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(Object *obj) 1128 { 1129 if (!obj) { 1130 return NULL; 1131 } 1132 atomic_inc(&obj->ref); 1133 return obj; 1134 } 1135 1136 void object_unref(Object *obj) 1137 { 1138 if (!obj) { 1139 return; 1140 } 1141 g_assert(obj->ref > 0); 1142 1143 /* parent always holds a reference to its children */ 1144 if (atomic_fetch_dec(&obj->ref) == 1) { 1145 object_finalize(obj); 1146 } 1147 } 1148 1149 ObjectProperty * 1150 object_property_try_add(Object *obj, const char *name, const char *type, 1151 ObjectPropertyAccessor *get, 1152 ObjectPropertyAccessor *set, 1153 ObjectPropertyRelease *release, 1154 void *opaque, Error **errp) 1155 { 1156 ObjectProperty *prop; 1157 size_t name_len = strlen(name); 1158 1159 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1160 int i; 1161 ObjectProperty *ret; 1162 char *name_no_array = g_strdup(name); 1163 1164 name_no_array[name_len - 3] = '\0'; 1165 for (i = 0; ; ++i) { 1166 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1167 1168 ret = object_property_try_add(obj, full_name, type, get, set, 1169 release, opaque, NULL); 1170 g_free(full_name); 1171 if (ret) { 1172 break; 1173 } 1174 } 1175 g_free(name_no_array); 1176 return ret; 1177 } 1178 1179 if (object_property_find(obj, name, NULL) != NULL) { 1180 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1181 name, object_get_typename(obj)); 1182 return NULL; 1183 } 1184 1185 prop = g_malloc0(sizeof(*prop)); 1186 1187 prop->name = g_strdup(name); 1188 prop->type = g_strdup(type); 1189 1190 prop->get = get; 1191 prop->set = set; 1192 prop->release = release; 1193 prop->opaque = opaque; 1194 1195 g_hash_table_insert(obj->properties, prop->name, prop); 1196 return prop; 1197 } 1198 1199 ObjectProperty * 1200 object_property_add(Object *obj, const char *name, const char *type, 1201 ObjectPropertyAccessor *get, 1202 ObjectPropertyAccessor *set, 1203 ObjectPropertyRelease *release, 1204 void *opaque) 1205 { 1206 return object_property_try_add(obj, name, type, get, set, release, 1207 opaque, &error_abort); 1208 } 1209 1210 ObjectProperty * 1211 object_class_property_add(ObjectClass *klass, 1212 const char *name, 1213 const char *type, 1214 ObjectPropertyAccessor *get, 1215 ObjectPropertyAccessor *set, 1216 ObjectPropertyRelease *release, 1217 void *opaque) 1218 { 1219 ObjectProperty *prop; 1220 1221 assert(!object_class_property_find(klass, name, NULL)); 1222 1223 prop = g_malloc0(sizeof(*prop)); 1224 1225 prop->name = g_strdup(name); 1226 prop->type = g_strdup(type); 1227 1228 prop->get = get; 1229 prop->set = set; 1230 prop->release = release; 1231 prop->opaque = opaque; 1232 1233 g_hash_table_insert(klass->properties, prop->name, prop); 1234 1235 return prop; 1236 } 1237 1238 ObjectProperty *object_property_find(Object *obj, const char *name, 1239 Error **errp) 1240 { 1241 ObjectProperty *prop; 1242 ObjectClass *klass = object_get_class(obj); 1243 1244 prop = object_class_property_find(klass, name, NULL); 1245 if (prop) { 1246 return prop; 1247 } 1248 1249 prop = g_hash_table_lookup(obj->properties, name); 1250 if (prop) { 1251 return prop; 1252 } 1253 1254 error_setg(errp, "Property '.%s' not found", name); 1255 return NULL; 1256 } 1257 1258 void object_property_iter_init(ObjectPropertyIterator *iter, 1259 Object *obj) 1260 { 1261 g_hash_table_iter_init(&iter->iter, obj->properties); 1262 iter->nextclass = object_get_class(obj); 1263 } 1264 1265 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1266 { 1267 gpointer key, val; 1268 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1269 if (!iter->nextclass) { 1270 return NULL; 1271 } 1272 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1273 iter->nextclass = object_class_get_parent(iter->nextclass); 1274 } 1275 return val; 1276 } 1277 1278 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1279 ObjectClass *klass) 1280 { 1281 g_hash_table_iter_init(&iter->iter, klass->properties); 1282 iter->nextclass = object_class_get_parent(klass); 1283 } 1284 1285 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name, 1286 Error **errp) 1287 { 1288 ObjectProperty *prop; 1289 ObjectClass *parent_klass; 1290 1291 parent_klass = object_class_get_parent(klass); 1292 if (parent_klass) { 1293 prop = object_class_property_find(parent_klass, name, NULL); 1294 if (prop) { 1295 return prop; 1296 } 1297 } 1298 1299 prop = g_hash_table_lookup(klass->properties, name); 1300 if (!prop) { 1301 error_setg(errp, "Property '.