1 /* 2 * QEMU Object Model 3 * 4 * Copyright IBM, Corp. 2011 5 * 6 * Authors: 7 * Anthony Liguori <aliguori@us.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "hw/qdev-core.h" 15 #include "qapi/error.h" 16 #include "qom/object.h" 17 #include "qom/object_interfaces.h" 18 #include "qemu/cutils.h" 19 #include "qapi/visitor.h" 20 #include "qapi/string-input-visitor.h" 21 #include "qapi/string-output-visitor.h" 22 #include "qapi/qobject-input-visitor.h" 23 #include "qapi/qapi-builtin-visit.h" 24 #include "qapi/qmp/qerror.h" 25 #include "qapi/qmp/qjson.h" 26 #include "trace.h" 27 28 /* TODO: replace QObject with a simpler visitor to avoid a dependency 29 * of the QOM core on QObject? */ 30 #include "qom/qom-qobject.h" 31 #include "qapi/qmp/qbool.h" 32 #include "qapi/qmp/qnum.h" 33 #include "qapi/qmp/qstring.h" 34 #include "qemu/error-report.h" 35 36 #define MAX_INTERFACES 32 37 38 typedef struct InterfaceImpl InterfaceImpl; 39 typedef struct TypeImpl TypeImpl; 40 41 struct InterfaceImpl 42 { 43 const char *typename; 44 }; 45 46 struct TypeImpl 47 { 48 const char *name; 49 50 size_t class_size; 51 52 size_t instance_size; 53 54 void (*class_init)(ObjectClass *klass, void *data); 55 void (*class_base_init)(ObjectClass *klass, void *data); 56 57 void *class_data; 58 59 void (*instance_init)(Object *obj); 60 void (*instance_post_init)(Object *obj); 61 void (*instance_finalize)(Object *obj); 62 63 bool abstract; 64 65 const char *parent; 66 TypeImpl *parent_type; 67 68 ObjectClass *class; 69 70 int num_interfaces; 71 InterfaceImpl interfaces[MAX_INTERFACES]; 72 }; 73 74 static Type type_interface; 75 76 static GHashTable *type_table_get(void) 77 { 78 static GHashTable *type_table; 79 80 if (type_table == NULL) { 81 type_table = g_hash_table_new(g_str_hash, g_str_equal); 82 } 83 84 return type_table; 85 } 86 87 static bool enumerating_types; 88 89 static void type_table_add(TypeImpl *ti) 90 { 91 assert(!enumerating_types); 92 g_hash_table_insert(type_table_get(), (void *)ti->name, ti); 93 } 94 95 static TypeImpl *type_table_lookup(const char *name) 96 { 97 return g_hash_table_lookup(type_table_get(), name); 98 } 99 100 static TypeImpl *type_new(const TypeInfo *info) 101 { 102 TypeImpl *ti = g_malloc0(sizeof(*ti)); 103 int i; 104 105 g_assert(info->name != NULL); 106 107 if (type_table_lookup(info->name) != NULL) { 108 fprintf(stderr, "Registering `%s' which already exists\n", info->name); 109 abort(); 110 } 111 112 ti->name = g_strdup(info->name); 113 ti->parent = g_strdup(info->parent); 114 115 ti->class_size = info->class_size; 116 ti->instance_size = info->instance_size; 117 118 ti->class_init = info->class_init; 119 ti->class_base_init = info->class_base_init; 120 ti->class_data = info->class_data; 121 122 ti->instance_init = info->instance_init; 123 ti->instance_post_init = info->instance_post_init; 124 ti->instance_finalize = info->instance_finalize; 125 126 ti->abstract = info->abstract; 127 128 for (i = 0; info->interfaces && info->interfaces[i].type; i++) { 129 ti->interfaces[i].typename = g_strdup(info->interfaces[i].type); 130 } 131 ti->num_interfaces = i; 132 133 return ti; 134 } 135 136 static TypeImpl *type_register_internal(const TypeInfo *info) 137 { 138 TypeImpl *ti; 139 ti = type_new(info); 140 141 type_table_add(ti); 142 return ti; 143 } 144 145 TypeImpl *type_register(const TypeInfo *info) 146 { 147 assert(info->parent); 148 return type_register_internal(info); 149 } 150 151 TypeImpl *type_register_static(const TypeInfo *info) 152 { 153 return type_register(info); 154 } 155 156 void type_register_static_array(const TypeInfo *infos, int nr_infos) 157 { 158 int i; 159 160 for (i = 0; i < nr_infos; i++) { 161 type_register_static(&infos[i]); 162 } 163 } 164 165 static TypeImpl *type_get_by_name(const char *name) 166 { 167 if (name == NULL) { 168 return NULL; 169 } 170 171 return type_table_lookup(name); 172 } 173 174 static TypeImpl *type_get_parent(TypeImpl *type) 175 { 176 if (!type->parent_type && type->parent) { 177 type->parent_type = type_get_by_name(type->parent); 178 if (!type->parent_type) { 179 fprintf(stderr, "Type '%s' is missing its parent '%s'\n", 180 type->name, type->parent); 181 abort(); 182 } 183 } 184 185 return type->parent_type; 186 } 187 188 static bool type_has_parent(TypeImpl *type) 189 { 190 return (type->parent != NULL); 191 } 192 193 static size_t type_class_get_size(TypeImpl *ti) 194 { 195 if (ti->class_size) { 196 return ti->class_size; 197 } 198 199 if (type_has_parent(ti)) { 200 return type_class_get_size(type_get_parent(ti)); 201 } 202 203 return sizeof(ObjectClass); 204 } 205 206 static size_t type_object_get_size(TypeImpl *ti) 207 { 208 if (ti->instance_size) { 209 return ti->instance_size; 210 } 211 212 if (type_has_parent(ti)) { 213 return type_object_get_size(type_get_parent(ti)); 214 } 215 216 return 0; 217 } 218 219 size_t object_type_get_instance_size(const char *typename) 220 { 221 TypeImpl *type = type_get_by_name(typename); 222 223 g_assert(type != NULL); 224 return type_object_get_size(type); 225 } 226 227 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) 228 { 229 assert(target_type); 230 231 /* Check if target_type is a direct ancestor of type */ 232 while (type) { 233 if (type == target_type) { 234 return true; 235 } 236 237 type = type_get_parent(type); 238 } 239 240 return false; 241 } 242 243 static void type_initialize(TypeImpl *ti); 244 245 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type, 246 TypeImpl *parent_type) 247 { 248 InterfaceClass *new_iface; 249 TypeInfo info = { }; 250 TypeImpl *iface_impl; 251 252 info.parent = parent_type->name; 253 info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name); 254 info.abstract = true; 255 256 iface_impl = type_new(&info); 257 iface_impl->parent_type = parent_type; 258 type_initialize(iface_impl); 259 g_free((char *)info.name); 260 261 new_iface = (InterfaceClass *)iface_impl->class; 262 new_iface->concrete_class = ti->class; 263 new_iface->interface_type = interface_type; 264 265 ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface); 266 } 267 268 static void object_property_free(gpointer data) 269 { 270 ObjectProperty *prop = data; 271 272 if (prop->defval) { 273 qobject_unref(prop->defval); 274 prop->defval = NULL; 275 } 276 g_free(prop->name); 277 g_free(prop->type); 278 g_free(prop->description); 279 g_free(prop); 280 } 281 282 static void type_initialize(TypeImpl *ti) 283 { 284 TypeImpl *parent; 285 286 if (ti->class) { 287 return; 288 } 289 290 ti->class_size = type_class_get_size(ti); 291 ti->instance_size = type_object_get_size(ti); 292 /* Any type with zero instance_size is implicitly abstract. 293 * This means interface types are all abstract. 294 */ 295 if (ti->instance_size == 0) { 296 ti->abstract = true; 297 } 298 if (type_is_ancestor(ti, type_interface)) { 299 assert(ti->instance_size == 0); 300 assert(ti->abstract); 301 assert(!ti->instance_init); 302 assert(!ti->instance_post_init); 303 assert(!ti->instance_finalize); 304 assert(!ti->num_interfaces); 305 } 306 ti->class = g_malloc0(ti->class_size); 307 308 parent = type_get_parent(ti); 309 if (parent) { 310 type_initialize(parent); 311 GSList *e; 312 int i; 313 314 g_assert(parent->class_size <= ti->class_size); 315 g_assert(parent->instance_size <= ti->instance_size); 316 memcpy(ti->class, parent->class, parent->class_size); 317 ti->class->interfaces = NULL; 318 319 for (e = parent->class->interfaces; e; e = e->next) { 320 InterfaceClass *iface = e->data; 321 ObjectClass *klass = OBJECT_CLASS(iface); 322 323 type_initialize_interface(ti, iface->interface_type, klass->type); 324 } 325 326 for (i = 0; i < ti->num_interfaces; i++) { 327 TypeImpl *t = type_get_by_name(ti->interfaces[i].typename); 328 if (!t) { 329 error_report("missing interface '%s' for object '%s'", 330 ti->interfaces[i].typename, parent->name); 331 abort(); 332 } 333 for (e = ti->class->interfaces; e; e = e->next) { 334 TypeImpl *target_type = OBJECT_CLASS(e->data)->type; 335 336 if (type_is_ancestor(target_type, t)) { 337 break; 338 } 339 } 340 341 if (e) { 342 continue; 343 } 344 345 type_initialize_interface(ti, t, t); 346 } 347 } 348 349 ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, 350 object_property_free); 351 352 ti->class->type = ti; 353 354 while (parent) { 355 if (parent->class_base_init) { 356 parent->class_base_init(ti->class, ti->class_data); 357 } 358 parent = type_get_parent(parent); 359 } 360 361 if (ti->class_init) { 362 ti->class_init(ti->class, ti->class_data); 363 } 364 } 365 366 static void object_init_with_type(Object *obj, TypeImpl *ti) 367 { 368 if (type_has_parent(ti)) { 369 object_init_with_type(obj, type_get_parent(ti)); 370 } 371 372 if (ti->instance_init) { 373 ti->instance_init(obj); 374 } 375 } 376 377 static void object_post_init_with_type(Object *obj, TypeImpl *ti) 378 { 379 if (ti->instance_post_init) { 380 ti->instance_post_init(obj); 381 } 382 383 if (type_has_parent(ti)) { 384 object_post_init_with_type(obj, type_get_parent(ti)); 385 } 386 } 387 388 bool object_apply_global_props(Object *obj, const GPtrArray *props, 389 Error **errp) 390 { 391 int i; 392 393 if (!props) { 394 return true; 395 } 396 397 for (i = 0; i < props->len; i++) { 398 GlobalProperty *p = g_ptr_array_index(props, i); 399 Error *err = NULL; 400 401 if (object_dynamic_cast(obj, p->driver) == NULL) { 402 continue; 403 } 404 if (p->optional && !object_property_find(obj, p->property, NULL)) { 405 continue; 406 } 407 p->used = true; 408 if (!object_property_parse(obj, p->property, p->value, &err)) { 409 error_prepend(&err, "can't apply global %s.