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 "qom/object.h"
  14 #include "qom/object_interfaces.h"
  15 #include "qemu-common.h"
  16 #include "qapi/visitor.h"
  17 #include "qapi-visit.h"
  18 #include "qapi/string-input-visitor.h"
  19 #include "qapi/string-output-visitor.h"
  20 #include "qapi/qmp/qerror.h"
  21 #include "trace.h"
  22
  23 /* TODO: replace QObject with a simpler visitor to avoid a dependency
  24  * of the QOM core on QObject?  */
  25 #include "qom/qom-qobject.h"
  26 #include "qapi/qmp/qobject.h"
  27 #include "qapi/qmp/qbool.h"
  28 #include "qapi/qmp/qint.h"
  29 #include "qapi/qmp/qstring.h"
  30
  31 #define MAX_INTERFACES 32
  32
  33 typedef struct InterfaceImpl InterfaceImpl;
  34 typedef struct TypeImpl TypeImpl;
  35
  36 struct InterfaceImpl
  37 {
  38     const char *typename;
  39 };
  40
  41 struct TypeImpl
  42 {
  43     const char *name;
  44
  45     size_t class_size;
  46
  47     size_t instance_size;
  48
  49     void (*class_init)(ObjectClass *klass, void *data);
  50     void (*class_base_init)(ObjectClass *klass, void *data);
  51     void (*class_finalize)(ObjectClass *klass, void *data);
  52
  53     void *class_data;
  54
  55     void (*instance_init)(Object *obj);
  56     void (*instance_post_init)(Object *obj);
  57     void (*instance_finalize)(Object *obj);
  58
  59     bool abstract;
  60
  61     const char *parent;
  62     TypeImpl *parent_type;
  63
  64     ObjectClass *class;
  65
  66     int num_interfaces;
  67     InterfaceImpl interfaces[MAX_INTERFACES];
  68 };
  69
  70 struct ObjectPropertyIterator {
  71     GHashTableIter iter;
  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_finalize = info->class_finalize;
 121     ti->class_data = info->class_data;
 122
 123     ti->instance_init = info->instance_init;
 124     ti->instance_post_init = info->instance_post_init;
 125     ti->instance_finalize = info->instance_finalize;
 126
 127     ti->abstract = info->abstract;
 128
 129     for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
 130         ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
 131     }
 132     ti->num_interfaces = i;
 133
 134     return ti;
 135 }
 136
 137 static TypeImpl *type_register_internal(const TypeInfo *info)
 138 {
 139     TypeImpl *ti;
 140     ti = type_new(info);
 141
 142     type_table_add(ti);
 143     return ti;
 144 }
 145
 146 TypeImpl *type_register(const TypeInfo *info)
 147 {
 148     assert(info->parent);
 149     return type_register_internal(info);
 150 }
 151
 152 TypeImpl *type_register_static(const TypeInfo *info)
 153 {
 154     return type_register(info);
 155 }
 156
 157 static TypeImpl *type_get_by_name(const char *name)
 158 {
 159     if (name == NULL) {
 160         return NULL;
 161     }
 162
 163     return type_table_lookup(name);
 164 }
 165
 166 static TypeImpl *type_get_parent(TypeImpl *type)
 167 {
 168     if (!type->parent_type && type->parent) {
 169         type->parent_type = type_get_by_name(type->parent);
 170         g_assert(type->parent_type != NULL);
 171     }
 172
 173     return type->parent_type;
 174 }
 175
 176 static bool type_has_parent(TypeImpl *type)
 177 {
 178     return (type->parent != NULL);
 179 }
 180
 181 static size_t type_class_get_size(TypeImpl *ti)
 182 {
 183     if (ti->class_size) {
 184         return ti->class_size;
 185     }
 186
 187     if (type_has_parent(ti)) {
 188         return type_class_get_size(type_get_parent(ti));
 189     }
 190
 191     return sizeof(ObjectClass);
 192 }
 193
 194 static size_t type_object_get_size(TypeImpl *ti)
 195 {
 196     if (ti->instance_size) {
 197         return ti->instance_size;
 198     }
 199
 200     if (type_has_parent(ti)) {
 201         return type_object_get_size(type_get_parent(ti));
 202     }
 203
 204     return 0;
 205 }
 206
 207 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
 208 {
 209     assert(target_type);
 210
 211     /* Check if target_type is a direct ancestor of type */
 212     while (type) {
 213         if (type == target_type) {
 214             return true;
 215         }
 216
 217         type = type_get_parent(type);
 218     }
 219
 220     return false;
 221 }
 222
 223 static void type_initialize(TypeImpl *ti);
 224
 225 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
 226                                       TypeImpl *parent_type)
 227 {
 228     InterfaceClass *new_iface;
 229     TypeInfo info = { };
 230     TypeImpl *iface_impl;
 231
 232     info.parent = parent_type->name;
 233     info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
 234     info.abstract = true;
 235
 236     iface_impl = type_new(&info);
 237     iface_impl->parent_type = parent_type;
 238     type_initialize(iface_impl);
 239     g_free((char *)info.name);
 240
 241     new_iface = (InterfaceClass *)iface_impl->class;
 242     new_iface->concrete_class = ti->class;
 243     new_iface->interface_type = interface_type;
 244
 245     ti->class->interfaces = g_slist_append(ti->class->interfaces,
 246                                            iface_impl->class);
 247 }
 248
 249 static void type_initialize(TypeImpl *ti)
 250 {
 251     TypeImpl *parent;
 252
 253     if (ti->class) {
 254         return;
 255     }
 256
 257     ti->class_size = type_class_get_size(ti);
 258     ti->instance_size = type_object_get_size(ti);
 259
 260     ti->class = g_malloc0(ti->class_size);
 261
 262     parent = type_get_parent(ti);
 263     if (parent) {
 264         type_initialize(parent);
 265         GSList *e;
 266         int i;
 267
 268         g_assert_cmpint(parent->class_size, <=, ti->class_size);
 269         memcpy(ti->class, parent->class, parent->class_size);
 270         ti->class->interfaces = NULL;
 271
 272         for (e = parent->class->interfaces; e; e = e->next) {
 273             InterfaceClass *iface = e->data;
 274             ObjectClass *klass = OBJECT_CLASS(iface);
 275
 276             type_initialize_interface(ti, iface->interface_type, klass->type);
 277         }
 278
 279         for (i = 0; i < ti->num_interfaces; i++) {
 280             TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
 281             for (e = ti->class->interfaces; e; e = e->next) {
 282                 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
 283
 284                 if (type_is_ancestor(target_type, t)) {
 285                     break;
 286                 }
 287             }
 288
 289             if (e) {
 290                 continue;
 291             }
 292
 293             type_initialize_interface(ti, t, t);
 294         }
 295     }
 296
 297     ti->class->type = ti;
 298
 299     while (parent) {
 300         if (parent->class_base_init) {
 301             parent->class_base_init(ti->class, ti->class_data);
 302         }
 303         parent = type_get_parent(parent);
 304     }
 305
 306     if (ti->class_init) {
