qom/object.c

   1 /*
   2  * QEMU Object Model
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <[email protected]>
   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 bool object_apply_global_props(Object *obj, const GPtrArray *props,
 389                                Error **errp)
 390 {
 391     int i;
 392
 393     if (!props) {
 394         return true;
 395     }
 396
 397     for (i = 0; i < props->len; i++) {
 398         GlobalProperty *p = g_ptr_array_index(props, i);
 399         Error *err = NULL;
 400
 401         if (object_dynamic_cast(obj, p->driver) == NULL) {
 402             continue;
 403         }
 404         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 405             continue;
 406         }
 407         p->used = true;
 408         if (!object_property_parse(obj, p->property, p->value, &err)) {
 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 false;
 419             } else {
 420                 warn_report_err(err);
 421             }
 422         }
 423     }
 424
 425     return true;
 426 }
 427
 428 /*
 429  * Global property defaults
 430  * Slot 0: accelerator's global property defaults
 431  * Slot 1: machine's global property defaults
 432  * Slot 2: global properties from legacy command line option
 433  * Each is a GPtrArray of of GlobalProperty.
 434  * Applied in order, later entries override earlier ones.
 435  */
 436 static GPtrArray *object_compat_props[3];
 437
 438 /*
 439  * Retrieve @GPtrArray for global property defined with options
 440  * other than "-global".  These are generally used for syntactic
 441  * sugar and legacy command line options.
 442  */
 443 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 444 {
 445     GlobalProperty *g;
 446     if (!object_compat_props[2]) {
 447         object_compat_props[2] = g_ptr_array_new();
 448     }
 449     g = g_new0(GlobalProperty, 1);
 450     g->driver = g_strdup(driver);
 451     g->property = g_strdup(prop);
 452     g->value = g_strdup(value);
 453     g_ptr_array_add(object_compat_props[2], g);
 454 }
 455
 456 /*
 457  * Set machine's global property defaults to @compat_props.
 458  * May be called at most once.
 459  */
 460 void object_set_machine_compat_props(GPtrArray *compat_props)
 461 {
 462     assert(!object_compat_props[1]);
 463     object_compat_props[1] = compat_props;
 464 }
 465
 466 /*
 467  * Set accelerator's global property defaults to @compat_props.
 468  * May be called at most once.
 469  */
 470 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 471 {
 472     assert(!object_compat_props[0]);
 473     object_compat_props[0] = compat_props;
 474 }
 475
 476 void object_apply_compat_props(Object *obj)
 477 {
 478     int i;
 479
 480     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 481         object_apply_global_props(obj, object_compat_props[i],
 482                                   i == 2 ? &error_fatal : &error_abort);
 483     }
 484 }
 485
 486 static void object_class_property_init_all(Object *obj)
 487 {
 488     ObjectPropertyIterator iter;
 489     ObjectProperty *prop;
 490
 491     object_class_property_iter_init(&iter, object_get_class(obj));
 492     while ((prop = object_property_iter_next(&iter))) {
 493         if (prop->init) {
 494             prop->init(obj, prop);
 495         }
 496     }
 497 }
 498
 499 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
 500 {
 501     type_initialize(type);
 502
 503     g_assert(type->instance_size >= sizeof(Object));
 504     g_assert(type->abstract == false);
 505     g_assert(size >= type->instance_size);
 506
 507     memset(obj, 0, type->instance_size);
 508     obj->class = type->class;
 509     object_ref(obj);
 510     object_class_property_init_all(obj);
 511     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 512                                             NULL, object_property_free);
 513     object_init_with_type(obj, type);
 514     object_post_init_with_type(obj, type);
 515 }
 516
 517 void object_initialize(void *data, size_t size, const char *typename)
 518 {
 519     TypeImpl *type = type_get_by_name(typename);
 520
 521     if (!type) {
 522         error_report("missing object type '%s'", typename);
 523         abort();
 524     }
 525
 526     object_initialize_with_type(data, size, type);
 527 }
 528
 529 bool object_initialize_child_with_props(Object *parentobj,
 530                                         const char *propname,
 531                                         void *childobj, size_t size,
 532                                         const char *type,
 533                                         Error **errp, ...)
 534 {
 535     va_list vargs;
 536     bool ok;
 537
 538     va_start(vargs, errp);
 539     ok = object_initialize_child_with_propsv(parentobj, propname,
 540                                              childobj, size, type, errp,
 541                                              vargs);
 542     va_end(vargs);
 543     return ok;
 544 }
 545
 546 bool object_initialize_child_with_propsv(Object *parentobj,
 547                                          const char *propname,
 548                                          void *childobj, size_t size,
 549                                          const char *type,
 550                                          Error **errp, va_list vargs)
 551 {
 552     bool ok = false;
 553     Object *obj;
 554     UserCreatable *uc;
 555
 556     object_initialize(childobj, size, type);
 557     obj = OBJECT(childobj);
 558
 559     if (!object_set_propv(obj, errp, vargs)) {
 560         goto out;
 561     }
 562
 563     object_property_add_child(parentobj, propname, obj);
 564
 565     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 566     if (uc) {
 567         if (!user_creatable_complete(uc, errp)) {
 568             object_unparent(obj);
 569             goto out;
 570         }
 571     }
 572
 573     ok = true;
 574
 575 out:
 576     /*
 577      * We want @obj's reference to be 1 on success, 0 on failure.
 578      * On success, it's 2: one taken by object_initialize(), and one
 579      * by object_property_add_child().
 580      * On failure in object_initialize() or earlier, it's 1.
 581      * On failure afterwards, it's also 1: object_unparent() releases
 582      * the reference taken by object_property_add_child().
 583      */
 584     object_unref(obj);
 585     return ok;
 586 }
 587
 588 void object_initialize_child_internal(Object *parent,
 589                                       const char *propname,
 590                                       void *child, size_t size,
 591                                       const char *type)
 592 {
 593     object_initialize_child_with_props(parent, propname, child, size, type,
 594                                        &error_abort, NULL);
 595 }
 596
 597 static inline bool object_property_is_child(ObjectProperty *prop)
 598 {
 599     return strstart(prop->type, "child<", NULL);
 600 }
 601
 602 static void object_property_del_all(Object *obj)
 603 {
 604     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 605     ObjectProperty *prop;
 606     ObjectPropertyIterator iter;
 607     bool released;
 608
 609     do {
 610         released = false;
 611         object_property_iter_init(&iter, obj);
 612         while ((prop = object_property_iter_next(&iter)) != NULL) {
 613             if (g_hash_table_add(done, prop)) {
 614                 if (prop->release) {
 615                     prop->release(obj, prop->name, prop->opaque);
 616                     released = true;
 617                     break;
 618                 }
 619             }
 620         }
 621     } while (released);
 622
 623     g_hash_table_unref(obj->properties);
 624 }
 625
 626 static void object_property_del_child(Object *obj, Object *child)
 627 {
 628     ObjectProperty *prop;
 629     GHashTableIter iter;
 630     gpointer key, value;
 631
 632     g_hash_table_iter_init(&iter, obj->properties);
 633     while (g_hash_table_iter_next(&iter, &key, &value)) {
 634         prop = value;
 635         if (object_property_is_child(prop) && prop->opaque == child) {
 636             if (prop->release) {
 637                 prop->release(obj, prop->name, prop->opaque);
 638                 prop->release = NULL;
 639             }
 640             break;
 641         }
 642     }
 643     g_hash_table_iter_init(&iter, obj->properties);
 644     while (g_hash_table_iter_next(&iter, &key, &value)) {
 645         prop = value;
 646         if (object_property_is_child(prop) && prop->opaque == child) {
 647             g_hash_table_iter_remove(&iter);
 648             break;
 649         }
 650     }
 651 }
 652
 653 void object_unparent(Object *obj)
 654 {
 655     if (obj->parent) {
 656         object_property_del_child(obj->parent, obj);
 657     }
 658 }
 659
 660 static void object_deinit(Object *obj, TypeImpl *type)
 661 {
 662     if (type->instance_finalize) {
 663         type->instance_finalize(obj);
 664     }
 665
 666     if (type_has_parent(type)) {
 667         object_deinit(obj, type_get_parent(type));
 668     }
 669 }
 670
 671 static void object_finalize(void *data)
 672 {
 673     Object *obj = data;
 674     TypeImpl *ti = obj->class->type;
 675
 676     object_property_del_all(obj);
 677     object_deinit(obj, ti);
 678
 679     g_assert(obj->ref == 0);
 680     if (obj->free) {
 681         obj->free(obj);
 682     }
 683 }
 684
 685 static Object *object_new_with_type(Type type)
 686 {
 687     Object *obj;
 688
 689     g_assert(type != NULL);
 690     type_initialize(type);
 691
 692     obj = g_malloc(type->instance_size);
 693     object_initialize_with_type(obj, type->instance_size, type);
 694     obj->free = g_free;
 695
 696     return obj;
 697 }
 698
 699 Object *object_new_with_class(ObjectClass *klass)
 700 {
 701     return object_new_with_type(klass->type);
 702 }
 703
 704 Object *object_new(const char *typename)
 705 {
 706     TypeImpl *ti = type_get_by_name(typename);
 707
 708     return object_new_with_type(ti);
 709 }
 710
 711
 712 Object *object_new_with_props(const char *typename,
 713                               Object *parent,
 714                               const char *id,
 715                               Error **errp,
 716                               ...)
