qom/object.c

   1 /*
   2  * QEMU Object Model
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/qdev-core.h"
  15 #include "qapi/error.h"
  16 #include "qom/object.h"
  17 #include "qom/object_interfaces.h"
  18 #include "qemu/cutils.h"
  19 #include "qapi/visitor.h"
  20 #include "qapi/string-input-visitor.h"
  21 #include "qapi/string-output-visitor.h"
  22 #include "qapi/qobject-input-visitor.h"
  23 #include "qapi/qapi-builtin-visit.h"
  24 #include "qapi/qmp/qerror.h"
  25 #include "qapi/qmp/qjson.h"
  26 #include "trace.h"
  27
  28 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  29  * of the QOM core on QObject?  */
  30 #include "qom/qom-qobject.h"
  31 #include "qapi/qmp/qbool.h"
  32 #include "qapi/qmp/qnum.h"
  33 #include "qapi/qmp/qstring.h"
  34 #include "qemu/error-report.h"
  35
  36 #define MAX_INTERFACES 32
  37
  38 typedef struct InterfaceImpl InterfaceImpl;
  39 typedef struct TypeImpl TypeImpl;
  40
  41 struct InterfaceImpl
  42 {
  43     const char *typename;
  44 };
  45
  46 struct TypeImpl
  47 {
  48     const char *name;
  49
  50     size_t class_size;
  51
  52     size_t instance_size;
  53
  54     void (*class_init)(ObjectClass *klass, void *data);
  55     void (*class_base_init)(ObjectClass *klass, void *data);
  56
  57     void *class_data;
  58
  59     void (*instance_init)(Object *obj);
  60     void (*instance_post_init)(Object *obj);
  61     void (*instance_finalize)(Object *obj);
  62
  63     bool abstract;
  64
  65     const char *parent;
  66     TypeImpl *parent_type;
  67
  68     ObjectClass *class;
  69
  70     int num_interfaces;
  71     InterfaceImpl interfaces[MAX_INTERFACES];
  72 };
  73
  74 static Type type_interface;
  75
  76 static GHashTable *type_table_get(void)
  77 {
  78     static GHashTable *type_table;
  79
  80     if (type_table == NULL) {
  81         type_table = g_hash_table_new(g_str_hash, g_str_equal);
  82     }
  83
  84     return type_table;
  85 }
  86
  87 static bool enumerating_types;
  88
  89 static void type_table_add(TypeImpl *ti)
  90 {
  91     assert(!enumerating_types);
  92     g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
  93 }
  94
  95 static TypeImpl *type_table_lookup(const char *name)
  96 {
  97     return g_hash_table_lookup(type_table_get(), name);
  98 }
  99
 100 static TypeImpl *type_new(const TypeInfo *info)
 101 {
 102     TypeImpl *ti = g_malloc0(sizeof(*ti));
 103     int i;
 104
 105     g_assert(info->name != NULL);
 106
 107     if (type_table_lookup(info->name) != NULL) {
 108         fprintf(stderr, "Registering `%s' which already exists\n", info->name);
 109         abort();
 110     }
 111
 112     ti->name = g_strdup(info->name);
 113     ti->parent = g_strdup(info->parent);
 114
 115     ti->class_size = info->class_size;
 116     ti->instance_size = info->instance_size;
 117
 118     ti->class_init = info->class_init;
 119     ti->class_base_init = info->class_base_init;
 120     ti->class_data = info->class_data;
 121
 122     ti->instance_init = info->instance_init;
 123     ti->instance_post_init = info->instance_post_init;
 124     ti->instance_finalize = info->instance_finalize;
 125
 126     ti->abstract = info->abstract;
 127
 128     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 129         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 130     }
 131     ti->num_interfaces = i;
 132
 133     return ti;
 134 }
 135
 136 static TypeImpl *type_register_internal(const TypeInfo *info)
 137 {
 138     TypeImpl *ti;
 139     ti = type_new(info);
 140
 141     type_table_add(ti);
 142     return ti;
 143 }
 144
 145 TypeImpl *type_register(const TypeInfo *info)
 146 {
 147     assert(info->parent);
 148     return type_register_internal(info);
 149 }
 150
 151 TypeImpl *type_register_static(const TypeInfo *info)
 152 {
 153     return type_register(info);
 154 }
 155
 156 void type_register_static_array(const TypeInfo *infos, int nr_infos)
 157 {
 158     int i;
 159
 160     for (i = 0; i < nr_infos; i++) {
 161         type_register_static(&infos[i]);
 162     }
 163 }
 164
 165 static TypeImpl *type_get_by_name(const char *name)
 166 {
 167     if (name == NULL) {
 168         return NULL;
 169     }
 170
 171     return type_table_lookup(name);
 172 }
 173
 174 static TypeImpl *type_get_parent(TypeImpl *type)
 175 {
 176     if (!type->parent_type && type->parent) {
 177         type->parent_type = type_get_by_name(type->parent);
 178         if (!type->parent_type) {
 179             fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
 180                     type->name, type->parent);
 181             abort();
 182         }
 183     }
 184
 185     return type->parent_type;
 186 }
 187
 188 static bool type_has_parent(TypeImpl *type)
 189 {
 190     return (type->parent != NULL);
 191 }
 192
 193 static size_t type_class_get_size(TypeImpl *ti)
 194 {
 195     if (ti->class_size) {
 196         return ti->class_size;
 197     }
 198
 199     if (type_has_parent(ti)) {
 200         return type_class_get_size(type_get_parent(ti));
 201     }
 202
 203     return sizeof(ObjectClass);
 204 }
 205
 206 static size_t type_object_get_size(TypeImpl *ti)
 207 {
 208     if (ti->instance_size) {
 209         return ti->instance_size;
 210     }
 211
 212     if (type_has_parent(ti)) {
 213         return type_object_get_size(type_get_parent(ti));
 214     }
 215
 216     return 0;
 217 }
 218
 219 size_t object_type_get_instance_size(const char *typename)
 220 {
 221     TypeImpl *type = type_get_by_name(typename);
 222
 223     g_assert(type != NULL);
 224     return type_object_get_size(type);
 225 }
 226
 227 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 228 {
 229     assert(target_type);
 230
 231     /* Check if target_type is a direct ancestor of type */
 232     while (type) {
 233         if (type == target_type) {
 234             return true;
 235         }
 236
 237         type = type_get_parent(type);
 238     }
 239
 240     return false;
 241 }
 242
 243 static void type_initialize(TypeImpl *ti);
 244
 245 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 246                                       TypeImpl *parent_type)
 247 {
 248     InterfaceClass *new_iface;
 249     TypeInfo info = { };
 250     TypeImpl *iface_impl;
 251
 252     info.parent = parent_type->name;
 253     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 254     info.abstract = true;
 255
 256     iface_impl = type_new(&info);
 257     iface_impl->parent_type = parent_type;
 258     type_initialize(iface_impl);
 259     g_free((char *)info.name);
 260
 261     new_iface = (InterfaceClass *)iface_impl->class;
 262     new_iface->concrete_class = ti->class;
 263     new_iface->interface_type = interface_type;
 264
 265     ti->class->interfaces = g_slist_append(ti->class->interfaces,
 266                                            iface_impl->class);
 267 }
 268
 269 static void object_property_free(gpointer data)
 270 {
 271     ObjectProperty *prop = data;
 272
 273     if (prop->defval) {
 274         qobject_unref(prop->defval);
 275         prop->defval = NULL;
 276     }
 277     g_free(prop->name);
 278     g_free(prop->type);
 279     g_free(prop->description);
 280     g_free(prop);
 281 }
 282
 283 static void type_initialize(TypeImpl *ti)
 284 {
 285     TypeImpl *parent;
 286
 287     if (ti->class) {
 288         return;
 289     }
 290
 291     ti->class_size = type_class_get_size(ti);
 292     ti->instance_size = type_object_get_size(ti);
 293     /* Any type with zero instance_size is implicitly abstract.
 294      * This means interface types are all abstract.
