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 = NULL; 1200 char *name_no_array = g_strdup(name); 1201 1202 name_no_array[name_len - 3] = '\0'; 1203 for (i = 0; i < INT16_MAX; ++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 assert(ret); 1215 return ret; 1216 } 1217 1218 if (object_property_find(obj, name) != NULL) { 1219 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1220 name, object_get_typename(obj)); 1221 return NULL; 1222 } 1223 1224 prop = g_malloc0(sizeof(*prop)); 1225 1226 prop->name = g_strdup(name); 1227 prop->type = g_strdup(type); 1228 1229 prop->get = get; 1230 prop->set = set; 1231 prop->release = release; 1232 prop->opaque = opaque; 1233 1234 g_hash_table_insert(obj->properties, prop->name, prop); 1235 return prop; 1236 } 1237 1238 ObjectProperty * 1239 object_property_add(Object *obj, const char *name, const char *type, 1240 ObjectPropertyAccessor *get, 1241 ObjectPropertyAccessor *set, 1242 ObjectPropertyRelease *release, 1243 void *opaque) 1244 { 1245 return object_property_try_add(obj, name, type, get, set, release, 1246 opaque, &error_abort); 1247 } 1248 1249 ObjectProperty * 1250 object_class_property_add(ObjectClass *klass, 1251 const char *name, 1252 const char *type, 1253 ObjectPropertyAccessor *get, 1254 ObjectPropertyAccessor *set, 1255 ObjectPropertyRelease *release, 1256 void *opaque) 1257 { 1258 ObjectProperty *prop; 1259 1260 assert(!object_class_property_find(klass, name)); 1261 1262 prop = g_malloc0(sizeof(*prop)); 1263 1264 prop->name = g_strdup(name); 1265 prop->type = g_strdup(type); 1266 1267 prop->get = get; 1268 prop->set = set; 1269 prop->release = release; 1270 prop->opaque = opaque; 1271 1272 g_hash_table_insert(klass->properties, prop->name, prop); 1273 1274 return prop; 1275 } 1276 1277 ObjectProperty *object_property_find(Object *obj, const char *name) 1278 { 1279 ObjectProperty *prop; 1280 ObjectClass *klass = object_get_class(obj); 1281 1282 prop = object_class_property_find(klass, name); 1283 if (prop) { 1284 return prop; 1285 } 1286 1287 return g_hash_table_lookup(obj->properties, name); 1288 } 1289 1290 ObjectProperty *object_property_find_err(Object *obj, const char *name, 1291 Error **errp) 1292 { 1293 ObjectProperty *prop = object_property_find(obj, name); 1294 if (!prop) { 1295 error_setg(errp, "Property '%s.%s' not found", 1296 object_get_typename(obj), name); 1297 } 1298 return prop; 1299 } 1300 1301 void object_property_iter_init(ObjectPropertyIterator *iter, 1302 Object *obj) 1303 { 1304 g_hash_table_iter_init(&iter->iter, obj->properties); 1305 iter->nextclass = object_get_class(obj); 1306 } 1307 1308 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1309 { 1310 gpointer key, val; 1311 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1312 if (!iter->nextclass) { 1313 return NULL; 1314 } 1315 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1316 iter->nextclass = object_class_get_parent(iter->nextclass); 1317 } 1318 return val; 1319 } 1320 1321 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1322 ObjectClass *klass) 1323 { 1324 g_hash_table_iter_init(&iter->iter, klass->properties); 1325 iter->nextclass = object_class_get_parent(klass); 1326 } 1327 1328 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name) 1329 { 1330 ObjectClass *parent_klass; 1331 1332 parent_klass = object_class_get_parent(klass); 1333 if (parent_klass) { 1334 ObjectProperty *prop = 1335 object_class_property_find(parent_klass, name); 1336 if (prop) { 1337 return prop; 1338 } 1339 } 1340 1341 return g_hash_table_lookup(klass->properties, name); 1342 } 1343 1344 ObjectProperty *object_class_property_find_err(ObjectClass *klass, 1345 const char *name, 1346 Error **errp) 1347 { 1348 ObjectProperty *prop = object_class_property_find(klass, name); 1349 if (!prop) { 1350 error_setg(errp, "Property '.%s' not found", name); 1351 } 1352 return prop; 1353 } 1354 1355 1356 void object_property_del(Object *obj, const char *name) 1357 { 1358 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1359 1360 if (prop->release) { 1361 prop->release(obj, name, prop->opaque); 1362 } 1363 g_hash_table_remove(obj->properties, name); 1364 } 1365 1366 bool object_property_get(Object *obj, const char *name, Visitor *v, 1367 Error **errp) 1368 { 1369 Error *err = NULL; 1370 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1371 1372 if (prop == NULL) { 1373 return false; 1374 } 1375 1376 if (!prop->get) { 1377 error_setg(errp, QERR_PERMISSION_DENIED); 1378 return false; 1379 } 1380 prop->get(obj, v, name, prop->opaque, &err); 1381 error_propagate(errp, err); 1382 return !err; 1383 } 1384 1385 bool object_property_set(Object *obj, const char *name, Visitor *v, 1386 Error **errp) 1387 { 1388 Error *err = NULL; 1389 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1390 1391 if (prop == NULL) { 1392 return false; 1393 } 1394 1395 if (!prop->set) { 1396 error_setg(errp, QERR_PERMISSION_DENIED); 1397 return false; 1398 } 1399 prop->set(obj, v, name, prop->opaque, &err); 1400 error_propagate(errp, err); 1401 return !err; 1402 } 1403 1404 bool