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 if (obj->free) { 689 obj->free(obj); 690 } 691 } 692 693 /* Find the minimum alignment guaranteed by the system malloc. */ 694 #if __STDC_VERSION__ >= 201112L 695 typddef max_align_t qemu_max_align_t; 696 #else 697 typedef union { 698 long l; 699 void *p; 700 double d; 701 long double ld; 702 } qemu_max_align_t; 703 #endif 704 705 static Object *object_new_with_type(Type type) 706 { 707 Object *obj; 708 size_t size, align; 709 void (*obj_free)(void *); 710 711 g_assert(type != NULL); 712 type_initialize(type); 713 714 size = type->instance_size; 715 align = type->instance_align; 716 717 /* 718 * Do not use qemu_memalign unless required. Depending on the 719 * implementation, extra alignment implies extra overhead. 720 */ 721 if (likely(align <= __alignof__(qemu_max_align_t))) { 722 obj = g_malloc(size); 723 obj_free = g_free; 724 } else { 725 obj = qemu_memalign(align, size); 726 obj_free = qemu_vfree; 727 } 728 729 object_initialize_with_type(obj, size, type); 730 obj->free = obj_free; 731 732 return obj; 733 } 734 735 Object *object_new_with_class(ObjectClass *klass) 736 { 737 return object_new_with_type(klass->type); 738 } 739 740 Object *object_new(const char *typename) 741 { 742 TypeImpl *ti = type_get_by_name(typename); 743 744 return object_new_with_type(ti); 745 } 746 747 748 Object *object_new_with_props(const char *typename, 749 Object *parent, 750 const char *id, 751 Error **errp, 752 ...) 753 { 754 va_list vargs; 755 Object *obj; 756 757 va_start(vargs, errp); 758 obj = object_new_with_propv(typename, parent, id, errp, vargs); 759 va_end(vargs); 760 761 return obj; 762 } 763 764 765 Object *object_new_with_propv(const char *typename, 766 Object *parent, 767 const char *id, 768 Error **errp, 769 va_list vargs) 770 { 771 Object *obj; 772 ObjectClass *klass; 773 UserCreatable *uc; 774 775 klass = object_class_by_name(typename); 776 if (!klass) { 777 error_setg(errp, "invalid object type: %s", typename); 778 return NULL; 779 } 780 781 if (object_class_is_abstract(klass)) { 782 error_setg(errp, "object type '%s' is abstract", typename); 783 return NULL; 784 } 785 obj = object_new_with_type(klass->type); 786 787 if (!object_set_propv(obj, errp, vargs)) { 788 goto error; 789 } 790 791 if (id != NULL) { 792 object_property_add_child(parent, id, obj); 793 } 794 795 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 796 if (uc) { 797 if (!user_creatable_complete(uc, errp)) { 798 if (id != NULL) { 799 object_unparent(obj); 800 } 801 goto error; 802 } 803 } 804 805 object_unref(obj); 806 return obj; 807 808 error: 809 object_unref(obj); 810 return NULL; 811 } 812 813 814 bool object_set_props(Object *obj, 815 Error **errp, 816 ...) 817 { 818 va_list vargs; 819 bool ret; 820 821 va_start(vargs, errp); 822 ret = object_set_propv(obj, errp, vargs); 823 va_end(vargs); 824 825 return ret; 826 } 827 828 829 bool object_set_propv(Object *obj, 830 Error **errp, 831 va_list vargs) 832 { 833 const char *propname; 834 835 propname = va_arg(vargs, char *); 836 while (propname != NULL) { 837 const char *value = va_arg(vargs, char *); 838 839 g_assert(value != NULL); 840 if (!object_property_parse(obj, propname, value, errp)) { 841 return false; 842 } 843 propname = va_arg(vargs, char *); 844 } 845 846 return true; 847 } 848 849 850 Object *object_dynamic_cast(Object *obj, const char *typename) 851 { 852 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) { 853 return obj; 854 } 855 856 return NULL; 857 } 858 859 Object *object_dynamic_cast_assert(Object *obj, const char *typename, 860 const char *file, int line, const char *func) 861 { 862 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)", 863 typename, file, line, func); 864 865 #ifdef CONFIG_QOM_CAST_DEBUG 866 int i; 867 Object *inst; 868 869 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) { 870 if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) { 871 goto out; 872 } 873 } 874 875 inst = object_dynamic_cast(obj, typename); 876 877 if (!inst && obj) { 878 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 879 file, line, func, obj, typename); 880 abort(); 881 } 882 883 assert(obj == inst); 884 885 if (obj && obj == inst) { 886 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 887 qatomic_set(&obj->class->object_cast_cache[i - 1], 888 qatomic_read(&obj->class->object_cast_cache[i])); 889 } 890 qatomic_set(&obj->class->object_cast_cache[i - 1], typename); 891 } 892 893 out: 894 #endif 895 return obj; 896 } 897 898 ObjectClass *object_class_dynamic_cast(ObjectClass *class, 899 const char *typename) 900 { 901 ObjectClass *ret = NULL; 902 TypeImpl *target_type; 903 TypeImpl *type; 904 905 if (!class) { 906 return NULL; 907 } 908 909 /* A simple fast path that can trigger a lot for leaf classes. */ 910 type = class->type; 911 if (type->name == typename) { 912 return class; 913 } 914 915 target_type = type_get_by_name(typename); 916 if (!target_type) { 917 /* target class type unknown, so fail the cast */ 918 return NULL; 919 } 920 921 if (type->class->interfaces && 922 type_is_ancestor(target_type, type_interface)) { 923 int found = 0; 924 GSList *i; 925 926 for (i = class->interfaces; i; i = i->next) { 927 ObjectClass *target_class = i->data; 928 929 if (type_is_ancestor(target_class->type, target_type)) { 930 ret = target_class; 931 found++; 932 } 933 } 934 935 /* The match was ambiguous, don't allow a cast */ 936 if (found > 1) { 937 ret = NULL; 938 } 939 } else if (type_is_ancestor(type, target_type)) { 940 ret = class; 941 } 942 943 return ret; 944 } 945 946 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, 947 const char *typename, 948 const char *file, int line, 949 const char *func) 950 { 951 ObjectClass *ret; 952 953 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)", 954 typename, file, line, func); 955 956 #ifdef CONFIG_QOM_CAST_DEBUG 957 int i; 958 959 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { 960 if (qatomic_read(&class->class_cast_cache[i]) == typename) { 961 ret = class; 962 goto out; 963 } 964 } 965 #else 966 if (!class || !class->interfaces) { 967 return class; 968 } 969 #endif 970 971 ret = object_class_dynamic_cast(class, typename); 972 if (!ret && class) { 973 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 974 file, line, func, class, typename); 975 abort(); 976 } 977 978 #ifdef CONFIG_QOM_CAST_DEBUG 979 if (class && ret == class) { 980 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 981 qatomic_set(&class->class_cast_cache[i - 1], 982 qatomic_read(&class->class_cast_cache[i])); 983 } 984 