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' not found", name); 1295 } 1296 return prop; 1297 } 1298 1299 void object_property_iter_init(ObjectPropertyIterator *iter, 1300 Object *obj) 1301 { 1302 g_hash_table_iter_init(&iter->iter, obj->properties); 1303 iter->nextclass = object_get_class(obj); 1304 } 1305 1306 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1307 { 1308 gpointer key, val; 1309 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1310 if (!iter->nextclass) { 1311 return NULL; 1312 } 1313 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1314 iter->nextclass = object_class_get_parent(iter->nextclass); 1315 } 1316 return val; 1317 } 1318 1319 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1320 ObjectClass *klass) 1321 { 1322 g_hash_table_iter_init(&iter->iter, klass->properties); 1323 iter->nextclass = object_class_get_parent(klass); 1324 } 1325 1326 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name) 1327 { 1328 ObjectClass *parent_klass; 1329 1330 parent_klass = object_class_get_parent(klass); 1331 if (parent_klass) { 1332 ObjectProperty *prop = 1333 object_class_property_find(parent_klass, name); 1334 if (prop) { 1335 return prop; 1336 } 1337 } 1338 1339 return g_hash_table_lookup(klass->properties, name); 1340 } 1341 1342 ObjectProperty *object_class_property_find_err(ObjectClass *klass, 1343 const char *name, 1344 Error **errp) 1345 { 1346 ObjectProperty *prop = object_class_property_find(klass, name); 1347 if (!prop) { 1348 error_setg(errp, "Property '.%s' not found", name); 1349 } 1350 return prop; 1351 } 1352 1353 1354 void object_property_del(Object *obj, const char *name) 1355 { 1356 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1357 1358 if (prop->release) { 1359 prop->release(obj, name, prop->opaque); 1360 } 1361 g_hash_table_remove(obj->properties, name); 1362 } 1363 1364 bool object_property_get(Object *obj, const char *name, Visitor *v, 1365 Error **errp) 1366 { 1367 Error *err = NULL; 1368 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1369 1370 if (prop == NULL) { 1371 return false; 1372 } 1373 1374 if (!prop->get) { 1375 error_setg(errp, QERR_PERMISSION_DENIED); 1376 return false; 1377 } 1378 prop->get(obj, v, name, prop->opaque, &err); 1379 error_propagate(errp, err); 1380 return !err; 1381 } 1382 1383 bool object_property_set(Object *obj, const char *name, Visitor *v, 1384 Error **errp) 1385 { 1386 Error *err = NULL; 1387 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1388 1389 if (prop == NULL) { 1390 return false; 1391 } 1392 1393 if (!prop->set) { 1394 error_setg(errp, QERR_PERMISSION_DENIED); 1395 return false; 1396 } 1397 prop->set(obj, v, name, prop->opaque, &err); 1398 error_propagate(errp, err); 1399 return !err; 1400 } 1401 1402 bool object_property_set_str(Object *obj, const char *name, 1403 const char *value, Error **errp) 1404 { 1405 QString *qstr = qstring_from_str(value); 1406 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1407 1408 qobject_unref(qstr); 1409 return ok; 1410 } 1411 1412 char *object_property_get_str(Object *obj, const char *name, 1413 Error **errp) 1414 { 1415 QObject *ret = object_property_get_qobject(obj, name, errp); 1416 char *retval; 1417 1418 if (!ret) { 1419 return NULL; 1420 } 1421 1422 retval = g_strdup(qobject_get_try_str(ret)); 1423 if (!retval) { 1424 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1425 } 1426 1427 qobject_unref(ret); 1428 return retval; 1429 } 1430 1431 bool object_property_set_link(Object *obj, const char *name, 1432 Object *value, Error **errp) 1433 { 1434 g_autofree char *path = NULL; 1435 1436 if (value) { 1437 path = object_get_canonical_path(value); 1438 } 1439 return object_property_set_str(obj, name, path ?: "", errp); 1440 } 1441 1442 Object *object_property_get_link(Object *obj, const char *name, 1443 Error **errp) 1444 { 1445 char *str = object_property_get_str(obj, name, errp); 1446 Object *target = NULL; 1447 1448 if (str && *str) { 1449 target = object_resolve_path(str, NULL); 1450 if (!target) { 1451 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1452 "Device '%s' not found", str); 1453 } 1454 } 1455 1456 g_free(str); 1457 return target; 1458 } 1459 1460 bool object_property_set_bool(Object *obj, const char *name, 1461 bool value, Error **errp) 1462 { 1463 QBool *qbool = qbool_from_bool(value); 1464 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1465 1466 qobject_unref(qbool); 1467 return ok; 1468 } 1469 1470 bool object_property_get_bool(Object *obj, const char *name, 1471 Error **errp) 1472 { 1473 QObject *ret = object_property_get_qobject(obj, name, errp); 1474 QBool *qbool; 1475 bool retval; 1476 1477 if (!ret) { 1478 return false; 1479 } 1480 qbool = qobject_to(QBool, ret); 1481 if (!qbool) { 1482 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1483 retval = false; 1484 } else { 1485 retval = qbool_get_bool(qbool); 1486 } 1487 1488 qobject_unref(ret); 1489 return retval; 1490 } 1491 1492 bool object_property_set_int(Object *obj, const char *name, 1493 int64_t value, Error **errp) 1494 { 1495 QNum *qnum = qnum_from_int(value); 1496 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1497 1498 qobject_unref(qnum); 1499 return ok; 1500 } 1501 1502 int64_t object_property_get_int(Object *obj, const char *name, 1503 Error **errp) 1504 { 1505 QObject *ret = object_property_get_qobject(obj, name, errp); 1506 QNum *qnum; 1507 int64_t retval; 1508 1509 if (!ret) { 1510 return -1; 1511 } 1512 1513 qnum = qobject_to(QNum, ret); 1514 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1515 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1516 retval = -1; 1517 } 1518 1519 qobject_unref(ret); 1520 return retval; 1521 } 1522 1523 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1524 { 1525 Visitor *v = qobject_input_visitor_new(prop->defval); 1526 1527 assert(prop->set != NULL); 1528 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1529 1530 visit_free(v); 1531 } 1532 1533 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1534 { 1535 assert(!prop->defval); 1536 assert(!prop->init); 1537 1538 prop->defval = defval; 1539 prop->init = object_property_init_defval; 1540 } 1541 1542 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1543 { 1544 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1545 } 1546 1547 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1548 { 1549 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1550 } 1551 1552 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1553 { 1554 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1555 } 1556 1557 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1558 { 1559 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1560 } 1561 1562 bool object_property_set_uint(Object *obj, const char *name, 1563 uint64_t value, Error **errp) 1564 { 1565 QNum *qnum = qnum_from_uint(value); 1566 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1567 1568 qobject_unref(qnum); 1569 return ok; 1570 } 1571 1572 uint64_t object_property_get_uint(Object *obj, const char *name, 1573 Error **errp) 1574 { 1575 QObject *ret = object_property_get_qobject(obj, name, errp); 1576 QNum *qnum; 1577 uint64_t retval; 1578 1579 if (!ret) { 1580 return 0; 1581 } 1582 qnum = qobject_to(QNum, ret); 1583 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1584 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1585 retval = 0; 1586 } 1587 1588 qobject_unref(ret); 1589 return retval; 1590 } 1591 1592 typedef struct EnumProperty { 1593 const QEnumLookup *lookup; 1594 int (*get)(Object *, Error **); 1595 void (*set)(Object *, int, Error **); 1596 } EnumProperty; 1597 1598 int object_property_get_enum(Object *obj, const char *name, 1599 const char *typename, Error **errp) 1600 { 1601 char *str; 1602 int ret; 1603 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1604 EnumProperty *enumprop; 1605 1606 if (prop == NULL) { 1607 return -1; 1608 } 1609 1610 if (!g_str_equal(prop->type, typename)) { 1611 error_setg(errp, "Property %s on %s is not '%s' enum type", 1612 name, object_class_get_name( 1613 object_get_class(obj)), typename); 1614 return -1; 1615 } 1616 1617 enumprop = prop->opaque; 1618 1619 str = object_property_get_str(obj, name, errp); 1620 if (!str) { 1621 return -1; 1622 } 1623 1624 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1625 g_free(str); 1626 1627 return ret; 1628 } 1629 1630 bool object_property_parse(Object *obj, const char *name, 1631 const char *string, Error **errp) 1632 { 1633 Visitor *v = string_input_visitor_new(string); 1634 bool ok = object_property_set(obj, name, v, errp); 1635 1636 visit_free(v); 1637 return ok; 1638 } 1639 1640 char *object_property_print(Object *obj, const char *name, bool human, 1641 Error **errp) 1642 { 1643 Visitor *v; 1644 char *string = NULL; 1645 1646 v = string_output_visitor_new(human, &string); 1647 if (!object_property_get(obj, name, v, errp)) { 1648 goto out; 1649 } 1650 1651 visit_complete(v, &string); 1652 1653 out: 1654 visit_free(v); 1655 return string; 1656 } 1657 1658 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1659 { 1660 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1661 if (prop == NULL) { 1662 return NULL; 1663 } 1664 1665 return prop->type; 1666 } 1667 1668 Object *object_get_root(void) 1669 { 1670 static Object *root; 1671 1672 if (!root) { 1673 root = object_new("container"); 1674 } 1675 1676 return root; 1677 } 1678 1679 Object *object_get_objects_root(void) 1680 { 1681 return container_get(object_get_root(), "/objects"); 1682 } 1683 1684 Object *object_get_internal_root(void) 1685 { 1686 static Object *internal_root; 1687 1688 if (!internal_root) { 1689 internal_root = object_new("container"); 