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