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 "qemu/memalign.h" 20 #include "qapi/visitor.h" 21 #include "qapi/string-input-visitor.h" 22 #include "qapi/string-output-visitor.h" 23 #include "qapi/qobject-input-visitor.h" 24 #include "qapi/forward-visitor.h" 25 #include "qapi/qapi-builtin-visit.h" 26 #include "qapi/qmp/qerror.h" 27 #include "qapi/qmp/qjson.h" 28 #include "trace.h" 29 30 /* TODO: replace QObject with a simpler visitor to avoid a dependency 31 * of the QOM core on QObject? */ 32 #include "qom/qom-qobject.h" 33 #include "qapi/qmp/qbool.h" 34 #include "qapi/qmp/qnum.h" 35 #include "qapi/qmp/qstring.h" 36 #include "qemu/error-report.h" 37 38 #define MAX_INTERFACES 32 39 40 typedef struct InterfaceImpl InterfaceImpl; 41 typedef struct TypeImpl TypeImpl; 42 43 struct InterfaceImpl 44 { 45 const char *typename; 46 }; 47 48 struct TypeImpl 49 { 50 const char *name; 51 52 size_t class_size; 53 54 size_t instance_size; 55 size_t instance_align; 56 57 void (*class_init)(ObjectClass *klass, void *data); 58 void (*class_base_init)(ObjectClass *klass, void *data); 59 60 void *class_data; 61 62 void (*instance_init)(Object *obj); 63 void (*instance_post_init)(Object *obj); 64 void (*instance_finalize)(Object *obj); 65 66 bool abstract; 67 68 const char *parent; 69 TypeImpl *parent_type; 70 71 ObjectClass *class; 72 73 int num_interfaces; 74 InterfaceImpl interfaces[MAX_INTERFACES]; 75 }; 76 77 static Type type_interface; 78 79 static GHashTable *type_table_get(void) 80 { 81 static GHashTable *type_table; 82 83 if (type_table == NULL) { 84 type_table = g_hash_table_new(g_str_hash, g_str_equal); 85 } 86 87 return type_table; 88 } 89 90 static bool enumerating_types; 91 92 static void type_table_add(TypeImpl *ti) 93 { 94 assert(!enumerating_types); 95 g_hash_table_insert(type_table_get(), (void *)ti->name, ti); 96 } 97 98 static TypeImpl *type_table_lookup(const char *name) 99 { 100 return g_hash_table_lookup(type_table_get(), name); 101 } 102 103 static TypeImpl *type_new(const TypeInfo *info) 104 { 105 TypeImpl *ti = g_malloc0(sizeof(*ti)); 106 int i; 107 108 g_assert(info->name != NULL); 109 110 if (type_table_lookup(info->name) != NULL) { 111 fprintf(stderr, "Registering `%s' which already exists\n", info->name); 112 abort(); 113 } 114 115 ti->name = g_strdup(info->name); 116 ti->parent = g_strdup(info->parent); 117 118 ti->class_size = info->class_size; 119 ti->instance_size = info->instance_size; 120 ti->instance_align = info->instance_align; 121 122 ti->class_init = info->class_init; 123 ti->class_base_init = info->class_base_init; 124 ti->class_data = info->class_data; 125 126 ti->instance_init = info->instance_init; 127 ti->instance_post_init = info->instance_post_init; 128 ti->instance_finalize = info->instance_finalize; 129 130 ti->abstract = info->abstract; 131 132 for (i = 0; info->interfaces && info->interfaces[i].type; i++) { 133 ti->interfaces[i].typename = g_strdup(info->interfaces[i].type); 134 } 135 ti->num_interfaces = i; 136 137 return ti; 138 } 139 140 static TypeImpl *type_register_internal(const TypeInfo *info) 141 { 142 TypeImpl *ti; 143 ti = type_new(info); 144 145 type_table_add(ti); 146 return ti; 147 } 148 149 TypeImpl *type_register(const TypeInfo *info) 150 { 151 assert(info->parent); 152 return type_register_internal(info); 153 } 154 155 TypeImpl *type_register_static(const TypeInfo *info) 156 { 157 return type_register(info); 158 } 159 160 void type_register_static_array(const TypeInfo *infos, int nr_infos) 161 { 162 int i; 163 164 for (i = 0; i < nr_infos; i++) { 165 type_register_static(&infos[i]); 166 } 167 } 168 169 static TypeImpl *type_get_by_name(const char *name) 170 { 171 if (name == NULL) { 172 return NULL; 173 } 174 175 return type_table_lookup(name); 176 } 177 178 static TypeImpl *type_get_parent(TypeImpl *type) 179 { 180 if (!type->parent_type && type->parent) { 181 type->parent_type = type_get_by_name(type->parent); 182 if (!type->parent_type) { 183 fprintf(stderr, "Type '%s' is missing its parent '%s'\n", 184 type->name, type->parent); 185 abort(); 186 } 187 } 188 189 return type->parent_type; 190 } 191 192 static bool type_has_parent(TypeImpl *type) 193 { 194 return (type->parent != NULL); 195 } 196 197 static size_t type_class_get_size(TypeImpl *ti) 198 { 199 if (ti->class_size) { 200 return ti->class_size; 201 } 202 203 if (type_has_parent(ti)) { 204 return type_class_get_size(type_get_parent(ti)); 205 } 206 207 return sizeof(ObjectClass); 208 } 209 210 static size_t type_object_get_size(TypeImpl *ti) 211 { 212 if (ti->instance_size) { 213 return ti->instance_size; 214 } 215 216 if (type_has_parent(ti)) { 217 return type_object_get_size(type_get_parent(ti)); 218 } 219 220 return 0; 221 } 222 223 static size_t type_object_get_align(TypeImpl *ti) 224 { 225 if (ti->instance_align) { 226 return ti->instance_align; 227 } 228 229 if (type_has_parent(ti)) { 230 return type_object_get_align(type_get_parent(ti)); 231 } 232 233 return 0; 234 } 235 236 size_t object_type_get_instance_size(const char *typename) 237 { 238 TypeImpl *type = type_get_by_name(typename); 239 240 g_assert(type != NULL); 241 return type_object_get_size(type); 242 } 243 244 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type) 245 { 246 assert(target_type); 247 248 /* Check if target_type is a direct ancestor of type */ 249 while (type) { 250 if (type == target_type) { 251 return true; 252 } 253 254 type = type_get_parent(type); 255 } 256 257 return false; 258 } 259 260 static void type_initialize(TypeImpl *ti); 261 262 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type, 263 TypeImpl *parent_type) 264 { 265 InterfaceClass *new_iface; 266 TypeInfo info = { }; 267 TypeImpl *iface_impl; 268 269 info.parent = parent_type->name; 270 info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name); 271 info.abstract = true; 272 273 iface_impl = type_new(&info); 274 iface_impl->parent_type = parent_type; 275 type_initialize(iface_impl); 276 g_free((char *)info.name); 277 278 new_iface = (InterfaceClass *)iface_impl->class; 279 new_iface->concrete_class = ti->class; 280 new_iface->interface_type = interface_type; 281 282 ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface); 283 } 284 285 static void object_property_free(gpointer data) 286 { 287 ObjectProperty *prop = data; 288 289 if (prop->defval) { 290 qobject_unref(prop->defval); 291 prop->defval = NULL; 292 } 293 g_free(prop->name); 294 g_free(prop->type); 295 g_free(prop->description); 296 g_free(prop); 297 } 298 299 static void type_initialize(TypeImpl *ti) 300 { 301 TypeImpl *parent; 302 303 if (ti->class) { 304 return; 305 } 306 307 ti->class_size = type_class_get_size(ti); 308 ti->instance_size = type_object_get_size(ti); 309 ti->instance_align = type_object_get_align(ti); 310 /* Any type with zero instance_size is implicitly abstract. 311 * This means interface types are all abstract. 312 */ 313 if (ti->instance_size == 0) { 314 ti->abstract = true; 315 } 316 if (type_is_ancestor(ti, type_interface)) { 317 assert(ti->instance_size == 0); 318 assert(ti->abstract); 319 assert(!ti->instance_init); 320 assert(!ti->instance_post_init); 321 assert(!ti->instance_finalize); 322 assert(!ti->num_interfaces); 323 } 324 ti->class = g_malloc0(ti->class_size); 325 326 parent = type_get_parent(ti); 327 if (parent) { 328 type_initialize(parent); 329 GSList *e; 330 int i; 331 332 g_assert(parent->class_size <= ti->class_size); 333 g_assert(parent->instance_size <= ti->instance_size); 334 memcpy(ti->class, parent->class, parent->class_size); 335 ti->class->interfaces = NULL; 336 337 for (e = parent->class->interfaces; e; e = e->next) { 338 InterfaceClass *iface = e->data; 339 ObjectClass *klass = OBJECT_CLASS(iface); 340 341 type_initialize_interface(ti, iface->interface_type, klass->type); 342 } 343 344 for (i = 0; i < ti->num_interfaces; i++) { 345 TypeImpl *t = type_get_by_name(ti->interfaces[i].typename); 346 if (!t) { 347 error_report("missing interface '%s' for object '%s'", 348 ti->interfaces[i].typename, parent->name); 349 abort(); 350 } 351 for (e = ti->class->interfaces; e; e = e->next) { 352 TypeImpl *target_type = OBJECT_CLASS(e->data)->type; 353 354 if (type_is_ancestor(target_type, t)) { 355 break; 356 } 357 } 358 359 if (e) { 360 continue; 361 } 362 363 type_initialize_interface(ti, t, t); 364 } 365 } 366 367 ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, 368 object_property_free); 369 370 ti->class->type = ti; 371 372 while (parent) { 373 if (parent->class_base_init) { 374 parent->class_base_init(ti->class, ti->class_data); 375 } 376 parent = type_get_parent(parent); 377 } 378 379 if (ti->class_init) { 380 ti->class_init(ti->class, ti->class_data); 381 } 382 } 383 384 static void object_init_with_type(Object *obj, TypeImpl *ti) 385 { 386 if (type_has_parent(ti)) { 387 object_init_with_type(obj, type_get_parent(ti)); 388 } 389 390 if (ti->instance_init) { 391 ti->instance_init(obj); 392 } 393 } 394 395 static void object_post_init_with_type(Object *obj, TypeImpl *ti) 396 { 397 if (ti->instance_post_init) { 398 ti->instance_post_init(obj); 399 } 400 401 if (type_has_parent(ti)) { 402 object_post_init_with_type(obj, type_get_parent(ti)); 403 } 404 } 405 406 bool object_apply_global_props(Object *obj, const GPtrArray *props, 407 Error **errp) 408 { 409 int i; 410 411 if (!props) { 412 return true; 413 } 414 415 for (i = 0; i < props->len; i++) { 416 GlobalProperty *p = g_ptr_array_index(props, i); 417 Error *err = NULL; 418 419 if (object_dynamic_cast(obj, p->driver) == NULL) { 420 continue; 421 } 422 if (p->optional && !object_property_find(obj, p->property)) { 423 continue; 424 } 425 p->used = true; 426 if (!object_property_parse(obj, p->property, p->value, &err)) { 427 error_prepend(&err, "can't apply global %s.