 717 {
 718     va_list vargs;
 719     Object *obj;
 720
 721     va_start(vargs, errp);
 722     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 723     va_end(vargs);
 724
 725     return obj;
 726 }
 727
 728
 729 Object *object_new_with_propv(const char *typename,
 730                               Object *parent,
 731                               const char *id,
 732                               Error **errp,
 733                               va_list vargs)
 734 {
 735     Object *obj;
 736     ObjectClass *klass;
 737     UserCreatable *uc;
 738
 739     klass = object_class_by_name(typename);
 740     if (!klass) {
 741         error_setg(errp, "invalid object type: %s", typename);
 742         return NULL;
 743     }
 744
 745     if (object_class_is_abstract(klass)) {
 746         error_setg(errp, "object type '%s' is abstract", typename);
 747         return NULL;
 748     }
 749     obj = object_new_with_type(klass->type);
 750
 751     if (!object_set_propv(obj, errp, vargs)) {
 752         goto error;
 753     }
 754
 755     if (id != NULL) {
 756         object_property_add_child(parent, id, obj);
 757     }
 758
 759     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 760     if (uc) {
 761         if (!user_creatable_complete(uc, errp)) {
 762             if (id != NULL) {
 763                 object_unparent(obj);
 764             }
 765             goto error;
 766         }
 767     }
 768
 769     object_unref(obj);
 770     return obj;
 771
 772  error:
 773     object_unref(obj);
 774     return NULL;
 775 }
 776
 777
 778 bool object_set_props(Object *obj,
 779                      Error **errp,
 780                      ...)
 781 {
 782     va_list vargs;
 783     bool ret;
 784
 785     va_start(vargs, errp);
 786     ret = object_set_propv(obj, errp, vargs);
 787     va_end(vargs);
 788
 789     return ret;
 790 }
 791
 792
 793 bool object_set_propv(Object *obj,
 794                      Error **errp,
 795                      va_list vargs)
 796 {
 797     const char *propname;
 798
 799     propname = va_arg(vargs, char *);
 800     while (propname != NULL) {
 801         const char *value = va_arg(vargs, char *);
 802
 803         g_assert(value != NULL);
 804         if (!object_property_parse(obj, propname, value, errp)) {
 805             return false;
 806         }
 807         propname = va_arg(vargs, char *);
 808     }
 809
 810     return true;
 811 }
 812
 813
 814 Object *object_dynamic_cast(Object *obj, const char *typename)
 815 {
 816     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 817         return obj;
 818     }
 819
 820     return NULL;
 821 }
 822
 823 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 824                                    const char *file, int line, const char *func)
 825 {
 826     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 827                                      typename, file, line, func);
 828
 829 #ifdef CONFIG_QOM_CAST_DEBUG
 830     int i;
 831     Object *inst;
 832
 833     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 834         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 835             goto out;
 836         }
 837     }
 838
 839     inst = object_dynamic_cast(obj, typename);
 840
 841     if (!inst && obj) {
 842         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 843                 file, line, func, obj, typename);
 844         abort();
 845     }
 846
 847     assert(obj == inst);
 848
 849     if (obj && obj == inst) {
 850         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 851             atomic_set(&obj->class->object_cast_cache[i - 1],
 852                        atomic_read(&obj->class->object_cast_cache[i]));
 853         }
 854         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 855     }
 856
 857 out:
 858 #endif
 859     return obj;
 860 }
 861
 862 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 863                                        const char *typename)
 864 {
 865     ObjectClass *ret = NULL;
 866     TypeImpl *target_type;
 867     TypeImpl *type;
 868
 869     if (!class) {
 870         return NULL;
 871     }
 872
 873     /* A simple fast path that can trigger a lot for leaf classes.  */
 874     type = class->type;
 875     if (type->name == typename) {
 876         return class;
 877     }
 878
 879     target_type = type_get_by_name(typename);
 880     if (!target_type) {
 881         /* target class type unknown, so fail the cast */
 882         return NULL;
 883     }
 884
 885     if (type->class->interfaces &&
 886             type_is_ancestor(target_type, type_interface)) {
 887         int found = 0;
 888         GSList *i;
 889
 890         for (i = class->interfaces; i; i = i->next) {
 891             ObjectClass *target_class = i->data;
 892
 893             if (type_is_ancestor(target_class->type, target_type)) {
 894                 ret = target_class;
 895                 found++;
 896             }
 897          }
 898
 899         /* The match was ambiguous, don't allow a cast */
 900         if (found > 1) {
 901             ret = NULL;
 902         }
 903     } else if (type_is_ancestor(type, target_type)) {
 904         ret = class;
 905     }
 906
 907     return ret;
 908 }
 909
 910 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 911                                               const char *typename,
 912                                               const char *file, int line,
 913                                               const char *func)
 914 {
 915     ObjectClass *ret;
 916
 917     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 918                                            typename, file, line, func);
 919
 920 #ifdef CONFIG_QOM_CAST_DEBUG
 921     int i;
 922
 923     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 924         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 925             ret = class;
 926             goto out;
 927         }
 928     }
 929 #else
 930     if (!class || !class->interfaces) {
 931         return class;
 932     }
 933 #endif
 934
 935     ret = object_class_dynamic_cast(class, typename);
 936     if (!ret && class) {
 937         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 938                 file, line, func, class, typename);
 939         abort();
 940     }
 941
 942 #ifdef CONFIG_QOM_CAST_DEBUG
 943     if (class && ret == class) {
 944         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 945             atomic_set(&class->class_cast_cache[i - 1],
 946                        atomic_read(&class->class_cast_cache[i]));
 947         }
 948         atomic_set(&class->class_cast_cache[i - 1], typename);
 949     }
 950 out:
 951 #endif
 952     return ret;
 953 }
 954
 955 const char *object_get_typename(const Object *obj)
 956 {
 957     return obj->class->type->name;
 958 }
 959
 960 ObjectClass *object_get_class(Object *obj)
 961 {
 962     return obj->class;
 963 }
 964
 965 bool object_class_is_abstract(ObjectClass *klass)
 966 {
 967     return klass->type->abstract;
 968 }
 969
 970 const char *object_class_get_name(ObjectClass *klass)
 971 {
 972     return klass->type->name;
 973 }
 974
 975 ObjectClass *object_class_by_name(const char *typename)
 976 {
 977     TypeImpl *type = type_get_by_name(typename);
 978
 979     if (!type) {
 980         return NULL;
 981     }
 982
 983     type_initialize(type);
 984
 985     return type->class;
 986 }
 987
 988 ObjectClass *module_object_class_by_name(const char *typename)
 989 {
 990     ObjectClass *oc;
 991
 992     oc = object_class_by_name(typename);
 993 #ifdef CONFIG_MODULES
 994     if (!oc) {
 995         module_load_qom_one(typename);
 996         oc = object_class_by_name(typename);
 997     }
 998 #endif
 999     return oc;
1000 }
1001
1002 ObjectClass *object_class_get_parent(ObjectClass *class)
1003 {
1004     TypeImpl *type = type_get_parent(class->type);
1005
1006     if (!type) {
1007         return NULL;
1008     }
1009
1010     type_initialize(type);
1011
1012     return type->class;
1013 }
1014
1015 typedef struct OCFData
1016 {
1017     void (*fn)(ObjectClass *klass, void *opaque);
1018     const char *implements_type;
1019     bool include_abstract;
1020     void *opaque;
1021 } OCFData;
1022
1023 static void object_class_foreach_tramp(gpointer key, gpointer value,
1024                                        gpointer opaque)
1025 {
1026     OCFData *data = opaque;
1027     TypeImpl *type = value;
1028     ObjectClass *k;
1029
1030     type_initialize(type);
1031     k = type->class;
1032
1033     if (!data->include_abstract && type->abstract) {
1034         return;
1035     }
1036
1037     if (data->implements_type &&
1038         !object_class_dynamic_cast(k, data->implements_type)) {
1039         return;
1040     }
1041
1042     data->fn(k, data->opaque);
1043 }
1044
1045 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1046                           const char *implements_type, bool include_abstract,
1047                           void *opaque)
1048 {
1049     OCFData data = { fn, implements_type, include_abstract, opaque };
1050
1051     enumerating_types = true;
1052     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1053     enumerating_types = false;
1054 }
1055