 295      */
 296     if (ti->instance_size == 0) {
 297         ti->abstract = true;
 298     }
 299     if (type_is_ancestor(ti, type_interface)) {
 300         assert(ti->instance_size == 0);
 301         assert(ti->abstract);
 302         assert(!ti->instance_init);
 303         assert(!ti->instance_post_init);
 304         assert(!ti->instance_finalize);
 305         assert(!ti->num_interfaces);
 306     }
 307     ti->class = g_malloc0(ti->class_size);
 308
 309     parent = type_get_parent(ti);
 310     if (parent) {
 311         type_initialize(parent);
 312         GSList *e;
 313         int i;
 314
 315         g_assert(parent->class_size <= ti->class_size);
 316         g_assert(parent->instance_size <= ti->instance_size);
 317         memcpy(ti->class, parent->class, parent->class_size);
 318         ti->class->interfaces = NULL;
 319         ti->class->properties = g_hash_table_new_full(
 320             g_str_hash, g_str_equal, NULL, object_property_free);
 321
 322         for (e = parent->class->interfaces; e; e = e->next) {
 323             InterfaceClass *iface = e->data;
 324             ObjectClass *klass = OBJECT_CLASS(iface);
 325
 326             type_initialize_interface(ti, iface->interface_type, klass->type);
 327         }
 328
 329         for (i = 0; i < ti->num_interfaces; i++) {
 330             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 331             if (!t) {
 332                 error_report("missing interface '%s' for object '%s'",
 333                              ti->interfaces[i].typename, parent->name);
 334                 abort();
 335             }
 336             for (e = ti->class->interfaces; e; e = e->next) {
 337                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 338
 339                 if (type_is_ancestor(target_type, t)) {
 340                     break;
 341                 }
 342             }
 343
 344             if (e) {
 345                 continue;
 346             }
 347
 348             type_initialize_interface(ti, t, t);
 349         }
 350     } else {
 351         ti->class->properties = g_hash_table_new_full(
 352             g_str_hash, g_str_equal, NULL, object_property_free);
 353     }
 354
 355     ti->class->type = ti;
 356
 357     while (parent) {
 358         if (parent->class_base_init) {
 359             parent->class_base_init(ti->class, ti->class_data);
 360         }
 361         parent = type_get_parent(parent);
 362     }
 363
 364     if (ti->class_init) {
 365         ti->class_init(ti->class, ti->class_data);
 366     }
 367 }
 368
 369 static void object_init_with_type(Object *obj, TypeImpl *ti)
 370 {
 371     if (type_has_parent(ti)) {
 372         object_init_with_type(obj, type_get_parent(ti));
 373     }
 374
 375     if (ti->instance_init) {
 376         ti->instance_init(obj);
 377     }
 378 }
 379
 380 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 381 {
 382     if (ti->instance_post_init) {
 383         ti->instance_post_init(obj);
 384     }
 385
 386     if (type_has_parent(ti)) {
 387         object_post_init_with_type(obj, type_get_parent(ti));
 388     }
 389 }
 390
 391 void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp)
 392 {
 393     int i;
 394
 395     if (!props) {
 396         return;
 397     }
 398
 399     for (i = 0; i < props->len; i++) {
 400         GlobalProperty *p = g_ptr_array_index(props, i);
 401         Error *err = NULL;
 402
 403         if (object_dynamic_cast(obj, p->driver) == NULL) {
 404             continue;
 405         }
 406         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 407             continue;
 408         }
 409         p->used = true;
 410         object_property_parse(obj, p->value, p->property, &err);
 411         if (err != NULL) {
 412             error_prepend(&err, "can't apply global %s.%s=%s: ",
 413                           p->driver, p->property, p->value);
 414             /*
 415              * If errp != NULL, propagate error and return.
 416              * If errp == NULL, report a warning, but keep going
 417              * with the remaining globals.
 418              */
 419             if (errp) {
 420                 error_propagate(errp, err);
 421                 return;
 422             } else {
 423                 warn_report_err(err);
 424             }
 425         }
 426     }
 427 }
 428
 429 /*
 430  * Global property defaults
 431  * Slot 0: accelerator's global property defaults
 432  * Slot 1: machine's global property defaults
 433  * Slot 2: global properties from legacy command line option
 434  * Each is a GPtrArray of of GlobalProperty.
 435  * Applied in order, later entries override earlier ones.
 436  */
 437 static GPtrArray *object_compat_props[3];
 438
 439 /*
 440  * Retrieve @GPtrArray for global property defined with options
 441  * other than "-global".  These are generally used for syntactic
 442  * sugar and legacy command line options.
 443  */
 444 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 445 {
 446     GlobalProperty *g;
 447     if (!object_compat_props[2]) {
 448         object_compat_props[2] = g_ptr_array_new();
 449     }
 450     g = g_new0(GlobalProperty, 1);
 451     g->driver = g_strdup(driver);
 452     g->property = g_strdup(prop);
 453     g->value = g_strdup(value);
 454     g_ptr_array_add(object_compat_props[2], g);
 455 }
 456
 457 /*
 458  * Set machine's global property defaults to @compat_props.
 459  * May be called at most once.
 460  */
 461 void object_set_machine_compat_props(GPtrArray *compat_props)
 462 {
 463     assert(!object_compat_props[1]);
 464     object_compat_props[1] = compat_props;
 465 }
 466
 467 /*
 468  * Set accelerator's global property defaults to @compat_props.
 469  * May be called at most once.
 470  */
 471 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 472 {
 473     assert(!object_compat_props[0]);
 474     object_compat_props[0] = compat_props;
 475 }
 476
 477 void object_apply_compat_props(Object *obj)
 478 {
 479     int i;
 480
 481     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 482         object_apply_global_props(obj, object_compat_props[i],
 483                                   i == 2 ? &error_fatal : &error_abort);
 484     }
 485 }
 486
 487 static void object_class_property_init_all(Object *obj)
 488 {
 489     ObjectPropertyIterator iter;
 490     ObjectProperty *prop;
 491
 492     object_class_property_iter_init(&iter, object_get_class(obj));
 493     while ((prop = object_property_iter_next(&iter))) {
 494         if (prop->init) {
 495             prop->init(obj, prop);
 496         }
 497     }
 498 }
 499
 500 static void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 501 {
 502     Object *obj = data;
 503
 504     type_initialize(type);
 505
 506     g_assert(type->instance_size >= sizeof(Object));
 507     g_assert(type->abstract == false);
 508     g_assert(size >= type->instance_size);
 509
 510     memset(obj, 0, type->instance_size);
 511     obj->class = type->class;
 512     object_ref(obj);
 513     object_class_property_init_all(obj);
 514     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 515                                             NULL, object_property_free);
 516     object_init_with_type(obj, type);
 517     object_post_init_with_type(obj, type);
 518 }
 519
 520 void object_initialize(void *data, size_t size, const char *typename)
 521 {
 522     TypeImpl *type = type_get_by_name(typename);
 523
 524     if (!type) {
 525         error_report("missing object type '%s'", typename);
 526         abort();
 527     }
 528
 529     object_initialize_with_type(data, size, type);
 530 }
 531
 532 void object_initialize_child(Object *parentobj, const char *propname,
 533                              void *childobj, size_t size, const char *type,
 534                              Error **errp, ...)
 535 {
 536     va_list vargs;
 537
 538     va_start(vargs, errp);
 539     object_initialize_childv(parentobj, propname, childobj, size, type, errp,
 540                              vargs);
 541     va_end(vargs);
 542 }
 543
 544 void object_initialize_childv(Object *parentobj, const char *propname,
 545                               void *childobj, size_t size, const char *type,
 546                               Error **errp, va_list vargs)
 547 {
 548     Error *local_err = NULL;
 549     Object *obj;
 550     UserCreatable *uc;
 551
 552     object_initialize(childobj, size, type);
 553     obj = OBJECT(childobj);
 554
 555     object_set_propv(obj, &local_err, vargs);
 556     if (local_err) {
 557         goto out;
 558     }
 559
 560     object_property_add_child(parentobj, propname, obj);
 561
 562     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 563     if (uc) {
 564         user_creatable_complete(uc, &local_err);
 565         if (local_err) {
 566             object_unparent(obj);
 567             goto out;
 568         }
 569     }
 570
 571 out:
 572     /*
 573      * We want @obj's reference to be 1 on success, 0 on failure.
 574      * On success, it's 2: one taken by object_initialize(), and one
 575      * by object_property_add_child().
 576      * On failure in object_initialize() or earlier, it's 1.
 577      * On failure afterwards, it's also 1: object_unparent() releases
 578      * the reference taken by object_property_add_child().
 579      */
 580     object_unref(obj);
 581
 582     error_propagate(errp, local_err);
 583 }
 584
 585 static inline bool object_property_is_child(ObjectProperty *prop)
 586 {
 587     return strstart(prop->type, "child<", NULL);
 588 }
 589
 590 static void object_property_del_all(Object *obj)
 591 {
 592     g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
 593     ObjectProperty *prop;
 594     ObjectPropertyIterator iter;
 595     bool released;
 596
 597     do {
 598         released = false;
 599         object_property_iter_init(&iter, obj);
 600         while ((prop = object_property_iter_next(&iter)) != NULL) {
 601             if (g_hash_table_add(done, prop)) {
 602                 if (prop->release) {
 603                     prop->release(obj, prop->name, prop->opaque);
 604                     released = true;
 605                     break;
 606                 }
 607             }
 608         }
 609     } while (released);
 610
 611     g_hash_table_unref(obj->properties);
 612 }
 613
 614 static void object_property_del_child(Object *obj, Object *child)
 615 {
 616     ObjectProperty *prop;
 617     GHashTableIter iter;
 618     gpointer key, value;
 619
 620     g_hash_table_iter_init(&iter, obj->properties);
 621     while (g_hash_table_iter_next(&iter, &key, &value)) {
 622         prop = value;
 623         if (object_property_is_child(prop) && prop->opaque == child) {
 624             if (prop->release) {
 625                 prop->release(obj, prop->name, prop->opaque);
 626                 prop->release = NULL;
 627             }
 628             break;
 629         }
 630     }
 631     g_hash_table_iter_init(&iter, obj->properties);
 632     while (g_hash_table_iter_next(&iter, &key, &value)) {
 633         prop = value;
 634         if (object_property_is_child(prop) && prop->opaque == child) {
 635             g_hash_table_iter_remove(&iter);
 636             break;
 637         }
 638     }
 639 }
 640
 641 void object_unparent(Object *obj)
 642 {
 643     if (obj->parent) {
 644         object_property_del_child(obj->parent, obj);
 645     }
 646 }
 647
 648 static void object_deinit(Object *obj, TypeImpl *type)
 649 {
 650     if (type->instance_finalize) {
 651         type->instance_finalize(obj);
 652     }
 653
 654     if (type_has_parent(type)) {
 655         object_deinit(obj, type_get_parent(type));
 656     }
 657 }
 658
 659 static void object_finalize(void *data)
 660 {
 661     Object *obj = data;
 662     TypeImpl *ti = obj->class->type;
 663
 664     object_property_del_all(obj);
 665     object_deinit(obj, ti);
 666
 667     g_assert(obj->ref == 0);
 668     if (obj->free) {
 669         obj->free(obj);
 670     }
 671 }
 672
 673 static Object *object_new_with_type(Type type)
 674 {
 675     Object *obj;
 676
 677     g_assert(type != NULL);
 678     type_initialize(type);
 679
 680     obj = g_malloc(type->instance_size);
 681     object_initialize_with_type(obj, type->instance_size, type);
 682     obj->free = g_free;
 683
 684     return obj;
 685 }
 686
 687 Object *object_new_with_class(ObjectClass *klass)
 688 {
 689     return object_new_with_type(klass->type);
 690 }
 691
 692 Object *object_new(const char *typename)
 693 {
 694     TypeImpl *ti = type_get_by_name(typename);
 695
 696     return object_new_with_type(ti);
 697 }
 698
 699
 700 Object *object_new_with_props(const char *typename,
 701                               Object *parent,
 702                               const char *id,
 703                               Error **errp,
 704                               ...)
