qom/object.c

   1 /*
   2  * QEMU Object Model
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/qdev-core.h"
  15 #include "qapi/error.h"
  16 #include "qom/object.h"
  17 #include "qom/object_interfaces.h"
  18 #include "qemu/cutils.h"
  19 #include "qapi/visitor.h"
  20 #include "qapi/string-input-visitor.h"
  21 #include "qapi/string-output-visitor.h"
  22 #include "qapi/qobject-input-visitor.h"
  23 #include "qapi/qapi-builtin-visit.h"
  24 #include "qapi/qmp/qerror.h"
  25 #include "qapi/qmp/qjson.h"
  26 #include "trace.h"
  27
  28 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  29  * of the QOM core on QObject?  */
  30 #include "qom/qom-qobject.h"
  31 #include "qapi/qmp/qbool.h"
  32 #include "qapi/qmp/qnum.h"
  33 #include "qapi/qmp/qstring.h"
  34 #include "qemu/error-report.h"
  35
  36 #define MAX_INTERFACES 32
  37
  38 typedef struct InterfaceImpl InterfaceImpl;
  39 typedef struct TypeImpl TypeImpl;
  40
  41 struct InterfaceImpl
  42 {
  43     const char *typename;
  44 };
  45
  46 struct TypeImpl
  47 {
  48     const char *name;
  49
  50     size_t class_size;
  51
  52     size_t instance_size;
  53
  54     void (*class_init)(ObjectClass *klass, void *data);
  55     void (*class_base_init)(ObjectClass *klass, void *data);
  56
  57     void *class_data;
  58
  59     void (*instance_init)(Object *obj);
  60     void (*instance_post_init)(Object *obj);
  61     void (*instance_finalize)(Object *obj);
  62
  63     bool abstract;
  64
  65     const char *parent;
  66     TypeImpl *parent_type;
  67
  68     ObjectClass *class;
  69
  70     int num_interfaces;
  71     InterfaceImpl interfaces[MAX_INTERFACES];
  72 };
  73
  74 static Type type_interface;
  75
  76 static GHashTable *type_table_get(void)
  77 {
  78     static GHashTable *type_table;
  79
  80     if (type_table == NULL) {
  81         type_table = g_hash_table_new(g_str_hash, g_str_equal);
  82     }
  83
  84     return type_table;
  85 }
  86
  87 static bool enumerating_types;
  88
  89 static void type_table_add(TypeImpl *ti)
  90 {
  91     assert(!enumerating_types);
  92     g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
  93 }
  94
  95 static TypeImpl *type_table_lookup(const char *name)
  96 {
  97     return g_hash_table_lookup(type_table_get(), name);
  98 }
  99
 100 static TypeImpl *type_new(const TypeInfo *info)
 101 {
 102     TypeImpl *ti = g_malloc0(sizeof(*ti));
 103     int i;
 104
 105     g_assert(info->name != NULL);
 106
 107     if (type_table_lookup(info->name) != NULL) {
 108         fprintf(stderr, "Registering `%s' which already exists\n", info->name);
 109         abort();
 110     }
 111
 112     ti->name = g_strdup(info->name);
 113     ti->parent = g_strdup(info->parent);
 114
 115     ti->class_size = info->class_size;
 116     ti->instance_size = info->instance_size;
 117
 118     ti->class_init = info->class_init;
 119     ti->class_base_init = info->class_base_init;
 120     ti->class_data = info->class_data;
 121
 122     ti->instance_init = info->instance_init;
 123     ti->instance_post_init = info->instance_post_init;
 124     ti->instance_finalize = info->instance_finalize;
 125
 126     ti->abstract = info->abstract;
 127
 128     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 129         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 130     }
 131     ti->num_interfaces = i;
 132
 133     return ti;
 134 }
 135
 136 static TypeImpl *type_register_internal(const TypeInfo *info)
 137 {
 138     TypeImpl *ti;
 139     ti = type_new(info);
 140
 141     type_table_add(ti);
 142     return ti;
 143 }
 144
 145 TypeImpl *type_register(const TypeInfo *info)
 146 {
 147     assert(info->parent);
 148     return type_register_internal(info);
 149 }
 150
 151 TypeImpl *type_register_static(const TypeInfo *info)
 152 {
 153     return type_register(info);
 154 }
 155
 156 void type_register_static_array(const TypeInfo *infos, int nr_infos)
 157 {
 158     int i;
 159
 160     for (i = 0; i < nr_infos; i++) {
 161         type_register_static(&infos[i]);
 162     }
 163 }
 164
 165 static TypeImpl *type_get_by_name(const char *name)
 166 {
 167     if (name == NULL) {
 168         return NULL;
 169     }
 170
 171     return type_table_lookup(name);
 172 }
 173
 174 static TypeImpl *type_get_parent(TypeImpl *type)
 175 {
 176     if (!type->parent_type && type->parent) {
 177         type->parent_type = type_get_by_name(type->parent);
 178         if (!type->parent_type) {
 179             fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
 180                     type->name, type->parent);
 181             abort();
 182         }
 183     }
 184
 185     return type->parent_type;
 186 }
 187
 188 static bool type_has_parent(TypeImpl *type)
 189 {
 190     return (type->parent != NULL);
 191 }
 192
 193 static size_t type_class_get_size(TypeImpl *ti)
 194 {
 195     if (ti->class_size) {
 196         return ti->class_size;
 197     }
 198
 199     if (type_has_parent(ti)) {
 200         return type_class_get_size(type_get_parent(ti));
 201     }
 202
 203     return sizeof(ObjectClass);
 204 }
 205
 206 static size_t type_object_get_size(TypeImpl *ti)
 207 {
 208     if (ti->instance_size) {
 209         return ti->instance_size;
 210     }
 211
 212     if (type_has_parent(ti)) {
 213         return type_object_get_size(type_get_parent(ti));
 214     }
 215
 216     return 0;
 217 }
 218
 219 size_t object_type_get_instance_size(const char *typename)
 220 {
 221     TypeImpl *type = type_get_by_name(typename);
 222
 223     g_assert(type != NULL);
 224     return type_object_get_size(type);
 225 }
 226
 227 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 228 {
 229     assert(target_type);
 230
 231     /* Check if target_type is a direct ancestor of type */
 232     while (type) {
 233         if (type == target_type) {
 234             return true;
 235         }
 236
 237         type = type_get_parent(type);
 238     }
 239
 240     return false;
 241 }
 242
 243 static void type_initialize(TypeImpl *ti);
 244
 245 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 246                                       TypeImpl *parent_type)
 247 {
 248     InterfaceClass *new_iface;
 249     TypeInfo info = { };
 250     TypeImpl *iface_impl;
 251
 252     info.parent = parent_type->name;
 253     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 254     info.abstract = true;
 255
 256     iface_impl = type_new(&info);
 257     iface_impl->parent_type = parent_type;
 258     type_initialize(iface_impl);
 259     g_free((char *)info.name);
 260
 261     new_iface = (InterfaceClass *)iface_impl->class;
 262     new_iface->concrete_class = ti->class;
 263     new_iface->interface_type = interface_type;
 264
 265     ti->class->interfaces = g_slist_append(ti->class->interfaces,
 266                                            iface_impl->class);
 267 }
 268
 269 static void object_property_free(gpointer data)
 270 {
 271     ObjectProperty *prop = data;
 272
 273     if (prop->defval) {
 274         qobject_unref(prop->defval);
 275         prop->defval = NULL;
 276     }
 277     g_free(prop->name);
 278     g_free(prop->type);
 279     g_free(prop->description);
 280     g_free(prop);
 281 }
 282
 283 static void type_initialize(TypeImpl *ti)
 284 {
 285     TypeImpl *parent;
 286
 287     if (ti->class) {
 288         return;
 289     }
 290
 291     ti->class_size = type_class_get_size(ti);
 292     ti->instance_size = type_object_get_size(ti);
 293     /* Any type with zero instance_size is implicitly abstract.
 294      * This means interface types are all abstract.
