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 size_t instance_align; 54 55 void (*class_init)(ObjectClass *klass, void *data); 56 void (*class_base_init)(ObjectClass *klass, void *data); 57 58 void *class_data; 59 60 void (*instance_init)(Object *obj); 61 void (*instance_post_init)(Object *obj); 62 void (*instance_finalize)(Object *obj); 63 64 bool abstract; 65 66 const char *parent; 67 TypeImpl *parent_type; 68 69 ObjectClass *class; 70 71 int num_interfaces; 72 InterfaceImpl interfaces[MAX_INTERFACES]; 73 }; 74 75 static Type type_interface; 76 77 static GHashTable *type_table_get(void) 78 { 79 static GHashTable *type_table; 80 81 if (type_table == NULL) { 82 type_table = g_hash_table_new(g_str_hash, g_str_equal); 83 } 84 85 return type_table; 86 } 87 88 static bool enumerating_types; 89 90 static void type_table_add(TypeImpl *ti) 91 { 92 assert(!enumerating_types); 93 g_hash_table_insert(type_table_get(), (void *)ti->name, ti); 94 } 95 96 static TypeImpl *type_table_lookup(const char *name) 97 { 98 return g_hash_table_lookup(type_table_get(), name); 99 } 100 101 static TypeImpl *type_new(const TypeInfo *info) 102 { 103 TypeImpl *ti = g_malloc0(sizeof(*ti)); 104 int i; 105 106 g_assert(info->name != NULL); 107 108 if (type_table_lookup(info->name) != NULL) { 109 fprintf(stderr, "Registering `%s' which already exists\n", info->name); 110 abort(); 111 } 112 113 ti->name = g_strdup(info->name); 114 ti->parent = g_strdup(info->parent); 115 116 ti->class_size = info->class_size; 117 ti->instance_size = info->instance_size; 118 ti->instance_align = info->instance_align; 119 120 ti->class_init = info->class_init; 121 ti->class_base_init = info->class_base_init; 122 ti->class_data = info->class_data; 123 124 ti->instance_init = info->instance_init; 125 ti->instance_post_init = info->instance_post_init; 126 ti->instance_finalize = info->instance_finalize; 127 128 ti->abstract = info->abstract; 129 130 for (i = 0; info->interfaces && info->interfaces[i].type; i++) { 131 ti->interfaces[i].typename = g_strdup(info->interfaces[i].type); 132 } 133 ti->num_interfaces = i; 134 135 return ti; 136 } 137 138 static TypeImpl *type_register_internal(const TypeInfo *info) 139 { 140 TypeImpl *ti; 141 ti = type_new(info); 142 143 type_table_add(ti); 144 return ti; 145 } 146 147 TypeImpl *type_register(const TypeInfo *info) 148 { 149 assert(info->parent); 150 return type_register_internal(info); 151 } 152 153 TypeImpl *type_register_static(const TypeInfo *info) 154 { 155 return type_register(info); 156 } 157 158 void type_register_static_array(const TypeInfo *infos, int nr_infos) 159 { 160 int i; 161 162 for (i = 0; i < nr_infos; i++) { 163 type_register_static(&infos[i]); 164 } 165 } 166 167 static TypeImpl *type_get_by_name(const char *name) 168 { 169 if (name == NULL) { 170 return NULL; 171 } 172 173 return type_table_lookup(name); 174 } 175 176 static TypeImpl *type_get_parent(TypeImpl *type) 177 { 178 if (!type->parent_type && type->parent) { 179 type->parent_type = type_get_by_name(type->parent); 180 if (!type->parent_type) { 181 fprintf(stderr, "Type '%s' is missing its parent '%s'\n", 182 type->name, type->parent); 183 abort(); 184 } 185 } 186 187 return type->parent_type; 188 } 189 190 static bool type_has_parent(TypeImpl *type) 191 { 192 return (type->parent != NULL); 193 } 194 195 static size_t type_class_get_size(TypeImpl *ti) 196 { 197 if (ti->class_size) { 198 return ti->class_size; 199 } 200 201 if (type_has_parent(ti)) { 202 return type_class_get_size(type_get_parent(ti)); 203 } 204 205 return sizeof(ObjectClass); 206 } 207 208 static size_t type_object_get_size(TypeImpl *ti) 209 { 210 if (ti->instance_size) { 211 return ti->instance_size; 212 } 213 214 if (type_has_parent(ti)) { 215 return type_object_get_size(type_get_parent(ti)); 216 } 217 218 return 0; 219 } 220 221 size_t object_type_get_instance_size(const char *typename) 222 { 223 TypeImpl *type = type_get_by_name(typename); 224 225 g_assert(type != NULL); 226 return type_object_get_size(type); 227 } 228 229 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) 230 { 231 assert(target_type); 232 233 /* Check if target_type is a direct ancestor of type */ 234 while (type) { 235 if (type == target_type) { 236 return true; 237 } 238 239 type = type_get_parent(type); 240 } 241 242 return false; 243 } 244 245 static void type_initialize(TypeImpl *ti); 246 247 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type, 248 TypeImpl *parent_type) 249 { 250 InterfaceClass *new_iface; 251 TypeInfo info = { }; 252 TypeImpl *iface_impl; 253 254 info.parent = parent_type->name; 255 info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name); 256 info.abstract = true; 257 258 iface_impl = type_new(&info); 259 iface_impl->parent_type = parent_type; 260 type_initialize(iface_impl); 261 g_free((char *)info.name); 262 263 new_iface = (InterfaceClass *)iface_impl->class; 264 new_iface->concrete_class = ti->class; 265 new_iface->interface_type = interface_type; 266 267 ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface); 268 } 269 270 static void object_property_free(gpointer data) 271 { 272 ObjectProperty *prop = data; 273 274 if (prop->defval) { 275 qobject_unref(prop->defval); 276 prop->defval = NULL; 277 } 278 g_free(prop->name); 279 g_free(prop->type); 280 g_free(prop->description); 281 g_free(prop); 282 } 283 284 static void type_initialize(TypeImpl *ti) 285 { 286 TypeImpl *parent; 287 288 if (ti->class) { 289 return; 290 } 291 292 ti->class_size = type_class_get_size(ti); 293 ti->instance_size = type_object_get_size(ti); 294 /* Any type with zero instance_size is implicitly abstract. 295 * This means interface types are all abstract. 296 */ 297 if (ti->instance_size == 0) { 298 ti->abstract = true; 299 } 300 if (type_is_ancestor(ti, type_interface)) { 301 assert(ti->instance_size == 0); 302 assert(ti->abstract); 303 assert(!ti->instance_init); 304 assert(!ti->instance_post_init); 305 assert(!ti->instance_finalize); 306 assert(!ti->num_interfaces); 307 } 308 ti->class = g_malloc0(ti->class_size); 309 310 parent = type_get_parent(ti); 311 if (parent) { 312 type_initialize(parent); 313 GSList *e; 314 int i; 315 316 g_assert(parent->class_size <= ti->class_size); 317 g_assert(parent->instance_size <= ti->instance_size); 318 memcpy(ti->class, parent->class, parent->class_size); 319 ti->class->interfaces = NULL; 320 321 for (e = parent->class->interfaces; e; e = e->next) { 322 InterfaceClass *iface = e->data; 323 ObjectClass *klass = OBJECT_CLASS(iface); 324 325 type_initialize_interface(ti, iface->interface_type, klass->type); 326 } 327 328 for (i = 0; i < ti->num_interfaces; i++) { 329 TypeImpl *t = type_get_by_name(ti->interfaces[i].typename); 330 if (!t) { 331 error_report("missing interface '%s' for object '%s'", 332 ti->interfaces[i].typename, parent->name); 333 abort(); 334 } 335 for (e = ti->class->interfaces; e; e = e->next) { 336 TypeImpl *target_type = OBJECT_CLASS(e->data)->type; 337 338 if (type_is_ancestor(target_type, t)) { 339 break; 340 } 341 } 342 343 if (e) { 344 continue; 345 } 346 347 type_initialize_interface(ti, t, t); 348 } 349 } 350 351 ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, 352 object_property_free); 353 354 ti->class->type = ti; 355 356 while (parent) { 357 if (parent->class_base_init) { 358 parent->class_base_init(ti->class, ti->class_data); 359 } 360 parent = type_get_parent(parent); 361 } 362 363 if (ti->class_init) { 364 ti->class_init(ti->class, ti->class_data); 365 } 366 } 367 368 static void object_init_with_type(Object *obj, TypeImpl *ti) 369 { 370 if (type_has_parent(ti)) { 371 object_init_with_type(obj, type_get_parent(ti)); 372 } 373 374 if (ti->instance_init) { 375 ti->instance_init(obj); 376 } 377 } 378 379 static void object_post_init_with_type(Object *obj, TypeImpl *ti) 380 { 381 if (ti->instance_post_init) { 382 ti->instance_post_init(obj); 383 } 384 385 if (type_has_parent(ti)) { 386 object_post_init_with_type(obj, type_get_parent(ti)); 387 } 388 } 389 390 bool object_apply_global_props(Object *obj, const GPtrArray *props, 391 Error **errp) 392 { 393 int i; 394 395 if (!props) { 396 return true; 397 } 398 399 for (i = 0; i < props->len; i++) { 400 GlobalProperty *p = g_ptr_array_index(props, i); 401 Error *err = NULL; 402 403 if (object_dynamic_cast(obj, p->driver) == NULL) { 404 continue; 405 } 406 if (p->optional && !object_property_find(obj, p->property)) { 407 continue; 408 } 409 p->used = true; 410 if (!object_property_parse(obj, p->property, p->value, &err)) { 411 error_prepend(&err, "can't apply global %s.