%s=%s: ", 410 p->driver, p->property, p->value); 411 /* 412 * If errp != NULL, propagate error and return. 413 * If errp == NULL, report a warning, but keep going 414 * with the remaining globals. 415 */ 416 if (errp) { 417 error_propagate(errp, err); 418 return false; 419 } else { 420 warn_report_err(err); 421 } 422 } 423 } 424 425 return true; 426 } 427 428 /* 429 * Global property defaults 430 * Slot 0: accelerator's global property defaults 431 * Slot 1: machine's global property defaults 432 * Slot 2: global properties from legacy command line option 433 * Each is a GPtrArray of of GlobalProperty. 434 * Applied in order, later entries override earlier ones. 435 */ 436 static GPtrArray *object_compat_props[3]; 437 438 /* 439 * Retrieve @GPtrArray for global property defined with options 440 * other than "-global". These are generally used for syntactic 441 * sugar and legacy command line options. 442 */ 443 void object_register_sugar_prop(const char *driver, const char *prop, const char *value) 444 { 445 GlobalProperty *g; 446 if (!object_compat_props[2]) { 447 object_compat_props[2] = g_ptr_array_new(); 448 } 449 g = g_new0(GlobalProperty, 1); 450 g->driver = g_strdup(driver); 451 g->property = g_strdup(prop); 452 g->value = g_strdup(value); 453 g_ptr_array_add(object_compat_props[2], g); 454 } 455 456 /* 457 * Set machine's global property defaults to @compat_props. 458 * May be called at most once. 459 */ 460 void object_set_machine_compat_props(GPtrArray *compat_props) 461 { 462 assert(!object_compat_props[1]); 463 object_compat_props[1] = compat_props; 464 } 465 466 /* 467 * Set accelerator's global property defaults to @compat_props. 468 * May be called at most once. 469 */ 470 void object_set_accelerator_compat_props(GPtrArray *compat_props) 471 { 472 assert(!object_compat_props[0]); 473 object_compat_props[0] = compat_props; 474 } 475 476 void object_apply_compat_props(Object *obj) 477 { 478 int i; 479 480 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) { 481 object_apply_global_props(obj, object_compat_props[i], 482 i == 2 ? &error_fatal : &error_abort); 483 } 484 } 485 486 static void object_class_property_init_all(Object *obj) 487 { 488 ObjectPropertyIterator iter; 489 ObjectProperty *prop; 490 491 object_class_property_iter_init(&iter, object_get_class(obj)); 492 while ((prop = object_property_iter_next(&iter))) { 493 if (prop->init) { 494 prop->init(obj, prop); 495 } 496 } 497 } 498 499 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type) 500 { 501 type_initialize(type); 502 503 g_assert(type->instance_size >= sizeof(Object)); 504 g_assert(type->abstract == false); 505 g_assert(size >= type->instance_size); 506 507 memset(obj, 0, type->instance_size); 508 obj->class = type->class; 509 object_ref(obj); 510 object_class_property_init_all(obj); 511 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal, 512 NULL, object_property_free); 513 object_init_with_type(obj, type); 514 object_post_init_with_type(obj, type); 515 } 516 517 void object_initialize(void *data, size_t size, const char *typename) 518 { 519 TypeImpl *type = type_get_by_name(typename); 520 521 if (!type) { 522 error_report("missing object type '%s'", typename); 523 abort(); 524 } 525 526 object_initialize_with_type(data, size, type); 527 } 528 529 bool object_initialize_child_with_props(Object *parentobj, 530 const char *propname, 531 void *childobj, size_t size, 532 const char *type, 533 Error **errp, ...) 534 { 535 va_list vargs; 536 bool ok; 537 538 va_start(vargs, errp); 539 ok = object_initialize_child_with_propsv(parentobj, propname, 540 childobj, size, type, errp, 541 vargs); 542 va_end(vargs); 543 return ok; 544 } 545 546 bool object_initialize_child_with_propsv(Object *parentobj, 547 const char *propname, 548 void *childobj, size_t size, 549 const char *type, 550 Error **errp, va_list vargs) 551 { 552 bool ok = false; 553 Object *obj; 554 UserCreatable *uc; 555 556 object_initialize(childobj, size, type); 557 obj = OBJECT(childobj); 558 559 if (!object_set_propv(obj, errp, vargs)) { 560 goto out; 561 } 562 563 object_property_add_child(parentobj, propname, obj); 564 565 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 566 if (uc) { 567 if (!user_creatable_complete(uc, errp)) { 568 object_unparent(obj); 569 goto out; 570 } 571 } 572 573 ok = true; 574 575 out: 576 /* 577 * We want @obj's reference to be 1 on success, 0 on failure. 578 * On success, it's 2: one taken by object_initialize(), and one 579 * by object_property_add_child(). 580 * On failure in object_initialize() or earlier, it's 1. 581 * On failure afterwards, it's also 1: object_unparent() releases 582 * the reference taken by object_property_add_child(). 583 */ 584 object_unref(obj); 585 return ok; 586 } 587 588 void object_initialize_child_internal(Object *parent, 589 const char *propname, 590 void *child, size_t size, 591 const char *type) 592 { 593 object_initialize_child_with_props(parent, propname, child, size, type, 594 &error_abort, NULL); 595 } 596 597 static inline bool object_property_is_child(ObjectProperty *prop) 598 { 599 return strstart(prop->type, "child<", NULL); 600 } 601 602 static void object_property_del_all(Object *obj) 603 { 604 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL); 605 ObjectProperty *prop; 606 ObjectPropertyIterator iter; 607 bool released; 608 609 do { 610 released = false; 611 object_property_iter_init(&iter, obj); 612 while ((prop = object_property_iter_next(&iter)) != NULL) { 613 if (g_hash_table_add(done, prop)) { 614 if (prop->release) { 615 prop->release(obj, prop->name, prop->opaque); 616 released = true; 617 break; 618 } 619 } 620 } 621 } while (released); 622 623 g_hash_table_unref(obj->properties); 624 } 625 626 static void object_property_del_child(Object *obj, Object *child) 627 { 628 ObjectProperty *prop; 629 GHashTableIter iter; 630 gpointer key, value; 631 632 g_hash_table_iter_init(&iter, obj->properties); 633 while (g_hash_table_iter_next(&iter, &key, &value)) { 634 prop = value; 635 if (object_property_is_child(prop) && prop->opaque == child) { 636 if (prop->release) { 637 prop->release(obj, prop->name, prop->opaque); 638 prop->release = NULL; 639 } 640 break; 641 } 642 } 643 g_hash_table_iter_init(&iter, obj->properties); 644 while (g_hash_table_iter_next(&iter, &key, &value)) { 645 prop = value; 646 if (object_property_is_child(prop) && prop->opaque == child) { 647 g_hash_table_iter_remove(&iter); 648 break; 649 } 650 } 651 } 652 653 void object_unparent(Object *obj) 654 { 655 if (obj->parent) { 656 object_property_del_child(obj->parent, obj); 657 } 658 } 659 660 static void object_deinit(Object *obj, TypeImpl *type) 661 { 662 if (type->instance_finalize) { 663 type->instance_finalize(obj); 664 } 665 666 if (type_has_parent(type)) { 667 object_deinit(obj, type_get_parent(type)); 668 } 669 } 670 671 static void object_finalize(void *data) 672 { 673 Object *obj = data; 674 TypeImpl *ti = obj->class->type; 675 676 object_property_del_all(obj); 677 object_deinit(obj, ti); 678 679 g_assert(obj->ref == 0); 680 if (obj->free) { 681 obj->free(obj); 682 } 683 } 684 685 static Object *object_new_with_type(Type type) 686 { 687 Object *obj; 688 689 g_assert(type != NULL); 690 type_initialize(type); 691 692 obj = g_malloc(type->instance_size); 693 object_initialize_with_type(obj, type->instance_size, type); 694 obj->free = g_free; 695 696 return obj; 697 } 698 699 Object *object_new_with_class(ObjectClass *klass) 700 { 701 return object_new_with_type(klass->type); 702 } 703 704 Object *object_new(const char *typename) 705 { 706 TypeImpl *ti = type_get_by_name(typename); 707 708 return object_new_with_type(ti); 709 } 710 711 712 Object *object_new_with_props(const char *typename, 713 Object *parent, 714 const char *id, 715 Error **errp, 716 ...) 