%s' not found", name); 1302 } 1303 return prop; 1304 } 1305 1306 void object_property_del(Object *obj, const char *name) 1307 { 1308 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1309 1310 if (prop->release) { 1311 prop->release(obj, name, prop->opaque); 1312 } 1313 g_hash_table_remove(obj->properties, name); 1314 } 1315 1316 bool object_property_get(Object *obj, const char *name, Visitor *v, 1317 Error **errp) 1318 { 1319 Error *err = NULL; 1320 ObjectProperty *prop = object_property_find(obj, name, errp); 1321 1322 if (prop == NULL) { 1323 return false; 1324 } 1325 1326 if (!prop->get) { 1327 error_setg(errp, QERR_PERMISSION_DENIED); 1328 return false; 1329 } 1330 prop->get(obj, v, name, prop->opaque, &err); 1331 error_propagate(errp, err); 1332 return !err; 1333 } 1334 1335 bool object_property_set(Object *obj, const char *name, Visitor *v, 1336 Error **errp) 1337 { 1338 Error *err = NULL; 1339 ObjectProperty *prop = object_property_find(obj, name, errp); 1340 1341 if (prop == NULL) { 1342 return false; 1343 } 1344 1345 if (!prop->set) { 1346 error_setg(errp, QERR_PERMISSION_DENIED); 1347 return false; 1348 } 1349 prop->set(obj, v, name, prop->opaque, &err); 1350 error_propagate(errp, err); 1351 return !err; 1352 } 1353 1354 bool object_property_set_str(Object *obj, const char *name, 1355 const char *value, Error **errp) 1356 { 1357 QString *qstr = qstring_from_str(value); 1358 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1359 1360 qobject_unref(qstr); 1361 return ok; 1362 } 1363 1364 char *object_property_get_str(Object *obj, const char *name, 1365 Error **errp) 1366 { 1367 QObject *ret = object_property_get_qobject(obj, name, errp); 1368 char *retval; 1369 1370 if (!ret) { 1371 return NULL; 1372 } 1373 1374 retval = g_strdup(qobject_get_try_str(ret)); 1375 if (!retval) { 1376 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1377 } 1378 1379 qobject_unref(ret); 1380 return retval; 1381 } 1382 1383 bool object_property_set_link(Object *obj, const char *name, 1384 Object *value, Error **errp) 1385 { 1386 g_autofree char *path = NULL; 1387 1388 if (value) { 1389 path = object_get_canonical_path(value); 1390 } 1391 return object_property_set_str(obj, name, path ?: "", errp); 1392 } 1393 1394 Object *object_property_get_link(Object *obj, const char *name, 1395 Error **errp) 1396 { 1397 char *str = object_property_get_str(obj, name, errp); 1398 Object *target = NULL; 1399 1400 if (str && *str) { 1401 target = object_resolve_path(str, NULL); 1402 if (!target) { 1403 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1404 "Device '%s' not found", str); 1405 } 1406 } 1407 1408 g_free(str); 1409 return target; 1410 } 1411 1412 bool object_property_set_bool(Object *obj, const char *name, 1413 bool value, Error **errp) 1414 { 1415 QBool *qbool = qbool_from_bool(value); 1416 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1417 1418 qobject_unref(qbool); 1419 return ok; 1420 } 1421 1422 bool object_property_get_bool(Object *obj, const char *name, 1423 Error **errp) 1424 { 1425 QObject *ret = object_property_get_qobject(obj, name, errp); 1426 QBool *qbool; 1427 bool retval; 1428 1429 if (!ret) { 1430 return false; 1431 } 1432 qbool = qobject_to(QBool, ret); 1433 if (!qbool) { 1434 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1435 retval = false; 1436 } else { 1437 retval = qbool_get_bool(qbool); 1438 } 1439 1440 qobject_unref(ret); 1441 return retval; 1442 } 1443 1444 bool object_property_set_int(Object *obj, const char *name, 1445 int64_t value, Error **errp) 1446 { 1447 QNum *qnum = qnum_from_int(value); 1448 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1449 1450 qobject_unref(qnum); 1451 return ok; 1452 } 1453 1454 int64_t object_property_get_int(Object *obj, const char *name, 1455 Error **errp) 1456 { 1457 QObject *ret = object_property_get_qobject(obj, name, errp); 1458 QNum *qnum; 1459 int64_t retval; 1460 1461 if (!ret) { 1462 return -1; 1463 } 1464 1465 qnum = qobject_to(QNum, ret); 1466 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1467 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1468 retval = -1; 1469 } 1470 1471 qobject_unref(ret); 1472 return retval; 1473 } 1474 1475 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1476 { 1477 Visitor *v = qobject_input_visitor_new(prop->defval); 1478 1479 assert(prop->set != NULL); 1480 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1481 1482 visit_free(v); 1483 } 1484 1485 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1486 { 1487 assert(!prop->defval); 1488 assert(!prop->init); 1489 1490 prop->defval = defval; 1491 prop->init = object_property_init_defval; 1492 } 1493 1494 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1495 { 1496 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1497 } 1498 1499 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1500 { 1501 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1502 } 1503 1504 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1505 { 1506 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1507 } 1508 1509 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1510 { 1511 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1512 } 1513 1514 bool object_property_set_uint(Object *obj, const char *name, 1515 uint64_t value, Error **errp) 1516 { 1517 QNum *qnum = qnum_from_uint(value); 1518 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1519 1520 qobject_unref(qnum); 1521 return ok; 1522 } 1523 1524 uint64_t object_property_get_uint(Object *obj, const char *name, 1525 Error **errp) 1526 { 1527 QObject *ret = object_property_get_qobject(obj, name, errp); 1528 QNum *qnum; 1529 uint64_t retval; 1530 1531 if (!ret) { 1532 return 0; 1533 } 1534 qnum = qobject_to(QNum, ret); 1535 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1536 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1537 retval = 0; 1538 } 1539 1540 qobject_unref(ret); 1541 return retval; 1542 } 1543 1544 typedef struct