%s=%s: ", 412 p->driver, p->property, p->value); 413 /* 414 * If errp != NULL, propagate error and return. 415 * If errp == NULL, report a warning, but keep going 416 * with the remaining globals. 417 */ 418 if (errp) { 419 error_propagate(errp, err); 420 return false; 421 } else { 422 warn_report_err(err); 423 } 424 } 425 } 426 427 return true; 428 } 429 430 /* 431 * Global property defaults 432 * Slot 0: accelerator's global property defaults 433 * Slot 1: machine's global property defaults 434 * Slot 2: global properties from legacy command line option 435 * Each is a GPtrArray of of GlobalProperty. 436 * Applied in order, later entries override earlier ones. 437 */ 438 static GPtrArray *object_compat_props[3]; 439 440 /* 441 * Retrieve @GPtrArray for global property defined with options 442 * other than "-global". These are generally used for syntactic 443 * sugar and legacy command line options. 444 */ 445 void object_register_sugar_prop(const char *driver, const char *prop, const char *value) 446 { 447 GlobalProperty *g; 448 if (!object_compat_props[2]) { 449 object_compat_props[2] = g_ptr_array_new(); 450 } 451 g = g_new0(GlobalProperty, 1); 452 g->driver = g_strdup(driver); 453 g->property = g_strdup(prop); 454 g->value = g_strdup(value); 455 g_ptr_array_add(object_compat_props[2], g); 456 } 457 458 /* 459 * Set machine's global property defaults to @compat_props. 460 * May be called at most once. 461 */ 462 void object_set_machine_compat_props(GPtrArray *compat_props) 463 { 464 assert(!object_compat_props[1]); 465 object_compat_props[1] = compat_props; 466 } 467 468 /* 469 * Set accelerator's global property defaults to @compat_props. 470 * May be called at most once. 471 */ 472 void object_set_accelerator_compat_props(GPtrArray *compat_props) 473 { 474 assert(!object_compat_props[0]); 475 object_compat_props[0] = compat_props; 476 } 477 478 void object_apply_compat_props(Object *obj) 479 { 480 int i; 481 482 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) { 483 object_apply_global_props(obj, object_compat_props[i], 484 i == 2 ? &error_fatal : &error_abort); 485 } 486 } 487 488 static void object_class_property_init_all(Object *obj) 489 { 490 ObjectPropertyIterator iter; 491 ObjectProperty *prop; 492 493 object_class_property_iter_init(&iter, object_get_class(obj)); 494 while ((prop = object_property_iter_next(&iter))) { 495 if (prop->init) { 496 prop->init(obj, prop); 497 } 498 } 499 } 500 501 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type) 502 { 503 type_initialize(type); 504 505 g_assert(type->instance_size >= sizeof(Object)); 506 g_assert(type->abstract == false); 507 g_assert(size >= type->instance_size); 508 509 memset(obj, 0, type->instance_size); 510 obj->class = type->class; 511 object_ref(obj); 512 object_class_property_init_all(obj); 513 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal, 514 NULL, object_property_free); 515 object_init_with_type(obj, type); 516 object_post_init_with_type(obj, type); 517 } 518 519 void object_initialize(void *data, size_t size, const char *typename) 520 { 521 TypeImpl *type = type_get_by_name(typename); 522 523 #ifdef CONFIG_MODULES 524 if (!type) { 525 module_load_qom_one(typename); 526 type = type_get_by_name(typename); 527 } 528 #endif 529 if (!type) { 530 error_report("missing object type '%s'", typename); 531 abort(); 532 } 533 534 object_initialize_with_type(data, size, type); 535 } 536 537 bool object_initialize_child_with_props(Object *parentobj, 538 const char *propname, 539 void *childobj, size_t size, 540 const char *type, 541 Error **errp, ...) 542 { 543 va_list vargs; 544 bool ok; 545 546 va_start(vargs, errp); 547 ok = object_initialize_child_with_propsv(parentobj, propname, 548 childobj, size, type, errp, 549 vargs); 550 va_end(vargs); 551 return ok; 552 } 553 554 bool object_initialize_child_with_propsv(Object *parentobj, 555 const char *propname, 556 void *childobj, size_t size, 557 const char *type, 558 Error **errp, va_list vargs) 559 { 560 bool ok = false; 561 Object *obj; 562 UserCreatable *uc; 563 564 object_initialize(childobj, size, type); 565 obj = OBJECT(childobj); 566 567 if (!object_set_propv(obj, errp, vargs)) { 568 goto out; 569 } 570 571 object_property_add_child(parentobj, propname, obj); 572 573 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 574 if (uc) { 575 if (!user_creatable_complete(uc, errp)) { 576 object_unparent(obj); 577 goto out; 578 } 579 } 580 581 ok = true; 582 583 out: 584 /* 585 * We want @obj's reference to be 1 on success, 0 on failure. 586 * On success, it's 2: one taken by object_initialize(), and one 587 * by object_property_add_child(). 588 * On failure in object_initialize() or earlier, it's 1. 589 * On failure afterwards, it's also 1: object_unparent() releases 590 * the reference taken by object_property_add_child(). 591 */ 592 object_unref(obj); 593 return ok; 594 } 595 596 void object_initialize_child_internal(Object *parent, 597 const char *propname, 598 void *child, size_t size, 599 const char *type) 600 { 601 object_initialize_child_with_props(parent, propname, child, size, type, 602 &error_abort, NULL); 603 } 604 605 static inline bool object_property_is_child(ObjectProperty *prop) 606 { 607 return strstart(prop->type, "child<", NULL); 608 } 609 610 static void object_property_del_all(Object *obj) 611 { 612 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL); 613 ObjectProperty *prop; 614 ObjectPropertyIterator iter; 615 bool released; 616 617 do { 618 released = false; 619 object_property_iter_init(&iter, obj); 620 while ((prop = object_property_iter_next(&iter)) != NULL) { 621 if (g_hash_table_add(done, prop)) { 622 if (prop->release) { 623 prop->release(obj, prop->name, prop->opaque); 624 released = true; 625 break; 626 } 627 } 628 } 629 } while (released); 630 631 g_hash_table_unref(obj->properties); 632 } 633 634 static void object_property_del_child(Object *obj, Object *child) 635 { 636 ObjectProperty *prop; 637 GHashTableIter iter; 638 gpointer key, value; 639 640 g_hash_table_iter_init(&iter, obj->properties); 641 while (g_hash_table_iter_next(&iter, &key, &value)) { 642 prop = value; 643 if (object_property_is_child(prop) && prop->opaque == child) { 644 if (prop->release) { 645 prop->release(obj, prop->name, prop->opaque); 646 prop->release = NULL; 647 } 648 break; 649 } 650 } 651 g_hash_table_iter_init(&iter, obj->properties); 652 while (g_hash_table_iter_next(&iter, &key, &value)) { 653 prop = value; 654 if (object_property_is_child(prop) && prop->opaque == child) { 655 g_hash_table_iter_remove(&iter); 656 break; 657 } 658 } 659 } 660 661 void object_unparent(Object *obj) 662 { 663 if (obj->parent) { 664 object_property_del_child(obj->parent, obj); 665 } 666 } 667 668 static void object_deinit(Object *obj, TypeImpl *type) 669 { 670 if (type->instance_finalize) { 671 type->instance_finalize(obj); 672 } 673 674 if (type_has_parent(type)) { 675 object_deinit(obj, type_get_parent(type)); 676 } 677 } 678 679 static void object_finalize(void *data) 680 { 681 Object *obj = data; 682 TypeImpl *ti = obj->class->type; 683 684 object_property_del_all(obj); 685 object_deinit(obj, ti); 686 687 g_assert(obj->ref == 0); 688 g_assert(obj->parent == NULL); 689 if (obj->free) { 690 obj->free(obj); 691 } 692 } 693 694 /* Find the minimum alignment guaranteed by the system malloc. */ 695 #if __STDC_VERSION__ >= 201112L 696 typddef max_align_t qemu_max_align_t; 697 #else 698 typedef union { 699 long l; 700 void *p; 701 double d; 702 long double ld; 703 } qemu_max_align_t; 704 #endif 705 706 static Object *object_new_with_type(Type type) 707 { 708 Object *obj; 709 size_t size, align; 710 void (*obj_free)(void *); 711 712 g_assert(type != NULL); 713 type_initialize(type); 714 715 size = type->instance_size; 716 align = type->instance_align; 717 718 /* 719 * Do not use qemu_memalign unless required. Depending on the 720 * implementation, extra alignment implies extra overhead. 721 */ 722 if (likely(align <= __alignof__(qemu_max_align_t))) { 723 obj = g_malloc(size); 724 obj_free = g_free; 725 } else { 726 obj = qemu_memalign(align, size); 727 obj_free = qemu_vfree; 728 } 729 730 object_initialize_with_type(obj, size, type); 731 obj->free = obj_free; 732 733 return obj; 734 } 735 736 Object *object_new_with_class(ObjectClass *klass) 737 { 738 return object_new_with_type(klass->type); 739 } 740 741 Object *object_new(const char *typename) 742 { 743 TypeImpl *ti = type_get_by_name(typename); 744 745 return object_new_with_type(ti); 746 } 747 748 749 Object *object_new_with_props(const char *typename, 750 Object *parent, 751 const char *id, 752 Error **errp, 753 ...) 