%s=%s: ", 428 p->driver, p->property, p->value); 429 /* 430 * If errp != NULL, propagate error and return. 431 * If errp == NULL, report a warning, but keep going 432 * with the remaining globals. 433 */ 434 if (errp) { 435 error_propagate(errp, err); 436 return false; 437 } else { 438 warn_report_err(err); 439 } 440 } 441 } 442 443 return true; 444 } 445 446 /* 447 * Global property defaults 448 * Slot 0: accelerator's global property defaults 449 * Slot 1: machine's global property defaults 450 * Slot 2: global properties from legacy command line option 451 * Each is a GPtrArray of of GlobalProperty. 452 * Applied in order, later entries override earlier ones. 453 */ 454 static GPtrArray *object_compat_props[3]; 455 456 /* 457 * Retrieve @GPtrArray for global property defined with options 458 * other than "-global". These are generally used for syntactic 459 * sugar and legacy command line options. 460 */ 461 void object_register_sugar_prop(const char *driver, const char *prop, 462 const char *value, bool optional) 463 { 464 GlobalProperty *g; 465 if (!object_compat_props[2]) { 466 object_compat_props[2] = g_ptr_array_new(); 467 } 468 g = g_new0(GlobalProperty, 1); 469 g->driver = g_strdup(driver); 470 g->property = g_strdup(prop); 471 g->value = g_strdup(value); 472 g->optional = optional; 473 g_ptr_array_add(object_compat_props[2], g); 474 } 475 476 /* 477 * Set machine's global property defaults to @compat_props. 478 * May be called at most once. 479 */ 480 void object_set_machine_compat_props(GPtrArray *compat_props) 481 { 482 assert(!object_compat_props[1]); 483 object_compat_props[1] = compat_props; 484 } 485 486 /* 487 * Set accelerator's global property defaults to @compat_props. 488 * May be called at most once. 489 */ 490 void object_set_accelerator_compat_props(GPtrArray *compat_props) 491 { 492 assert(!object_compat_props[0]); 493 object_compat_props[0] = compat_props; 494 } 495 496 void object_apply_compat_props(Object *obj) 497 { 498 int i; 499 500 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) { 501 object_apply_global_props(obj, object_compat_props[i], 502 i == 2 ? &error_fatal : &error_abort); 503 } 504 } 505 506 static void object_class_property_init_all(Object *obj) 507 { 508 ObjectPropertyIterator iter; 509 ObjectProperty *prop; 510 511 object_class_property_iter_init(&iter, object_get_class(obj)); 512 while ((prop = object_property_iter_next(&iter))) { 513 if (prop->init) { 514 prop->init(obj, prop); 515 } 516 } 517 } 518 519 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type) 520 { 521 type_initialize(type); 522 523 g_assert(type->instance_size >= sizeof(Object)); 524 g_assert(type->abstract == false); 525 g_assert(size >= type->instance_size); 526 527 memset(obj, 0, type->instance_size); 528 obj->class = type->class; 529 object_ref(obj); 530 object_class_property_init_all(obj); 531 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal, 532 NULL, object_property_free); 533 object_init_with_type(obj, type); 534 object_post_init_with_type(obj, type); 535 } 536 537 void object_initialize(void *data, size_t size, const char *typename) 538 { 539 TypeImpl *type = type_get_by_name(typename); 540 541 #ifdef CONFIG_MODULES 542 if (!type) { 543 int rv = module_load_qom(typename, &error_fatal); 544 if (rv > 0) { 545 type = type_get_by_name(typename); 546 } else { 547 error_report("missing object type '%s'", typename); 548 exit(1); 549 } 550 } 551 #endif 552 if (!type) { 553 error_report("missing object type '%s'", typename); 554 abort(); 555 } 556 557 object_initialize_with_type(data, size, type); 558 } 559 560 bool object_initialize_child_with_props(Object *parentobj, 561 const char *propname, 562 void *childobj, size_t size, 563 const char *type, 564 Error **errp, ...) 565 { 566 va_list vargs; 567 bool ok; 568 569 va_start(vargs, errp); 570 ok = object_initialize_child_with_propsv(parentobj, propname, 571 childobj, size, type, errp, 572 vargs); 573 va_end(vargs); 574 return ok; 575 } 576 577 bool object_initialize_child_with_propsv(Object *parentobj, 578 const char *propname, 579 void *childobj, size_t size, 580 const char *type, 581 Error **errp, va_list vargs) 582 { 583 bool ok = false; 584 Object *obj; 585 UserCreatable *uc; 586 587 object_initialize(childobj, size, type); 588 obj = OBJECT(childobj); 589 590 if (!object_set_propv(obj, errp, vargs)) { 591 goto out; 592 } 593 594 object_property_add_child(parentobj, propname, obj); 595 596 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 597 if (uc) { 598 if (!user_creatable_complete(uc, errp)) { 599 object_unparent(obj); 600 goto out; 601 } 602 } 603 604 ok = true; 605 606 out: 607 /* 608 * We want @obj's reference to be 1 on success, 0 on failure. 609 * On success, it's 2: one taken by object_initialize(), and one 610 * by object_property_add_child(). 611 * On failure in object_initialize() or earlier, it's 1. 612 * On failure afterwards, it's also 1: object_unparent() releases 613 * the reference taken by object_property_add_child(). 614 */ 615 object_unref(obj); 616 return ok; 617 } 618 619 void object_initialize_child_internal(Object *parent, 620 const char *propname, 621 void *child, size_t size, 622 const char *type) 623 { 624 object_initialize_child_with_props(parent, propname, child, size, type, 625 &error_abort, NULL); 626 } 627 628 static inline bool object_property_is_child(ObjectProperty *prop) 629 { 630 return strstart(prop->type, "child<", NULL); 631 } 632 633 static void object_property_del_all(Object *obj) 634 { 635 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL); 636 ObjectProperty *prop; 637 ObjectPropertyIterator iter; 638 bool released; 639 640 do { 641 released = false; 642 object_property_iter_init(&iter, obj); 643 while ((prop = object_property_iter_next(&iter)) != NULL) { 644 if (g_hash_table_add(done, prop)) { 645 if (prop->release) { 646 prop->release(obj, prop->name, prop->opaque); 647 released = true; 648 break; 649 } 650 } 651 } 652 } while (released); 653 654 g_hash_table_unref(obj->properties); 655 } 656 657 static void object_property_del_child(Object *obj, Object *child) 658 { 659 ObjectProperty *prop; 660 GHashTableIter iter; 661 gpointer key, value; 662 663 g_hash_table_iter_init(&iter, obj->properties); 664 while (g_hash_table_iter_next(&iter, &key, &value)) { 665 prop = value; 666 if (object_property_is_child(prop) && prop->opaque == child) { 667 if (prop->release) { 668 prop->release(obj, prop->name, prop->opaque); 669 prop->release = NULL; 670 } 671 break; 672 } 673 } 674 g_hash_table_iter_init(&iter, obj->properties); 675 while (g_hash_table_iter_next(&iter, &key, &value)) { 676 prop = value; 677 if (object_property_is_child(prop) && prop->opaque == child) { 678 g_hash_table_iter_remove(&iter); 679 break; 680 } 681 } 682 } 683 684 void object_unparent(Object *obj) 685 { 686 if (obj->parent) { 687 object_property_del_child(obj->parent, obj); 688 } 689 } 690 691 static void object_deinit(Object *obj, TypeImpl *type) 692 { 693 if (type->instance_finalize) { 694 type->instance_finalize(obj); 695 } 696 697 if (type_has_parent(type)) { 698 object_deinit(obj, type_get_parent(type)); 699 } 700 } 701 702 static void object_finalize(void *data) 703 { 704 Object *obj = data; 705 TypeImpl *ti = obj->class->type; 706 707 object_property_del_all(obj); 708 object_deinit(obj, ti); 709 710 g_assert(obj->ref == 0); 711 g_assert(obj->parent == NULL); 712 if (obj->free) { 713 obj->free(obj); 714 } 715 } 716 717 /* Find the minimum alignment guaranteed by the system malloc. */ 718 #if __STDC_VERSION__ >= 201112L 719 typedef max_align_t qemu_max_align_t; 720 #else 721 typedef union { 722 long l; 723 void *p; 724 double d; 725 long double ld; 726 } qemu_max_align_t; 727 #endif 728 729 static Object *object_new_with_type(Type type) 730 { 731 Object *obj; 732 size_t size, align; 733 void (*obj_free)(void *); 734 735 g_assert(type != NULL); 736 type_initialize(type); 737 738 size = type->instance_size; 739 align = type->instance_align; 740 741 /* 742 * Do not use qemu_memalign unless required. Depending on the 743 * implementation, extra alignment implies extra overhead. 