set_link(const Object *obj, const char *name,
1662                                     Object *val, Error **errp)
1663 {
1664     /* Allow the link to be set, always */
1665 }
1666
1667 typedef struct {
1668     union {
1669         Object **targetp;
1670         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1671         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1672     };
1673     void (*check)(const Object *, const char *, Object *, Error **);
1674     ObjectPropertyLinkFlags flags;
1675 } LinkProperty;
1676
1677 static Object **
1678 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1679 {
1680     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1681         return &lprop->target;
1682     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1683         return (void *)obj + lprop->offset;
1684     } else {
1685         return lprop->targetp;
1686     }
1687 }
1688
1689 static void object_get_link_property(Object *obj, Visitor *v,
1690                                      const char *name, void *opaque,
1691                                      Error **errp)
1692 {
1693     LinkProperty *lprop = opaque;
1694     Object **targetp = object_link_get_targetp(obj, lprop);
1695     char *path;
1696
1697     if (*targetp) {
1698         path = object_get_canonical_path(*targetp);
1699         visit_type_str(v, name, &path, errp);
1700         g_free(path);
1701     } else {
1702         path = (char *)"";
1703         visit_type_str(v, name, &path, errp);
1704     }
1705 }
1706
1707 /*
1708  * object_resolve_link:
1709  *
1710  * Lookup an object and ensure its type matches the link property type.  This
1711  * is similar to object_resolve_path() except type verification against the
1712  * link property is performed.
1713  *
1714  * Returns: The matched object or NULL on path lookup failures.
1715  */
1716 static Object *object_resolve_link(Object *obj, const char *name,
1717                                    const char *path, Error **errp)
1718 {
1719     const char *type;
1720     char *target_type;
1721     bool ambiguous = false;
1722     Object *target;
1723
1724     /* Go from link<FOO> to FOO.  */
1725     type = object_property_get_type(obj, name, NULL);
1726     target_type = g_strndup(&type[5], strlen(type) - 6);
1727     target = object_resolve_path_type(path, target_type, &ambiguous);
1728
1729     if (ambiguous) {
1730         error_setg(errp, "Path '%s' does not uniquely identify an object",
1731                    path);
1732     } else if (!target) {
1733         target = object_resolve_path(path, &ambiguous);
1734         if (target || ambiguous) {
1735             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1736         } else {
1737             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1738                       "Device '%s' not found", path);
1739         }
1740         target = NULL;
1741     }
1742     g_free(target_type);
1743
1744     return target;
1745 }
1746
1747 static void object_set_link_property(Object *obj, Visitor *v,
1748                                      const char *name, void *opaque,
1749                                      Error **errp)
1750 {
1751     Error *local_err = NULL;
1752     LinkProperty *prop = opaque;
1753     Object **targetp = object_link_get_targetp(obj, prop);
1754     Object *old_target = *targetp;
1755     Object *new_target = NULL;
1756     char *path = NULL;
1757
1758     visit_type_str(v, name, &path, &local_err);
1759
1760     if (!local_err && strcmp(path, "") != 0) {
1761         new_target = object_resolve_link(obj, name, path, &local_err);
1762     }
1763
1764     g_free(path);
1765     if (local_err) {
1766         error_propagate(errp, local_err);
1767         return;
1768     }
1769
1770     prop->check(obj, name, new_target, &local_err);
1771     if (local_err) {
1772         error_propagate(errp, local_err);
1773         return;
1774     }
1775
1776     *targetp = new_target;
1777     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1778         object_ref(new_target);
1779         object_unref(old_target);
1780     }
1781 }
1782
1783 static Object *object_resolve_link_property(Object *parent, void *opaque,
1784                                             const char *part)
1785 {
1786     LinkProperty *lprop = opaque;
1787
1788     return *object_link_get_targetp(parent, lprop);
1789 }
1790
1791 static void object_release_link_property(Object *obj, const char *name,
1792                                          void *opaque)