754 { 755 va_list vargs; 756 Object *obj; 757 758 va_start(vargs, errp); 759 obj = object_new_with_propv(typename, parent, id, errp, vargs); 760 va_end(vargs); 761 762 return obj; 763 } 764 765 766 Object *object_new_with_propv(const char *typename, 767 Object *parent, 768 const char *id, 769 Error **errp, 770 va_list vargs) 771 { 772 Object *obj; 773 ObjectClass *klass; 774 UserCreatable *uc; 775 776 klass = object_class_by_name(typename); 777 if (!klass) { 778 error_setg(errp, "invalid object type: %s", typename); 779 return NULL; 780 } 781 782 if (object_class_is_abstract(klass)) { 783 error_setg(errp, "object type '%s' is abstract", typename); 784 return NULL; 785 } 786 obj = object_new_with_type(klass->type); 787 788 if (!object_set_propv(obj, errp, vargs)) { 789 goto error; 790 } 791 792 if (id != NULL) { 793 object_property_add_child(parent, id, obj); 794 } 795 796 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 797 if (uc) { 798 if (!user_creatable_complete(uc, errp)) { 799 if (id != NULL) { 800 object_unparent(obj); 801 } 802 goto error; 803 } 804 } 805 806 object_unref(obj); 807 return obj; 808 809 error: 810 object_unref(obj); 811 return NULL; 812 } 813 814 815 bool object_set_props(Object *obj, 816 Error **errp, 817 ...) 818 { 819 va_list vargs; 820 bool ret; 821 822 va_start(vargs, errp); 823 ret = object_set_propv(obj, errp, vargs); 824 va_end(vargs); 825 826 return ret; 827 } 828 829 830 bool object_set_propv(Object *obj, 831 Error **errp, 832 va_list vargs) 833 { 834 const char *propname; 835 836 propname = va_arg(vargs, char *); 837 while (propname != NULL) { 838 const char *value = va_arg(vargs, char *); 839 840 g_assert(value != NULL); 841 if (!object_property_parse(obj, propname, value, errp)) { 842 return false; 843 } 844 propname = va_arg(vargs, char *); 845 } 846 847 return true; 848 } 849 850 851 Object *object_dynamic_cast(Object *obj, const char *typename) 852 { 853 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) { 854 return obj; 855 } 856 857 return NULL; 858 } 859 860 Object *object_dynamic_cast_assert(Object *obj, const char *typename, 861 const char *file, int line, const char *func) 862 { 863 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)", 864 typename, file, line, func); 865 866 #ifdef CONFIG_QOM_CAST_DEBUG 867 int i; 868 Object *inst; 869 870 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) { 871 if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) { 872 goto out; 873 } 874 } 875 876 inst = object_dynamic_cast(obj, typename); 877 878 if (!inst && obj) { 879 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 880 file, line, func, obj, typename); 881 abort(); 882 } 883 884 assert(obj == inst); 885 886 if (obj && obj == inst) { 887 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 888 qatomic_set(&obj->class->object_cast_cache[i - 1], 889 qatomic_read(&obj->class->object_cast_cache[i])); 890 } 891 qatomic_set(&obj->class->object_cast_cache[i - 1], typename); 892 } 893 894 out: 895 #endif 896 return obj; 897 } 898 899 ObjectClass *object_class_dynamic_cast(ObjectClass *class, 900 const char *typename) 901 { 902 ObjectClass *ret = NULL; 903 TypeImpl *target_type; 904 TypeImpl *type; 905 906 if (!class) { 907 return NULL; 908 } 909 910 /* A simple fast path that can trigger a lot for leaf classes. */ 911 type = class->type; 912 if (type->name == typename) { 913 return class; 914 } 915 916 target_type = type_get_by_name(typename); 917 if (!target_type) { 918 /* target class type unknown, so fail the cast */ 919 return NULL; 920 } 921 922 if (type->class->interfaces && 923 type_is_ancestor(target_type, type_interface)) { 924 int found = 0; 925 GSList *i; 926 927 for (i = class->interfaces; i; i = i->next) { 928 ObjectClass *target_class = i->data; 929 930 if (type_is_ancestor(target_class->type, target_type)) { 931 ret = target_class; 932 found++; 933 } 934 } 935 936 /* The match was ambiguous, don't allow a cast */ 937 if (found > 1) { 938 ret = NULL; 939 } 940 } else if (type_is_ancestor(type, target_type)) { 941 ret = class; 942 } 943 944 return ret; 945 } 946 947 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, 948 const char *typename, 949 const char *file, int line, 950 const char *func) 951 { 952 ObjectClass *ret; 953 954 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)", 955 typename, file, line, func); 956 957 #ifdef CONFIG_QOM_CAST_DEBUG 958 int i; 959 960 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { 961 if (qatomic_read(&class->class_cast_cache[i]) == typename) { 962 ret = class; 963 goto out; 964 } 965 } 966 #else 967 if (!class || !class->interfaces) { 968 return class; 969 } 970 #endif 971 972 ret = object_class_dynamic_cast(class, typename); 973 if (!ret && class) { 974 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 975 file, line, func, class, typename); 976 abort(); 977 } 978 979 #ifdef CONFIG_QOM_CAST_DEBUG 980 if (class && ret == class) { 981 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 982 qatomic_set(&class->class_cast_cache[i - 1], 983 qatomic_read(&class->class_cast_cache[i])); 984 } 985 qatomic_set(&class->class_cast_cache[i - 1], typename); 986 } 987 out: 988 #endif 989 return ret; 990 } 991 992 const char *object_get_typename(const Object *obj) 993 { 994 return obj->class->type->name; 995 } 996 997 ObjectClass *object_get_class(Object *obj) 998 { 999 return obj->class; 1000 } 1001 1002 bool object_class_is_abstract(ObjectClass *klass) 1003 { 1004 return klass->type->abstract; 1005 } 1006 1007 const char *object_class_get_name(ObjectClass *klass) 1008 { 1009 return klass->type->name; 1010 } 1011 1012 ObjectClass *object_class_by_name(const char *typename) 1013 { 1014 TypeImpl *type = type_get_by_name(typename); 1015 1016 if (!type) { 1017 return NULL; 1018 } 1019 1020 type_initialize(type); 1021 1022 return type->class; 1023 } 1024 1025 ObjectClass *module_object_class_by_name(const char *typename) 1026 { 1027 ObjectClass *oc; 1028 1029 oc = object_class_by_name(typename); 1030 #ifdef CONFIG_MODULES 1031 if (!oc) { 1032 module_load_qom_one(typename); 1033 oc = object_class_by_name(typename); 1034 } 1035 #endif 1036 return oc; 1037 } 1038 1039 ObjectClass *object_class_get_parent(ObjectClass *class) 1040 { 1041 TypeImpl *type = type_get_parent(class->type); 1042 1043 if (!type) { 1044 return NULL; 1045 } 1046 1047 type_initialize(type); 1048 1049 return type->class; 1050 } 1051 1052 typedef struct OCFData 1053 { 1054 void (*fn)(ObjectClass *klass, void *opaque); 1055 const char *implements_type; 1056 bool include_abstract; 1057 void *opaque; 1058 } OCFData; 1059 1060 static void object_class_foreach_tramp(gpointer key, gpointer value, 1061 gpointer opaque) 1062 { 1063 OCFData *data = opaque; 1064 TypeImpl *type = value; 1065 ObjectClass *k; 1066 1067 type_initialize(type); 1068 k = type->class; 1069 1070 if (!data->include_abstract && type->abstract) { 1071 return; 1072 } 1073 1074 if (data->implements_type && 1075 !object_class_dynamic_cast(k, data->implements_type)) { 1076 return; 1077 } 1078 1079 data->fn(k, data->opaque); 1080 } 1081 1082 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), 1083 const char *implements_type, bool include_abstract, 1084 void *opaque) 1085 { 1086 OCFData data = { fn, implements_type, include_abstract, opaque }; 1087 1088 enumerating_types = true; 1089 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); 1090 enumerating_types = false; 1091 } 1092 1093 static int do_object_child_foreach(Object *obj, 1094 int (*fn)(Object *child, void *opaque), 1095 void *opaque, bool recurse) 1096 { 1097 GHashTableIter iter; 1098 ObjectProperty *prop; 1099 int ret = 0; 1100 1101 g_hash_table_iter_init(&iter, obj->properties); 1102 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1103 if (object_property_is_child(prop)) { 1104 Object *child = prop->opaque; 1105 1106 ret = fn(child, opaque); 1107 if (ret != 0) { 1108 break; 1109 } 1110 if (recurse) { 1111 ret = do_object_child_foreach(child, fn, opaque, true); 1112 if (ret != 0) { 1113 break; 1114 } 1115 } 1116 } 1117 } 1118 return ret; 1119 } 1120 1121 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), 1122 void *opaque) 1123 { 1124 return do_object_child_foreach(obj, fn, opaque, false); 1125 } 1126 1127 int