 307         ti->class_init(ti->class, ti->class_data);
 308     }
 309 }
 310
 311 static void object_init_with_type(Object *obj, TypeImpl *ti)
 312 {
 313     if (type_has_parent(ti)) {
 314         object_init_with_type(obj, type_get_parent(ti));
 315     }
 316
 317     if (ti->instance_init) {
 318         ti->instance_init(obj);
 319     }
 320 }
 321
 322 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
 323 {
 324     if (ti->instance_post_init) {
 325         ti->instance_post_init(obj);
 326     }
 327
 328     if (type_has_parent(ti)) {
 329         object_post_init_with_type(obj, type_get_parent(ti));
 330     }
 331 }
 332
 333 static void object_property_free(gpointer data)
 334 {
 335     ObjectProperty *prop = data;
 336
 337     g_free(prop->name);
 338     g_free(prop->type);
 339     g_free(prop->description);
 340     g_free(prop);
 341 }
 342
 343 void object_initialize_with_type(void *data, size_t size, TypeImpl *type)
 344 {
 345     Object *obj = data;
 346
 347     g_assert(type != NULL);
 348     type_initialize(type);
 349
 350     g_assert_cmpint(type->instance_size, >=, sizeof(Object));
 351     g_assert(type->abstract == false);
 352     g_assert_cmpint(size, >=, type->instance_size);
 353
 354     memset(obj, 0, type->instance_size);
 355     obj->class = type->class;
 356     object_ref(obj);
 357     obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
 358                                             NULL, object_property_free);
 359     object_init_with_type(obj, type);
 360     object_post_init_with_type(obj, type);
 361 }
 362
 363 void object_initialize(void *data, size_t size, const char *typename)
 364 {
 365     TypeImpl *type = type_get_by_name(typename);
 366
 367     object_initialize_with_type(data, size, type);
 368 }
 369
 370 static inline bool object_property_is_child(ObjectProperty *prop)
 371 {
 372     return strstart(prop->type, "child<", NULL);
 373 }
 374
 375 static void object_property_del_all(Object *obj)
 376 {
 377     ObjectProperty *prop;
 378     GHashTableIter iter;
 379     gpointer key, value;
 380     bool released;
 381
 382     do {
 383         released = false;
 384         g_hash_table_iter_init(&iter, obj->properties);
 385         while (g_hash_table_iter_next(&iter, &key, &value)) {
 386             prop = value;
 387             if (prop->release) {
 388                 prop->release(obj, prop->name, prop->opaque);
 389                 prop->release = NULL;
 390                 released = true;
 391                 break;
 392             }
 393             g_hash_table_iter_remove(&iter);
 394         }
 395     } while (released);
 396
 397     g_hash_table_unref(obj->properties);
 398 }
 399
 400 static void object_property_del_child(Object *obj, Object *child, Error **errp)
 401 {
 402     ObjectProperty *prop;
 403     GHashTableIter iter;
 404     gpointer key, value;
 405
 406     g_hash_table_iter_init(&iter, obj->properties);
 407     while (g_hash_table_iter_next(&iter, &key, &value)) {
 408         prop = value;
 409         if (object_property_is_child(prop) && prop->opaque == child) {
 410             if (prop->release) {
 411                 prop->release(obj, prop->name, prop->opaque);
 412                 prop->release = NULL;
 413             }
 414             break;
 415         }
 416     }
 417     g_hash_table_iter_init(&iter, obj->properties);
 418     while (g_hash_table_iter_next(&iter, &key, &value)) {
 419         prop = value;
 420         if (object_property_is_child(prop) && prop->opaque == child) {
 421             g_hash_table_iter_remove(&iter);
 422             break;
 423         }
 424     }
 425 }
 426
 427 void object_unparent(Object *obj)
 428 {
 429     if (obj->parent) {
 430         object_property_del_child(obj->parent, obj, NULL);
 431     }
 432 }
 433
 434 static void object_deinit(Object *obj, TypeImpl *type)
 435 {
 436     if (type->instance_finalize) {
 437         type->instance_finalize(obj);
 438     }
 439
 440     if (type_has_parent(type)) {
 441         object_deinit(obj, type_get_parent(type));
 442     }
 443 }
 444
 445 static void object_finalize(void *data)
 446 {
 447     Object *obj = data;
 448     TypeImpl *ti = obj->class->type;
 449
 450     object_property_del_all(obj);
 451     object_deinit(obj, ti);
 452
 453     g_assert_cmpint(obj->ref, ==, 0);
 454     if (obj->free) {
 455         obj->free(obj);
 456     }
 457 }
 458
 459 Object *object_new_with_type(Type type)
 460 {
 461     Object *obj;
 462
 463     g_assert(type != NULL);
 464     type_initialize(type);
 465
 466     obj = g_malloc(type->instance_size);
 467     object_initialize_with_type(obj, type->instance_size, type);
 468     obj->free = g_free;
 469
 470     return obj;
 471 }
 472
 473 Object *object_new(const char *typename)
 474 {
 475     TypeImpl *ti = type_get_by_name(typename);
 476
 477     return object_new_with_type(ti);
 478 }
 479
 480
 481 Object *object_new_with_props(const char *typename,
 482                               Object *parent,
 483                               const char *id,
 484                               Error **errp,
 485                               ...)
 486 {
 487     va_list vargs;
 488     Object *obj;
 489
 490     va_start(vargs, errp);
 491     obj = object_new_with_propv(typename, parent, id, errp, vargs);
 492     va_end(vargs);
 493
 494     return obj;
 495 }
 496
 497
 498 Object *object_new_with_propv(const char *typename,
 499                               Object *parent,
 500                               const char *id,
 501                               Error **errp,
 502                               va_list vargs)
 503 {
 504     Object *obj;
 505     ObjectClass *klass;
 506     Error *local_err = NULL;
 507
 508     klass = object_class_by_name(typename);
 509     if (!klass) {
 510         error_setg(errp, "invalid object type: %s", typename);
 511         return NULL;
 512     }
 513
 514     if (object_class_is_abstract(klass)) {
 515         error_setg(errp, "object type '%s' is abstract", typename);
 516         return NULL;
 517     }
 518     obj = object_new(typename);
 519
 520     if (object_set_propv(obj, &local_err, vargs) < 0) {
 521         goto error;
 522     }
 523
 524     object_property_add_child(parent, id, obj, &local_err);
 525     if (local_err) {
 526         goto error;
 527     }
 528
 529     if (object_dynamic_cast(obj, TYPE_USER_CREATABLE)) {
 530         user_creatable_complete(obj, &local_err);
 531         if (local_err) {
 532             object_unparent(obj);
 533             goto error;
 534         }
 535     }
 536
 537     object_unref(OBJECT(obj));
 538     return obj;
 539
 540  error:
 541     if (local_err) {
 542         error_propagate(errp, local_err);
 543     }
 544     object_unref(obj);
 545     return NULL;
 546 }
 547
 548
 549 int object_set_props(Object *obj,
 550                      Error **errp,
 551                      ...)