1793 {
1794     LinkProperty *prop = opaque;
1795     Object **targetp = object_link_get_targetp(obj, prop);
1796
1797     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1798         object_unref(*targetp);
1799     }
1800     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1801         g_free(prop);
1802     }
1803 }
1804
1805 static ObjectProperty *
1806 object_add_link_prop(Object *obj, const char *name,
1807                      const char *type, void *ptr,
1808                      void (*check)(const Object *, const char *,
1809                                    Object *, Error **),
1810                      ObjectPropertyLinkFlags flags)
1811 {
1812     LinkProperty *prop = g_malloc(sizeof(*prop));
1813     g_autofree char *full_type = NULL;
1814     ObjectProperty *op;
1815
1816     if (flags & OBJ_PROP_LINK_DIRECT) {
1817         prop->target = ptr;
1818     } else {
1819         prop->targetp = ptr;
1820     }
1821     prop->check = check;
1822     prop->flags = flags;
1823
1824     full_type = g_strdup_printf("link<%s>", type);
1825
1826     op = object_property_add(obj, name, full_type,
1827                              object_get_link_property,
1828                              check ? object_set_link_property : NULL,
1829                              object_release_link_property,
1830                              prop);
1831     op->resolve = object_resolve_link_property;
1832     return op;
1833 }
1834
1835 ObjectProperty *
1836 object_property_add_link(Object *obj, const char *name,
1837                          const char *type, Object **targetp,
1838                          void (*check)(const Object *, const char *,
1839                                        Object *, Error **),
1840                          ObjectPropertyLinkFlags flags)
1841 {
1842     return object_add_link_prop(obj, name, type, targetp, check, flags);
1843 }
1844
1845 ObjectProperty *
1846 object_class_property_add_link(ObjectClass *oc,
1847     const char *name,
1848     const char *type, ptrdiff_t offset,
1849     void (*check)(const Object *obj, const char *name,
1850                   Object *val, Error **errp),
1851     ObjectPropertyLinkFlags flags)
1852 {
1853     LinkProperty *prop = g_new0(LinkProperty, 1);
1854     char *full_type;
1855     ObjectProperty *op;
1856
1857     prop->offset = offset;
1858     prop->check = check;
1859     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1860
1861     full_type = g_strdup_printf("link<%s>", type);
1862
1863     op = object_class_property_add(oc, name, full_type,
1864                                    object_get_link_property,
1865                                    check ? object_set_link_property : NULL,
1866                                    object_release_link_property,
1867                                    prop);
1868
1869     op->resolve = object_resolve_link_property;
1870
1871     g_free(full_type);
1872     return op;
1873 }
1874
1875 ObjectProperty *
1876 object_property_add_const_link(Object *obj, const char *name,
1877                                Object *target)
1878 {
1879     return object_add_link_prop(obj, name,
1880                                 object_get_typename(target), target,
1881                                 NULL, OBJ_PROP_LINK_DIRECT);
1882 }
1883
1884 char *object_get_canonical_path_component(const Object *obj)
1885 {
1886     ObjectProperty *prop = NULL;
1887     GHashTableIter iter;
1888
1889     if (obj->parent == NULL) {
1890         return NULL;
1891     }
1892
1893     g_hash_table_iter_init(&iter, obj->parent->properties);
1894     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1895         if (!object_property_is_child(prop)) {
1896             continue;
1897         }
1898
1899         if (prop->opaque == obj) {
1900             return g_strdup(prop->name);
1901         }
1902     }
1903
1904     /* obj had a parent but was not a child, should never happen */
1905     g_assert_not_reached();
1906     return NULL;
1907 }
1908
1909 char *object_get_canonical_path(const Object *obj)
1910 {
1911     Object *root = object_get_root();
1912     char *newpath, *path = NULL;
1913
1914     if (obj == root) {
1915         return g_strdup("/");
1916     }
1917
1918     do {
1919         char *component = object_get_canonical_path_component(obj);
1920
1921         if (!component) {
1922             /* A canonical path must be complete, so discard what was
1923              * collected so far.
