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