EnumProperty { 1545 const QEnumLookup *lookup; 1546 int (*get)(Object *, Error **); 1547 void (*set)(Object *, int, Error **); 1548 } EnumProperty; 1549 1550 int object_property_get_enum(Object *obj, const char *name, 1551 const char *typename, Error **errp) 1552 { 1553 char *str; 1554 int ret; 1555 ObjectProperty *prop = object_property_find(obj, name, errp); 1556 EnumProperty *enumprop; 1557 1558 if (prop == NULL) { 1559 return 0; 1560 } 1561 1562 if (!g_str_equal(prop->type, typename)) { 1563 error_setg(errp, "Property %s on %s is not '%s' enum type", 1564 name, object_class_get_name( 1565 object_get_class(obj)), typename); 1566 return 0; 1567 } 1568 1569 enumprop = prop->opaque; 1570 1571 str = object_property_get_str(obj, name, errp); 1572 if (!str) { 1573 return 0; 1574 } 1575 1576 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1577 g_free(str); 1578 1579 return ret; 1580 } 1581 1582 bool object_property_parse(Object *obj, const char *name, 1583 const char *string, Error **errp) 1584 { 1585 Visitor *v = string_input_visitor_new(string); 1586 bool ok = object_property_set(obj, name, v, errp); 1587 1588 visit_free(v); 1589 return ok; 1590 } 1591 1592 char *object_property_print(Object *obj, const char *name, bool human, 1593 Error **errp) 1594 { 1595 Visitor *v; 1596 char *string = NULL; 1597 1598 v = string_output_visitor_new(human, &string); 1599 if (!object_property_get(obj, name, v, errp)) { 1600 goto out; 1601 } 1602 1603 visit_complete(v, &string); 1604 1605 out: 1606 visit_free(v); 1607 return string; 1608 } 1609 1610 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1611 { 1612 ObjectProperty *prop = object_property_find(obj, name, errp); 1613 if (prop == NULL) { 1614 return NULL; 1615 } 1616 1617 return prop->type; 1618 } 1619 1620 Object *object_get_root(void) 1621 { 1622 static Object *root; 1623 1624 if (!root) { 1625 root = object_new("container"); 1626 } 1627 1628 return root; 1629 } 1630 1631 Object *object_get_objects_root(void) 1632 { 1633 return container_get(object_get_root(), "/objects"); 1634 } 1635 1636 Object *object_get_internal_root(void) 1637 { 1638 static Object *internal_root; 1639 1640 if (!internal_root) { 1641 internal_root = object_new("container"); 1642 } 1643 1644 return internal_root; 1645 } 1646 1647 static void object_get_child_property(Object *obj, Visitor *v, 1648 const char *name, void *opaque, 1649 Error **errp) 1650 { 1651 Object *child = opaque; 1652 char *path; 1653 1654 path = object_get_canonical_path(child); 1655 visit_type_str(v, name, &path, errp); 1656 g_free(path); 1657 } 1658 1659 static Object *object_resolve_child_property(Object *parent, void *opaque, 1660 const char *part) 1661 { 1662 return opaque; 1663 } 1664 1665 static void object_finalize_child_property(Object *obj, const char *name, 1666 void *opaque) 1667 { 1668 Object *child = opaque; 1669 1670 if (child->class->unparent) { 1671 (child->class->unparent)(child); 1672 } 1673 child->parent = NULL; 1674 object_unref(child); 1675 } 1676 1677 ObjectProperty * 1678 object_property_try_add_child(Object *obj, const char *name, 1679 Object *child, Error **errp) 1680 { 1681 g_autofree char *type = NULL; 1682 ObjectProperty *op; 1683 1684 assert(!child->parent); 1685 1686 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1687 1688 op = object_property_try_add(obj, name, type, object_get_child_property, 1689 NULL, object_finalize_child_property, 1690 child, errp); 1691 if (!op) { 1692 return NULL; 1693 } 1694 op->resolve = object_resolve_child_property; 1695 object_ref(child); 1696 child->parent = obj; 1697 return op; 1698 } 1699 1700 ObjectProperty * 1701 object_property_add_child(Object *obj, const char *name, 1702 Object *child) 1703 { 1704 return object_property_try_add_child(obj, name, child, &error_abort); 1705 } 1706 1707 void object_property_allow_set_link(const Object *obj, const char *name, 1708 Object *val, Error **errp) 1709 { 1710 /* Allow the link to be set, always */ 1711 } 1712 1713 typedef struct { 1714 union { 1715 Object **targetp; 1716 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1717 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1718 }; 1719 void (*check)(const Object *, const char *, Object *, Error **); 1720 ObjectPropertyLinkFlags flags; 1721 } LinkProperty; 1722 1723 static Object ** 1724 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1725 { 1726 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1727 return &lprop->target; 1728 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1729 return (void *)obj + lprop->offset; 1730 } else { 1731 return lprop->targetp; 1732 } 1733 } 1734 1735 static void object_get_link_property(Object *obj, Visitor *v, 1736 const char *name, void *opaque, 1737 Error **errp) 1738 { 1739 LinkProperty *lprop = opaque; 1740 Object **targetp = object_link_get_targetp(obj, lprop); 1741 char *path; 1742 1743 if (*targetp) { 1744 path = object_get_canonical_path(*targetp); 1745 visit_type_str(v, name, &path, errp); 1746 g_free(path); 1747 } else { 1748 path = (char *)""; 1749 visit_type_str(v, name, &path, errp); 1750 } 1751 } 1752 1753 /* 1754 * object_resolve_link: 1755 * 1756 * Lookup an object and ensure its type matches the link property type. This 1757 * is similar to object_resolve_path() except type verification against the 1758 * link property is performed. 