object_property_set_str(Object *obj, const char *name, 1405 const char *value, Error **errp) 1406 { 1407 QString *qstr = qstring_from_str(value); 1408 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1409 1410 qobject_unref(qstr); 1411 return ok; 1412 } 1413 1414 char *object_property_get_str(Object *obj, const char *name, 1415 Error **errp) 1416 { 1417 QObject *ret = object_property_get_qobject(obj, name, errp); 1418 QString *qstring; 1419 char *retval; 1420 1421 if (!ret) { 1422 return NULL; 1423 } 1424 qstring = qobject_to(QString, ret); 1425 if (!qstring) { 1426 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1427 retval = NULL; 1428 } else { 1429 retval = g_strdup(qstring_get_str(qstring)); 1430 } 1431 1432 qobject_unref(ret); 1433 return retval; 1434 } 1435 1436 bool object_property_set_link(Object *obj, const char *name, 1437 Object *value, Error **errp) 1438 { 1439 g_autofree char *path = NULL; 1440 1441 if (value) { 1442 path = object_get_canonical_path(value); 1443 } 1444 return object_property_set_str(obj, name, path ?: "", errp); 1445 } 1446 1447 Object *object_property_get_link(Object *obj, const char *name, 1448 Error **errp) 1449 { 1450 char *str = object_property_get_str(obj, name, errp); 1451 Object *target = NULL; 1452 1453 if (str && *str) { 1454 target = object_resolve_path(str, NULL); 1455 if (!target) { 1456 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1457 "Device '%s' not found", str); 1458 } 1459 } 1460 1461 g_free(str); 1462 return target; 1463 } 1464 1465 bool object_property_set_bool(Object *obj, const char *name, 1466 bool value, Error **errp) 1467 { 1468 QBool *qbool = qbool_from_bool(value); 1469 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1470 1471 qobject_unref(qbool); 1472 return ok; 1473 } 1474 1475 bool object_property_get_bool(Object *obj, const char *name, 1476 Error **errp) 1477 { 1478 QObject *ret = object_property_get_qobject(obj, name, errp); 1479 QBool *qbool; 1480 bool retval; 1481 1482 if (!ret) { 1483 return false; 1484 } 1485 qbool = qobject_to(QBool, ret); 1486 if (!qbool) { 1487 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1488 retval = false; 1489 } else { 1490 retval = qbool_get_bool(qbool); 1491 } 1492 1493 qobject_unref(ret); 1494 return retval; 1495 } 1496 1497 bool object_property_set_int(Object *obj, const char *name, 1498 int64_t value, Error **errp) 1499 { 1500 QNum *qnum = qnum_from_int(value); 1501 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1502 1503 qobject_unref(qnum); 1504 return ok; 1505 } 1506 1507 int64_t object_property_get_int(Object *obj, const char *name, 1508 Error **errp) 1509 { 1510 QObject *ret = object_property_get_qobject(obj, name, errp); 1511 QNum *qnum; 1512 int64_t retval; 1513 1514 if (!ret) { 1515 return -1; 1516 } 1517 1518 qnum = qobject_to(QNum, ret); 1519 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1520 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1521 retval = -1; 1522 } 1523 1524 qobject_unref(ret); 1525 return retval; 1526 } 1527 1528 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1529 { 1530 Visitor *v = qobject_input_visitor_new(prop->defval); 1531 1532 assert(prop->set != NULL); 1533 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1534 1535 visit_free(v); 1536 } 1537 1538 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1539 { 1540 assert(!prop->defval); 1541 assert(!prop->init); 1542 1543 prop->defval = defval; 1544 prop->init = object_property_init_defval; 1545 } 1546 1547 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1548 { 1549 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1550 } 1551 1552 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1553 { 1554 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1555 } 1556 1557 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1558 { 1559 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1560 } 1561 1562 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1563 { 1564 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1565 } 1566 1567 bool object_property_set_uint(Object *obj, const char *name, 1568 uint64_t value, Error **errp) 1569 { 1570 QNum *qnum = qnum_from_uint(value); 1571 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1572 1573 qobject_unref(qnum); 1574 return ok; 1575 } 1576 1577 uint64_t object_property_get_uint(Object *obj, const char *name, 1578 Error **errp) 1579 { 1580 QObject *ret = object_property_get_qobject(obj, name, errp); 1581 QNum *qnum; 1582 uint64_t retval; 1583 1584 if (!ret) { 1585 return 0; 1586 } 1587 qnum = qobject_to(QNum, ret); 1588 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1589 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1590 retval = 0; 1591 } 1592 1593 qobject_unref(ret); 1594 return retval; 1595 } 1596 1597 typedef struct EnumProperty { 1598 const QEnumLookup *lookup; 1599 int (*get)(Object *, Error **); 1600 void (*set)(Object *, int, Error **); 1601 } EnumProperty; 1602 1603 int object_property_get_enum(Object *obj, const char *name, 1604 const char *typename, Error **errp) 1605 { 1606 char *str; 