744 */ 745 if (likely(align <= __alignof__(qemu_max_align_t))) { 746 obj = g_malloc(size); 747 obj_free = g_free; 748 } else { 749 obj = qemu_memalign(align, size); 750 obj_free = qemu_vfree; 751 } 752 753 object_initialize_with_type(obj, size, type); 754 obj->free = obj_free; 755 756 return obj; 757 } 758 759 Object *object_new_with_class(ObjectClass *klass) 760 { 761 return object_new_with_type(klass->type); 762 } 763 764 Object *object_new(const char *typename) 765 { 766 TypeImpl *ti = type_get_by_name(typename); 767 768 return object_new_with_type(ti); 769 } 770 771 772 Object *object_new_with_props(const char *typename, 773 Object *parent, 774 const char *id, 775 Error **errp, 776 ...) 777 { 778 va_list vargs; 779 Object *obj; 780 781 va_start(vargs, errp); 782 obj = object_new_with_propv(typename, parent, id, errp, vargs); 783 va_end(vargs); 784 785 return obj; 786 } 787 788 789 Object *object_new_with_propv(const char *typename, 790 Object *parent, 791 const char *id, 792 Error **errp, 793 va_list vargs) 794 { 795 Object *obj; 796 ObjectClass *klass; 797 UserCreatable *uc; 798 799 klass = object_class_by_name(typename); 800 if (!klass) { 801 error_setg(errp, "invalid object type: %s", typename); 802 return NULL; 803 } 804 805 if (object_class_is_abstract(klass)) { 806 error_setg(errp, "object type '%s' is abstract", typename); 807 return NULL; 808 } 809 obj = object_new_with_type(klass->type); 810 811 if (!object_set_propv(obj, errp, vargs)) { 812 goto error; 813 } 814 815 if (id != NULL) { 816 object_property_add_child(parent, id, obj); 817 } 818 819 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE); 820 if (uc) { 821 if (!user_creatable_complete(uc, errp)) { 822 if (id != NULL) { 823 object_unparent(obj); 824 } 825 goto error; 826 } 827 } 828 829 object_unref(obj); 830 return obj; 831 832 error: 833 object_unref(obj); 834 return NULL; 835 } 836 837 838 bool object_set_props(Object *obj, 839 Error **errp, 840 ...) 841 { 842 va_list vargs; 843 bool ret; 844 845 va_start(vargs, errp); 846 ret = object_set_propv(obj, errp, vargs); 847 va_end(vargs); 848 849 return ret; 850 } 851 852 853 bool object_set_propv(Object *obj, 854 Error **errp, 855 va_list vargs) 856 { 857 const char *propname; 858 859 propname = va_arg(vargs, char *); 860 while (propname != NULL) { 861 const char *value = va_arg(vargs, char *); 862 863 g_assert(value != NULL); 864 if (!object_property_parse(obj, propname, value, errp)) { 865 return false; 866 } 867 propname = va_arg(vargs, char *); 868 } 869 870 return true; 871 } 872 873 874 Object *object_dynamic_cast(Object *obj, const char *typename) 875 { 876 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) { 877 return obj; 878 } 879 880 return NULL; 881 } 882 883 Object *object_dynamic_cast_assert(Object *obj, const char *typename, 884 const char *file, int line, const char *func) 885 { 886 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)", 887 typename, file, line, func); 888 889 #ifdef CONFIG_QOM_CAST_DEBUG 890 int i; 891 Object *inst; 892 893 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) { 894 if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) { 895 goto out; 896 } 897 } 898 899 inst = object_dynamic_cast(obj, typename); 900 901 if (!inst && obj) { 902 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 903 file, line, func, obj, typename); 904 abort(); 905 } 906 907 assert(obj == inst); 908 909 if (obj && obj == inst) { 910 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 911 qatomic_set(&obj->class->object_cast_cache[i - 1], 912 qatomic_read(&obj->class->object_cast_cache[i])); 913 } 914 qatomic_set(&obj->class->object_cast_cache[i - 1], typename); 915 } 916 917 out: 918 #endif 919 return obj; 920 } 921 922 ObjectClass *object_class_dynamic_cast(ObjectClass *class, 923 const char *typename) 924 { 925 ObjectClass *ret = NULL; 926 TypeImpl *target_type; 927 TypeImpl *type; 928 929 if (!class) { 930 return NULL; 931 } 932 933 /* A simple fast path that can trigger a lot for leaf classes. */ 934 type = class->type; 935 if (type->name == typename) { 936 return class; 937 } 938 939 target_type = type_get_by_name(typename); 940 if (!target_type) { 941 /* target class type unknown, so fail the cast */ 942 return NULL; 943 } 944 945 if (type->class->interfaces && 946 type_is_ancestor(target_type, type_interface)) { 947 int found = 0; 948 GSList *i; 949 950 for (i = class->interfaces; i; i = i->next) { 951 ObjectClass *target_class = i->data; 952 953 if (type_is_ancestor(target_class->type, target_type)) { 954 ret = target_class; 955 found++; 956 } 957 } 958 959 /* The match was ambiguous, don't allow a cast */ 960 if (found > 1) { 961 ret = NULL; 962 } 963 } else if (type_is_ancestor(type, target_type)) { 964 ret = class; 965 } 966 967 return ret; 968 } 969 970 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, 971 const char *typename, 972 const char *file, int line, 973 const char *func) 974 { 975 ObjectClass *ret; 976 977 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)", 978 typename, file, line, func); 979 980 #ifdef CONFIG_QOM_CAST_DEBUG 981 int i; 982 983 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { 984 if (qatomic_read(&class->class_cast_cache[i]) == typename) { 985 ret = class; 986 goto out; 987 } 988 } 989 #else 990 if (!class || !class->interfaces) { 991 return class; 992 } 993 #endif 994 995 ret = object_class_dynamic_cast(class, typename); 996 if (!ret && class) { 997 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n", 998 file, line, func, class, typename); 999 abort(); 1000 } 1001 1002 #ifdef CONFIG_QOM_CAST_DEBUG 1003 if (class && ret == class) { 1004 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { 1005 qatomic_set(&class->class_cast_cache[i - 1], 1006 qatomic_read(&class->class_cast_cache[i])); 1007 } 1008 qatomic_set(&class->class_cast_cache[i - 1], typename); 1009 } 1010 out: 1011 #endif 1012 return ret; 1013 } 1014 1015 const char *object_get_typename(const Object *obj) 1016 { 1017 return obj->class->type->name; 1018 } 1019 1020 ObjectClass *object_get_class(Object *obj) 1021 { 1022 return obj->class; 1023 } 1024 1025 bool object_class_is_abstract(ObjectClass *klass) 1026 { 1027 return klass->type->abstract; 1028 } 1029 1030 const char *object_class_get_name(ObjectClass *klass) 1031 { 1032 return klass->type->name; 1033 } 1034 1035 ObjectClass *object_class_by_name(const char *typename) 1036 { 1037 TypeImpl *type = type_get_by_name(typename); 1038 1039 if (!type) { 1040 return NULL; 1041 } 1042 1043 type_initialize(type); 1044 1045 return type->class; 1046 } 1047 1048 ObjectClass *module_object_class_by_name(const char *typename) 1049 { 1050 ObjectClass *oc; 1051 1052 oc = object_class_by_name(typename); 1053 #ifdef CONFIG_MODULES 1054 if (!oc) { 1055 Error *local_err = NULL; 1056 int rv = module_load_qom(typename, &local_err); 1057 if (rv > 0) { 1058 oc = object_class_by_name(typename); 1059 } else if (rv < 0) { 1060 error_report_err(local_err); 1061 } 1062 } 1063 #endif 1064 return oc; 1065 } 1066 1067 ObjectClass *object_class_get_parent(ObjectClass *class) 1068 { 1069 TypeImpl *type = type_get_parent(class->type); 1070 1071 if (!type) { 1072 return NULL; 1073 } 1074 1075 type_initialize(type); 1076 1077 return type->class; 1078 } 1079 1080 typedef struct OCFData 1081 { 1082 void (*fn)(ObjectClass *klass, void *opaque); 1083 const char *implements_type; 1084 bool include_abstract; 1085 void *opaque; 1086 } OCFData; 1087 1088 static void object_class_foreach_tramp(gpointer key, gpointer value, 1089 gpointer opaque) 1090 { 1091 OCFData *data = opaque; 1092 TypeImpl *type = value; 1093 ObjectClass *k; 1094 1095 type_initialize(type); 1096 k = type->class; 1097 1098 if (!data->include_abstract && type->abstract) { 1099 return; 1100 } 1101 1102 if (data->implements_type && 1103 !object_class_dynamic_cast(k, data->implements_type)) { 1104 return; 1105 } 1106 1107 data->fn(k, data->opaque); 1108 } 1109 1110 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), 1111 const char *implements_type, bool include_abstract, 1112 void *opaque) 1113 { 1114 OCFData data = { fn, implements_type, include_abstract, opaque }; 1115 1116 enumerating_types = true; 1117 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); 1118 enumerating_types = false; 1119 } 1120 1121 static int do_object_child_foreach(Object *obj, 1122 int (*fn)(Object *child, void *opaque), 1123 void *opaque, bool recurse) 1124 { 1125 GHashTableIter iter; 1126 ObjectProperty *prop; 1127 int ret = 0; 1128 1129 