1056 static int do_object_child_foreach(Object *obj,
1057                                    int (*fn)(Object *child, void *opaque),
1058                                    void *opaque, bool recurse)
1059 {
1060     GHashTableIter iter;
1061     ObjectProperty *prop;
1062     int ret = 0;
1063
1064     g_hash_table_iter_init(&iter, obj->properties);
1065     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1066         if (object_property_is_child(prop)) {
1067             Object *child = prop->opaque;
1068
1069             ret = fn(child, opaque);
1070             if (ret != 0) {
1071                 break;
1072             }
1073             if (recurse) {
1074                 ret = do_object_child_foreach(child, fn, opaque, true);
1075                 if (ret != 0) {
1076                     break;
1077                 }
1078             }
1079         }
1080     }
1081     return ret;
1082 }
1083
1084 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1085                          void *opaque)
1086 {
1087     return do_object_child_foreach(obj, fn, opaque, false);
1088 }
1089
1090 int object_child_foreach_recursive(Object *obj,
1091                                    int (*fn)(Object *child, void *opaque),
1092                                    void *opaque)
1093 {
1094     return do_object_child_foreach(obj, fn, opaque, true);
1095 }
1096
1097 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1098 {
1099     GSList **list = opaque;
1100
1101     *list = g_slist_prepend(*list, klass);
1102 }
1103
1104 GSList *object_class_get_list(const char *implements_type,
1105                               bool include_abstract)
1106 {
1107     GSList *list = NULL;
1108
1109     object_class_foreach(object_class_get_list_tramp,
1110                          implements_type, include_abstract, &list);
1111     return list;
1112 }
1113
1114 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1115 {
1116     return strcasecmp(object_class_get_name((ObjectClass *)a),
1117                       object_class_get_name((ObjectClass *)b));
1118 }
1119
1120 GSList *object_class_get_list_sorted(const char *implements_type,
1121                                      bool include_abstract)
1122 {
1123     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1124                         object_class_cmp);
1125 }
1126
1127 Object *object_ref(Object *obj)
1128 {
1129     if (!obj) {
1130         return NULL;
1131     }
1132     atomic_inc(&obj->ref);
1133     return obj;
1134 }
1135
1136 void object_unref(Object *obj)
1137 {
1138     if (!obj) {
1139         return;
1140     }
1141     g_assert(obj->ref > 0);
1142
1143     /* parent always holds a reference to its children */
1144     if (atomic_fetch_dec(&obj->ref) == 1) {
1145         object_finalize(obj);
1146     }
1147 }
1148
1149 static ObjectProperty *
1150 object_property_try_add(Object *obj, const char *name, const char *type,
1151                         ObjectPropertyAccessor *get,
1152                         ObjectPropertyAccessor *set,
1153                         ObjectPropertyRelease *release,
1154                         void *opaque, Error **errp)
1155 {
1156     ObjectProperty *prop;
1157     size_t name_len = strlen(name);
1158
1159     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1160         int i;
1161         ObjectProperty *ret;
1162         char *name_no_array = g_strdup(name);
1163
1164         name_no_array[name_len - 3] = '\0';
1165         for (i = 0; ; ++i) {
1166             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1167
1168             ret = object_property_try_add(obj, full_name, type, get, set,
1169                                           release, opaque, NULL);
1170             g_free(full_name);
1171             if (ret) {
1172                 break;
1173             }
1174         }
1175         g_free(name_no_array);
1176         return ret;
1177     }
1178
1179     if (object_property_find(obj, name, NULL) != NULL) {
1180         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1181                    name, object_get_typename(obj));
1182         return NULL;
1183     }
1184
1185     prop = g_malloc0(sizeof(*prop));
1186
1187     prop->name = g_strdup(name);
1188     prop->type = g_strdup(type);
1189
1190     prop->get = get;
1191     prop->set = set;
1192     prop->release = release;
1193     prop->opaque = opaque;
1194
1195     g_hash_table_insert(obj->properties, prop->name, prop);
1196     return prop;
1197 }
1198
1199 ObjectProperty *
1200 object_property_add(Object *obj, const char *name, const char *type,
1201                     ObjectPropertyAccessor *get,
1202                     ObjectPropertyAccessor *set,
1203                     ObjectPropertyRelease *release,
1204                     void *opaque)
1205 {
1206     return object_property_try_add(obj, name, type, get, set, release,
1207                                    opaque, &error_abort);
1208 }
1209
1210 ObjectProperty *
1211 object_class_property_add(ObjectClass *klass,
1212                           const char *name,
1213                           const char *type,
1214                           ObjectPropertyAccessor *get,
1215                           ObjectPropertyAccessor *set,
1216                           ObjectPropertyRelease *release,
1217                           void *opaque)
1218 {
1219     ObjectProperty *prop;
1220
1221     assert(!object_class_property_find(klass, name, NULL));
1222
1223     prop = g_malloc0(sizeof(*prop));
1224
1225     prop->name = g_strdup(name);
1226     prop->type = g_strdup(type);
1227
1228     prop->get = get;
1229     prop->set = set;
1230     prop->release = release;
1231     prop->opaque = opaque;
1232
1233     g_hash_table_insert(klass->properties, prop->name, prop);
1234
1235     return prop;
1236 }
1237
1238 ObjectProperty *object_property_find(Object *obj, const char *name,
1239                                      Error **errp)
1240 {
1241     ObjectProperty *prop;
1242     ObjectClass *klass = object_get_class(obj);
1243
1244     prop = object_class_property_find(klass, name, NULL);
1245     if (prop) {
1246         return prop;
1247     }
1248
1249     prop = g_hash_table_lookup(obj->properties, name);
1250     if (prop) {
1251         return prop;
1252     }
1253
1254     error_setg(errp, "Property '.%s' not found", name);
1255     return NULL;
1256 }
1257
1258 void object_property_iter_init(ObjectPropertyIterator *iter,
1259                                Object *obj)
1260 {
1261     g_hash_table_iter_init(&iter->iter, obj->properties);
1262     iter->nextclass = object_get_class(obj);
1263 }
1264
1265 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1266 {
1267     gpointer key, val;
1268     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1269         if (!iter->nextclass) {
1270             return NULL;
1271         }
1272         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1273         iter->nextclass = object_class_get_parent(iter->nextclass);
1274     }
1275     return val;
1276 }
1277
1278 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1279                                      ObjectClass *klass)
1280 {
1281     g_hash_table_iter_init(&iter->iter, klass->properties);
1282     iter->nextclass = object_class_get_parent(klass);
1283 }
1284
1285 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1286                                            Error **errp)
1287 {
1288     ObjectProperty *prop;
1289     ObjectClass *parent_klass;
1290
1291     parent_klass = object_class_get_parent(klass);
1292     if (parent_klass) {
1293         prop = object_class_property_find(parent_klass, name, NULL);
1294         if (prop) {
1295             return prop;
1296         }
1297     }
1298
1299     prop = g_hash_table_lookup(klass->properties, name);
1300     if (!prop) {
1301         error_setg(errp, "Property '.%s' not found", name);
1302     }
1303     return prop;
1304 }
1305
1306 void object_property_del(Object *obj, const char *name)
1307 {
1308     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1309
1310     if (prop->release) {
1311         prop->release(obj, name, prop->opaque);
1312     }
1313     g_hash_table_remove(obj->properties, name);
1314 }
1315
1316 bool object_property_get(Object *obj, const char *name, Visitor *v,
1317                          Error **errp)
1318 {
1319     Error *err = NULL;
1320     ObjectProperty *prop = object_property_find(obj, name, errp);
1321
1322     if (prop == NULL) {
1323         return false;
1324     }
1325
1326     if (!prop->get) {
1327         error_setg(errp, QERR_PERMISSION_DENIED);
1328         return false;
1329     }
1330     prop->get(obj, v, name, prop->opaque, &err);
1331     error_propagate(errp, err);
1332     return !err;
1333 }
1334
1335 bool object_property_set(Object *obj, const char *name, Visitor *v,
1336                          Error **errp)
1337 {
1338     Error *err = NULL;
1339     ObjectProperty *prop = object_property_find(obj, name, errp);
1340
1341     if (prop == NULL) {
1342         return false;
1343     }
1344
1345     if (!prop->set) {
1346         error_setg(errp, QERR_PERMISSION_DENIED);
1347         return false;
1348     }
1349     prop->set(obj, v, name, prop->opaque, &err);
1350     error_propagate(errp, err);
1351     return !err;
1352 }
1353
1354 bool object_property_set_str(Object *obj, const char *name,