 295      */
 296     if (ti->instance_size == 0) {
 297         ti->abstract = true;
 298     }
 299     if (type_is_ancestor(ti, type_interface)) {
 300         assert(ti->instance_size == 0);
 301         assert(ti->abstract);
 302         assert(!ti->instance_init);
 303         assert(!ti->instance_post_init);
 304         assert(!ti->instance_finalize);
 305         assert(!ti->num_interfaces);
 306     }
 307     ti->class = g_malloc0(ti->class_size);
 308
 309     parent = type_get_parent(ti);
 310     if (parent) {
 311         type_initialize(parent);
 312         GSList *e;
 313         int i;
 314
 315         g_assert(parent->class_size <= ti->class_size);
 316         g_assert(parent->instance_size <= ti->instance_size);
 317         memcpy(ti->class, parent->class, parent->class_size);
 318         ti->class->interfaces = NULL;
 319         ti->class->properties = g_hash_table_new_full(
 320             g_str_hash, g_str_equal, NULL, object_property_free);
 321
 322         for (e = parent->class->interfaces; e; e = e->next) {
 323             InterfaceClass *iface = e->data;
 324             ObjectClass *klass = OBJECT_CLASS(iface);
 325
 326             type_initialize_interface(ti, iface->interface_type, klass->type);
 327         }
 328
 329         for (i = 0; i < ti->num_interfaces; i++) {
 330             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 331             if (!t) {
 332                 error_report("missing interface '%s' for object '%s'",
 333                              ti->interfaces[i].typename, parent->name);
 334                 abort();
 335             }
 336             for (e = ti->class->interfaces; e; e = e->next) {
 337                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 338
 339                 if (type_is_ancestor(target_type, t)) {
 340                     break;
 341                 }
 342             }
 343
 344             if (e) {
 345                 continue;
 346             }
 347
 348             type_initialize_interface(ti, t, t);
 349         }
 350     } else {
 351         ti->class->properties = g_hash_table_new_full(
 352             g_str_hash, g_str_equal, NULL, object_property_free);
 353     }
 354
 355     ti->class->type = ti;
 356
 357     while (parent) {
 358         if (parent->class_base_init) {
 359             parent->class_base_init(ti->class, ti->class_data);
 360         }
 361         parent = type_get_parent(parent);
 362     }
 363
 364     if (ti->class_init) {
 365         ti->class_init(ti->class, ti->class_data);
 366     }
 367 }
 368
 369 static void object_init_with_type(Object *obj, TypeImpl *ti)
 370 {
 371     if (type_has_parent(ti)) {
 372         object_init_with_type(obj, type_get_parent(ti));
 373     }
 374
 375     if (ti->instance_init) {
 376         ti->instance_init(obj);
 377     }
 378 }
 379
 380 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 381 {
 382     if (ti->instance_post_init) {
 383         ti->instance_post_init(obj);
 384     }
 385
 386     if (type_has_parent(ti)) {
 387         object_post_init_with_type(obj, type_get_parent(ti));
 388     }
 389 }
 390
 391 void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp)
 392 {
 393     int i;
 394
 395     if (!props) {
 396         return;
 397     }
 398
 399     for (i = 0; i < props->len; i++) {
 400         GlobalProperty *p = g_ptr_array_index(props, i);
 401         Error *err = NULL;
 402
 403         if (object_dynamic_cast(obj, p->driver) == NULL) {
 404             continue;
 405         }
 406         if (p->optional && !object_property_find(obj, p->property, NULL)) {
 407             continue;
 408         }
 409         p->used = true;
 410         object_property_parse(obj, p->value, p->property, &err);
 411         if (err != NULL) {
 412             error_prepend(&err, "can't apply global %s.%s=%s: ",
 413                           p->driver, p->property, p->value);
 414             /*
 415              * If errp != NULL, propagate error and return.
 416              * If errp == NULL, report a warning, but keep going
 417              * with the remaining globals.
 418              */
 419             if (errp) {
 420                 error_propagate(errp, err);
 421                 return;
 422             } else {
 423                 warn_report_err(err);
 424             }
 425         }
 426     }
 427 }
 428
 429 /*
 430  * Global property defaults
 431  * Slot 0: accelerator's global property defaults
 432  * Slot 1: machine's global property defaults
 433  * Slot 2: global properties from legacy command line option
 434  * Each is a GPtrArray of of GlobalProperty.
 435  * Applied in order, later entries override earlier ones.
 436  */
 437 static GPtrArray *object_compat_props[3];
 438
 439 /*
 440  * Retrieve @GPtrArray for global property defined with options
 441  * other than "-global".  These are generally used for syntactic
 442  * sugar and legacy command line options.
 443  */
 444 void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
 445 {
 446     GlobalProperty *g;
 447     if (!object_compat_props[2]) {
 448         object_compat_props[2] = g_ptr_array_new();
 449     }
 450     g = g_new0(GlobalProperty, 1);
 451     g->driver = g_strdup(driver);
 452     g->property = g_strdup(prop);
 453     g->value = g_strdup(value);
 454     g_ptr_array_add(object_compat_props[2], g);
 455 }
 456
 457 /*
 458  * Set machine's global property defaults to @compat_props.
 459  * May be called at most once.
 460  */
 461 void object_set_machine_compat_props(GPtrArray *compat_props)
 462 {
 463     assert(!object_compat_props[1]);
 464     object_compat_props[1] = compat_props;
 465 }
 466
 467 /*
 468  * Set accelerator's global property defaults to @compat_props.
 469  * May be called at most once.
 470  */
 471 void object_set_accelerator_compat_props(GPtrArray *compat_props)
 472 {
 473     assert(!object_compat_props[0]);
 474     object_compat_props[0] = compat_props;
 475 }
 476
 477 void object_apply_compat_props(Object *obj)
 478 {
 479     int i;
 480
 481     for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
 482         object_apply_global_props(obj, object_compat_props[i],
 483                                   i == 2 ? &error_fatal : &error_abort);
 484     }
 485 }
 486
 487 static void object_class_property_init_all(Object *obj)
 488 {
 489     ObjectPropertyIterator iter;
 490     ObjectProperty *prop;
 491
 492     object_class_property_iter_init(&iter, object_get_class(obj));
 493     while ((prop = object_property_iter_next(&iter))) {
 494         if (prop->init) {
 495             prop->init(obj, prop);
 496         }
 497     }
 498 }
 499
 500 static void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 501 {
 502     Object *obj = data;
 503
 504     type_initialize(type);
 505
 506     g_assert(type->instance_size >= sizeof(Object));
 507     g_assert(type->abstract == false);
 508     g_assert(size >= type->instance_size);
 509
 510     memset(obj, 0, type->instance_size);
 511     obj->class = type->class;
 512     object_ref(obj);
 513     object_class_property_init_all(obj);
 514     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 515                                             NULL, object_property_free);
 516     object_init_with_type(obj, type);
 517     object_post_init_with_type(obj, type);
 518 }
 519
 520 void object_initialize(void *data, size_t size, const char *typename)
 521 {
 522     TypeImpl *type = type_get_by_name(typename);
 523
 524     if (!type) {
 525         error_report("missing object type '%s'", typename);
 526         abort();
 527     }
 528
 529     object_initialize_with_type(data, size, type);
 530 }
 531
 532 void object_initialize_child(Object *parentobj, const char *propname,
 533                              void *childobj, size_t size, const char *type,
 534                              Error **errp, ...)
 535 {
 536     va_list vargs;
 537
 538     va_start(vargs, errp);
 539     object_initialize_childv(parentobj, propname, childobj, size, type, errp,
 540                              vargs);
 541     va_end(vargs);
 542 }
 543
 544 void object_initialize_childv(Object *parentobj, const char *propname,
 545                               void *childobj, size_t size, const char *type,
 546                               Error **errp, va_list vargs)
 547 {
 548     Error *local_err = NULL;
 549     Object *obj;
 550     UserCreatable *uc;
 551
 552     object_initialize(childobj, size, type);
 553     obj = OBJECT(childobj);
 554
 555     object_set_propv(obj, &local_err, vargs);
 556     if (local_err) {
 557         goto out;
 558     }
 559
 560     object_property_add_child(parentobj, propname, obj, &local_err);
 561     if (local_err) {
 562         goto out;
 563     }
 564
 565     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 566     if (uc) {
 567         user_creatable_complete(uc, &local_err);
 568         if (local_err) {
 569             object_unparent(obj);
 570             goto out;
 571         }
 572     }
 573
 574     /*
 575      * Since object_property_add_child added a reference to the child object,
 576      * we can drop the reference added by object_initialize(), so the child
 577      * property will own the only reference to the object.
 578      */
 579     object_unref(obj);
 580
 581 out:
 582     if (local_err) {
 583         error_propagate(errp, local_err);
 584         object_unref(obj);
 585     }
 586 }
 587
 588 static inline bool object_property_is_child(ObjectProperty *prop)
 589 {
 590     return strstart(prop->type, "child<", NULL);
 591 }
 592
 593 static void object_property_del_all(Object *obj)
 594 {
 595     ObjectProperty *prop;
 596     GHashTableIter iter;
 597     gpointer key, value;
 598     bool released;
 599
 600     do {
 601         released = false;
 602         g_hash_table_iter_init(&iter, obj->properties);
 603         while (g_hash_table_iter_next(&iter, &key, &value)) {
 604             prop = value;
 605             if (prop->release) {
 606                 prop->release(obj, prop->name, prop->opaque);
 607                 prop->release = NULL;
 608                 released = true;
 609                 break;
 610             }
 611             g_hash_table_iter_remove(&iter);
 612         }
 613     } while (released);
 614
 615     g_hash_table_unref(obj->properties);
 616 }
 617
 618 static void object_property_del_child(Object *obj, Object *child, Error **errp)
 619 {
 620     ObjectProperty *prop;
 621     GHashTableIter iter;
 622     gpointer key, value;
 623
 624     g_hash_table_iter_init(&iter, obj->properties);
 625     while (g_hash_table_iter_next(&iter, &key, &value)) {
 626         prop = value;
 627         if (object_property_is_child(prop) && prop->opaque == child) {
 628             if (prop->release) {
 629                 prop->release(obj, prop->name, prop->opaque);
 630                 prop->release = NULL;
 631             }
 632             break;
 633         }
 634     }
 635     g_hash_table_iter_init(&iter, obj->properties);
 636     while (g_hash_table_iter_next(&iter, &key, &value)) {
 637         prop = value;
 638         if (object_property_is_child(prop) && prop->opaque == child) {
 639             g_hash_table_iter_remove(&iter);
 640             break;
 641         }
 642     }
 643 }
 644
 645 void object_unparent(Object *obj)
 646 {
 647     if (obj->parent) {
 648         object_property_del_child(obj->parent, obj, NULL);
 649     }
 650 }
 651
 652 static void object_deinit(Object *obj, TypeImpl *type)
 653 {
 654     if (type->instance_finalize) {
 655         type->instance_finalize(obj);
 656     }
 657
 658     if (type_has_parent(type)) {
 659         object_deinit(obj, type_get_parent(type));
 660     }
 661 }
 662
 663 static void object_finalize(void *data)
 664 {
 665     Object *obj = data;
 666     TypeImpl *ti = obj->class->type;
 667
 668     object_property_del_all(obj);
 669     object_deinit(obj, ti);
 670
 671     g_assert(obj->ref == 0);
 672     if (obj->free) {
 673         obj->free(obj);
 674     }
 675 }
 676
 677 static Object *object_new_with_type(Type type)
 678 {
 679     Object *obj;
 680
 681     g_assert(type != NULL);
 682     type_initialize(type);
 683
 684     obj = g_malloc(type->instance_size);
 685     object_initialize_with_type(obj, type->instance_size, type);
 686     obj->free = g_free;
 687
 688     return obj;
 689 }
 690
 691 Object *object_new_with_class(ObjectClass *klass)
 692 {
 693     return object_new_with_type(klass->type);
 694 }
 695
 696 Object *object_new(const char *typename)
 697 {
 698     TypeImpl *ti = type_get_by_name(typename);
 699
 700     return object_new_with_type(ti);
 701 }
 702
 703
 704 Object *object_new_with_props(const char *typename,
 705                               Object *parent,
 706                               const char *id,
 707                               Error **errp,
 708                               ...)