object_child_foreach_recursive(Object *obj, 1128 int (*fn)(Object *child, void *opaque), 1129 void *opaque) 1130 { 1131 return do_object_child_foreach(obj, fn, opaque, true); 1132 } 1133 1134 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) 1135 { 1136 GSList **list = opaque; 1137 1138 *list = g_slist_prepend(*list, klass); 1139 } 1140 1141 GSList *object_class_get_list(const char *implements_type, 1142 bool include_abstract) 1143 { 1144 GSList *list = NULL; 1145 1146 object_class_foreach(object_class_get_list_tramp, 1147 implements_type, include_abstract, &list); 1148 return list; 1149 } 1150 1151 static gint object_class_cmp(gconstpointer a, gconstpointer b) 1152 { 1153 return strcasecmp(object_class_get_name((ObjectClass *)a), 1154 object_class_get_name((ObjectClass *)b)); 1155 } 1156 1157 GSList *object_class_get_list_sorted(const char *implements_type, 1158 bool include_abstract) 1159 { 1160 return g_slist_sort(object_class_get_list(implements_type, include_abstract), 1161 object_class_cmp); 1162 } 1163 1164 Object *object_ref(void *objptr) 1165 { 1166 Object *obj = OBJECT(objptr); 1167 if (!obj) { 1168 return NULL; 1169 } 1170 qatomic_inc(&obj->ref); 1171 return obj; 1172 } 1173 1174 void object_unref(void *objptr) 1175 { 1176 Object *obj = OBJECT(objptr); 1177 if (!obj) { 1178 return; 1179 } 1180 g_assert(obj->ref > 0); 1181 1182 /* parent always holds a reference to its children */ 1183 if (qatomic_fetch_dec(&obj->ref) == 1) { 1184 object_finalize(obj); 1185 } 1186 } 1187 1188 ObjectProperty * 1189 object_property_try_add(Object *obj, const char *name, const char *type, 1190 ObjectPropertyAccessor *get, 1191 ObjectPropertyAccessor *set, 1192 ObjectPropertyRelease *release, 1193 void *opaque, Error **errp) 1194 { 1195 ObjectProperty *prop; 1196 size_t name_len = strlen(name); 1197 1198 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1199 int i; 1200 ObjectProperty *ret = NULL; 1201 char *name_no_array = g_strdup(name); 1202 1203 name_no_array[name_len - 3] = '\0'; 1204 for (i = 0; i < INT16_MAX; ++i) { 1205 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1206 1207 ret = object_property_try_add(obj, full_name, type, get, set, 1208 release, opaque, NULL); 1209 g_free(full_name); 1210 if (ret) { 1211 break; 1212 } 1213 } 1214 g_free(name_no_array); 1215 assert(ret); 1216 return ret; 1217 } 1218 1219 if (object_property_find(obj, name) != NULL) { 1220 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1221 name, object_get_typename(obj)); 1222 return NULL; 1223 } 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(obj->properties, prop->name, prop); 1236 return prop; 1237 } 1238 1239 ObjectProperty * 1240 object_property_add(Object *obj, const char *name, const char *type, 1241 ObjectPropertyAccessor *get, 1242 ObjectPropertyAccessor *set, 1243 ObjectPropertyRelease *release, 1244 void *opaque) 1245 { 1246 return object_property_try_add(obj, name, type, get, set, release, 1247 opaque, &error_abort); 1248 } 1249 1250 ObjectProperty * 1251 object_class_property_add(ObjectClass *klass, 1252 const char *name, 1253 const char *type, 1254 ObjectPropertyAccessor *get, 1255 ObjectPropertyAccessor *set, 1256 ObjectPropertyRelease *release, 1257 void *opaque) 1258 { 1259 ObjectProperty *prop; 1260 1261 assert(!object_class_property_find(klass, name)); 1262 1263 prop = g_malloc0(sizeof(*prop)); 1264 1265 prop->name = g_strdup(name); 1266 prop->type = g_strdup(type); 1267 1268 prop->get = get; 1269 prop->set = set; 1270 prop->release = release; 1271 prop->opaque = opaque; 1272 1273 g_hash_table_insert(klass->properties, prop->name, prop); 1274 1275 return prop; 1276 } 1277 1278 ObjectProperty *object_property_find(Object *obj, const char *name) 1279 { 1280 ObjectProperty *prop; 1281 ObjectClass *klass = object_get_class(obj); 1282 1283 prop = object_class_property_find(klass, name); 1284 if (prop) { 1285 return prop; 1286 } 1287 1288 return g_hash_table_lookup(obj->properties, name); 1289 } 1290 1291 ObjectProperty *object_property_find_err(Object *obj, const char *name, 1292 Error **errp) 1293 { 1294 ObjectProperty *prop = object_property_find(obj, name); 1295 if (!prop) { 1296 error_setg(errp, "Property '%s.%s' not found", 1297 object_get_typename(obj), name); 1298 } 1299 return prop; 1300 } 1301 1302 void object_property_iter_init(ObjectPropertyIterator *iter, 1303 Object *obj) 1304 { 1305 g_hash_table_iter_init(&iter->iter, obj->properties); 1306 iter->nextclass = object_get_class(obj); 1307 } 1308 1309 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1310 { 1311 gpointer key, val; 1312 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1313 if (!iter->nextclass) { 1314 return NULL; 1315 } 1316 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1317 iter->nextclass = object_class_get_parent(iter->nextclass); 1318 } 1319 return val; 1320 } 1321 1322 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1323 ObjectClass *klass) 1324 { 1325 g_hash_table_iter_init(&iter->iter, klass->properties); 1326 iter->nextclass = object_class_get_parent(klass); 1327 } 1328 1329 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name) 1330 { 1331 ObjectClass *parent_klass; 1332 1333 parent_klass = object_class_get_parent(klass); 1334 if (parent_klass) { 1335 ObjectProperty *prop = 1336 object_class_property_find(parent_klass, name); 1337 if (prop) { 1338 return prop; 1339 } 1340 } 1341 1342 return g_hash_table_lookup(klass->properties, name); 1343 } 1344 1345 ObjectProperty *object_class_property_find_err(ObjectClass *klass, 1346 const char *name, 1347 Error **errp) 1348 { 1349 ObjectProperty *prop = object_class_property_find(klass, name); 1350 if (!prop) { 1351 error_setg(errp, "Property '.%s' not found", name); 1352 } 1353 return prop; 1354 } 1355 1356 1357 void object_property_del(Object *obj, const char *name) 1358 { 1359 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1360 1361 if (prop->release) { 1362 prop->release(obj, name, prop->opaque); 1363 } 1364 g_hash_table_remove(obj->properties, name); 1365 } 1366 1367 bool object_property_get(Object *obj, const char *name, Visitor *v, 1368 Error **errp) 1369 { 1370 Error *err = NULL; 1371 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1372 1373 if (prop == NULL) { 1374 return false; 1375 } 1376 1377 if (!prop->get) { 1378 error_setg(errp, QERR_PERMISSION_DENIED); 1379 return false; 1380 } 1381 prop->get(obj, v, name, prop->opaque, &err); 1382 error_propagate(errp, err); 1383 return !err; 1384 } 1385 1386 bool object_property_set(Object *obj, const char *name, Visitor *v, 1387 Error **errp) 1388 { 1389 Error *err = NULL; 1390 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1391 1392 if (prop == NULL) { 1393 return false; 1394 } 1395 1396 if (!prop->set) { 1397 error_setg(errp, QERR_PERMISSION_DENIED); 1398 return false; 1399 } 1400 prop->set(obj, v, name, prop->opaque, &err); 1401 error_propagate(errp, err); 1402 return !err; 1403 } 1404 1405 bool object_property_set_str(Object *obj, const char *name, 1406 const char *value, Error **errp) 1407 { 1408 QString *qstr = qstring_from_str(value); 1409 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1410 1411 qobject_unref(qstr); 1412 return ok; 1413 } 1414 1415 char *object_property_get_str(Object *obj, const char *name, 1416 Error **errp) 1417 { 1418 QObject *ret = object_property_get_qobject(obj, name, errp); 1419 QString *qstring; 1420 char *retval; 1421 1422 if (!ret) { 1423 return NULL; 1424 } 1425 qstring = qobject_to(QString, ret); 1426 if (!qstring) { 1427 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1428 retval = NULL; 1429 } else { 1430 retval = g_strdup(qstring_get_str(qstring)); 1431 } 1432 1433 qobject_unref(ret); 1434 return retval; 1435 } 1436 1437 bool object_property_set_link(Object *obj, const char *name, 1438 Object *value, Error **errp) 1439 { 1440 g_autofree char *path = NULL; 1441 1442 if (value) { 1443 path = object_get_canonical_path(value); 1444 } 1445 return object_property_set_str(obj, name, path ?: "", errp); 1446 } 1447 1448 Object *object_property_get_link(Object *obj, const char *name, 1449 Error **errp) 1450 { 1451 char *str = object_property_get_str(obj, name, errp); 1452 Object *target = NULL; 1453 1454 if (str && *str) { 1455 target = object_resolve_path(str, NULL); 1456 if (!target) { 1457 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1458 "Device '%s' not found", str); 1459 } 1460 } 1461 1462 g_free(str); 1463 return target; 1464 } 1465 1466 bool object_property_set_bool(Object *obj, const char *name, 1467 bool value, Error **errp) 1468 { 1469 QBool *qbool = qbool_from_bool(value); 1470 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1471 1472 qobject_unref(qbool); 1473 return ok; 1474 } 1475 1476 bool object_property_get_bool(Object *obj, const char *name, 1477 Error **errp) 1478 { 1479 QObject *ret = object_property_get_qobject(obj, name, errp); 1480 QBool *qbool; 1481 bool retval; 1482 1483 if (!ret) { 1484 return false; 1485 } 1486 qbool = qobject_to(QBool, ret); 1487 if (!qbool) { 1488 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1489 retval = false; 1490 } else { 1491 retval = qbool_get_bool(qbool); 1492 } 1493 1494 qobject_unref(ret); 1495 return retval; 1496 } 1497 1498 bool object_property_set_int(Object *obj, const char *name, 1499 int64_t value, Error **errp) 1500 { 1501 QNum *qnum = qnum_from_int(value); 1502 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1503 1504 qobject_unref(qnum); 1505 return ok; 1506 } 1507 1508 int64_t object_property_get_int(Object *obj, const char *name, 1509 Error **errp) 1510 { 1511 QObject *ret = object_property_get_qobject(obj, name, errp); 1512 QNum *qnum; 1513 int64_t retval; 1514 1515 if (!ret) { 1516 return -1; 1517 } 1518 1519 qnum = qobject_to(QNum, ret); 1520 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1521 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1522 retval = -1; 1523 } 1524 1525 qobject_unref(ret); 1526 return retval; 1527 } 1528 1529 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1530 { 1531 Visitor *v = qobject_input_visitor_new(prop->defval); 1532 1533 assert(prop->set != NULL); 1534 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1535 1536 visit_free(v); 1537 } 1538 1539 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1540 { 1541 assert(!prop->defval); 1542 assert(!prop->init); 1543 1544 prop->defval = defval; 1545 prop->init = object_property_init_defval; 1546 } 1547 1548 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1549 { 1550 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1551 } 1552 1553 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1554 { 1555 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1556 } 1557 1558 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1559 { 1560 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1561 } 1562 1563 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1564 { 1565 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1566 } 1567 1568 bool object_property_set_uint(Object *obj, const char *name, 1569 uint64_t value, Error **errp) 1570 { 1571 QNum *qnum = qnum_from_uint(value); 1572 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1573 1574 qobject_unref(qnum); 1575 return ok; 1576 } 1577 1578 uint64_t object_property_get_uint(Object *obj, const char *name, 1579 Error **errp) 1580 { 1581 QObject *ret = object_property_get_qobject(obj, name, errp); 1582 QNum *qnum; 1583 uint64_t retval; 1584 1585 if (!ret) { 1586 return 0; 1587 } 1588 qnum = qobject_to(QNum, ret); 1589 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1590 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1591 retval = 0; 1592 } 1593 1594 qobject_unref(ret); 1595 return retval; 1596 } 1597 1598 typedef struct EnumProperty { 1599 const QEnumLookup *lookup; 1600 int (*get)(Object *, Error **); 1601 void (*set)(Object *, int, Error **); 1602 } EnumProperty; 1603 1604 int object_property_get_enum(Object *obj, const char *name, 1605 const char *typename, Error **errp) 1606 { 1607 char *str; 1608 int ret; 1609 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1610 EnumProperty *enumprop; 1611 1612 if (prop == NULL) { 1613 return -1; 1614 } 1615 1616 if (!g_str_equal(prop->type, typename)) { 1617 error_setg(errp, "Property %s on %s is not '%s' enum type", 1618 name, object_class_get_name( 1619 object_get_class(obj)), typename); 1620 return -1; 1621 } 1622 1623 enumprop = prop->opaque; 1624 1625 str = object_property_get_str(obj, name, errp); 1626 if (!str) { 1627 return -1; 1628 } 1629 1630 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1631 g_free(str); 1632 1633 return ret; 1634 } 1635 1636 bool object_property_parse(Object *obj, const char *name, 1637 const char *string, Error **errp) 1638 { 1639 Visitor *v = string_input_visitor_new(string); 1640 bool ok = object_property_set(obj, name, v, errp); 1641 1642 visit_free(v); 1643 return ok; 1644 } 1645 1646 char *object_property_print(Object *obj, const char *name, bool human, 1647 Error **errp) 1648 { 1649 Visitor *v; 1650 char *string = NULL; 1651 1652 v = string_output_visitor_new(human, &string); 1653 if (!object_property_get(obj, name, v, errp)) { 1654 goto out; 1655 } 1656 1657 visit_complete(v, &string); 1658 1659 out: 1660 visit_free(v); 1661 return string; 1662 } 1663 1664 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1665 { 1666 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1667 if (prop == NULL) { 1668 return NULL; 1669 } 1670 1671 return prop->type; 1672 } 1673 1674 Object *object_get_root(void) 1675 { 1676 static Object *root; 1677 1678 if (!root) { 1679 root = object_new("container"); 1680 } 1681 1682 return root; 1683 } 1684 1685 Object *object_get_objects_root(void) 1686 { 1687 return container_get(object_get_root(), "/objects"); 1688 } 1689 1690 Object *object_get_internal_root(void) 1691 { 1692 static Object *internal_root; 1693 1694 if (!internal_root) { 1695 internal_root = object_new("container"); 1696 } 1697 1698 return internal_root; 1699 } 1700 1701 static void object_get_child_property(Object *obj, Visitor *v, 1702 const char *name, void *opaque, 1703 Error **errp) 1704 { 1705 Object *child = opaque; 1706 char *path; 1707 1708 path = object_get_canonical_path(child); 1709 visit_type_str(v, name, &path, errp); 1710 g_free(path); 1711 } 1712 1713 static Object *object_resolve_child_property(Object *parent, void *opaque, 1714 const char *part) 1715 { 1716 return opaque; 1717 } 1718 1719 static void object_finalize_child_property(Object *obj, const char *name, 1720 void *opaque) 1721 { 1722 Object *child = opaque; 1723 1724 if (child->class->unparent) { 1725 (child->class->unparent)(child); 1726 } 1727 child->parent = NULL; 1728 object_unref(child); 1729 } 1730 1731 ObjectProperty * 1732 object_property_try_add_child(Object *obj, const char *name, 1733 Object *child, Error **errp) 1734 { 1735 g_autofree char *type = NULL; 1736 ObjectProperty *op; 1737 1738 assert(!child->parent); 1739 1740 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1741 1742 op = object_property_try_add(obj, name, type, object_get_child_property, 1743 NULL, object_finalize_child_property, 1744 child, errp); 1745 if (!op) { 1746 return NULL; 1747 } 1748 op->resolve = object_resolve_child_property; 1749 object_ref(child); 1750 child->parent = obj; 1751 return op; 1752 } 1753 1754 ObjectProperty * 1755 object_property_add_child(Object *obj, const char *name, 1756 Object *child) 1757 { 1758 return object_property_try_add_child(obj, name, child, &error_abort); 1759 } 1760 1761 void object_property_allow_set_link(const Object *obj, const char *name, 1762 Object *val, Error **errp) 1763 { 1764 /* Allow the link to be set, always */ 1765 } 1766 1767 typedef struct { 1768 union { 1769 Object **targetp; 1770 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1771 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1772 }; 1773 void (*check)(const Object *, const char *, Object *, Error **); 1774 ObjectPropertyLinkFlags flags; 1775 } LinkProperty; 1776 1777 static Object ** 1778 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1779 { 1780 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1781 return &lprop->target; 1782 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1783 return (void *)obj + lprop->offset; 1784 } else { 1785 return lprop->targetp; 1786 } 1787 } 1788 1789 static void object_get_link_property(Object *obj, Visitor *v, 1790 const char *name, void *opaque, 1791 Error **errp) 1792 { 1793 LinkProperty *lprop = opaque; 1794 Object **targetp = object_link_get_targetp(obj, lprop); 1795 char *path; 1796 1797 if (*targetp) { 1798 path = object_get_canonical_path(*targetp); 1799 visit_type_str(v, name, &path, errp); 1800 g_free(path); 1801 } else { 1802 path = (char *)""; 1803 visit_type_str(v, name, &path, errp); 1804 } 1805 } 1806 1807 /* 1808 * object_resolve_link: 1809 * 1810 * Lookup an object and ensure its type matches the link property type. This 1811 * is similar to object_resolve_path() except type verification against the 1812 * link property is performed. 