qatomic_set(&class->class_cast_cache[i - 1], typename); 985 } 986 out: 987 #endif 988 return ret; 989 } 990 991 const char *object_get_typename(const Object *obj) 992 { 993 return obj->class->type->name; 994 } 995 996 ObjectClass *object_get_class(Object *obj) 997 { 998 return obj->class; 999 } 1000 1001 bool object_class_is_abstract(ObjectClass *klass) 1002 { 1003 return klass->type->abstract; 1004 } 1005 1006 const char *object_class_get_name(ObjectClass *klass) 1007 { 1008 return klass->type->name; 1009 } 1010 1011 ObjectClass *object_class_by_name(const char *typename) 1012 { 1013 TypeImpl *type = type_get_by_name(typename); 1014 1015 if (!type) { 1016 return NULL; 1017 } 1018 1019 type_initialize(type); 1020 1021 return type->class; 1022 } 1023 1024 ObjectClass *module_object_class_by_name(const char *typename) 1025 { 1026 ObjectClass *oc; 1027 1028 oc = object_class_by_name(typename); 1029 #ifdef CONFIG_MODULES 1030 if (!oc) { 1031 module_load_qom_one(typename); 1032 oc = object_class_by_name(typename); 1033 } 1034 #endif 1035 return oc; 1036 } 1037 1038 ObjectClass *object_class_get_parent(ObjectClass *class) 1039 { 1040 TypeImpl *type = type_get_parent(class->type); 1041 1042 if (!type) { 1043 return NULL; 1044 } 1045 1046 type_initialize(type); 1047 1048 return type->class; 1049 } 1050 1051 typedef struct OCFData 1052 { 1053 void (*fn)(ObjectClass *klass, void *opaque); 1054 const char *implements_type; 1055 bool include_abstract; 1056 void *opaque; 1057 } OCFData; 1058 1059 static void object_class_foreach_tramp(gpointer key, gpointer value, 1060 gpointer opaque) 1061 { 1062 OCFData *data = opaque; 1063 TypeImpl *type = value; 1064 ObjectClass *k; 1065 1066 type_initialize(type); 1067 k = type->class; 1068 1069 if (!data->include_abstract && type->abstract) { 1070 return; 1071 } 1072 1073 if (data->implements_type && 1074 !object_class_dynamic_cast(k, data->implements_type)) { 1075 return; 1076 } 1077 1078 data->fn(k, data->opaque); 1079 } 1080 1081 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), 1082 const char *implements_type, bool include_abstract, 1083 void *opaque) 1084 { 1085 OCFData data = { fn, implements_type, include_abstract, opaque }; 1086 1087 enumerating_types = true; 1088 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); 1089 enumerating_types = false; 1090 } 1091 1092 static int do_object_child_foreach(Object *obj, 1093 int (*fn)(Object *child, void *opaque), 1094 void *opaque, bool recurse) 1095 { 1096 GHashTableIter iter; 1097 ObjectProperty *prop; 1098 int ret = 0; 1099 1100 g_hash_table_iter_init(&iter, obj->properties); 1101 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1102 if (object_property_is_child(prop)) { 1103 Object *child = prop->opaque; 1104 1105 ret = fn(child, opaque); 1106 if (ret != 0) { 1107 break; 1108 } 1109 if (recurse) { 1110 ret = do_object_child_foreach(child, fn, opaque, true); 1111 if (ret != 0) { 1112 break; 1113 } 1114 } 1115 } 1116 } 1117 return ret; 1118 } 1119 1120 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), 1121 void *opaque) 1122 { 1123 return do_object_child_foreach(obj, fn, opaque, false); 1124 } 1125 1126 int object_child_foreach_recursive(Object *obj, 1127 int (*fn)(Object *child, void *opaque), 1128 void *opaque) 1129 { 1130 return do_object_child_foreach(obj, fn, opaque, true); 1131 } 1132 1133 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) 1134 { 1135 GSList **list = opaque; 1136 1137 *list = g_slist_prepend(*list, klass); 1138 } 1139 1140 GSList *object_class_get_list(const char *implements_type, 1141 bool include_abstract) 1142 { 1143 GSList *list = NULL; 1144 1145 object_class_foreach(object_class_get_list_tramp, 1146 implements_type, include_abstract, &list); 1147 return list; 1148 } 1149 1150 static gint object_class_cmp(gconstpointer a, gconstpointer b) 1151 { 1152 return strcasecmp(object_class_get_name((ObjectClass *)a), 1153 object_class_get_name((ObjectClass *)b)); 1154 } 1155 1156 GSList *object_class_get_list_sorted(const char *implements_type, 1157 bool include_abstract) 1158 { 1159 return g_slist_sort(object_class_get_list(implements_type, include_abstract), 1160 object_class_cmp); 1161 } 1162 1163 Object *object_ref(void *objptr) 1164 { 1165 Object *obj = OBJECT(objptr); 1166 if (!obj) { 1167 return NULL; 1168 } 1169 qatomic_inc(&obj->ref); 1170 return obj; 1171 } 1172 1173 void object_unref(void *objptr) 1174 { 1175 Object *obj = OBJECT(objptr); 1176 if (!obj) { 1177 return; 1178 } 1179 g_assert(obj->ref > 0); 1180 1181 /* parent always holds a reference to its children */ 1182 if (qatomic_fetch_dec(&obj->ref) == 1) { 1183 object_finalize(obj); 1184 } 1185 } 1186 1187 ObjectProperty * 1188 object_property_try_add(Object *obj, const char *name, const char *type, 1189 ObjectPropertyAccessor *get, 1190 ObjectPropertyAccessor *set, 1191 ObjectPropertyRelease *release, 1192 void *opaque, Error **errp) 1193 { 1194 ObjectProperty *prop; 1195 size_t name_len = strlen(name); 1196 1197 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1198 int i; 1199 ObjectProperty *ret; 1200 char *name_no_array = g_strdup(name); 1201 1202 name_no_array[name_len - 3] = '\0'; 1203 for (i = 0; ; ++i) { 1204 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1205 1206 ret = object_property_try_add(obj, full_name, type, get, set, 1207 release, opaque, NULL); 1208 g_free(full_name); 1209 if (ret) { 1210 break; 1211 } 1212 } 1213 g_free(name_no_array); 1214 return ret; 1215 } 1216 1217 if (object_property_find(obj, name) != NULL) { 1218 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1219 name, object_get_typename(obj)); 1220 return NULL; 1221 } 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(obj->properties, prop->name, prop); 1234 return prop; 1235 } 1236 1237 ObjectProperty * 1238 object_property_add(Object *obj, const char *name, const char *type, 1239 ObjectPropertyAccessor *get, 1240 ObjectPropertyAccessor *set, 1241 ObjectPropertyRelease *release, 1242 void *opaque) 1243 { 1244 return object_property_try_add(obj, name, type, get, set, release, 1245 opaque, &error_abort); 1246 } 1247 1248 ObjectProperty * 1249 object_class_property_add(ObjectClass *klass, 1250 const char *name, 1251 const char *type, 1252 ObjectPropertyAccessor *get, 1253 ObjectPropertyAccessor *set, 1254 ObjectPropertyRelease *release, 1255 void *opaque) 1256 { 1257 ObjectProperty *prop; 1258 1259 assert(!object_class_property_find(klass, name)); 1260 1261 prop = g_malloc0(sizeof(*prop)); 1262 1263 prop->name = g_strdup(name); 1264 prop->type = g_strdup(type); 1265 1266 prop->get = get; 1267 prop->set = set; 1268 prop->release = release; 1269 prop->opaque = opaque; 1270 1271 g_hash_table_insert(klass->properties, prop->name, prop); 1272 1273 return prop; 1274 } 1275 1276 ObjectProperty *object_property_find(Object *obj, const char *name) 1277 { 1278 ObjectProperty *prop; 1279 ObjectClass *klass = object_get_class(obj); 1280 1281 prop = object_class_property_find(klass, name); 1282 if (prop) { 1283 return prop; 1284 } 1285 1286 return g_hash_table_lookup(obj->properties, name); 1287 } 1288 1289 ObjectProperty *object_property_find_err(Object *obj, const char *name, 1290 Error **errp) 1291 { 1292 ObjectProperty *prop = object_property_find(obj, name); 1293 if (!prop) { 1294 error_setg(errp, "Property '%s.