 709 {
 710     va_list vargs;
 711     Object *obj;
 712
 713     va_start(vargs, errp);
 714     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 715     va_end(vargs);
 716
 717     return obj;
 718 }
 719
 720
 721 Object *object_new_with_propv(const char *typename,
 722                               Object *parent,
 723                               const char *id,
 724                               Error **errp,
 725                               va_list vargs)
 726 {
 727     Object *obj;
 728     ObjectClass *klass;
 729     Error *local_err = NULL;
 730     UserCreatable *uc;
 731
 732     klass = object_class_by_name(typename);
 733     if (!klass) {
 734         error_setg(errp, "invalid object type: %s", typename);
 735         return NULL;
 736     }
 737
 738     if (object_class_is_abstract(klass)) {
 739         error_setg(errp, "object type '%s' is abstract", typename);
 740         return NULL;
 741     }
 742     obj = object_new_with_type(klass->type);
 743
 744     if (object_set_propv(obj, &local_err, vargs) < 0) {
 745         goto error;
 746     }
 747
 748     if (id != NULL) {
 749         object_property_add_child(parent, id, obj, &local_err);
 750         if (local_err) {
 751             goto error;
 752         }
 753     }
 754
 755     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
 756     if (uc) {
 757         user_creatable_complete(uc, &local_err);
 758         if (local_err) {
 759             if (id != NULL) {
 760                 object_unparent(obj);
 761             }
 762             goto error;
 763         }
 764     }
 765
 766     object_unref(OBJECT(obj));
 767     return obj;
 768
 769  error:
 770     error_propagate(errp, local_err);
 771     object_unref(obj);
 772     return NULL;
 773 }
 774
 775
 776 int object_set_props(Object *obj,
 777                      Error **errp,
 778                      ...)
 779 {
 780     va_list vargs;
 781     int ret;
 782
 783     va_start(vargs, errp);
 784     ret = object_set_propv(obj, errp, vargs);
 785     va_end(vargs);
 786
 787     return ret;
 788 }
 789
 790
 791 int object_set_propv(Object *obj,
 792                      Error **errp,
 793                      va_list vargs)
 794 {
 795     const char *propname;
 796     Error *local_err = NULL;
 797
 798     propname = va_arg(vargs, char *);
 799     while (propname != NULL) {
 800         const char *value = va_arg(vargs, char *);
 801
 802         g_assert(value != NULL);
 803         object_property_parse(obj, value, propname, &local_err);
 804         if (local_err) {
 805             error_propagate(errp, local_err);
 806             return -1;
 807         }
 808         propname = va_arg(vargs, char *);
 809     }
 810
 811     return 0;
 812 }
 813
 814
 815 Object *object_dynamic_cast(Object *obj, const char *typename)
 816 {
 817     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 818         return obj;
 819     }
 820
 821     return NULL;
 822 }
 823
 824 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 825                                    const char *file, int line, const char *func)
 826 {
 827     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 828                                      typename, file, line, func);
 829
 830 #ifdef CONFIG_QOM_CAST_DEBUG
 831     int i;
 832     Object *inst;
 833
 834     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 835         if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
 836             goto out;
 837         }
 838     }
 839
 840     inst = object_dynamic_cast(obj, typename);
 841
 842     if (!inst && obj) {
 843         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 844                 file, line, func, obj, typename);
 845         abort();
 846     }
 847
 848     assert(obj == inst);
 849
 850     if (obj && obj == inst) {
 851         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 852             atomic_set(&obj->class->object_cast_cache[i - 1],
 853                        atomic_read(&obj->class->object_cast_cache[i]));
 854         }
 855         atomic_set(&obj->class->object_cast_cache[i - 1], typename);
 856     }
 857
 858 out:
 859 #endif
 860     return obj;
 861 }
 862
 863 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 864                                        const char *typename)
 865 {
 866     ObjectClass *ret = NULL;
 867     TypeImpl *target_type;
 868     TypeImpl *type;
 869
 870     if (!class) {
 871         return NULL;
 872     }
 873
 874     /* A simple fast path that can trigger a lot for leaf classes.  */
 875     type = class->type;
 876     if (type->name == typename) {
 877         return class;
 878     }
 879
 880     target_type = type_get_by_name(typename);
 881     if (!target_type) {
 882         /* target class type unknown, so fail the cast */
 883         return NULL;
 884     }
 885
 886     if (type->class->interfaces &&
 887             type_is_ancestor(target_type, type_interface)) {
 888         int found = 0;
 889         GSList *i;
 890
 891         for (i = class->interfaces; i; i = i->next) {
 892             ObjectClass *target_class = i->data;
 893
 894             if (type_is_ancestor(target_class->type, target_type)) {
 895                 ret = target_class;
 896                 found++;
 897             }
 898          }
 899
 900         /* The match was ambiguous, don't allow a cast */
 901         if (found > 1) {
 902             ret = NULL;
 903         }
 904     } else if (type_is_ancestor(type, target_type)) {
 905         ret = class;
 906     }
 907
 908     return ret;
 909 }
 910
 911 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 912                                               const char *typename,
 913                                               const char *file, int line,
 914                                               const char *func)
 915 {
 916     ObjectClass *ret;
 917
 918     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 919                                            typename, file, line, func);
 920
 921 #ifdef CONFIG_QOM_CAST_DEBUG
 922     int i;
 923
 924     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 925         if (atomic_read(&class->class_cast_cache[i]) == typename) {
 926             ret = class;
 927             goto out;
 928         }
 929     }
 930 #else
 931     if (!class || !class->interfaces) {
 932         return class;
 933     }
 934 #endif
 935
 936     ret = object_class_dynamic_cast(class, typename);
 937     if (!ret && class) {
 938         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 939                 file, line, func, class, typename);
 940         abort();
 941     }
 942
 943 #ifdef CONFIG_QOM_CAST_DEBUG
 944     if (class && ret == class) {
 945         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 946             atomic_set(&class->class_cast_cache[i - 1],
 947                        atomic_read(&class->class_cast_cache[i]));
 948         }
 949         atomic_set(&class->class_cast_cache[i - 1], typename);
 950     }
 951 out:
 952 #endif
 953     return ret;
 954 }
 955
 956 const char *object_get_typename(const Object *obj)
 957 {
 958     return obj->class->type->name;
 959 }
 960
 961 ObjectClass *object_get_class(Object *obj)
 962 {
 963     return obj->class;
 964 }
 965
 966 bool object_class_is_abstract(ObjectClass *klass)
 967 {
 968     return klass->type->abstract;
 969 }
 970
 971 const char *object_class_get_name(ObjectClass *klass)
 972 {
 973     return klass->type->name;
 974 }
 975
 976 ObjectClass *object_class_by_name(const char *typename)
 977 {
 978     TypeImpl *type = type_get_by_name(typename);
 979
 980     if (!type) {
 981         return NULL;
 982     }
 983
 984     type_initialize(type);
 985
 986     return type->class;
 987 }
 988
 989 ObjectClass *object_class_get_parent(ObjectClass *class)
 990 {
 991     TypeImpl *type = type_get_parent(class->type);
 992
 993     if (!type) {
 994         return NULL;
 995     }
 996
 997     type_initialize(type);
 998
 999     return type->class;
1000 }
1001
1002 typedef struct OCFData
1003 {
1004     void (*fn)(ObjectClass *klass, void *opaque);
1005     const char *implements_type;
1006     bool include_abstract;
1007     void *opaque;
1008 } OCFData;
1009
1010 static void object_class_foreach_tramp(gpointer key, gpointer value,
1011                                        gpointer opaque)
1012 {
1013     OCFData *data = opaque;
1014     TypeImpl *type = value;
1015     ObjectClass *k;
1016
1017     type_initialize(type);
1018     k = type->class;
1019
1020     if (!data->include_abstract && type->abstract) {
1021         return;
1022     }
1023
1024     if (data->implements_type &&
1025         !object_class_dynamic_cast(k, data->implements_type)) {
1026         return;
1027     }
1028
1029     data->fn(k, data->opaque);
1030 }
1031
1032 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1033                           const char *implements_type, bool include_abstract,
1034                           void *opaque)
1035 {
1036     OCFData data = { fn, implements_type, include_abstract, opaque };
1037
1038     enumerating_types = true;
1039     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1040     enumerating_types = false;
1041 }
1042
1043 static int do_object_child_foreach(Object *obj,
1044                                    int (*fn)(Object *child, void *opaque),
1045                                    void *opaque, bool recurse)
1046 {
1047     GHashTableIter iter;
1048     ObjectProperty *prop;
1049     int ret = 0;
1050
1051     g_hash_table_iter_init(&iter, obj->properties);
1052     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1053         if (object_property_is_child(prop)) {
1054             Object *child = prop->opaque;
1055
1056             ret = fn(child, opaque);
1057             if (ret != 0) {
1058                 break;
1059             }
1060             if (recurse) {
1061                 do_object_child_foreach(child, fn, opaque, true);
1062             }
1063         }
1064     }
1065     return ret;
1066 }
1067
1068 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1069                          void *opaque)
1070 {