 552 {
 553     va_list vargs;
 554     int ret;
 555
 556     va_start(vargs, errp);
 557     ret = object_set_propv(obj, errp, vargs);
 558     va_end(vargs);
 559
 560     return ret;
 561 }
 562
 563
 564 int object_set_propv(Object *obj,
 565                      Error **errp,
 566                      va_list vargs)
 567 {
 568     const char *propname;
 569     Error *local_err = NULL;
 570
 571     propname = va_arg(vargs, char *);
 572     while (propname != NULL) {
 573         const char *value = va_arg(vargs, char *);
 574
 575         g_assert(value != NULL);
 576         object_property_parse(obj, value, propname, &local_err);
 577         if (local_err) {
 578             error_propagate(errp, local_err);
 579             return -1;
 580         }
 581         propname = va_arg(vargs, char *);
 582     }
 583
 584     return 0;
 585 }
 586
 587
 588 Object *object_dynamic_cast(Object *obj, const char *typename)
 589 {
 590     if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
 591         return obj;
 592     }
 593
 594     return NULL;
 595 }
 596
 597 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
 598                                    const char *file, int line, const char *func)
 599 {
 600     trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
 601                                      typename, file, line, func);
 602
 603 #ifdef CONFIG_QOM_CAST_DEBUG
 604     int i;
 605     Object *inst;
 606
 607     for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
 608         if (obj->class->object_cast_cache[i] == typename) {
 609             goto out;
 610         }
 611     }
 612
 613     inst = object_dynamic_cast(obj, typename);
 614
 615     if (!inst && obj) {
 616         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 617                 file, line, func, obj, typename);
 618         abort();
 619     }
 620
 621     assert(obj == inst);
 622
 623     if (obj && obj == inst) {
 624         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 625             obj->class->object_cast_cache[i - 1] =
 626                     obj->class->object_cast_cache[i];
 627         }
 628         obj->class->object_cast_cache[i - 1] = typename;
 629     }
 630
 631 out:
 632 #endif
 633     return obj;
 634 }
 635
 636 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
 637                                        const char *typename)
 638 {
 639     ObjectClass *ret = NULL;
 640     TypeImpl *target_type;
 641     TypeImpl *type;
 642
 643     if (!class) {
 644         return NULL;
 645     }
 646
 647     /* A simple fast path that can trigger a lot for leaf classes.  */
 648     type = class->type;
 649     if (type->name == typename) {
 650         return class;
 651     }
 652
 653     target_type = type_get_by_name(typename);
 654     if (!target_type) {
 655         /* target class type unknown, so fail the cast */
 656         return NULL;
 657     }
 658
 659     if (type->class->interfaces &&
 660             type_is_ancestor(target_type, type_interface)) {
 661         int found = 0;
 662         GSList *i;
 663
 664         for (i = class->interfaces; i; i = i->next) {
 665             ObjectClass *target_class = i->data;
 666
 667             if (type_is_ancestor(target_class->type, target_type)) {
 668                 ret = target_class;
 669                 found++;
 670             }
 671          }
 672
 673         /* The match was ambiguous, don't allow a cast */
 674         if (found > 1) {
 675             ret = NULL;
 676         }
 677     } else if (type_is_ancestor(type, target_type)) {
 678         ret = class;
 679     }
 680
 681     return ret;
 682 }
 683
 684 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
 685                                               const char *typename,
 686                                               const char *file, int line,
 687                                               const char *func)
 688 {
 689     ObjectClass *ret;
 690
 691     trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
 692                                            typename, file, line, func);
 693
 694 #ifdef CONFIG_QOM_CAST_DEBUG
 695     int i;
 696
 697     for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
 698         if (class->class_cast_cache[i] == typename) {
 699             ret = class;
 700             goto out;
 701         }
 702     }
 703 #else
 704     if (!class || !class->interfaces) {
 705         return class;
 706     }
 707 #endif
 708
 709     ret = object_class_dynamic_cast(class, typename);
 710     if (!ret && class) {
 711         fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
 712                 file, line, func, class, typename);
 713         abort();
 714     }
 715
 716 #ifdef CONFIG_QOM_CAST_DEBUG
 717     if (class && ret == class) {
 718         for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
 719             class->class_cast_cache[i - 1] = class->class_cast_cache[i];
 720         }
 721         class->class_cast_cache[i - 1] = typename;
 722     }
 723 out:
 724 #endif
 725     return ret;
 726 }
 727
 728 const char *object_get_typename(Object *obj)
 729 {
 730     return obj->class->type->name;
 731 }
 732
 733 ObjectClass *object_get_class(Object *obj)
 734 {
 735     return obj->class;
 736 }
 737
 738 bool object_class_is_abstract(ObjectClass *klass)
 739 {
 740     return klass->type->abstract;
 741 }
 742
 743 const char *object_class_get_name(ObjectClass *klass)
 744 {
 745     return klass->type->name;
 746 }
 747
 748 ObjectClass *object_class_by_name(const char *typename)
 749 {
 750     TypeImpl *type = type_get_by_name(typename);
 751
 752     if (!type) {
 753         return NULL;
 754     }
 755
 756     type_initialize(type);
 757
 758     return type->class;
 759 }
 760
 761 ObjectClass *object_class_get_parent(ObjectClass *class)
 762 {
 763     TypeImpl *type = type_get_parent(class->type);
 764
 765     if (!type) {
 766         return NULL;
 767     }
 768
 769     type_initialize(type);
 770
 771     return type->class;
 772 }
 773
 774 typedef struct OCFData
 775 {
 776     void (*fn)(ObjectClass *klass, void *opaque);
 777     const char *implements_type;
 778     bool include_abstract;
 779     void *opaque;
 780 } OCFData;
 781
 782 static void object_class_foreach_tramp(gpointer key, gpointer value,
 783                                        gpointer opaque)
 784 {
 785     OCFData *data = opaque;
 786     TypeImpl *type = value;
 787     ObjectClass *k;
 788
 789     type_initialize(type);
 790     k = type->class;
 791
 792     if (!data->include_abstract && type->abstract) {
 793         return;
 794     }
 795
 796     if (data->implements_type &&
 797         !object_class_dynamic_cast(k, data->implements_type)) {
 798         return;
 799     }
 800
 801     data->fn(k, data->opaque);
 802 }
 803
 804 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
 805                           const char *implements_type, bool include_abstract,
 806                           void *opaque)
 807 {
 808     OCFData data = { fn, implements_type, include_abstract, opaque };
 809
 810     enumerating_types = true;
 811     g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
 812     enumerating_types = false;
 813 }
 814
 815 static int do_object_child_foreach(Object *obj,
 816                                    int (*fn)(Object *child, void *opaque),
 817                                    void *opaque, bool recurse)
 818 {
 819     GHashTableIter iter;
 820     ObjectProperty *prop;
 821     int ret = 0;
 822
 823     g_hash_table_iter_init(&iter, obj->properties);
 824     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
 825         if (object_property_is_child(prop)) {
 826             Object *child = prop->opaque;
 827
 828             ret = fn(child, opaque);
 829             if (ret != 0) {
 830                 break;
 831             }
 832             if (recurse) {
 833                 do_object_child_foreach(child, fn, opaque, true);
 834             }
 835         }