%s' not found", 1295 object_get_typename(obj), name); 1296 } 1297 return prop; 1298 } 1299 1300 void object_property_iter_init(ObjectPropertyIterator *iter, 1301 Object *obj) 1302 { 1303 g_hash_table_iter_init(&iter->iter, obj->properties); 1304 iter->nextclass = object_get_class(obj); 1305 } 1306 1307 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1308 { 1309 gpointer key, val; 1310 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1311 if (!iter->nextclass) { 1312 return NULL; 1313 } 1314 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1315 iter->nextclass = object_class_get_parent(iter->nextclass); 1316 } 1317 return val; 1318 } 1319 1320 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1321 ObjectClass *klass) 1322 { 1323 g_hash_table_iter_init(&iter->iter, klass->properties); 1324 iter->nextclass = object_class_get_parent(klass); 1325 } 1326 1327 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name) 1328 { 1329 ObjectClass *parent_klass; 1330 1331 parent_klass = object_class_get_parent(klass); 1332 if (parent_klass) { 1333 ObjectProperty *prop = 1334 object_class_property_find(parent_klass, name); 1335 if (prop) { 1336 return prop; 1337 } 1338 } 1339 1340 return g_hash_table_lookup(klass->properties, name); 1341 } 1342 1343 ObjectProperty *object_class_property_find_err(ObjectClass *klass, 1344 const char *name, 1345 Error **errp) 1346 { 1347 ObjectProperty *prop = object_class_property_find(klass, name); 1348 if (!prop) { 1349 error_setg(errp, "Property '.%s' not found", name); 1350 } 1351 return prop; 1352 } 1353 1354 1355 void object_property_del(Object *obj, const char *name) 1356 { 1357 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1358 1359 if (prop->release) { 1360 prop->release(obj, name, prop->opaque); 1361 } 1362 g_hash_table_remove(obj->properties, name); 1363 } 1364 1365 bool object_property_get(Object *obj, const char *name, Visitor *v, 1366 Error **errp) 1367 { 1368 Error *err = NULL; 1369 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1370 1371 if (prop == NULL) { 1372 return false; 1373 } 1374 1375 if (!prop->get) { 1376 error_setg(errp, QERR_PERMISSION_DENIED); 1377 return false; 1378 } 1379 prop->get(obj, v, name, prop->opaque, &err); 1380 error_propagate(errp, err); 1381 return !err; 1382 } 1383 1384 bool object_property_set(Object *obj, const char *name, Visitor *v, 1385 Error **errp) 1386 { 1387 Error *err = NULL; 1388 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1389 1390 if (prop == NULL) { 1391 return false; 1392 } 1393 1394 if (!prop->set) { 1395 error_setg(errp, QERR_PERMISSION_DENIED); 1396 return false; 1397 } 1398 prop->set(obj, v, name, prop->opaque, &err); 1399 error_propagate(errp, err); 1400 return !err; 1401 } 1402 1403 bool object_property_set_str(Object *obj, const char *name, 1404 const char *value, Error **errp) 1405 { 1406 QString *qstr = qstring_from_str(value); 1407 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1408 1409 qobject_unref(qstr); 1410 return ok; 1411 } 1412 1413 char *object_property_get_str(Object *obj, const char *name, 1414 Error **errp) 1415 { 1416 QObject *ret = object_property_get_qobject(obj, name, errp); 1417 char *retval; 1418 1419 if (!ret) { 1420 return NULL; 1421 } 1422 1423 retval = g_strdup(qobject_get_try_str(ret)); 1424 if (!retval) { 1425 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1426 } 1427 1428 qobject_unref(ret); 1429 return retval; 1430 } 1431 1432 bool object_property_set_link(Object *obj, const char *name, 1433 Object *value, Error **errp) 1434 { 1435 g_autofree char *path = NULL; 1436 1437 if (value) { 1438 path = object_get_canonical_path(value); 1439 } 1440 return object_property_set_str(obj, name, path ?: "", errp); 1441 } 1442 1443 Object *object_property_get_link(Object *obj, const char *name, 1444 Error **errp) 1445 { 1446 char *str = object_property_get_str(obj, name, errp); 1447 Object *target = NULL; 1448 1449 if (str && *str) { 1450 target = object_resolve_path(str, NULL); 1451 if (!target) { 1452 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1453 "Device '%s' not found", str); 1454 } 1455 } 1456 1457 g_free(str); 1458 return target; 1459 } 1460 1461 bool object_property_set_bool(Object *obj, const char *name, 1462 bool value, Error **errp) 1463 { 1464 QBool *qbool = qbool_from_bool(value); 1465 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1466 1467 qobject_unref(qbool); 1468 return ok; 1469 } 1470 1471 bool object_property_get_bool(Object *obj, const char *name, 1472 Error **errp) 1473 { 1474 QObject *ret = object_property_get_qobject(obj, name, errp); 1475 QBool *qbool; 1476 bool retval; 1477 1478 if (!ret) { 1479 return false; 1480 } 1481 qbool = qobject_to(QBool, ret); 1482 if (!qbool) { 1483 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1484 retval = false; 1485 } else { 1486 retval = qbool_get_bool(qbool); 1487 } 1488 1489 qobject_unref(ret); 1490 return retval; 1491 } 1492 1493 bool object_property_set_int(Object *obj, const char *name, 1494 int64_t value, Error **errp) 1495 { 1496 QNum *qnum = qnum_from_int(value); 1497 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1498 1499 qobject_unref(qnum); 1500 return ok; 1501 } 1502 1503 int64_t object_property_get_int(Object *obj, const char *name, 1504 Error **errp) 1505 { 1506 QObject *ret = object_property_get_qobject(obj, name, errp); 1507 QNum *qnum; 1508 int64_t retval; 1509 1510 if (!ret) { 1511 return -1; 1512 } 1513 1514 qnum = qobject_to(QNum, ret); 1515 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1516 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1517 retval = -1; 1518 } 1519 1520 qobject_unref(ret); 1521 return retval; 1522 } 1523 1524 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1525 { 1526 Visitor *v = qobject_input_visitor_new(prop->defval); 1527 1528 assert(prop->set != NULL); 1529 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1530 1531 visit_free(v); 1532 } 1533 1534 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1535 { 1536 assert(!prop->defval); 1537 assert(!prop->init); 1538 1539 prop->defval = defval; 1540 prop->init = object_property_init_defval; 1541 } 1542 1543 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1544 { 1545 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1546 } 1547 1548 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1549 { 1550 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1551 } 1552 1553 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1554 { 1555 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1556 } 1557 1558 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1559 { 1560 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1561 } 1562 1563 bool object_property_set_uint(Object *obj, const char *name, 1564 uint64_t value, Error **errp) 1565 { 1566 QNum *qnum = qnum_from_uint(value); 1567 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1568 1569 qobject_unref(qnum); 1570 return ok; 1571 } 1572 1573 uint64_t object_property_get_uint(Object *obj, const char *name, 1574 Error **errp) 1575 { 1576 QObject *ret = object_property_get_qobject(obj, name, errp); 1577 QNum *qnum; 1578 uint64_t retval; 1579 1580 if (!ret) { 1581 return 0; 1582 } 1583 qnum = qobject_to(QNum, ret); 1584 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1585 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1586 retval = 0; 1587 } 1588 1589 qobject_unref(ret); 1590 return retval; 1591 } 1592 1593 typedef struct EnumProperty { 1594 const QEnumLookup *lookup; 1595 int (*get)(Object *, Error **); 1596 void (*set)(Object *, int, Error **); 1597 } EnumProperty; 1598 1599 int object_property_get_enum(Object *obj, const char *name, 1600 const char *typename, Error **errp) 1601 { 1602 char *str; 1603 int ret; 1604 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1605 EnumProperty *enumprop; 1606 1607 if (prop == NULL) { 1608 return -1; 1609 } 1610 1611 if (!g_str_equal(prop->type, typename)) { 1612 error_setg(errp, "Property %s on %s is not '%s' enum type", 1613 name, object_class_get_name( 1614 object_get_class(obj)), typename); 1615 return -1; 1616 } 1617 1618 enumprop = prop->opaque; 1619 1620 str = object_property_get_str(obj, name, errp); 1621 if (!str) { 1622 return -1; 1623 } 1624 1625 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1626 g_free(str); 1627 1628 return ret; 1629 } 1630 1631 bool object_property_parse(Object *obj, const char *name, 1632 const char *string, Error **errp) 1633 { 1634 Visitor *v = string_input_visitor_new(string); 1635 bool ok = object_property_set(obj, name, v, errp); 1636 1637 visit_free(v); 1638 return ok; 1639 } 1640 1641 char *object_property_print(Object *obj, const char *name, bool human, 1642 Error **errp) 1643 { 1644 Visitor *v; 1645 char *string = NULL; 1646 1647 v = string_output_visitor_new(human, &string); 1648 if (!object_property_get(obj, name, v, errp)) { 1649 goto out; 1650 } 1651 1652 visit_complete(v, &string); 1653 1654 out: 1655 visit_free(v); 1656 return string; 1657 } 1658 1659 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1660 { 1661 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1662 if (prop == NULL) { 1663 return NULL; 1664 } 1665 1666 return prop->type; 1667 } 1668 1669 Object *object_get_root(void) 1670 { 1671 static Object *root; 1672 1673 if (!root) { 1674 root = object_new("container"); 1675 } 1676 1677 return root; 1678 } 1679 1680 Object *object_get_objects_root(void) 1681 { 1682 return container_get(object_get_root(), "/objects"); 1683 } 1684 1685 Object *object_get_internal_root(void) 1686 { 1687 static Object *internal_root; 1688 1689 if (!internal_root) { 1690 internal_root = object_new("container"); 1691 } 1692 1693 return internal_root; 1694 } 1695 1696 static void object_get_child_property(Object *obj, Visitor *v, 1697 const char *name, void *opaque, 1698 Error **errp) 1699 { 1700 Object *child = opaque; 1701 char *path; 1702 1703 path = object_get_canonical_path(child); 1704 visit_type_str(v, name, &path, errp); 1705 g_free(path); 1706 } 1707 1708 static Object *object_resolve_child_property(Object *parent, void *opaque, 1709 const char *part) 1710 { 1711 return opaque; 1712 } 1713 1714 static void object_finalize_child_property(Object *obj, const char *name, 1715 void *opaque) 1716 { 1717 Object *child = opaque; 1718 1719 if (child->class->unparent) { 1720 (child->class->unparent)(child); 1721 } 1722 child->parent = NULL; 1723 object_unref(child); 1724 } 1725 1726 ObjectProperty * 1727 object_property_try_add_child(Object *obj, const char *name, 1728 Object *child, Error **errp) 1729 { 1730 g_autofree char *type = NULL; 1731 ObjectProperty *op; 1732 1733 assert(!child->parent); 1734 1735 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1736 1737 op = object_property_try_add(obj, name, type, object_get_child_property, 1738 NULL, object_finalize_child_property, 1739 child, errp); 1740 if (!op) { 1741 return NULL; 1742 } 1743 op->resolve = object_resolve_child_property; 1744 object_ref(child); 1745 child->parent = obj; 1746 return op; 1747 } 1748 1749 ObjectProperty * 1750 object_property_add_child(Object *obj, const char *name, 1751 Object *child) 1752 { 1753 return object_property_try_add_child(obj, name, child, &error_abort); 1754 } 1755 1756 void object_property_allow_set_link(const Object *obj, const char *name, 1757 Object *val, Error **errp) 1758 { 1759 /* Allow the link to be set, always */ 1760 } 1761 1762 typedef struct { 1763 union { 1764 Object **targetp; 1765 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1766 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1767 }; 1768 void (*check)(const Object *, const char *, Object *, Error **); 1769 ObjectPropertyLinkFlags flags; 1770 } LinkProperty; 1771 1772 static Object ** 1773 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1774 { 1775 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1776 return &lprop->target; 1777 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1778 return (void *)obj + lprop->offset; 1779 } else { 1780 return lprop->targetp; 1781 } 1782 } 1783 1784 static void object_get_link_property(Object *obj, Visitor *v, 1785 const char *name, void *opaque, 1786 Error **errp) 1787 { 1788 LinkProperty *lprop = opaque; 1789 Object **targetp = object_link_get_targetp(obj, lprop); 1790 char *path; 1791 1792 if (*targetp) { 1793 path = object_get_canonical_path(*targetp); 1794 visit_type_str(v, name, &path, errp); 1795 g_free(path); 1796 } else { 1797 path = (char *)""; 1798 visit_type_str(v, name, &path, errp); 1799 } 1800 } 1801 1802 /* 1803 * object_resolve_link: 1804 * 1805 * Lookup an object and ensure its type matches the link property type. This 1806 * is similar to object_resolve_path() except type verification against the 1807 * link property is performed. 