1924              */
1925             g_free(path);
1926             return NULL;
1927         }
1928
1929         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1930         g_free(path);
1931         g_free(component);
1932         path = newpath;
1933         obj = obj->parent;
1934     } while (obj != root);
1935
1936     return path;
1937 }
1938
1939 Object *object_resolve_path_component(Object *parent, const char *part)
1940 {
1941     ObjectProperty *prop = object_property_find(parent, part, NULL);
1942     if (prop == NULL) {
1943         return NULL;
1944     }
1945
1946     if (prop->resolve) {
1947         return prop->resolve(parent, prop->opaque, part);
1948     } else {
1949         return NULL;
1950     }
1951 }
1952
1953 static Object *object_resolve_abs_path(Object *parent,
1954                                           char **parts,
1955                                           const char *typename)
1956 {
1957     Object *child;
1958
1959     if (*parts == NULL) {
1960         return object_dynamic_cast(parent, typename);
1961     }
1962
1963     if (strcmp(*parts, "") == 0) {
1964         return object_resolve_abs_path(parent, parts + 1, typename);
1965     }
1966
1967     child = object_resolve_path_component(parent, *parts);
1968     if (!child) {
1969         return NULL;
1970     }
1971
1972     return object_resolve_abs_path(child, parts + 1, typename);
1973 }
1974
1975 static Object *object_resolve_partial_path(Object *parent,
1976                                            char **parts,
1977                                            const char *typename,
1978                                            bool *ambiguous)
1979 {
1980     Object *obj;
1981     GHashTableIter iter;
1982     ObjectProperty *prop;
1983
1984     obj = object_resolve_abs_path(parent, parts, typename);
1985
1986     g_hash_table_iter_init(&iter, parent->properties);
1987     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1988         Object *found;
1989
1990         if (!object_property_is_child(prop)) {
1991             continue;
1992         }
1993
1994         found = object_resolve_partial_path(prop->opaque, parts,
1995                                             typename, ambiguous);
1996         if (found) {
1997             if (obj) {
1998                 *ambiguous = true;
1999                 return NULL;
2000             }
2001             obj = found;
2002         }
2003
2004         if (*ambiguous) {
2005             return NULL;
2006         }
2007     }
2008
2009     return obj;
2010 }
2011
2012 Object *object_resolve_path_type(const char *path, const char *typename,
2013                                  bool *ambiguousp)
2014 {
2015     Object *obj;
2016     char **parts;
2017
2018     parts = g_strsplit(path, "/", 0);
2019     assert(parts);
2020
2021     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2022         bool ambiguous = false;
2023         obj = object_resolve_partial_path(object_get_root(), parts,
2024                                           typename, &ambiguous);
2025         if (ambiguousp) {
2026             *ambiguousp = ambiguous;
2027         }
2028     } else {
2029         obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2030     }
2031
2032     g_strfreev(parts);
2033
2034     return obj;
2035 }
2036
2037 Object *object_resolve_path(const char *path, bool *ambiguous)
2038 {
2039     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2040 }
2041
2042 typedef struct StringProperty
2043 {
2044     char *(*get)(Object *, Error **);
2045     void (*set)(Object *, const char *, Error **);
2046 } StringProperty;
2047
2048 static void property_get_str(Object *obj, Visitor *v, const char *name,
2049                              void *opaque, Error **errp)
2050 {
2051     StringProperty *prop = opaque;
2052     char *value;
2053     Error *err = NULL;
2054
2055     value = prop->get(obj, &err);
2056     if (err) {
2057         error_propagate(errp, err);
2058         return;
2059     }
2060
2061     visit_type_str(v, name, &value, errp);
2062     g_free(value);
2063 }
2064
2065 static void property_set_str(Object *obj, Visitor *v, const char *name,
2066                              void *opaque, Error **errp)
2067 {
2068     StringProperty *prop = opaque;
2069     char *value;
2070     Error *local_err = NULL;
2071
2072     visit_type_str(v, name, &value, &local_err);
2073     if (local_err) {