1355                              const char *value, Error **errp)
1356 {
1357     QString *qstr = qstring_from_str(value);
1358     bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp);
1359
1360     qobject_unref(qstr);
1361     return ok;
1362 }
1363
1364 char *object_property_get_str(Object *obj, const char *name,
1365                               Error **errp)
1366 {
1367     QObject *ret = object_property_get_qobject(obj, name, errp);
1368     char *retval;
1369
1370     if (!ret) {
1371         return NULL;
1372     }
1373
1374     retval = g_strdup(qobject_get_try_str(ret));
1375     if (!retval) {
1376         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1377     }
1378
1379     qobject_unref(ret);
1380     return retval;
1381 }
1382
1383 bool object_property_set_link(Object *obj, const char *name,
1384                               Object *value, Error **errp)
1385 {
1386     g_autofree char *path = NULL;
1387
1388     if (value) {
1389         path = object_get_canonical_path(value);
1390     }
1391     return object_property_set_str(obj, name, path ?: "", errp);
1392 }
1393
1394 Object *object_property_get_link(Object *obj, const char *name,
1395                                  Error **errp)
1396 {
1397     char *str = object_property_get_str(obj, name, errp);
1398     Object *target = NULL;
1399
1400     if (str && *str) {
1401         target = object_resolve_path(str, NULL);
1402         if (!target) {
1403             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1404                       "Device '%s' not found", str);
1405         }
1406     }
1407
1408     g_free(str);
1409     return target;
1410 }
1411
1412 bool object_property_set_bool(Object *obj, const char *name,
1413                               bool value, Error **errp)
1414 {
1415     QBool *qbool = qbool_from_bool(value);
1416     bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp);
1417
1418     qobject_unref(qbool);
1419     return ok;
1420 }
1421
1422 bool object_property_get_bool(Object *obj, const char *name,
1423                               Error **errp)
1424 {
1425     QObject *ret = object_property_get_qobject(obj, name, errp);
1426     QBool *qbool;
1427     bool retval;
1428
1429     if (!ret) {
1430         return false;
1431     }
1432     qbool = qobject_to(QBool, ret);
1433     if (!qbool) {
1434         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1435         retval = false;
1436     } else {
1437         retval = qbool_get_bool(qbool);
1438     }
1439
1440     qobject_unref(ret);
1441     return retval;
1442 }
1443
1444 bool object_property_set_int(Object *obj, const char *name,
1445                              int64_t value, Error **errp)
1446 {
1447     QNum *qnum = qnum_from_int(value);
1448     bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1449
1450     qobject_unref(qnum);
1451     return ok;
1452 }
1453
1454 int64_t object_property_get_int(Object *obj, const char *name,
1455                                 Error **errp)
1456 {
1457     QObject *ret = object_property_get_qobject(obj, name, errp);
1458     QNum *qnum;
1459     int64_t retval;
1460
1461     if (!ret) {
1462         return -1;
1463     }
1464
1465     qnum = qobject_to(QNum, ret);
1466     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1467         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1468         retval = -1;
1469     }
1470
1471     qobject_unref(ret);
1472     return retval;
1473 }
1474
1475 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1476 {
1477     Visitor *v = qobject_input_visitor_new(prop->defval);
1478
1479     assert(prop->set != NULL);
1480     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1481
1482     visit_free(v);
1483 }
1484
1485 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1486 {
1487     assert(!prop->defval);
1488     assert(!prop->init);
1489
1490     prop->defval = defval;
1491     prop->init = object_property_init_defval;
1492 }
1493
1494 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1495 {
1496     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1497 }
1498
1499 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1500 {
1501     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1502 }
1503
1504 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1505 {
1506     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1507 }
1508
1509 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1510 {
1511     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1512 }
1513
1514 bool object_property_set_uint(Object *obj, const char *name,
1515                               uint64_t value, Error **errp)
1516 {
1517     QNum *qnum = qnum_from_uint(value);
1518     bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1519
1520     qobject_unref(qnum);
1521     return ok;
1522 }
1523
1524 uint64_t object_property_get_uint(Object *obj, const char *name,
1525                                   Error **errp)
1526 {
1527     QObject *ret = object_property_get_qobject(obj, name, errp);
1528     QNum *qnum;
1529     uint64_t retval;
1530
1531     if (!ret) {
1532         return 0;
1533     }
1534     qnum = qobject_to(QNum, ret);
1535     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1536         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1537         retval = 0;
1538     }
1539
1540     qobject_unref(ret);
1541     return retval;
1542 }
1543
1544 typedef struct EnumProperty {
1545     const QEnumLookup *lookup;
1546     int (*get)(Object *, Error **);
1547     void (*set)(Object *, int, Error **);
1548 } EnumProperty;
1549
1550 int object_property_get_enum(Object *obj, const char *name,
1551                              const char *typename, Error **errp)
1552 {
1553     char *str;
1554     int ret;
1555     ObjectProperty *prop = object_property_find(obj, name, errp);
1556     EnumProperty *enumprop;
1557
1558     if (prop == NULL) {
1559         return 0;
1560     }
1561
1562     if (!g_str_equal(prop->type, typename)) {
1563         error_setg(errp, "Property %s on %s is not '%s' enum type",
1564                    name, object_class_get_name(
1565                        object_get_class(obj)), typename);
1566         return 0;
1567     }
1568
1569     enumprop = prop->opaque;
1570
1571     str = object_property_get_str(obj, name, errp);
1572     if (!str) {
1573         return 0;
1574     }
1575
1576     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1577     g_free(str);
1578
1579     return ret;
1580 }
1581
1582 bool object_property_parse(Object *obj, const char *name,
1583                            const char *string, Error **errp)
1584 {
1585     Visitor *v = string_input_visitor_new(string);
1586     bool ok = object_property_set(obj, name, v, errp);
1587
1588     visit_free(v);
1589     return ok;
1590 }
1591
1592 char *object_property_print(Object *obj, const char *name, bool human,
1593                             Error **errp)
1594 {
1595     Visitor *v;
1596     char *string = NULL;
1597
1598     v = string_output_visitor_new(human, &string);
1599     if (!object_property_get(obj, name, v, errp)) {
1600         goto out;
1601     }
1602
1603     visit_complete(v, &string);
1604
1605 out:
1606     visit_free(v);
1607     return string;
1608 }
1609
1610 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1611 {
1612     ObjectProperty *prop = object_property_find(obj, name, errp);
1613     if (prop == NULL) {
1614         return NULL;
1615     }
1616
1617     return prop->type;
1618 }
1619
1620 Object *object_get_root(void)
1621 {
1622     static Object *root;
1623
1624     if (!root) {
1625         root = object_new("container");
1626     }
1627
1628     return root;
1629 }
1630
1631 Object *object_get_objects_root(void)
1632 {
1633     return container_get(object_get_root(), "/objects");
1634 }
1635
1636 Object *object_get_internal_root(void)
1637 {
1638     static Object *internal_root;
1639
1640     if (!internal_root) {
1641         internal_root = object_new("container");
1642     }
1643
1644     return internal_root;
1645 }
1646
1647 static void object_get_child_property(Object *obj, Visitor *v,
1648                                       const char *name, void *opaque,
1649                                       Error **errp)
1650 {
1651     Object *child = opaque;
1652     char *path;
1653
1654     path = object_get_canonical_path(child);
1655     visit_type_str(v, name, &path, errp);
1656     g_free(path);
1657 }
1658
1659 static Object *object_resolve_child_property(Object *parent, void *opaque,
1660                                              const char *part)
1661 {
1662     return opaque;
1663 }
1664
1665 static void object_finalize_child_property(Object *obj, const char *name,
1666                                            void *opaque)
1667 {
1668     Object *child = opaque;
1669
1670     if (child->class->unparent) {
1671         (child->class->unparent)(child);
1672     }
1673     child->parent = NULL;
1674     object_unref(child);
1675 }
1676
1677 ObjectProperty *
1678 object_property_add_child(Object *obj, const char *name,
1679                           Object *child)
1680 {
1681     g_autofree char *type = NULL;
1682     ObjectProperty *op;
1683
1684     assert(!child->parent);
1685
1686     type = g_strdup_printf("child<%s>", object_get_typename(child));