1690 } 1691 1692 return internal_root; 1693 } 1694 1695 static void object_get_child_property(Object *obj, Visitor *v, 1696 const char *name, void *opaque, 1697 Error **errp) 1698 { 1699 Object *child = opaque; 1700 char *path; 1701 1702 path = object_get_canonical_path(child); 1703 visit_type_str(v, name, &path, errp); 1704 g_free(path); 1705 } 1706 1707 static Object *object_resolve_child_property(Object *parent, void *opaque, 1708 const char *part) 1709 { 1710 return opaque; 1711 } 1712 1713 static void object_finalize_child_property(Object *obj, const char *name, 1714 void *opaque) 1715 { 1716 Object *child = opaque; 1717 1718 if (child->class->unparent) { 1719 (child->class->unparent)(child); 1720 } 1721 child->parent = NULL; 1722 object_unref(child); 1723 } 1724 1725 ObjectProperty * 1726 object_property_try_add_child(Object *obj, const char *name, 1727 Object *child, Error **errp) 1728 { 1729 g_autofree char *type = NULL; 1730 ObjectProperty *op; 1731 1732 assert(!child->parent); 1733 1734 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1735 1736 op = object_property_try_add(obj, name, type, object_get_child_property, 1737 NULL, object_finalize_child_property, 1738 child, errp); 1739 if (!op) { 1740 return NULL; 1741 } 1742 op->resolve = object_resolve_child_property; 1743 object_ref(child); 1744 child->parent = obj; 1745 return op; 1746 } 1747 1748 ObjectProperty * 1749 object_property_add_child(Object *obj, const char *name, 1750 Object *child) 1751 { 1752 return object_property_try_add_child(obj, name, child, &error_abort); 1753 } 1754 1755 void object_property_allow_set_link(const Object *obj, const char *name, 1756 Object *val, Error **errp) 1757 { 1758 /* Allow the link to be set, always */ 1759 } 1760 1761 typedef struct { 1762 union { 1763 Object **targetp; 1764 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1765 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1766 }; 1767 void (*check)(const Object *, const char *, Object *, Error **); 1768 ObjectPropertyLinkFlags flags; 1769 } LinkProperty; 1770 1771 static Object ** 1772 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1773 { 1774 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1775 return &lprop->target; 1776 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1777 return (void *)obj + lprop->offset; 1778 } else { 1779 return lprop->targetp; 1780 } 1781 } 1782 1783 static void object_get_link_property(Object *obj, Visitor *v, 1784 const char *name, void *opaque, 1785 Error **errp) 1786 { 1787 LinkProperty *lprop = opaque; 1788 Object **targetp = object_link_get_targetp(obj, lprop); 1789 char *path; 1790 1791 if (*targetp) { 1792 path = object_get_canonical_path(*targetp); 1793 visit_type_str(v, name, &path, errp); 1794 g_free(path); 1795 } else { 1796 path = (char *)""; 1797 visit_type_str(v, name, &path, errp); 1798 } 1799 } 1800 1801 /* 1802 * object_resolve_link: 1803 * 1804 * Lookup an object and ensure its type matches the link property type. This 1805 * is similar to object_resolve_path() except type verification against the 1806 * link property is performed. 1807 * 1808 * Returns: The matched object or NULL on path lookup failures. 1809 */ 1810 static Object *object_resolve_link(Object *obj, const char *name, 1811 const char *path, Error **errp) 1812 { 1813 const char *type; 1814 char *target_type; 1815 bool ambiguous = false; 1816 Object *target; 1817 1818 /* Go from link<FOO> to FOO. */ 1819 type = object_property_get_type(obj, name, NULL); 1820 target_type = g_strndup(&type[5], strlen(type) - 6); 1821 target = object_resolve_path_type(path, target_type, &ambiguous); 1822 1823 if (ambiguous) { 1824 error_setg(errp, "Path '%s' does not uniquely identify an object", 1825 path); 1826 } else if (!target) { 1827 target = object_resolve_path(path, &ambiguous); 1828 if (target || ambiguous) { 1829 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1830 } else { 1831 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1832 "Device '%s' not found", path); 1833 } 1834 target = NULL; 1835 } 1836 g_free(target_type); 1837 1838 return target; 1839 } 1840 1841 static void object_set_link_property(Object *obj, Visitor *v, 1842 const char *name, void *opaque, 1843 Error **errp) 1844 { 1845 Error *local_err = NULL; 1846 LinkProperty *prop = opaque; 1847 Object **targetp = object_link_get_targetp(obj, prop); 1848 Object *old_target = *targetp; 1849 Object *new_target; 1850 char *path = NULL; 1851 1852 if (!visit_type_str(v, name, &path, errp)) { 1853 return; 1854 } 1855 1856 if (*path) { 1857 new_target = object_resolve_link(obj, name, path, errp); 1858 if (!new_target) { 1859 g_free(path); 1860 return; 1861 } 1862 } else { 1863 new_target = NULL; 1864 } 1865 1866 g_free(path); 1867 1868 prop->check(obj, name, new_target, &local_err); 1869 if (local_err) { 