 705 {
 706     va_list vargs;
 707     Object *obj;
 708
 709     va_start(vargs, errp);
 710     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 711     va_end(vargs);
 712
 713     return obj;
 714 }
 715
 716
 717 Object *object_new_with_propv(const char *typename,
 718                               Object *parent,
 719                               const char *id,
 720                               Error **errp,
 721                               va_list vargs)
 722 {
 723     Object *obj;
 724     ObjectClass *klass;
 725     Error *local_err = NULL;
 726     UserCreatable *uc;
 727
 728     klass = object_class_by_name(typename);
 729     if (!klass) {
 730         error_setg(errp, "invalid object type: %s", typename);
 731         return NULL;
 732     }
 733
 734     if (object_class_is_abstract(klass)) {
 735         error_setg(errp, "object type '%s' is abstract", typename);
 736         return NULL;
 737     }
 738     obj = object_new_with_type(klass->type);
 739
 740     if (object_set_propv(obj, &local_err, vargs) < 0) {
 741         goto error;
 742     }
 743
 744     if (id != NULL) {
 745         object_property_add_child(parent, id, obj);
 746     }
 747
 748     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 749     if (uc) {
 750         user_creatable_complete(uc, &local_err);
 751         if (local_err) {
 752             if (id != NULL) {
 753                 object_unparent(obj);
 754             }
 755             goto error;
 756         }
 757     }
 758
 759     object_unref(obj);
 760     return obj;
 761
 762  error:
 763     error_propagate(errp, local_err);
 764     object_unref(obj);
 765     return NULL;
 766 }
 767
 768
 769 int object_set_props(Object *obj,
 770                      Error **errp,
 771                      ...)
 772 {
 773     va_list vargs;
 774     int ret;
 775
 776     va_start(vargs, errp);
 777     ret = object_set_propv(obj, errp, vargs);
 778     va_end(vargs);
 779
 780     return ret;
 781 }
 782
 783
 784 int object_set_propv(Object *obj,
 785                      Error **errp,
 786                      va_list vargs)
 787 {
 788     const char *propname;
 789     Error *local_err = NULL;
 790
 791     propname = va_arg(vargs, char *);
 792     while (propname != NULL) {
 793         const char *value = va_arg(vargs, char *);
 794
 795         g_assert(value != NULL);
 796         object_property_parse(obj, value, propname, &local_err);
 797         if (local_err) {
 798             error_propagate(errp, local_err);
 799             return -1;
 800         }
 801         propname = va_arg(vargs, char *);
 802     }
 803
 804     return 0;
 805 }
 806
 807
 808 Object *object_dynamic_cast(Object *obj, const char *typename)
 809 {
 810     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 811         return obj;
 812     }
 813
 814     return NULL;
 815 }
 816
 817 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 818                                    const char *file, int line, const char *func)
 819 {
 820     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 821                                      typename, file, line, func);
 822
 823 #ifdef CONFIG_QOM_CAST_DEBUG
 824     int i;
 825     Object *inst;
 826
 827     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 828         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 829             goto out;
 830         }
 831     }
 832
 833     inst = object_dynamic_cast(obj, typename);
 834
 835     if (!inst && obj) {
 836         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 837                 file, line, func, obj, typename);
 838         abort();
 839     }
 840
 841     assert(obj == inst);
 842
 843     if (obj && obj == inst) {
 844         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 845             atomic_set(&obj->class->object_cast_cache[i - 1],
 846                        atomic_read(&obj->class->object_cast_cache[i]));
 847         }
 848         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 849     }
 850
 851 out:
 852 #endif
 853     return obj;
 854 }
 855
 856 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 857                                        const char *typename)
 858 {
 859     ObjectClass *ret = NULL;
 860     TypeImpl *target_type;
 861     TypeImpl *type;
 862
 863     if (!class) {
 864         return NULL;
 865     }
 866
 867     /* A simple fast path that can trigger a lot for leaf classes.  */
 868     type = class->type;
 869     if (type->name == typename) {
 870         return class;
 871     }
 872
 873     target_type = type_get_by_name(typename);
 874     if (!target_type) {
 875         /* target class type unknown, so fail the cast */
 876         return NULL;
 877     }
 878
 879     if (type->class->interfaces &&
 880             type_is_ancestor(target_type, type_interface)) {
 881         int found = 0;
 882         GSList *i;
 883
 884         for (i = class->interfaces; i; i = i->next) {
 885             ObjectClass *target_class = i->data;
 886
 887             if (type_is_ancestor(target_class->type, target_type)) {
 888                 ret = target_class;
 889                 found++;
 890             }
 891          }
 892
 893         /* The match was ambiguous, don't allow a cast */
 894         if (found > 1) {
 895             ret = NULL;
 896         }
 897     } else if (type_is_ancestor(type, target_type)) {
 898         ret = class;
 899     }
 900
 901     return ret;
 902 }
 903
 904 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 905                                               const char *typename,
 906                                               const char *file, int line,
 907                                               const char *func)
 908 {
 909     ObjectClass *ret;
 910
 911     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 912                                            typename, file, line, func);
 913
 914 #ifdef CONFIG_QOM_CAST_DEBUG
 915     int i;
 916
 917     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 918         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 919             ret = class;
 920             goto out;
 921         }
 922     }
 923 #else
 924     if (!class || !class->interfaces) {
 925         return class;
 926     }
 927 #endif
 928
 929     ret = object_class_dynamic_cast(class, typename);
 930     if (!ret && class) {
 931         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 932                 file, line, func, class, typename);
 933         abort();
 934     }
 935
 936 #ifdef CONFIG_QOM_CAST_DEBUG
 937     if (class && ret == class) {
 938         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 939             atomic_set(&class->class_cast_cache[i - 1],
 940                        atomic_read(&class->class_cast_cache[i]));
 941         }
 942         atomic_set(&class->class_cast_cache[i - 1], typename);
 943     }
 944 out:
 945 #endif
 946     return ret;
 947 }
 948
 949 const char *object_get_typename(const Object *obj)
 950 {
 951     return obj->class->type->name;
 952 }
 953
 954 ObjectClass *object_get_class(Object *obj)
 955 {
 956     return obj->class;
 957 }
 958
 959 bool object_class_is_abstract(ObjectClass *klass)
 960 {
 961     return klass->type->abstract;
 962 }
 963
 964 const char *object_class_get_name(ObjectClass *klass)
 965 {
 966     return klass->type->name;
 967 }
 968
 969 ObjectClass *object_class_by_name(const char *typename)
 970 {
 971     TypeImpl *type = type_get_by_name(typename);
 972
 973     if (!type) {
 974         return NULL;
 975     }
 976
 977     type_initialize(type);
 978
 979     return type->class;
 980 }
 981
 982 ObjectClass *object_class_get_parent(ObjectClass *class)
 983 {
 984     TypeImpl *type = type_get_parent(class->type);
 985
 986     if (!type) {
 987         return NULL;
 988     }
 989
 990     type_initialize(type);
 991
 992     return type->class;
 993 }
 994
 995 typedef struct OCFData
 996 {
 997     void (*fn)(ObjectClass *klass, void *opaque);
 998     const char *implements_type;
 999     bool include_abstract;
1000     void *opaque;
1001 } OCFData;
1002
1003 static void object_class_foreach_tramp(gpointer key, gpointer value,
1004                                        gpointer opaque)
1005 {
1006     OCFData *data = opaque;
1007     TypeImpl *type = value;
1008     ObjectClass *k;
1009
1010     type_initialize(type);
1011     k = type->class;
1012
1013     if (!data->include_abstract && type->abstract) {
1014         return;
1015     }
1016
1017     if (data->implements_type &&
1018         !object_class_dynamic_cast(k, data->implements_type)) {
1019         return;
1020     }
1021
1022     data->fn(k, data->opaque);
1023 }
1024
1025 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1026                           const char *implements_type, bool include_abstract,
1027                           void *opaque)
1028 {
1029     OCFData data = { fn, implements_type, include_abstract, opaque };
1030
1031     enumerating_types = true;
1032     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1033     enumerating_types = false;
1034 }
1035
1036 static int do_object_child_foreach(Object *obj,
1037                                    int (*fn)(Object *child, void *opaque),
1038                                    void *opaque, bool recurse)
1039 {
1040     GHashTableIter iter;
1041     ObjectProperty *prop;
1042     int ret = 0;
1043
1044     g_hash_table_iter_init(&iter, obj->properties);
1045     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1046         if (object_property_is_child(prop)) {
1047             Object *child = prop->opaque;
1048
1049             ret = fn(child, opaque);
1050             if (ret != 0) {
1051                 break;
1052             }
1053             if (recurse) {
1054                 do_object_child_foreach(child, fn, opaque, true);