g_hash_table_iter_init(&iter, obj->properties); 1130 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1131 if (object_property_is_child(prop)) { 1132 Object *child = prop->opaque; 1133 1134 ret = fn(child, opaque); 1135 if (ret != 0) { 1136 break; 1137 } 1138 if (recurse) { 1139 ret = do_object_child_foreach(child, fn, opaque, true); 1140 if (ret != 0) { 1141 break; 1142 } 1143 } 1144 } 1145 } 1146 return ret; 1147 } 1148 1149 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), 1150 void *opaque) 1151 { 1152 return do_object_child_foreach(obj, fn, opaque, false); 1153 } 1154 1155 int object_child_foreach_recursive(Object *obj, 1156 int (*fn)(Object *child, void *opaque), 1157 void *opaque) 1158 { 1159 return do_object_child_foreach(obj, fn, opaque, true); 1160 } 1161 1162 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) 1163 { 1164 GSList **list = opaque; 1165 1166 *list = g_slist_prepend(*list, klass); 1167 } 1168 1169 GSList *object_class_get_list(const char *implements_type, 1170 bool include_abstract) 1171 { 1172 GSList *list = NULL; 1173 1174 object_class_foreach(object_class_get_list_tramp, 1175 implements_type, include_abstract, &list); 1176 return list; 1177 } 1178 1179 static gint object_class_cmp(gconstpointer a, gconstpointer b) 1180 { 1181 return strcasecmp(object_class_get_name((ObjectClass *)a), 1182 object_class_get_name((ObjectClass *)b)); 1183 } 1184 1185 GSList *object_class_get_list_sorted(const char *implements_type, 1186 bool include_abstract) 1187 { 1188 return g_slist_sort(object_class_get_list(implements_type, include_abstract), 1189 object_class_cmp); 1190 } 1191 1192 Object *object_ref(void *objptr) 1193 { 1194 Object *obj = OBJECT(objptr); 1195 uint32_t ref; 1196 1197 if (!obj) { 1198 return NULL; 1199 } 1200 ref = qatomic_fetch_inc(&obj->ref); 1201 /* Assert waaay before the integer overflows */ 1202 g_assert(ref < INT_MAX); 1203 return obj; 1204 } 1205 1206 void object_unref(void *objptr) 1207 { 1208 Object *obj = OBJECT(objptr); 1209 if (!obj) { 1210 return; 1211 } 1212 g_assert(obj->ref > 0); 1213 1214 /* parent always holds a reference to its children */ 1215 if (qatomic_fetch_dec(&obj->ref) == 1) { 1216 object_finalize(obj); 1217 } 1218 } 1219 1220 ObjectProperty * 1221 object_property_try_add(Object *obj, const char *name, const char *type, 1222 ObjectPropertyAccessor *get, 1223 ObjectPropertyAccessor *set, 1224 ObjectPropertyRelease *release, 1225 void *opaque, Error **errp) 1226 { 1227 ObjectProperty *prop; 1228 size_t name_len = strlen(name); 1229 1230 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1231 int i; 1232 ObjectProperty *ret = NULL; 1233 char *name_no_array = g_strdup(name); 1234 1235 name_no_array[name_len - 3] = '\0'; 1236 for (i = 0; i < INT16_MAX; ++i) { 1237 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1238 1239 ret = object_property_try_add(obj, full_name, type, get, set, 1240 release, opaque, NULL); 1241 g_free(full_name); 1242 if (ret) { 1243 break; 1244 } 1245 } 1246 g_free(name_no_array); 1247 assert(ret); 1248 return ret; 1249 } 1250 1251 if (object_property_find(obj, name) != NULL) { 1252 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1253 name, object_get_typename(obj)); 1254 return NULL; 1255 } 1256 1257 prop = g_malloc0(sizeof(*prop)); 1258 1259 prop->name = g_strdup(name); 1260 prop->type = g_strdup(type); 1261 1262 prop->get = get; 1263 prop->set = set; 1264 prop->release = release; 1265 prop->opaque = opaque; 1266 1267 g_hash_table_insert(obj->properties, prop->name, prop); 1268 return prop; 1269 } 1270 1271 ObjectProperty * 1272 object_property_add(Object *obj, const char *name, const char *type, 1273 ObjectPropertyAccessor *get, 1274 ObjectPropertyAccessor *set, 1275 ObjectPropertyRelease *release, 1276 void *opaque) 1277 { 1278 return object_property_try_add(obj, name, type, get, set, release, 1279 opaque, &error_abort); 1280 } 1281 1282 ObjectProperty * 1283 object_class_property_add(ObjectClass *klass, 1284 const char *name, 1285 const char *type, 1286 ObjectPropertyAccessor *get, 1287 ObjectPropertyAccessor *set, 1288 ObjectPropertyRelease *release, 1289 void *opaque) 1290 { 1291 ObjectProperty *prop; 1292 1293 assert(!object_class_property_find(klass, name)); 1294 1295 prop = g_malloc0(sizeof(*prop)); 1296 1297 prop->name = g_strdup(name); 1298 prop->type = g_strdup(type); 1299 1300 prop->get = get; 1301 prop->set = set; 1302 prop->release = release; 1303 prop->opaque = opaque; 1304 1305 g_hash_table_insert(klass->properties, prop->name, prop); 1306 1307 return prop; 1308 } 1309 1310 ObjectProperty *object_property_find(Object *obj, const char *name) 1311 { 1312 ObjectProperty *prop; 1313 ObjectClass *klass = object_get_class(obj); 1314 1315 prop = object_class_property_find(klass, name); 1316 if (prop) { 1317 return prop; 1318 } 1319 1320 return g_hash_table_lookup(obj->properties, name); 1321 } 1322 1323 ObjectProperty *object_property_find_err(Object *obj, const char *name, 1324 Error **errp) 1325 { 1326 ObjectProperty *prop = object_property_find(obj, name); 1327 if (!prop) { 1328 error_setg(errp, "Property '%s.%s' not found", 1329 object_get_typename(obj), name); 1330 } 1331 return prop; 1332 } 1333 1334 void object_property_iter_init(ObjectPropertyIterator *iter, 1335 Object *obj) 1336 { 1337 g_hash_table_iter_init(&iter->iter, obj->properties); 1338 iter->nextclass = object_get_class(obj); 1339 } 1340 1341 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1342 { 1343 gpointer key, val; 1344 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1345 if (!iter->nextclass) { 1346 return NULL; 1347 } 1348 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1349 iter->nextclass = object_class_get_parent(iter->nextclass); 1350 } 1351 return val; 1352 } 1353 1354 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1355 ObjectClass *klass) 1356 { 1357 g_hash_table_iter_init(&iter->iter, klass->properties); 1358 iter->nextclass = object_class_get_parent(klass); 1359 } 1360 1361 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name) 1362 { 1363 ObjectClass *parent_klass; 1364 1365 parent_klass = object_class_get_parent(klass); 1366 if (parent_klass) { 1367 ObjectProperty *prop = 1368 object_class_property_find(parent_klass, name); 1369 if (prop) { 1370 return prop; 1371 } 1372 } 1373 1374 return g_hash_table_lookup(klass->properties, name); 1375 } 1376 1377 ObjectProperty *object_class_property_find_err(ObjectClass *klass, 1378 const char *name, 1379 Error **errp) 1380 { 1381 ObjectProperty *prop = object_class_property_find(klass, name); 1382 if (!prop) { 1383 error_setg(errp, "Property '.%s' not found", name); 1384 } 1385 return prop; 1386 } 1387 1388 1389 void object_property_del(Object *obj, const char *name) 1390 { 1391 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1392 1393 if (prop->release) { 1394 prop->release(obj, name, prop->opaque); 1395 } 1396 g_hash_table_remove(obj->properties, name); 1397 } 1398 1399 bool object_property_get(Object *obj, const char *name, Visitor *v, 1400 Error **errp) 1401 { 1402 Error *err = NULL; 1403 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1404 1405 if (prop == NULL) { 1406 return false; 1407 } 1408 1409 if (!prop->get) { 1410 error_setg(errp, "Property '%s.%s' is not readable", 1411 object_get_typename(obj), name); 1412 return false; 1413 } 1414 prop->get(obj, v, name, prop->opaque, &err); 1415 error_propagate(errp, err); 1416 return !err; 1417 } 1418 1419 bool object_property_set(Object *obj, const char *name, Visitor *v, 1420 Error **errp) 1421 { 1422 ERRP_GUARD(); 1423 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1424 1425 if (prop == NULL) { 1426 return false; 1427 } 1428 1429 if (!prop->set) { 1430 error_setg(errp, "Property '%s.%s' is not writable", 1431 object_get_typename(obj), name); 1432 return false; 1433 } 1434 prop->set(obj, v, name, prop->opaque, errp); 1435 return !