 836     }
 837     return ret;
 838 }
 839
 840 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
 841                          void *opaque)
 842 {
 843     return do_object_child_foreach(obj, fn, opaque, false);
 844 }
 845
 846 int object_child_foreach_recursive(Object *obj,
 847                                    int (*fn)(Object *child, void *opaque),
 848                                    void *opaque)
 849 {
 850     return do_object_child_foreach(obj, fn, opaque, true);
 851 }
 852
 853 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
 854 {
 855     GSList **list = opaque;
 856
 857     *list = g_slist_prepend(*list, klass);
 858 }
 859
 860 GSList *object_class_get_list(const char *implements_type,
 861                               bool include_abstract)
 862 {
 863     GSList *list = NULL;
 864
 865     object_class_foreach(object_class_get_list_tramp,
 866                          implements_type, include_abstract, &list);
 867     return list;
 868 }
 869
 870 void object_ref(Object *obj)
 871 {
 872     if (!obj) {
 873         return;
 874     }
 875     atomic_inc(&obj->ref);
 876 }
 877
 878 void object_unref(Object *obj)
 879 {
 880     if (!obj) {
 881         return;
 882     }
 883     g_assert_cmpint(obj->ref, >, 0);
 884
 885     /* parent always holds a reference to its children */
 886     if (atomic_fetch_dec(&obj->ref) == 1) {
 887         object_finalize(obj);
 888     }
 889 }
 890
 891 ObjectProperty *
 892 object_property_add(Object *obj, const char *name, const char *type,
 893                     ObjectPropertyAccessor *get,
 894                     ObjectPropertyAccessor *set,
 895                     ObjectPropertyRelease *release,
 896                     void *opaque, Error **errp)
 897 {
 898     ObjectProperty *prop;
 899     size_t name_len = strlen(name);
 900
 901     if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
 902         int i;
 903         ObjectProperty *ret;
 904         char *name_no_array = g_strdup(name);
 905
 906         name_no_array[name_len - 3] = '\0';
 907         for (i = 0; ; ++i) {
 908             char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
 909
 910             ret = object_property_add(obj, full_name, type, get, set,
 911                                       release, opaque, NULL);
 912             g_free(full_name);
 913             if (ret) {
 914                 break;
 915             }
 916         }
 917         g_free(name_no_array);
 918         return ret;
 919     }
 920
 921     if (g_hash_table_lookup(obj->properties, name) != NULL) {
 922         error_setg(errp, "attempt to add duplicate property '%s'"
 923                        " to object (type '%s')", name,
 924                        object_get_typename(obj));
 925         return NULL;
 926     }
 927
 928     prop = g_malloc0(sizeof(*prop));
 929
 930     prop->name = g_strdup(name);
 931     prop->type = g_strdup(type);
 932
 933     prop->get = get;
 934     prop->set = set;
 935     prop->release = release;
 936     prop->opaque = opaque;
 937
 938     g_hash_table_insert(obj->properties, prop->name, prop);
 939     return prop;
 940 }
 941
 942 ObjectProperty *object_property_find(Object *obj, const char *name,
 943                                      Error **errp)
 944 {
 945     ObjectProperty *prop;
 946
 947     prop = g_hash_table_lookup(obj->properties, name);
 948     if (prop) {
 949         return prop;
 950     }
 951
 952     error_setg(errp, "Property '.%s' not found", name);
 953     return NULL;
 954 }
 955
 956 ObjectPropertyIterator *object_property_iter_init(Object *obj)
 957 {
 958     ObjectPropertyIterator *ret = g_new0(ObjectPropertyIterator, 1);
 959     g_hash_table_iter_init(&ret->iter, obj->properties);
 960     return ret;
 961 }
 962
 963 void object_property_iter_free(ObjectPropertyIterator *iter)
 964 {
 965     if (!iter) {
 966         return;
 967     }
 968     g_free(iter);
 969 }
 970
 971 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
 972 {
 973     gpointer key, val;
 974     if (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
 975         return NULL;
 976     }
 977     return val;
 978 }
 979
 980 void object_property_del(Object *obj, const char *name, Error **errp)
 981 {
 982     ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
 983
 984     if (!prop) {
 985         error_setg(errp, "Property '.%s' not found", name);
 986         return;
 987     }
 988
 989     if (prop->release) {
 990         prop->release(obj, name, prop->opaque);
 991     }
 992     g_hash_table_remove(obj->properties, name);
 993 }
 994
 995 void object_property_get(Object *obj, Visitor *v, const char *name,
 996                          Error **errp)
 997 {
 998     ObjectProperty *prop = object_property_find(obj, name, errp);
 999     if (prop == NULL) {
1000         return;
1001     }
1002
1003     if (!prop->get) {
1004         error_setg(errp, QERR_PERMISSION_DENIED);
1005     } else {
1006         prop->get(obj, v, prop->opaque, name, errp);
1007     }
1008 }
1009
1010 void object_property_set(Object *obj, Visitor *v, const char *name,
1011                          Error **errp)
1012 {
1013     ObjectProperty *prop = object_property_find(obj, name, errp);
1014     if (prop == NULL) {
1015         return;
1016     }
1017
1018     if (!prop->set) {
1019         error_setg(errp, QERR_PERMISSION_DENIED);
1020     } else {
1021         prop->set(obj, v, prop->opaque, name, errp);
1022     }
1023 }
1024
1025 void object_property_set_str(Object *obj, const char *value,
1026                              const char *name, Error **errp)
1027 {
1028     QString *qstr = qstring_from_str(value);
1029     object_property_set_qobject(obj, QOBJECT(qstr), name, errp);
1030
1031     QDECREF(qstr);
1032 }
1033
1034 char *object_property_get_str(Object *obj, const char *name,
1035                               Error **errp)
1036 {
1037     QObject *ret = object_property_get_qobject(obj, name, errp);
1038     QString *qstring;
1039     char *retval;
1040
1041     if (!ret) {
1042         return NULL;
1043     }
1044     qstring = qobject_to_qstring(ret);
1045     if (!qstring) {
1046         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1047         retval = NULL;
1048     } else {
1049         retval = g_strdup(qstring_get_str(qstring));
1050     }
1051
1052     QDECREF(qstring);
1053     return retval;
1054 }
1055
1056 void object_property_set_link(Object *obj, Object *value,
1057                               const char *name, Error **errp)
1058 {
1059     if (value) {
1060         gchar *path = object_get_canonical_path(value);
1061         object_property_set_str(obj, path, name, errp);
1062         g_free(path);
1063     } else {
1064         object_property_set_str(obj, "", name, errp);
1065     }
1066 }
1067
1068 Object *object_property_get_link(Object *obj, const char *name,
1069                                  Error **errp)
1070 {
1071     char *str = object_property_get_str(obj, name, errp);
1072     Object *target = NULL;
1073
1074     if (str && *str) {
1075         target = object_resolve_path(str, NULL);
1076         if (!target) {
1077             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1078                       "Device '%s' not found", str);
1079         }
1080     }
1081
1082     g_free(str);
1083     return target;
1084 }
1085
1086 void object_property_set_bool(Object *obj, bool value,
1087                               const char *name, Error **errp)
1088 {
1089     QBool *qbool = qbool_from_bool(value);
1090     object_property_set_qobject(obj, QOBJECT(qbool), name, errp);
1091
1092     QDECREF(qbool);
1093 }
1094
1095 bool object_property_get_bool(Object *obj, const char *name,
1096                               Error **errp)
1097 {
1098     QObject *ret = object_property_get_qobject(obj, name, errp);
1099     QBool *qbool;
1100     bool retval;
1101
1102     if (!ret) {
1103         return false;
1104     }
1105     qbool = qobject_to_qbool(ret);
1106     if (!qbool) {
