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