1687
1688     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1689                              object_finalize_child_property, child);
1690     op->resolve = object_resolve_child_property;
1691     object_ref(child);
1692     child->parent = obj;
1693     return op;
1694 }
1695
1696 void object_property_allow_set_link(const Object *obj, const char *name,
1697                                     Object *val, Error **errp)
1698 {
1699     /* Allow the link to be set, always */
1700 }
1701
1702 typedef struct {
1703     union {
1704         Object **targetp;
1705         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1706         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1707     };
1708     void (*check)(const Object *, const char *, Object *, Error **);
1709     ObjectPropertyLinkFlags flags;
1710 } LinkProperty;
1711
1712 static Object **
1713 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1714 {
1715     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1716         return &lprop->target;
1717     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1718         return (void *)obj + lprop->offset;
1719     } else {
1720         return lprop->targetp;
1721     }
1722 }
1723
1724 static void object_get_link_property(Object *obj, Visitor *v,
1725                                      const char *name, void *opaque,
1726                                      Error **errp)
1727 {
1728     LinkProperty *lprop = opaque;
1729     Object **targetp = object_link_get_targetp(obj, lprop);
1730     char *path;
1731
1732     if (*targetp) {
1733         path = object_get_canonical_path(*targetp);
1734         visit_type_str(v, name, &path, errp);
1735         g_free(path);
1736     } else {
1737         path = (char *)"";
1738         visit_type_str(v, name, &path, errp);
1739     }
1740 }
1741
1742 /*
1743  * object_resolve_link:
1744  *
1745  * Lookup an object and ensure its type matches the link property type.  This
1746  * is similar to object_resolve_path() except type verification against the
1747  * link property is performed.
1748  *
1749  * Returns: The matched object or NULL on path lookup failures.
1750  */
1751 static Object *object_resolve_link(Object *obj, const char *name,
1752                                    const char *path, Error **errp)
1753 {
1754     const char *type;
1755     char *target_type;
1756     bool ambiguous = false;
1757     Object *target;
1758
1759     /* Go from link<FOO> to FOO.  */
1760     type = object_property_get_type(obj, name, NULL);
1761     target_type = g_strndup(&type[5], strlen(type) - 6);
1762     target = object_resolve_path_type(path, target_type, &ambiguous);
1763
1764     if (ambiguous) {
1765         error_setg(errp, "Path '%s' does not uniquely identify an object",
1766                    path);
1767     } else if (!target) {
1768         target = object_resolve_path(path, &ambiguous);
1769         if (target || ambiguous) {
1770             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1771         } else {
1772             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1773                       "Device '%s' not found", path);
1774         }
1775         target = NULL;
1776     }
1777     g_free(target_type);
1778
1779     return target;
1780 }
1781
1782 static void object_set_link_property(Object *obj, Visitor *v,
1783                                      const char *name, void *opaque,
1784                                      Error **errp)
1785 {
1786     Error *local_err = NULL;
1787     LinkProperty *prop = opaque;
1788     Object **targetp = object_link_get_targetp(obj, prop);
1789     Object *old_target = *targetp;
1790     Object *new_target;
1791     char *path = NULL;
1792
1793     if (!visit_type_str(v, name, &path, errp)) {
1794         return;
1795     }
1796
1797     if (*path) {
1798         new_target = object_resolve_link(obj, name, path, errp);
1799         if (!new_target) {
1800             g_free(path);
1801             return;
1802         }
1803     } else {
1804         new_target = NULL;
1805     }
1806
1807     g_free(path);
1808
1809     prop->check(obj, name, new_target, &local_err);
1810     if (local_err) {
1811         error_propagate(errp, local_err);
1812         return;
1813     }
1814
1815     *targetp = new_target;
1816     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1817         object_ref(new_target);
1818         object_unref(old_target);
1819     }
1820 }
1821
1822 static Object *object_resolve_link_property(Object *parent, void *opaque,
1823                                             const char *part)
1824 {
1825     LinkProperty *lprop = opaque;
1826
1827     return *object_link_get_targetp(parent, lprop);
1828 }
1829
1830 static void object_release_link_property(Object *obj, const char *name,
1831                                          void *opaque)
1832 {
1833     LinkProperty *prop = opaque;
1834     Object **targetp = object_link_get_targetp(obj, prop);
1835
1836     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1837         object_unref(*targetp);
1838     }
1839     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1840         g_free(prop);
1841     }
1842 }
1843
1844 static ObjectProperty *
1845 object_add_link_prop(Object *obj, const char *name,
1846                      const char *type, void *ptr,
1847                      void (*check)(const Object *, const char *,
1848                                    Object *, Error **),
1849                      ObjectPropertyLinkFlags flags)
1850 {
1851     LinkProperty *prop = g_malloc(sizeof(*prop));
1852     g_autofree char *full_type = NULL;
1853     ObjectProperty *op;
1854
1855     if (flags & OBJ_PROP_LINK_DIRECT) {
1856         prop->target = ptr;
1857     } else {
1858         prop->targetp = ptr;
1859     }
1860     prop->check = check;
1861     prop->flags = flags;
1862
1863     full_type = g_strdup_printf("link<%s>", type);
1864
1865     op = object_property_add(obj, name, full_type,
1866                              object_get_link_property,
1867                              check ? object_set_link_property : NULL,
1868                              object_release_link_property,
1869                              prop);
1870     op->resolve = object_resolve_link_property;
1871     return op;
1872 }
1873
1874 ObjectProperty *
1875 object_property_add_link(Object *obj, const char *name,
1876                          const char *type, Object **targetp,
1877                          void (*check)(const Object *, const char *,
1878                                        Object *, Error **),
1879                          ObjectPropertyLinkFlags flags)
1880 {
1881     return object_add_link_prop(obj, name, type, targetp, check, flags);
1882 }
1883
1884 ObjectProperty *
1885 object_class_property_add_link(ObjectClass *oc,
1886     const char *name,
1887     const char *type, ptrdiff_t offset,
1888     void (*check)(const Object *obj, const char *name,
1889                   Object *val, Error **errp),
1890     ObjectPropertyLinkFlags flags)
1891 {
1892     LinkProperty *prop = g_new0(LinkProperty, 1);
1893     char *full_type;
1894     ObjectProperty *op;
1895
1896     prop->offset = offset;
1897     prop->check = check;
1898     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1899
1900     full_type = g_strdup_printf("link<%s>", type);
1901
1902     op = object_class_property_add(oc, name, full_type,
1903                                    object_get_link_property,
1904                                    check ? object_set_link_property : NULL,
1905                                    object_release_link_property,
1906                                    prop);
1907
1908     op->resolve = object_resolve_link_property;
1909
1910     g_free(full_type);
1911     return op;
1912 }
1913
1914 ObjectProperty *
1915 object_property_add_const_link(Object *obj, const char *name,
1916                                Object *target)
1917 {
1918     return object_add_link_prop(obj, name,
1919                                 object_get_typename(target), target,
1920                                 NULL, OBJ_PROP_LINK_DIRECT);
1921 }
1922
1923 char *object_get_canonical_path_component(const Object *obj)
1924 {
1925     ObjectProperty *prop = NULL;
1926     GHashTableIter iter;
1927
1928     if (obj->parent == NULL) {
1929         return NULL;
1930     }
1931
1932     g_hash_table_iter_init(&iter, obj->parent->properties);
1933     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1934         if (!object_property_is_child(prop)) {
1935             continue;
1936         }
1937
1938         if (prop->opaque == obj) {
1939             return g_strdup(prop->name);
1940         }
1941     }
1942
1943     /* obj had a parent but was not a child, should never happen */
1944     g_assert_not_reached();
1945     return NULL;
1946 }
1947
1948 char *object_get_canonical_path(const Object *obj)
1949 {
1950     Object *root = object_get_root();
1951     char *newpath, *path = NULL;
1952
1953     if (obj == root) {
1954         return g_strdup("/");
1955     }
1956
1957     do {
1958         char *component = object_get_canonical_path_component(obj);
1959
1960         if (!component) {
1961             /* A canonical path must be complete, so discard what was
1962              * collected so far.