1607 int ret; 1608 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1609 EnumProperty *enumprop; 1610 1611 if (prop == NULL) { 1612 return -1; 1613 } 1614 1615 if (!g_str_equal(prop->type, typename)) { 1616 error_setg(errp, "Property %s on %s is not '%s' enum type", 1617 name, object_class_get_name( 1618 object_get_class(obj)), typename); 1619 return -1; 1620 } 1621 1622 enumprop = prop->opaque; 1623 1624 str = object_property_get_str(obj, name, errp); 1625 if (!str) { 1626 return -1; 1627 } 1628 1629 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1630 g_free(str); 1631 1632 return ret; 1633 } 1634 1635 bool object_property_parse(Object *obj, const char *name, 1636 const char *string, Error **errp) 1637 { 1638 Visitor *v = string_input_visitor_new(string); 1639 bool ok = object_property_set(obj, name, v, errp); 1640 1641 visit_free(v); 1642 return ok; 1643 } 1644 1645 char *object_property_print(Object *obj, const char *name, bool human, 1646 Error **errp) 1647 { 1648 Visitor *v; 1649 char *string = NULL; 1650 1651 v = string_output_visitor_new(human, &string); 1652 if (!object_property_get(obj, name, v, errp)) { 1653 goto out; 1654 } 1655 1656 visit_complete(v, &string); 1657 1658 out: 1659 visit_free(v); 1660 return string; 1661 } 1662 1663 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1664 { 1665 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1666 if (prop == NULL) { 1667 return NULL; 1668 } 1669 1670 return prop->type; 1671 } 1672 1673 Object *object_get_root(void) 1674 { 1675 static Object *root; 1676 1677 if (!root) { 1678 root = object_new("container"); 1679 } 1680 1681 return root; 1682 } 1683 1684 Object *object_get_objects_root(void) 1685 { 1686 return container_get(object_get_root(), "/objects"); 1687 } 1688 1689 Object *object_get_internal_root(void) 1690 { 1691 static Object *internal_root; 1692 1693 if (!internal_root) { 1694 internal_root = object_new("container"); 1695 } 1696 1697 return internal_root; 1698 } 1699 1700 static void object_get_child_property(Object *obj, Visitor *v, 1701 const char *name, void *opaque, 1702 Error **errp) 1703 { 1704 Object *child = opaque; 1705 char *path; 1706 1707 path = object_get_canonical_path(child); 1708 visit_type_str(v, name, &path, errp); 1709 g_free(path); 1710 } 1711 1712 static Object *object_resolve_child_property(Object *parent, void *opaque, 1713 const char *part) 1714 { 1715 return opaque; 1716 } 1717 1718 static void object_finalize_child_property(Object *obj, const char *name, 1719 void *opaque) 1720 { 1721 Object *child = opaque; 1722 1723 if (child->class->unparent) { 1724 (child->class->unparent)(child); 1725 } 1726 child->parent = NULL; 1727 object_unref(child); 1728 } 1729 1730 ObjectProperty * 1731 object_property_try_add_child(Object *obj, const char *name, 1732 Object *child, Error **errp) 1733 { 1734 g_autofree char *type = NULL; 1735 ObjectProperty *op; 1736 1737 assert(!child->parent); 1738 1739 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1740 1741 op = object_property_try_add(obj, name, type, object_get_child_property, 1742 NULL, object_finalize_child_property, 1743 child, errp); 1744 if (!op) { 1745 return NULL; 1746 } 1747 op->resolve = object_resolve_child_property; 1748 object_ref(child); 1749 child->parent = obj; 1750 return op; 1751 } 1752 1753 ObjectProperty * 1754 object_property_add_child(Object *obj, const char *name, 1755 Object *child) 1756 { 1757 return object_property_try_add_child(obj, name, child, &error_abort); 1758 } 1759 1760 void object_property_allow_set_link(const Object *obj, const char *name, 1761 Object *val, Error **errp) 1762 { 1763 /* Allow the link to be set, always */ 1764 } 1765 1766 typedef struct { 1767 union { 1768 Object **targetp; 1769 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1770 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1771 }; 1772 void (*check)(const Object *, const char *, Object *, Error **); 1773 ObjectPropertyLinkFlags flags; 1774 } LinkProperty; 1775 1776 static Object ** 1777 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1778 { 1779 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1780 return &lprop->target; 1781 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1782 return (void *)obj + lprop->offset; 1783 } else { 1784 return lprop->targetp; 1785 } 1786 } 1787 1788 static void object_get_link_property(Object *obj, Visitor *v, 1789 const char *name, void *opaque, 1790 Error **errp) 1791 { 1792 LinkProperty *lprop = opaque; 1793 Object **targetp = object_link_get_targetp(obj, lprop); 1794 char *path; 1795 1796 if (*targetp) { 1797 path = object_get_canonical_path(*targetp); 1798 visit_type_str(v, name, &path, errp); 1799 g_free(path); 1800 } else { 1801 path = (char *)""; 1802 visit_type_str(v, name, &path, errp); 1803 } 1804 } 1805 1806 /* 1807 * object_resolve_link: 1808 * 1809 * Lookup an object and ensure its type matches the link property type. This 1810 * is similar to object_resolve_path() except type verification against the 1811 * link property is performed. 