1870 error_propagate(errp, local_err); 1871 return; 1872 } 1873 1874 *targetp = new_target; 1875 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1876 object_ref(new_target); 1877 object_unref(old_target); 1878 } 1879 } 1880 1881 static Object *object_resolve_link_property(Object *parent, void *opaque, 1882 const char *part) 1883 { 1884 LinkProperty *lprop = opaque; 1885 1886 return *object_link_get_targetp(parent, lprop); 1887 } 1888 1889 static void object_release_link_property(Object *obj, const char *name, 1890 void *opaque) 1891 { 1892 LinkProperty *prop = opaque; 1893 Object **targetp = object_link_get_targetp(obj, prop); 1894 1895 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1896 object_unref(*targetp); 1897 } 1898 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1899 g_free(prop); 1900 } 1901 } 1902 1903 static ObjectProperty * 1904 object_add_link_prop(Object *obj, const char *name, 1905 const char *type, void *ptr, 1906 void (*check)(const Object *, const char *, 1907 Object *, Error **), 1908 ObjectPropertyLinkFlags flags) 1909 { 1910 LinkProperty *prop = g_malloc(sizeof(*prop)); 1911 g_autofree char *full_type = NULL; 1912 ObjectProperty *op; 1913 1914 if (flags & OBJ_PROP_LINK_DIRECT) { 1915 prop->target = ptr; 1916 } else { 1917 prop->targetp = ptr; 1918 } 1919 prop->check = check; 1920 prop->flags = flags; 1921 1922 full_type = g_strdup_printf("link<%s>", type); 1923 1924 op = object_property_add(obj, name, full_type, 1925 object_get_link_property, 1926 check ? object_set_link_property : NULL, 1927 object_release_link_property, 1928 prop); 1929 op->resolve = object_resolve_link_property; 1930 return op; 1931 } 1932 1933 ObjectProperty * 1934 object_property_add_link(Object *obj, const char *name, 1935 const char *type, Object **targetp, 1936 void (*check)(const Object *, const char *, 1937 Object *, Error **), 1938 ObjectPropertyLinkFlags flags) 1939 { 1940 return object_add_link_prop(obj, name, type, targetp, check, flags); 1941 } 1942 1943 ObjectProperty * 1944 object_class_property_add_link(ObjectClass *oc, 1945 const char *name, 1946 const char *type, ptrdiff_t offset, 1947 void (*check)(const Object *obj, const char *name, 1948 Object *val, Error **errp), 1949 ObjectPropertyLinkFlags flags) 1950 { 1951 LinkProperty *prop = g_new0(LinkProperty, 1); 1952 char *full_type; 1953 ObjectProperty *op; 1954 1955 prop->offset = offset; 1956 prop->check = check; 1957 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1958 1959 full_type = g_strdup_printf("link<%s>", type); 1960 1961 op = object_class_property_add(oc, name, full_type, 1962 object_get_link_property, 1963 check ? object_set_link_property : NULL, 1964 object_release_link_property, 1965 prop); 1966 1967 op->resolve = object_resolve_link_property; 1968 1969 g_free(full_type); 1970 return op; 1971 } 1972 1973 ObjectProperty * 1974 object_property_add_const_link(Object *obj, const char *name, 1975 Object *target) 1976 { 1977 return object_add_link_prop(obj, name, 1978 object_get_typename(target), target, 1979 NULL, OBJ_PROP_LINK_DIRECT); 1980 } 1981 1982 const char *object_get_canonical_path_component(const Object *obj) 1983 { 1984 ObjectProperty *prop = NULL; 1985 GHashTableIter iter; 1986 1987 if (obj->parent == NULL) { 1988 return NULL; 1989 } 1990 1991 g_hash_table_iter_init(&iter, obj->parent->properties); 1992 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1993 if (!object_property_is_child(prop)) { 1994 continue; 1995 } 1996 1997 if (prop->opaque == obj) { 1998 return prop->name; 1999 } 2000 } 2001 2002 /* obj had a parent but was not a child, should never happen */ 2003 g_assert_not_reached(); 2004 return NULL; 2005 } 2006 2007 char *object_get_canonical_path(const Object *obj) 2008 { 2009 Object *root = object_get_root(); 2010 char *newpath, *path = NULL; 2011 2012 if (obj == root) { 2013 return g_strdup("/"); 2014 } 2015 2016 do { 2017 const char *component = object_get_canonical_path_component(obj); 2018 2019 if (!component) { 2020 /* A canonical path must be complete, so discard what was 2021 * collected so far. 2022 */ 2023 g_free(path); 2024 return NULL; 2025 } 2026 2027 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 2028 g_free(path); 2029 path = newpath; 2030 obj = obj->parent; 2031 } while (obj != root); 2032 2033 return path; 2034 } 2035 2036 Object *object_resolve_path_component(Object *parent, const char *part) 2037 { 2038 ObjectProperty *prop = object_property_find(parent, part); 2039 if (prop == NULL) { 2040 return NULL; 2041 } 2042 2043 if (prop->resolve) { 2044 return prop->resolve(parent, prop->opaque, part); 2045 } else { 2046 return NULL; 2047 } 2048 } 2049 2050 static Object *object_resolve_abs_path(Object *parent, 2051 char **parts, 2052 const char *typename) 2053 { 2054 Object *child; 2055 2056 if (*parts == NULL) { 2057 return