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