1963              */
1964             g_free(path);
1965             return NULL;
1966         }
1967
1968         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1969         g_free(path);
1970         g_free(component);
1971         path = newpath;
1972         obj = obj->parent;
1973     } while (obj != root);
1974
1975     return path;
1976 }
1977
1978 Object *object_resolve_path_component(Object *parent, const char *part)
1979 {
1980     ObjectProperty *prop = object_property_find(parent, part, NULL);
1981     if (prop == NULL) {
1982         return NULL;
1983     }
1984
1985     if (prop->resolve) {
1986         return prop->resolve(parent, prop->opaque, part);
1987     } else {
1988         return NULL;
1989     }
1990 }
1991
1992 static Object *object_resolve_abs_path(Object *parent,
1993                                           char **parts,
1994                                           const char *typename)
1995 {
1996     Object *child;
1997
1998     if (*parts == NULL) {
1999         return object_dynamic_cast(parent, typename);
2000     }
2001
2002     if (strcmp(*parts, "") == 0) {
2003         return object_resolve_abs_path(parent, parts + 1, typename);
2004     }
2005
2006     child = object_resolve_path_component(parent, *parts);
2007     if (!child) {
2008         return NULL;
2009     }
2010
2011     return object_resolve_abs_path(child, parts + 1, typename);
2012 }
2013
2014 static Object *object_resolve_partial_path(Object *parent,
2015                                            char **parts,
2016                                            const char *typename,
2017                                            bool *ambiguous)
2018 {
2019     Object *obj;
2020     GHashTableIter iter;
2021     ObjectProperty *prop;
2022
2023     obj = object_resolve_abs_path(parent, parts, typename);
2024
2025     g_hash_table_iter_init(&iter, parent->properties);
2026     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2027         Object *found;
2028
2029         if (!object_property_is_child(prop)) {
2030             continue;
2031         }
2032
2033         found = object_resolve_partial_path(prop->opaque, parts,
2034                                             typename, ambiguous);
2035         if (found) {
2036             if (obj) {
2037                 *ambiguous = true;
2038                 return NULL;
2039             }
2040             obj = found;
2041         }
2042
2043         if (*ambiguous) {
2044             return NULL;
2045         }
2046     }
2047
2048     return obj;
2049 }
2050
2051 Object *object_resolve_path_type(const char *path, const char *typename,
2052                                  bool *ambiguousp)
2053 {
2054     Object *obj;
2055     char **parts;
2056
2057     parts = g_strsplit(path, "/", 0);
2058     assert(parts);
2059
2060     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2061         bool ambiguous = false;
2062         obj = object_resolve_partial_path(object_get_root(), parts,
2063                                           typename, &ambiguous);
2064         if (ambiguousp) {
2065             *ambiguousp = ambiguous;
2066         }
2067     } else {
2068         obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2069     }
2070
2071     g_strfreev(parts);
2072
2073     return obj;
2074 }
2075
2076 Object *object_resolve_path(const char *path, bool *ambiguous)
2077 {
2078     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2079 }
2080
2081 typedef struct StringProperty
2082 {
2083     char *(*get)(Object *, Error **);
2084     void (*set)(Object *, const char *, Error **);
2085 } StringProperty;
2086
2087 static void property_get_str(Object *obj, Visitor *v, const char *name,
2088                              void *opaque, Error **errp)
2089 {
2090     StringProperty *prop = opaque;
2091     char *value;
2092     Error *err = NULL;
2093
2094     value = prop->get(obj, &err);
2095     if (err) {
2096         error_propagate(errp, err);
2097         return;
2098     }
2099
2100     visit_type_str(v, name, &value, errp);
2101     g_free(value);
2102 }
2103
2104 static void property_set_str(Object *obj, Visitor *v, const char *name,
2105                              void *opaque, Error **errp)
2106 {
2107     StringProperty *prop = opaque;
2108     char *value;
2109
2110     if (!visit_type_str(v, name, &value, errp)) {
2111         return;
2112     }
2113
2114     prop->set(obj, value, errp);
2115     g_free(value);
2116 }
2117
2118 static void property_release_str(Object *obj, const char *name,
2119                                  void *opaque)
2120 {
2121     StringProperty *prop = opaque;
2122     g_free(prop);
2123 }
2124
2125 ObjectProperty *
2126 object_property_add_str(Object *obj, const char *name,
2127                         char *(*get)(Object *, Error **),
2128                         void (*set)(Object *, const char *, Error **))
2129 {
2130     StringProperty *prop = g_malloc0(sizeof(*prop));
2131
2132     prop->get = get;
2133     prop->set = set;
2134
2135     return object_property_add(obj, name, "string",
2136                                get ? property_get_str : NULL,
2137                                set ? property_set_str : NULL,
2138                                property_release_str,
2139                                prop);
2140 }
2141
2142 ObjectProperty *
2143 object_class_property_add_str(ObjectClass *klass, const char *name,
2144                                    char *(*get)(Object *, Error **),
2145                                    void (*set)(Object *, const char *,
2146                                                Error **))
2147 {
2148     StringProperty *prop = g_malloc0(sizeof(*prop));
2149
2150     prop->get = get;
2151     prop->set = set;
2152
2153     return object_class_property_add(klass, name, "string",
2154                                      get ? property_get_str : NULL,
2155                                      set ? property_set_str : NULL,
2156                                      NULL,
2157                                      prop);
2158 }
2159
2160 typedef struct BoolProperty
2161 {
2162     bool (*get)(Object *, Error **);
2163     void (*set)(Object *, bool, Error **);
2164 } BoolProperty;
2165
2166 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2167                               void *opaque, Error **errp)
2168 {
2169     BoolProperty *prop = opaque;
2170     bool value;
2171     Error *err = NULL;
2172
2173     value = prop->get(obj, &err);
2174     if (err) {
2175         error_propagate(errp, err);
2176         return;
2177     }
2178
2179     visit_type_bool(v, name, &value, errp);
2180 }
2181
2182 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2183                               void *opaque, Error **errp)
2184 {
2185     BoolProperty *prop = opaque;
2186     bool value;
2187
2188     if (!visit_type_bool(v, name, &value, errp)) {
2189         return;
2190     }
2191
2192     prop->set(obj, value, errp);
2193 }
2194
2195 static void property_release_bool(Object *obj, const char *name,
2196                                   void *opaque)
2197 {
2198     BoolProperty *prop = opaque;
2199     g_free(prop);
2200 }
2201
2202 ObjectProperty *
2203 object_property_add_bool(Object *obj, const char *name,
2204                          bool (*get)(Object *, Error **),
2205                          void (*set)(Object *, bool, Error **))
2206 {
2207     BoolProperty *prop = g_malloc0(sizeof(*prop));
2208
2209     prop->get = get;
2210     prop->set = set;
2211
2212     return object_property_add(obj, name, "bool",
2213                                get ? property_get_bool : NULL,
2214                                set ? property_set_bool : NULL,
2215                                property_release_bool,
2216                                prop);
2217 }
2218
2219 ObjectProperty *
2220 object_class_property_add_bool(ObjectClass *klass, const char *name,
2221                                     bool (*get)(Object *, Error **),
2222                                     void (*set)(Object *, bool, Error **))
2223 {
2224     BoolProperty *prop = g_malloc0(sizeof(*prop));
2225
2226     prop->get = get;
2227     prop->set = set;
2228
2229     return object_class_property_add(klass, name, "bool",
2230                                      get ? property_get_bool : NULL,
2231                                      set ? property_set_bool : NULL,
2232                                      NULL,
2233                                      prop);
2234 }
2235
2236 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2237                               void *opaque, Error **errp)