2074         error_propagate(errp, local_err);
2075         return;
2076     }
2077
2078     prop->set(obj, value, errp);
2079     g_free(value);
2080 }
2081
2082 static void property_release_str(Object *obj, const char *name,
2083                                  void *opaque)
2084 {
2085     StringProperty *prop = opaque;
2086     g_free(prop);
2087 }
2088
2089 ObjectProperty *
2090 object_property_add_str(Object *obj, const char *name,
2091                         char *(*get)(Object *, Error **),
2092                         void (*set)(Object *, const char *, Error **))
2093 {
2094     StringProperty *prop = g_malloc0(sizeof(*prop));
2095
2096     prop->get = get;
2097     prop->set = set;
2098
2099     return object_property_add(obj, name, "string",
2100                                get ? property_get_str : NULL,
2101                                set ? property_set_str : NULL,
2102                                property_release_str,
2103                                prop);
2104 }
2105
2106 ObjectProperty *
2107 object_class_property_add_str(ObjectClass *klass, const char *name,
2108                                    char *(*get)(Object *, Error **),
2109                                    void (*set)(Object *, const char *,
2110                                                Error **))
2111 {
2112     StringProperty *prop = g_malloc0(sizeof(*prop));
2113
2114     prop->get = get;
2115     prop->set = set;
2116
2117     return object_class_property_add(klass, name, "string",
2118                                      get ? property_get_str : NULL,
2119                                      set ? property_set_str : NULL,
2120                                      NULL,
2121                                      prop);
2122 }
2123
2124 typedef struct BoolProperty
2125 {
2126     bool (*get)(Object *, Error **);
2127     void (*set)(Object *, bool, Error **);
2128 } BoolProperty;
2129
2130 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2131                               void *opaque, Error **errp)
2132 {
2133     BoolProperty *prop = opaque;
2134     bool value;
2135     Error *err = NULL;
2136
2137     value = prop->get(obj, &err);
2138     if (err) {
2139         error_propagate(errp, err);
2140         return;
2141     }
2142
2143     visit_type_bool(v, name, &value, errp);
2144 }
2145
2146 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2147                               void *opaque, Error **errp)
2148 {
2149     BoolProperty *prop = opaque;
2150     bool value;
2151     Error *local_err = NULL;
2152
2153     visit_type_bool(v, name, &value, &local_err);
2154     if (local_err) {
2155         error_propagate(errp, local_err);
2156         return;
2157     }
2158
2159     prop->set(obj, value, errp);
2160 }
2161
2162 static void property_release_bool(Object *obj, const char *name,
2163                                   void *opaque)
2164 {
2165     BoolProperty *prop = opaque;
2166     g_free(prop);
2167 }
2168
2169 ObjectProperty *
2170 object_property_add_bool(Object *obj, const char *name,
2171                          bool (*get)(Object *, Error **),
2172                          void (*set)(Object *, bool, Error **))
2173 {
2174     BoolProperty *prop = g_malloc0(sizeof(*prop));
2175
2176     prop->get = get;
2177     prop->set = set;
2178
2179     return object_property_add(obj, name, "bool",
2180                                get ? property_get_bool : NULL,
2181                                set ? property_set_bool : NULL,
2182                                property_release_bool,
2183                                prop);
2184 }
2185
2186 ObjectProperty *
2187 object_class_property_add_bool(ObjectClass *klass, const char *name,
2188                                     bool (*get)(Object *, Error **),
2189                                     void (*set)(Object *, bool, Error **))
2190 {
2191     BoolProperty *prop = g_malloc0(sizeof(*prop));
2192
2193     prop->get = get;
2194     prop->set = set;
2195
2196     return object_class_property_add(klass, name, "bool",
2197                                      get ? property_get_bool : NULL,
2198                                      set ? property_set_bool : NULL,
2199                                      NULL,
2200                                      prop);
2201 }
2202
2203 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2204                               void *opaque, Error **errp)
2205 {