1107         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1108         retval = false;
1109     } else {
1110         retval = qbool_get_bool(qbool);
1111     }
1112
1113     QDECREF(qbool);
1114     return retval;
1115 }
1116
1117 void object_property_set_int(Object *obj, int64_t value,
1118                              const char *name, Error **errp)
1119 {
1120     QInt *qint = qint_from_int(value);
1121     object_property_set_qobject(obj, QOBJECT(qint), name, errp);
1122
1123     QDECREF(qint);
1124 }
1125
1126 int64_t object_property_get_int(Object *obj, const char *name,
1127                                 Error **errp)
1128 {
1129     QObject *ret = object_property_get_qobject(obj, name, errp);
1130     QInt *qint;
1131     int64_t retval;
1132
1133     if (!ret) {
1134         return -1;
1135     }
1136     qint = qobject_to_qint(ret);
1137     if (!qint) {
1138         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1139         retval = -1;
1140     } else {
1141         retval = qint_get_int(qint);
1142     }
1143
1144     QDECREF(qint);
1145     return retval;
1146 }
1147
1148 typedef struct EnumProperty {
1149     const char * const *strings;
1150     int (*get)(Object *, Error **);
1151     void (*set)(Object *, int, Error **);
1152 } EnumProperty;
1153
1154 int object_property_get_enum(Object *obj, const char *name,
1155                              const char *typename, Error **errp)
1156 {
1157     Error *err = NULL;
1158     StringOutputVisitor *sov;
1159     StringInputVisitor *siv;
1160     char *str;
1161     int ret;
1162     ObjectProperty *prop = object_property_find(obj, name, errp);
1163     EnumProperty *enumprop;
1164
1165     if (prop == NULL) {
1166         return 0;
1167     }
1168
1169     if (!g_str_equal(prop->type, typename)) {
1170         error_setg(errp, "Property %s on %s is not '%s' enum type",
1171                    name, object_class_get_name(
1172                        object_get_class(obj)), typename);
1173         return 0;
1174     }
1175
1176     enumprop = prop->opaque;
1177
1178     sov = string_output_visitor_new(false);
1179     object_property_get(obj, string_output_get_visitor(sov), name, &err);
1180     if (err) {
1181         error_propagate(errp, err);
1182         string_output_visitor_cleanup(sov);
1183         return 0;
1184     }
1185     str = string_output_get_string(sov);
1186     siv = string_input_visitor_new(str);
1187     string_output_visitor_cleanup(sov);
1188     visit_type_enum(string_input_get_visitor(siv),
1189                     &ret, enumprop->strings, NULL, name, errp);
1190
1191     g_free(str);
1192     string_input_visitor_cleanup(siv);
1193
1194     return ret;
1195 }
1196
1197 void object_property_get_uint16List(Object *obj, const char *name,
1198                                     uint16List **list, Error **errp)
1199 {
1200     Error *err = NULL;
1201     StringOutputVisitor *ov;
1202     StringInputVisitor *iv;
1203     char *str;
1204
1205     ov = string_output_visitor_new(false);
1206     object_property_get(obj, string_output_get_visitor(ov),
1207                         name, &err);
1208     if (err) {
1209         error_propagate(errp, err);
1210         goto out;
1211     }
1212     str = string_output_get_string(ov);
1213     iv = string_input_visitor_new(str);
1214     visit_type_uint16List(string_input_get_visitor(iv),
1215                           list, NULL, errp);
1216
1217     g_free(str);
1218     string_input_visitor_cleanup(iv);
1219 out:
1220     string_output_visitor_cleanup(ov);
1221 }
1222
1223 void object_property_parse(Object *obj, const char *string,
1224                            const char *name, Error **errp)
1225 {
1226     StringInputVisitor *siv;
1227     siv = string_input_visitor_new(string);
1228     object_property_set(obj, string_input_get_visitor(siv), name, errp);
1229
1230     string_input_visitor_cleanup(siv);
1231 }
1232
1233 char *object_property_print(Object *obj, const char *name, bool human,
1234                             Error **errp)
1235 {
1236     StringOutputVisitor *sov;
1237     char *string = NULL;
1238     Error *local_err = NULL;
1239
1240     sov = string_output_visitor_new(human);
1241     object_property_get(obj, string_output_get_visitor(sov), name, &local_err);
1242     if (local_err) {
1243         error_propagate(errp, local_err);
1244         goto out;
1245     }
1246
1247     string = string_output_get_string(sov);
1248
1249 out:
1250     string_output_visitor_cleanup(sov);
1251     return string;
1252 }
1253
1254 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1255 {
1256     ObjectProperty *prop = object_property_find(obj, name, errp);
1257     if (prop == NULL) {
1258         return NULL;
1259     }
1260
1261     return prop->type;
1262 }
1263
1264 Object *object_get_root(void)
1265 {
1266     static Object *root;
1267
1268     if (!root) {
1269         root = object_new("container");
1270     }
1271
1272     return root;
1273 }
1274
1275 Object *object_get_objects_root(void)
1276 {
1277     return container_get(object_get_root(), "/objects");
1278 }
1279
1280 static void object_get_child_property(Object *obj, Visitor *v, void *opaque,
1281                                       const char *name, Error **errp)
1282 {
1283     Object *child = opaque;
1284     gchar *path;
1285
1286     path = object_get_canonical_path(child);
1287     visit_type_str(v, &path, name, errp);
1288     g_free(path);
1289 }
1290
1291 static Object *object_resolve_child_property(Object *parent, void *opaque, const gchar *part)
1292 {
1293     return opaque;
1294 }
1295
1296 static void object_finalize_child_property(Object *obj, const char *name,
1297                                            void *opaque)
1298 {
1299     Object *child = opaque;
1300
1301     if (child->class->unparent) {
1302         (child->class->unparent)(child);
1303     }
1304     child->parent = NULL;
1305     object_unref(child);
1306 }
1307
1308 void object_property_add_child(Object *obj, const char *name,
1309                                Object *child, Error **errp)
1310 {
1311     Error *local_err = NULL;
1312     gchar *type;
1313     ObjectProperty *op;
1314
1315     if (child->parent != NULL) {
1316         error_setg(errp, "child object is already parented");
1317         return;
1318     }
1319
1320     type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
1321
1322     op = object_property_add(obj, name, type, object_get_child_property, NULL,
1323                              object_finalize_child_property, child, &local_err);
1324     if (local_err) {
1325         error_propagate(errp, local_err);
1326         goto out;
1327     }
1328
1329     op->resolve = object_resolve_child_property;
1330     object_ref(child);
1331     child->parent = obj;
1332
1333 out:
1334     g_free(type);
1335 }
1336
1337 void object_property_allow_set_link(Object *obj, const char *name,
1338                                     Object *val, Error **errp)
1339 {
1340     /* Allow the link to be set, always */
1341 }
1342
1343 typedef struct {
1344     Object **child;
1345     void (*check)(Object *, const char *, Object *, Error **);
1346     ObjectPropertyLinkFlags flags;
1347 } LinkProperty;
1348
1349 static void object_get_link_property(Object *obj, Visitor *v, void *opaque,
1350                                      const char *name, Error **errp)
1351 {
1352     LinkProperty *lprop = opaque;
1353     Object **child = lprop->child;
1354     gchar *path;
1355
1356     if (*child) {
1357         path = object_get_canonical_path(*child);
1358         visit_type_str(v, &path, name, errp);
1359         g_free(path);
1360     } else {
1361         path = (gchar *)"";
1362         visit_type_str(v, &path, name, errp);
1363     }
1364 }
1365
1366 /*
1367  * object_resolve_link:
1368  *
1369  * Lookup an object and ensure its type matches the link property type.  This
1370  * is similar to object_resolve_path() except type verification against the
1371  * link property is performed.
1372  *
1373  * Returns: The matched object or NULL on path lookup failures.