717 { 718 va_list vargs; 719 Object *obj; 720 721 va_start(vargs, errp); 722 obj = object_new_with_propv(typename, parent, id, errp, vargs); 723 va_end(vargs); 724 725 return obj; 726 } 727 728 729 Object *object_new_with_propv(const char *typename, 730 Object *parent, 731 const char *id, 732 Error **errp, 733 va_list vargs) 734 { 735 Object *obj; 736 ObjectClass *klass; 737 UserCreatable *uc; 738 739 klass = object_class_by_name(typename); 740 if (!klass) { 741 error_setg(errp, "invalid object type: %s", typename); 742 return NULL; 743 } 744 745 if (object_class_is_abstract(klass)) { 746 error_setg(errp, "object type '%s' is abstract", typename); 747 return NULL; 748 } 749 obj = object_new_with_type(klass->type); 750 751 if (!object_set_propv(obj, errp, vargs)) { 752 goto error; 753 } 754 755 if (id != NULL) { 756 object_property_add_child(parent, id, obj); 757 } 758 759 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 760 if (uc) { 761 if (!user_creatable_complete(uc, errp)) { 762 if (id != NULL) { 763 object_unparent(obj); 764 } 765 goto error; 766 } 767 } 768 769 object_unref(obj); 770 return obj; 771 772 error: 773 object_unref(obj); 774 return NULL; 775 } 776 777 778 bool object_set_props(Object *obj, 779 Error **errp, 780 ...) 781 { 782 va_list vargs; 783 bool ret; 784 785 va_start(vargs, errp); 786 ret = object_set_propv(obj, errp, vargs); 787 va_end(vargs); 788 789 return ret; 790 } 791 792 793 bool object_set_propv(Object *obj, 794 Error **errp, 795 va_list vargs) 796 { 797 const char *propname; 798 799 propname = va_arg(vargs, char *); 800 while (propname != NULL) { 801 const char *value = va_arg(vargs, char *); 802 803 g_assert(value != NULL); 804 if (!object_property_parse(obj, propname, value, errp)) { 805 return false; 806 } 807 propname = va_arg(vargs, char *); 808 } 809 810 return true; 811 } 812 813 814 Object *object_dynamic_cast(Object *obj, const char *typename) 815 { 816 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) { 817 return obj; 818 } 819 820 return NULL; 821 } 822 823 Object *object_dynamic_cast_assert(Object *obj, const char *typename, 824 const char *file, int line, const char *func) 825 { 826 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)", 827 typename, file, line, func); 828 829 #ifdef CONFIG_QOM_CAST_DEBUG 830 int i; 831 Object *inst; 832 833 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) { 834 if (atomic_read(&obj->class->object_cast_cache[i]) == typename) { 835 goto out; 836 } 837 } 838 839 inst = object_dynamic_cast(obj, typename); 840 841 if (!inst && obj) { 842 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 843 file, line, func, obj, typename); 844 abort(); 845 } 846 847 assert(obj == inst); 848 849 if (obj && obj == inst) { 850 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 851 atomic_set(&obj->class->object_cast_cache[i - 1], 852 atomic_read(&obj->class->object_cast_cache[i])); 853 } 854 atomic_set(&obj->class->object_cast_cache[i - 1], typename); 855 } 856 857 out: 858 #endif 859 return obj; 860 } 861 862 ObjectClass *object_class_dynamic_cast(ObjectClass *class, 863 const char *typename) 864 { 865 ObjectClass *ret = NULL; 866 TypeImpl *target_type; 867 TypeImpl *type; 868 869 if (!class) { 870 return NULL; 871 } 872 873 /* A simple fast path that can trigger a lot for leaf classes. */ 874 type = class->type; 875 if (type->name == typename) { 876 return class; 877 } 878 879 target_type = type_get_by_name(typename); 880 if (!target_type) { 881 /* target class type unknown, so fail the cast */ 882 return NULL; 883 } 884 885 if (type->class->interfaces && 886 type_is_ancestor(target_type, type_interface)) { 887 int found = 0; 888 GSList *i; 889 890 for (i = class->interfaces; i; i = i->next) { 891 ObjectClass *target_class = i->data; 892 893 if (type_is_ancestor(target_class->type, target_type)) { 894 ret = target_class; 895 found++; 896 } 897 } 898 899 /* The match was ambiguous, don't allow a cast */ 900 if (found > 1) { 901 ret = NULL; 902 } 903 } else if (type_is_ancestor(type, target_type)) { 904 ret = class; 905 } 906 907 return ret; 908 } 909 910 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, 911 const char *typename, 912 const char *file, int line, 913 const char *func) 914 { 915 ObjectClass *ret; 916 917 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)", 918 typename, file, line, func); 919 920 #ifdef CONFIG_QOM_CAST_DEBUG 921 int i; 922 923 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { 924 if (atomic_read(&class->class_cast_cache[i]) == typename) { 925 ret = class; 926 goto out; 927 } 928 } 929 #else 930 if (!class || !class->interfaces) { 931 return class; 932 } 933 #endif 934 935 ret = object_class_dynamic_cast(class, typename); 936 if (!ret && class) { 937 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 938 file, line, func, class, typename); 939 abort(); 940 } 941 942 #ifdef CONFIG_QOM_CAST_DEBUG 943 if (class && ret == class) { 944 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 945 atomic_set(&class->class_cast_cache[i - 1], 946 atomic_read(&class->class_cast_cache[i])); 947 } 948 atomic_set(&class->class_cast_cache[i - 1], typename); 949 } 950 out: 951 #endif 952 return ret; 953 } 954 955 const char *object_get_typename(const Object *obj) 956 { 957 return obj->class->type->name; 958 } 959 960 ObjectClass *object_get_class(Object *obj) 961 { 962 return obj->class; 963 } 964 965 bool object_class_is_abstract(ObjectClass *klass) 966 { 967 return klass->type->abstract; 968 } 969 970 const char *object_class_get_name(ObjectClass *klass) 971 { 972 return klass->type->name; 973 } 974 975 ObjectClass *object_class_by_name(const char *typename) 976 { 977 TypeImpl *type = type_get_by_name(typename); 978 979 if (!type) { 980 return NULL; 981 } 982 983 type_initialize(type); 984 985 return type->class; 986 } 987 988 ObjectClass *module_object_class_by_name(const char *typename) 989 { 990 ObjectClass *oc; 991 992 oc = object_class_by_name(typename); 993 #ifdef CONFIG_MODULES 994 if (!oc) { 995 module_load_qom_one(typename); 996 oc = object_class_by_name(typename); 997 } 998 #endif 999 return oc; 1000 } 1001 1002 ObjectClass *object_class_get_parent(ObjectClass *class) 1003 { 1004 TypeImpl *type = type_get_parent(class->type); 1005 1006 if (!type) { 1007 return NULL; 1008 } 1009 1010 type_initialize(type); 1011 1012 return type->class; 1013 } 1014 1015 typedef struct OCFData 1016 { 1017 void (*fn)(ObjectClass *klass, void *opaque); 1018 const char *implements_type; 1019 bool include_abstract; 1020 void *opaque; 1021 } OCFData; 1022 1023 static void object_class_foreach_tramp(gpointer key, gpointer value, 1024 gpointer opaque) 1025 { 1026 OCFData *data = opaque; 1027 TypeImpl *type = value; 1028 ObjectClass *k; 1029 1030 type_initialize(type); 1031 k = type->class; 1032 1033 if (!data->include_abstract && type->abstract) { 1034 return; 1035 } 1036 1037 if (data->implements_type && 1038 !object_class_dynamic_cast(k, data->implements_type)) { 1039 return; 1040 } 1041 1042 data->fn(k, data->opaque); 1043 } 1044 1045 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), 1046 const char *implements_type, bool include_abstract, 1047 void *opaque) 1048 { 1049 OCFData data = { fn, implements_type, include_abstract, opaque }; 1050 1051 enumerating_types = true; 1052 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); 1053 enumerating_types = false; 1054 } 1055 1056 static int do_object_child_foreach(Object *obj, 1057 int (*fn)(Object *child, void *opaque), 1058 void *opaque, bool recurse) 1059 { 1060 GHashTableIter iter; 1061 ObjectProperty *prop; 1062 int ret = 0; 1063 1064 g_hash_table_iter_init(&iter, obj->properties); 1065 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1066 if (object_property_is_child(prop)) { 1067 Object *child = prop->opaque; 1068 1069 ret = fn(child, opaque); 1070 if (ret != 0) { 1071 break; 1072 } 1073 if (recurse) { 1074 ret = do_object_child_foreach(child, fn, opaque, true); 1075 if (ret != 0) { 1076 break; 1077 } 1078 } 1079 } 1080 } 1081 return ret; 1082 } 1083 1084 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), 1085 void *opaque) 1086 { 1087 return