1055             }
1056         }
1057     }
1058     return ret;
1059 }
1060
1061 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1062                          void *opaque)
1063 {
1064     return do_object_child_foreach(obj, fn, opaque, false);
1065 }
1066
1067 int object_child_foreach_recursive(Object *obj,
1068                                    int (*fn)(Object *child, void *opaque),
1069                                    void *opaque)
1070 {
1071     return do_object_child_foreach(obj, fn, opaque, true);
1072 }
1073
1074 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1075 {
1076     GSList **list = opaque;
1077
1078     *list = g_slist_prepend(*list, klass);
1079 }
1080
1081 GSList *object_class_get_list(const char *implements_type,
1082                               bool include_abstract)
1083 {
1084     GSList *list = NULL;
1085
1086     object_class_foreach(object_class_get_list_tramp,
1087                          implements_type, include_abstract, &list);
1088     return list;
1089 }
1090
1091 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1092 {
1093     return strcasecmp(object_class_get_name((ObjectClass *)a),
1094                       object_class_get_name((ObjectClass *)b));
1095 }
1096
1097 GSList *object_class_get_list_sorted(const char *implements_type,
1098                                      bool include_abstract)
1099 {
1100     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1101                         object_class_cmp);
1102 }
1103
1104 Object *object_ref(Object *obj)
1105 {
1106     if (!obj) {
1107         return NULL;
1108     }
1109     atomic_inc(&obj->ref);
1110     return obj;
1111 }
1112
1113 void object_unref(Object *obj)
1114 {
1115     if (!obj) {
1116         return;
1117     }
1118     g_assert(obj->ref > 0);
1119
1120     /* parent always holds a reference to its children */
1121     if (atomic_fetch_dec(&obj->ref) == 1) {
1122         object_finalize(obj);
1123     }
1124 }
1125
1126 static ObjectProperty *
1127 object_property_try_add(Object *obj, const char *name, const char *type,
1128                         ObjectPropertyAccessor *get,
1129                         ObjectPropertyAccessor *set,
1130                         ObjectPropertyRelease *release,
1131                         void *opaque, Error **errp)
1132 {
1133     ObjectProperty *prop;
1134     size_t name_len = strlen(name);
1135
1136     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1137         int i;
1138         ObjectProperty *ret;
1139         char *name_no_array = g_strdup(name);
1140
1141         name_no_array[name_len - 3] = '\0';
1142         for (i = 0; ; ++i) {
1143             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1144
1145             ret = object_property_try_add(obj, full_name, type, get, set,
1146                                           release, opaque, NULL);
1147             g_free(full_name);
1148             if (ret) {
1149                 break;
1150             }
1151         }
1152         g_free(name_no_array);
1153         return ret;
1154     }
1155
1156     if (object_property_find(obj, name, NULL) != NULL) {
1157         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1158                    name, object_get_typename(obj));
1159         return NULL;
1160     }
1161
1162     prop = g_malloc0(sizeof(*prop));
1163
1164     prop->name = g_strdup(name);
1165     prop->type = g_strdup(type);
1166
1167     prop->get = get;
1168     prop->set = set;
1169     prop->release = release;
1170     prop->opaque = opaque;
1171
1172     g_hash_table_insert(obj->properties, prop->name, prop);
1173     return prop;
1174 }
1175
1176 ObjectProperty *
1177 object_property_add(Object *obj, const char *name, const char *type,
1178                     ObjectPropertyAccessor *get,
1179                     ObjectPropertyAccessor *set,
1180                     ObjectPropertyRelease *release,
1181                     void *opaque)
1182 {
1183     return object_property_try_add(obj, name, type, get, set, release,
1184                                    opaque, &error_abort);
1185 }
1186
1187 ObjectProperty *
1188 object_class_property_add(ObjectClass *klass,
1189                           const char *name,
1190                           const char *type,
1191                           ObjectPropertyAccessor *get,
1192                           ObjectPropertyAccessor *set,
1193                           ObjectPropertyRelease *release,
1194                           void *opaque)
1195 {
1196     ObjectProperty *prop;
1197
1198     assert(!object_class_property_find(klass, name, NULL));
1199
1200     prop = g_malloc0(sizeof(*prop));
1201
1202     prop->name = g_strdup(name);
1203     prop->type = g_strdup(type);
1204
1205     prop->get = get;
1206     prop->set = set;
1207     prop->release = release;
1208     prop->opaque = opaque;
1209
1210     g_hash_table_insert(klass->properties, prop->name, prop);
1211
1212     return prop;
1213 }
1214
1215 ObjectProperty *object_property_find(Object *obj, const char *name,
1216                                      Error **errp)
1217 {
1218     ObjectProperty *prop;
1219     ObjectClass *klass = object_get_class(obj);
1220
1221     prop = object_class_property_find(klass, name, NULL);
1222     if (prop) {
1223         return prop;
1224     }
1225
1226     prop = g_hash_table_lookup(obj->properties, name);
1227     if (prop) {
1228         return prop;
1229     }
1230
1231     error_setg(errp, "Property '.%s' not found", name);
1232     return NULL;
1233 }
1234
1235 void object_property_iter_init(ObjectPropertyIterator *iter,
1236                                Object *obj)
1237 {
1238     g_hash_table_iter_init(&iter->iter, obj->properties);
1239     iter->nextclass = object_get_class(obj);
1240 }
1241
1242 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1243 {
1244     gpointer key, val;
1245     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1246         if (!iter->nextclass) {
1247             return NULL;
1248         }
1249         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1250         iter->nextclass = object_class_get_parent(iter->nextclass);
1251     }
1252     return val;
1253 }
1254
1255 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1256                                      ObjectClass *klass)
1257 {
1258     g_hash_table_iter_init(&iter->iter, klass->properties);
1259     iter->nextclass = object_class_get_parent(klass);
1260 }
1261
1262 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1263                                            Error **errp)
1264 {
1265     ObjectProperty *prop;
1266     ObjectClass *parent_klass;
1267
1268     parent_klass = object_class_get_parent(klass);
1269     if (parent_klass) {
1270         prop = object_class_property_find(parent_klass, name, NULL);
1271         if (prop) {
1272             return prop;
1273         }
1274     }
1275
1276     prop = g_hash_table_lookup(klass->properties, name);
1277     if (!prop) {
1278         error_setg(errp, "Property '.%s' not found", name);
1279     }
1280     return prop;
1281 }
1282
1283 void object_property_del(Object *obj, const char *name)
1284 {
1285     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1286
1287     if (prop->release) {
1288         prop->release(obj, name, prop->opaque);
1289     }
1290     g_hash_table_remove(obj->properties, name);
1291 }
1292
1293 void object_property_get(Object *obj, Visitor *v, const char *name,
1294                          Error **errp)
1295 {
1296     ObjectProperty *prop = object_property_find(obj, name, errp);
1297     if (prop == NULL) {
1298         return;
1299     }
1300
1301     if (!prop->get) {
1302         error_setg(errp, QERR_PERMISSION_DENIED);
1303     } else {
1304         prop->get(obj, v, name, prop->opaque, errp);
1305     }
1306 }
1307
1308 void object_property_set(Object *obj, Visitor *v, const char *name,
1309                          Error **errp)
1310 {
1311     ObjectProperty *prop = object_property_find(obj, name, errp);
1312     if (prop == NULL) {
1313         return;
1314     }
1315
1316     if (!prop->set) {
1317         error_setg(errp, QERR_PERMISSION_DENIED);
1318     } else {
1319         prop->set(obj, v, name, prop->opaque, errp);
1320     }
1321 }
1322
1323 void object_property_set_str(Object *obj, const char *value,
1324                              const char *name, Error **errp)
1325 {
1326     QString *qstr = qstring_from_str(value);
1327     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1328
1329     qobject_unref(qstr);
1330 }
1331
1332 char *object_property_get_str(Object *obj, const char *name,
1333                               Error **errp)
1334 {
1335     QObject *ret = object_property_get_qobject(obj, name, errp);
1336     char *retval;
1337
1338     if (!ret) {
1339         return NULL;
1340     }
1341
1342     retval = g_strdup(qobject_get_try_str(ret));
1343     if (!retval) {
1344         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1345     }
1346
1347     qobject_unref(ret);
1348     return retval;
1349 }
1350
1351 void object_property_set_link(Object *obj, Object *value,
1352                               const char *name, Error **errp)
1353 {
1354     if (value) {
1355         char *path = object_get_canonical_path(value);
1356         object_property_set_str(obj, path, name, errp);
1357         g_free(path);
1358     } else {
1359         object_property_set_str(obj, "", name, errp);
1360     }
1361 }
1362
1363 Object *object_property_get_link(Object *obj, const char *name,
1364                                  Error **errp)
1365 {
1366     char *str = object_property_get_str(obj, name, errp);
1367     Object *target = NULL;
1368
1369     if (str && *str) {
1370         target = object_resolve_path(str, NULL);
1371         if (!target) {
1372             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1373                       "Device '%s' not found", str);