1813 * 1814 * Returns: The matched object or NULL on path lookup failures. 1815 */ 1816 static Object *object_resolve_link(Object *obj, const char *name, 1817 const char *path, Error **errp) 1818 { 1819 const char *type; 1820 char *target_type; 1821 bool ambiguous = false; 1822 Object *target; 1823 1824 /* Go from link<FOO> to FOO. */ 1825 type = object_property_get_type(obj, name, NULL); 1826 target_type = g_strndup(&type[5], strlen(type) - 6); 1827 target = object_resolve_path_type(path, target_type, &ambiguous); 1828 1829 if (ambiguous) { 1830 error_setg(errp, "Path '%s' does not uniquely identify an object", 1831 path); 1832 } else if (!target) { 1833 target = object_resolve_path(path, &ambiguous); 1834 if (target || ambiguous) { 1835 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1836 } else { 1837 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1838 "Device '%s' not found", path); 1839 } 1840 target = NULL; 1841 } 1842 g_free(target_type); 1843 1844 return target; 1845 } 1846 1847 static void object_set_link_property(Object *obj, Visitor *v, 1848 const char *name, void *opaque, 1849 Error **errp) 1850 { 1851 Error *local_err = NULL; 1852 LinkProperty *prop = opaque; 1853 Object **targetp = object_link_get_targetp(obj, prop); 1854 Object *old_target = *targetp; 1855 Object *new_target; 1856 char *path = NULL; 1857 1858 if (!visit_type_str(v, name, &path, errp)) { 1859 return; 1860 } 1861 1862 if (*path) { 1863 new_target = object_resolve_link(obj, name, path, errp); 1864 if (!new_target) { 1865 g_free(path); 1866 return; 1867 } 1868 } else { 1869 new_target = NULL; 1870 } 1871 1872 g_free(path); 1873 1874 prop->check(obj, name, new_target, &local_err); 1875 if (local_err) { 1876 error_propagate(errp, local_err); 1877 return; 1878 } 1879 1880 *targetp = new_target; 1881 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1882 object_ref(new_target); 1883 object_unref(old_target); 1884 } 1885 } 1886 1887 static Object *object_resolve_link_property(Object *parent, void *opaque, 1888 const char *part) 1889 { 1890 LinkProperty *lprop = opaque; 1891 1892 return *object_link_get_targetp(parent, lprop); 1893 } 1894 1895 static void object_release_link_property(Object *obj, const char *name, 1896 void *opaque) 1897 { 1898 LinkProperty *prop = opaque; 1899 Object **targetp = object_link_get_targetp(obj, prop); 1900 1901 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1902 object_unref(*targetp); 1903 } 1904 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1905 g_free(prop); 1906 } 1907 } 1908 1909 static ObjectProperty * 1910 object_add_link_prop(Object *obj, const char *name, 1911 const char *type, void *ptr, 1912 void (*check)(const Object *, const char *, 1913 Object *, Error **), 1914 ObjectPropertyLinkFlags flags) 1915 { 1916 LinkProperty *prop = g_malloc(sizeof(*prop)); 1917 g_autofree char *full_type = NULL; 1918 ObjectProperty *op; 1919 1920 if (flags & OBJ_PROP_LINK_DIRECT) { 1921 prop->target = ptr; 1922 } else { 1923 prop->targetp = ptr; 1924 } 1925 prop->check = check; 1926 prop->flags = flags; 1927 1928 full_type = g_strdup_printf("link<%s>", type); 1929 1930 op = object_property_add(obj, name, full_type, 1931 object_get_link_property, 1932 check ? object_set_link_property : NULL, 1933 object_release_link_property, 1934 prop); 1935 op->resolve = object_resolve_link_property; 1936 return op; 1937 } 1938 1939 ObjectProperty * 1940 object_property_add_link(Object *obj, const char *name, 1941 const char *type, Object **targetp, 1942 void (*check)(const Object *, const char *, 1943 Object *, Error **), 1944 ObjectPropertyLinkFlags flags) 1945 { 1946 return object_add_link_prop(obj, name, type, targetp, check, flags); 1947 } 1948 1949 ObjectProperty * 1950 object_class_property_add_link(ObjectClass *oc, 1951 const char *name, 1952 const char *type, ptrdiff_t offset, 1953 void (*check)(const Object *obj, const char *name, 1954 Object *val, Error **errp), 1955 ObjectPropertyLinkFlags flags) 1956 { 1957 LinkProperty *prop = g_new0(LinkProperty, 1); 1958 char *full_type; 1959 ObjectProperty *op; 1960 1961 prop->offset = offset; 1962 prop->check = check; 1963 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1964 1965 full_type = g_strdup_printf("link<%s>", type); 1966 1967 op = object_class_property_add(oc, name, full_type, 1968 object_get_link_property, 1969 check ? object_set_link_property : NULL, 1970 object_release_link_property, 1971 prop); 1972 1973 op->resolve = object_resolve_link_property; 1974 1975 g_free(full_type); 1976 return op; 1977 } 1978 1979 ObjectProperty * 1980 object_property_add_const_link(Object *obj, const char *name, 1981 Object *target) 1982 { 1983 return object_add_link_prop(obj, name, 1984 object_get_typename(target), target, 1985 NULL, OBJ_PROP_LINK_DIRECT); 1986 } 1987 1988 const char *object_get_canonical_path_component(const Object *obj) 1989 { 1990 ObjectProperty *prop = NULL; 1991 GHashTableIter iter; 1992 1993 if (obj->parent == NULL) { 1994 return NULL; 1995 } 1996 1997 g_hash_table_iter_init(&iter, obj->parent->properties); 1998 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1999 if (!object_property_is_child(prop)) { 2000 continue; 2001 } 2002 2003 if (prop->opaque == obj) { 2004 return prop->name; 2005 } 2006 } 2007 2008 /* obj had a parent but was not a child, should never happen */ 2009 g_assert_not_reached(); 2010 return NULL; 2011 } 2012 2013 char *object_get_canonical_path(const Object *obj) 2014 { 2015 Object *root = object_get_root(); 2016 char *newpath, *path = NULL; 2017 2018 if (obj == root) { 2019 return g_strdup("/"); 2020 } 2021 2022 do { 2023 const char *component = object_get_canonical_path_component(obj); 2024 2025 if (!component) { 2026 /* A canonical path must be complete, so discard what was 2027 * collected so far. 2028 */ 2029 g_free(path); 2030 return NULL; 2031 } 2032 2033 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 2034 g_free(path); 2035 path = newpath; 2036 obj = obj->parent; 2037 } while (obj != root); 2038 2039 return path; 2040 } 2041 2042 Object *object_resolve_path_component(Object *parent, const char *part) 2043 { 2044 ObjectProperty *prop = object_property_find(parent, part); 2045 if (prop == NULL) { 2046 return NULL; 2047 } 2048 2049 if (prop->resolve) { 2050 return prop->resolve(parent, prop->opaque, part); 2051 } else { 2052 return NULL; 2053 } 2054 } 2055 2056 static Object *object_resolve_abs_path(Object *parent, 2057 char **parts, 2058 const char *typename) 2059 { 2060 Object *child; 2061 2062 if (*parts == NULL) { 2063 return object_dynamic_cast(parent, typename); 2064 } 2065 2066 if (strcmp(*parts, "") == 0) { 2067 return object_resolve_abs_path(parent, parts + 1, typename); 2068 } 2069 2070 child = object_resolve_path_component(parent, *parts); 2071 if (!child) { 2072 return NULL; 2073 } 2074 2075 return object_resolve_abs_path(child, parts + 1, typename); 2076 } 2077 2078 static Object *object_resolve_partial_path(Object *parent, 2079 char **parts, 2080 const char *typename, 2081 bool *ambiguous) 2082 { 2083 Object *obj; 2084 GHashTableIter iter; 2085 ObjectProperty *prop; 2086 2087 obj = object_resolve_abs_path(parent, parts, typename); 2088 2089 g_hash_table_iter_init(&iter, parent->properties); 2090 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2091 Object *found; 2092 2093 if (!object_property_is_child(prop)) { 2094 continue; 2095 } 2096 2097 found = object_resolve_partial_path(prop->opaque, parts, 2098 typename, ambiguous); 2099 if (found) { 2100 if (obj) { 2101 *ambiguous = true; 2102 return NULL; 2103 } 2104 obj = found; 2105 } 2106 2107 if (*ambiguous) { 2108 return NULL; 2109 } 2110 } 2111 2112 return obj; 2113 } 2114 2115 Object *object_resolve_path_type(const char *path, const char *typename, 2116 bool *ambiguousp) 2117 { 2118 Object *obj; 2119 char **parts; 2120 2121 parts = g_strsplit(path, "/", 0); 2122 assert(parts); 2123 2124 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2125 bool ambiguous = false; 2126 obj = object_resolve_partial_path(object_get_root(), parts, 2127 typename, &ambiguous); 2128 if (ambiguousp) { 2129 *ambiguousp = ambiguous; 2130 } 2131 } else { 2132 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2133 } 2134 2135 g_strfreev(parts); 2136 2137 return obj; 2138 } 2139 2140 Object *object_resolve_path(const char *path, bool *ambiguous) 2141 { 2142 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2143 } 2144 2145 typedef struct StringProperty 2146 { 2147 char *(*get)(Object *, Error **); 2148 void (*set)(Object *, const char *, Error **); 2149 } StringProperty; 2150 2151 static void property_get_str(Object *obj, Visitor *v, const char *name, 2152 void *opaque, Error **errp) 2153 { 2154 StringProperty *prop = opaque; 2155 char *value; 2156 Error *err = NULL; 2157 2158 value = prop->get(obj, &err); 2159 if (err) { 2160 error_propagate(errp, err); 2161 return; 2162 } 2163 2164 visit_type_str(v, name, &value, errp); 2165 g_free(value); 2166 } 2167 2168 static void property_set_str(Object *obj, Visitor *v, const char *name, 2169 void *opaque, Error **errp) 2170 { 2171 StringProperty *prop = opaque; 2172 char *value; 2173 2174 if (!visit_type_str(v, name, &value, errp)) { 2175 return; 2176 } 2177 2178 prop->set(obj, value, errp); 2179 g_free(value); 2180 } 2181 2182 static void property_release_data(Object *obj, const char *name, 2183 void *opaque) 2184 { 2185 g_free(opaque); 2186 } 2187 2188 ObjectProperty * 2189 object_property_add_str(Object *obj, const char *name, 2190 char *(*get)(Object *, Error **), 2191 void (*set)(Object *, const char *, Error **)) 2192 { 2193 StringProperty *prop = g_malloc0(sizeof(*prop)); 2194 2195 prop->get = get; 2196 prop->set = set; 2197 2198 return object_property_add(obj, name, "string", 2199 get ? property_get_str : NULL, 2200 set ? property_set_str : NULL, 2201 property_release_data, 2202 prop); 2203 } 2204 2205 ObjectProperty * 2206 object_class_property_add_str(ObjectClass *klass, const char *name, 2207 char *(*get)(Object *, Error **), 2208 void (*set)(Object *, const char *, 2209 Error **)) 2210 { 2211 StringProperty *prop = g_malloc0(sizeof(*prop)); 2212 2213 prop->get = get; 2214 prop->set = set; 2215 2216 return object_class_property_add(klass, name, "string", 2217 get ? property_get_str : NULL, 2218 set ? property_set_str : NULL, 2219 NULL, 2220 prop); 2221 } 2222 2223 typedef struct BoolProperty 2224 { 2225 bool (*get)(Object *, Error **); 2226 void (*set)(Object *, bool, Error **); 2227 } BoolProperty; 2228 2229 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2230 void *opaque, Error **errp) 2231 { 2232 BoolProperty *prop = opaque; 2233 bool value; 2234 Error *err = NULL; 2235 2236 value = prop->get(obj, &err); 2237 if (err) { 2238 error_propagate(errp, err); 2239 return; 2240 } 2241 2242 visit_type_bool(v, name, &value, errp); 2243 } 2244 2245 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2246 void *opaque, Error **errp) 2247 { 2248 BoolProperty *prop = opaque; 2249 bool value; 2250 2251 if (!visit_type_bool(v, name, &value, errp)) { 2252 return; 2253 } 2254 2255 prop->set(obj, value, errp); 2256 } 2257 2258 ObjectProperty * 2259 object_property_add_bool(Object *obj, const char *name, 2260 bool (*get)(Object *, Error **), 2261 void (*set)(Object *, bool, Error **)) 2262 { 2263 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2264 2265 prop->get = get; 2266 prop->set = set; 2267 2268 return object_property_add(obj, name, "bool", 2269 get ? property_get_bool : NULL, 2270 set ? property_set_bool : NULL, 2271 property_release_data, 2272 prop); 2273 } 2274 2275 ObjectProperty * 2276 object_class_property_add_bool(ObjectClass *klass, const char *name, 2277 bool (*get)(Object *, Error **), 2278 void (*set)(Object *, bool, Error **)) 2279 { 2280 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2281 2282 prop->get = get; 2283 prop->set = set; 2284 2285 return object_class_property_add(klass, name, "bool", 2286 get ? property_get_bool : NULL, 2287 set ? property_set_bool : NULL, 2288 NULL, 2289 prop); 2290 } 2291 2292 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2293 void *opaque, Error **errp) 2294 { 2295 EnumProperty *prop = opaque; 2296 int value; 2297 Error *err = NULL; 2298 2299 value = prop->get(obj, &err); 2300 if (err) { 2301 error_propagate(errp, err); 2302 return; 2303 } 2304 2305 visit_type_enum(v, name, &value, prop->lookup, errp); 2306 } 2307 2308 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2309 void *opaque, Error **errp) 2310 { 2311 EnumProperty *prop = opaque; 2312 int value; 2313 2314 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2315 return; 2316 } 2317 prop->set(obj, value, errp); 2318 } 2319 2320 ObjectProperty * 2321 object_property_add_enum(Object *obj, const char *name, 2322 const char *typename, 2323 const QEnumLookup *lookup, 2324 int (*get)(Object *, Error **), 2325 void (*set)(Object *, int, Error **)) 2326 { 2327 EnumProperty *prop = g_malloc(sizeof(*prop)); 2328 2329 prop->lookup = lookup; 2330 prop->get = get; 2331 prop->set = set; 2332 2333 return object_property_add(obj, name, typename, 2334 get ? property_get_enum : NULL, 2335 set ? property_set_enum : NULL, 2336 property_release_data, 2337 prop); 2338 } 2339 2340 ObjectProperty * 2341 object_class_property_add_enum(ObjectClass *klass, const char *name, 2342 const char *typename, 2343 const QEnumLookup *lookup, 2344 int (*get)(Object *, Error **), 2345 void (*set)(Object *, int, Error **)) 2346 { 2347 EnumProperty *prop = g_malloc(sizeof(*prop)); 2348 2349 prop->lookup = lookup; 2350 prop->get = get; 2351 prop->set = set; 2352 2353 return object_class_property_add(klass, name, typename, 2354 get ? property_get_enum : NULL, 2355 set ? property_set_enum : NULL, 2356 NULL, 2357 prop); 2358 } 2359 2360 typedef struct TMProperty { 2361 void (*get)(Object *, struct tm *, Error **); 2362 } TMProperty; 2363 2364 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2365 void *opaque, Error **errp) 2366 { 2367 TMProperty *prop = opaque; 2368 Error *err = NULL; 2369 struct tm value; 2370 2371 prop->get(obj, &value, &err); 2372 if (err) { 2373 error_propagate(errp, err); 2374 return; 2375 } 2376 2377 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2378 return; 2379 } 2380 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2381 goto out_end; 2382 } 2383 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2384 goto out_end; 2385 } 2386 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2387 goto out_end; 2388 } 2389 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2390 goto out_end; 2391 } 2392 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2393 goto out_end; 2394 } 2395 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2396 goto out_end; 2397 } 2398 visit_check_struct(v, errp); 2399 out_end: 2400 visit_end_struct(v, NULL); 2401 } 2402 2403 ObjectProperty * 2404 object_property_add_tm(Object *obj, const char *name, 2405 void (*get)(Object *, struct tm *, Error **)) 2406 { 2407 TMProperty *prop = g_malloc0(sizeof(*prop)); 2408 2409 prop->get = get; 2410 2411 return object_property_add(obj, name, "struct tm", 2412 get ? property_get_tm : NULL, NULL, 2413 property_release_data, 2414 prop); 2415 } 2416 2417 ObjectProperty * 2418 object_class_property_add_tm(ObjectClass *klass, const char *name, 2419 void (*get)(Object *, struct tm *, Error **)) 2420 { 2421 TMProperty *prop = g_malloc0(sizeof(*prop)); 2422 2423 prop->get = get; 2424 2425 return object_class_property_add(klass, name, "struct tm", 2426 get ? property_get_tm : NULL, 2427 NULL, NULL, prop); 2428 } 2429 2430 static char *object_get_type(Object *obj, Error **errp) 2431 { 2432 return g_strdup(object_get_typename(obj)); 2433 } 2434 2435 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2436 void *opaque, Error **errp) 2437 { 2438 uint8_t value = *(uint8_t *)opaque; 2439 visit_type_uint8(v, name, &value, errp); 2440 } 2441 2442 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2443 void *opaque, Error **errp) 2444 { 2445 uint8_t *field = opaque; 2446 uint8_t value; 2447 2448 if (!visit_type_uint8(v, name, &value, errp)) { 2449 return; 2450 } 2451 2452 *field = value; 2453 } 2454 2455 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2456 void *opaque, Error **errp) 2457 { 2458 uint16_t value = *(uint16_t *)opaque; 2459 visit_type_uint16(v, name, &value, errp); 2460 } 2461 2462 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2463 void *opaque, Error **errp) 2464 { 2465 uint16_t *field = opaque; 2466 uint16_t value; 2467 2468 if (!visit_type_uint16(v, name, &value, errp)) { 2469 return; 2470 } 2471 2472 *field = value; 2473 } 2474 2475 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2476 void *opaque, Error **errp) 2477 { 2478 uint32_t value = *(uint32_t *)opaque; 2479 visit_type_uint32(v, name, &value, errp); 2480 } 2481 2482 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2483 void *opaque, Error **errp) 