do_object_child_foreach(obj, fn, opaque, false); 1088 } 1089 1090 int object_child_foreach_recursive(Object *obj, 1091 int (*fn)(Object *child, void *opaque), 1092 void *opaque) 1093 { 1094 return do_object_child_foreach(obj, fn, opaque, true); 1095 } 1096 1097 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) 1098 { 1099 GSList **list = opaque; 1100 1101 *list = g_slist_prepend(*list, klass); 1102 } 1103 1104 GSList *object_class_get_list(const char *implements_type, 1105 bool include_abstract) 1106 { 1107 GSList *list = NULL; 1108 1109 object_class_foreach(object_class_get_list_tramp, 1110 implements_type, include_abstract, &list); 1111 return list; 1112 } 1113 1114 static gint object_class_cmp(gconstpointer a, gconstpointer b) 1115 { 1116 return strcasecmp(object_class_get_name((ObjectClass *)a), 1117 object_class_get_name((ObjectClass *)b)); 1118 } 1119 1120 GSList *object_class_get_list_sorted(const char *implements_type, 1121 bool include_abstract) 1122 { 1123 return g_slist_sort(object_class_get_list(implements_type, include_abstract), 1124 object_class_cmp); 1125 } 1126 1127 Object *object_ref(void *objptr) 1128 { 1129 Object *obj = OBJECT(objptr); 1130 if (!obj) { 1131 return NULL; 1132 } 1133 atomic_inc(&obj->ref); 1134 return obj; 1135 } 1136 1137 void object_unref(void *objptr) 1138 { 1139 Object *obj = OBJECT(objptr); 1140 if (!obj) { 1141 return; 1142 } 1143 g_assert(obj->ref > 0); 1144 1145 /* parent always holds a reference to its children */ 1146 if (atomic_fetch_dec(&obj->ref) == 1) { 1147 object_finalize(obj); 1148 } 1149 } 1150 1151 ObjectProperty * 1152 object_property_try_add(Object *obj, const char *name, const char *type, 1153 ObjectPropertyAccessor *get, 1154 ObjectPropertyAccessor *set, 1155 ObjectPropertyRelease *release, 1156 void *opaque, Error **errp) 1157 { 1158 ObjectProperty *prop; 1159 size_t name_len = strlen(name); 1160 1161 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1162 int i; 1163 ObjectProperty *ret; 1164 char *name_no_array = g_strdup(name); 1165 1166 name_no_array[name_len - 3] = '\0'; 1167 for (i = 0; ; ++i) { 1168 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1169 1170 ret = object_property_try_add(obj, full_name, type, get, set, 1171 release, opaque, NULL); 1172 g_free(full_name); 1173 if (ret) { 1174 break; 1175 } 1176 } 1177 g_free(name_no_array); 1178 return ret; 1179 } 1180 1181 if (object_property_find(obj, name, NULL) != NULL) { 1182 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1183 name, object_get_typename(obj)); 1184 return NULL; 1185 } 1186 1187 prop = g_malloc0(sizeof(*prop)); 1188 1189 prop->name = g_strdup(name); 1190 prop->type = g_strdup(type); 1191 1192 prop->get = get; 1193 prop->set = set; 1194 prop->release = release; 1195 prop->opaque = opaque; 1196 1197 g_hash_table_insert(obj->properties, prop->name, prop); 1198 return prop; 1199 } 1200 1201 ObjectProperty * 1202 object_property_add(Object *obj, const char *name, const char *type, 1203 ObjectPropertyAccessor *get, 1204 ObjectPropertyAccessor *set, 1205 ObjectPropertyRelease *release, 1206 void *opaque) 1207 { 1208 return object_property_try_add(obj, name, type, get, set, release, 1209 opaque, &error_abort); 1210 } 1211 1212 ObjectProperty * 1213 object_class_property_add(ObjectClass *klass, 1214 const char *name, 1215 const char *type, 1216 ObjectPropertyAccessor *get, 1217 ObjectPropertyAccessor *set, 1218 ObjectPropertyRelease *release, 1219 void *opaque) 1220 { 1221 ObjectProperty *prop; 1222 1223 assert(!object_class_property_find(klass, name, NULL)); 1224 1225 prop = g_malloc0(sizeof(*prop)); 1226 1227 prop->name = g_strdup(name); 1228 prop->type = g_strdup(type); 1229 1230 prop->get = get; 1231 prop->set = set; 1232 prop->release = release; 1233 prop->opaque = opaque; 1234 1235 g_hash_table_insert(klass->properties, prop->name, prop); 1236 1237 return prop; 1238 } 1239 1240 ObjectProperty *object_property_find(Object *obj, const char *name, 1241 Error **errp) 1242 { 1243 ObjectProperty *prop; 1244 ObjectClass *klass = object_get_class(obj); 1245 1246 prop = object_class_property_find(klass, name, NULL); 1247 if (prop) { 1248 return prop; 1249 } 1250 1251 prop = g_hash_table_lookup(obj->properties, name); 1252 if (prop) { 1253 return prop; 1254 } 1255 1256 error_setg(errp, "Property '.%s' not found", name); 1257 return NULL; 1258 } 1259 1260 void object_property_iter_init(ObjectPropertyIterator *iter, 1261 Object *obj) 1262 { 1263 g_hash_table_iter_init(&iter->iter, obj->properties); 1264 iter->nextclass = object_get_class(obj); 1265 } 1266 1267 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1268 { 1269 gpointer key, val; 1270 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1271 if (!iter->nextclass) { 1272 return NULL; 1273 } 1274 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1275 iter->nextclass = object_class_get_parent(iter->nextclass); 1276 } 1277 return val; 1278 } 1279 1280 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1281 ObjectClass *klass) 1282 { 1283 g_hash_table_iter_init(&iter->iter, klass->properties); 1284 iter->nextclass = object_class_get_parent(klass); 1285 } 1286 1287 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name, 1288 Error **errp) 1289 { 1290 ObjectProperty *prop; 1291 ObjectClass *parent_klass; 1292 1293 parent_klass = object_class_get_parent(klass); 1294 if (parent_klass) { 1295 prop = object_class_property_find(parent_klass, name, NULL); 1296 if (prop) { 1297 return prop; 1298 } 1299 } 1300 1301 prop = g_hash_table_lookup(klass->properties, name); 1302 if (!prop) { 1303 error_setg(errp, "Property '.%s' not found", name); 1304 } 1305 return prop; 1306 } 1307 1308 void object_property_del(Object *obj, const char *name) 1309 { 1310 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1311 1312 if (prop->release) { 1313 prop->release(obj, name, prop->opaque); 1314 } 1315 g_hash_table_remove(obj->properties, name); 1316 } 1317 1318 bool object_property_get(Object *obj, const char *name, Visitor *v, 1319 Error **errp) 1320 { 1321 Error *err = NULL; 1322 ObjectProperty *prop = object_property_find(obj, name, errp); 1323 1324 if (prop == NULL) { 1325 return false; 1326 } 1327 1328 if (!prop->get) { 1329 error_setg(errp, QERR_PERMISSION_DENIED); 1330 return false; 1331 } 1332 prop->get(obj, v, name, prop->opaque, &err); 1333 error_propagate(errp, err); 1334 return !err; 1335 } 1336 1337 bool object_property_set(Object *obj, const char *name, Visitor *v, 1338 Error **errp) 1339 { 1340 Error *err = NULL; 1341 ObjectProperty *prop = object_property_find(obj, name, errp); 1342 1343 if (prop == NULL) { 1344 return false; 1345 } 1346 1347 if (!prop->set) { 1348 error_setg(errp, QERR_PERMISSION_DENIED); 1349 return false; 1350 } 1351 prop->set(obj, v, name, prop->opaque, &err); 1352 error_propagate(errp, err); 1353 return !err; 1354 } 1355 1356 bool object_property_set_str(Object *obj, const char *name, 1357 const char *value, Error **errp) 1358 { 1359 QString *qstr = qstring_from_str(value); 1360 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1361 1362 qobject_unref(qstr); 1363 return ok; 1364 } 1365 1366 char *object_property_get_str(Object *obj, const char *name, 1367 Error **errp) 1368 { 1369 QObject *ret = object_property_get_qobject(obj, name, errp); 1370 char *retval; 1371 1372 if (!ret) { 1373 return NULL; 1374 } 1375 1376 retval = g_strdup(qobject_get_try_str(ret)); 1377 if (!retval) { 1378 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1379 } 1380 1381 qobject_unref(ret); 1382 return retval; 1383 } 1384 1385 bool object_property_set_link(Object *obj, const char *name, 1386 Object *value, Error **errp) 1387 { 1388 g_autofree char *path = NULL; 1389 1390 if (value) { 1391 path = object_get_canonical_path(value); 1392 } 1393 return object_property_set_str(obj, name, path ?: "", errp); 1394 } 1395 1396 Object *object_property_get_link(Object *obj, const char *name, 1397 Error **errp) 1398 { 1399 char *str = object_property_get_str(obj, name, errp); 1400 Object *target = NULL; 1401 1402 if (str && *str) { 1403 target = object_resolve_path(str, NULL); 1404 if (!target) { 1405 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1406 "Device '%s' not found", str); 1407 } 1408 } 1409 1410 g_free(str); 1411 return target; 1412 } 1413 1414 bool object_property_set_bool(Object *obj, const char *name, 1415 bool value, Error **errp) 1416 { 1417 QBool *qbool = qbool_from_bool(value); 1418 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1419 1420 qobject_unref(qbool); 