*errp; 1436 } 1437 1438 bool object_property_set_str(Object *obj, const char *name, 1439 const char *value, Error **errp) 1440 { 1441 QString *qstr = qstring_from_str(value); 1442 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp); 1443 1444 qobject_unref(qstr); 1445 return ok; 1446 } 1447 1448 char *object_property_get_str(Object *obj, const char *name, 1449 Error **errp) 1450 { 1451 QObject *ret = object_property_get_qobject(obj, name, errp); 1452 QString *qstring; 1453 char *retval; 1454 1455 if (!ret) { 1456 return NULL; 1457 } 1458 qstring = qobject_to(QString, ret); 1459 if (!qstring) { 1460 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1461 retval = NULL; 1462 } else { 1463 retval = g_strdup(qstring_get_str(qstring)); 1464 } 1465 1466 qobject_unref(ret); 1467 return retval; 1468 } 1469 1470 bool object_property_set_link(Object *obj, const char *name, 1471 Object *value, Error **errp) 1472 { 1473 g_autofree char *path = NULL; 1474 1475 if (value) { 1476 path = object_get_canonical_path(value); 1477 } 1478 return object_property_set_str(obj, name, path ?: "", errp); 1479 } 1480 1481 Object *object_property_get_link(Object *obj, const char *name, 1482 Error **errp) 1483 { 1484 char *str = object_property_get_str(obj, name, errp); 1485 Object *target = NULL; 1486 1487 if (str && *str) { 1488 target = object_resolve_path(str, NULL); 1489 if (!target) { 1490 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1491 "Device '%s' not found", str); 1492 } 1493 } 1494 1495 g_free(str); 1496 return target; 1497 } 1498 1499 bool object_property_set_bool(Object *obj, const char *name, 1500 bool value, Error **errp) 1501 { 1502 QBool *qbool = qbool_from_bool(value); 1503 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp); 1504 1505 qobject_unref(qbool); 1506 return ok; 1507 } 1508 1509 bool object_property_get_bool(Object *obj, const char *name, 1510 Error **errp) 1511 { 1512 QObject *ret = object_property_get_qobject(obj, name, errp); 1513 QBool *qbool; 1514 bool retval; 1515 1516 if (!ret) { 1517 return false; 1518 } 1519 qbool = qobject_to(QBool, ret); 1520 if (!qbool) { 1521 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1522 retval = false; 1523 } else { 1524 retval = qbool_get_bool(qbool); 1525 } 1526 1527 qobject_unref(ret); 1528 return retval; 1529 } 1530 1531 bool object_property_set_int(Object *obj, const char *name, 1532 int64_t value, Error **errp) 1533 { 1534 QNum *qnum = qnum_from_int(value); 1535 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1536 1537 qobject_unref(qnum); 1538 return ok; 1539 } 1540 1541 int64_t object_property_get_int(Object *obj, const char *name, 1542 Error **errp) 1543 { 1544 QObject *ret = object_property_get_qobject(obj, name, errp); 1545 QNum *qnum; 1546 int64_t retval; 1547 1548 if (!ret) { 1549 return -1; 1550 } 1551 1552 qnum = qobject_to(QNum, ret); 1553 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1554 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1555 retval = -1; 1556 } 1557 1558 qobject_unref(ret); 1559 return retval; 1560 } 1561 1562 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1563 { 1564 Visitor *v = qobject_input_visitor_new(prop->defval); 1565 1566 assert(prop->set != NULL); 1567 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1568 1569 visit_free(v); 1570 } 1571 1572 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1573 { 1574 assert(!prop->defval); 1575 assert(!prop->init); 1576 1577 prop->defval = defval; 1578 prop->init = object_property_init_defval; 1579 } 1580 1581 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1582 { 1583 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1584 } 1585 1586 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1587 { 1588 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1589 } 1590 1591 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1592 { 1593 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1594 } 1595 1596 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1597 { 1598 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1599 } 1600 1601 bool object_property_set_uint(Object *obj, const char *name, 1602 uint64_t value, Error **errp) 1603 { 1604 QNum *qnum = qnum_from_uint(value); 1605 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp); 1606 1607 qobject_unref(qnum); 1608 return ok; 1609 } 1610 1611 uint64_t object_property_get_uint(Object *obj, const char *name, 1612 Error **errp) 1613 { 1614 QObject *ret = object_property_get_qobject(obj, name, errp); 1615 QNum *qnum; 1616 uint64_t retval; 1617 1618 if (!ret) { 1619 return 0; 1620 } 1621 qnum = qobject_to(QNum, ret); 1622 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1623 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1624 retval = 0; 1625 } 1626 1627 qobject_unref(ret); 1628 return retval; 1629 } 1630 1631 typedef struct EnumProperty { 1632 const QEnumLookup *lookup; 1633 int (*get)(Object *, Error **); 1634 void (*set)(Object *, int, Error **); 1635 } EnumProperty; 1636 1637 int object_property_get_enum(Object *obj, const char *name, 1638 const char *typename, Error **errp) 1639 { 1640 char *str; 1641 int ret; 1642 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1643 EnumProperty *enumprop; 1644 1645 if (prop == NULL) { 1646 return -1; 1647 } 1648 1649 if (!g_str_equal(prop->type, typename)) { 1650 error_setg(errp, "Property %s on %s is not '%s' enum type", 1651 name, object_class_get_name( 1652 object_get_class(obj)), typename); 1653 return -1; 1654 } 1655 1656 enumprop = prop->opaque; 1657 1658 str = object_property_get_str(obj, name, errp); 1659 if (!str) { 1660 return -1; 1661 } 1662 1663 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1664 g_free(str); 1665 1666 return ret; 1667 } 1668 1669 bool object_property_parse(Object *obj, const char *name, 1670 const char *string, Error **errp) 1671 { 1672 Visitor *v = string_input_visitor_new(string); 1673 bool ok = object_property_set(obj, name, v, errp); 1674 1675 visit_free(v); 1676 return ok; 1677 } 1678 1679 char *object_property_print(Object *obj, const char *name, bool human, 1680 Error **errp) 1681 { 1682 Visitor *v; 1683 char *string = NULL; 1684 1685 v = string_output_visitor_new(human, &string); 1686 if (!object_property_get(obj, name, v, errp)) { 1687 goto out; 1688 } 1689 1690 visit_complete(v, &string); 1691 1692 out: 1693 visit_free(v); 1694 return string; 1695 } 1696 1697 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1698 { 1699 ObjectProperty *prop = object_property_find_err(obj, name, errp); 1700 if (prop == NULL) { 1701 return NULL; 1702 } 1703 1704 return prop->type; 1705 } 1706 1707 Object *object_get_root(void) 1708 { 1709 static Object *root; 1710 1711 if (!root) { 1712 root = object_new("container"); 1713 } 1714 1715 return root; 1716 } 1717 1718 Object *object_get_objects_root(void) 1719 { 1720 return container_get(object_get_root(), "/objects"); 1721 } 1722 1723 Object *object_get_internal_root(void) 1724 { 1725 static Object *internal_root; 1726 1727 if (!internal_root) { 1728 internal_root = object_new("container"); 1729 } 1730 1731 return internal_root; 1732 } 1733 1734 static void object_get_child_property(Object *obj, Visitor *v, 1735 const char *name, void *opaque, 1736 Error **errp) 1737 { 1738 Object *child = opaque; 1739 char *path; 1740 1741 path = object_get_canonical_path(child); 1742 visit_type_str(v, name, &path, errp); 1743 g_free(path); 1744 } 1745 1746 static Object *object_resolve_child_property(Object *parent, void *opaque, 1747 const char *part) 1748 { 1749 return opaque; 1750 } 1751 1752 static void object_finalize_child_property(Object *obj, const char *name, 1753 void *opaque) 1754 { 1755 Object *child = opaque; 1756 1757 if (child->class->unparent) { 1758 (child->class->unparent)(child); 1759 } 1760 child->parent = NULL; 1761 object_unref(child); 1762 } 1763 1764 ObjectProperty * 1765 object_property_try_add_child(Object *obj, const char *name, 1766 Object *child, Error **errp) 1767 { 1768 g_autofree char *type = NULL; 1769 ObjectProperty *op; 1770 1771 assert(!child->parent); 1772 1773 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1774 1775 op = object_property_try_add(obj, name, type, object_get_child_property, 1776 NULL, object_finalize_child_property, 1777 child, errp); 1778 if (!op) { 1779 return NULL; 1780 } 1781 op->resolve = object_resolve_child_property; 1782 object_ref(child); 1783 child->parent = obj; 1784 return op; 1785 } 1786 1787 ObjectProperty * 1788 object_property_add_child(Object *obj, const char *name, 1789 Object *child) 1790 { 1791 return object_property_try_add_child(obj, name, child, &error_abort); 1792 } 1793 1794 void object_property_allow_set_link(const Object *obj, const char *name, 1795 Object *val, Error **errp) 1796 { 1797 /* Allow the link to be set, always */ 1798 } 1799 1800 typedef struct { 1801 union { 1802 Object **targetp; 1803 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1804 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1805 }; 1806 void (*check)(const Object *, const char *, Object *, Error **); 1807 ObjectPropertyLinkFlags flags; 1808 } LinkProperty; 1809 1810 static Object ** 1811 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1812 { 1813 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1814 return &lprop->target; 1815 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1816 return (void *)obj + lprop->offset; 1817 } else { 1818 return lprop->targetp; 1819 } 1820 } 1821 1822 static void object_get_link_property(Object *obj, Visitor *v, 1823 const char *name, void *opaque, 1824 Error **errp) 1825 { 1826 LinkProperty *lprop = opaque; 1827 Object **targetp = object_link_get_targetp(obj, lprop); 1828 char *path; 1829 1830 if (*targetp) { 1831 path = object_get_canonical_path(*targetp); 1832 visit_type_str(v, name, &path, errp); 1833 g_free(path); 1834 } else { 1835 path = (char *)""; 1836 visit_type_str(v, name, &path, errp); 1837 } 1838 } 1839 1840 /* 1841 * object_resolve_link: 1842 * 1843 * Lookup an object and ensure its type matches the link property type. This 1844 * is similar to object_resolve_path() except type verification against the 1845 * link property is performed. 