1812 * 1813 * Returns: The matched object or NULL on path lookup failures. 1814 */ 1815 static Object *object_resolve_link(Object *obj, const char *name, 1816 const char *path, Error **errp) 1817 { 1818 const char *type; 1819 char *target_type; 1820 bool ambiguous = false; 1821 Object *target; 1822 1823 /* Go from link<FOO> to FOO. */ 1824 type = object_property_get_type(obj, name, NULL); 1825 target_type = g_strndup(&type[5], strlen(type) - 6); 1826 target = object_resolve_path_type(path, target_type, &ambiguous); 1827 1828 if (ambiguous) { 1829 error_setg(errp, "Path '%s' does not uniquely identify an object", 1830 path); 1831 } else if (!target) { 1832 target = object_resolve_path(path, &ambiguous); 1833 if (target || ambiguous) { 1834 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1835 } else { 1836 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1837 "Device '%s' not found", path); 1838 } 1839 target = NULL; 1840 } 1841 g_free(target_type); 1842 1843 return target; 1844 } 1845 1846 static void object_set_link_property(Object *obj, Visitor *v, 1847 const char *name, void *opaque, 1848 Error **errp) 1849 { 1850 Error *local_err = NULL; 1851 LinkProperty *prop = opaque; 1852 Object **targetp = object_link_get_targetp(obj, prop); 1853 Object *old_target = *targetp; 1854 Object *new_target; 1855 char *path = NULL; 1856 1857 if (!visit_type_str(v, name, &path, errp)) { 1858 return; 1859 } 1860 1861 if (*path) { 1862 new_target = object_resolve_link(obj, name, path, errp); 1863 if (!new_target) { 1864 g_free(path); 1865 return; 1866 } 1867 } else { 1868 new_target = NULL; 1869 } 1870 1871 g_free(path); 1872 1873 prop->check(obj, name, new_target, &local_err); 1874 if (local_err) { 1875 error_propagate(errp, local_err); 1876 return; 1877 } 1878 1879 *targetp = new_target; 1880 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1881 object_ref(new_target); 1882 object_unref(old_target); 1883 } 1884 } 1885 1886 static Object *object_resolve_link_property(Object *parent, void *opaque, 1887 const char *part) 1888 { 1889 LinkProperty *lprop = opaque; 1890 1891 return *object_link_get_targetp(parent, lprop); 1892 } 1893 1894 static void object_release_link_property(Object *obj, const char *name, 1895 void *opaque) 1896 { 1897 LinkProperty *prop = opaque; 1898 Object **targetp = object_link_get_targetp(obj, prop); 1899 1900 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1901 object_unref(*targetp); 1902 } 1903 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1904 g_free(prop); 1905 } 1906 } 1907 1908 static ObjectProperty * 1909 object_add_link_prop(Object *obj, const char *name, 1910 const char *type, void *ptr, 1911 void (*check)(const Object *, const char *, 1912 Object *, Error **), 1913 ObjectPropertyLinkFlags flags) 1914 { 1915 LinkProperty *prop = g_malloc(sizeof(*prop)); 1916 g_autofree char *full_type = NULL; 1917 ObjectProperty *op; 1918 1919 if (flags & OBJ_PROP_LINK_DIRECT) { 1920 prop->target = ptr; 1921 } else { 1922 prop->targetp = ptr; 1923 } 1924 prop->check = check; 1925 prop->flags = flags; 1926 1927 full_type = g_strdup_printf("link<%s>", type); 1928 1929 op = object_property_add(obj, name, full_type, 1930 object_get_link_property, 1931 check ? object_set_link_property : NULL, 1932 object_release_link_property, 1933 prop); 1934 op->resolve = object_resolve_link_property; 1935 return op; 1936 } 1937 1938 ObjectProperty * 1939 object_property_add_link(Object *obj, const char *name, 1940 const char *type, Object **targetp, 1941 void (*check)(const Object *, const char *, 1942 Object *, Error **), 1943 ObjectPropertyLinkFlags flags) 1944 { 1945 return object_add_link_prop(obj, name, type, targetp, check, flags); 1946 } 1947 1948 ObjectProperty * 1949 object_class_property_add_link(ObjectClass *oc, 1950 const char *name, 1951 const char *type, ptrdiff_t offset, 1952 void (*check)(const Object *obj, const char *name, 1953 Object *val, Error **errp), 1954 ObjectPropertyLinkFlags flags) 1955 { 1956 LinkProperty *prop = g_new0(LinkProperty, 1); 1957 char *full_type; 1958 ObjectProperty *op; 1959 1960 prop->offset = offset; 1961 prop->check = check; 1962 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1963 1964 full_type = g_strdup_printf("link<%s>", type); 1965 1966 op = object_class_property_add(oc, name, full_type, 1967 object_get_link_property, 1968 check ? object_set_link_property : NULL, 1969 object_release_link_property, 1970 prop); 1971 1972 op->resolve = object_resolve_link_property; 1973 1974 g_free(full_type); 1975 return op; 1976 } 1977 1978 ObjectProperty * 1979 object_property_add_const_link(Object *obj, const char *name, 1980 Object *target) 1981 { 1982 return object_add_link_prop(obj, name, 1983 object_get_typename(target), target, 1984 NULL, OBJ_PROP_LINK_DIRECT); 1985 } 1986 1987 const char *object_get_canonical_path_component(const Object *obj) 1988 { 1989 ObjectProperty *prop = NULL; 1990 GHashTableIter iter; 1991 1992 if (obj->parent == NULL) { 1993 return NULL; 1994 } 1995 1996 g_hash_table_iter_init(&iter, obj->parent->properties); 1997 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1998 