1374         }
1375     }
1376
1377     g_free(str);
1378     return target;
1379 }
1380
1381 void object_property_set_bool(Object *obj, bool value,
1382                               const char *name, Error **errp)
1383 {
1384     QBool *qbool = qbool_from_bool(value);
1385     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1386
1387     qobject_unref(qbool);
1388 }
1389
1390 bool object_property_get_bool(Object *obj, const char *name,
1391                               Error **errp)
1392 {
1393     QObject *ret = object_property_get_qobject(obj, name, errp);
1394     QBool *qbool;
1395     bool retval;
1396
1397     if (!ret) {
1398         return false;
1399     }
1400     qbool = qobject_to(QBool, ret);
1401     if (!qbool) {
1402         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1403         retval = false;
1404     } else {
1405         retval = qbool_get_bool(qbool);
1406     }
1407
1408     qobject_unref(ret);
1409     return retval;
1410 }
1411
1412 void object_property_set_int(Object *obj, int64_t value,
1413                              const char *name, Error **errp)
1414 {
1415     QNum *qnum = qnum_from_int(value);
1416     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1417
1418     qobject_unref(qnum);
1419 }
1420
1421 int64_t object_property_get_int(Object *obj, const char *name,
1422                                 Error **errp)
1423 {
1424     QObject *ret = object_property_get_qobject(obj, name, errp);
1425     QNum *qnum;
1426     int64_t retval;
1427
1428     if (!ret) {
1429         return -1;
1430     }
1431
1432     qnum = qobject_to(QNum, ret);
1433     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1434         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1435         retval = -1;
1436     }
1437
1438     qobject_unref(ret);
1439     return retval;
1440 }
1441
1442 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1443 {
1444     Visitor *v = qobject_input_visitor_new(prop->defval);
1445
1446     assert(prop->set != NULL);
1447     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1448
1449     visit_free(v);
1450 }
1451
1452 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1453 {
1454     assert(!prop->defval);
1455     assert(!prop->init);
1456
1457     prop->defval = defval;
1458     prop->init = object_property_init_defval;
1459 }
1460
1461 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1462 {
1463     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1464 }
1465
1466 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1467 {
1468     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1469 }
1470
1471 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1472 {
1473     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1474 }
1475
1476 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1477 {
1478     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1479 }
1480
1481 void object_property_set_uint(Object *obj, uint64_t value,
1482                               const char *name, Error **errp)
1483 {
1484     QNum *qnum = qnum_from_uint(value);
1485
1486     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1487     qobject_unref(qnum);
1488 }
1489
1490 uint64_t object_property_get_uint(Object *obj, const char *name,
1491                                   Error **errp)
1492 {
1493     QObject *ret = object_property_get_qobject(obj, name, errp);
1494     QNum *qnum;
1495     uint64_t retval;
1496
1497     if (!ret) {
1498         return 0;
1499     }
1500     qnum = qobject_to(QNum, ret);
1501     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1502         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1503         retval = 0;
1504     }
1505
1506     qobject_unref(ret);
1507     return retval;
1508 }
1509
1510 typedef struct EnumProperty {
1511     const QEnumLookup *lookup;
1512     int (*get)(Object *, Error **);
1513     void (*set)(Object *, int, Error **);
1514 } EnumProperty;
1515
1516 int object_property_get_enum(Object *obj, const char *name,
1517                              const char *typename, Error **errp)
1518 {
1519     char *str;
1520     int ret;
1521     ObjectProperty *prop = object_property_find(obj, name, errp);
1522     EnumProperty *enumprop;
1523
1524     if (prop == NULL) {
1525         return 0;
1526     }
1527
1528     if (!g_str_equal(prop->type, typename)) {
1529         error_setg(errp, "Property %s on %s is not '%s' enum type",
1530                    name, object_class_get_name(
1531                        object_get_class(obj)), typename);
1532         return 0;
1533     }
1534
1535     enumprop = prop->opaque;
1536
1537     str = object_property_get_str(obj, name, errp);
1538     if (!str) {
1539         return 0;
1540     }
1541
1542     ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1543     g_free(str);
1544
1545     return ret;
1546 }
1547
1548 void object_property_parse(Object *obj, const char *string,
1549                            const char *name, Error **errp)
1550 {
1551     Visitor *v = string_input_visitor_new(string);
1552     object_property_set(obj, v, name, errp);
1553     visit_free(v);
1554 }
1555
1556 char *object_property_print(Object *obj, const char *name, bool human,
1557                             Error **errp)
1558 {
1559     Visitor *v;
1560     char *string = NULL;
1561     Error *local_err = NULL;
1562
1563     v = string_output_visitor_new(human, &string);
1564     object_property_get(obj, v, name, &local_err);
1565     if (local_err) {
1566         error_propagate(errp, local_err);
1567         goto out;
1568     }
1569
1570     visit_complete(v, &string);
1571
1572 out:
1573     visit_free(v);
1574     return string;
1575 }
1576
1577 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1578 {
1579     ObjectProperty *prop = object_property_find(obj, name, errp);
1580     if (prop == NULL) {
1581         return NULL;
1582     }
1583
1584     return prop->type;
1585 }
1586
1587 Object *object_get_root(void)
1588 {
1589     static Object *root;
1590
1591     if (!root) {
1592         root = object_new("container");
1593     }
1594
1595     return root;
1596 }
1597
1598 Object *object_get_objects_root(void)
1599 {
1600     return container_get(object_get_root(), "/objects");
1601 }
1602
1603 Object *object_get_internal_root(void)
1604 {
1605     static Object *internal_root;
1606
1607     if (!internal_root) {
1608         internal_root = object_new("container");
1609     }
1610
1611     return internal_root;
1612 }
1613
1614 static void object_get_child_property(Object *obj, Visitor *v,
1615                                       const char *name, void *opaque,
1616                                       Error **errp)
1617 {
1618     Object *child = opaque;
1619     char *path;
1620
1621     path = object_get_canonical_path(child);
1622     visit_type_str(v, name, &path, errp);
1623     g_free(path);
1624 }
1625
1626 static Object *object_resolve_child_property(Object *parent, void *opaque,
1627                                              const char *part)
1628 {
1629     return opaque;
1630 }
1631
1632 static void object_finalize_child_property(Object *obj, const char *name,
1633                                            void *opaque)
1634 {
1635     Object *child = opaque;
1636
1637     if (child->class->unparent) {
1638         (child->class->unparent)(child);
1639     }
1640     child->parent = NULL;
1641     object_unref(child);
1642 }
1643
1644 ObjectProperty *
1645 object_property_add_child(Object *obj, const char *name,
1646                           Object *child)
1647 {
1648     g_autofree char *type = NULL;
1649     ObjectProperty *op;
1650
1651     assert(!child->parent);
1652
1653     type = g_strdup_printf("child<%s>", object_get_typename(child));
1654
1655     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1656                              object_finalize_child_property, child);
1657     op->resolve = object_resolve_child_property;
1658     object_ref(child);
1659     child->parent = obj;
1660     return op;
1661 }
1662
1663 void object_property_allow_set_link(const Object *obj, const char *name,
1664                                     Object *val, Error **errp)
1665 {
1666     /* Allow the link to be set, always */
1667 }
1668
1669 typedef struct {
1670     union {
1671         Object **targetp;
1672         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1673         ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1674     };
1675     void (*check)(const Object *, const char *, Object *, Error **);
1676     ObjectPropertyLinkFlags flags;
1677 } LinkProperty;
1678
1679 static Object **
1680 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1681 {
1682     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1683         return &lprop->target;
1684     } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1685         return (void *)obj + lprop->offset;
1686     } else {
1687         return lprop->targetp;
1688     }
1689 }
1690
1691 static void object_get_link_property(Object *obj, Visitor *v,
1692                                      const char *name, void *opaque,
1693                                      Error **errp)
1694 {
1695     LinkProperty *lprop = opaque;
1696     Object **targetp = object_link_get_targetp(obj, lprop);
1697     char *path;
1698
1699     if (*targetp) {
1700         path = object_get_canonical_path(*targetp);
1701         visit_type_str(v, name, &path, errp);
1702         g_free(path);
1703     } else {
1704         path = (char *)"";
1705         visit_type_str(v, name, &path, errp);
1706     }
1707 }
1708
1709 /*
1710  * object_resolve_link:
1711  *
1712  * Lookup an object and ensure its type matches the link property type.  This
1713  * is similar to object_resolve_path() except type verification against the
1714  * link property is performed.
1715  *
1716  * Returns: The matched object or NULL on path lookup failures.