1846 * 1847 * Returns: The matched object or NULL on path lookup failures. 1848 */ 1849 static Object *object_resolve_link(Object *obj, const char *name, 1850 const char *path, Error **errp) 1851 { 1852 const char *type; 1853 char *target_type; 1854 bool ambiguous = false; 1855 Object *target; 1856 1857 /* Go from link<FOO> to FOO. */ 1858 type = object_property_get_type(obj, name, NULL); 1859 target_type = g_strndup(&type[5], strlen(type) - 6); 1860 target = object_resolve_path_type(path, target_type, &ambiguous); 1861 1862 if (ambiguous) { 1863 error_setg(errp, "Path '%s' does not uniquely identify an object", 1864 path); 1865 } else if (!target) { 1866 target = object_resolve_path(path, &ambiguous); 1867 if (target || ambiguous) { 1868 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1869 } else { 1870 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1871 "Device '%s' not found", path); 1872 } 1873 target = NULL; 1874 } 1875 g_free(target_type); 1876 1877 return target; 1878 } 1879 1880 static void object_set_link_property(Object *obj, Visitor *v, 1881 const char *name, void *opaque, 1882 Error **errp) 1883 { 1884 Error *local_err = NULL; 1885 LinkProperty *prop = opaque; 1886 Object **targetp = object_link_get_targetp(obj, prop); 1887 Object *old_target = *targetp; 1888 Object *new_target; 1889 char *path = NULL; 1890 1891 if (!visit_type_str(v, name, &path, errp)) { 1892 return; 1893 } 1894 1895 if (*path) { 1896 new_target = object_resolve_link(obj, name, path, errp); 1897 if (!new_target) { 1898 g_free(path); 1899 return; 1900 } 1901 } else { 1902 new_target = NULL; 1903 } 1904 1905 g_free(path); 1906 1907 prop->check(obj, name, new_target, &local_err); 1908 if (local_err) { 1909 error_propagate(errp, local_err); 1910 return; 1911 } 1912 1913 *targetp = new_target; 1914 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1915 object_ref(new_target); 1916 object_unref(old_target); 1917 } 1918 } 1919 1920 static Object *object_resolve_link_property(Object *parent, void *opaque, 1921 const char *part) 1922 { 1923 LinkProperty *lprop = opaque; 1924 1925 return *object_link_get_targetp(parent, lprop); 1926 } 1927 1928 static void object_release_link_property(Object *obj, const char *name, 1929 void *opaque) 1930 { 1931 LinkProperty *prop = opaque; 1932 Object **targetp = object_link_get_targetp(obj, prop); 1933 1934 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1935 object_unref(*targetp); 1936 } 1937 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1938 g_free(prop); 1939 } 1940 } 1941 1942 static ObjectProperty * 1943 object_add_link_prop(Object *obj, const char *name, 1944 const char *type, void *ptr, 1945 void (*check)(const Object *, const char *, 1946 Object *, Error **), 1947 ObjectPropertyLinkFlags flags) 1948 { 1949 LinkProperty *prop = g_malloc(sizeof(*prop)); 1950 g_autofree char *full_type = NULL; 1951 ObjectProperty *op; 1952 1953 if (flags & OBJ_PROP_LINK_DIRECT) { 1954 prop->target = ptr; 1955 } else { 1956 prop->targetp = ptr; 1957 } 1958 prop->check = check; 1959 prop->flags = flags; 1960 1961 full_type = g_strdup_printf("link<%s>", type); 1962 1963 op = object_property_add(obj, name, full_type, 1964 object_get_link_property, 1965 check ? object_set_link_property : NULL, 1966 object_release_link_property, 1967 prop); 1968 op->resolve = object_resolve_link_property; 1969 return op; 1970 } 1971 1972 ObjectProperty * 1973 object_property_add_link(Object *obj, const char *name, 1974 const char *type, Object **targetp, 1975 void (*check)(const Object *, const char *, 1976 Object *, Error **), 1977 ObjectPropertyLinkFlags flags) 1978 { 1979 return object_add_link_prop(obj, name, type, targetp, check, flags); 1980 } 1981 1982 ObjectProperty * 1983 object_class_property_add_link(ObjectClass *oc, 1984 const char *name, 1985 const char *type, ptrdiff_t offset, 1986 void (*check)(const Object *obj, const char *name, 1987 Object *val, Error **errp), 1988 ObjectPropertyLinkFlags flags) 1989 { 1990 LinkProperty *prop = g_new0(LinkProperty, 1); 1991 char *full_type; 1992 ObjectProperty *op; 1993 1994 prop->offset = offset; 1995 prop->check = check; 1996 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1997 1998 full_type = g_strdup_printf("link<%s>", type); 1999 2000 op = object_class_property_add(oc, name, full_type, 2001 object_get_link_property, 2002 check ? object_set_link_property : NULL, 2003 object_release_link_property, 2004 prop); 2005 2006 op->resolve = object_resolve_link_property; 2007 2008 g_free(full_type); 2009 return op; 2010 } 2011 2012 ObjectProperty * 2013 object_property_add_const_link(Object *obj, const char *name, 2014 Object *target) 2015 { 2016 return object_add_link_prop(obj, name, 2017 object_get_typename(target), target, 2018 NULL, OBJ_PROP_LINK_DIRECT); 2019 } 2020 2021 const char *object_get_canonical_path_component(const Object *obj) 2022 { 2023 ObjectProperty *prop = NULL; 2024 GHashTableIter iter; 2025 2026 if (obj->parent == NULL) { 2027 return NULL; 2028 } 2029 2030 g_hash_table_iter_init(&iter, obj->parent->properties); 2031 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2032 if (!object_property_is_child(prop)) { 2033 continue; 2034 } 2035 2036 if (prop->opaque == obj) { 2037 return prop->name; 2038 } 2039 } 2040 2041 /* obj had a parent but was not a child, should never happen */ 2042 g_assert_not_reached(); 2043 return NULL; 2044 } 2045 2046 char *object_get_canonical_path(const Object *obj) 2047 { 2048 Object *root = object_get_root(); 2049 char *newpath, *path = NULL; 2050 2051 if (obj == root) { 2052 return g_strdup("/"); 2053 } 2054 2055 do { 2056 const char *component = object_get_canonical_path_component(obj); 2057 2058 if (!component) { 2059 /* A canonical path must be complete, so discard what was 2060 * collected so far. 2061 */ 2062 g_free(path); 2063 return NULL; 2064 } 2065 2066 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 2067 g_free(path); 2068 path = newpath; 2069 obj = obj->parent; 2070 } while (obj != root); 2071 2072 return path; 2073 } 2074 2075 Object *object_resolve_path_component(Object *parent, const char *part) 2076 { 2077 ObjectProperty *prop = object_property_find(parent, part); 2078 if (prop == NULL) { 2079 return NULL; 2080 } 2081 2082 if (prop->resolve) { 2083 return prop->resolve(parent, prop->opaque, part); 2084 } else { 2085 return NULL; 2086 } 2087 } 2088 2089 static Object *object_resolve_abs_path(Object *parent, 2090 char **parts, 2091 const char *typename) 2092 { 2093 Object *child; 2094 2095 if (*parts == NULL) { 2096 return object_dynamic_cast(parent, typename); 2097 } 2098 2099 if (strcmp(*parts, "") == 0) { 2100 return object_resolve_abs_path(parent, parts + 1, typename); 2101 } 2102 2103 child = object_resolve_path_component(parent, *parts); 2104 if (!child) { 2105 return NULL; 2106 } 2107 2108 return object_resolve_abs_path(child, parts + 1, typename); 2109 } 2110 2111 static Object *object_resolve_partial_path(Object *parent, 2112 char **parts, 2113 const char *typename, 2114 bool *ambiguous) 2115 { 2116 Object *obj; 2117 GHashTableIter iter; 2118 ObjectProperty *prop; 2119 2120 obj = object_resolve_abs_path(parent, parts, typename); 2121 2122 g_hash_table_iter_init(&iter, parent->properties); 2123 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2124 Object *found; 2125 2126 if (!object_property_is_child(prop)) { 2127 continue; 2128 } 2129 2130 found = object_resolve_partial_path(prop->opaque, parts, 2131 typename, ambiguous); 2132 if (found) { 2133 if (obj) { 2134 *ambiguous = true; 2135 return NULL; 2136 } 2137 obj = found; 2138 } 2139 2140 if (*ambiguous) { 2141 return NULL; 2142 } 2143 } 2144 2145 return obj; 2146 } 2147 2148 Object *object_resolve_path_type(const char *path, const char *typename, 2149 bool *ambiguousp) 2150 { 2151 Object *obj; 2152 char **parts; 2153 2154 parts = g_strsplit(path, "/", 0); 2155 assert(parts); 2156 2157 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2158 bool ambiguous = false; 2159 obj = object_resolve_partial_path(object_get_root(), parts, 2160 typename, &ambiguous); 2161 if (ambiguousp) { 2162 *ambiguousp = ambiguous; 2163 } 2164 } else { 2165 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2166 } 2167 2168 g_strfreev(parts); 2169 2170 return obj; 2171 } 2172 2173 Object *object_resolve_path(const char *path, bool *ambiguous) 2174 { 2175 