1808 * 1809 * Returns: The matched object or NULL on path lookup failures. 1810 */ 1811 static Object *object_resolve_link(Object *obj, const char *name, 1812 const char *path, Error **errp) 1813 { 1814 const char *type; 1815 char *target_type; 1816 bool ambiguous = false; 1817 Object *target; 1818 1819 /* Go from link<FOO> to FOO. */ 1820 type = object_property_get_type(obj, name, NULL); 1821 target_type = g_strndup(&type[5], strlen(type) - 6); 1822 target = object_resolve_path_type(path, target_type, &ambiguous); 1823 1824 if (ambiguous) { 1825 error_setg(errp, "Path '%s' does not uniquely identify an object", 1826 path); 1827 } else if (!target) { 1828 target = object_resolve_path(path, &ambiguous); 1829 if (target || ambiguous) { 1830 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1831 } else { 1832 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1833 "Device '%s' not found", path); 1834 } 1835 target = NULL; 1836 } 1837 g_free(target_type); 1838 1839 return target; 1840 } 1841 1842 static void object_set_link_property(Object *obj, Visitor *v, 1843 const char *name, void *opaque, 1844 Error **errp) 1845 { 1846 Error *local_err = NULL; 1847 LinkProperty *prop = opaque; 1848 Object **targetp = object_link_get_targetp(obj, prop); 1849 Object *old_target = *targetp; 1850 Object *new_target; 1851 char *path = NULL; 1852 1853 if (!visit_type_str(v, name, &path, errp)) { 1854 return; 1855 } 1856 1857 if (*path) { 1858 new_target = object_resolve_link(obj, name, path, errp); 1859 if (!new_target) { 1860 g_free(path); 1861 return; 1862 } 1863 } else { 1864 new_target = NULL; 1865 } 1866 1867 g_free(path); 1868 1869 prop->check(obj, name, new_target, &local_err); 1870 if (local_err) { 1871 error_propagate(errp, local_err); 1872 return; 1873 } 1874 1875 *targetp = new_target; 1876 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1877 object_ref(new_target); 1878 object_unref(old_target); 1879 } 1880 } 1881 1882 static Object *object_resolve_link_property(Object *parent, void *opaque, 1883 const char *part) 1884 { 1885 LinkProperty *lprop = opaque; 1886 1887 return *object_link_get_targetp(parent, lprop); 1888 } 1889 1890 static void object_release_link_property(Object *obj, const char *name, 1891 void *opaque) 1892 { 1893 LinkProperty *prop = opaque; 1894 Object **targetp = object_link_get_targetp(obj, prop); 1895 1896 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1897 object_unref(*targetp); 1898 } 1899 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1900 g_free(prop); 1901 } 1902 } 1903 1904 static ObjectProperty * 1905 object_add_link_prop(Object *obj, const char *name, 1906 const char *type, void *ptr, 1907 void (*check)(const Object *, const char *, 1908 Object *, Error **), 1909 ObjectPropertyLinkFlags flags) 1910 { 1911 LinkProperty *prop = g_malloc(sizeof(*prop)); 1912 g_autofree char *full_type = NULL; 1913 ObjectProperty *op; 1914 1915 if (flags & OBJ_PROP_LINK_DIRECT) { 1916 prop->target = ptr; 1917 } else { 1918 prop->targetp = ptr; 1919 } 1920 prop->check = check; 1921 prop->flags = flags; 1922 1923 full_type = g_strdup_printf("link<%s>", type); 1924 1925 op = object_property_add(obj, name, full_type, 1926 object_get_link_property, 1927 check ? object_set_link_property : NULL, 1928 object_release_link_property, 1929 prop); 1930 op->resolve = object_resolve_link_property; 1931 return op; 1932 } 1933 1934 ObjectProperty * 1935 object_property_add_link(Object *obj, const char *name, 1936 const char *type, Object **targetp, 1937 void (*check)(const Object *, const char *, 1938 Object *, Error **), 1939 ObjectPropertyLinkFlags flags) 1940 { 1941 return object_add_link_prop(obj, name, type, targetp, check, flags); 1942 } 1943 1944 ObjectProperty * 1945 object_class_property_add_link(ObjectClass *oc, 1946 const char *name, 1947 const char *type, ptrdiff_t offset, 1948 void (*check)(const Object *obj, const char *name, 1949 Object *val, Error **errp), 1950 ObjectPropertyLinkFlags flags) 1951 { 1952 LinkProperty *prop = g_new0(LinkProperty, 1); 1953 char *full_type; 1954 ObjectProperty *op; 1955 1956 prop->offset = offset; 1957 prop->check = check; 1958 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1959 1960 full_type = g_strdup_printf("link<%s>", type); 1961 1962 op = object_class_property_add(oc, name, full_type, 1963 object_get_link_property, 1964 check ? object_set_link_property : NULL, 1965 object_release_link_property, 1966 prop); 1967 1968 op->resolve = object_resolve_link_property; 1969 1970 g_free(full_type); 1971 return op; 1972 } 1973 1974 ObjectProperty * 1975 object_property_add_const_link(Object *obj, const char *name, 1976 Object *target) 1977 { 1978 return object_add_link_prop(obj, name, 1979 object_get_typename(target), target, 1980 NULL, OBJ_PROP_LINK_DIRECT); 1981 } 1982 1983 const char *object_get_canonical_path_component(const Object *obj) 1984 { 1985 ObjectProperty *prop = NULL; 1986 GHashTableIter iter; 1987 1988 if (obj->parent == NULL) { 1989 return NULL; 1990 } 1991 1992 g_hash_table_iter_init(&iter, obj->parent->properties); 1993 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1994 if (!object_property_is_child(prop)) { 1995 continue; 1996 } 1997 1998 if (prop->opaque == obj) { 1999 return prop->name; 2000 } 2001 } 2002 2003 /* obj had a parent but was not a child, should never happen */ 2004 g_assert_not_reached(); 2005 return NULL; 2006 } 2007 2008 char *object_get_canonical_path(const Object *obj) 2009 { 2010 Object *root = object_get_root(); 2011 char *newpath, *path = NULL; 2012 2013 if (obj == root) { 2014 return g_strdup("/"); 2015 } 2016 2017 do { 2018 const char *component = object_get_canonical_path_component(obj); 2019 2020 if (!component) { 2021 /* A canonical path must be complete, so discard what was 2022 * collected so far. 2023 */ 2024 g_free(path); 2025 return NULL; 2026 } 2027 2028 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 2029 g_free(path); 2030 path = newpath; 2031 obj = obj->parent; 2032 } while (obj != root); 2033 2034 return path; 2035 } 2036 2037 Object *object_resolve_path_component(Object *parent, const char *part) 2038 { 2039 ObjectProperty *prop = object_property_find(parent, part); 2040 