object_dynamic_cast(parent, typename); 2058 } 2059 2060 if (strcmp(*parts, "") == 0) { 2061 return object_resolve_abs_path(parent, parts + 1, typename); 2062 } 2063 2064 child = object_resolve_path_component(parent, *parts); 2065 if (!child) { 2066 return NULL; 2067 } 2068 2069 return object_resolve_abs_path(child, parts + 1, typename); 2070 } 2071 2072 static Object *object_resolve_partial_path(Object *parent, 2073 char **parts, 2074 const char *typename, 2075 bool *ambiguous) 2076 { 2077 Object *obj; 2078 GHashTableIter iter; 2079 ObjectProperty *prop; 2080 2081 obj = object_resolve_abs_path(parent, parts, typename); 2082 2083 g_hash_table_iter_init(&iter, parent->properties); 2084 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2085 Object *found; 2086 2087 if (!object_property_is_child(prop)) { 2088 continue; 2089 } 2090 2091 found = object_resolve_partial_path(prop->opaque, parts, 2092 typename, ambiguous); 2093 if (found) { 2094 if (obj) { 2095 *ambiguous = true; 2096 return NULL; 2097 } 2098 obj = found; 2099 } 2100 2101 if (*ambiguous) { 2102 return NULL; 2103 } 2104 } 2105 2106 return obj; 2107 } 2108 2109 Object *object_resolve_path_type(const char *path, const char *typename, 2110 bool *ambiguousp) 2111 { 2112 Object *obj; 2113 char **parts; 2114 2115 parts = g_strsplit(path, "/", 0); 2116 assert(parts); 2117 2118 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2119 bool ambiguous = false; 2120 obj = object_resolve_partial_path(object_get_root(), parts, 2121 typename, &ambiguous); 2122 if (ambiguousp) { 2123 *ambiguousp = ambiguous; 2124 } 2125 } else { 2126 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2127 } 2128 2129 g_strfreev(parts); 2130 2131 return obj; 2132 } 2133 2134 Object *object_resolve_path(const char *path, bool *ambiguous) 2135 { 2136 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2137 } 2138 2139 typedef struct StringProperty 2140 { 2141 char *(*get)(Object *, Error **); 2142 void (*set)(Object *, const char *, Error **); 2143 } StringProperty; 2144 2145 static void property_get_str(Object *obj, Visitor *v, const char *name, 2146 void *opaque, Error **errp) 2147 { 2148 StringProperty *prop = opaque; 2149 char *value; 2150 Error *err = NULL; 2151 2152 value = prop->get(obj, &err); 2153 if (err) { 2154 error_propagate(errp, err); 2155 return; 2156 } 2157 2158 visit_type_str(v, name, &value, errp); 2159 g_free(value); 2160 } 2161 2162 static void property_set_str(Object *obj, Visitor *v, const char *name, 2163 void *opaque, Error **errp) 2164 { 2165 StringProperty *prop = opaque; 2166 char *value; 2167 2168 if (!visit_type_str(v, name, &value, errp)) { 2169 return; 2170 } 2171 2172 prop->set(obj, value, errp); 2173 g_free(value); 2174 } 2175 2176 static void property_release_str(Object *obj, const char *name, 2177 void *opaque) 2178 { 2179 StringProperty *prop = opaque; 2180 g_free(prop); 2181 } 2182 2183 ObjectProperty * 2184 object_property_add_str(Object *obj, const char *name, 2185 char *(*get)(Object *, Error **), 2186 void (*set)(Object *, const char *, Error **)) 2187 { 2188 StringProperty *prop = g_malloc0(sizeof(*prop)); 2189 2190 prop->get = get; 2191 prop->set = set; 2192 2193 return object_property_add(obj, name, "string", 2194 get ? property_get_str : NULL, 2195 set ? property_set_str : NULL, 2196 property_release_str, 2197 prop); 2198 } 2199 2200 ObjectProperty * 2201 object_class_property_add_str(ObjectClass *klass, const char *name, 2202 char *(*get)(Object *, Error **), 2203 void (*set)(Object *, const char *, 2204 Error **)) 2205 { 2206 StringProperty *prop = g_malloc0(sizeof(*prop)); 2207 2208 prop->get = get; 2209 prop->set = set; 2210 2211 return object_class_property_add(klass, name, "string", 2212 get ? property_get_str : NULL, 2213 set ? property_set_str : NULL, 2214 NULL, 2215 prop); 2216 } 2217 2218 typedef struct BoolProperty 2219 { 2220 bool (*get)(Object *, Error **); 2221 void (*set)(Object *, bool, Error **); 2222 } BoolProperty; 2223 2224 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2225 void *opaque, Error **errp) 2226 { 2227 BoolProperty *prop = opaque; 2228 bool value; 2229 Error *err = NULL; 2230 2231 value = prop->get(obj, &err); 2232 if (err) { 2233 error_propagate(errp, err); 2234 return; 2235 } 2236 2237 visit_type_bool(v, name, &value, errp); 2238 } 2239 2240 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2241 void *opaque, Error **errp) 2242 { 2243 BoolProperty *prop = opaque; 2244 bool value; 2245 2246 if (!visit_type_bool(v, name, &value, errp)) { 2247 return; 2248 } 2249 2250 prop->set(obj, value, errp); 2251 } 2252 2253 static void property_release_bool(Object *obj, const char *name, 2254 void *opaque) 2255 { 2256 BoolProperty *prop = opaque; 2257 g_free(prop); 2258 } 2259 2260 ObjectProperty * 2261 object_property_add_bool(Object *obj, const char *name, 