1374  */
1375 static Object *object_resolve_link(Object *obj, const char *name,
1376                                    const char *path, Error **errp)
1377 {
1378     const char *type;
1379     gchar *target_type;
1380     bool ambiguous = false;
1381     Object *target;
1382
1383     /* Go from link<FOO> to FOO.  */
1384     type = object_property_get_type(obj, name, NULL);
1385     target_type = g_strndup(&type[5], strlen(type) - 6);
1386     target = object_resolve_path_type(path, target_type, &ambiguous);
1387
1388     if (ambiguous) {
1389         error_setg(errp, "Path '%s' does not uniquely identify an object",
1390                    path);
1391     } else if (!target) {
1392         target = object_resolve_path(path, &ambiguous);
1393         if (target || ambiguous) {
1394             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1395         } else {
1396             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1397                       "Device '%s' not found", path);
1398         }
1399         target = NULL;
1400     }
1401     g_free(target_type);
1402
1403     return target;
1404 }
1405
1406 static void object_set_link_property(Object *obj, Visitor *v, void *opaque,
1407                                      const char *name, Error **errp)
1408 {
1409     Error *local_err = NULL;
1410     LinkProperty *prop = opaque;
1411     Object **child = prop->child;
1412     Object *old_target = *child;
1413     Object *new_target = NULL;
1414     char *path = NULL;
1415
1416     visit_type_str(v, &path, name, &local_err);
1417
1418     if (!local_err && strcmp(path, "") != 0) {
1419         new_target = object_resolve_link(obj, name, path, &local_err);
1420     }
1421
1422     g_free(path);
1423     if (local_err) {
1424         error_propagate(errp, local_err);
1425         return;
1426     }
1427
1428     prop->check(obj, name, new_target, &local_err);
1429     if (local_err) {
1430         error_propagate(errp, local_err);
1431         return;
1432     }
1433
1434     object_ref(new_target);
1435     *child = new_target;
1436     object_unref(old_target);
1437 }
1438
1439 static Object *object_resolve_link_property(Object *parent, void *opaque, const gchar *part)
1440 {
1441     LinkProperty *lprop = opaque;
1442
1443     return *lprop->child;
1444 }
1445
1446 static void object_release_link_property(Object *obj, const char *name,
1447                                          void *opaque)
1448 {
1449     LinkProperty *prop = opaque;
1450
1451     if ((prop->flags & OBJ_PROP_LINK_UNREF_ON_RELEASE) && *prop->child) {
1452         object_unref(*prop->child);
1453     }
1454     g_free(prop);
1455 }
1456
1457 void object_property_add_link(Object *obj, const char *name,
1458                               const char *type, Object **child,
1459                               void (*check)(Object *, const char *,
1460                                             Object *, Error **),
1461                               ObjectPropertyLinkFlags flags,
1462                               Error **errp)
1463 {
1464     Error *local_err = NULL;
1465     LinkProperty *prop = g_malloc(sizeof(*prop));
1466     gchar *full_type;
1467     ObjectProperty *op;
1468
1469     prop->child = child;
1470     prop->check = check;
1471     prop->flags = flags;
1472
1473     full_type = g_strdup_printf("link<%s>", type);
1474
1475     op = object_property_add(obj, name, full_type,
1476                              object_get_link_property,
1477                              check ? object_set_link_property : NULL,
1478                              object_release_link_property,
1479                              prop,
1480                              &local_err);
1481     if (local_err) {
1482         error_propagate(errp, local_err);
1483         g_free(prop);
1484         goto out;
1485     }
1486
1487     op->resolve = object_resolve_link_property;
1488
1489 out:
1490     g_free(full_type);
1491 }
1492
1493 void object_property_add_const_link(Object *obj, const char *name,
1494                                     Object *target, Error **errp)
1495 {
1496     char *link_type;
1497     ObjectProperty *op;
1498
1499     link_type = g_strdup_printf("link<%s>", object_get_typename(target));
1500     op = object_property_add(obj, name, link_type,
1501                              object_get_child_property, NULL,
1502                              NULL, target, errp);
1503     if (op != NULL) {
1504         op->resolve = object_resolve_child_property;
1505     }
1506     g_free(link_type);
1507 }
1508
1509 gchar *object_get_canonical_path_component(Object *obj)
1510 {
1511     ObjectProperty *prop = NULL;
1512     GHashTableIter iter;
1513
1514     g_assert(obj);
1515     g_assert(obj->parent != NULL);
1516
1517     g_hash_table_iter_init(&iter, obj->parent->properties);
1518     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1519         if (!object_property_is_child(prop)) {
1520             continue;
1521         }
1522
1523         if (prop->opaque == obj) {
1524             return g_strdup(prop->name);
1525         }
1526     }
1527
1528     /* obj had a parent but was not a child, should never happen */
1529     g_assert_not_reached();
1530     return NULL;
1531 }
1532
1533 gchar *object_get_canonical_path(Object *obj)
1534 {
1535     Object *root = object_get_root();
1536     char *newpath, *path = NULL;
1537
1538     while (obj != root) {
1539         char *component = object_get_canonical_path_component(obj);
1540
1541         if (path) {
1542             newpath = g_strdup_printf("%s/%s", component, path);
1543             g_free(component);
1544             g_free(path);
1545             path = newpath;
1546         } else {
1547             path = component;
1548         }
1549
1550         obj = obj->parent;
1551     }
1552
1553     newpath = g_strdup_printf("/%s", path ? path : "");
1554     g_free(path);
1555
1556     return newpath;
1557 }
1558
1559 Object *object_resolve_path_component(Object *parent, const gchar *part)
1560 {
1561     ObjectProperty *prop = object_property_find(parent, part, NULL);
1562     if (prop == NULL) {
1563         return NULL;
1564     }
1565
1566     if (prop->resolve) {
1567         return prop->resolve(parent, prop->opaque, part);
1568     } else {
1569         return NULL;
1570     }
1571 }
1572
1573 static Object *object_resolve_abs_path(Object *parent,
1574                                           gchar **parts,
1575                                           const char *typename,
1576                                           int index)
1577 {
1578     Object *child;
1579
1580     if (parts[index] == NULL) {
1581         return object_dynamic_cast(parent, typename);
1582     }
1583
1584     if (strcmp(parts[index], "") == 0) {
1585         return object_resolve_abs_path(parent, parts, typename, index + 1);
1586     }
1587
1588     child = object_resolve_path_component(parent, parts[index]);
1589     if (!child) {
1590         return NULL;
1591     }
1592
1593     return object_resolve_abs_path(child, parts, typename, index + 1);
1594 }
1595
1596 static Object *object_resolve_partial_path(Object *parent,
1597                                               gchar **parts,
1598                                               const char *typename,
1599                                               bool *ambiguous)
1600 {
1601     Object *obj;
1602     GHashTableIter iter;
1603     ObjectProperty *prop;
1604
1605     obj = object_resolve_abs_path(parent, parts, typename, 0);
1606
1607     g_hash_table_iter_init(&iter, parent->properties);
1608     while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1609         Object *found;
1610
1611         if (!object_property_is_child(prop)) {
1612             continue;
1613         }
1614
1615         found = object_resolve_partial_path(prop->opaque, parts,
1616                                             typename, ambiguous);
1617         if (found) {
1618             if (obj) {
1619                 if (ambiguous) {
1620                     *ambiguous = true;
1621                 }