1421 return ok; 1422 } 1423 1424 bool object_property_get_bool(Object *obj, const char *name, 1425 Error **errp) 1426 { 1427 QObject *ret = object_property_get_qobject(obj, name, errp); 1428 QBool *qbool; 1429 bool retval; 1430 1431 if (!ret) { 1432 return false; 1433 } 1434 qbool = qobject_to(QBool, ret); 1435 if (!qbool) { 1436 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1437 retval = false; 1438 } else { 1439 retval = qbool_get_bool(qbool); 1440 } 1441 1442 qobject_unref(ret); 1443 return retval; 1444 } 1445 1446 bool object_property_set_int(Object *obj, const char *name, 1447 int64_t value, Error **errp) 1448 { 1449 QNum *qnum = qnum_from_int(value); 1450 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1451 1452 qobject_unref(qnum); 1453 return ok; 1454 } 1455 1456 int64_t object_property_get_int(Object *obj, const char *name, 1457 Error **errp) 1458 { 1459 QObject *ret = object_property_get_qobject(obj, name, errp); 1460 QNum *qnum; 1461 int64_t retval; 1462 1463 if (!ret) { 1464 return -1; 1465 } 1466 1467 qnum = qobject_to(QNum, ret); 1468 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1469 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1470 retval = -1; 1471 } 1472 1473 qobject_unref(ret); 1474 return retval; 1475 } 1476 1477 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1478 { 1479 Visitor *v = qobject_input_visitor_new(prop->defval); 1480 1481 assert(prop->set != NULL); 1482 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1483 1484 visit_free(v); 1485 } 1486 1487 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1488 { 1489 assert(!prop->defval); 1490 assert(!prop->init); 1491 1492 prop->defval = defval; 1493 prop->init = object_property_init_defval; 1494 } 1495 1496 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1497 { 1498 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1499 } 1500 1501 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1502 { 1503 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1504 } 1505 1506 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1507 { 1508 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1509 } 1510 1511 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1512 { 1513 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1514 } 1515 1516 bool object_property_set_uint(Object *obj, const char *name, 1517 uint64_t value, Error **errp) 1518 { 1519 QNum *qnum = qnum_from_uint(value); 1520 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1521 1522 qobject_unref(qnum); 1523 return ok; 1524 } 1525 1526 uint64_t object_property_get_uint(Object *obj, const char *name, 1527 Error **errp) 1528 { 1529 QObject *ret = object_property_get_qobject(obj, name, errp); 1530 QNum *qnum; 1531 uint64_t retval; 1532 1533 if (!ret) { 1534 return 0; 1535 } 1536 qnum = qobject_to(QNum, ret); 1537 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1538 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1539 retval = 0; 1540 } 1541 1542 qobject_unref(ret); 1543 return retval; 1544 } 1545 1546 typedef struct EnumProperty { 1547 const QEnumLookup *lookup; 1548 int (*get)(Object *, Error **); 1549 void (*set)(Object *, int, Error **); 1550 } EnumProperty; 1551 1552 int object_property_get_enum(Object *obj, const char *name, 1553 const char *typename, Error **errp) 1554 { 1555 char *str; 1556 int ret; 1557 ObjectProperty *prop = object_property_find(obj, name, errp); 1558 EnumProperty *enumprop; 1559 1560 if (prop == NULL) { 1561 return 0; 1562 } 1563 1564 if (!g_str_equal(prop->type, typename)) { 1565 error_setg(errp, "Property %s on %s is not '%s' enum type", 1566 name, object_class_get_name( 1567 object_get_class(obj)), typename); 1568 return 0; 1569 } 1570 1571 enumprop = prop->opaque; 1572 1573 str = object_property_get_str(obj, name, errp); 1574 if (!str) { 1575 return 0; 1576 } 1577 1578 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1579 g_free(str); 1580 1581 return ret; 1582 } 1583 1584 bool object_property_parse(Object *obj, const char *name, 1585 const char *string, Error **errp) 1586 { 1587 Visitor *v = string_input_visitor_new(string); 1588 bool ok = object_property_set(obj, name, v, errp); 1589 1590 visit_free(v); 1591 return ok; 1592 } 1593 1594 char *object_property_print(Object *obj, const char *name, bool human, 1595 Error **errp) 1596 { 1597 Visitor *v; 1598 char *string = NULL; 1599 1600 v = string_output_visitor_new(human, &string); 1601 if (!object_property_get(obj, name, v, errp)) { 1602 goto out; 1603 } 1604 1605 visit_complete(v, &string); 1606 1607 out: 1608 visit_free(v); 1609 return string; 1610 } 1611 1612 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1613 { 1614 ObjectProperty *prop = object_property_find(obj, name, errp); 1615 if (prop == NULL) { 1616 return NULL; 1617 } 1618 1619 return prop->type; 1620 } 1621 1622 Object *object_get_root(void) 1623 { 1624 static Object *root; 1625 1626 if (!root) { 1627 root = object_new("container"); 1628 } 1629 1630 return root; 1631 } 1632 1633 Object *object_get_objects_root(void) 1634 { 1635 return container_get(object_get_root(), "/objects"); 1636 } 1637 1638 Object *object_get_internal_root(void) 1639 { 1640 static Object *internal_root; 1641 1642 if (!internal_root) { 1643 internal_root = object_new("container"); 1644 } 1645 1646 return internal_root; 1647 } 1648 1649 static void object_get_child_property(Object *obj, Visitor *v, 1650 const char *name, void *opaque, 1651 Error **errp) 1652 { 1653 Object *child = opaque; 1654 char *path; 1655 1656 path = object_get_canonical_path(child); 1657 visit_type_str(v, name, &path, errp); 1658 g_free(path); 1659 } 1660 1661 static Object *object_resolve_child_property(Object *parent, void *opaque, 1662 const char *part) 1663 { 1664 return opaque; 1665 } 1666 1667 static void object_finalize_child_property(Object *obj, const char *name, 1668 void *opaque) 1669 { 1670 Object *child = opaque; 1671 1672 if (child->class->unparent) { 1673 (child->class->unparent)(child); 1674 } 1675 child->parent = NULL; 1676 object_unref(child); 1677 } 1678 1679 ObjectProperty * 1680 object_property_try_add_child(Object *obj, const char *name, 1681 Object *child, Error **errp) 1682 { 1683 g_autofree char *type = NULL; 1684 ObjectProperty *op; 1685 1686 assert(!child->parent); 1687 1688 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1689 1690 op = object_property_try_add(obj, name, type, object_get_child_property, 1691 NULL, object_finalize_child_property, 1692 child, errp); 1693 if (!op) { 1694 return NULL; 1695 } 1696 op->resolve = object_resolve_child_property; 1697 object_ref(child); 1698 child->parent = obj; 1699 return op; 1700 } 1701 1702 ObjectProperty * 1703 object_property_add_child(Object *obj, const char *name, 1704 Object *child) 1705 { 1706 return object_property_try_add_child(obj, name, child, &error_abort); 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 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1720 }; 1721 void (*check)(const Object *, const char *, Object *, Error **); 1722 ObjectPropertyLinkFlags flags; 1723 } LinkProperty; 1724 1725 static Object ** 1726 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1727 { 1728 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1729 return &lprop->target; 1730 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1731 return (void *)obj + lprop->offset; 1732 } else { 1733 return lprop->targetp; 1734 } 1735 } 1736 1737 static void object_get_link_property(Object *obj, Visitor *v, 1738 const char *name, void *opaque, 1739 Error **errp) 1740 { 1741 LinkProperty *lprop = opaque; 1742 Object **targetp = object_link_get_targetp(obj, lprop); 1743 char *path; 1744 1745 if (*targetp) { 1746 path = object_get_canonical_path(*targetp); 1747 visit_type_str(v, name, &path, errp); 1748 g_free(path); 1749 } else { 1750 path = (char *)""; 1751 visit_type_str(v, name, &path, errp); 1752 } 1753 } 1754 1755 /* 1756 * object_resolve_link: 1757 * 1758 * Lookup an object and ensure its type matches the link property type. This 1759 * is similar to object_resolve_path() except type verification against the 1760 * link property is performed. 1761 * 1762 * Returns: The matched object or NULL on path lookup failures. 