2262 bool (*get)(Object *, Error **), 2263 void (*set)(Object *, bool, Error **)) 2264 { 2265 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2266 2267 prop->get = get; 2268 prop->set = set; 2269 2270 return object_property_add(obj, name, "bool", 2271 get ? property_get_bool : NULL, 2272 set ? property_set_bool : NULL, 2273 property_release_bool, 2274 prop); 2275 } 2276 2277 ObjectProperty * 2278 object_class_property_add_bool(ObjectClass *klass, const char *name, 2279 bool (*get)(Object *, Error **), 2280 void (*set)(Object *, bool, Error **)) 2281 { 2282 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2283 2284 prop->get = get; 2285 prop->set = set; 2286 2287 return object_class_property_add(klass, name, "bool", 2288 get ? property_get_bool : NULL, 2289 set ? property_set_bool : NULL, 2290 NULL, 2291 prop); 2292 } 2293 2294 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2295 void *opaque, Error **errp) 2296 { 2297 EnumProperty *prop = opaque; 2298 int value; 2299 Error *err = NULL; 2300 2301 value = prop->get(obj, &err); 2302 if (err) { 2303 error_propagate(errp, err); 2304 return; 2305 } 2306 2307 visit_type_enum(v, name, &value, prop->lookup, errp); 2308 } 2309 2310 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2311 void *opaque, Error **errp) 2312 { 2313 EnumProperty *prop = opaque; 2314 int value; 2315 2316 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2317 return; 2318 } 2319 prop->set(obj, value, errp); 2320 } 2321 2322 static void property_release_enum(Object *obj, const char *name, 2323 void *opaque) 2324 { 2325 EnumProperty *prop = opaque; 2326 g_free(prop); 2327 } 2328 2329 ObjectProperty * 2330 object_property_add_enum(Object *obj, const char *name, 2331 const char *typename, 2332 const QEnumLookup *lookup, 2333 int (*get)(Object *, Error **), 2334 void (*set)(Object *, int, Error **)) 2335 { 2336 EnumProperty *prop = g_malloc(sizeof(*prop)); 2337 2338 prop->lookup = lookup; 2339 prop->get = get; 2340 prop->set = set; 2341 2342 return object_property_add(obj, name, typename, 2343 get ? property_get_enum : NULL, 2344 set ? property_set_enum : NULL, 2345 property_release_enum, 2346 prop); 2347 } 2348 2349 ObjectProperty * 2350 object_class_property_add_enum(ObjectClass *klass, const char *name, 2351 const char *typename, 2352 const QEnumLookup *lookup, 2353 int (*get)(Object *, Error **), 2354 void (*set)(Object *, int, Error **)) 2355 { 2356 EnumProperty *prop = g_malloc(sizeof(*prop)); 2357 2358 prop->lookup = lookup; 2359 prop->get = get; 2360 prop->set = set; 2361 2362 return object_class_property_add(klass, name, typename, 2363 get ? property_get_enum : NULL, 2364 set ? property_set_enum : NULL, 2365 NULL, 2366 prop); 2367 } 2368 2369 typedef struct TMProperty { 2370 void (*get)(Object *, struct tm *, Error **); 2371 } TMProperty; 2372 2373 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2374 void *opaque, Error **errp) 2375 { 2376 TMProperty *prop = opaque; 2377 Error *err = NULL; 2378 struct tm value; 2379 2380 prop->get(obj, &value, &err); 2381 if (err) { 2382 error_propagate(errp, err); 2383 return; 2384 } 2385 2386 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2387 return; 2388 } 2389 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2390 goto out_end; 2391 } 2392 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2393 goto out_end; 2394 } 2395 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2396 goto out_end; 2397 } 2398 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2399 goto out_end; 2400 } 2401 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2402 goto out_end; 2403 } 2404 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2405 goto out_end; 2406 } 2407 visit_check_struct(v, errp); 2408 out_end: 2409 visit_end_struct(v, NULL); 2410 } 2411 2412 static void property_release_tm(Object *obj, const char *name, 2413 void *opaque) 2414 { 2415 TMProperty *prop = opaque; 2416 g_free(prop); 2417 } 2418 2419 ObjectProperty * 2420 object_property_add_tm(Object *obj, const char *name, 2421 void (*get)(Object *, struct tm *, Error **)) 2422 { 2423 TMProperty *prop = g_malloc0(sizeof(*prop)); 2424 2425 prop->get = get; 2426 2427 return object_property_add(obj, name, "struct tm", 2428 get ? property_get_tm : NULL, NULL, 2429 property_release_tm, 2430 prop); 2431 } 2432 2433 ObjectProperty * 2434 object_class_property_add_tm(ObjectClass *klass, const char *name, 2435 void (*get)(Object *, struct tm *, Error **)) 2436 { 2437 TMProperty *prop = g_malloc0(sizeof(*prop)); 2438 2439 prop->get = get; 2440 2441 return object_class_property_add(klass, name, "struct tm", 2442 get ? property_get_tm : NULL, 2443 NULL, NULL, prop); 2444 } 2445 2446 static char *object_get_type(Object *obj, Error **errp) 2447 { 2448 return g_strdup(object_get_typename(obj)); 2449 } 2450 2451 