1759 * 1760 * Returns: The matched object or NULL on path lookup failures. 1761 */ 1762 static Object *object_resolve_link(Object *obj, const char *name, 1763 const char *path, Error **errp) 1764 { 1765 const char *type; 1766 char *target_type; 1767 bool ambiguous = false; 1768 Object *target; 1769 1770 /* Go from link<FOO> to FOO. */ 1771 type = object_property_get_type(obj, name, NULL); 1772 target_type = g_strndup(&type[5], strlen(type) - 6); 1773 target = object_resolve_path_type(path, target_type, &ambiguous); 1774 1775 if (ambiguous) { 1776 error_setg(errp, "Path '%s' does not uniquely identify an object", 1777 path); 1778 } else if (!target) { 1779 target = object_resolve_path(path, &ambiguous); 1780 if (target || ambiguous) { 1781 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1782 } else { 1783 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1784 "Device '%s' not found", path); 1785 } 1786 target = NULL; 1787 } 1788 g_free(target_type); 1789 1790 return target; 1791 } 1792 1793 static void object_set_link_property(Object *obj, Visitor *v, 1794 const char *name, void *opaque, 1795 Error **errp) 1796 { 1797 Error *local_err = NULL; 1798 LinkProperty *prop = opaque; 1799 Object **targetp = object_link_get_targetp(obj, prop); 1800 Object *old_target = *targetp; 1801 Object *new_target; 1802 char *path = NULL; 1803 1804 if (!visit_type_str(v, name, &path, errp)) { 1805 return; 1806 } 1807 1808 if (*path) { 1809 new_target = object_resolve_link(obj, name, path, errp); 1810 if (!new_target) { 1811 g_free(path); 1812 return; 1813 } 1814 } else { 1815 new_target = NULL; 1816 } 1817 1818 g_free(path); 1819 1820 prop->check(obj, name, new_target, &local_err); 1821 if (local_err) { 1822 error_propagate(errp, local_err); 1823 return; 1824 } 1825 1826 *targetp = new_target; 1827 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1828 object_ref(new_target); 1829 object_unref(old_target); 1830 } 1831 } 1832 1833 static Object *object_resolve_link_property(Object *parent, void *opaque, 1834 const char *part) 1835 { 1836 LinkProperty *lprop = opaque; 1837 1838 return *object_link_get_targetp(parent, lprop); 1839 } 1840 1841 static void object_release_link_property(Object *obj, const char *name, 1842 void *opaque) 1843 { 1844 LinkProperty *prop = opaque; 1845 Object **targetp = object_link_get_targetp(obj, prop); 1846 1847 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1848 object_unref(*targetp); 1849 } 1850 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1851 g_free(prop); 1852 } 1853 } 1854 1855 static ObjectProperty * 1856 object_add_link_prop(Object *obj, const char *name, 1857 const char *type, void *ptr, 1858 void (*check)(const Object *, const char *, 1859 Object *, Error **), 1860 ObjectPropertyLinkFlags flags) 1861 { 1862 LinkProperty *prop = g_malloc(sizeof(*prop)); 1863 g_autofree char *full_type = NULL; 1864 ObjectProperty *op; 1865 1866 if (flags & OBJ_PROP_LINK_DIRECT) { 1867 prop->target = ptr; 1868 } else { 1869 prop->targetp = ptr; 1870 } 1871 prop->check = check; 1872 prop->flags = flags; 1873 1874 full_type = g_strdup_printf("link<%s>", type); 1875 1876 op = object_property_add(obj, name, full_type, 1877 object_get_link_property, 1878 check ? object_set_link_property : NULL, 1879 object_release_link_property, 1880 prop); 1881 op->resolve = object_resolve_link_property; 1882 return op; 1883 } 1884 1885 ObjectProperty * 1886 object_property_add_link(Object *obj, const char *name, 1887 const char *type, Object **targetp, 1888 void (*check)(const Object *, const char *, 1889 Object *, Error **), 1890 ObjectPropertyLinkFlags flags) 1891 { 1892 return object_add_link_prop(obj, name, type, targetp, check, flags); 1893 } 1894 1895 ObjectProperty * 1896 object_class_property_add_link(ObjectClass *oc, 1897 const char *name, 1898 const char *type, ptrdiff_t offset, 1899 void (*check)(const Object *obj, const char *name, 1900 Object *val, Error **errp), 1901 ObjectPropertyLinkFlags flags) 1902 { 1903 LinkProperty *prop = g_new0(LinkProperty, 1); 1904 char *full_type; 1905 ObjectProperty *op; 1906 1907 prop->offset = offset; 1908 prop->check = check; 1909 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1910 1911 full_type = g_strdup_printf("link<%s>", type); 1912 1913 op = object_class_property_add(oc, name, full_type, 1914 object_get_link_property, 1915 check ? object_set_link_property : NULL, 1916 object_release_link_property, 1917 prop); 1918 1919 op->resolve = object_resolve_link_property; 1920 1921 g_free(full_type); 1922 return op; 1923 } 1924 1925 ObjectProperty * 1926 object_property_add_const_link(Object *obj, const char *name, 1927 Object *target) 1928 { 1929 return object_add_link_prop(obj, name, 1930 object_get_typename(target), target, 1931 NULL, OBJ_PROP_LINK_DIRECT); 1932 } 1933 1934 char *object_get_canonical_path_component(const Object *obj) 1935 { 1936 ObjectProperty *prop = NULL; 1937 GHashTableIter iter; 1938 1939 if (obj->parent == NULL) { 1940 return NULL; 1941 } 1942 1943 g_hash_table_iter_init(&iter, obj->parent->properties); 1944 