2206     EnumProperty *prop = opaque;
2207     int value;
2208     Error *err = NULL;
2209
2210     value = prop->get(obj, &err);
2211     if (err) {
2212         error_propagate(errp, err);
2213         return;
2214     }
2215
2216     visit_type_enum(v, name, &value, prop->lookup, errp);
2217 }
2218
2219 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2220                               void *opaque, Error **errp)
2221 {
2222     EnumProperty *prop = opaque;
2223     int value;
2224     Error *err = NULL;
2225
2226     visit_type_enum(v, name, &value, prop->lookup, &err);
2227     if (err) {
2228         error_propagate(errp, err);
2229         return;
2230     }
2231     prop->set(obj, value, errp);
2232 }
2233
2234 static void property_release_enum(Object *obj, const char *name,
2235                                   void *opaque)
2236 {
2237     EnumProperty *prop = opaque;
2238     g_free(prop);
2239 }
2240
2241 ObjectProperty *
2242 object_property_add_enum(Object *obj, const char *name,
2243                          const char *typename,
2244                          const QEnumLookup *lookup,
2245                          int (*get)(Object *, Error **),
2246                          void (*set)(Object *, int, Error **))
2247 {
2248     EnumProperty *prop = g_malloc(sizeof(*prop));
2249
2250     prop->lookup = lookup;
2251     prop->get = get;
2252     prop->set = set;
2253
2254     return object_property_add(obj, name, typename,
2255                                get ? property_get_enum : NULL,
2256                                set ? property_set_enum : NULL,
2257                                property_release_enum,
2258                                prop);
2259 }
2260
2261 ObjectProperty *
2262 object_class_property_add_enum(ObjectClass *klass, const char *name,
2263                                     const char *typename,
2264                                     const QEnumLookup *lookup,
2265                                     int (*get)(Object *, Error **),
2266                                     void (*set)(Object *, int, Error **))
2267 {
2268     EnumProperty *prop = g_malloc(sizeof(*prop));
2269
2270     prop->lookup = lookup;
2271     prop->get = get;
2272     prop->set = set;
2273
2274     return object_class_property_add(klass, name, typename,
2275                                      get ? property_get_enum : NULL,
2276                                      set ? property_set_enum : NULL,
2277                                      NULL,
2278                                      prop);
2279 }
2280
2281 typedef struct TMProperty {
2282     void (*get)(Object *, struct tm *, Error **);
2283 } TMProperty;
2284
2285 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2286                             void *opaque, Error **errp)
2287 {
2288     TMProperty *prop = opaque;
2289     Error *err = NULL;
2290     struct tm value;
2291
2292     prop->get(obj, &value, &err);
2293     if (err) {
2294         goto out;
2295     }
2296
2297     visit_start_struct(v, name, NULL, 0, &err);
2298     if (err) {
2299         goto out;
2300     }
2301     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2302     if (err) {
2303         goto out_end;
2304     }
2305     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2306     if (err) {
2307         goto out_end;
2308     }
2309     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2310     if (err) {
2311         goto out_end;
2312     }
2313     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2314     if (err) {
2315         goto out_end;
2316     }
2317     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2318     if (err) {
2319         goto out_end;
2320     }
2321     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2322     if (err) {
2323         goto out_end;
2324     }
2325     visit_check_struct(v, &err);
2326 out_end:
2327     visit_end_struct(v, NULL);
2328 out:
2329     error_propagate(errp, err);
2330
2331 }
2332
2333 static void property_release_tm(Object *obj, const char *name,
2334                                 void *opaque)
2335 {
2336     TMProperty *prop = opaque;
2337     g_free(prop);
2338 }
2339
2340 ObjectProperty *
2341 object_property_add_tm(Object *obj, const char *name,
2342                        void (*get)(Object *, struct tm *, Error **))
2343 {
2344     TMProperty *prop = g_malloc0(sizeof(*prop));
2345
2346     prop->get = get;
2347