2238 {
2239     EnumProperty *prop = opaque;
2240     int value;
2241     Error *err = NULL;
2242
2243     value = prop->get(obj, &err);
2244     if (err) {
2245         error_propagate(errp, err);
2246         return;
2247     }
2248
2249     visit_type_enum(v, name, &value, prop->lookup, errp);
2250 }
2251
2252 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2253                               void *opaque, Error **errp)
2254 {
2255     EnumProperty *prop = opaque;
2256     int value;
2257
2258     if (!visit_type_enum(v, name, &value, prop->lookup, errp)) {
2259         return;
2260     }
2261     prop->set(obj, value, errp);
2262 }
2263
2264 static void property_release_enum(Object *obj, const char *name,
2265                                   void *opaque)
2266 {
2267     EnumProperty *prop = opaque;
2268     g_free(prop);
2269 }
2270
2271 ObjectProperty *
2272 object_property_add_enum(Object *obj, const char *name,
2273                          const char *typename,
2274                          const QEnumLookup *lookup,
2275                          int (*get)(Object *, Error **),
2276                          void (*set)(Object *, int, Error **))
2277 {
2278     EnumProperty *prop = g_malloc(sizeof(*prop));
2279
2280     prop->lookup = lookup;
2281     prop->get = get;
2282     prop->set = set;
2283
2284     return object_property_add(obj, name, typename,
2285                                get ? property_get_enum : NULL,
2286                                set ? property_set_enum : NULL,
2287                                property_release_enum,
2288                                prop);
2289 }
2290
2291 ObjectProperty *
2292 object_class_property_add_enum(ObjectClass *klass, const char *name,
2293                                     const char *typename,
2294                                     const QEnumLookup *lookup,
2295                                     int (*get)(Object *, Error **),
2296                                     void (*set)(Object *, int, Error **))
2297 {
2298     EnumProperty *prop = g_malloc(sizeof(*prop));
2299
2300     prop->lookup = lookup;
2301     prop->get = get;
2302     prop->set = set;
2303
2304     return object_class_property_add(klass, name, typename,
2305                                      get ? property_get_enum : NULL,
2306                                      set ? property_set_enum : NULL,
2307                                      NULL,
2308                                      prop);
2309 }
2310
2311 typedef struct TMProperty {
2312     void (*get)(Object *, struct tm *, Error **);
2313 } TMProperty;
2314
2315 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2316                             void *opaque, Error **errp)
2317 {
2318     TMProperty *prop = opaque;
2319     Error *err = NULL;
2320     struct tm value;
2321
2322     prop->get(obj, &value, &err);
2323     if (err) {
2324         error_propagate(errp, err);
2325         return;
2326     }
2327
2328     if (!visit_start_struct(v, name, NULL, 0, errp)) {
2329         return;
2330     }
2331     if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
2332         goto out_end;
2333     }
2334     if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
2335         goto out_end;
2336     }
2337     if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
2338         goto out_end;
2339     }
2340     if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
2341         goto out_end;
2342     }
2343     if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
2344         goto out_end;
2345     }
2346     if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
2347         goto out_end;
2348     }
2349     visit_check_struct(v, errp);
2350 out_end:
2351     visit_end_struct(v, NULL);
2352 }
2353
2354 static void property_release_tm(Object *obj, const char *name,
2355                                 void *opaque)
2356 {
2357     TMProperty *prop = opaque;
2358     g_free(prop);
2359 }
2360
2361 ObjectProperty *
2362 object_property_add_tm(Object *obj, const char *name,
2363                        void (*get)(Object *, struct tm *, Error **))
2364 {
2365     TMProperty *prop = g_malloc0(sizeof(*prop));
2366
2367     prop->get = get;
2368
2369     return object_property_add(obj, name, "struct tm",
2370                                get ? property_get_tm : NULL, NULL,
2371                                property_release_tm,
2372                                prop);
2373 }
2374
2375 ObjectProperty *
2376 object_class_property_add_tm(ObjectClass *klass, const char *name,
2377                              void (*get)(Object *, struct tm *, Error **))
2378 {
2379     TMProperty *prop = g_malloc0(sizeof(*prop));
2380
2381     prop->get = get;
2382
2383     return object_class_property_add(klass, name, "struct tm",
2384                                      get ? property_get_tm : NULL,
2385                                      NULL, NULL, prop);
2386 }
2387
2388 static char *object_get_type(Object *obj, Error **errp)
2389 {
2390     return g_strdup(object_get_typename(obj));
2391 }
2392
2393 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2394                                    void *opaque, Error **errp)
2395 {
2396     uint8_t value = *(uint8_t *)opaque;
2397     visit_type_uint8(v, name, &value, errp);
2398 }
2399
2400 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2401                                    void *opaque, Error **errp)
2402 {
2403     uint8_t *field = opaque;
2404     uint8_t value;
2405
2406     if (!visit_type_uint8(v, name, &value, errp)) {
2407         return;
2408     }
2409
2410     *field = value;
2411 }
2412
2413 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2414                                     void *opaque, Error **errp)
2415 {
2416     uint16_t value = *(uint16_t *)opaque;
2417     visit_type_uint16(v, name, &value, errp);
2418 }
2419
2420 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2421                                     void *opaque, Error **errp)
2422 {
2423     uint16_t *field = opaque;
2424     uint16_t value;
2425
2426     if (!visit_type_uint16(v, name, &value, errp)) {
2427         return;
2428     }
2429
2430     *field = value;
2431 }
2432
2433 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2434                                     void *opaque, Error **errp)
2435 {
2436     uint32_t value = *(uint32_t *)opaque;
2437     visit_type_uint32(v, name, &value, errp);
2438 }
2439
2440 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2441                                     void *opaque, Error **errp)
2442 {
2443     uint32_t *field = opaque;
2444     uint32_t value;
2445
2446     if (!visit_type_uint32(v, name, &value, errp)) {
2447         return;
2448     }
2449
2450     *field = value;
2451 }
2452
2453 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2454                                     void *opaque, Error **errp)
2455 {
2456     uint64_t value = *(uint64_t *)opaque;
2457     visit_type_uint64(v, name, &value, errp);
2458 }
2459
2460 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2461                                     void *opaque, Error **errp)
2462 {
2463     uint64_t *field = opaque;
2464     uint64_t value;
2465
2466     if (!visit_type_uint64(v, name, &value, errp)) {
2467         return;
2468     }
2469
2470     *field = value;
2471 }
2472
2473 ObjectProperty *
2474 object_property_add_uint8_ptr(Object *obj, const char *name,
2475                               const uint8_t *v,
2476                               ObjectPropertyFlags flags)
2477 {
2478     ObjectPropertyAccessor *getter = NULL;
2479     ObjectPropertyAccessor *setter = NULL;
2480
2481     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2482         getter = property_get_uint8_ptr;
2483     }
2484
2485     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2486         setter = property_set_uint8_ptr;
2487     }
2488
2489     return object_property_add(obj, name, "uint8",
2490                                getter, setter, NULL, (void *)v);
2491 }
2492
2493 ObjectProperty *
2494 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2495                                     const uint8_t *v,
2496                                     ObjectPropertyFlags flags)
2497 {
2498     ObjectPropertyAccessor *getter = NULL;
2499     ObjectPropertyAccessor *setter = NULL;
2500
2501     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2502         getter = property_get_uint8_ptr;
2503     }
2504