1763 */ 1764 static Object *object_resolve_link(Object *obj, const char *name, 1765 const char *path, Error **errp) 1766 { 1767 const char *type; 1768 char *target_type; 1769 bool ambiguous = false; 1770 Object *target; 1771 1772 /* Go from link<FOO> to FOO. */ 1773 type = object_property_get_type(obj, name, NULL); 1774 target_type = g_strndup(&type[5], strlen(type) - 6); 1775 target = object_resolve_path_type(path, target_type, &ambiguous); 1776 1777 if (ambiguous) { 1778 error_setg(errp, "Path '%s' does not uniquely identify an object", 1779 path); 1780 } else if (!target) { 1781 target = object_resolve_path(path, &ambiguous); 1782 if (target || ambiguous) { 1783 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1784 } else { 1785 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1786 "Device '%s' not found", path); 1787 } 1788 target = NULL; 1789 } 1790 g_free(target_type); 1791 1792 return target; 1793 } 1794 1795 static void object_set_link_property(Object *obj, Visitor *v, 1796 const char *name, void *opaque, 1797 Error **errp) 1798 { 1799 Error *local_err = NULL; 1800 LinkProperty *prop = opaque; 1801 Object **targetp = object_link_get_targetp(obj, prop); 1802 Object *old_target = *targetp; 1803 Object *new_target; 1804 char *path = NULL; 1805 1806 if (!visit_type_str(v, name, &path, errp)) { 1807 return; 1808 } 1809 1810 if (*path) { 1811 new_target = object_resolve_link(obj, name, path, errp); 1812 if (!new_target) { 1813 g_free(path); 1814 return; 1815 } 1816 } else { 1817 new_target = NULL; 1818 } 1819 1820 g_free(path); 1821 1822 prop->check(obj, name, new_target, &local_err); 1823 if (local_err) { 1824 error_propagate(errp, local_err); 1825 return; 1826 } 1827 1828 *targetp = new_target; 1829 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1830 object_ref(new_target); 1831 object_unref(old_target); 1832 } 1833 } 1834 1835 static Object *object_resolve_link_property(Object *parent, void *opaque, 1836 const char *part) 1837 { 1838 LinkProperty *lprop = opaque; 1839 1840 return *object_link_get_targetp(parent, lprop); 1841 } 1842 1843 static void object_release_link_property(Object *obj, const char *name, 1844 void *opaque) 1845 { 1846 LinkProperty *prop = opaque; 1847 Object **targetp = object_link_get_targetp(obj, prop); 1848 1849 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1850 object_unref(*targetp); 1851 } 1852 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1853 g_free(prop); 1854 } 1855 } 1856 1857 static ObjectProperty * 1858 object_add_link_prop(Object *obj, const char *name, 1859 const char *type, void *ptr, 1860 void (*check)(const Object *, const char *, 1861 Object *, Error **), 1862 ObjectPropertyLinkFlags flags) 1863 { 1864 LinkProperty *prop = g_malloc(sizeof(*prop)); 1865 g_autofree char *full_type = NULL; 1866 ObjectProperty *op; 1867 1868 if (flags & OBJ_PROP_LINK_DIRECT) { 1869 prop->target = ptr; 1870 } else { 1871 prop->targetp = ptr; 1872 } 1873 prop->check = check; 1874 prop->flags = flags; 1875 1876 full_type = g_strdup_printf("link<%s>", type); 1877 1878 op = object_property_add(obj, name, full_type, 1879 object_get_link_property, 1880 check ? object_set_link_property : NULL, 1881 object_release_link_property, 1882 prop); 1883 op->resolve = object_resolve_link_property; 1884 return op; 1885 } 1886 1887 ObjectProperty * 1888 object_property_add_link(Object *obj, const char *name, 1889 const char *type, Object **targetp, 1890 void (*check)(const Object *, const char *, 1891 Object *, Error **), 1892 ObjectPropertyLinkFlags flags) 1893 { 1894 return object_add_link_prop(obj, name, type, targetp, check, flags); 1895 } 1896 1897 ObjectProperty * 1898 object_class_property_add_link(ObjectClass *oc, 1899 const char *name, 1900 const char *type, ptrdiff_t offset, 1901 void (*check)(const Object *obj, const char *name, 1902 Object *val, Error **errp), 1903 ObjectPropertyLinkFlags flags) 1904 { 1905 LinkProperty *prop = g_new0(LinkProperty, 1); 1906 char *full_type; 1907 ObjectProperty *op; 1908 1909 prop->offset = offset; 1910 prop->check = check; 1911 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1912 1913 full_type = g_strdup_printf("link<%s>", type); 1914 1915 op = object_class_property_add(oc, name, full_type, 1916 object_get_link_property, 1917 check ? object_set_link_property : NULL, 1918 object_release_link_property, 1919 prop); 1920 1921 op->resolve = object_resolve_link_property; 1922 1923 g_free(full_type); 1924 return op; 1925 } 1926 1927 ObjectProperty * 1928 object_property_add_const_link(Object *obj, const char *name, 1929 Object *target) 1930 { 1931 return object_add_link_prop(obj, name, 1932 object_get_typename(target), target, 1933 NULL, OBJ_PROP_LINK_DIRECT); 1934 } 1935 1936 const char *object_get_canonical_path_component(const Object *obj) 1937 { 1938 ObjectProperty *prop = NULL; 1939 GHashTableIter iter; 1940 1941 if (obj->parent == NULL) { 1942 return NULL; 1943 } 1944 1945 g_hash_table_iter_init(&iter, obj->parent->properties); 1946 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1947 if (!object_property_is_child(prop)) { 1948 continue; 1949 } 1950 1951 if (prop->opaque == obj) { 1952 return prop->name; 1953 } 1954 } 1955 1956 /* obj had a parent but was not a child, should never happen */ 1957 g_assert_not_reached(); 1958 return NULL; 1959 } 1960 1961 char *object_get_canonical_path(const Object *obj) 1962 { 1963 Object *root = object_get_root(); 1964 char *newpath, *path = NULL; 1965 1966 if (obj == root) { 1967 return g_strdup("/"); 1968 } 1969 1970 do { 1971 const char *component = object_get_canonical_path_component(obj); 1972 1973 if (!component) { 1974 /* A canonical path must be complete, so discard what was 1975 * collected so far. 1976 */ 1977 g_free(path); 1978 return NULL; 1979 } 1980 1981 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 1982 g_free(path); 1983 path = newpath; 1984 obj = obj->parent; 1985 } while (obj != root); 1986 1987 return path; 1988 } 1989 1990 Object *object_resolve_path_component(Object *parent, const char *part) 1991 { 1992 ObjectProperty *prop = object_property_find(parent, part, NULL); 1993 if (prop == NULL) { 1994 return NULL; 1995 } 1996 1997 if (prop->resolve) { 1998 return prop->resolve(parent, prop->opaque, part); 1999 } else { 2000 return NULL; 2001 } 2002 } 2003 2004 static Object *object_resolve_abs_path(Object *parent, 2005 char **parts, 2006 const char *typename) 2007 { 2008 Object *child; 2009 2010 if (*parts == NULL) { 2011 return object_dynamic_cast(parent, typename); 2012 } 2013 2014 if (strcmp(*parts, "") == 0) { 2015 return object_resolve_abs_path(parent, parts + 1, typename); 2016 } 2017 2018 child = object_resolve_path_component(parent, *parts); 2019 if (!child) { 2020 return NULL; 2021 } 2022 2023 return object_resolve_abs_path(child, parts + 1, typename); 2024 } 2025 2026 static Object *object_resolve_partial_path(Object *parent, 2027 char **parts, 2028 const char *typename, 2029 bool *ambiguous) 2030 { 2031 Object *obj; 2032 GHashTableIter iter; 2033 ObjectProperty *prop; 2034 2035 obj = object_resolve_abs_path(parent, parts, typename); 2036 2037 g_hash_table_iter_init(&iter, parent->properties); 2038 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2039 Object *found; 2040 2041 if (!object_property_is_child(prop)) { 2042 continue; 2043 } 2044 2045 found = object_resolve_partial_path(prop->opaque, parts, 2046 typename, ambiguous); 2047 if (found) { 2048 if (obj) { 2049 *ambiguous = true; 2050 return NULL; 2051 } 2052 obj = found; 2053 } 2054 2055 if (*ambiguous) { 2056 return NULL; 2057 } 2058 } 2059 2060 return obj; 2061 } 2062 2063 Object *object_resolve_path_type(const char *path, const char *typename, 2064 bool *ambiguousp) 2065 { 2066 Object *obj; 2067 char **parts; 2068 2069 parts = g_strsplit(path, "/", 0); 2070 assert(parts); 2071 2072 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2073 bool ambiguous = false; 2074 obj = object_resolve_partial_path(object_get_root(), parts, 2075 typename, &ambiguous); 2076 if (ambiguousp) { 2077 *ambiguousp = ambiguous; 2078 } 2079 } else { 2080 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2081 } 2082 2083 g_strfreev(parts); 2084 2085 return obj; 2086 } 2087 2088 Object *object_resolve_path(const char *path, bool *ambiguous) 2089 { 2090 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2091 } 2092 2093 typedef struct StringProperty 2094 { 2095 char *(*get)(Object *, Error **); 2096 void (*set)(Object *, const char *, Error **); 2097 } StringProperty; 2098 2099 static void property_get_str(Object *obj, Visitor *v, const char *name, 2100 void *opaque, Error **errp) 2101 { 2102 StringProperty *prop = opaque; 2103 char *value; 2104 Error *err = NULL; 2105 2106 value = prop->get(obj, &err); 2107 if (err) { 2108 error_propagate(errp, err); 2109 return; 