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2452 void *opaque, Error **errp) 2453 { 2454 uint8_t value = *(uint8_t *)opaque; 2455 visit_type_uint8(v, name, &value, errp); 2456 } 2457 2458 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2459 void *opaque, Error **errp) 2460 { 2461 uint8_t *field = opaque; 2462 uint8_t value; 2463 2464 if (!visit_type_uint8(v, name, &value, errp)) { 2465 return; 2466 } 2467 2468 *field = value; 2469 } 2470 2471 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2472 void *opaque, Error **errp) 2473 { 2474 uint16_t value = *(uint16_t *)opaque; 2475 visit_type_uint16(v, name, &value, errp); 2476 } 2477 2478 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2479 void *opaque, Error **errp) 2480 { 2481 uint16_t *field = opaque; 2482 uint16_t value; 2483 2484 if (!visit_type_uint16(v, name, &value, errp)) { 2485 return; 2486 } 2487 2488 *field = value; 2489 } 2490 2491 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2492 void *opaque, Error **errp) 2493 { 2494 uint32_t value = *(uint32_t *)opaque; 2495 visit_type_uint32(v, name, &value, errp); 2496 } 2497 2498 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2499 void *opaque, Error **errp) 2500 { 2501 uint32_t *field = opaque; 2502 uint32_t value; 2503 2504 if (!visit_type_uint32(v, name, &value, errp)) { 2505 return; 2506 } 2507 2508 *field = value; 2509 } 2510 2511 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2512 void *opaque, Error **errp) 2513 { 2514 uint64_t value = *(uint64_t *)opaque; 2515 visit_type_uint64(v, name, &value, errp); 2516 } 2517 2518 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2519 void *opaque, Error **errp) 2520 { 2521 uint64_t *field = opaque; 2522 uint64_t value; 2523 2524 if (!visit_type_uint64(v, name, &value, errp)) { 2525 return; 2526 } 2527 2528 *field = value; 2529 } 2530 2531 ObjectProperty * 2532 object_property_add_uint8_ptr(Object *obj, const char *name, 2533 const uint8_t *v, 2534 ObjectPropertyFlags flags) 2535 { 2536 ObjectPropertyAccessor *getter = NULL; 2537 ObjectPropertyAccessor *setter = NULL; 2538 2539 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2540 getter = property_get_uint8_ptr; 2541 } 2542 2543 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2544 setter = property_set_uint8_ptr; 2545 } 2546 2547 return object_property_add(obj, name, "uint8", 2548 getter, setter, NULL, (void *)v); 2549 } 2550 2551 ObjectProperty * 2552 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2553 const uint8_t *v, 2554 ObjectPropertyFlags flags) 2555 { 2556 ObjectPropertyAccessor *getter = NULL; 2557 ObjectPropertyAccessor *setter = NULL; 2558 2559 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2560 getter = property_get_uint8_ptr; 2561 } 2562 2563 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2564 setter = property_set_uint8_ptr; 2565 } 2566 2567 return object_class_property_add(klass, name, "uint8", 2568 getter, setter, NULL, (void *)v); 2569 } 2570 2571 ObjectProperty * 2572 object_property_add_uint16_ptr(Object *obj, const char *name, 2573 const uint16_t *v, 2574 ObjectPropertyFlags flags) 2575 { 2576 ObjectPropertyAccessor *getter = NULL; 2577 ObjectPropertyAccessor *setter = NULL; 2578 2579 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2580 getter = property_get_uint16_ptr; 2581 } 2582 2583 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2584 setter = property_set_uint16_ptr; 2585 } 2586 2587 return object_property_add(obj, name, "uint16", 2588 getter, setter, NULL, (void *)v); 2589 } 2590 2591 ObjectProperty * 2592 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2593 const uint16_t *v, 2594 ObjectPropertyFlags flags) 2595 { 2596 ObjectPropertyAccessor *getter = NULL; 2597 ObjectPropertyAccessor *setter = NULL; 2598 2599 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2600 getter = property_get_uint16_ptr; 2601 } 2602 2603 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2604 setter = property_set_uint16_ptr; 2605 } 2606 2607 return object_class_property_add(klass, name, "uint16", 2608 getter, setter, NULL, (void *)v); 2609 } 2610 2611 ObjectProperty * 2612 object_property_add_uint32_ptr(Object *obj, const char *name, 2613 const uint32_t *v, 2614 ObjectPropertyFlags flags) 2615 { 2616 ObjectPropertyAccessor *getter = NULL; 2617 ObjectPropertyAccessor *setter = NULL; 2618 2619 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2620 getter = property_get_uint32_ptr; 2621 } 2622 2623 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2624 setter = property_set_uint32_ptr; 2625 } 2626 2627 return object_property_add(obj, name, "uint32", 2628 getter, setter, NULL, (void *)v); 2629 } 2630 2631 ObjectProperty * 2632 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2633 const uint32_t *v, 2634 ObjectPropertyFlags flags) 2635 { 2636 ObjectPropertyAccessor *getter = NULL; 2637 