if (prop == NULL) { 2041 return NULL; 2042 } 2043 2044 if (prop->resolve) { 2045 return prop->resolve(parent, prop->opaque, part); 2046 } else { 2047 return NULL; 2048 } 2049 } 2050 2051 static Object *object_resolve_abs_path(Object *parent, 2052 char **parts, 2053 const char *typename) 2054 { 2055 Object *child; 2056 2057 if (*parts == NULL) { 2058 return object_dynamic_cast(parent, typename); 2059 } 2060 2061 if (strcmp(*parts, "") == 0) { 2062 return object_resolve_abs_path(parent, parts + 1, typename); 2063 } 2064 2065 child = object_resolve_path_component(parent, *parts); 2066 if (!child) { 2067 return NULL; 2068 } 2069 2070 return object_resolve_abs_path(child, parts + 1, typename); 2071 } 2072 2073 static Object *object_resolve_partial_path(Object *parent, 2074 char **parts, 2075 const char *typename, 2076 bool *ambiguous) 2077 { 2078 Object *obj; 2079 GHashTableIter iter; 2080 ObjectProperty *prop; 2081 2082 obj = object_resolve_abs_path(parent, parts, typename); 2083 2084 g_hash_table_iter_init(&iter, parent->properties); 2085 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2086 Object *found; 2087 2088 if (!object_property_is_child(prop)) { 2089 continue; 2090 } 2091 2092 found = object_resolve_partial_path(prop->opaque, parts, 2093 typename, ambiguous); 2094 if (found) { 2095 if (obj) { 2096 *ambiguous = true; 2097 return NULL; 2098 } 2099 obj = found; 2100 } 2101 2102 if (*ambiguous) { 2103 return NULL; 2104 } 2105 } 2106 2107 return obj; 2108 } 2109 2110 Object *object_resolve_path_type(const char *path, const char *typename, 2111 bool *ambiguousp) 2112 { 2113 Object *obj; 2114 char **parts; 2115 2116 parts = g_strsplit(path, "/", 0); 2117 assert(parts); 2118 2119 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2120 bool ambiguous = false; 2121 obj = object_resolve_partial_path(object_get_root(), parts, 2122 typename, &ambiguous); 2123 if (ambiguousp) { 2124 *ambiguousp = ambiguous; 2125 } 2126 } else { 2127 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2128 } 2129 2130 g_strfreev(parts); 2131 2132 return obj; 2133 } 2134 2135 Object *object_resolve_path(const char *path, bool *ambiguous) 2136 { 2137 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2138 } 2139 2140 typedef struct StringProperty 2141 { 2142 char *(*get)(Object *, Error **); 2143 void (*set)(Object *, const char *, Error **); 2144 } StringProperty; 2145 2146 static void property_get_str(Object *obj, Visitor *v, const char *name, 2147 void *opaque, Error **errp) 2148 { 2149 StringProperty *prop = opaque; 2150 char *value; 2151 Error *err = NULL; 2152 2153 value = prop->get(obj, &err); 2154 if (err) { 2155 error_propagate(errp, err); 2156 return; 2157 } 2158 2159 visit_type_str(v, name, &value, errp); 2160 g_free(value); 2161 } 2162 2163 static void property_set_str(Object *obj, Visitor *v, const char *name, 2164 void *opaque, Error **errp) 2165 { 2166 StringProperty *prop = opaque; 2167 char *value; 2168 2169 if (!visit_type_str(v, name, &value, errp)) { 2170 return; 2171 } 2172 2173 prop->set(obj, value, errp); 2174 g_free(value); 2175 } 2176 2177 static void property_release_str(Object *obj, const char *name, 2178 void *opaque) 2179 { 2180 StringProperty *prop = opaque; 2181 g_free(prop); 2182 } 2183 2184 ObjectProperty * 2185 object_property_add_str(Object *obj, const char *name, 2186 char *(*get)(Object *, Error **), 2187 void (*set)(Object *, const char *, Error **)) 2188 { 2189 StringProperty *prop = g_malloc0(sizeof(*prop)); 2190 2191 prop->get = get; 2192 prop->set = set; 2193 2194 return object_property_add(obj, name, "string", 2195 get ? property_get_str : NULL, 2196 set ? property_set_str : NULL, 2197 property_release_str, 2198 prop); 2199 } 2200 2201 ObjectProperty * 2202 object_class_property_add_str(ObjectClass *klass, const char *name, 2203 char *(*get)(Object *, Error **), 2204 void (*set)(Object *, const char *, 2205 Error **)) 2206 { 2207 StringProperty *prop = g_malloc0(sizeof(*prop)); 2208 2209 prop->get = get; 2210 prop->set = set; 2211 2212 return object_class_property_add(klass, name, "string", 2213 get ? property_get_str : NULL, 2214 set ? property_set_str : NULL, 2215 NULL, 2216 prop); 2217 } 2218 2219 typedef struct BoolProperty 2220 { 2221 bool (*get)(Object *, Error **); 2222 void (*set)(Object *, bool, Error **); 2223 } BoolProperty; 2224 2225 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2226 void *opaque, Error **errp) 2227 { 2228 BoolProperty *prop = opaque; 2229 bool value; 2230 Error *err = NULL; 2231 2232 value = prop->get(obj, &err); 2233 if (err) { 2234 error_propagate(errp, err); 2235 return; 2236 } 2237 2238 visit_type_bool(v, name, &value, errp); 2239 } 2240 2241 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2242 void *opaque, Error **errp) 2243 { 2244 BoolProperty *prop = opaque; 2245 bool value; 2246 2247 if (!visit_type_bool(v, name, &value, errp)) { 2248 return; 2249 } 2250 2251 prop->set(obj, value, errp); 2252 } 2253 2254 static void property_release_bool(Object *obj, const char *name, 2255 void *opaque) 2256 { 2257 BoolProperty *prop = opaque; 2258 g_free(prop); 2259 } 2260 2261 ObjectProperty * 2262 object_property_add_bool(Object *obj, const char *name, 2263 bool (*get)(Object *, Error **), 2264 void (*set)(Object *, bool, Error **)) 2265 { 2266 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2267 2268 prop->get = get; 2269 prop->set = set; 2270 2271 return object_property_add(obj, name, "bool", 2272 get ? property_get_bool : NULL, 2273 set ? property_set_bool : NULL, 2274 property_release_bool, 2275 prop); 2276 } 2277 2278 ObjectProperty * 2279 object_class_property_add_bool(ObjectClass *klass, const char *name, 2280 bool (*get)(Object *, Error **), 2281 void (*set)(Object *, bool, Error **)) 2282 { 2283 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2284 2285 prop->get = get; 2286 prop->set = set; 2287 2288 return object_class_property_add(klass, name, "bool", 2289 get ? property_get_bool : NULL, 2290 set ? property_set_bool : NULL, 2291 NULL, 2292 prop); 2293 } 2294 2295 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2296 void *opaque, Error **errp) 2297 { 2298 EnumProperty *prop = opaque; 2299 int value; 2300 Error *err = NULL; 2301 2302 value = prop->get(obj, &err); 2303 if (err) { 2304 error_propagate(errp, err); 2305 return; 2306 } 2307 2308 visit_type_enum(v, name, &value, prop->lookup, errp); 2309 } 2310 2311 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2312 void *opaque, Error **errp) 2313 { 2314 EnumProperty *prop = opaque; 2315 int value; 2316 2317 