1071     return do_object_child_foreach(obj, fn, opaque, false);
1072 }
1073
1074 int object_child_foreach_recursive(Object *obj,
1075                                    int (*fn)(Object *child, void *opaque),
1076                                    void *opaque)
1077 {
1078     return do_object_child_foreach(obj, fn, opaque, true);
1079 }
1080
1081 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1082 {
1083     GSList **list = opaque;
1084
1085     *list = g_slist_prepend(*list, klass);
1086 }
1087
1088 GSList *object_class_get_list(const char *implements_type,
1089                               bool include_abstract)
1090 {
1091     GSList *list = NULL;
1092
1093     object_class_foreach(object_class_get_list_tramp,
1094                          implements_type, include_abstract, &list);
1095     return list;
1096 }
1097
1098 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1099 {
1100     return strcasecmp(object_class_get_name((ObjectClass *)a),
1101                       object_class_get_name((ObjectClass *)b));
1102 }
1103
1104 GSList *object_class_get_list_sorted(const char *implements_type,
1105                                      bool include_abstract)
1106 {
1107     return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1108                         object_class_cmp);
1109 }
1110
1111 void object_ref(Object *obj)
1112 {
1113     if (!obj) {
1114         return;
1115     }
1116     atomic_inc(&obj->ref);
1117 }
1118
1119 void object_unref(Object *obj)
1120 {
1121     if (!obj) {
1122         return;
1123     }
1124     g_assert(obj->ref > 0);
1125
1126     /* parent always holds a reference to its children */
1127     if (atomic_fetch_dec(&obj->ref) == 1) {
1128         object_finalize(obj);
1129     }
1130 }
1131
1132 ObjectProperty *
1133 object_property_add(Object *obj, const char *name, const char *type,
1134                     ObjectPropertyAccessor *get,
1135                     ObjectPropertyAccessor *set,
1136                     ObjectPropertyRelease *release,
1137                     void *opaque, Error **errp)
1138 {
1139     ObjectProperty *prop;
1140     size_t name_len = strlen(name);
1141
1142     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1143         int i;
1144         ObjectProperty *ret;
1145         char *name_no_array = g_strdup(name);
1146
1147         name_no_array[name_len - 3] = '\0';
1148         for (i = 0; ; ++i) {
1149             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1150
1151             ret = object_property_add(obj, full_name, type, get, set,
1152                                       release, opaque, NULL);
1153             g_free(full_name);
1154             if (ret) {
1155                 break;
1156             }
1157         }
1158         g_free(name_no_array);
1159         return ret;
1160     }
1161
1162     if (object_property_find(obj, name, NULL) != NULL) {
1163         error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1164                    name, object_get_typename(obj));
1165         return NULL;
1166     }
1167
1168     prop = g_malloc0(sizeof(*prop));
1169
1170     prop->name = g_strdup(name);
1171     prop->type = g_strdup(type);
1172
1173     prop->get = get;
1174     prop->set = set;
1175     prop->release = release;
1176     prop->opaque = opaque;
1177
1178     g_hash_table_insert(obj->properties, prop->name, prop);
1179     return prop;
1180 }
1181
1182 ObjectProperty *
1183 object_class_property_add(ObjectClass *klass,
1184                           const char *name,
1185                           const char *type,
1186                           ObjectPropertyAccessor *get,
1187                           ObjectPropertyAccessor *set,
1188                           ObjectPropertyRelease *release,
1189                           void *opaque,
1190                           Error **errp)
1191 {
1192     ObjectProperty *prop;
1193
1194     if (object_class_property_find(klass, name, NULL) != NULL) {
1195         error_setg(errp, "attempt to add duplicate property '%s' to class (type '%s')",
1196                    name, object_class_get_name(klass));
1197         return NULL;
1198     }
1199
1200     prop = g_malloc0(sizeof(*prop));
1201
1202     prop->name = g_strdup(name);
1203     prop->type = g_strdup(type);
1204
1205     prop->get = get;
1206     prop->set = set;
1207     prop->release = release;
1208     prop->opaque = opaque;
1209
1210     g_hash_table_insert(klass->properties, prop->name, prop);
1211
1212     return prop;
1213 }
1214
1215 ObjectProperty *object_property_find(Object *obj, const char *name,
1216                                      Error **errp)
1217 {
1218     ObjectProperty *prop;
1219     ObjectClass *klass = object_get_class(obj);
1220
1221     prop = object_class_property_find(klass, name, NULL);
1222     if (prop) {
1223         return prop;
1224     }
1225
1226     prop = g_hash_table_lookup(obj->properties, name);
1227     if (prop) {
1228         return prop;
1229     }
1230
1231     error_setg(errp, "Property '.%s' not found", name);
1232     return NULL;
1233 }
1234
1235 void object_property_iter_init(ObjectPropertyIterator *iter,
1236                                Object *obj)
1237 {
1238     g_hash_table_iter_init(&iter->iter, obj->properties);
1239     iter->nextclass = object_get_class(obj);
1240 }
1241
1242 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1243 {
1244     gpointer key, val;
1245     while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1246         if (!iter->nextclass) {
1247             return NULL;
1248         }
1249         g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1250         iter->nextclass = object_class_get_parent(iter->nextclass);
1251     }
1252     return val;
1253 }
1254
1255 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1256                                      ObjectClass *klass)
1257 {
1258     g_hash_table_iter_init(&iter->iter, klass->properties);
1259     iter->nextclass = object_class_get_parent(klass);
1260 }
1261
1262 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1263                                            Error **errp)
1264 {
1265     ObjectProperty *prop;
1266     ObjectClass *parent_klass;
1267
1268     parent_klass = object_class_get_parent(klass);
1269     if (parent_klass) {
1270         prop = object_class_property_find(parent_klass, name, NULL);
1271         if (prop) {
1272             return prop;
1273         }
1274     }
1275
1276     prop = g_hash_table_lookup(klass->properties, name);
1277     if (!prop) {
1278         error_setg(errp, "Property '.%s' not found", name);
1279     }
1280     return prop;
1281 }
1282
1283 void object_property_del(Object *obj, const char *name, Error **errp)
1284 {
1285     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1286
1287     if (!prop) {
1288         error_setg(errp, "Property '.%s' not found", name);
1289         return;
1290     }
1291
1292     if (prop->release) {
1293         prop->release(obj, name, prop->opaque);
1294     }
1295     g_hash_table_remove(obj->properties, name);
1296 }
1297
1298 void object_property_get(Object *obj, Visitor *v, const char *name,
1299                          Error **errp)
1300 {
1301     ObjectProperty *prop = object_property_find(obj, name, errp);
1302     if (prop == NULL) {
1303         return;
1304     }
1305
1306     if (!prop->get) {
1307         error_setg(errp, QERR_PERMISSION_DENIED);
1308     } else {
1309         prop->get(obj, v, name, prop->opaque, errp);
1310     }
1311 }
1312
1313 void object_property_set(Object *obj, Visitor *v, const char *name,
1314                          Error **errp)
1315 {
1316     ObjectProperty *prop = object_property_find(obj, name, errp);
1317     if (prop == NULL) {
1318         return;
1319     }
1320
1321     if (!prop->set) {
1322         error_setg(errp, QERR_PERMISSION_DENIED);
1323     } else {
1324         prop->set(obj, v, name, prop->opaque, errp);
1325     }
1326 }
1327
1328 void object_property_set_str(Object *obj, const char *value,
1329                              const char *name, Error **errp)
1330 {
1331     QString *qstr = qstring_from_str(value);
1332     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1333
1334     qobject_unref(qstr);
1335 }
1336
1337 char *object_property_get_str(Object *obj, const char *name,
1338                               Error **errp)
1339 {
1340     QObject *ret = object_property_get_qobject(obj, name, errp);
1341     char *retval;
1342
1343     if (!ret) {
1344         return NULL;
1345     }
1346
1347     retval = g_strdup(qobject_get_try_str(ret));
1348     if (!retval) {
1349         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1350     }
1351
1352     qobject_unref(ret);
1353     return retval;
1354 }
1355
1356 void object_property_set_link(Object *obj, Object *value,
1357                               const char *name, Error **errp)
1358 {
1359     if (value) {
1360         gchar *path = object_get_canonical_path(value);
1361         object_property_set_str(obj, path, name, errp);
1362         g_free(path);
1363     } else {
1364         object_property_set_str(obj, "", name, errp);
1365     }
1366 }
1367
1368 Object *object_property_get_link(Object *obj, const char *name,
1369                                  Error **errp)
1370 {
1371     char *str = object_property_get_str(obj, name, errp);
1372     Object *target = NULL;
1373
1374     if (str && *str) {
1375         target = object_resolve_path(str, NULL);
1376         if (!target) {
1377             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1378                       "Device '%s' not found", str);
1379         }
1380     }
1381
1382     g_free(str);
1383     return target;
1384 }
1385
1386 void object_property_set_bool(Object *obj, bool value,
1387                               const char *name, Error **errp)
1388 {
1389     QBool *qbool = qbool_from_bool(value);
1390     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1391
1392     qobject_unref(qbool);
1393 }
1394
1395 bool object_property_get_bool(Object *obj, const char *name,
1396                               Error **errp)
1397 {
1398     QObject *ret = object_property_get_qobject(obj, name, errp);
1399     QBool *qbool;
1400     bool retval;
1401