ObjectPropertyAccessor *setter = NULL; 2638 2639 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2640 getter = property_get_uint32_ptr; 2641 } 2642 2643 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2644 setter = property_set_uint32_ptr; 2645 } 2646 2647 return object_class_property_add(klass, name, "uint32", 2648 getter, setter, NULL, (void *)v); 2649 } 2650 2651 ObjectProperty * 2652 object_property_add_uint64_ptr(Object *obj, const char *name, 2653 const uint64_t *v, 2654 ObjectPropertyFlags flags) 2655 { 2656 ObjectPropertyAccessor *getter = NULL; 2657 ObjectPropertyAccessor *setter = NULL; 2658 2659 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2660 getter = property_get_uint64_ptr; 2661 } 2662 2663 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2664 setter = property_set_uint64_ptr; 2665 } 2666 2667 return object_property_add(obj, name, "uint64", 2668 getter, setter, NULL, (void *)v); 2669 } 2670 2671 ObjectProperty * 2672 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2673 const uint64_t *v, 2674 ObjectPropertyFlags flags) 2675 { 2676 ObjectPropertyAccessor *getter = NULL; 2677 ObjectPropertyAccessor *setter = NULL; 2678 2679 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2680 getter = property_get_uint64_ptr; 2681 } 2682 2683 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2684 setter = property_set_uint64_ptr; 2685 } 2686 2687 return object_class_property_add(klass, name, "uint64", 2688 getter, setter, NULL, (void *)v); 2689 } 2690 2691 typedef struct { 2692 Object *target_obj; 2693 char *target_name; 2694 } AliasProperty; 2695 2696 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2697 void *opaque, Error **errp) 2698 { 2699 AliasProperty *prop = opaque; 2700 2701 object_property_get(prop->target_obj, prop->target_name, v, errp); 2702 } 2703 2704 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2705 void *opaque, Error **errp) 2706 { 2707 AliasProperty *prop = opaque; 2708 2709 object_property_set(prop->target_obj, prop->target_name, v, errp); 2710 } 2711 2712 static Object *property_resolve_alias(Object *obj, void *opaque, 2713 const char *part) 2714 { 2715 AliasProperty *prop = opaque; 2716 2717 return object_resolve_path_component(prop->target_obj, prop->target_name); 2718 } 2719 2720 static void property_release_alias(Object *obj, const char *name, void *opaque) 2721 { 2722 AliasProperty *prop = opaque; 2723 2724 g_free(prop->target_name); 2725 g_free(prop); 2726 } 2727 2728 ObjectProperty * 2729 object_property_add_alias(Object *obj, const char *name, 2730 Object *target_obj, const char *target_name) 2731 { 2732 AliasProperty *prop; 2733 ObjectProperty *op; 2734 ObjectProperty *target_prop; 2735 g_autofree char *prop_type = NULL; 2736 2737 target_prop = object_property_find_err(target_obj, target_name, 2738 &error_abort); 2739 2740 if (object_property_is_child(target_prop)) { 2741 prop_type = g_strdup_printf("link%s", 2742 target_prop->type + strlen("child")); 2743 } else { 2744 prop_type = g_strdup(target_prop->type); 2745 } 2746 2747 prop = g_malloc(sizeof(*prop)); 2748 prop->target_obj = target_obj; 2749 prop->target_name = g_strdup(target_name); 2750 2751 op = object_property_add(obj, name, prop_type, 2752 property_get_alias, 2753 property_set_alias, 2754 property_release_alias, 2755 prop); 2756 op->resolve = property_resolve_alias; 2757 if (target_prop->defval) { 2758 op->defval = qobject_ref(target_prop->defval); 2759 } 2760 2761 object_property_set_description(obj, op->name, 2762 target_prop->description); 2763 return op; 2764 } 2765 2766 void object_property_set_description(Object *obj, const char *name, 2767 const char *description) 2768 { 2769 ObjectProperty *op; 2770 2771 op = object_property_find_err(obj, name, &error_abort); 2772 g_free(op->description); 2773 op->description = g_strdup(description); 2774 } 2775 2776 void object_class_property_set_description(ObjectClass *klass, 2777 const char *name, 2778 const char *description) 2779 { 2780 ObjectProperty *op; 2781 2782 op = g_hash_table_lookup(klass->properties, name); 2783 g_free(op->description); 2784 op->description = g_strdup(description); 2785 } 2786 2787 static void object_class_init(ObjectClass *klass, void *data) 2788 { 2789 object_class_property_add_str(klass, "type", object_get_type, 2790 NULL); 2791 } 2792 2793 static void register_types(void) 2794 { 2795 static TypeInfo interface_info = { 2796 .name = TYPE_INTERFACE, 2797 .class_size = sizeof(InterfaceClass), 2798 .abstract = true, 2799 }; 2800 2801 static TypeInfo object_info = { 2802 .name = TYPE_OBJECT, 2803 .instance_size = sizeof(Object), 2804 .class_init = object_class_init, 2805 .abstract = true, 2806 }; 2807 2808 type_interface = type_register_internal(&interface_info); 2809 type_register_internal(&object_info); 2810 } 2811 2812 type_init(register_types) 2813