2348     return object_property_add(obj, name, "struct tm",
2349                                get ? property_get_tm : NULL, NULL,
2350                                property_release_tm,
2351                                prop);
2352 }
2353
2354 ObjectProperty *
2355 object_class_property_add_tm(ObjectClass *klass, const char *name,
2356                              void (*get)(Object *, struct tm *, Error **))
2357 {
2358     TMProperty *prop = g_malloc0(sizeof(*prop));
2359
2360     prop->get = get;
2361
2362     return object_class_property_add(klass, name, "struct tm",
2363                                      get ? property_get_tm : NULL,
2364                                      NULL, NULL, prop);
2365 }
2366
2367 static char *qdev_get_type(Object *obj, Error **errp)
2368 {
2369     return g_strdup(object_get_typename(obj));
2370 }
2371
2372 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2373                                    void *opaque, Error **errp)
2374 {
2375     uint8_t value = *(uint8_t *)opaque;
2376     visit_type_uint8(v, name, &value, errp);
2377 }
2378
2379 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2380                                    void *opaque, Error **errp)
2381 {
2382     uint8_t *field = opaque;
2383     uint8_t value;
2384     Error *local_err = NULL;
2385
2386     visit_type_uint8(v, name, &value, &local_err);
2387     if (local_err) {
2388         error_propagate(errp, local_err);
2389         return;
2390     }
2391
2392     *field = value;
2393 }
2394
2395 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2396                                     void *opaque, Error **errp)
2397 {
2398     uint16_t value = *(uint16_t *)opaque;
2399     visit_type_uint16(v, name, &value, errp);
2400 }
2401
2402 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2403                                     void *opaque, Error **errp)
2404 {
2405     uint16_t *field = opaque;
2406     uint16_t value;
2407     Error *local_err = NULL;
2408
2409     visit_type_uint16(v, name, &value, &local_err);
2410     if (local_err) {
2411         error_propagate(errp, local_err);
2412         return;
2413     }
2414
2415     *field = value;
2416 }
2417
2418 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2419                                     void *opaque, Error **errp)
2420 {
2421     uint32_t value = *(uint32_t *)opaque;
2422     visit_type_uint32(v, name, &value, errp);
2423 }
2424
2425 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2426                                     void *opaque, Error **errp)
2427 {
2428     uint32_t *field = opaque;
2429     uint32_t value;
2430     Error *local_err = NULL;
2431
2432     visit_type_uint32(v, name, &value, &local_err);
2433     if (local_err) {
2434         error_propagate(errp, local_err);
2435         return;
2436     }
2437
2438     *field = value;
2439 }
2440
2441 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2442                                     void *opaque, Error **errp)
2443 {
2444     uint64_t value = *(uint64_t *)opaque;
2445     visit_type_uint64(v, name, &value, errp);
2446 }
2447
2448 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2449                                     void *opaque, Error **errp)
2450 {
2451     uint64_t *field = opaque;
2452     uint64_t value;
2453     Error *local_err = NULL;
2454
2455     visit_type_uint64(v, name, &value, &local_err);
2456     if (local_err) {
2457         error_propagate(errp, local_err);
2458         return;
2459     }
2460
2461     *field = value;
2462 }
2463
2464 ObjectProperty *
2465 object_property_add_uint8_ptr(Object *obj, const char *name,
2466                               const uint8_t *v,
2467                               ObjectPropertyFlags flags)
2468 {
2469     ObjectPropertyAccessor *getter = NULL;
2470     ObjectPropertyAccessor *setter = NULL;
2471
2472     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2473         getter = property_get_uint8_ptr;
2474     }
2475
2476     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2477         setter = property_set_uint8_ptr;
2478     }
2479
2480     return object_property_add(obj, name, "uint8",
2481                                getter, setter, NULL, (void *)v);
2482 }
2483
2484 ObjectProperty *
2485 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2486                                     const uint8_t *v,
2487                                     ObjectPropertyFlags flags)