1622                 return NULL;
1623             }
1624             obj = found;
1625         }
1626
1627         if (ambiguous && *ambiguous) {
1628             return NULL;
1629         }
1630     }
1631
1632     return obj;
1633 }
1634
1635 Object *object_resolve_path_type(const char *path, const char *typename,
1636                                  bool *ambiguous)
1637 {
1638     Object *obj;
1639     gchar **parts;
1640
1641     parts = g_strsplit(path, "/", 0);
1642     assert(parts);
1643
1644     if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
1645         if (ambiguous) {
1646             *ambiguous = false;
1647         }
1648         obj = object_resolve_partial_path(object_get_root(), parts,
1649                                           typename, ambiguous);
1650     } else {
1651         obj = object_resolve_abs_path(object_get_root(), parts, typename, 1);
1652     }
1653
1654     g_strfreev(parts);
1655
1656     return obj;
1657 }
1658
1659 Object *object_resolve_path(const char *path, bool *ambiguous)
1660 {
1661     return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
1662 }
1663
1664 typedef struct StringProperty
1665 {
1666     char *(*get)(Object *, Error **);
1667     void (*set)(Object *, const char *, Error **);
1668 } StringProperty;
1669
1670 static void property_get_str(Object *obj, Visitor *v, void *opaque,
1671                              const char *name, Error **errp)
1672 {
1673     StringProperty *prop = opaque;
1674     char *value;
1675     Error *err = NULL;
1676
1677     value = prop->get(obj, &err);
1678     if (err) {
1679         error_propagate(errp, err);
1680         return;
1681     }
1682
1683     visit_type_str(v, &value, name, errp);
1684     g_free(value);
1685 }
1686
1687 static void property_set_str(Object *obj, Visitor *v, void *opaque,
1688                              const char *name, Error **errp)
1689 {
1690     StringProperty *prop = opaque;
1691     char *value;
1692     Error *local_err = NULL;
1693
1694     visit_type_str(v, &value, name, &local_err);
1695     if (local_err) {
1696         error_propagate(errp, local_err);
1697         return;
1698     }
1699
1700     prop->set(obj, value, errp);
1701     g_free(value);
1702 }
1703
1704 static void property_release_str(Object *obj, const char *name,
1705                                  void *opaque)
1706 {
1707     StringProperty *prop = opaque;
1708     g_free(prop);
1709 }
1710
1711 void object_property_add_str(Object *obj, const char *name,
1712                            char *(*get)(Object *, Error **),
1713                            void (*set)(Object *, const char *, Error **),
1714                            Error **errp)
1715 {
1716     Error *local_err = NULL;
1717     StringProperty *prop = g_malloc0(sizeof(*prop));
1718
1719     prop->get = get;
1720     prop->set = set;
1721
1722     object_property_add(obj, name, "string",
1723                         get ? property_get_str : NULL,
1724                         set ? property_set_str : NULL,
1725                         property_release_str,
1726                         prop, &local_err);
1727     if (local_err) {
1728         error_propagate(errp, local_err);
1729         g_free(prop);
1730     }
1731 }
1732
1733 typedef struct BoolProperty
1734 {
1735     bool (*get)(Object *, Error **);
1736     void (*set)(Object *, bool, Error **);
1737 } BoolProperty;
1738
1739 static void property_get_bool(Object *obj, Visitor *v, void *opaque,
1740                               const char *name, Error **errp)
1741 {
1742     BoolProperty *prop = opaque;
1743     bool value;
1744     Error *err = NULL;
1745
1746     value = prop->get(obj, &err);
1747     if (err) {
1748         error_propagate(errp, err);
1749         return;
1750     }
1751
1752     visit_type_bool(v, &value, name, errp);
1753 }
1754
1755 static void property_set_bool(Object *obj, Visitor *v, void *opaque,
1756                               const char *name, Error **errp)
1757 {
1758     BoolProperty *prop = opaque;
1759     bool value;
1760     Error *local_err = NULL;
1761
1762     visit_type_bool(v, &value, name, &local_err);
1763     if (local_err) {
1764         error_propagate(errp, local_err);
1765         return;
1766     }
1767
1768     prop->set(obj, value, errp);
1769 }
1770
1771 static void property_release_bool(Object *obj, const char *name,
1772                                   void *opaque)
1773 {
1774     BoolProperty *prop = opaque;
1775     g_free(prop);
1776 }
1777
1778 void object_property_add_bool(Object *obj, const char *name,
1779                               bool (*get)(Object *, Error **),
1780                               void (*set)(Object *, bool, Error **),
1781                               Error **errp)
1782 {
1783     Error *local_err = NULL;
1784     BoolProperty *prop = g_malloc0(sizeof(*prop));
1785
1786     prop->get = get;
1787     prop->set = set;
1788
1789     object_property_add(obj, name, "bool",
1790                         get ? property_get_bool : NULL,
1791                         set ? property_set_bool : NULL,
1792                         property_release_bool,
1793                         prop, &local_err);
1794     if (local_err) {
1795         error_propagate(errp, local_err);
1796         g_free(prop);
1797     }
1798 }
1799
1800 static void property_get_enum(Object *obj, Visitor *v, void *opaque,
1801                               const char *name, Error **errp)
1802 {
1803     EnumProperty *prop = opaque;
1804     int value;
1805     Error *err = NULL;
1806
1807     value = prop->get(obj, &err);
1808     if (err) {
1809         error_propagate(errp, err);
1810         return;
1811     }
1812
1813     visit_type_enum(v, &value, prop->strings, NULL, name, errp);
1814 }
1815
1816 static void property_set_enum(Object *obj, Visitor *v, void *opaque,
1817                               const char *name, Error **errp)
1818 {
1819     EnumProperty *prop = opaque;
1820     int value;
1821     Error *err = NULL;
1822
1823     visit_type_enum(v, &value, prop->strings, NULL, name, &err);
1824     if (err) {
1825         error_propagate(errp, err);
1826         return;
1827     }
1828     prop->set(obj, value, errp);
1829 }
1830
1831 static void property_release_enum(Object *obj, const char *name,
1832                                   void *opaque)
1833 {
1834     EnumProperty *prop = opaque;
1835     g_free(prop);
1836 }
1837
1838 void object_property_add_enum(Object *obj, const char *name,
1839                               const char *typename,
1840                               const char * const *strings,
1841                               int (*get)(Object *, Error **),
1842                               void (*set)(Object *, int, Error **),
1843                               Error **errp)
1844 {
1845     Error *local_err = NULL;
1846     EnumProperty *prop = g_malloc(sizeof(*prop));
1847
1848     prop->strings = strings;
1849     prop->get = get;
1850     prop->set = set;
1851
1852     object_property_add(obj, name, typename,
1853                         get ? property_get_enum : NULL,
1854                         set ? property_set_enum : NULL,
1855                         property_release_enum,
1856                         prop, &local_err);
1857     if (local_err) {
1858         error_propagate(errp, local_err);
1859         g_free(prop);
1860     }
1861 }
1862
1863 typedef struct TMProperty {
1864     void (*get)(Object *, struct tm *, Error **);
1865 } TMProperty;
1866
1867 static void property_get_tm(Object *obj, Visitor *v, void *opaque,
1868                             const char *name, Error **errp)
1869 {
1870     TMProperty *prop = opaque;
1871     Error *err = NULL;
1872     struct tm value;
1873
1874     prop->get(obj, &value, &err);
1875     if (err) {
1876         goto out;
1877     }
1878
1879     visit_start_struct(v, NULL, "struct tm", name, 0, &err);
1880     if (err) {
1881         goto out;
1882     }
1883     visit_type_int32(v, &value.tm_year, "tm_year", &err);
1884     if (err) {
1885         goto out_end;
1886     }