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1945 if (!object_property_is_child(prop)) { 1946 continue; 1947 } 1948 1949 if (prop->opaque == obj) { 1950 return g_strdup(prop->name); 1951 } 1952 } 1953 1954 /* obj had a parent but was not a child, should never happen */ 1955 g_assert_not_reached(); 1956 return NULL; 1957 } 1958 1959 char *object_get_canonical_path(const Object *obj) 1960 { 1961 Object *root = object_get_root(); 1962 char *newpath, *path = NULL; 1963 1964 if (obj == root) { 1965 return g_strdup("/"); 1966 } 1967 1968 do { 1969 char *component = object_get_canonical_path_component(obj); 1970 1971 if (!component) { 1972 /* A canonical path must be complete, so discard what was 1973 * collected so far. 1974 */ 1975 g_free(path); 1976 return NULL; 1977 } 1978 1979 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 1980 g_free(path); 1981 g_free(component); 1982 path = newpath; 1983 obj = obj->parent; 1984 } while (obj != root); 1985 1986 return path; 1987 } 1988 1989 Object *object_resolve_path_component(Object *parent, const char *part) 1990 { 1991 ObjectProperty *prop = object_property_find(parent, part, NULL); 1992 if (prop == NULL) { 1993 return NULL; 1994 } 1995 1996 if (prop->resolve) { 1997 return prop->resolve(parent, prop->opaque, part); 1998 } else { 1999 return NULL; 2000 } 2001 } 2002 2003 static Object *object_resolve_abs_path(Object *parent, 2004 char **parts, 2005 const char *typename) 2006 { 2007 Object *child; 2008 2009 if (*parts == NULL) { 2010 return object_dynamic_cast(parent, typename); 2011 } 2012 2013 if (strcmp(*parts, "") == 0) { 2014 return object_resolve_abs_path(parent, parts + 1, typename); 2015 } 2016 2017 child = object_resolve_path_component(parent, *parts); 2018 if (!child) { 2019 return NULL; 2020 } 2021 2022 return object_resolve_abs_path(child, parts + 1, typename); 2023 } 2024 2025 static Object *object_resolve_partial_path(Object *parent, 2026 char **parts, 2027 const char *typename, 2028 bool *ambiguous) 2029 { 2030 Object *obj; 2031 GHashTableIter iter; 2032 ObjectProperty *prop; 2033 2034 obj = object_resolve_abs_path(parent, parts, typename); 2035 2036 g_hash_table_iter_init(&iter, parent->properties); 2037 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2038 Object *found; 2039 2040 if (!object_property_is_child(prop)) { 2041 continue; 2042 } 2043 2044 found = object_resolve_partial_path(prop->opaque, parts, 2045 typename, ambiguous); 2046 if (found) { 2047 if (obj) { 2048 *ambiguous = true; 2049 return NULL; 2050 } 2051 obj = found; 2052 } 2053 2054 if (*ambiguous) { 2055 return NULL; 2056 } 2057 } 2058 2059 return obj; 2060 } 2061 2062 Object *object_resolve_path_type(const char *path, const char *typename, 2063 bool *ambiguousp) 2064 { 2065 Object *obj; 2066 char **parts; 2067 2068 parts = g_strsplit(path, "/", 0); 2069 assert(parts); 2070 2071 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2072 bool ambiguous = false; 2073 obj = object_resolve_partial_path(object_get_root(), parts, 2074 typename, &ambiguous); 2075 if (ambiguousp) { 2076 *ambiguousp = ambiguous; 2077 } 2078 } else { 2079 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2080 } 2081 2082 g_strfreev(parts); 2083 2084 return obj; 2085 } 2086 2087 Object *object_resolve_path(const char *path, bool *ambiguous) 2088 { 2089 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2090 } 2091 2092 typedef struct StringProperty 2093 { 2094 char *(*get)(Object *, Error **); 2095 void (*set)(Object *, const char *, Error **); 2096 } StringProperty; 2097 2098 static void property_get_str(Object *obj, Visitor *v, const char *name, 2099 void *opaque, Error **errp) 2100 { 2101 StringProperty *prop = opaque; 2102 char *value; 2103 Error *err = NULL; 2104 2105 value = prop->get(obj, &err); 2106 if (err) { 2107 error_propagate(errp, err); 2108 return; 2109 } 2110 2111 visit_type_str(v, name, &value, errp); 2112 g_free(value); 2113 } 2114 2115 static void property_set_str(Object *obj, Visitor *v, const char *name, 2116 void *opaque, Error **errp) 2117 { 2118 StringProperty *prop = opaque; 2119 char *value; 2120 2121 if (!visit_type_str(v, name, &value, errp)) { 2122 return; 2123 } 2124 2125 prop->set(obj, value, errp); 2126 g_free(value); 2127 } 2128 2129 static void property_release_str(Object *obj, const char *name, 2130 void *opaque) 2131 { 2132 StringProperty *prop = opaque; 2133 g_free(prop); 2134 } 2135 2136 ObjectProperty * 2137 object_property_add_str(Object *obj, const char *name, 2138 char *(*get)(Object *, Error **), 2139 void (*set)(Object *, const char *, Error **)) 2140 { 2141 StringProperty *prop = g_malloc0(sizeof(*prop)); 2142 2143 prop->get = get; 2144 prop->set = set; 2145 2146 return object_property_add(obj, name, "string", 2147 get ? property_get_str : NULL, 2148 set ? property_set_str : NULL, 2149 property_release_str, 2150 prop); 2151 } 2152 2153 ObjectProperty * 2154 object_class_property_add_str(ObjectClass *klass, const char *name, 2155 char *(*get)(Object *, Error **), 2156 void (*set)(Object *, const char *, 2157 Error **)) 2158 { 2159 StringProperty *prop = g_malloc0(sizeof(*prop)); 2160 2161 prop->get = get; 2162 prop->set = set; 2163 2164 return object_class_property_add(klass, name, "string", 