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2318 return; 2319 } 2320 prop->set(obj, value, errp); 2321 } 2322 2323 static void property_release_enum(Object *obj, const char *name, 2324 void *opaque) 2325 { 2326 EnumProperty *prop = opaque; 2327 g_free(prop); 2328 } 2329 2330 ObjectProperty * 2331 object_property_add_enum(Object *obj, const char *name, 2332 const char *typename, 2333 const QEnumLookup *lookup, 2334 int (*get)(Object *, Error **), 2335 void (*set)(Object *, int, Error **)) 2336 { 2337 EnumProperty *prop = g_malloc(sizeof(*prop)); 2338 2339 prop->lookup = lookup; 2340 prop->get = get; 2341 prop->set = set; 2342 2343 return object_property_add(obj, name, typename, 2344 get ? property_get_enum : NULL, 2345 set ? property_set_enum : NULL, 2346 property_release_enum, 2347 prop); 2348 } 2349 2350 ObjectProperty * 2351 object_class_property_add_enum(ObjectClass *klass, const char *name, 2352 const char *typename, 2353 const QEnumLookup *lookup, 2354 int (*get)(Object *, Error **), 2355 void (*set)(Object *, int, Error **)) 2356 { 2357 EnumProperty *prop = g_malloc(sizeof(*prop)); 2358 2359 prop->lookup = lookup; 2360 prop->get = get; 2361 prop->set = set; 2362 2363 return object_class_property_add(klass, name, typename, 2364 get ? property_get_enum : NULL, 2365 set ? property_set_enum : NULL, 2366 NULL, 2367 prop); 2368 } 2369 2370 typedef struct TMProperty { 2371 void (*get)(Object *, struct tm *, Error **); 2372 } TMProperty; 2373 2374 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2375 void *opaque, Error **errp) 2376 { 2377 TMProperty *prop = opaque; 2378 Error *err = NULL; 2379 struct tm value; 2380 2381 prop->get(obj, &value, &err); 2382 if (err) { 2383 error_propagate(errp, err); 2384 return; 2385 } 2386 2387 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2388 return; 2389 } 2390 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2391 goto out_end; 2392 } 2393 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2394 goto out_end; 2395 } 2396 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2397 goto out_end; 2398 } 2399 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2400 goto out_end; 2401 } 2402 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2403 goto out_end; 2404 } 2405 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2406 goto out_end; 2407 } 2408 visit_check_struct(v, errp); 2409 out_end: 2410 visit_end_struct(v, NULL); 2411 } 2412 2413 static void property_release_tm(Object *obj, const char *name, 2414 void *opaque) 2415 { 2416 TMProperty *prop = opaque; 2417 g_free(prop); 2418 } 2419 2420 ObjectProperty * 2421 object_property_add_tm(Object *obj, const char *name, 2422 void (*get)(Object *, struct tm *, Error **)) 2423 { 2424 TMProperty *prop = g_malloc0(sizeof(*prop)); 2425 2426 prop->get = get; 2427 2428 return object_property_add(obj, name, "struct tm", 2429 get ? property_get_tm : NULL, NULL, 2430 property_release_tm, 2431 prop); 2432 } 2433 2434 ObjectProperty * 2435 object_class_property_add_tm(ObjectClass *klass, const char *name, 2436 void (*get)(Object *, struct tm *, Error **)) 2437 { 2438 TMProperty *prop = g_malloc0(sizeof(*prop)); 2439 2440 prop->get = get; 2441 2442 return object_class_property_add(klass, name, "struct tm", 2443 get ? property_get_tm : NULL, 2444 NULL, NULL, prop); 2445 } 2446 2447 static char *object_get_type(Object *obj, Error **errp) 2448 { 2449 return g_strdup(object_get_typename(obj)); 2450 } 2451 2452 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2453 void *opaque, Error **errp) 2454 { 2455 uint8_t value = *(uint8_t *)opaque; 2456 visit_type_uint8(v, name, &value, errp); 2457 } 2458 2459 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2460 void *opaque, Error **errp) 2461 { 2462 uint8_t *field = opaque; 2463 uint8_t value; 2464 2465 if (!visit_type_uint8(v, name, &value, errp)) { 2466 return; 2467 } 2468 2469 *field = value; 2470 } 2471 2472 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2473 void *opaque, Error **errp) 2474 { 2475 uint16_t value = *(uint16_t *)opaque; 2476 visit_type_uint16(v, name, &value, errp); 2477 } 2478 2479 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2480 void *opaque, Error **errp) 2481 { 2482 uint16_t *field = opaque; 2483 uint16_t value; 2484 2485 if (!visit_type_uint16(v, name, &value, errp)) { 2486 return; 2487 } 2488 2489 *field = value; 2490 } 2491 2492 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2493 void *opaque, Error **errp) 2494 { 2495 uint32_t value = *(uint32_t *)opaque; 2496 visit_type_uint32(v, name, &value, errp); 2497 } 2498 2499 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2500 void *opaque, Error **errp) 2501 { 2502 uint32_t *field = opaque; 2503 uint32_t value; 2504 2505 if (!visit_type_uint32(v, name, &value, errp)) { 2506 return; 2507 } 2508 2509 *field = value; 2510 } 2511 2512 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2513 void *opaque, Error **errp) 2514 { 2515 uint64_t value = *(uint64_t *)opaque; 2516 visit_type_uint64(v, name, &value, errp); 2517 } 2518 2519 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2520 void *opaque, Error **errp) 2521 { 2522 uint64_t *field = opaque; 2523 uint64_t value; 2524 2525 if (!visit_type_uint64(v, name, &value, errp)) { 2526 return; 2527 } 2528 2529 *field = value; 2530 } 2531 2532 ObjectProperty * 2533 object_property_add_uint8_ptr(Object *obj, const char *name, 2534 const uint8_t *v, 2535 ObjectPropertyFlags flags) 2536 { 2537 ObjectPropertyAccessor *getter = NULL; 2538 ObjectPropertyAccessor *setter = NULL; 2539 2540 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2541 getter = property_get_uint8_ptr; 2542 } 2543 2544 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2545 setter = property_set_uint8_ptr; 2546 } 2547 2548 return object_property_add(obj, name, "uint8", 2549 getter, setter, NULL, (void *)v); 2550 } 2551 2552 ObjectProperty * 2553 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2554 const uint8_t *v, 2555 ObjectPropertyFlags flags) 2556 { 2557 ObjectPropertyAccessor *getter = NULL; 2558 ObjectPropertyAccessor *setter = NULL; 2559 2560 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2561 getter = property_get_uint8_ptr; 2562 } 2563 2564 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2565 setter = property_set_uint8_ptr; 2566 } 2567 2568 return object_class_property_add(klass, name, "uint8", 2569 getter, setter, NULL, (void *)v); 2570 } 2571 2572 ObjectProperty * 2573 object_property_add_uint16_ptr(Object *obj, const char *name, 2574 const uint16_t *v, 2575 ObjectPropertyFlags flags) 2576 { 