1887     visit_type_int32(v, &value.tm_mon, "tm_mon", &err);
1888     if (err) {
1889         goto out_end;
1890     }
1891     visit_type_int32(v, &value.tm_mday, "tm_mday", &err);
1892     if (err) {
1893         goto out_end;
1894     }
1895     visit_type_int32(v, &value.tm_hour, "tm_hour", &err);
1896     if (err) {
1897         goto out_end;
1898     }
1899     visit_type_int32(v, &value.tm_min, "tm_min", &err);
1900     if (err) {
1901         goto out_end;
1902     }
1903     visit_type_int32(v, &value.tm_sec, "tm_sec", &err);
1904     if (err) {
1905         goto out_end;
1906     }
1907 out_end:
1908     error_propagate(errp, err);
1909     err = NULL;
1910     visit_end_struct(v, errp);
1911 out:
1912     error_propagate(errp, err);
1913
1914 }
1915
1916 static void property_release_tm(Object *obj, const char *name,
1917                                 void *opaque)
1918 {
1919     TMProperty *prop = opaque;
1920     g_free(prop);
1921 }
1922
1923 void object_property_add_tm(Object *obj, const char *name,
1924                             void (*get)(Object *, struct tm *, Error **),
1925                             Error **errp)
1926 {
1927     Error *local_err = NULL;
1928     TMProperty *prop = g_malloc0(sizeof(*prop));
1929
1930     prop->get = get;
1931
1932     object_property_add(obj, name, "struct tm",
1933                         get ? property_get_tm : NULL, NULL,
1934                         property_release_tm,
1935                         prop, &local_err);
1936     if (local_err) {
1937         error_propagate(errp, local_err);
1938         g_free(prop);
1939     }
1940 }
1941
1942 static char *qdev_get_type(Object *obj, Error **errp)
1943 {
1944     return g_strdup(object_get_typename(obj));
1945 }
1946
1947 static void property_get_uint8_ptr(Object *obj, Visitor *v,
1948                                    void *opaque, const char *name,
1949                                    Error **errp)
1950 {
1951     uint8_t value = *(uint8_t *)opaque;
1952     visit_type_uint8(v, &value, name, errp);
1953 }
1954
1955 static void property_get_uint16_ptr(Object *obj, Visitor *v,
1956                                    void *opaque, const char *name,
1957                                    Error **errp)
1958 {
1959     uint16_t value = *(uint16_t *)opaque;
1960     visit_type_uint16(v, &value, name, errp);
1961 }
1962
1963 static void property_get_uint32_ptr(Object *obj, Visitor *v,
1964                                    void *opaque, const char *name,
1965                                    Error **errp)
1966 {
1967     uint32_t value = *(uint32_t *)opaque;
1968     visit_type_uint32(v, &value, name, errp);
1969 }
1970
1971 static void property_get_uint64_ptr(Object *obj, Visitor *v,
1972                                    void *opaque, const char *name,
1973                                    Error **errp)
1974 {
1975     uint64_t value = *(uint64_t *)opaque;
1976     visit_type_uint64(v, &value, name, errp);
1977 }
1978
1979 void object_property_add_uint8_ptr(Object *obj, const char *name,
1980                                    const uint8_t *v, Error **errp)
1981 {
1982     object_property_add(obj, name, "uint8", property_get_uint8_ptr,
1983                         NULL, NULL, (void *)v, errp);
1984 }
1985
1986 void object_property_add_uint16_ptr(Object *obj, const char *name,
1987                                     const uint16_t *v, Error **errp)
1988 {
1989     object_property_add(obj, name, "uint16", property_get_uint16_ptr,
1990                         NULL, NULL, (void *)v, errp);
1991 }
1992
1993 void object_property_add_uint32_ptr(Object *obj, const char *name,
1994                                     const uint32_t *v, Error **errp)
1995 {
1996     object_property_add(obj, name, "uint32", property_get_uint32_ptr,
1997                         NULL, NULL, (void *)v, errp);
1998 }
1999
2000 void object_property_add_uint64_ptr(Object *obj, const char *name,
2001                                     const uint64_t *v, Error **errp)
2002 {
2003     object_property_add(obj, name, "uint64", property_get_uint64_ptr,
2004                         NULL, NULL, (void *)v, errp);
2005 }
2006
2007 typedef struct {
2008     Object *target_obj;
2009     char *target_name;
2010 } AliasProperty;
2011
2012 static void property_get_alias(Object *obj, struct Visitor *v, void *opaque,
2013                                const char *name, Error **errp)
2014 {
2015     AliasProperty *prop = opaque;
2016
2017     object_property_get(prop->target_obj, v, prop->target_name, errp);
2018 }
2019
2020 static void property_set_alias(Object *obj, struct Visitor *v, void *opaque,
2021                                const char *name, Error **errp)
2022 {
2023     AliasProperty *prop = opaque;
2024
2025     object_property_set(prop->target_obj, v, prop->target_name, errp);
2026 }
2027
2028 static Object *property_resolve_alias(Object *obj, void *opaque,
2029                                       const gchar *part)
2030 {
2031     AliasProperty *prop = opaque;
2032
2033     return object_resolve_path_component(prop->target_obj, prop->target_name);
2034 }
2035
2036 static void property_release_alias(Object *obj, const char *name, void *opaque)
2037 {
2038     AliasProperty *prop = opaque;
2039
2040     g_free(prop->target_name);
2041     g_free(prop);
2042 }
2043
2044 void object_property_add_alias(Object *obj, const char *name,
2045                                Object *target_obj, const char *target_name,
2046                                Error **errp)
2047 {
2048     AliasProperty *prop;
2049     ObjectProperty *op;
2050     ObjectProperty *target_prop;
2051     gchar *prop_type;
2052     Error *local_err = NULL;
2053
2054     target_prop = object_property_find(target_obj, target_name, errp);
2055     if (!target_prop) {
2056         return;
2057     }
2058
2059     if (object_property_is_child(target_prop)) {
2060         prop_type = g_strdup_printf("link%s",
2061                                     target_prop->type + strlen("child"));
2062     } else {
2063         prop_type = g_strdup(target_prop->type);
2064     }
2065
2066     prop = g_malloc(sizeof(*prop));
2067     prop->target_obj = target_obj;
2068     prop->target_name = g_strdup(target_name);
2069
2070     op = object_property_add(obj, name, prop_type,
2071                              property_get_alias,
2072                              property_set_alias,
2073                              property_release_alias,
2074                              prop, &local_err);
2075     if (local_err) {
2076         error_propagate(errp, local_err);
2077         g_free(prop);
2078         goto out;
2079     }
2080     op->resolve = property_resolve_alias;
2081
2082     object_property_set_description(obj, op->name,
2083                                     target_prop->description,
2084                                     &error_abort);
2085
2086 out:
2087     g_free(prop_type);
2088 }
2089
2090 void object_property_set_description(Object *obj, const char *name,
2091                                      const char *description, Error **errp)
2092 {
2093     ObjectProperty *op;
2094
2095     op = object_property_find(obj, name, errp);
2096     if (!op) {
2097         return;
2098     }
2099
2100     g_free(op->description);
2101     op->description = g_strdup(description);
2102 }
2103
2104 static void object_instance_init(Object *obj)
2105 {
2106     object_property_add_str(obj, "type", qdev_get_type, NULL, NULL);
2107 }
2108
2109 static void register_types(void)
2110 {
2111     static TypeInfo interface_info = {
2112         .name = TYPE_INTERFACE,
2113         .class_size = sizeof(InterfaceClass),
2114         .abstract = true,
2115     };
2116
2117     static TypeInfo object_info = {
2118         .name = TYPE_OBJECT,
2119         .instance_size = sizeof(Object),
2120         .instance_init = object_instance_init,
2121         .abstract = true,
2122     };
2123
2124     type_interface = type_register_internal(&interface_info);
2125     type_register_internal(&object_info);
2126 }
2127
2128 type_init(register_types)