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2176 } 2177 2178 Object *object_resolve_path_at(Object *parent, const char *path) 2179 { 2180 g_auto(GStrv) parts = g_strsplit(path, "/", 0); 2181 2182 if (*path == '/') { 2183 return object_resolve_abs_path(object_get_root(), parts + 1, 2184 TYPE_OBJECT); 2185 } 2186 return object_resolve_abs_path(parent, parts, TYPE_OBJECT); 2187 } 2188 2189 typedef struct StringProperty 2190 { 2191 char *(*get)(Object *, Error **); 2192 void (*set)(Object *, const char *, Error **); 2193 } StringProperty; 2194 2195 static void property_get_str(Object *obj, Visitor *v, const char *name, 2196 void *opaque, Error **errp) 2197 { 2198 StringProperty *prop = opaque; 2199 char *value; 2200 Error *err = NULL; 2201 2202 value = prop->get(obj, &err); 2203 if (err) { 2204 error_propagate(errp, err); 2205 return; 2206 } 2207 2208 visit_type_str(v, name, &value, errp); 2209 g_free(value); 2210 } 2211 2212 static void property_set_str(Object *obj, Visitor *v, const char *name, 2213 void *opaque, Error **errp) 2214 { 2215 StringProperty *prop = opaque; 2216 char *value; 2217 2218 if (!visit_type_str(v, name, &value, errp)) { 2219 return; 2220 } 2221 2222 prop->set(obj, value, errp); 2223 g_free(value); 2224 } 2225 2226 static void property_release_data(Object *obj, const char *name, 2227 void *opaque) 2228 { 2229 g_free(opaque); 2230 } 2231 2232 ObjectProperty * 2233 object_property_add_str(Object *obj, const char *name, 2234 char *(*get)(Object *, Error **), 2235 void (*set)(Object *, const char *, Error **)) 2236 { 2237 StringProperty *prop = g_malloc0(sizeof(*prop)); 2238 2239 prop->get = get; 2240 prop->set = set; 2241 2242 return object_property_add(obj, name, "string", 2243 get ? property_get_str : NULL, 2244 set ? property_set_str : NULL, 2245 property_release_data, 2246 prop); 2247 } 2248 2249 ObjectProperty * 2250 object_class_property_add_str(ObjectClass *klass, const char *name, 2251 char *(*get)(Object *, Error **), 2252 void (*set)(Object *, const char *, 2253 Error **)) 2254 { 2255 StringProperty *prop = g_malloc0(sizeof(*prop)); 2256 2257 prop->get = get; 2258 prop->set = set; 2259 2260 return object_class_property_add(klass, name, "string", 2261 get ? property_get_str : NULL, 2262 set ? property_set_str : NULL, 2263 NULL, 2264 prop); 2265 } 2266 2267 typedef struct BoolProperty 2268 { 2269 bool (*get)(Object *, Error **); 2270 void (*set)(Object *, bool, Error **); 2271 } BoolProperty; 2272 2273 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2274 void *opaque, Error **errp) 2275 { 2276 BoolProperty *prop = opaque; 2277 bool value; 2278 Error *err = NULL; 2279 2280 value = prop->get(obj, &err); 2281 if (err) { 2282 error_propagate(errp, err); 2283 return; 2284 } 2285 2286 visit_type_bool(v, name, &value, errp); 2287 } 2288 2289 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2290 void *opaque, Error **errp) 2291 { 2292 BoolProperty *prop = opaque; 2293 bool value; 2294 2295 if (!visit_type_bool(v, name, &value, errp)) { 2296 return; 2297 } 2298 2299 prop->set(obj, value, errp); 2300 } 2301 2302 ObjectProperty * 2303 object_property_add_bool(Object *obj, const char *name, 2304 bool (*get)(Object *, Error **), 2305 void (*set)(Object *, bool, Error **)) 2306 { 2307 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2308 2309 prop->get = get; 2310 prop->set = set; 2311 2312 return object_property_add(obj, name, "bool", 2313 get ? property_get_bool : NULL, 2314 set ? property_set_bool : NULL, 2315 property_release_data, 2316 prop); 2317 } 2318 2319 ObjectProperty * 2320 object_class_property_add_bool(ObjectClass *klass, const char *name, 2321 bool (*get)(Object *, Error **), 2322 void (*set)(Object *, bool, Error **)) 2323 { 2324 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2325 2326 prop->get = get; 2327 prop->set = set; 2328 2329 return object_class_property_add(klass, name, "bool", 2330 get ? property_get_bool : NULL, 2331 set ? property_set_bool : NULL, 2332 NULL, 2333 prop); 2334 } 2335 2336 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2337 void *opaque, Error **errp) 2338 { 2339 EnumProperty *prop = opaque; 2340 int value; 2341 Error *err = NULL; 2342 2343 value = prop->get(obj, &err); 2344 if (err) { 2345 error_propagate(errp, err); 2346 return; 2347 } 2348 2349 visit_type_enum(v, name, &value, prop->lookup, errp); 2350 } 2351 2352 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2353 void *opaque, Error **errp) 2354 { 2355 EnumProperty *prop = opaque; 2356 int value; 2357 2358 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) { 2359 return; 2360 } 2361 prop->set(obj, value, errp); 2362 } 2363 2364 ObjectProperty * 2365 object_property_add_enum(Object *obj, const char *name, 2366 const char *typename, 2367 const QEnumLookup *lookup, 2368 int (*get)(Object *, Error **), 2369 void (*set)(Object *, int, Error **)) 2370 { 2371 EnumProperty *prop = g_malloc(sizeof(*prop)); 2372 2373 prop->lookup = lookup; 2374 prop->get = get; 2375 prop->set = set; 2376 2377 return object_property_add(obj, name, typename, 2378 get ? property_get_enum : NULL, 2379 set ? property_set_enum : NULL, 2380 property_release_data, 2381 prop); 2382 } 2383 2384 ObjectProperty * 2385 object_class_property_add_enum(ObjectClass *klass, const char *name, 2386 const char *typename, 2387 const QEnumLookup *lookup, 2388 int (*get)(Object *, Error **), 2389 void (*set)(Object *, int, Error **)) 2390 { 2391 EnumProperty *prop = g_malloc(sizeof(*prop)); 2392 2393 prop->lookup = lookup; 2394 prop->get = get; 2395 prop->set = set; 2396 2397 return object_class_property_add(klass, name, typename, 2398 get ? property_get_enum : NULL, 2399 set ? property_set_enum : NULL, 2400 NULL, 2401 prop); 2402 } 2403 2404 typedef struct TMProperty { 2405 void (*get)(Object *, struct tm *, Error **); 2406 } TMProperty; 2407 2408 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2409 void *opaque, Error **errp) 2410 { 2411 TMProperty *prop = opaque; 2412 Error *err = NULL; 2413 struct tm value; 2414 2415 prop->get(obj, &value, &err); 2416 if (err) { 2417 error_propagate(errp, err); 2418 return; 2419 } 2420 2421 if (!visit_start_struct(v, name, NULL, 0, errp)) { 2422 return; 2423 } 2424 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) { 2425 goto out_end; 2426 } 2427 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) { 2428 goto out_end; 2429 } 2430 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) { 2431 goto out_end; 2432 } 2433 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) { 2434 goto out_end; 2435 } 2436 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) { 2437 goto out_end; 2438 } 2439 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) { 2440 goto out_end; 2441 } 2442 visit_check_struct(v, errp); 2443 out_end: 2444 visit_end_struct(v, NULL); 2445 } 2446 2447 ObjectProperty * 2448 object_property_add_tm(Object *obj, const char *name, 2449 void (*get)(Object *, struct tm *, Error **)) 2450 { 2451 TMProperty *prop = g_malloc0(sizeof(*prop)); 2452 2453 prop->get = get; 2454 2455 return object_property_add(obj, name, "struct tm", 2456 get ? property_get_tm : NULL, NULL, 2457 property_release_data, 2458 prop); 2459 } 2460 2461 ObjectProperty * 2462 object_class_property_add_tm(ObjectClass *klass, const char *name, 2463 void (*get)(Object *, struct tm *, Error **)) 2464 { 2465 TMProperty *prop = g_malloc0(sizeof(*prop)); 2466 2467 prop->get = get; 2468 2469 return object_class_property_add(klass, name, "struct tm", 2470 get ? property_get_tm : NULL, 2471 NULL, NULL, prop); 2472 } 2473 2474 static char *object_get_type(Object *obj, Error **errp) 2475 { 2476 return g_strdup(object_get_typename(obj)); 2477 } 2478 2479 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2480 void *opaque, Error **errp) 2481 { 2482 uint8_t value = *(uint8_t *)opaque; 2483 visit_type_uint8(v, name, &value, errp); 2484 } 2485 2486 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2487 void *opaque, Error **errp) 2488 { 2489 uint8_t *field = opaque; 2490 uint8_t value; 2491 2492 if (!visit_type_uint8(v, name, &value, errp)) { 2493 return; 2494 } 2495 2496 *field = value; 2497 } 2498 2499 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2500 void *opaque, Error **errp) 2501 { 2502 uint16_t value = *(uint16_t *)opaque; 2503 visit_type_uint16(v, name, &value, errp); 2504 } 2505 2506 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2507 void *opaque, Error **errp) 2508 { 2509 uint16_t *field = opaque; 2510 uint16_t value; 2511 2512 if (!visit_type_uint16(v, name, &value, errp)) { 2513 return; 2514 } 2515 2516 *field = value; 2517 } 2518 2519 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2520 void *opaque, Error **errp) 2521 { 2522 uint32_t value = *(uint32_t *)opaque; 2523 visit_type_uint32(v, name, &value, errp); 2524 } 2525 