2484 { 2485 uint32_t *field = opaque; 2486 uint32_t value; 2487 2488 if (!visit_type_uint32(v, name, &value, errp)) { 2489 return; 2490 } 2491 2492 *field = value; 2493 } 2494 2495 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2496 void *opaque, Error **errp) 2497 { 2498 uint64_t value = *(uint64_t *)opaque; 2499 visit_type_uint64(v, name, &value, errp); 2500 } 2501 2502 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2503 void *opaque, Error **errp) 2504 { 2505 uint64_t *field = opaque; 2506 uint64_t value; 2507 2508 if (!visit_type_uint64(v, name, &value, errp)) { 2509 return; 2510 } 2511 2512 *field = value; 2513 } 2514 2515 ObjectProperty * 2516 object_property_add_uint8_ptr(Object *obj, const char *name, 2517 const uint8_t *v, 2518 ObjectPropertyFlags flags) 2519 { 2520 ObjectPropertyAccessor *getter = NULL; 2521 ObjectPropertyAccessor *setter = NULL; 2522 2523 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2524 getter = property_get_uint8_ptr; 2525 } 2526 2527 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2528 setter = property_set_uint8_ptr; 2529 } 2530 2531 return object_property_add(obj, name, "uint8", 2532 getter, setter, NULL, (void *)v); 2533 } 2534 2535 ObjectProperty * 2536 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2537 const uint8_t *v, 2538 ObjectPropertyFlags flags) 2539 { 2540 ObjectPropertyAccessor *getter = NULL; 2541 ObjectPropertyAccessor *setter = NULL; 2542 2543 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2544 getter = property_get_uint8_ptr; 2545 } 2546 2547 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2548 setter = property_set_uint8_ptr; 2549 } 2550 2551 return object_class_property_add(klass, name, "uint8", 2552 getter, setter, NULL, (void *)v); 2553 } 2554 2555 ObjectProperty * 2556 object_property_add_uint16_ptr(Object *obj, const char *name, 2557 const uint16_t *v, 2558 ObjectPropertyFlags flags) 2559 { 2560 ObjectPropertyAccessor *getter = NULL; 2561 ObjectPropertyAccessor *setter = NULL; 2562 2563 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2564 getter = property_get_uint16_ptr; 2565 } 2566 2567 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2568 setter = property_set_uint16_ptr; 2569 } 2570 2571 return object_property_add(obj, name, "uint16", 2572 getter, setter, NULL, (void *)v); 2573 } 2574 2575 ObjectProperty * 2576 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2577 const uint16_t *v, 2578 ObjectPropertyFlags flags) 2579 { 2580 ObjectPropertyAccessor *getter = NULL; 2581 ObjectPropertyAccessor *setter = NULL; 2582 2583 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2584 getter = property_get_uint16_ptr; 2585 } 2586 2587 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2588 setter = property_set_uint16_ptr; 2589 } 2590 2591 return object_class_property_add(klass, name, "uint16", 2592 getter, setter, NULL, (void *)v); 2593 } 2594 2595 ObjectProperty * 2596 object_property_add_uint32_ptr(Object *obj, const char *name, 2597 const uint32_t *v, 2598 ObjectPropertyFlags flags) 2599 { 2600 ObjectPropertyAccessor *getter = NULL; 2601 ObjectPropertyAccessor *setter = NULL; 2602 2603 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2604 getter = property_get_uint32_ptr; 2605 } 2606 2607 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2608 setter = property_set_uint32_ptr; 2609 } 2610 2611 return object_property_add(obj, name, "uint32", 2612 getter, setter, NULL, (void *)v); 2613 } 2614 2615 ObjectProperty * 2616 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2617 const uint32_t *v, 2618 ObjectPropertyFlags flags) 2619 { 2620 ObjectPropertyAccessor *getter = NULL; 2621 ObjectPropertyAccessor *setter = NULL; 2622 2623 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2624 getter = property_get_uint32_ptr; 2625 } 2626 2627 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2628 setter = property_set_uint32_ptr; 2629 } 2630 2631 return object_class_property_add(klass, name, "uint32", 2632 getter, setter, NULL, (void *)v); 2633 } 2634 2635 ObjectProperty * 2636 object_property_add_uint64_ptr(Object *obj, const char *name, 2637 const uint64_t *v, 2638 ObjectPropertyFlags flags) 2639 { 2640 ObjectPropertyAccessor *getter = NULL; 2641 ObjectPropertyAccessor *setter = NULL; 2642 2643 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2644 getter = property_get_uint64_ptr; 2645 } 2646 2647 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2648 setter = property_set_uint64_ptr; 2649 } 2650 2651 return object_property_add(obj, name, "uint64", 2652 getter, setter, NULL, (void *)v); 2653 } 2654 2655 ObjectProperty * 2656 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2657 const uint64_t *v, 2658 ObjectPropertyFlags flags) 2659 { 2660 ObjectPropertyAccessor *getter = NULL; 2661 ObjectPropertyAccessor *setter = NULL; 2662 2663 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2664 getter = property_get_uint64_ptr; 2665 } 2666 2667 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2668 setter = property_set_uint64_ptr; 2669 } 2670 2671 return object_class_property_add(klass, name, "uint64", 2672 getter, setter, NULL, (void *)v); 2673 } 2674 2675 typedef struct { 2676 Object *target_obj; 2677 char *target_name; 2678 } AliasProperty; 2679 2680 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2681 void *opaque, Error **errp) 2682 { 2683 AliasProperty *prop = opaque; 2684 2685 object_property_get(prop->target_obj, prop->target_name, v, errp); 2686 } 2687 2688 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2689 void *opaque, Error **errp) 2690 { 2691 AliasProperty *prop = opaque; 2692 2693 object_property_set(prop->target_obj, prop->target_name, v, errp); 2694 } 2695 2696 static Object *property_resolve_alias(Object *obj, void *opaque, 2697 const char *part) 2698 { 2699 AliasProperty *prop = opaque; 2700 2701 return object_resolve_path_component(prop->target_obj, prop->target_name); 2702 } 2703 2704 static void property_release_alias(Object *obj, const char *name, void *opaque) 2705 { 2706 AliasProperty *prop = opaque; 2707 2708 g_free(prop->target_name); 2709 g_free(prop); 2710 } 2711 2712 ObjectProperty * 2713 object_property_add_alias(Object *obj, const char *name, 2714 Object *target_obj, const char *target_name) 2715 { 2716 AliasProperty *prop; 2717 ObjectProperty *op; 2718 ObjectProperty *target_prop; 2719 g_autofree char *prop_type = NULL; 2720 2721 target_prop = object_property_find_err(target_obj, target_name, 2722 &error_abort); 2723 2724 if (object_property_is_child(target_prop)) { 2725 prop_type = g_strdup_printf("link%s", 2726 target_prop->type + strlen("child")); 2727 } else { 2728 prop_type = g_strdup(target_prop->type); 2729 } 2730 2731 prop = g_malloc(sizeof(*prop)); 2732 prop->target_obj = target_obj; 2733 prop->target_name = g_strdup(target_name); 2734 2735 op = object_property_add(obj, name, prop_type, 2736 property_get_alias, 2737 property_set_alias, 2738 property_release_alias, 2739 prop); 2740 op->resolve = property_resolve_alias; 2741 if (target_prop->defval) { 2742 op->defval = qobject_ref(target_prop->defval); 2743 } 2744 2745 object_property_set_description(obj, op->name, 2746 target_prop->description); 2747 return op; 2748 } 2749 2750 void object_property_set_description(Object *obj, const char *name, 2751 const char *description) 2752 { 2753 ObjectProperty *op; 2754 2755 op = object_property_find_err(obj, name, &error_abort); 2756 g_free(op->description); 2757 op->description = g_strdup(description); 2758 } 2759 2760 void object_class_property_set_description(ObjectClass *klass, 2761 const char *name, 2762 const char *description) 2763 { 2764 ObjectProperty *op; 2765 2766 op = g_hash_table_lookup(klass->properties, name); 2767 g_free(op->description); 2768 op->description = g_strdup(description); 2769 } 2770 2771 static void object_class_init(ObjectClass *klass, void *data) 2772 { 2773 object_class_property_add_str(klass, "type", object_get_type, 2774 NULL); 2775 } 2776 2777 static void register_types(void) 2778 { 2779 static TypeInfo interface_info = { 2780 .name = TYPE_INTERFACE, 2781 .class_size = sizeof(InterfaceClass), 2782 .abstract = true, 2783 }; 2784 2785 static TypeInfo object_info = { 2786 .name = TYPE_OBJECT, 2787 .instance_size = sizeof(Object), 2788 .class_init = object_class_init, 2789 .abstract = true, 2790 }; 2791 2792 type_interface = type_register_internal(&interface_info); 2793 type_register_internal(&object_info); 2794 } 2795 2796 type_init(register_types) 2797