2488 {
2489     ObjectPropertyAccessor *getter = NULL;
2490     ObjectPropertyAccessor *setter = NULL;
2491
2492     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2493         getter = property_get_uint8_ptr;
2494     }
2495
2496     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2497         setter = property_set_uint8_ptr;
2498     }
2499
2500     return object_class_property_add(klass, name, "uint8",
2501                                      getter, setter, NULL, (void *)v);
2502 }
2503
2504 ObjectProperty *
2505 object_property_add_uint16_ptr(Object *obj, const char *name,
2506                                const uint16_t *v,
2507                                ObjectPropertyFlags flags)
2508 {
2509     ObjectPropertyAccessor *getter = NULL;
2510     ObjectPropertyAccessor *setter = NULL;
2511
2512     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2513         getter = property_get_uint16_ptr;
2514     }
2515
2516     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2517         setter = property_set_uint16_ptr;
2518     }
2519
2520     return object_property_add(obj, name, "uint16",
2521                                getter, setter, NULL, (void *)v);
2522 }
2523
2524 ObjectProperty *
2525 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2526                                      const uint16_t *v,
2527                                      ObjectPropertyFlags flags)
2528 {
2529     ObjectPropertyAccessor *getter = NULL;
2530     ObjectPropertyAccessor *setter = NULL;
2531
2532     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2533         getter = property_get_uint16_ptr;
2534     }
2535
2536     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2537         setter = property_set_uint16_ptr;
2538     }
2539
2540     return object_class_property_add(klass, name, "uint16",
2541                                      getter, setter, NULL, (void *)v);
2542 }
2543
2544 ObjectProperty *
2545 object_property_add_uint32_ptr(Object *obj, const char *name,
2546                                const uint32_t *v,
2547                                ObjectPropertyFlags flags)
2548 {
2549     ObjectPropertyAccessor *getter = NULL;
2550     ObjectPropertyAccessor *setter = NULL;
2551
2552     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2553         getter = property_get_uint32_ptr;
2554     }
2555
2556     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2557         setter = property_set_uint32_ptr;
2558     }
2559
2560     return object_property_add(obj, name, "uint32",
2561                                getter, setter, NULL, (void *)v);
2562 }
2563
2564 ObjectProperty *
2565 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2566                                      const uint32_t *v,
2567                                      ObjectPropertyFlags flags)
2568 {
2569     ObjectPropertyAccessor *getter = NULL;
2570     ObjectPropertyAccessor *setter = NULL;
2571
2572     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2573         getter = property_get_uint32_ptr;
2574     }
2575
2576     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2577         setter = property_set_uint32_ptr;
2578     }
2579
2580     return object_class_property_add(klass, name, "uint32",
2581                                      getter, setter, NULL, (void *)v);
2582 }
2583
2584 ObjectProperty *
2585 object_property_add_uint64_ptr(Object *obj, const char *name,
2586                                const uint64_t *v,
2587                                ObjectPropertyFlags flags)
2588 {
2589     ObjectPropertyAccessor *getter = NULL;
2590     ObjectPropertyAccessor *setter = NULL;
2591
2592     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2593         getter = property_get_uint64_ptr;
2594     }
2595
2596     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2597         setter = property_set_uint64_ptr;
2598     }
2599
2600     return object_property_add(obj, name, "uint64",
2601                                getter, setter, NULL, (void *)v);
2602 }
2603
2604 ObjectProperty *
2605 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2606                                      const uint64_t *v,
2607                                      ObjectPropertyFlags flags)
2608 {
2609     ObjectPropertyAccessor *getter = NULL;
2610     ObjectPropertyAccessor *setter = NULL;
2611