2165 get ? property_get_str : NULL, 2166 set ? property_set_str : NULL, 2167 NULL, 2168 prop); 2169 } 2170 2171 typedef struct BoolProperty 2172 { 2173 bool (*get)(Object *, Error **); 2174 void (*set)(Object *, bool, Error **); 2175 } BoolProperty; 2176 2177 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2178 void *opaque, Error **errp) 2179 { 2180 BoolProperty *prop = opaque; 2181 bool value; 2182 Error *err = NULL; 2183 2184 value = prop->get(obj, &err); 2185 if (err) { 2186 error_propagate(errp, err); 2187 return; 2188 } 2189 2190 visit_type_bool(v, name, &value, errp); 2191 } 2192 2193 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2194 void *opaque, Error **errp) 2195 { 2196 BoolProperty *prop = opaque; 2197 bool value; 2198 2199 if (!visit_type_bool(v, name, &value, errp)) { 2200 return; 2201 } 2202 2203 prop->set(obj, value, errp); 2204 } 2205 2206 static void property_release_bool(Object *obj, const char *name, 2207 void *opaque) 2208 { 2209 BoolProperty *prop = opaque; 2210 g_free(prop); 2211 } 2212 2213 ObjectProperty * 2214 object_property_add_bool(Object *obj, const char *name, 2215 bool (*get)(Object *, Error **), 2216 void (*set)(Object *, bool, Error **)) 2217 { 2218 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2219 2220 prop->get = get; 2221 prop->set = set; 2222 2223 return object_property_add(obj, name, "bool", 2224 get ? property_get_bool : NULL, 2225 set ? property_set_bool : NULL, 2226 property_release_bool, 2227 prop); 2228 } 2229 2230 ObjectProperty * 2231 object_class_property_add_bool(ObjectClass *klass, const char *name, 2232 bool (*get)(Object *, Error **), 2233 void (*set)(Object *, bool, Error **)) 2234 { 2235 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2236 2237 prop->get = get; 2238 prop->set = set; 2239 2240 return object_class_property_add(klass, name, "bool", 2241 get ? property_get_bool : NULL, 2242 set ? property_set_bool : NULL, 2243 NULL, 2244 prop); 2245 } 2246 2247 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2248 void *opaque, Error **errp) 2249 { 2250 EnumProperty *prop = opaque; 2251 int value; 2252 Error *err = NULL; 2253 2254 value = prop->get(obj, &err); 2255 if (err) { 2256 error_propagate(errp, err); 2257 return; 2258 } 2259 2260 visit_type_enum(v, name, &value, prop->lookup, errp); 2261 } 2262 2263 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2264 void *opaque, Error **errp) 2265 { 2266 EnumProperty *prop = opaque; 2267 int value; 2268 2269 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2270 return; 2271 } 2272 prop->set(obj, value, errp); 2273 } 2274 2275 static void property_release_enum(Object *obj, const char *name, 2276 void *opaque) 2277 { 2278 EnumProperty *prop = opaque; 2279 g_free(prop); 2280 } 2281 2282 ObjectProperty * 2283 object_property_add_enum(Object *obj, const char *name, 2284 const char *typename, 2285 const QEnumLookup *lookup, 2286 int (*get)(Object *, Error **), 2287 void (*set)(Object *, int, Error **)) 2288 { 2289 EnumProperty *prop = g_malloc(sizeof(*prop)); 2290 2291 prop->lookup = lookup; 2292 prop->get = get; 2293 prop->set = set; 2294 2295 return object_property_add(obj, name, typename, 2296 get ? property_get_enum : NULL, 2297 set ? property_set_enum : NULL, 2298 property_release_enum, 2299 prop); 2300 } 2301 2302 ObjectProperty * 2303 object_class_property_add_enum(ObjectClass *klass, const char *name, 2304 const char *typename, 2305 const QEnumLookup *lookup, 2306 int (*get)(Object *, Error **), 2307 void (*set)(Object *, int, Error **)) 2308 { 2309 EnumProperty *prop = g_malloc(sizeof(*prop)); 2310 2311 prop->lookup = lookup; 2312 prop->get = get; 2313 prop->set = set; 2314 2315 return object_class_property_add(klass, name, typename, 2316 get ? property_get_enum : NULL, 2317 set ? property_set_enum : NULL, 2318 NULL, 2319 prop); 2320 } 2321 2322 typedef struct TMProperty { 2323 void (*get)(Object *, struct tm *, Error **); 2324 } TMProperty; 2325 2326 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2327 void *opaque, Error **errp) 2328 { 2329 TMProperty *prop = opaque; 2330 Error *err = NULL; 2331 struct tm value; 2332 2333 prop->get(obj, &value, &err); 2334 if (err) { 2335 error_propagate(errp, err); 2336 return; 2337 } 2338 2339 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2340 return; 2341 } 2342 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2343 goto out_end; 2344 } 2345 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2346 goto out_end; 2347 } 2348 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2349 goto out_end; 2350 } 2351 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2352 goto out_end; 2353 } 2354 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2355 goto out_end; 2356 } 2357 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2358 goto out_end; 2359 } 2360 visit_check_struct(v, errp); 2361 out_end: 2362 visit_end_struct(v, NULL); 2363 } 2364 2365 static void property_release_tm(Object *obj, const char *name, 2366 void *opaque) 2367 { 2368 TMProperty *prop = opaque; 2369 g_free(prop); 2370 } 2371 2372 ObjectProperty * 2373 object_property_add_tm(Object *obj, const char *name, 2374 void (*get)(Object *, struct tm *, Error **)) 2375 { 2376 TMProperty *prop = g_malloc0(sizeof(*prop)); 2377 2378 prop->get = get; 2379 2380 return object_property_add(obj, name, "struct tm", 2381 get ? property_get_tm : NULL, NULL, 2382 property_release_tm, 2383 prop); 2384 } 2385 2386 ObjectProperty * 2387 object_class_property_add_tm(ObjectClass *klass, const char *name, 2388 void (*get)(Object *, struct tm *, Error **)) 2389 { 2390 TMProperty *prop = g_malloc0(sizeof(*prop)); 2391 2392 prop->get = get; 2393 2394 return object_class_property_add(klass, name, "struct tm", 2395 get ? property_get_tm : NULL, 2396 NULL, NULL, prop); 2397 } 2398 2399 static char *object_get_type(Object *obj, Error **errp) 2400 { 2401 return g_strdup(object_get_typename(obj)); 2402 } 2403 2404 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2405 void *opaque, Error **errp) 2406 { 2407 uint8_t value = *(uint8_t *)opaque; 2408 visit_type_uint8(v, name, &value, errp); 2409 } 2410 2411 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2412 void *opaque, Error **errp) 2413 { 2414 uint8_t *field = opaque; 2415 uint8_t value; 2416 2417 if (!visit_type_uint8(v, name, &value, errp)) { 2418 return; 2419 } 2420 2421 *field = value; 2422 } 2423 2424 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2425 void *opaque, Error **errp) 2426 { 2427 uint16_t value = *(uint16_t *)opaque; 2428 visit_type_uint16(v, name, &value, errp); 2429 } 2430 2431 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2432 void *opaque, Error **errp) 2433 { 2434 uint16_t *field = opaque; 2435 uint16_t value; 2436 2437 if (!visit_type_uint16(v, name, &value, errp)) { 2438 return; 2439 } 2440 2441 *field = value; 2442 } 2443 2444 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2445 void *opaque, Error **errp) 2446 { 2447 uint32_t value = *(uint32_t *)opaque; 2448 visit_type_uint32(v, name, &value, errp); 2449 } 2450 2451 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2452 void *opaque, Error **errp) 2453 { 2454 uint32_t *field = opaque; 2455 uint32_t value; 2456 2457 if (!visit_type_uint32(v, name, &value, errp)) { 2458 return; 2459 } 2460 2461 *field = value; 2462 } 2463 2464 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2465 void *opaque, Error **errp) 2466 { 2467 uint64_t value = *(uint64_t *)opaque; 2468 visit_type_uint64(v, name, &value, errp); 2469 } 2470 2471 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2472 void *opaque, Error **errp) 2473 { 2474 uint64_t *field = opaque; 2475 uint64_t value; 2476 2477 if (!visit_type_uint64(v, name, &value, errp)) { 2478 return; 2479 } 2480 2481 *field = value; 2482 } 2483 2484 ObjectProperty * 2485 object_property_add_uint8_ptr(Object *obj, const char *name, 2486 const uint8_t *v, 2487 ObjectPropertyFlags flags) 2488 { 2489 ObjectPropertyAccessor *getter = NULL; 2490 ObjectPropertyAccessor *setter = NULL; 2491 2492 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2493 getter = property_get_uint8_ptr; 2494 } 2495 2496 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2497 setter = property_set_uint8_ptr; 2498 } 2499 2500 return object_property_add(obj, name, "uint8", 2501 getter, setter, NULL, (void *)v); 2502 } 2503 2504 ObjectProperty * 2505 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2506 const uint8_t *v, 2507 ObjectPropertyFlags flags) 2508 { 2509 ObjectPropertyAccessor *getter = NULL; 2510 ObjectPropertyAccessor *setter = NULL; 2511 2512 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2513 getter = property_get_uint8_ptr; 2514 } 2515 2516 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2517 setter = property_set_uint8_ptr; 2518 } 2519 2520 return object_class_property_add(klass, name, "uint8", 2521 getter, setter, NULL, (void *)v); 2522 } 2523 2524 ObjectProperty * 2525 object_property_add_uint16_ptr(Object *obj, const char *name, 2526 const uint16_t *v, 2527 ObjectPropertyFlags flags) 2528 { 2529 ObjectPropertyAccessor *getter = NULL; 2530 ObjectPropertyAccessor *setter = NULL; 2531 2532 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2533 getter = property_get_uint16_ptr; 2534 } 2535 2536 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2537 setter = property_set_uint16_ptr; 2538 } 2539 2540 return object_property_add(obj, name, "uint16", 2541 getter, setter, NULL, (void *)v); 2542 } 2543 2544 ObjectProperty * 2545 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2546 const uint16_t *v, 2547 ObjectPropertyFlags flags) 2548 { 2549 ObjectPropertyAccessor *getter = NULL; 2550 ObjectPropertyAccessor *setter = NULL; 2551 2552 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2553 getter = property_get_uint16_ptr; 2554 } 2555 2556 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2557 setter = property_set_uint16_ptr; 2558 } 2559 2560 return object_class_property_add(klass, name, "uint16", 2561 getter, setter, NULL, (void *)v); 2562 } 2563 2564 ObjectProperty * 2565 object_property_add_uint32_ptr(Object *obj, const char *name, 2566 const uint32_t *v, 2567 ObjectPropertyFlags flags) 2568 { 2569 ObjectPropertyAccessor *getter = NULL; 2570 ObjectPropertyAccessor *setter = NULL; 2571 2572 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2573 getter = property_get_uint32_ptr; 2574 } 2575 2576 