1402     if (!ret) {
1403         return false;
1404     }
1405     qbool = qobject_to(QBool, ret);
1406     if (!qbool) {
1407         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1408         retval = false;
1409     } else {
1410         retval = qbool_get_bool(qbool);
1411     }
1412
1413     qobject_unref(ret);
1414     return retval;
1415 }
1416
1417 void object_property_set_int(Object *obj, int64_t value,
1418                              const char *name, Error **errp)
1419 {
1420     QNum *qnum = qnum_from_int(value);
1421     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1422
1423     qobject_unref(qnum);
1424 }
1425
1426 int64_t object_property_get_int(Object *obj, const char *name,
1427                                 Error **errp)
1428 {
1429     QObject *ret = object_property_get_qobject(obj, name, errp);
1430     QNum *qnum;
1431     int64_t retval;
1432
1433     if (!ret) {
1434         return -1;
1435     }
1436
1437     qnum = qobject_to(QNum, ret);
1438     if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1439         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1440         retval = -1;
1441     }
1442
1443     qobject_unref(ret);
1444     return retval;
1445 }
1446
1447 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1448 {
1449     Visitor *v = qobject_input_visitor_new(prop->defval);
1450
1451     assert(prop->set != NULL);
1452     prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1453
1454     visit_free(v);
1455 }
1456
1457 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1458 {
1459     assert(!prop->defval);
1460     assert(!prop->init);
1461
1462     prop->defval = defval;
1463     prop->init = object_property_init_defval;
1464 }
1465
1466 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1467 {
1468     object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1469 }
1470
1471 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1472 {
1473     object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1474 }
1475
1476 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1477 {
1478     object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1479 }
1480
1481 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1482 {
1483     object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1484 }
1485
1486 void object_property_set_uint(Object *obj, uint64_t value,
1487                               const char *name, Error **errp)
1488 {
1489     QNum *qnum = qnum_from_uint(value);
1490
1491     object_property_set_qobject(obj, QOBJECT(qnum), name, errp);
1492     qobject_unref(qnum);
1493 }
1494
1495 uint64_t object_property_get_uint(Object *obj, const char *name,
1496                                   Error **errp)
1497 {
1498     QObject *ret = object_property_get_qobject(obj, name, errp);
1499     QNum *qnum;
1500     uint64_t retval;
1501
1502     if (!ret) {
1503         return 0;
1504     }
1505     qnum = qobject_to(QNum, ret);
1506     if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1507         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1508         retval = 0;
1509     }
1510
1511     qobject_unref(ret);
1512     return retval;
1513 }
1514
1515 typedef struct EnumProperty {
1516     const QEnumLookup *lookup;
1517     int (*get)(Object *, Error **);
1518     void (*set)(Object *, int, Error **);
1519 } EnumProperty;
1520
1521 int object_property_get_enum(Object *obj, const char *name,
1522                              const char *typename, Error **errp)
1523 {
1524     Error *err = NULL;
1525     Visitor *v;
1526     char *str;
1527     int ret;
1528     ObjectProperty *prop = object_property_find(obj, name, errp);
1529     EnumProperty *enumprop;
1530
1531     if (prop == NULL) {
1532         return 0;
1533     }
1534
1535     if (!g_str_equal(prop->type, typename)) {
1536         error_setg(errp, "Property %s on %s is not '%s' enum type",
1537                    name, object_class_get_name(
1538                        object_get_class(obj)), typename);
1539         return 0;
1540     }
1541
1542     enumprop = prop->opaque;
1543
1544     v = string_output_visitor_new(false, &str);
1545     object_property_get(obj, v, name, &err);
1546     if (err) {
1547         error_propagate(errp, err);
1548         visit_free(v);
1549         return 0;
1550     }
1551     visit_complete(v, &str);
1552     visit_free(v);
1553     v = string_input_visitor_new(str);
1554     visit_type_enum(v, name, &ret, enumprop->lookup, errp);
1555
1556     g_free(str);
1557     visit_free(v);
1558
1559     return ret;
1560 }
1561
1562 void object_property_get_uint16List(Object *obj, const char *name,
1563                                     uint16List **list, Error **errp)
1564 {
1565     Error *err = NULL;
1566     Visitor *v;
1567     char *str;
1568
1569     v = string_output_visitor_new(false, &str);
1570     object_property_get(obj, v, name, &err);
1571     if (err) {
1572         error_propagate(errp, err);
1573         goto out;
1574     }
1575     visit_complete(v, &str);
1576     visit_free(v);
1577     v = string_input_visitor_new(str);
1578     visit_type_uint16List(v, NULL, list, errp);
1579
1580     g_free(str);
1581 out:
1582     visit_free(v);
1583 }
1584
1585 void object_property_parse(Object *obj, const char *string,
1586                            const char *name, Error **errp)
1587 {
1588     Visitor *v = string_input_visitor_new(string);
1589     object_property_set(obj, v, name, errp);
1590     visit_free(v);
1591 }
1592
1593 char *object_property_print(Object *obj, const char *name, bool human,
1594                             Error **errp)
1595 {
1596     Visitor *v;
1597     char *string = NULL;
1598     Error *local_err = NULL;
1599
1600     v = string_output_visitor_new(human, &string);
1601     object_property_get(obj, v, name, &local_err);
1602     if (local_err) {
1603         error_propagate(errp, local_err);
1604         goto out;
1605     }
1606
1607     visit_complete(v, &string);
1608
1609 out:
1610     visit_free(v);
1611     return string;
1612 }
1613
1614 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1615 {
1616     ObjectProperty *prop = object_property_find(obj, name, errp);
1617     if (prop == NULL) {
1618         return NULL;
1619     }
1620
1621     return prop->type;
1622 }
1623
1624 Object *object_get_root(void)
1625 {
1626     static Object *root;
1627
1628     if (!root) {
1629         root = object_new("container");
1630     }
1631
1632     return root;
1633 }
1634
1635 Object *object_get_objects_root(void)
1636 {
1637     return container_get(object_get_root(), "/objects");
1638 }
1639
1640 Object *object_get_internal_root(void)
1641 {
1642     static Object *internal_root;
1643
1644     if (!internal_root) {
1645         internal_root = object_new("container");
1646     }
1647
1648     return internal_root;
1649 }
1650
1651 static void object_get_child_property(Object *obj, Visitor *v,
1652                                       const char *name, void *opaque,
1653                                       Error **errp)
1654 {
1655     Object *child = opaque;
1656     gchar *path;
1657
1658     path = object_get_canonical_path(child);
1659     visit_type_str(v, name, &path, errp);
1660     g_free(path);
1661 }
1662
1663 static Object *object_resolve_child_property(Object *parent, void *opaque, const gchar *part)
1664 {
1665     return opaque;
1666 }
1667
1668 static void object_finalize_child_property(Object *obj, const char *name,
1669                                            void *opaque)
1670 {
1671     Object *child = opaque;
1672
1673     if (child->class->unparent) {
1674         (child->class->unparent)(child);
1675     }
1676     child->parent = NULL;
1677     object_unref(child);
1678 }
1679
1680 void object_property_add_child(Object *obj, const char *name,
1681                                Object *child, Error **errp)
1682 {
1683     Error *local_err = NULL;
1684     gchar *type;
1685     ObjectProperty *op;
1686
1687     if (child->parent != NULL) {
1688         error_setg(errp, "child object is already parented");
1689         return;
1690     }
1691
1692     type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
1693
1694     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1695                              object_finalize_child_property, child, &local_err);
1696     if (local_err) {
1697         error_propagate(errp, local_err);
1698         goto out;
1699     }
1700
1701     op->resolve = object_resolve_child_property;
1702     object_ref(child);
1703     child->parent = obj;
1704
1705 out:
1706     g_free(type);
1707 }
1708
1709 void object_property_allow_set_link(const Object *obj, const char *name,
1710                                     Object *val, Error **errp)
1711 {
1712     /* Allow the link to be set, always */
1713 }
1714
1715 typedef struct {
1716     union {
1717         Object **targetp;
1718         Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer  */
1719     };
1720     void (*check)(const Object *, const char *, Object *, Error **);
1721     ObjectPropertyLinkFlags flags;
1722 } LinkProperty;
1723
1724 static Object **
1725 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1726 {
1727     if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1728         return &lprop->target;
1729     } else {
1730         return lprop->targetp;
1731     }
1732 }
1733
1734 static void object_get_link_property(Object *obj, Visitor *v,
1735                                      const char *name, void *opaque,
1736                                      Error **errp)
1737 {
1738     LinkProperty *lprop = opaque;
1739     Object **targetp = object_link_get_targetp(obj, lprop);
1740     gchar *path;
1741
1742     if (*targetp) {
1743         path = object_get_canonical_path(*targetp);
1744         visit_type_str(v, name, &path, errp);
1745         g_free(path);
1746     } else {
1747         path = (gchar *)"";
1748         visit_type_str(v, name, &path, errp);
1749     }
1750 }
1751
1752 /*
1753  * object_resolve_link:
1754  *
1755  * Lookup an object and ensure its type matches the link property type.  This
1756  * is similar to object_resolve_path() except type verification against the
1757  * link property is performed.