if (!object_property_is_child(prop)) { 1999 continue; 2000 } 2001 2002 if (prop->opaque == obj) { 2003 return prop->name; 2004 } 2005 } 2006 2007 /* obj had a parent but was not a child, should never happen */ 2008 g_assert_not_reached(); 2009 return NULL; 2010 } 2011 2012 char *object_get_canonical_path(const Object *obj) 2013 { 2014 Object *root = object_get_root(); 2015 char *newpath, *path = NULL; 2016 2017 if (obj == root) { 2018 return g_strdup("/"); 2019 } 2020 2021 do { 2022 const char *component = object_get_canonical_path_component(obj); 2023 2024 if (!component) { 2025 /* A canonical path must be complete, so discard what was 2026 * collected so far. 2027 */ 2028 g_free(path); 2029 return NULL; 2030 } 2031 2032 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 2033 g_free(path); 2034 path = newpath; 2035 obj = obj->parent; 2036 } while (obj != root); 2037 2038 return path; 2039 } 2040 2041 Object *object_resolve_path_component(Object *parent, const char *part) 2042 { 2043 ObjectProperty *prop = object_property_find(parent, part); 2044 if (prop == NULL) { 2045 return NULL; 2046 } 2047 2048 if (prop->resolve) { 2049 return prop->resolve(parent, prop->opaque, part); 2050 } else { 2051 return NULL; 2052 } 2053 } 2054 2055 static Object *object_resolve_abs_path(Object *parent, 2056 char **parts, 2057 const char *typename) 2058 { 2059 Object *child; 2060 2061 if (*parts == NULL) { 2062 return object_dynamic_cast(parent, typename); 2063 } 2064 2065 if (strcmp(*parts, "") == 0) { 2066 return object_resolve_abs_path(parent, parts + 1, typename); 2067 } 2068 2069 child = object_resolve_path_component(parent, *parts); 2070 if (!child) { 2071 return NULL; 2072 } 2073 2074 return object_resolve_abs_path(child, parts + 1, typename); 2075 } 2076 2077 static Object *object_resolve_partial_path(Object *parent, 2078 char **parts, 2079 const char *typename, 2080 bool *ambiguous) 2081 { 2082 Object *obj; 2083 GHashTableIter iter; 2084 ObjectProperty *prop; 2085 2086 obj = object_resolve_abs_path(parent, parts, typename); 2087 2088 g_hash_table_iter_init(&iter, parent->properties); 2089 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2090 Object *found; 2091 2092 if (!object_property_is_child(prop)) { 2093 continue; 2094 } 2095 2096 found = object_resolve_partial_path(prop->opaque, parts, 2097 typename, ambiguous); 2098 if (found) { 2099 if (obj) { 2100 *ambiguous = true; 2101 return NULL; 2102 } 2103 obj = found; 2104 } 2105 2106 if (*ambiguous) { 2107 return NULL; 2108 } 2109 } 2110 2111 return obj; 2112 } 2113 2114 Object *object_resolve_path_type(const char *path, const char *typename, 2115 bool *ambiguousp) 2116 { 2117 Object *obj; 2118 char **parts; 2119 2120 parts = g_strsplit(path, "/", 0); 2121 assert(parts); 2122 2123 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2124 bool ambiguous = false; 2125 obj = object_resolve_partial_path(object_get_root(), parts, 2126 typename, &ambiguous); 2127 if (ambiguousp) { 2128 *ambiguousp = ambiguous; 2129 } 2130 } else { 2131 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2132 } 2133 2134 g_strfreev(parts); 2135 2136 return obj; 2137 } 2138 2139 Object *object_resolve_path(const char *path, bool *ambiguous) 2140 { 2141 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2142 } 2143 2144 typedef struct StringProperty 2145 { 2146 char *(*get)(Object *, Error **); 2147 void (*set)(Object *, const char *, Error **); 2148 } StringProperty; 2149 2150 static void property_get_str(Object *obj, Visitor *v, const char *name, 2151 void *opaque, Error **errp) 2152 { 2153 StringProperty *prop = opaque; 2154 char *value; 2155 Error *err = NULL; 2156 2157 value = prop->get(obj, &err); 2158 if (err) { 2159 error_propagate(errp, err); 2160 return; 2161 } 2162 2163 visit_type_str(v, name, &value, errp); 2164 g_free(value); 2165 } 2166 2167 static void property_set_str(Object *obj, Visitor *v, const char *name, 2168 void *opaque, Error **errp) 2169 { 2170 StringProperty *prop = opaque; 2171 char *value; 2172 2173 if (!visit_type_str(v, name, &value, errp)) { 2174 return; 2175 } 2176 2177 prop->set(obj, value, errp); 2178 g_free(value); 2179 } 2180 2181 static void property_release_data(Object *obj, const char *name, 2182 void *opaque) 2183 { 2184 g_free(opaque); 2185 } 2186 2187 ObjectProperty * 2188 object_property_add_str(Object *obj, const char *name, 2189 char *(*get)(Object *, Error **), 2190 void (*set)(Object *, const char *, Error **)) 2191 { 2192 StringProperty *prop = g_malloc0(sizeof(*prop)); 2193 2194 prop->get = get; 2195 prop->set = set; 2196 2197 return object_property_add(obj, name, "string", 2198 get ? property_get_str : NULL, 2199 set ? property_set_str : NULL, 2200 property_release_data, 2201 prop); 2202 } 2203 2204 ObjectProperty * 2205 object_class_property_add_str(ObjectClass *klass, const char *name, 2206 char *(*get)(Object *, Error **), 2207 void (*set)(Object *, const char *, 2208 Error **)) 2209 { 2210 StringProperty *prop = g_malloc0(sizeof(*prop)); 2211 2212 prop->get = get; 2213 prop->set = set; 