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2577 setter = property_set_uint32_ptr; 2578 } 2579 2580 return object_property_add(obj, name, "uint32", 2581 getter, setter, NULL, (void *)v); 2582 } 2583 2584 ObjectProperty * 2585 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2586 const uint32_t *v, 2587 ObjectPropertyFlags flags) 2588 { 2589 ObjectPropertyAccessor *getter = NULL; 2590 ObjectPropertyAccessor *setter = NULL; 2591 2592 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2593 getter = property_get_uint32_ptr; 2594 } 2595 2596 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2597 setter = property_set_uint32_ptr; 2598 } 2599 2600 return object_class_property_add(klass, name, "uint32", 2601 getter, setter, NULL, (void *)v); 2602 } 2603 2604 ObjectProperty * 2605 object_property_add_uint64_ptr(Object *obj, const char *name, 2606 const uint64_t *v, 2607 ObjectPropertyFlags flags) 2608 { 2609 ObjectPropertyAccessor *getter = NULL; 2610 ObjectPropertyAccessor *setter = NULL; 2611 2612 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2613 getter = property_get_uint64_ptr; 2614 } 2615 2616 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2617 setter = property_set_uint64_ptr; 2618 } 2619 2620 return object_property_add(obj, name, "uint64", 2621 getter, setter, NULL, (void *)v); 2622 } 2623 2624 ObjectProperty * 2625 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2626 const uint64_t *v, 2627 ObjectPropertyFlags flags) 2628 { 2629 ObjectPropertyAccessor *getter = NULL; 2630 ObjectPropertyAccessor *setter = NULL; 2631 2632 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2633 getter = property_get_uint64_ptr; 2634 } 2635 2636 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2637 setter = property_set_uint64_ptr; 2638 } 2639 2640 return object_class_property_add(klass, name, "uint64", 2641 getter, setter, NULL, (void *)v); 2642 } 2643 2644 typedef struct { 2645 Object *target_obj; 2646 char *target_name; 2647 } AliasProperty; 2648 2649 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2650 void *opaque, Error **errp) 2651 { 2652 AliasProperty *prop = opaque; 2653 2654 object_property_get(prop->target_obj, prop->target_name, v, errp); 2655 } 2656 2657 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2658 void *opaque, Error **errp) 2659 { 2660 AliasProperty *prop = opaque; 2661 2662 object_property_set(prop->target_obj, prop->target_name, v, errp); 2663 } 2664 2665 static Object *property_resolve_alias(Object *obj, void *opaque, 2666 const char *part) 2667 { 2668 AliasProperty *prop = opaque; 2669 2670 return object_resolve_path_component(prop->target_obj, prop->target_name); 2671 } 2672 2673 static void property_release_alias(Object *obj, const char *name, void *opaque) 2674 { 2675 AliasProperty *prop = opaque; 2676 2677 g_free(prop->target_name); 2678 g_free(prop); 2679 } 2680 2681 ObjectProperty * 2682 object_property_add_alias(Object *obj, const char *name, 2683 Object *target_obj, const char *target_name) 2684 { 2685 AliasProperty *prop; 2686 ObjectProperty *op; 2687 ObjectProperty *target_prop; 2688 g_autofree char *prop_type = NULL; 2689 2690 target_prop = object_property_find(target_obj, target_name, 2691 &error_abort); 2692 2693 if (object_property_is_child(target_prop)) { 2694 prop_type = g_strdup_printf("link%s", 2695 target_prop->type + strlen("child")); 2696 } else { 2697 prop_type = g_strdup(target_prop->type); 2698 } 2699 2700 prop = g_malloc(sizeof(*prop)); 2701 prop->target_obj = target_obj; 2702 prop->target_name = g_strdup(target_name); 2703 2704 op = object_property_add(obj, name, prop_type, 2705 property_get_alias, 2706 property_set_alias, 2707 property_release_alias, 2708 prop); 2709 op->resolve = property_resolve_alias; 2710 if (target_prop->defval) { 2711 op->defval = qobject_ref(target_prop->defval); 2712 } 2713 2714 object_property_set_description(obj, op->name, 2715 target_prop->description); 2716 return op; 2717 } 2718 2719 void object_property_set_description(Object *obj, const char *name, 2720 const char *description) 2721 { 2722 ObjectProperty *op; 2723 2724 op = object_property_find(obj, name, &error_abort); 2725 g_free(op->description); 2726 op->description = g_strdup(description); 2727 } 2728 2729 void object_class_property_set_description(ObjectClass *klass, 2730 const char *name, 2731 const char *description) 2732 { 2733 ObjectProperty *op; 2734 2735 op = g_hash_table_lookup(klass->properties, name); 2736 g_free(op->description); 2737 op->description = g_strdup(description); 2738 } 2739 2740 static void object_class_init(ObjectClass *klass, void *data) 2741 { 2742 object_class_property_add_str(klass, "type", object_get_type, 2743 NULL); 2744 } 2745 2746 static void register_types(void) 2747 { 2748 static TypeInfo interface_info = { 2749 .name = TYPE_INTERFACE, 2750 .class_size = sizeof(InterfaceClass), 2751 .abstract = true, 2752 }; 2753 2754 static TypeInfo object_info = { 2755 .name = TYPE_OBJECT, 2756 .instance_size = sizeof(Object), 2757 .class_init = object_class_init, 2758 .abstract = true, 2759 }; 2760 2761 type_interface = type_register_internal(&interface_info); 2762 type_register_internal(&object_info); 2763 } 2764 2765 type_init(register_types) 2766