2577 ObjectPropertyAccessor *getter = NULL; 2578 ObjectPropertyAccessor *setter = NULL; 2579 2580 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2581 getter = property_get_uint16_ptr; 2582 } 2583 2584 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2585 setter = property_set_uint16_ptr; 2586 } 2587 2588 return object_property_add(obj, name, "uint16", 2589 getter, setter, NULL, (void *)v); 2590 } 2591 2592 ObjectProperty * 2593 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2594 const uint16_t *v, 2595 ObjectPropertyFlags flags) 2596 { 2597 ObjectPropertyAccessor *getter = NULL; 2598 ObjectPropertyAccessor *setter = NULL; 2599 2600 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2601 getter = property_get_uint16_ptr; 2602 } 2603 2604 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2605 setter = property_set_uint16_ptr; 2606 } 2607 2608 return object_class_property_add(klass, name, "uint16", 2609 getter, setter, NULL, (void *)v); 2610 } 2611 2612 ObjectProperty * 2613 object_property_add_uint32_ptr(Object *obj, const char *name, 2614 const uint32_t *v, 2615 ObjectPropertyFlags flags) 2616 { 2617 ObjectPropertyAccessor *getter = NULL; 2618 ObjectPropertyAccessor *setter = NULL; 2619 2620 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2621 getter = property_get_uint32_ptr; 2622 } 2623 2624 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2625 setter = property_set_uint32_ptr; 2626 } 2627 2628 return object_property_add(obj, name, "uint32", 2629 getter, setter, NULL, (void *)v); 2630 } 2631 2632 ObjectProperty * 2633 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2634 const uint32_t *v, 2635 ObjectPropertyFlags flags) 2636 { 2637 ObjectPropertyAccessor *getter = NULL; 2638 ObjectPropertyAccessor *setter = NULL; 2639 2640 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2641 getter = property_get_uint32_ptr; 2642 } 2643 2644 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2645 setter = property_set_uint32_ptr; 2646 } 2647 2648 return object_class_property_add(klass, name, "uint32", 2649 getter, setter, NULL, (void *)v); 2650 } 2651 2652 ObjectProperty * 2653 object_property_add_uint64_ptr(Object *obj, const char *name, 2654 const uint64_t *v, 2655 ObjectPropertyFlags flags) 2656 { 2657 ObjectPropertyAccessor *getter = NULL; 2658 ObjectPropertyAccessor *setter = NULL; 2659 2660 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2661 getter = property_get_uint64_ptr; 2662 } 2663 2664 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2665 setter = property_set_uint64_ptr; 2666 } 2667 2668 return object_property_add(obj, name, "uint64", 2669 getter, setter, NULL, (void *)v); 2670 } 2671 2672 ObjectProperty * 2673 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2674 const uint64_t *v, 2675 ObjectPropertyFlags flags) 2676 { 2677 ObjectPropertyAccessor *getter = NULL; 2678 ObjectPropertyAccessor *setter = NULL; 2679 2680 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2681 getter = property_get_uint64_ptr; 2682 } 2683 2684 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2685 setter = property_set_uint64_ptr; 2686 } 2687 2688 return object_class_property_add(klass, name, "uint64", 2689 getter, setter, NULL, (void *)v); 2690 } 2691 2692 typedef struct { 2693 Object *target_obj; 2694 char *target_name; 2695 } AliasProperty; 2696 2697 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2698 void *opaque, Error **errp) 2699 { 2700 AliasProperty *prop = opaque; 2701 2702 object_property_get(prop->target_obj, prop->target_name, v, errp); 2703 } 2704 2705 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2706 void *opaque, Error **errp) 2707 { 2708 AliasProperty *prop = opaque; 2709 2710 object_property_set(prop->target_obj, prop->target_name, v, errp); 2711 } 2712 2713 static Object *property_resolve_alias(Object *obj, void *opaque, 2714 const char *part) 2715 { 2716 AliasProperty *prop = opaque; 2717 2718 return object_resolve_path_component(prop->target_obj, prop->target_name); 2719 } 2720 2721 static void property_release_alias(Object *obj, const char *name, void *opaque) 2722 { 2723 AliasProperty *prop = opaque; 2724 2725 g_free(prop->target_name); 2726 g_free(prop); 2727 } 2728 2729 ObjectProperty * 2730 object_property_add_alias(Object *obj, const char *name, 2731 Object *target_obj, const char *target_name) 2732 { 2733 AliasProperty *prop; 2734 ObjectProperty *op; 2735 ObjectProperty *target_prop; 2736 g_autofree char *prop_type = NULL; 2737 2738 target_prop = object_property_find_err(target_obj, target_name, 2739 &error_abort); 2740 2741 if (object_property_is_child(target_prop)) { 2742 prop_type = g_strdup_printf("link%s", 2743 target_prop->type + strlen("child")); 2744 } else { 2745 prop_type = g_strdup(target_prop->type); 2746 } 2747 2748 prop = g_malloc(sizeof(*prop)); 2749 prop->target_obj = target_obj; 2750 prop->target_name = g_strdup(target_name); 2751 2752 op = object_property_add(obj, name, prop_type, 2753 property_get_alias, 2754 property_set_alias, 2755 property_release_alias, 2756 prop); 2757 op->resolve = property_resolve_alias; 2758 if (target_prop->defval) { 2759 op->defval = qobject_ref(target_prop->defval); 2760 } 2761 2762 object_property_set_description(obj, op->name, 2763 target_prop->description); 2764 return op; 2765 } 2766 2767 void object_property_set_description(Object *obj, const char *name, 2768 const char *description) 2769 { 2770 ObjectProperty *op; 2771 2772 op = object_property_find_err(obj, name, &error_abort); 2773 g_free(op->description); 2774 op->description = g_strdup(description); 2775 } 2776 2777 void object_class_property_set_description(ObjectClass *klass, 2778 const char *name, 2779 const char *description) 2780 { 2781 ObjectProperty *op; 2782 2783 op = g_hash_table_lookup(klass->properties, name); 2784 g_free(op->description); 2785 op->description = g_strdup(description); 2786 } 2787 2788 static void object_class_init(ObjectClass *klass, void *data) 2789 { 2790 object_class_property_add_str(klass, "type", object_get_type, 2791 NULL); 2792 } 2793 2794 static void register_types(void) 2795 { 2796 static TypeInfo interface_info = { 2797 .name = TYPE_INTERFACE, 2798 .class_size = sizeof(InterfaceClass), 2799 .abstract = true, 2800 }; 2801 2802 static TypeInfo object_info = { 2803 .name = TYPE_OBJECT, 2804 .instance_size = sizeof(Object), 2805 .class_init = object_class_init, 2806 .abstract = true, 2807 }; 2808 2809 type_interface = type_register_internal(&interface_info); 2810 type_register_internal(&object_info); 2811 } 2812 2813 type_init(register_types) 2814