2214 2215 return object_class_property_add(klass, name, "string", 2216 get ? property_get_str : NULL, 2217 set ? property_set_str : NULL, 2218 NULL, 2219 prop); 2220 } 2221 2222 typedef struct BoolProperty 2223 { 2224 bool (*get)(Object *, Error **); 2225 void (*set)(Object *, bool, Error **); 2226 } BoolProperty; 2227 2228 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2229 void *opaque, Error **errp) 2230 { 2231 BoolProperty *prop = opaque; 2232 bool value; 2233 Error *err = NULL; 2234 2235 value = prop->get(obj, &err); 2236 if (err) { 2237 error_propagate(errp, err); 2238 return; 2239 } 2240 2241 visit_type_bool(v, name, &value, errp); 2242 } 2243 2244 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2245 void *opaque, Error **errp) 2246 { 2247 BoolProperty *prop = opaque; 2248 bool value; 2249 2250 if (!visit_type_bool(v, name, &value, errp)) { 2251 return; 2252 } 2253 2254 prop->set(obj, value, errp); 2255 } 2256 2257 ObjectProperty * 2258 object_property_add_bool(Object *obj, const char *name, 2259 bool (*get)(Object *, Error **), 2260 void (*set)(Object *, bool, Error **)) 2261 { 2262 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2263 2264 prop->get = get; 2265 prop->set = set; 2266 2267 return object_property_add(obj, name, "bool", 2268 get ? property_get_bool : NULL, 2269 set ? property_set_bool : NULL, 2270 property_release_data, 2271 prop); 2272 } 2273 2274 ObjectProperty * 2275 object_class_property_add_bool(ObjectClass *klass, const char *name, 2276 bool (*get)(Object *, Error **), 2277 void (*set)(Object *, bool, Error **)) 2278 { 2279 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2280 2281 prop->get = get; 2282 prop->set = set; 2283 2284 return object_class_property_add(klass, name, "bool", 2285 get ? property_get_bool : NULL, 2286 set ? property_set_bool : NULL, 2287 NULL, 2288 prop); 2289 } 2290 2291 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2292 void *opaque, Error **errp) 2293 { 2294 EnumProperty *prop = opaque; 2295 int value; 2296 Error *err = NULL; 2297 2298 value = prop->get(obj, &err); 2299 if (err) { 2300 error_propagate(errp, err); 2301 return; 2302 } 2303 2304 visit_type_enum(v, name, &value, prop->lookup, errp); 2305 } 2306 2307 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2308 void *opaque, Error **errp) 2309 { 2310 EnumProperty *prop = opaque; 2311 int value; 2312 2313 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2314 return; 2315 } 2316 prop->set(obj, value, errp); 2317 } 2318 2319 ObjectProperty * 2320 object_property_add_enum(Object *obj, const char *name, 2321 const char *typename, 2322 const QEnumLookup *lookup, 2323 int (*get)(Object *, Error **), 2324 void (*set)(Object *, int, Error **)) 2325 { 2326 EnumProperty *prop = g_malloc(sizeof(*prop)); 2327 2328 prop->lookup = lookup; 2329 prop->get = get; 2330 prop->set = set; 2331 2332 return object_property_add(obj, name, typename, 2333 get ? property_get_enum : NULL, 2334 set ? property_set_enum : NULL, 2335 property_release_data, 2336 prop); 2337 } 2338 2339 ObjectProperty * 2340 object_class_property_add_enum(ObjectClass *klass, const char *name, 2341 const char *typename, 2342 const QEnumLookup *lookup, 2343 int (*get)(Object *, Error **), 2344 void (*set)(Object *, int, Error **)) 2345 { 2346 EnumProperty *prop = g_malloc(sizeof(*prop)); 2347 2348 prop->lookup = lookup; 2349 prop->get = get; 2350 prop->set = set; 2351 2352 return object_class_property_add(klass, name, typename, 2353 get ? property_get_enum : NULL, 2354 set ? property_set_enum : NULL, 2355 NULL, 2356 prop); 2357 } 2358 2359 typedef struct TMProperty { 2360 void (*get)(Object *, struct tm *, Error **); 2361 } TMProperty; 2362 2363 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2364 void *opaque, Error **errp) 2365 { 2366 TMProperty *prop = opaque; 2367 Error *err = NULL; 2368 struct tm value; 2369 2370 prop->get(obj, &value, &err); 2371 if (err) { 2372 error_propagate(errp, err); 2373 return; 2374 } 2375 2376 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2377 return; 2378 } 2379 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2380 goto out_end; 2381 } 2382 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2383 goto out_end; 2384 } 2385 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2386 goto out_end; 2387 } 2388 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2389 goto out_end; 2390 } 2391 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2392 goto out_end; 2393 } 2394 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2395 goto out_end; 2396 } 2397 visit_check_struct(v, errp); 2398 out_end: 2399 visit_end_struct(v, NULL); 2400 } 2401 2402 ObjectProperty * 2403 object_property_add_tm(Object *obj, const char *name, 2404 void (*get)(Object *, struct tm *, Error **)) 2405 { 2406 TMProperty *prop = g_malloc0(sizeof(*prop)); 2407 2408 prop->get = get; 2409 2410 return object_property_add(obj, name, "struct tm", 2411 get ? property_get_tm : NULL, NULL, 2412 property_release_data, 2413 prop); 2414 } 2415 2416 ObjectProperty * 2417 object_class_property_add_tm(ObjectClass *klass, const char *name, 2418 void (*get)(Object *, struct tm *, Error **)) 2419 { 2420 TMProperty *prop = g_malloc0(sizeof(*prop)); 2421 2422 prop->get = get; 2423 2424 return object_class_property_add(klass, name, "struct tm", 2425 get ? property_get_tm : NULL, 2426 NULL, NULL, prop); 2427 } 2428 2429 static char *object_get_type(Object *obj, Error **errp) 2430 { 2431 return g_strdup(object_get_typename(obj)); 2432 } 2433 2434 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2435 void *opaque, Error **errp) 2436 { 2437 uint8_t value = *(uint8_t *)opaque; 2438 visit_type_uint8(v, name, &value, errp); 2439 } 2440 2441 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2442 void *opaque, Error **errp) 2443 { 2444 uint8_t *field = opaque; 2445 uint8_t value; 2446 2447 if (!visit_type_uint8(v, name, &value, errp)) { 2448 return; 2449 } 2450 2451 *field = value; 2452 } 2453 2454 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2455 void *opaque, Error **errp) 2456 { 2457 uint16_t value = *(uint16_t *)opaque; 2458 visit_type_uint16(v, name, &value, errp); 2459 } 2460 2461 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2462 void *opaque, Error **errp) 2463 { 2464 uint16_t *field = opaque; 2465 uint16_t value; 2466 2467 if (!visit_type_uint16(v, name, &value, errp)) { 2468 return; 2469 } 2470 2471 *field = value; 2472 } 2473 2474 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2475 void *opaque, Error **errp) 2476 { 2477 uint32_t value = *(uint32_t *)opaque; 2478 visit_type_uint32(v, name, &value, errp); 2479 } 2480 2481 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2482 void *opaque, Error **errp) 2483 { 2484 uint32_t *field = opaque; 2485 uint32_t value; 2486 2487 if (!visit_type_uint32(v, name, &value, errp)) { 2488 return; 2489 } 2490 2491 *field = value; 2492 } 2493 2494 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2495 void *opaque, Error **errp) 2496 { 2497 uint64_t value = *(uint64_t *)opaque; 2498 visit_type_uint64(v, name, &value, errp); 2499 } 2500 2501 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2502 void *opaque, Error **errp) 2503 { 2504 uint64_t *field = opaque; 2505 uint64_t value; 2506 2507 if (!visit_type_uint64(v, name, &value, errp)) { 2508 return; 2509 } 2510 2511 *field = value; 2512 } 2513 2514 ObjectProperty * 2515 object_property_add_uint8_ptr(Object *obj, const char *name, 2516 const uint8_t *v, 2517 ObjectPropertyFlags flags) 2518 { 2519 ObjectPropertyAccessor *getter = NULL; 2520 ObjectPropertyAccessor *setter = NULL; 2521 2522 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2523 getter = property_get_uint8_ptr; 2524 } 2525 2526 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2527 setter = property_set_uint8_ptr; 2528 } 2529 2530 return object_property_add(obj, name, "uint8", 2531 getter, setter, NULL, (void *)v); 2532 } 2533 2534 ObjectProperty * 2535 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2536 const uint8_t *v, 2537 ObjectPropertyFlags flags) 2538 { 2539 ObjectPropertyAccessor *getter = NULL; 2540 ObjectPropertyAccessor *setter = NULL; 2541 2542 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2543 getter = property_get_uint8_ptr; 2544 } 2545 2546 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2547 setter = property_set_uint8_ptr; 2548 } 2549 2550 return object_class_property_add(klass, name, "uint8", 2551 getter, setter, NULL, (void *)v); 2552 } 2553 2554 ObjectProperty * 2555 object_property_add_uint16_ptr(Object *obj, const char *name, 2556 const uint16_t *v, 2557 ObjectPropertyFlags flags) 2558 { 2559 ObjectPropertyAccessor *getter = NULL; 2560 ObjectPropertyAccessor *setter = NULL; 2561 2562 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2563 getter = property_get_uint16_ptr; 2564 } 2565 2566 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2567 setter = property_set_uint16_ptr; 2568 } 2569 2570 return object_property_add(obj, name, "uint16", 2571 getter, setter, NULL, (void *)v); 2572 } 2573 2574 ObjectProperty * 2575 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2576 const uint16_t *v, 2577 ObjectPropertyFlags flags) 2578 { 2579 ObjectPropertyAccessor *getter = NULL; 2580 ObjectPropertyAccessor *setter = NULL; 2581 2582 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2583 getter = property_get_uint16_ptr; 2584 } 2585 2586 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2587 setter = property_set_uint16_ptr; 2588 } 2589 2590 return object_class_property_add(klass, name, "uint16", 2591 getter, setter, NULL, (void *)v); 2592 } 2593 2594 ObjectProperty * 2595 object_property_add_uint32_ptr(Object *obj, const char *name, 2596 const uint32_t *v, 2597 ObjectPropertyFlags flags) 2598 { 2599 ObjectPropertyAccessor *getter = NULL; 2600 ObjectPropertyAccessor *setter = NULL; 2601 2602 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2603 getter = property_get_uint32_ptr; 2604 } 2605 2606 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2607 setter = property_set_uint32_ptr; 2608 } 2609 2610 return object_property_add(obj, name, "uint32", 2611 