2110 } 2111 2112 visit_type_str(v, name, &value, errp); 2113 g_free(value); 2114 } 2115 2116 static void property_set_str(Object *obj, Visitor *v, const char *name, 2117 void *opaque, Error **errp) 2118 { 2119 StringProperty *prop = opaque; 2120 char *value; 2121 2122 if (!visit_type_str(v, name, &value, errp)) { 2123 return; 2124 } 2125 2126 prop->set(obj, value, errp); 2127 g_free(value); 2128 } 2129 2130 static void property_release_str(Object *obj, const char *name, 2131 void *opaque) 2132 { 2133 StringProperty *prop = opaque; 2134 g_free(prop); 2135 } 2136 2137 ObjectProperty * 2138 object_property_add_str(Object *obj, const char *name, 2139 char *(*get)(Object *, Error **), 2140 void (*set)(Object *, const char *, Error **)) 2141 { 2142 StringProperty *prop = g_malloc0(sizeof(*prop)); 2143 2144 prop->get = get; 2145 prop->set = set; 2146 2147 return object_property_add(obj, name, "string", 2148 get ? property_get_str : NULL, 2149 set ? property_set_str : NULL, 2150 property_release_str, 2151 prop); 2152 } 2153 2154 ObjectProperty * 2155 object_class_property_add_str(ObjectClass *klass, const char *name, 2156 char *(*get)(Object *, Error **), 2157 void (*set)(Object *, const char *, 2158 Error **)) 2159 { 2160 StringProperty *prop = g_malloc0(sizeof(*prop)); 2161 2162 prop->get = get; 2163 prop->set = set; 2164 2165 return object_class_property_add(klass, name, "string", 2166 get ? property_get_str : NULL, 2167 set ? property_set_str : NULL, 2168 NULL, 2169 prop); 2170 } 2171 2172 typedef struct BoolProperty 2173 { 2174 bool (*get)(Object *, Error **); 2175 void (*set)(Object *, bool, Error **); 2176 } BoolProperty; 2177 2178 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2179 void *opaque, Error **errp) 2180 { 2181 BoolProperty *prop = opaque; 2182 bool value; 2183 Error *err = NULL; 2184 2185 value = prop->get(obj, &err); 2186 if (err) { 2187 error_propagate(errp, err); 2188 return; 2189 } 2190 2191 visit_type_bool(v, name, &value, errp); 2192 } 2193 2194 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2195 void *opaque, Error **errp) 2196 { 2197 BoolProperty *prop = opaque; 2198 bool value; 2199 2200 if (!visit_type_bool(v, name, &value, errp)) { 2201 return; 2202 } 2203 2204 prop->set(obj, value, errp); 2205 } 2206 2207 static void property_release_bool(Object *obj, const char *name, 2208 void *opaque) 2209 { 2210 BoolProperty *prop = opaque; 2211 g_free(prop); 2212 } 2213 2214 ObjectProperty * 2215 object_property_add_bool(Object *obj, const char *name, 2216 bool (*get)(Object *, Error **), 2217 void (*set)(Object *, bool, Error **)) 2218 { 2219 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2220 2221 prop->get = get; 2222 prop->set = set; 2223 2224 return object_property_add(obj, name, "bool", 2225 get ? property_get_bool : NULL, 2226 set ? property_set_bool : NULL, 2227 property_release_bool, 2228 prop); 2229 } 2230 2231 ObjectProperty * 2232 object_class_property_add_bool(ObjectClass *klass, const char *name, 2233 bool (*get)(Object *, Error **), 2234 void (*set)(Object *, bool, Error **)) 2235 { 2236 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2237 2238 prop->get = get; 2239 prop->set = set; 2240 2241 return object_class_property_add(klass, name, "bool", 2242 get ? property_get_bool : NULL, 2243 set ? property_set_bool : NULL, 2244 NULL, 2245 prop); 2246 } 2247 2248 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2249 void *opaque, Error **errp) 2250 { 2251 EnumProperty *prop = opaque; 2252 int value; 2253 Error *err = NULL; 2254 2255 value = prop->get(obj, &err); 2256 if (err) { 2257 error_propagate(errp, err); 2258 return; 2259 } 2260 2261 visit_type_enum(v, name, &value, prop->lookup, errp); 2262 } 2263 2264 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2265 void *opaque, Error **errp) 2266 { 2267 EnumProperty *prop = opaque; 2268 int value; 2269 2270 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2271 return; 2272 } 2273 prop->set(obj, value, errp); 2274 } 2275 2276 static void property_release_enum(Object *obj, const char *name, 2277 void *opaque) 2278 { 2279 EnumProperty *prop = opaque; 2280 g_free(prop); 2281 } 2282 2283 ObjectProperty * 2284 object_property_add_enum(Object *obj, const char *name, 2285 const char *typename, 2286 const QEnumLookup *lookup, 2287 int (*get)(Object *, Error **), 2288 void (*set)(Object *, int, Error **)) 2289 { 2290 EnumProperty *prop = g_malloc(sizeof(*prop)); 2291 2292 prop->lookup = lookup; 2293 prop->get = get; 2294 prop->set = set; 2295 2296 return object_property_add(obj, name, typename, 2297 get ? property_get_enum : NULL, 2298 set ? property_set_enum : NULL, 2299 property_release_enum, 2300 prop); 2301 } 2302 2303 ObjectProperty * 2304 object_class_property_add_enum(ObjectClass *klass, const char *name, 2305 const char *typename, 2306 const QEnumLookup *lookup, 2307 int (*get)(Object *, Error **), 2308 void (*set)(Object *, int, Error **)) 2309 { 2310 EnumProperty *prop = g_malloc(sizeof(*prop)); 2311 2312 prop->lookup = lookup; 2313 prop->get = get; 2314 prop->set = set; 2315 2316 return object_class_property_add(klass, name, typename, 2317 get ? property_get_enum : NULL, 2318 set ? property_set_enum : NULL, 2319 NULL, 2320 prop); 2321 } 2322 2323 typedef struct TMProperty { 2324 void (*get)(Object *, struct tm *, Error **); 2325 } TMProperty; 2326 2327 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2328 void *opaque, Error **errp) 2329 { 2330 TMProperty *prop = opaque; 2331 Error *err = NULL; 2332 struct tm value; 2333 2334 prop->get(obj, &value, &err); 2335 if (err) { 2336 error_propagate(errp, err); 2337 return; 2338 } 2339 2340 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2341 return; 2342 } 2343 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2344 goto out_end; 2345 } 2346 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2347 goto out_end; 2348 } 2349 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2350 goto out_end; 2351 } 2352 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2353 goto out_end; 2354 } 2355 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2356 goto out_end; 2357 } 2358 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2359 goto out_end; 2360 } 2361 visit_check_struct(v, errp); 2362 out_end: 2363 visit_end_struct(v, NULL); 2364 } 2365 2366 static void property_release_tm(Object *obj, const char *name, 2367 void *opaque) 2368 { 2369 TMProperty *prop = opaque; 2370 g_free(prop); 2371 } 2372 2373 ObjectProperty * 2374 object_property_add_tm(Object *obj, const char *name, 2375 void (*get)(Object *, struct tm *, Error **)) 2376 { 2377 TMProperty *prop = g_malloc0(sizeof(*prop)); 2378 2379 prop->get = get; 2380 2381 return object_property_add(obj, name, "struct tm", 2382 get ? property_get_tm : NULL, NULL, 2383 property_release_tm, 2384 prop); 2385 } 2386 2387 ObjectProperty * 2388 object_class_property_add_tm(ObjectClass *klass, const char *name, 2389 void (*get)(Object *, struct tm *, Error **)) 2390 { 2391 TMProperty *prop = g_malloc0(sizeof(*prop)); 2392 2393 prop->get = get; 2394 2395 return object_class_property_add(klass, name, "struct tm", 2396 get ? property_get_tm : NULL, 2397 NULL, NULL, prop); 2398 } 2399 2400 static char *object_get_type(Object *obj, Error **errp) 2401 { 2402 return g_strdup(object_get_typename(obj)); 2403 } 2404 2405 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2406 void *opaque, Error **errp) 2407 { 2408 uint8_t value = *(uint8_t *)opaque; 2409 visit_type_uint8(v, name, &value, errp); 2410 } 2411 2412 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2413 void *opaque, Error **errp) 2414 { 2415 uint8_t *field = opaque; 2416 uint8_t value; 2417 2418 if (!visit_type_uint8(v, name, &value, errp)) { 2419 return; 2420 } 2421 2422 *field = value; 2423 } 2424 2425 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2426 void *opaque, Error **errp) 2427 { 2428 uint16_t value = *(uint16_t *)opaque; 2429 visit_type_uint16(v, name, &value, errp); 2430 } 2431 2432 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2433 void *opaque, Error **errp) 2434 { 2435 uint16_t *field = opaque; 2436 uint16_t value; 2437 2438 if (!visit_type_uint16(v, name, &value, errp)) { 2439 return; 2440 } 2441 2442 *field = value; 2443 } 2444 2445 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2446 void *opaque, Error **errp) 2447 { 2448 uint32_t value = *(uint32_t *)opaque; 2449 visit_type_uint32(v, name, &value, errp); 2450 } 2451 2452 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2453 