1717  */
1718 static Object *object_resolve_link(Object *obj, const char *name,
1719                                    const char *path, Error **errp)
1720 {
1721     const char *type;
1722     char *target_type;
1723     bool ambiguous = false;
1724     Object *target;
1725
1726     /* Go from link<FOO> to FOO.  */
1727     type = object_property_get_type(obj, name, NULL);
1728     target_type = g_strndup(&type[5], strlen(type) - 6);
1729     target = object_resolve_path_type(path, target_type, &ambiguous);
1730
1731     if (ambiguous) {
1732         error_setg(errp, "Path '%s' does not uniquely identify an object",
1733                    path);
1734     } else if (!target) {
1735         target = object_resolve_path(path, &ambiguous);
1736         if (target || ambiguous) {
1737             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1738         } else {
1739             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1740                       "Device '%s' not found", path);
1741         }
1742         target = NULL;
1743     }
1744     g_free(target_type);
1745
1746     return target;
1747 }
1748
1749 static void object_set_link_property(Object *obj, Visitor *v,
1750                                      const char *name, void *opaque,
1751                                      Error **errp)
1752 {
1753     Error *local_err = NULL;
1754     LinkProperty *prop = opaque;
1755     Object **targetp = object_link_get_targetp(obj, prop);
1756     Object *old_target = *targetp;
1757     Object *new_target = NULL;
1758     char *path = NULL;
1759
1760     visit_type_str(v, name, &path, &local_err);
1761
1762     if (!local_err && strcmp(path, "") != 0) {
1763         new_target = object_resolve_link(obj, name, path, &local_err);
1764     }
1765
1766     g_free(path);
1767     if (local_err) {
1768         error_propagate(errp, local_err);
1769         return;
1770     }
1771
1772     prop->check(obj, name, new_target, &local_err);
1773     if (local_err) {
1774         error_propagate(errp, local_err);
1775         return;
1776     }
1777
1778     *targetp = new_target;
1779     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1780         object_ref(new_target);
1781         object_unref(old_target);
1782     }
1783 }
1784
1785 static Object *object_resolve_link_property(Object *parent, void *opaque,
1786                                             const char *part)
1787 {
1788     LinkProperty *lprop = opaque;
1789
1790     return *object_link_get_targetp(parent, lprop);
1791 }
1792
1793 static void object_release_link_property(Object *obj, const char *name,
1794                                          void *opaque)
1795 {
1796     LinkProperty *prop = opaque;
1797     Object **targetp = object_link_get_targetp(obj, prop);
1798
1799     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1800         object_unref(*targetp);
1801     }
1802     if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1803         g_free(prop);
1804     }
1805 }
1806
1807 static ObjectProperty *
1808 object_add_link_prop(Object *obj, const char *name,
1809                      const char *type, void *ptr,
1810                      void (*check)(const Object *, const char *,
1811                                    Object *, Error **),
1812                      ObjectPropertyLinkFlags flags)
1813 {
1814     LinkProperty *prop = g_malloc(sizeof(*prop));
1815     g_autofree char *full_type = NULL;
1816     ObjectProperty *op;
1817
1818     if (flags & OBJ_PROP_LINK_DIRECT) {
1819         prop->target = ptr;
1820     } else {
1821         prop->targetp = ptr;
1822     }
1823     prop->check = check;
1824     prop->flags = flags;
1825
1826     full_type = g_strdup_printf("link<%s>", type);
1827
1828     op = object_property_add(obj, name, full_type,
1829                              object_get_link_property,
1830                              check ? object_set_link_property : NULL,
1831                              object_release_link_property,
1832                              prop);
1833     op->resolve = object_resolve_link_property;
1834     return op;
1835 }
1836
1837 ObjectProperty *
1838 object_property_add_link(Object *obj, const char *name,
1839                          const char *type, Object **targetp,
1840                          void (*check)(const Object *, const char *,
1841                                        Object *, Error **),
1842                          ObjectPropertyLinkFlags flags)
1843 {
1844     return object_add_link_prop(obj, name, type, targetp, check, flags);
1845 }
1846
1847 ObjectProperty *
1848 object_class_property_add_link(ObjectClass *oc,
1849     const char *name,
1850     const char *type, ptrdiff_t offset,
1851     void (*check)(const Object *obj, const char *name,
1852                   Object *val, Error **errp),
1853     ObjectPropertyLinkFlags flags)
1854 {
1855     LinkProperty *prop = g_new0(LinkProperty, 1);
1856     char *full_type;
1857     ObjectProperty *op;
1858
1859     prop->offset = offset;
1860     prop->check = check;
1861     prop->flags = flags | OBJ_PROP_LINK_CLASS;
1862
1863     full_type = g_strdup_printf("link<%s>", type);
1864
1865     op = object_class_property_add(oc, name, full_type,
1866                                    object_get_link_property,
1867                                    check ? object_set_link_property : NULL,
1868                                    object_release_link_property,
1869                                    prop);
1870
1871     op->resolve = object_resolve_link_property;
1872
1873     g_free(full_type);
1874     return op;
1875 }
1876
1877 ObjectProperty *
1878 object_property_add_const_link(Object *obj, const char *name,
1879                                Object *target)
1880 {
1881     return object_add_link_prop(obj, name,
1882                                 object_get_typename(target), target,
1883                                 NULL, OBJ_PROP_LINK_DIRECT);
1884 }
1885
1886 char *object_get_canonical_path_component(Object *obj)
1887 {
1888     ObjectProperty *prop = NULL;
1889     GHashTableIter iter;
1890
1891     if (obj->parent == NULL) {
1892         return NULL;
1893     }
1894
1895     g_hash_table_iter_init(&iter, obj->parent->properties);
1896     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1897         if (!object_property_is_child(prop)) {
1898             continue;
1899         }
1900
1901         if (prop->opaque == obj) {
1902             return g_strdup(prop->name);
1903         }
1904     }
1905
1906     /* obj had a parent but was not a child, should never happen */
1907     g_assert_not_reached();
1908     return NULL;
1909 }
1910
1911 char *object_get_canonical_path(Object *obj)
1912 {
1913     Object *root = object_get_root();
1914     char *newpath, *path = NULL;
1915
1916     if (obj == root) {
1917         return g_strdup("/");
1918     }
1919
1920     do {
1921         char *component = object_get_canonical_path_component(obj);
1922
1923         if (!component) {
1924             /* A canonical path must be complete, so discard what was
1925              * collected so far.
1926              */
1927             g_free(path);
1928             return NULL;
1929         }
1930
1931         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1932         g_free(path);
1933         g_free(component);
1934         path = newpath;
1935         obj = obj->parent;
1936     } while (obj != root);
1937
1938     return path;
1939 }
1940
1941 Object *object_resolve_path_component(Object *parent, const char *part)
1942 {
1943     ObjectProperty *prop = object_property_find(parent, part, NULL);
1944     if (prop == NULL) {
1945         return NULL;
1946     }
1947
1948     if (prop->resolve) {
1949         return prop->resolve(parent, prop->opaque, part);
1950     } else {
1951         return NULL;
1952     }
1953 }
1954
1955 static Object *object_resolve_abs_path(Object *parent,
1956                                        char **parts,
1957                                        const char *typename,
1958                                        int index)
1959 {
1960     Object *child;
1961
1962     if (parts[index] == NULL) {
1963         return object_dynamic_cast(parent, typename);
1964     }
1965
1966     if (strcmp(parts[index], "") == 0) {
1967         return object_resolve_abs_path(parent, parts, typename, index + 1);
1968     }
1969
1970     child = object_resolve_path_component(parent, parts[index]);
1971     if (!child) {
1972         return NULL;
1973     }
1974
1975     return object_resolve_abs_path(child, parts, typename, index + 1);
1976 }
1977
1978 static Object *object_resolve_partial_path(Object *parent,
1979                                            char **parts,
1980                                            const char *typename,
1981                                            bool *ambiguous)
1982 {
1983     Object *obj;
1984     GHashTableIter iter;
1985     ObjectProperty *prop;
1986
1987     obj = object_resolve_abs_path(parent, parts, typename, 0);
1988
1989     g_hash_table_iter_init(&iter, parent->properties);
1990     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1991         Object *found;
1992
1993         if (!object_property_is_child(prop)) {
1994             continue;
1995         }
1996
1997         found = object_resolve_partial_path(prop->opaque, parts,
1998                                             typename, ambiguous);
1999         if (found) {
2000             if (obj) {
2001                 *ambiguous = true;
2002                 return NULL;
2003             }
2004             obj = found;
2005         }
2006
2007         if (*ambiguous) {
2008             return NULL;
2009         }
2010     }
2011
2012     return obj;
2013 }
2014
2015 Object *object_resolve_path_type(const char *path, const char *typename,
2016                                  bool *ambiguousp)
2017 {
2018     Object *obj;
2019     char **parts;
2020
2021     parts = g_strsplit(path, "/", 0);
2022     assert(parts);
2023
2024     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2025         bool ambiguous = false;
2026         obj = object_resolve_partial_path(object_get_root(), parts,
2027                                           typename, &ambiguous);
2028         if (ambiguousp) {
2029             *ambiguousp = ambiguous;
2030         }
2031     } else {
2032         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
2033     }
2034
2035     g_strfreev(parts);
2036
2037     return obj;
2038 }
2039
2040 Object *object_resolve_path(const char *path, bool *ambiguous)
2041 {
2042     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2043 }
2044
2045 typedef struct StringProperty
2046 {
2047     char *(*get)(Object *, Error **);
2048     void (*set)(Object *, const char *, Error **);
2049 } StringProperty;
2050
2051 static void property_get_str(Object *obj, Visitor *v, const char *name,
2052                              void *opaque, Error **errp)
2053 {
2054     StringProperty *prop = opaque;
2055     char *value;
2056     Error *err = NULL;
2057
2058     value = prop->get(obj, &err);
2059     if (err) {
2060         error_propagate(errp, err);
2061         return;
2062     }
2063
2064     visit_type_str(v, name, &value, errp);