getter, setter, NULL, (void *)v); 2612 } 2613 2614 ObjectProperty * 2615 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2616 const uint32_t *v, 2617 ObjectPropertyFlags flags) 2618 { 2619 ObjectPropertyAccessor *getter = NULL; 2620 ObjectPropertyAccessor *setter = NULL; 2621 2622 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2623 getter = property_get_uint32_ptr; 2624 } 2625 2626 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2627 setter = property_set_uint32_ptr; 2628 } 2629 2630 return object_class_property_add(klass, name, "uint32", 2631 getter, setter, NULL, (void *)v); 2632 } 2633 2634 ObjectProperty * 2635 object_property_add_uint64_ptr(Object *obj, const char *name, 2636 const uint64_t *v, 2637 ObjectPropertyFlags flags) 2638 { 2639 ObjectPropertyAccessor *getter = NULL; 2640 ObjectPropertyAccessor *setter = NULL; 2641 2642 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2643 getter = property_get_uint64_ptr; 2644 } 2645 2646 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2647 setter = property_set_uint64_ptr; 2648 } 2649 2650 return object_property_add(obj, name, "uint64", 2651 getter, setter, NULL, (void *)v); 2652 } 2653 2654 ObjectProperty * 2655 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2656 const uint64_t *v, 2657 ObjectPropertyFlags flags) 2658 { 2659 ObjectPropertyAccessor *getter = NULL; 2660 ObjectPropertyAccessor *setter = NULL; 2661 2662 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2663 getter = property_get_uint64_ptr; 2664 } 2665 2666 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2667 setter = property_set_uint64_ptr; 2668 } 2669 2670 return object_class_property_add(klass, name, "uint64", 2671 getter, setter, NULL, (void *)v); 2672 } 2673 2674 typedef struct { 2675 Object *target_obj; 2676 char *target_name; 2677 } AliasProperty; 2678 2679 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2680 void *opaque, Error **errp) 2681 { 2682 AliasProperty *prop = opaque; 2683 2684 object_property_get(prop->target_obj, prop->target_name, v, errp); 2685 } 2686 2687 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2688 void *opaque, Error **errp) 2689 { 2690 AliasProperty *prop = opaque; 2691 2692 object_property_set(prop->target_obj, prop->target_name, v, errp); 2693 } 2694 2695 static Object *property_resolve_alias(Object *obj, void *opaque, 2696 const char *part) 2697 { 2698 AliasProperty *prop = opaque; 2699 2700 return object_resolve_path_component(prop->target_obj, prop->target_name); 2701 } 2702 2703 static void property_release_alias(Object *obj, const char *name, void *opaque) 2704 { 2705 AliasProperty *prop = opaque; 2706 2707 g_free(prop->target_name); 2708 g_free(prop); 2709 } 2710 2711 ObjectProperty * 2712 object_property_add_alias(Object *obj, const char *name, 2713 Object *target_obj, const char *target_name) 2714 { 2715 AliasProperty *prop; 2716 ObjectProperty *op; 2717 ObjectProperty *target_prop; 2718 g_autofree char *prop_type = NULL; 2719 2720 target_prop = object_property_find_err(target_obj, target_name, 2721 &error_abort); 2722 2723 if (object_property_is_child(target_prop)) { 2724 prop_type = g_strdup_printf("link%s", 2725 target_prop->type + strlen("child")); 2726 } else { 2727 prop_type = g_strdup(target_prop->type); 2728 } 2729 2730 prop = g_malloc(sizeof(*prop)); 2731 prop->target_obj = target_obj; 2732 prop->target_name = g_strdup(target_name); 2733 2734 op = object_property_add(obj, name, prop_type, 2735 property_get_alias, 2736 property_set_alias, 2737 property_release_alias, 2738 prop); 2739 op->resolve = property_resolve_alias; 2740 if (target_prop->defval) { 2741 op->defval = qobject_ref(target_prop->defval); 2742 } 2743 2744 object_property_set_description(obj, op->name, 2745 target_prop->description); 2746 return op; 2747 } 2748 2749 void object_property_set_description(Object *obj, const char *name, 2750 const char *description) 2751 { 2752 ObjectProperty *op; 2753 2754 op = object_property_find_err(obj, name, &error_abort); 2755 g_free(op->description); 2756 op->description = g_strdup(description); 2757 } 2758 2759 void object_class_property_set_description(ObjectClass *klass, 2760 const char *name, 2761 const char *description) 2762 { 2763 ObjectProperty *op; 2764 2765 op = g_hash_table_lookup(klass->properties, name); 2766 g_free(op->description); 2767 op->description = g_strdup(description); 2768 } 2769 2770 static void object_class_init(ObjectClass *klass, void *data) 2771 { 2772 object_class_property_add_str(klass, "type", object_get_type, 2773 NULL); 2774 } 2775 2776 static void register_types(void) 2777 { 2778 static TypeInfo interface_info = { 2779 .name = TYPE_INTERFACE, 2780 .class_size = sizeof(InterfaceClass), 2781 .abstract = true, 2782 }; 2783 2784 static TypeInfo object_info = { 2785 .name = TYPE_OBJECT, 2786 .instance_size = sizeof(Object), 2787 .class_init = object_class_init, 2788 .abstract = true, 2789 }; 2790 2791 type_interface = type_register_internal(&interface_info); 2792 type_register_internal(&object_info); 2793 } 2794 2795 type_init(register_types) 2796