void *opaque, Error **errp) 2454 { 2455 uint32_t *field = opaque; 2456 uint32_t value; 2457 2458 if (!visit_type_uint32(v, name, &value, errp)) { 2459 return; 2460 } 2461 2462 *field = value; 2463 } 2464 2465 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2466 void *opaque, Error **errp) 2467 { 2468 uint64_t value = *(uint64_t *)opaque; 2469 visit_type_uint64(v, name, &value, errp); 2470 } 2471 2472 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2473 void *opaque, Error **errp) 2474 { 2475 uint64_t *field = opaque; 2476 uint64_t value; 2477 2478 if (!visit_type_uint64(v, name, &value, errp)) { 2479 return; 2480 } 2481 2482 *field = value; 2483 } 2484 2485 ObjectProperty * 2486 object_property_add_uint8_ptr(Object *obj, const char *name, 2487 const uint8_t *v, 2488 ObjectPropertyFlags flags) 2489 { 2490 ObjectPropertyAccessor *getter = NULL; 2491 ObjectPropertyAccessor *setter = NULL; 2492 2493 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2494 getter = property_get_uint8_ptr; 2495 } 2496 2497 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2498 setter = property_set_uint8_ptr; 2499 } 2500 2501 return object_property_add(obj, name, "uint8", 2502 getter, setter, NULL, (void *)v); 2503 } 2504 2505 ObjectProperty * 2506 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2507 const uint8_t *v, 2508 ObjectPropertyFlags flags) 2509 { 2510 ObjectPropertyAccessor *getter = NULL; 2511 ObjectPropertyAccessor *setter = NULL; 2512 2513 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2514 getter = property_get_uint8_ptr; 2515 } 2516 2517 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2518 setter = property_set_uint8_ptr; 2519 } 2520 2521 return object_class_property_add(klass, name, "uint8", 2522 getter, setter, NULL, (void *)v); 2523 } 2524 2525 ObjectProperty * 2526 object_property_add_uint16_ptr(Object *obj, const char *name, 2527 const uint16_t *v, 2528 ObjectPropertyFlags flags) 2529 { 2530 ObjectPropertyAccessor *getter = NULL; 2531 ObjectPropertyAccessor *setter = NULL; 2532 2533 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2534 getter = property_get_uint16_ptr; 2535 } 2536 2537 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2538 setter = property_set_uint16_ptr; 2539 } 2540 2541 return object_property_add(obj, name, "uint16", 2542 getter, setter, NULL, (void *)v); 2543 } 2544 2545 ObjectProperty * 2546 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2547 const uint16_t *v, 2548 ObjectPropertyFlags flags) 2549 { 2550 ObjectPropertyAccessor *getter = NULL; 2551 ObjectPropertyAccessor *setter = NULL; 2552 2553 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2554 getter = property_get_uint16_ptr; 2555 } 2556 2557 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2558 setter = property_set_uint16_ptr; 2559 } 2560 2561 return object_class_property_add(klass, name, "uint16", 2562 getter, setter, NULL, (void *)v); 2563 } 2564 2565 ObjectProperty * 2566 object_property_add_uint32_ptr(Object *obj, const char *name, 2567 const uint32_t *v, 2568 ObjectPropertyFlags flags) 2569 { 2570 ObjectPropertyAccessor *getter = NULL; 2571 ObjectPropertyAccessor *setter = NULL; 2572 2573 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2574 getter = property_get_uint32_ptr; 2575 } 2576 2577 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2578 setter = property_set_uint32_ptr; 2579 } 2580 2581 return object_property_add(obj, name, "uint32", 2582 getter, setter, NULL, (void *)v); 2583 } 2584 2585 ObjectProperty * 2586 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2587 const uint32_t *v, 2588 ObjectPropertyFlags flags) 2589 { 2590 ObjectPropertyAccessor *getter = NULL; 2591 ObjectPropertyAccessor *setter = NULL; 2592 2593 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2594 getter = property_get_uint32_ptr; 2595 } 2596 2597 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2598 setter = property_set_uint32_ptr; 2599 } 2600 2601 return object_class_property_add(klass, name, "uint32", 2602 getter, setter, NULL, (void *)v); 2603 } 2604 2605 ObjectProperty * 2606 object_property_add_uint64_ptr(Object *obj, const char *name, 2607 const uint64_t *v, 2608 ObjectPropertyFlags flags) 2609 { 2610 ObjectPropertyAccessor *getter = NULL; 2611 ObjectPropertyAccessor *setter = NULL; 2612 2613 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2614 getter = property_get_uint64_ptr; 2615 } 2616 2617 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2618 setter = property_set_uint64_ptr; 2619 } 2620 2621 return object_property_add(obj, name, "uint64", 2622 getter, setter, NULL, (void *)v); 2623 } 2624 2625 ObjectProperty * 2626 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2627 const uint64_t *v, 2628 ObjectPropertyFlags flags) 2629 { 2630 ObjectPropertyAccessor *getter = NULL; 2631 ObjectPropertyAccessor *setter = NULL; 2632 2633 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2634 getter = property_get_uint64_ptr; 2635 } 2636 2637 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2638 setter = property_set_uint64_ptr; 2639 } 2640 2641 return object_class_property_add(klass, name, "uint64", 2642 getter, setter, NULL, (void *)v); 2643 } 2644 2645 typedef struct { 2646 Object *target_obj; 2647 char *target_name; 2648 } AliasProperty; 2649 2650 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2651 void *opaque, Error **errp) 2652 { 2653 AliasProperty *prop = opaque; 2654 2655 object_property_get(prop->target_obj, prop->target_name, v, errp); 2656 } 2657 2658 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2659 void *opaque, Error **errp) 2660 { 2661 AliasProperty *prop = opaque; 2662 2663 object_property_set(prop->target_obj, prop->target_name, v, errp); 2664 } 2665 2666 static Object *property_resolve_alias(Object *obj, void *opaque, 2667 const char *part) 2668 { 2669 AliasProperty *prop = opaque; 2670 2671 return object_resolve_path_component(prop->target_obj, prop->target_name); 2672 } 2673 2674 static void property_release_alias(Object *obj, const char *name, void *opaque) 2675 { 2676 AliasProperty *prop = opaque; 2677 2678 g_free(prop->target_name); 2679 g_free(prop); 2680 } 2681 2682 ObjectProperty * 2683 object_property_add_alias(Object *obj, const char *name, 2684 Object *target_obj, const char *target_name) 2685 { 2686 AliasProperty *prop; 2687 ObjectProperty *op; 2688 ObjectProperty *target_prop; 2689 g_autofree char *prop_type = NULL; 2690 2691 target_prop = object_property_find(target_obj, target_name, 2692 &error_abort); 2693 2694 if (object_property_is_child(target_prop)) { 2695 prop_type = g_strdup_printf("link%s", 2696 target_prop->type + strlen("child")); 2697 } else { 2698 prop_type = g_strdup(target_prop->type); 2699 } 2700 2701 prop = g_malloc(sizeof(*prop)); 2702 prop->target_obj = target_obj; 2703 prop->target_name = g_strdup(target_name); 2704 2705 op = object_property_add(obj, name, prop_type, 2706 property_get_alias, 2707 property_set_alias, 2708 property_release_alias, 2709 prop); 2710 op->resolve = property_resolve_alias; 2711 if (target_prop->defval) { 2712 op->defval = qobject_ref(target_prop->defval); 2713 } 2714 2715 object_property_set_description(obj, op->name, 2716 target_prop->description); 2717 return op; 2718 } 2719 2720 void object_property_set_description(Object *obj, const char *name, 2721 const char *description) 2722 { 2723 ObjectProperty *op; 2724 2725 op = object_property_find(obj, name, &error_abort); 2726 g_free(op->description); 2727 op->description = g_strdup(description); 2728 } 2729 2730 void object_class_property_set_description(ObjectClass *klass, 2731 const char *name, 2732 const char *description) 2733 { 2734 ObjectProperty *op; 2735 2736 op = g_hash_table_lookup(klass->properties, name); 2737 g_free(op->description); 2738 op->description = g_strdup(description); 2739 } 2740 2741 static void object_class_init(ObjectClass *klass, void *data) 2742 { 2743 object_class_property_add_str(klass, "type", object_get_type, 2744 NULL); 2745 } 2746 2747 static void register_types(void) 2748 { 2749 static TypeInfo interface_info = { 2750 .name = TYPE_INTERFACE, 2751 .class_size = sizeof(InterfaceClass), 2752 .abstract = true, 2753 }; 2754 2755 static TypeInfo object_info = { 2756 .name = TYPE_OBJECT, 2757 .instance_size = sizeof(Object), 2758 .class_init = object_class_init, 2759 .abstract = true, 2760 }; 2761 2762 type_interface = type_register_internal(&interface_info); 2763 type_register_internal(&object_info); 2764 } 2765 2766 type_init(register_types) 2767