2065     g_free(value);
2066 }
2067
2068 static void property_set_str(Object *obj, Visitor *v, const char *name,
2069                              void *opaque, Error **errp)
2070 {
2071     StringProperty *prop = opaque;
2072     char *value;
2073     Error *local_err = NULL;
2074
2075     visit_type_str(v, name, &value, &local_err);
2076     if (local_err) {
2077         error_propagate(errp, local_err);
2078         return;
2079     }
2080
2081     prop->set(obj, value, errp);
2082     g_free(value);
2083 }
2084
2085 static void property_release_str(Object *obj, const char *name,
2086                                  void *opaque)
2087 {
2088     StringProperty *prop = opaque;
2089     g_free(prop);
2090 }
2091
2092 ObjectProperty *
2093 object_property_add_str(Object *obj, const char *name,
2094                         char *(*get)(Object *, Error **),
2095                         void (*set)(Object *, const char *, Error **))
2096 {
2097     StringProperty *prop = g_malloc0(sizeof(*prop));
2098
2099     prop->get = get;
2100     prop->set = set;
2101
2102     return object_property_add(obj, name, "string",
2103                                get ? property_get_str : NULL,
2104                                set ? property_set_str : NULL,
2105                                property_release_str,
2106                                prop);
2107 }
2108
2109 ObjectProperty *
2110 object_class_property_add_str(ObjectClass *klass, const char *name,
2111                                    char *(*get)(Object *, Error **),
2112                                    void (*set)(Object *, const char *,
2113                                                Error **))
2114 {
2115     StringProperty *prop = g_malloc0(sizeof(*prop));
2116
2117     prop->get = get;
2118     prop->set = set;
2119
2120     return object_class_property_add(klass, name, "string",
2121                                      get ? property_get_str : NULL,
2122                                      set ? property_set_str : NULL,
2123                                      NULL,
2124                                      prop);
2125 }
2126
2127 typedef struct BoolProperty
2128 {
2129     bool (*get)(Object *, Error **);
2130     void (*set)(Object *, bool, Error **);
2131 } BoolProperty;
2132
2133 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2134                               void *opaque, Error **errp)
2135 {
2136     BoolProperty *prop = opaque;
2137     bool value;
2138     Error *err = NULL;
2139
2140     value = prop->get(obj, &err);
2141     if (err) {
2142         error_propagate(errp, err);
2143         return;
2144     }
2145
2146     visit_type_bool(v, name, &value, errp);
2147 }
2148
2149 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2150                               void *opaque, Error **errp)
2151 {
2152     BoolProperty *prop = opaque;
2153     bool value;
2154     Error *local_err = NULL;
2155
2156     visit_type_bool(v, name, &value, &local_err);
2157     if (local_err) {
2158         error_propagate(errp, local_err);
2159         return;
2160     }
2161
2162     prop->set(obj, value, errp);
2163 }
2164
2165 static void property_release_bool(Object *obj, const char *name,
2166                                   void *opaque)
2167 {
2168     BoolProperty *prop = opaque;
2169     g_free(prop);
2170 }
2171
2172 ObjectProperty *
2173 object_property_add_bool(Object *obj, const char *name,
2174                          bool (*get)(Object *, Error **),
2175                          void (*set)(Object *, bool, Error **))
2176 {
2177     BoolProperty *prop = g_malloc0(sizeof(*prop));
2178
2179     prop->get = get;
2180     prop->set = set;
2181
2182     return object_property_add(obj, name, "bool",
2183                                get ? property_get_bool : NULL,
2184                                set ? property_set_bool : NULL,
2185                                property_release_bool,
2186                                prop);
2187 }
2188
2189 ObjectProperty *
2190 object_class_property_add_bool(ObjectClass *klass, const char *name,
2191                                     bool (*get)(Object *, Error **),
2192                                     void (*set)(Object *, bool, Error **))
2193 {
2194     BoolProperty *prop = g_malloc0(sizeof(*prop));
2195
2196     prop->get = get;
2197     prop->set = set;
2198
2199     return object_class_property_add(klass, name, "bool",
2200                                      get ? property_get_bool : NULL,
2201                                      set ? property_set_bool : NULL,
2202                                      NULL,
2203                                      prop);
2204 }
2205
2206 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2207                               void *opaque, Error **errp)
2208 {
2209     EnumProperty *prop = opaque;
2210     int value;
2211     Error *err = NULL;
2212
2213     value = prop->get(obj, &err);
2214     if (err) {
2215         error_propagate(errp, err);
2216         return;
2217     }
2218
2219     visit_type_enum(v, name, &value, prop->lookup, errp);
2220 }
2221
2222 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2223                               void *opaque, Error **errp)
2224 {
2225     EnumProperty *prop = opaque;
2226     int value;
2227     Error *err = NULL;
2228
2229     visit_type_enum(v, name, &value, prop->lookup, &err);
2230     if (err) {
2231         error_propagate(errp, err);
2232         return;
2233     }
2234     prop->set(obj, value, errp);
2235 }
2236
2237 static void property_release_enum(Object *obj, const char *name,
2238                                   void *opaque)
2239 {
2240     EnumProperty *prop = opaque;
2241     g_free(prop);
2242 }
2243
2244 ObjectProperty *
2245 object_property_add_enum(Object *obj, const char *name,
2246                          const char *typename,
2247                          const QEnumLookup *lookup,
2248                          int (*get)(Object *, Error **),
2249                          void (*set)(Object *, int, Error **))
2250 {
2251     EnumProperty *prop = g_malloc(sizeof(*prop));
2252
2253     prop->lookup = lookup;
2254     prop->get = get;
2255     prop->set = set;
2256
2257     return object_property_add(obj, name, typename,
2258                                get ? property_get_enum : NULL,
2259                                set ? property_set_enum : NULL,
2260                                property_release_enum,
2261                                prop);
2262 }
2263
2264 ObjectProperty *
2265 object_class_property_add_enum(ObjectClass *klass, const char *name,
2266                                     const char *typename,
2267                                     const QEnumLookup *lookup,
2268                                     int (*get)(Object *, Error **),
2269                                     void (*set)(Object *, int, Error **))
2270 {
2271     EnumProperty *prop = g_malloc(sizeof(*prop));
2272
2273     prop->lookup = lookup;
2274     prop->get = get;
2275     prop->set = set;
2276
2277     return object_class_property_add(klass, name, typename,
2278                                      get ? property_get_enum : NULL,
2279                                      set ? property_set_enum : NULL,
2280                                      NULL,
2281                                      prop);
2282 }
2283
2284 typedef struct TMProperty {
2285     void (*get)(Object *, struct tm *, Error **);
2286 } TMProperty;
2287
2288 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2289                             void *opaque, Error **errp)
2290 {
2291     TMProperty *prop = opaque;
2292     Error *err = NULL;
2293     struct tm value;
2294
2295     prop->get(obj, &value, &err);
2296     if (err) {
2297         goto out;
2298     }
2299
2300     visit_start_struct(v, name, NULL, 0, &err);
2301     if (err) {
2302         goto out;
2303     }
2304     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2305     if (err) {
2306         goto out_end;
2307     }
2308     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2309     if (err) {
2310         goto out_end;
2311     }
2312     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2313     if (err) {
2314         goto out_end;
2315     }
2316     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2317     if (err) {
2318         goto out_end;
2319     }
2320     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2321     if (err) {
2322         goto out_end;
2323     }
2324     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2325     if (err) {
2326         goto out_end;
2327     }
2328     visit_check_struct(v, &err);
2329 out_end:
2330     visit_end_struct(v, NULL);
2331 out:
2332     error_propagate(errp, err);
2333
2334 }
2335
2336 static void property_release_tm(Object *obj, const char *name,
2337                                 void *opaque)
2338 {
2339     TMProperty *prop = opaque;
2340     g_free(prop);
2341 }
2342
2343 ObjectProperty *
2344 object_property_add_tm(Object *obj, const char *name,
2345                        void (*get)(Object *, struct tm *, Error **))
2346 {
2347     TMProperty *prop = g_malloc0(sizeof(*prop));
2348
2349     prop->get = get;
2350
2351     return object_property_add(obj, name, "struct tm",
2352                                get ? property_get_tm : NULL, NULL,
2353                                property_release_tm,
2354                                prop);
2355 }
2356
2357 ObjectProperty *
2358 object_class_property_add_tm(ObjectClass *klass, const char *name,
2359                              void (*get)(Object *, struct tm *, Error **))
2360 {
2361     TMProperty *prop = g_malloc0(sizeof(*prop));
2362
2363     prop->get = get;
2364
2365     return object_class_property_add(klass, name, "struct tm",
2366                                      get ? property_get_tm : NULL,
2367                                      NULL, NULL, prop);
2368 }
2369
2370 static char *qdev_get_type(Object *obj, Error **errp)
2371 {
2372     return g_strdup(object_get_typename(obj));
2373 }
2374
2375 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2376                                    void *opaque, Error **errp)
2377 {
2378     uint8_t value = *(uint8_t *)opaque;
2379     visit_type_uint8(v, name, &value, errp);
2380 }
2381
2382 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2383                                    void *opaque, Error **errp)
2384 {
2385     uint8_t *field = opaque;
2386     uint8_t value;
2387     Error *local_err = NULL;
2388
2389     visit_type_uint8(v, name, &value, &local_err);
2390     if (local_err) {
2391         error_propagate(errp, local_err);
2392         return;
2393     }
2394
2395     *field = value;
2396 }
2397
2398 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2399                                     void *opaque, Error **errp)
2400 {
2401     uint16_t value = *(uint16_t *)opaque;
2402     visit_type_uint16(v, name, &value, errp);
2403 }
2404
2405 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2406                                     void *opaque, Error **errp)
2407 {
2408     uint16_t *field = opaque;
2409     uint16_t value;
2410     Error *local_err = NULL;
2411
2412     visit_type_uint16(v, name, &value, &local_err);