2612     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2613         getter = property_get_uint64_ptr;
2614     }
2615
2616     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2617         setter = property_set_uint64_ptr;
2618     }
2619
2620     return object_class_property_add(klass, name, "uint64",
2621                                      getter, setter, NULL, (void *)v);
2622 }
2623
2624 typedef struct {
2625     Object *target_obj;
2626     char *target_name;
2627 } AliasProperty;
2628
2629 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2630                                void *opaque, Error **errp)
2631 {
2632     AliasProperty *prop = opaque;
2633
2634     object_property_get(prop->target_obj, v, prop->target_name, errp);
2635 }
2636
2637 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2638                                void *opaque, Error **errp)
2639 {
2640     AliasProperty *prop = opaque;
2641
2642     object_property_set(prop->target_obj, v, prop->target_name, errp);
2643 }
2644
2645 static Object *property_resolve_alias(Object *obj, void *opaque,
2646                                       const char *part)
2647 {
2648     AliasProperty *prop = opaque;
2649
2650     return object_resolve_path_component(prop->target_obj, prop->target_name);
2651 }
2652
2653 static void property_release_alias(Object *obj, const char *name, void *opaque)
2654 {
2655     AliasProperty *prop = opaque;
2656
2657     g_free(prop->target_name);
2658     g_free(prop);
2659 }
2660
2661 ObjectProperty *
2662 object_property_add_alias(Object *obj, const char *name,
2663                           Object *target_obj, const char *target_name)
2664 {
2665     AliasProperty *prop;
2666     ObjectProperty *op;
2667     ObjectProperty *target_prop;
2668     g_autofree char *prop_type = NULL;
2669
2670     target_prop = object_property_find(target_obj, target_name,
2671                                        &error_abort);
2672
2673     if (object_property_is_child(target_prop)) {
2674         prop_type = g_strdup_printf("link%s",
2675                                     target_prop->type + strlen("child"));
2676     } else {
2677         prop_type = g_strdup(target_prop->type);
2678     }
2679
2680     prop = g_malloc(sizeof(*prop));
2681     prop->target_obj = target_obj;
2682     prop->target_name = g_strdup(target_name);
2683
2684     op = object_property_add(obj, name, prop_type,
2685                              property_get_alias,
2686                              property_set_alias,
2687                              property_release_alias,
2688                              prop);
2689     op->resolve = property_resolve_alias;
2690     if (target_prop->defval) {
2691         op->defval = qobject_ref(target_prop->defval);
2692     }
2693
2694     object_property_set_description(obj, op->name,
2695                                     target_prop->description);
2696     return op;
2697 }
2698
2699 void object_property_set_description(Object *obj, const char *name,
2700                                      const char *description)
2701 {
2702     ObjectProperty *op;
2703
2704     op = object_property_find(obj, name, &error_abort);
2705     g_free(op->description);
2706     op->description = g_strdup(description);
2707 }
2708
2709 void object_class_property_set_description(ObjectClass *klass,
2710                                            const char *name,
2711                                            const char *description)
2712 {
2713     ObjectProperty *op;
2714
2715     op = g_hash_table_lookup(klass->properties, name);
2716     g_free(op->description);
2717     op->description = g_strdup(description);
2718 }
2719
2720 static void object_class_init(ObjectClass *klass, void *data)
2721 {
2722     object_class_property_add_str(klass, "type", qdev_get_type,
2723                                   NULL);
2724 }
2725
2726 static void register_types(void)
2727 {
2728     static TypeInfo interface_info = {
2729         .name = TYPE_INTERFACE,
2730         .class_size = sizeof(InterfaceClass),
2731         .abstract = true,
2732     };
2733
2734     static TypeInfo object_info = {
2735         .name = TYPE_OBJECT,
2736         .instance_size = sizeof(Object),
2737         .class_init = object_class_init,
2738         .abstract = true,
2739     };
2740
2741     type_interface = type_register_internal(&interface_info);
2742     type_register_internal(&object_info);
2743 }
2744
2745 type_init(register_types)