1758  *
1759  * Returns: The matched object or NULL on path lookup failures.
1760  */
1761 static Object *object_resolve_link(Object *obj, const char *name,
1762                                    const char *path, Error **errp)
1763 {
1764     const char *type;
1765     gchar *target_type;
1766     bool ambiguous = false;
1767     Object *target;
1768
1769     /* Go from link<FOO> to FOO.  */
1770     type = object_property_get_type(obj, name, NULL);
1771     target_type = g_strndup(&type[5], strlen(type) - 6);
1772     target = object_resolve_path_type(path, target_type, &ambiguous);
1773
1774     if (ambiguous) {
1775         error_setg(errp, "Path '%s' does not uniquely identify an object",
1776                    path);
1777     } else if (!target) {
1778         target = object_resolve_path(path, &ambiguous);
1779         if (target || ambiguous) {
1780             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1781         } else {
1782             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1783                       "Device '%s' not found", path);
1784         }
1785         target = NULL;
1786     }
1787     g_free(target_type);
1788
1789     return target;
1790 }
1791
1792 static void object_set_link_property(Object *obj, Visitor *v,
1793                                      const char *name, void *opaque,
1794                                      Error **errp)
1795 {
1796     Error *local_err = NULL;
1797     LinkProperty *prop = opaque;
1798     Object **targetp = object_link_get_targetp(obj, prop);
1799     Object *old_target = *targetp;
1800     Object *new_target = NULL;
1801     char *path = NULL;
1802
1803     visit_type_str(v, name, &path, &local_err);
1804
1805     if (!local_err && strcmp(path, "") != 0) {
1806         new_target = object_resolve_link(obj, name, path, &local_err);
1807     }
1808
1809     g_free(path);
1810     if (local_err) {
1811         error_propagate(errp, local_err);
1812         return;
1813     }
1814
1815     prop->check(obj, name, new_target, &local_err);
1816     if (local_err) {
1817         error_propagate(errp, local_err);
1818         return;
1819     }
1820
1821     *targetp = new_target;
1822     if (prop->flags & OBJ_PROP_LINK_STRONG) {
1823         object_ref(new_target);
1824         object_unref(old_target);
1825     }
1826 }
1827
1828 static Object *object_resolve_link_property(Object *parent, void *opaque, const gchar *part)
1829 {
1830     LinkProperty *lprop = opaque;
1831
1832     return *object_link_get_targetp(parent, lprop);
1833 }
1834
1835 static void object_release_link_property(Object *obj, const char *name,
1836                                          void *opaque)
1837 {
1838     LinkProperty *prop = opaque;
1839     Object **targetp = object_link_get_targetp(obj, prop);
1840
1841     if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1842         object_unref(*targetp);
1843     }
1844     g_free(prop);
1845 }
1846
1847 static void object_add_link_prop(Object *obj, const char *name,
1848                                  const char *type, void *ptr,
1849                                  void (*check)(const Object *, const char *,
1850                                                Object *, Error **),
1851                                  ObjectPropertyLinkFlags flags,
1852                                  Error **errp)
1853 {
1854     Error *local_err = NULL;
1855     LinkProperty *prop = g_malloc(sizeof(*prop));
1856     gchar *full_type;
1857     ObjectProperty *op;
1858
1859     if (flags & OBJ_PROP_LINK_DIRECT) {
1860         prop->target = ptr;
1861     } else {
1862         prop->targetp = ptr;
1863     }
1864     prop->check = check;
1865     prop->flags = flags;
1866
1867     full_type = g_strdup_printf("link<%s>", type);
1868
1869     op = object_property_add(obj, name, full_type,
1870                              object_get_link_property,
1871                              check ? object_set_link_property : NULL,
1872                              object_release_link_property,
1873                              prop,
1874                              &local_err);
1875     if (local_err) {
1876         error_propagate(errp, local_err);
1877         g_free(prop);
1878         goto out;
1879     }
1880
1881     op->resolve = object_resolve_link_property;
1882
1883 out:
1884     g_free(full_type);
1885 }
1886
1887 void object_property_add_link(Object *obj, const char *name,
1888                               const char *type, Object **targetp,
1889                               void (*check)(const Object *, const char *,
1890                                             Object *, Error **),
1891                               ObjectPropertyLinkFlags flags,
1892                               Error **errp)
1893 {
1894     object_add_link_prop(obj, name, type, targetp, check, flags, errp);
1895 }
1896
1897 void object_property_add_const_link(Object *obj, const char *name,
1898                                     Object *target, Error **errp)
1899 {
1900     object_add_link_prop(obj, name, object_get_typename(target), target,
1901                          NULL, OBJ_PROP_LINK_DIRECT, errp);
1902 }
1903
1904 gchar *object_get_canonical_path_component(Object *obj)
1905 {
1906     ObjectProperty *prop = NULL;
1907     GHashTableIter iter;
1908
1909     if (obj->parent == NULL) {
1910         return NULL;
1911     }
1912
1913     g_hash_table_iter_init(&iter, obj->parent->properties);
1914     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1915         if (!object_property_is_child(prop)) {
1916             continue;
1917         }
1918
1919         if (prop->opaque == obj) {
1920             return g_strdup(prop->name);
1921         }
1922     }
1923
1924     /* obj had a parent but was not a child, should never happen */
1925     g_assert_not_reached();
1926     return NULL;
1927 }
1928
1929 gchar *object_get_canonical_path(Object *obj)
1930 {
1931     Object *root = object_get_root();
1932     char *newpath, *path = NULL;
1933
1934     if (obj == root) {
1935         return g_strdup("/");
1936     }
1937
1938     do {
1939         char *component = object_get_canonical_path_component(obj);
1940
1941         if (!component) {
1942             /* A canonical path must be complete, so discard what was
1943              * collected so far.
1944              */
1945             g_free(path);
1946             return NULL;
1947         }
1948
1949         newpath = g_strdup_printf("/%s%s", component, path ? path : "");
1950         g_free(path);
1951         g_free(component);
1952         path = newpath;
1953         obj = obj->parent;
1954     } while (obj != root);
1955
1956     return path;
1957 }
1958
1959 Object *object_resolve_path_component(Object *parent, const gchar *part)
1960 {
1961     ObjectProperty *prop = object_property_find(parent, part, NULL);
1962     if (prop == NULL) {
1963         return NULL;
1964     }
1965
1966     if (prop->resolve) {
1967         return prop->resolve(parent, prop->opaque, part);
1968     } else {
1969         return NULL;
1970     }
1971 }
1972
1973 static Object *object_resolve_abs_path(Object *parent,
1974                                           gchar **parts,
1975                                           const char *typename,
1976                                           int index)
1977 {
1978     Object *child;
1979
1980     if (parts[index] == NULL) {
1981         return object_dynamic_cast(parent, typename);
1982     }
1983
1984     if (strcmp(parts[index], "") == 0) {
1985         return object_resolve_abs_path(parent, parts, typename, index + 1);
1986     }
1987
1988     child = object_resolve_path_component(parent, parts[index]);
1989     if (!child) {
1990         return NULL;
1991     }
1992
1993     return object_resolve_abs_path(child, parts, typename, index + 1);
1994 }
1995
1996 static Object *object_resolve_partial_path(Object *parent,
1997                                               gchar **parts,
1998                                               const char *typename,
1999                                               bool *ambiguous)
2000 {
2001     Object *obj;
2002     GHashTableIter iter;
2003     ObjectProperty *prop;
2004
2005     obj = object_resolve_abs_path(parent, parts, typename, 0);
2006
2007     g_hash_table_iter_init(&iter, parent->properties);
2008     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2009         Object *found;
2010
2011         if (!object_property_is_child(prop)) {
2012             continue;
2013         }
2014
2015         found = object_resolve_partial_path(prop->opaque, parts,
2016                                             typename, ambiguous);
2017         if (found) {
2018             if (obj) {
2019                 *ambiguous = true;
2020                 return NULL;
2021             }
2022             obj = found;
2023         }
2024
2025         if (*ambiguous) {
2026             return NULL;
2027         }
2028     }
2029
2030     return obj;
2031 }
2032
2033 Object *object_resolve_path_type(const char *path, const char *typename,
2034                                  bool *ambiguousp)
2035 {
2036     Object *obj;
2037     gchar **parts;
2038
2039     parts = g_strsplit(path, "/", 0);
2040     assert(parts);
2041
2042     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2043         bool ambiguous = false;
2044         obj = object_resolve_partial_path(object_get_root(), parts,
2045                                           typename, &ambiguous);
2046         if (ambiguousp) {
2047             *ambiguousp = ambiguous;
2048         }
2049     } else {
2050         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
2051     }
2052
2053     g_strfreev(parts);
2054
2055     return obj;
2056 }
2057
2058 Object *object_resolve_path(const char *path, bool *ambiguous)
2059 {
2060     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2061 }
2062
2063 typedef struct StringProperty
2064 {
2065     char *(*get)(Object *, Error **);
2066     void (*set)(Object *, const char *, Error **);
2067 } StringProperty;
2068
2069 static void property_get_str(Object *obj, Visitor *v, const char *name,