2413     if (local_err) {
2414         error_propagate(errp, local_err);
2415         return;
2416     }
2417
2418     *field = value;
2419 }
2420
2421 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2422                                     void *opaque, Error **errp)
2423 {
2424     uint32_t value = *(uint32_t *)opaque;
2425     visit_type_uint32(v, name, &value, errp);
2426 }
2427
2428 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2429                                     void *opaque, Error **errp)
2430 {
2431     uint32_t *field = opaque;
2432     uint32_t value;
2433     Error *local_err = NULL;
2434
2435     visit_type_uint32(v, name, &value, &local_err);
2436     if (local_err) {
2437         error_propagate(errp, local_err);
2438         return;
2439     }
2440
2441     *field = value;
2442 }
2443
2444 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2445                                     void *opaque, Error **errp)
2446 {
2447     uint64_t value = *(uint64_t *)opaque;
2448     visit_type_uint64(v, name, &value, errp);
2449 }
2450
2451 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2452                                     void *opaque, Error **errp)
2453 {
2454     uint64_t *field = opaque;
2455     uint64_t value;
2456     Error *local_err = NULL;
2457
2458     visit_type_uint64(v, name, &value, &local_err);
2459     if (local_err) {
2460         error_propagate(errp, local_err);
2461         return;
2462     }
2463
2464     *field = value;
2465 }
2466
2467 ObjectProperty *
2468 object_property_add_uint8_ptr(Object *obj, const char *name,
2469                               const uint8_t *v,
2470                               ObjectPropertyFlags flags)
2471 {
2472     ObjectPropertyAccessor *getter = NULL;
2473     ObjectPropertyAccessor *setter = NULL;
2474
2475     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2476         getter = property_get_uint8_ptr;
2477     }
2478
2479     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2480         setter = property_set_uint8_ptr;
2481     }
2482
2483     return object_property_add(obj, name, "uint8",
2484                                getter, setter, NULL, (void *)v);
2485 }
2486
2487 ObjectProperty *
2488 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2489                                     const uint8_t *v,
2490                                     ObjectPropertyFlags flags)
2491 {
2492     ObjectPropertyAccessor *getter = NULL;
2493     ObjectPropertyAccessor *setter = NULL;
2494
2495     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2496         getter = property_get_uint8_ptr;
2497     }
2498
2499     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2500         setter = property_set_uint8_ptr;
2501     }
2502
2503     return object_class_property_add(klass, name, "uint8",
2504                                      getter, setter, NULL, (void *)v);
2505 }
2506
2507 ObjectProperty *
2508 object_property_add_uint16_ptr(Object *obj, const char *name,
2509                                const uint16_t *v,
2510                                ObjectPropertyFlags flags)
2511 {
2512     ObjectPropertyAccessor *getter = NULL;
2513     ObjectPropertyAccessor *setter = NULL;
2514
2515     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2516         getter = property_get_uint16_ptr;
2517     }
2518
2519     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2520         setter = property_set_uint16_ptr;
2521     }
2522
2523     return object_property_add(obj, name, "uint16",
2524                                getter, setter, NULL, (void *)v);
2525 }
2526
2527 ObjectProperty *
2528 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2529                                      const uint16_t *v,
2530                                      ObjectPropertyFlags flags)
2531 {
2532     ObjectPropertyAccessor *getter = NULL;
2533     ObjectPropertyAccessor *setter = NULL;
2534
2535     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2536         getter = property_get_uint16_ptr;
2537     }
2538
2539     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2540         setter = property_set_uint16_ptr;
2541     }
2542
2543     return object_class_property_add(klass, name, "uint16",
2544                                      getter, setter, NULL, (void *)v);
2545 }
2546
2547 ObjectProperty *
2548 object_property_add_uint32_ptr(Object *obj, const char *name,
2549                                const uint32_t *v,
2550                                ObjectPropertyFlags flags)
2551 {
2552     ObjectPropertyAccessor *getter = NULL;
2553     ObjectPropertyAccessor *setter = NULL;
2554
2555     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2556         getter = property_get_uint32_ptr;
2557     }
2558
2559     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2560         setter = property_set_uint32_ptr;
2561     }
2562
2563     return object_property_add(obj, name, "uint32",
2564                                getter, setter, NULL, (void *)v);
2565 }
2566
2567 ObjectProperty *
2568 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2569                                      const uint32_t *v,
2570                                      ObjectPropertyFlags flags)
2571 {
2572     ObjectPropertyAccessor *getter = NULL;
2573     ObjectPropertyAccessor *setter = NULL;
2574
2575     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2576         getter = property_get_uint32_ptr;
2577     }
2578
2579     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2580         setter = property_set_uint32_ptr;
2581     }
2582
2583     return object_class_property_add(klass, name, "uint32",
2584                                      getter, setter, NULL, (void *)v);
2585 }
2586
2587 ObjectProperty *
2588 object_property_add_uint64_ptr(Object *obj, const char *name,
2589                                const uint64_t *v,
2590                                ObjectPropertyFlags flags)
2591 {
2592     ObjectPropertyAccessor *getter = NULL;
2593     ObjectPropertyAccessor *setter = NULL;
2594
2595     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2596         getter = property_get_uint64_ptr;
2597     }
2598
2599     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2600         setter = property_set_uint64_ptr;
2601     }
2602
2603     return object_property_add(obj, name, "uint64",
2604                                getter, setter, NULL, (void *)v);
2605 }
2606
2607 ObjectProperty *
2608 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2609                                      const uint64_t *v,
2610                                      ObjectPropertyFlags flags)
2611 {
2612     ObjectPropertyAccessor *getter = NULL;
2613     ObjectPropertyAccessor *setter = NULL;
2614
2615     if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2616         getter = property_get_uint64_ptr;
2617     }
2618
2619     if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2620         setter = property_set_uint64_ptr;
2621     }
2622
2623     return object_class_property_add(klass, name, "uint64",
2624                                      getter, setter, NULL, (void *)v);
2625 }
2626
2627 typedef struct {
2628     Object *target_obj;
2629     char *target_name;
2630 } AliasProperty;
2631
2632 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2633                                void *opaque, Error **errp)
2634 {
2635     AliasProperty *prop = opaque;
2636
2637     object_property_get(prop->target_obj, v, prop->target_name, errp);
2638 }
2639
2640 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2641                                void *opaque, Error **errp)
2642 {
2643     AliasProperty *prop = opaque;
2644
2645     object_property_set(prop->target_obj, v, prop->target_name, errp);
2646 }
2647
2648 static Object *property_resolve_alias(Object *obj, void *opaque,
2649                                       const char *part)
2650 {
2651     AliasProperty *prop = opaque;
2652
2653     return object_resolve_path_component(prop->target_obj, prop->target_name);
2654 }
2655
2656 static void property_release_alias(Object *obj, const char *name, void *opaque)
2657 {
2658     AliasProperty *prop = opaque;
2659
2660     g_free(prop->target_name);
2661     g_free(prop);
2662 }
2663
2664 ObjectProperty *
2665 object_property_add_alias(Object *obj, const char *name,
2666                           Object *target_obj, const char *target_name)
2667 {
2668     AliasProperty *prop;
2669     ObjectProperty *op;
2670     ObjectProperty *target_prop;
2671     g_autofree char *prop_type = NULL;
2672
2673     target_prop = object_property_find(target_obj, target_name,
2674                                        &error_abort);
2675
2676     if (object_property_is_child(target_prop)) {
2677         prop_type = g_strdup_printf("link%s",
2678                                     target_prop->type + strlen("child"));
2679     } else {
2680         prop_type = g_strdup(target_prop->type);
2681     }
2682
2683     prop = g_malloc(sizeof(*prop));
2684     prop->target_obj = target_obj;
2685     prop->target_name = g_strdup(target_name);
2686
2687     op = object_property_add(obj, name, prop_type,
2688                              property_get_alias,
2689                              property_set_alias,
2690                              property_release_alias,
2691                              prop);
2692     op->resolve = property_resolve_alias;
2693     if (target_prop->defval) {
2694         op->defval = qobject_ref(target_prop->defval);
2695     }
2696
2697     object_property_set_description(obj, op->name,
2698                                     target_prop->description);
2699     return op;
2700 }
2701
2702 void object_property_set_description(Object *obj, const char *name,
2703                                      const char *description)
2704 {
2705     ObjectProperty *op;
2706
2707     op = object_property_find(obj, name, &error_abort);
2708     g_free(op->description);
2709     op->description = g_strdup(description);
2710 }
2711
2712 void object_class_property_set_description(ObjectClass *klass,
2713                                            const char *name,
2714                                            const char *description)
2715 {
2716     ObjectProperty *op;
2717
2718     op = g_hash_table_lookup(klass->properties, name);
2719     g_free(op->description);
2720     op->description = g_strdup(description);
2721 }
2722
2723 static void object_class_init(ObjectClass *klass, void *data)
2724 {
2725     object_class_property_add_str(klass, "type", qdev_get_type,
2726                                   NULL);
2727 }
2728
2729 static void register_types(void)
2730 {
2731     static TypeInfo interface_info = {
2732         .name = TYPE_INTERFACE,
2733         .class_size = sizeof(InterfaceClass),
2734         .abstract = true,
2735     };
2736
2737     static TypeInfo object_info = {
2738         .name = TYPE_OBJECT,
2739         .instance_size = sizeof(Object),
2740         .class_init = object_class_init,
2741         .abstract = true,
2742     };
2743
2744     type_interface = type_register_internal(&interface_info);
2745     type_register_internal(&object_info);
2746 }
2747
2748 type_init(register_types)