2526 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2527 void *opaque, Error **errp) 2528 { 2529 uint32_t *field = opaque; 2530 uint32_t value; 2531 2532 if (!visit_type_uint32(v, name, &value, errp)) { 2533 return; 2534 } 2535 2536 *field = value; 2537 } 2538 2539 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2540 void *opaque, Error **errp) 2541 { 2542 uint64_t value = *(uint64_t *)opaque; 2543 visit_type_uint64(v, name, &value, errp); 2544 } 2545 2546 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2547 void *opaque, Error **errp) 2548 { 2549 uint64_t *field = opaque; 2550 uint64_t value; 2551 2552 if (!visit_type_uint64(v, name, &value, errp)) { 2553 return; 2554 } 2555 2556 *field = value; 2557 } 2558 2559 ObjectProperty * 2560 object_property_add_uint8_ptr(Object *obj, const char *name, 2561 const uint8_t *v, 2562 ObjectPropertyFlags flags) 2563 { 2564 ObjectPropertyAccessor *getter = NULL; 2565 ObjectPropertyAccessor *setter = NULL; 2566 2567 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2568 getter = property_get_uint8_ptr; 2569 } 2570 2571 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2572 setter = property_set_uint8_ptr; 2573 } 2574 2575 return object_property_add(obj, name, "uint8", 2576 getter, setter, NULL, (void *)v); 2577 } 2578 2579 ObjectProperty * 2580 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2581 const uint8_t *v, 2582 ObjectPropertyFlags flags) 2583 { 2584 ObjectPropertyAccessor *getter = NULL; 2585 ObjectPropertyAccessor *setter = NULL; 2586 2587 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2588 getter = property_get_uint8_ptr; 2589 } 2590 2591 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2592 setter = property_set_uint8_ptr; 2593 } 2594 2595 return object_class_property_add(klass, name, "uint8", 2596 getter, setter, NULL, (void *)v); 2597 } 2598 2599 ObjectProperty * 2600 object_property_add_uint16_ptr(Object *obj, const char *name, 2601 const uint16_t *v, 2602 ObjectPropertyFlags flags) 2603 { 2604 ObjectPropertyAccessor *getter = NULL; 2605 ObjectPropertyAccessor *setter = NULL; 2606 2607 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2608 getter = property_get_uint16_ptr; 2609 } 2610 2611 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2612 setter = property_set_uint16_ptr; 2613 } 2614 2615 return object_property_add(obj, name, "uint16", 2616 getter, setter, NULL, (void *)v); 2617 } 2618 2619 ObjectProperty * 2620 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2621 const uint16_t *v, 2622 ObjectPropertyFlags flags) 2623 { 2624 ObjectPropertyAccessor *getter = NULL; 2625 ObjectPropertyAccessor *setter = NULL; 2626 2627 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2628 getter = property_get_uint16_ptr; 2629 } 2630 2631 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2632 setter = property_set_uint16_ptr; 2633 } 2634 2635 return object_class_property_add(klass, name, "uint16", 2636 getter, setter, NULL, (void *)v); 2637 } 2638 2639 ObjectProperty * 2640 object_property_add_uint32_ptr(Object *obj, const char *name, 2641 const uint32_t *v, 2642 ObjectPropertyFlags flags) 2643 { 2644 ObjectPropertyAccessor *getter = NULL; 2645 ObjectPropertyAccessor *setter = NULL; 2646 2647 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2648 getter = property_get_uint32_ptr; 2649 } 2650 2651 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2652 setter = property_set_uint32_ptr; 2653 } 2654 2655 return object_property_add(obj, name, "uint32", 2656 getter, setter, NULL, (void *)v); 2657 } 2658 2659 ObjectProperty * 2660 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2661 const uint32_t *v, 2662 ObjectPropertyFlags flags) 2663 { 2664 ObjectPropertyAccessor *getter = NULL; 2665 ObjectPropertyAccessor *setter = NULL; 2666 2667 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2668 getter = property_get_uint32_ptr; 2669 } 2670 2671 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2672 setter = property_set_uint32_ptr; 2673 } 2674 2675 return object_class_property_add(klass, name, "uint32", 2676 getter, setter, NULL, (void *)v); 2677 } 2678 2679 ObjectProperty * 2680 object_property_add_uint64_ptr(Object *obj, const char *name, 2681 const uint64_t *v, 2682 ObjectPropertyFlags flags) 2683 { 2684 ObjectPropertyAccessor *getter = NULL; 2685 ObjectPropertyAccessor *setter = NULL; 2686 2687 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2688 getter = property_get_uint64_ptr; 2689 } 2690 2691 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2692 setter = property_set_uint64_ptr; 2693 } 2694 2695 return object_property_add(obj, name, "uint64", 2696 getter, setter, NULL, (void *)v); 2697 } 2698 2699 ObjectProperty * 2700 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2701 const uint64_t *v, 2702 ObjectPropertyFlags flags) 2703 { 2704 ObjectPropertyAccessor *getter = NULL; 2705 ObjectPropertyAccessor *setter = NULL; 2706 2707 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2708 getter = property_get_uint64_ptr; 2709 } 2710 2711 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2712 setter = property_set_uint64_ptr; 2713 } 2714 2715 return object_class_property_add(klass, name, "uint64", 2716 getter, setter, NULL, (void *)v); 2717 } 2718 2719 typedef struct { 2720 Object *target_obj; 2721 char *target_name; 2722 } AliasProperty; 2723 2724 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2725 void *opaque, Error **errp) 2726 { 2727 AliasProperty *prop = opaque; 2728 Visitor *alias_v = visitor_forward_field(v, prop->target_name, name); 2729 2730 object_property_get(prop->target_obj, prop->target_name, alias_v, errp); 2731 visit_free(alias_v); 2732 } 2733 2734 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2735 void *opaque, Error **errp) 2736 { 2737 AliasProperty *prop = opaque; 2738 Visitor *alias_v = visitor_forward_field(v, prop->target_name, name); 2739 2740 object_property_set(prop->target_obj, prop->target_name, alias_v, errp); 2741 visit_free(alias_v); 2742 } 2743 2744 static Object *property_resolve_alias(Object *obj, void *opaque, 2745 const char *part) 2746 { 2747 AliasProperty *prop = opaque; 2748 2749 return object_resolve_path_component(prop->target_obj, prop->target_name); 2750 } 2751 2752 static void property_release_alias(Object *obj, const char *name, void *opaque) 2753 { 2754 AliasProperty *prop = opaque; 2755 2756 g_free(prop->target_name); 2757 g_free(prop); 2758 } 2759 2760 ObjectProperty * 2761 object_property_add_alias(Object *obj, const char *name, 2762 Object *target_obj, const char *target_name) 2763 { 2764 AliasProperty *prop; 2765 ObjectProperty *op; 2766 ObjectProperty *target_prop; 2767 g_autofree char *prop_type = NULL; 2768 2769 target_prop = object_property_find_err(target_obj, target_name, 2770 &error_abort); 2771 2772 if (object_property_is_child(target_prop)) { 2773 prop_type = g_strdup_printf("link%s", 2774 target_prop->type + strlen("child")); 2775 } else { 2776 prop_type = g_strdup(target_prop->type); 2777 } 2778 2779 prop = g_malloc(sizeof(*prop)); 2780 prop->target_obj = target_obj; 2781 prop->target_name = g_strdup(target_name); 2782 2783 op = object_property_add(obj, name, prop_type, 2784 property_get_alias, 2785 property_set_alias, 2786 property_release_alias, 2787 prop); 2788 op->resolve = property_resolve_alias; 2789 if (target_prop->defval) { 2790 op->defval = qobject_ref(target_prop->defval); 2791 } 2792 2793 object_property_set_description(obj, op->name, 2794 target_prop->description); 2795 return op; 2796 } 2797 2798 void object_property_set_description(Object *obj, const char *name, 2799 const char *description) 2800 { 2801 ObjectProperty *op; 2802 2803 op = object_property_find_err(obj, name, &error_abort); 2804 g_free(op->description); 2805 op->description = g_strdup(description); 2806 } 2807 2808 void object_class_property_set_description(ObjectClass *klass, 2809 const char *name, 2810 const char *description) 2811 { 2812 ObjectProperty *op; 2813 2814 op = g_hash_table_lookup(klass->properties, name); 2815 g_free(op->description); 2816 op->description = g_strdup(description); 2817 } 2818 2819 static void object_class_init(ObjectClass *klass, void *data) 2820 { 2821 object_class_property_add_str(klass, "type", object_get_type, 2822 NULL); 2823 } 2824 2825 static void register_types(void) 2826 { 2827 static const TypeInfo interface_info = { 2828 .name = TYPE_INTERFACE, 2829 .class_size = sizeof(InterfaceClass), 2830 .abstract = true, 2831 }; 2832 2833 static const TypeInfo object_info = { 2834 .name = TYPE_OBJECT, 2835 .instance_size = sizeof(Object), 2836 .class_init = object_class_init, 2837 .abstract = true, 2838 }; 2839 2840 type_interface = type_register_internal(&interface_info); 2841 type_register_internal(&object_info); 2842 } 2843 2844 type_init(register_types) 2845