2070                              void *opaque, Error **errp)
2071 {
2072     StringProperty *prop = opaque;
2073     char *value;
2074     Error *err = NULL;
2075
2076     value = prop->get(obj, &err);
2077     if (err) {
2078         error_propagate(errp, err);
2079         return;
2080     }
2081
2082     visit_type_str(v, name, &value, errp);
2083     g_free(value);
2084 }
2085
2086 static void property_set_str(Object *obj, Visitor *v, const char *name,
2087                              void *opaque, Error **errp)
2088 {
2089     StringProperty *prop = opaque;
2090     char *value;
2091     Error *local_err = NULL;
2092
2093     visit_type_str(v, name, &value, &local_err);
2094     if (local_err) {
2095         error_propagate(errp, local_err);
2096         return;
2097     }
2098
2099     prop->set(obj, value, errp);
2100     g_free(value);
2101 }
2102
2103 static void property_release_str(Object *obj, const char *name,
2104                                  void *opaque)
2105 {
2106     StringProperty *prop = opaque;
2107     g_free(prop);
2108 }
2109
2110 void object_property_add_str(Object *obj, const char *name,
2111                            char *(*get)(Object *, Error **),
2112                            void (*set)(Object *, const char *, Error **),
2113                            Error **errp)
2114 {
2115     Error *local_err = NULL;
2116     StringProperty *prop = g_malloc0(sizeof(*prop));
2117
2118     prop->get = get;
2119     prop->set = set;
2120
2121     object_property_add(obj, name, "string",
2122                         get ? property_get_str : NULL,
2123                         set ? property_set_str : NULL,
2124                         property_release_str,
2125                         prop, &local_err);
2126     if (local_err) {
2127         error_propagate(errp, local_err);
2128         g_free(prop);
2129     }
2130 }
2131
2132 ObjectProperty *
2133 object_class_property_add_str(ObjectClass *klass, const char *name,
2134                                    char *(*get)(Object *, Error **),
2135                                    void (*set)(Object *, const char *,
2136                                                Error **),
2137                                    Error **errp)
2138 {
2139     Error *local_err = NULL;
2140     StringProperty *prop = g_malloc0(sizeof(*prop));
2141     ObjectProperty *rv;
2142
2143     prop->get = get;
2144     prop->set = set;
2145
2146     rv = object_class_property_add(klass, name, "string",
2147                               get ? property_get_str : NULL,
2148                               set ? property_set_str : NULL,
2149                               NULL,
2150                               prop, &local_err);
2151     if (local_err) {
2152         error_propagate(errp, local_err);
2153         g_free(prop);
2154     }
2155
2156     return rv;
2157 }
2158
2159 typedef struct BoolProperty
2160 {
2161     bool (*get)(Object *, Error **);
2162     void (*set)(Object *, bool, Error **);
2163 } BoolProperty;
2164
2165 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2166                               void *opaque, Error **errp)
2167 {
2168     BoolProperty *prop = opaque;
2169     bool value;
2170     Error *err = NULL;
2171
2172     value = prop->get(obj, &err);
2173     if (err) {
2174         error_propagate(errp, err);
2175         return;
2176     }
2177
2178     visit_type_bool(v, name, &value, errp);
2179 }
2180
2181 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2182                               void *opaque, Error **errp)
2183 {
2184     BoolProperty *prop = opaque;
2185     bool value;
2186     Error *local_err = NULL;
2187
2188     visit_type_bool(v, name, &value, &local_err);
2189     if (local_err) {
2190         error_propagate(errp, local_err);
2191         return;
2192     }
2193
2194     prop->set(obj, value, errp);
2195 }
2196
2197 static void property_release_bool(Object *obj, const char *name,
2198                                   void *opaque)
2199 {
2200     BoolProperty *prop = opaque;
2201     g_free(prop);
2202 }
2203
2204 void object_property_add_bool(Object *obj, const char *name,
2205                               bool (*get)(Object *, Error **),
2206                               void (*set)(Object *, bool, Error **),
2207                               Error **errp)
2208 {
2209     Error *local_err = NULL;
2210     BoolProperty *prop = g_malloc0(sizeof(*prop));
2211
2212     prop->get = get;
2213     prop->set = set;
2214
2215     object_property_add(obj, name, "bool",
2216                         get ? property_get_bool : NULL,
2217                         set ? property_set_bool : NULL,
2218                         property_release_bool,
2219                         prop, &local_err);
2220     if (local_err) {
2221         error_propagate(errp, local_err);
2222         g_free(prop);
2223     }
2224 }
2225
2226 ObjectProperty *
2227 object_class_property_add_bool(ObjectClass *klass, const char *name,
2228                                     bool (*get)(Object *, Error **),
2229                                     void (*set)(Object *, bool, Error **),
2230                                     Error **errp)
2231 {
2232     Error *local_err = NULL;
2233     BoolProperty *prop = g_malloc0(sizeof(*prop));
2234     ObjectProperty *rv;
2235
2236     prop->get = get;
2237     prop->set = set;
2238
2239     rv = object_class_property_add(klass, name, "bool",
2240                               get ? property_get_bool : NULL,
2241                               set ? property_set_bool : NULL,
2242                               NULL,
2243                               prop, &local_err);
2244     if (local_err) {
2245         error_propagate(errp, local_err);
2246         g_free(prop);
2247     }
2248
2249     return rv;
2250 }
2251
2252 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2253                               void *opaque, Error **errp)
2254 {
2255     EnumProperty *prop = opaque;
2256     int value;
2257     Error *err = NULL;
2258
2259     value = prop->get(obj, &err);
2260     if (err) {
2261         error_propagate(errp, err);
2262         return;
2263     }
2264
2265     visit_type_enum(v, name, &value, prop->lookup, errp);
2266 }
2267
2268 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2269                               void *opaque, Error **errp)
2270 {
2271     EnumProperty *prop = opaque;
2272     int value;
2273     Error *err = NULL;
2274
2275     visit_type_enum(v, name, &value, prop->lookup, &err);
2276     if (err) {
2277         error_propagate(errp, err);
2278         return;
2279     }
2280     prop->set(obj, value, errp);
2281 }
2282
2283 static void property_release_enum(Object *obj, const char *name,
2284                                   void *opaque)
2285 {
2286     EnumProperty *prop = opaque;
2287     g_free(prop);
2288 }
2289
2290 void object_property_add_enum(Object *obj, const char *name,
2291                               const char *typename,
2292                               const QEnumLookup *lookup,
2293                               int (*get)(Object *, Error **),
2294                               void (*set)(Object *, int, Error **),
2295                               Error **errp)
2296 {
2297     Error *local_err = NULL;
2298     EnumProperty *prop = g_malloc(sizeof(*prop));
2299
2300     prop->lookup = lookup;
2301     prop->get = get;
2302     prop->set = set;
2303
2304     object_property_add(obj, name, typename,
2305                         get ? property_get_enum : NULL,
2306                         set ? property_set_enum : NULL,
2307                         property_release_enum,
2308                         prop, &local_err);
2309     if (local_err) {
2310         error_propagate(errp, local_err);
2311         g_free(prop);
2312     }
2313 }
2314
2315 ObjectProperty *
2316 object_class_property_add_enum(ObjectClass *klass, const char *name,
2317                                     const char *typename,
2318                                     const QEnumLookup *lookup,
2319                                     int (*get)(Object *, Error **),
2320                                     void (*set)(Object *, int, Error **),
2321                                     Error **errp)
2322 {
2323     Error *local_err = NULL;
2324     EnumProperty *prop = g_malloc(sizeof(*prop));
2325     ObjectProperty *rv;
2326
2327     prop->lookup = lookup;
2328     prop->get = get;
2329     prop->set = set;
2330
2331     rv = object_class_property_add(klass, name, typename,
2332                               get ? property_get_enum : NULL,
2333                               set ? property_set_enum : NULL,
2334                               NULL,
2335                               prop, &local_err);
2336     if (local_err) {
2337         error_propagate(errp, local_err);
2338         g_free(prop);
2339     }
2340
2341     return rv;
2342 }
2343
2344 typedef struct TMProperty {
2345     void (*get)(Object *, struct tm *, Error **);
2346 } TMProperty;
2347
2348 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2349                             void *opaque, Error **errp)
2350 {
2351     TMProperty *prop = opaque;
2352     Error *err = NULL;
2353     struct tm value;
2354
2355     prop->get(obj, &value, &err);
2356     if (err) {
2357         goto out;
2358     }
2359
2360     visit_start_struct(v, name, NULL, 0, &err);
2361     if (err) {
2362         goto out;
2363     }
2364     visit_type_int32(v, "tm_year", &value.tm_year, &err);
2365     if (err) {
2366         goto out_end;
2367     }
2368     visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
2369     if (err) {
2370         goto out_end;
2371     }
2372     visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
2373     if (err) {
2374         goto out_end;
2375     }
2376     visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
2377     if (err) {
2378         goto out_end;
2379     }
2380     visit_type_int32(v, "tm_min", &value.tm_min, &err);
2381     if (err) {
2382         goto out_end;
2383     }
2384     visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
2385     if (err) {
2386         goto out_end;
2387     }
2388     visit_check_struct(v, &err);