2505     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2506         setter = property_set_uint8_ptr;
2507     }
2508
2509     return object_class_property_add(klass, name, "uint8",
2510                                      getter, setter, NULL, (void *)v);
2511 }
2512
2513 ObjectProperty *
2514 object_property_add_uint16_ptr(Object *obj, const char *name,
2515                                const uint16_t *v,
2516                                ObjectPropertyFlags flags)
2517 {
2518     ObjectPropertyAccessor *getter = NULL;
2519     ObjectPropertyAccessor *setter = NULL;
2520
2521     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2522         getter = property_get_uint16_ptr;
2523     }
2524
2525     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2526         setter = property_set_uint16_ptr;
2527     }
2528
2529     return object_property_add(obj, name, "uint16",
2530                                getter, setter, NULL, (void *)v);
2531 }
2532
2533 ObjectProperty *
2534 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2535                                      const uint16_t *v,
2536                                      ObjectPropertyFlags flags)
2537 {
2538     ObjectPropertyAccessor *getter = NULL;
2539     ObjectPropertyAccessor *setter = NULL;
2540
2541     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2542         getter = property_get_uint16_ptr;
2543     }
2544
2545     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2546         setter = property_set_uint16_ptr;
2547     }
2548
2549     return object_class_property_add(klass, name, "uint16",
2550                                      getter, setter, NULL, (void *)v);
2551 }
2552
2553 ObjectProperty *
2554 object_property_add_uint32_ptr(Object *obj, const char *name,
2555                                const uint32_t *v,
2556                                ObjectPropertyFlags flags)
2557 {
2558     ObjectPropertyAccessor *getter = NULL;
2559     ObjectPropertyAccessor *setter = NULL;
2560
2561     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2562         getter = property_get_uint32_ptr;
2563     }
2564
2565     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2566         setter = property_set_uint32_ptr;
2567     }
2568
2569     return object_property_add(obj, name, "uint32",
2570                                getter, setter, NULL, (void *)v);
2571 }
2572
2573 ObjectProperty *
2574 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2575                                      const uint32_t *v,
2576                                      ObjectPropertyFlags flags)
2577 {
2578     ObjectPropertyAccessor *getter = NULL;
2579     ObjectPropertyAccessor *setter = NULL;
2580
2581     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2582         getter = property_get_uint32_ptr;
2583     }
2584
2585     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2586         setter = property_set_uint32_ptr;
2587     }
2588
2589     return object_class_property_add(klass, name, "uint32",
2590                                      getter, setter, NULL, (void *)v);
2591 }
2592
2593 ObjectProperty *
2594 object_property_add_uint64_ptr(Object *obj, const char *name,
2595                                const uint64_t *v,
2596                                ObjectPropertyFlags flags)
2597 {
2598     ObjectPropertyAccessor *getter = NULL;
2599     ObjectPropertyAccessor *setter = NULL;
2600
2601     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2602         getter = property_get_uint64_ptr;
2603     }
2604
2605     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2606         setter = property_set_uint64_ptr;
2607     }
2608
2609     return object_property_add(obj, name, "uint64",
2610                                getter, setter, NULL, (void *)v);
2611 }
2612
2613 ObjectProperty *
2614 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2615                                      const uint64_t *v,
2616                                      ObjectPropertyFlags flags)
2617 {
2618     ObjectPropertyAccessor *getter = NULL;
2619     ObjectPropertyAccessor *setter = NULL;
2620
2621     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2622         getter = property_get_uint64_ptr;
2623     }
2624
2625     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2626         setter = property_set_uint64_ptr;
2627     }
2628
2629     return object_class_property_add(klass, name, "uint64",
2630                                      getter, setter, NULL, (void *)v);
2631 }
2632
2633 typedef struct {
2634     Object *target_obj;
2635     char *target_name;
2636 } AliasProperty;
2637
2638 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2639                                void *opaque, Error **errp)
2640 {
2641     AliasProperty *prop = opaque;
2642
2643     object_property_get(prop->target_obj, prop->target_name, v, errp);
2644 }
2645
2646 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2647                                void *opaque, Error **errp)
2648 {
2649     AliasProperty *prop = opaque;
2650
2651     object_property_set(prop->target_obj, prop->target_name, v, errp);
2652 }
2653
2654 static Object *property_resolve_alias(Object *obj, void *opaque,
2655                                       const char *part)
2656 {
2657     AliasProperty *prop = opaque;
2658
2659     return object_resolve_path_component(prop->target_obj, prop->target_name);
2660 }
2661
2662 static void property_release_alias(Object *obj, const char *name, void *opaque)
2663 {
2664     AliasProperty *prop = opaque;
2665
2666     g_free(prop->target_name);
2667     g_free(prop);
2668 }
2669
2670 ObjectProperty *
2671 object_property_add_alias(Object *obj, const char *name,
2672                           Object *target_obj, const char *target_name)
2673 {
2674     AliasProperty *prop;
2675     ObjectProperty *op;
2676     ObjectProperty *target_prop;
2677     g_autofree char *prop_type = NULL;
2678
2679     target_prop = object_property_find(target_obj, target_name,
2680                                        &error_abort);
2681
2682     if (object_property_is_child(target_prop)) {
2683         prop_type = g_strdup_printf("link%s",
2684                                     target_prop->type + strlen("child"));
2685     } else {
2686         prop_type = g_strdup(target_prop->type);
2687     }
2688
2689     prop = g_malloc(sizeof(*prop));
2690     prop->target_obj = target_obj;
2691     prop->target_name = g_strdup(target_name);
2692
2693     op = object_property_add(obj, name, prop_type,
2694                              property_get_alias,
2695                              property_set_alias,
2696                              property_release_alias,
2697                              prop);
2698     op->resolve = property_resolve_alias;
2699     if (target_prop->defval) {
2700         op->defval = qobject_ref(target_prop->defval);
2701     }
2702
2703     object_property_set_description(obj, op->name,
2704                                     target_prop->description);
2705     return op;
2706 }
2707
2708 void object_property_set_description(Object *obj, const char *name,
2709                                      const char *description)
2710 {
2711     ObjectProperty *op;
2712
2713     op = object_property_find(obj, name, &error_abort);
2714     g_free(op->description);
2715     op->description = g_strdup(description);
2716 }
2717
2718 void object_class_property_set_description(ObjectClass *klass,
2719                                            const char *name,
2720                                            const char *description)
2721 {
2722     ObjectProperty *op;
2723
2724     op = g_hash_table_lookup(klass->properties, name);
2725     g_free(op->description);
2726     op->description = g_strdup(description);
2727 }
2728
2729 static void object_class_init(ObjectClass *klass, void *data)
2730 {
2731     object_class_property_add_str(klass, "type", object_get_type,
2732                                   NULL);
2733 }
2734
2735 static void register_types(void)
2736 {
2737     static TypeInfo interface_info = {
2738         .name = TYPE_INTERFACE,
2739         .class_size = sizeof(InterfaceClass),
2740         .abstract = true,
2741     };
2742
2743     static TypeInfo object_info = {
2744         .name = TYPE_OBJECT,
2745         .instance_size = sizeof(Object),
2746         .class_init = object_class_init,
2747         .abstract = true,
2748     };
2749
2750     type_interface = type_register_internal(&interface_info);
2751     type_register_internal(&object_info);
2752 }
2753
2754 type_init(register_types)