2389 out_end:
2390     visit_end_struct(v, NULL);
2391 out:
2392     error_propagate(errp, err);
2393
2394 }
2395
2396 static void property_release_tm(Object *obj, const char *name,
2397                                 void *opaque)
2398 {
2399     TMProperty *prop = opaque;
2400     g_free(prop);
2401 }
2402
2403 void object_property_add_tm(Object *obj, const char *name,
2404                             void (*get)(Object *, struct tm *, Error **),
2405                             Error **errp)
2406 {
2407     Error *local_err = NULL;
2408     TMProperty *prop = g_malloc0(sizeof(*prop));
2409
2410     prop->get = get;
2411
2412     object_property_add(obj, name, "struct tm",
2413                         get ? property_get_tm : NULL, NULL,
2414                         property_release_tm,
2415                         prop, &local_err);
2416     if (local_err) {
2417         error_propagate(errp, local_err);
2418         g_free(prop);
2419     }
2420 }
2421
2422 ObjectProperty *
2423 object_class_property_add_tm(ObjectClass *klass, const char *name,
2424                                   void (*get)(Object *, struct tm *, Error **),
2425                                   Error **errp)
2426 {
2427     Error *local_err = NULL;
2428     TMProperty *prop = g_malloc0(sizeof(*prop));
2429     ObjectProperty *rv;
2430
2431     prop->get = get;
2432
2433     rv = object_class_property_add(klass, name, "struct tm",
2434                               get ? property_get_tm : NULL, NULL,
2435                               NULL,
2436                               prop, &local_err);
2437     if (local_err) {
2438         error_propagate(errp, local_err);
2439         g_free(prop);
2440     }
2441
2442     return rv;
2443 }
2444
2445 static char *qdev_get_type(Object *obj, Error **errp)
2446 {
2447     return g_strdup(object_get_typename(obj));
2448 }
2449
2450 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2451                                    void *opaque, Error **errp)
2452 {
2453     uint8_t value = *(uint8_t *)opaque;
2454     visit_type_uint8(v, name, &value, errp);
2455 }
2456
2457 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2458                                     void *opaque, Error **errp)
2459 {
2460     uint16_t value = *(uint16_t *)opaque;
2461     visit_type_uint16(v, name, &value, errp);
2462 }
2463
2464 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2465                                     void *opaque, Error **errp)
2466 {
2467     uint32_t value = *(uint32_t *)opaque;
2468     visit_type_uint32(v, name, &value, errp);
2469 }
2470
2471 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2472                                     void *opaque, Error **errp)
2473 {
2474     uint64_t value = *(uint64_t *)opaque;
2475     visit_type_uint64(v, name, &value, errp);
2476 }
2477
2478 void object_property_add_uint8_ptr(Object *obj, const char *name,
2479                                    const uint8_t *v, Error **errp)
2480 {
2481     object_property_add(obj, name, "uint8", property_get_uint8_ptr,
2482                         NULL, NULL, (void *)v, errp);
2483 }
2484
2485 ObjectProperty *
2486 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2487                                          const uint8_t *v, Error **errp)
2488 {
2489     return object_class_property_add(klass, name, "uint8",
2490                                      property_get_uint8_ptr,
2491                                      NULL, NULL, (void *)v, errp);
2492 }
2493
2494 void object_property_add_uint16_ptr(Object *obj, const char *name,
2495                                     const uint16_t *v, Error **errp)
2496 {
2497     object_property_add(obj, name, "uint16", property_get_uint16_ptr,
2498                         NULL, NULL, (void *)v, errp);
2499 }
2500
2501 ObjectProperty *
2502 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2503                                           const uint16_t *v, Error **errp)
2504 {
2505     return object_class_property_add(klass, name, "uint16",
2506                                      property_get_uint16_ptr,
2507                                      NULL, NULL, (void *)v, errp);
2508 }
2509
2510 void object_property_add_uint32_ptr(Object *obj, const char *name,
2511                                     const uint32_t *v, Error **errp)
2512 {
2513     object_property_add(obj, name, "uint32", property_get_uint32_ptr,
2514                         NULL, NULL, (void *)v, errp);
2515 }
2516
2517 ObjectProperty *
2518 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2519                                           const uint32_t *v, Error **errp)
2520 {
2521     return object_class_property_add(klass, name, "uint32",
2522                                      property_get_uint32_ptr,
2523                                      NULL, NULL, (void *)v, errp);
2524 }
2525
2526 void object_property_add_uint64_ptr(Object *obj, const char *name,
2527                                     const uint64_t *v, Error **errp)
2528 {
2529     object_property_add(obj, name, "uint64", property_get_uint64_ptr,
2530                         NULL, NULL, (void *)v, errp);
2531 }
2532
2533 ObjectProperty *
2534 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2535                                           const uint64_t *v, Error **errp)
2536 {
2537     return object_class_property_add(klass, name, "uint64",
2538                                      property_get_uint64_ptr,
2539                                      NULL, NULL, (void *)v, errp);
2540 }
2541
2542 typedef struct {
2543     Object *target_obj;
2544     char *target_name;
2545 } AliasProperty;
2546
2547 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2548                                void *opaque, Error **errp)
2549 {
2550     AliasProperty *prop = opaque;
2551
2552     object_property_get(prop->target_obj, v, prop->target_name, errp);
2553 }
2554
2555 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2556                                void *opaque, Error **errp)
2557 {
2558     AliasProperty *prop = opaque;
2559
2560     object_property_set(prop->target_obj, v, prop->target_name, errp);
2561 }
2562
2563 static Object *property_resolve_alias(Object *obj, void *opaque,
2564                                       const gchar *part)
2565 {
2566     AliasProperty *prop = opaque;
2567
2568     return object_resolve_path_component(prop->target_obj, prop->target_name);
2569 }
2570
2571 static void property_release_alias(Object *obj, const char *name, void *opaque)
2572 {
2573     AliasProperty *prop = opaque;
2574
2575     g_free(prop->target_name);
2576     g_free(prop);
2577 }
2578
2579 void object_property_add_alias(Object *obj, const char *name,
2580                                Object *target_obj, const char *target_name,
2581                                Error **errp)
2582 {
2583     AliasProperty *prop;
2584     ObjectProperty *op;
2585     ObjectProperty *target_prop;
2586     gchar *prop_type;
2587     Error *local_err = NULL;
2588
2589     target_prop = object_property_find(target_obj, target_name, errp);
2590     if (!target_prop) {
2591         return;
2592     }
2593
2594     if (object_property_is_child(target_prop)) {
2595         prop_type = g_strdup_printf("link%s",
2596                                     target_prop->type + strlen("child"));
2597     } else {
2598         prop_type = g_strdup(target_prop->type);
2599     }
2600
2601     prop = g_malloc(sizeof(*prop));
2602     prop->target_obj = target_obj;
2603     prop->target_name = g_strdup(target_name);
2604
2605     op = object_property_add(obj, name, prop_type,
2606                              property_get_alias,
2607                              property_set_alias,
2608                              property_release_alias,
2609                              prop, &local_err);
2610     if (local_err) {
2611         error_propagate(errp, local_err);
2612         g_free(prop);
2613         goto out;
2614     }
2615     op->resolve = property_resolve_alias;
2616     if (target_prop->defval) {
2617         op->defval = qobject_ref(target_prop->defval);
2618     }
2619
2620     object_property_set_description(obj, op->name,
2621                                     target_prop->description,
2622                                     &error_abort);
2623
2624 out:
2625     g_free(prop_type);
2626 }
2627
2628 void object_property_set_description(Object *obj, const char *name,
2629                                      const char *description, Error **errp)
2630 {
2631     ObjectProperty *op;
2632
2633     op = object_property_find(obj, name, errp);
2634     if (!op) {
2635         return;
2636     }
2637
2638     g_free(op->description);
2639     op->description = g_strdup(description);
2640 }
2641
2642 void object_class_property_set_description(ObjectClass *klass,
2643                                            const char *name,
2644                                            const char *description,
2645                                            Error **errp)
2646 {
2647     ObjectProperty *op;
2648
2649     op = g_hash_table_lookup(klass->properties, name);
2650     if (!op) {
2651         error_setg(errp, "Property '.%s' not found", name);
2652         return;
2653     }
2654
2655     g_free(op->description);
2656     op->description = g_strdup(description);
2657 }
2658
2659 static void object_class_init(ObjectClass *klass, void *data)
2660 {
2661     object_class_property_add_str(klass, "type", qdev_get_type,
2662                                   NULL, &error_abort);
2663 }
2664
2665 static void register_types(void)
2666 {
2667     static TypeInfo interface_info = {
2668         .name = TYPE_INTERFACE,
2669         .class_size = sizeof(InterfaceClass),
2670         .abstract = true,
2671     };
2672
2673     static TypeInfo object_info = {
2674         .name = TYPE_OBJECT,
2675         .instance_size = sizeof(Object),
2676         .class_init = object_class_init,
2677         .abstract = true,
2678     };
2679
2680     type_interface = type_register_internal(&interface_info);
2681     type_register_internal(&object_info);
2682 }
2683
2684 type_init(register_types)