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 *module_object_class_by_name(const char *typename) 989 { 990 ObjectClass *oc; 991 992 oc = object_class_by_name(typename); 993 #ifdef CONFIG_MODULES 994 if (!oc) { 995 module_load_qom_one(typename); 996 oc = object_class_by_name(typename); 997 } 998 #endif 999 return oc; 1000 } 1001 1002 ObjectClass *object_class_get_parent(ObjectClass *class) 1003 { 1004 TypeImpl *type = type_get_parent(class->type); 1005 1006 if (!type) { 1007 return NULL; 1008 } 1009 1010 type_initialize(type); 1011 1012 return type->class; 1013 } 1014 1015 typedef struct OCFData 1016 { 1017 void (*fn)(ObjectClass *klass, void *opaque); 1018 const char *implements_type; 1019 bool include_abstract; 1020 void *opaque; 1021 } OCFData; 1022 1023 static void object_class_foreach_tramp(gpointer key, gpointer value, 1024 gpointer opaque) 1025 { 1026 OCFData *data = opaque; 1027 TypeImpl *type = value; 1028 ObjectClass *k; 1029 1030 type_initialize(type); 1031 k = type->class; 1032 1033 if (!data->include_abstract && type->abstract) { 1034 return; 1035 } 1036 1037 if (data->implements_type && 1038 !object_class_dynamic_cast(k, data->implements_type)) { 1039 return; 1040 } 1041 1042 data->fn(k, data->opaque); 1043 } 1044 1045 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque), 1046 const char *implements_type, bool include_abstract, 1047 void *opaque) 1048 { 1049 OCFData data = { fn, implements_type, include_abstract, opaque }; 1050 1051 enumerating_types = true; 1052 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data); 1053 enumerating_types = false; 1054 } 1055 1056 static int do_object_child_foreach(Object *obj, 1057 int (*fn)(Object *child, void *opaque), 1058 void *opaque, bool recurse) 1059 { 1060 GHashTableIter iter; 1061 ObjectProperty *prop; 1062 int ret = 0; 1063 1064 g_hash_table_iter_init(&iter, obj->properties); 1065 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1066 if (object_property_is_child(prop)) { 1067 Object *child = prop->opaque; 1068 1069 ret = fn(child, opaque); 1070 if (ret != 0) { 1071 break; 1072 } 1073 if (recurse) { 1074 ret = do_object_child_foreach(child, fn, opaque, true); 1075 if (ret != 0) { 1076 break; 1077 } 1078 } 1079 } 1080 } 1081 return ret; 1082 } 1083 1084 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque), 1085 void *opaque) 1086 { 1087 return do_object_child_foreach(obj, fn, opaque, false); 1088 } 1089 1090 int object_child_foreach_recursive(Object *obj, 1091 int (*fn)(Object *child, void *opaque), 1092 void *opaque) 1093 { 1094 return do_object_child_foreach(obj, fn, opaque, true); 1095 } 1096 1097 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque) 1098 { 1099 GSList **list = opaque; 1100 1101 *list = g_slist_prepend(*list, klass); 1102 } 1103 1104 GSList *object_class_get_list(const char *implements_type, 1105 bool include_abstract) 1106 { 1107 GSList *list = NULL; 1108 1109 object_class_foreach(object_class_get_list_tramp, 1110 implements_type, include_abstract, &list); 1111 return list; 1112 } 1113 1114 static gint object_class_cmp(gconstpointer a, gconstpointer b) 1115 { 1116 return strcasecmp(object_class_get_name((ObjectClass *)a), 1117 object_class_get_name((ObjectClass *)b)); 1118 } 1119 1120 GSList *object_class_get_list_sorted(const char *implements_type, 1121 bool include_abstract) 1122 { 1123 return g_slist_sort(object_class_get_list(implements_type, include_abstract), 1124 object_class_cmp); 1125 } 1126 1127 Object *object_ref(Object *obj) 1128 { 1129 if (!obj) { 1130 return NULL; 1131 } 1132 atomic_inc(&obj->ref); 1133 return obj; 1134 } 1135 1136 void object_unref(Object *obj) 1137 { 1138 if (!obj) { 1139 return; 1140 } 1141 g_assert(obj->ref > 0); 1142 1143 /* parent always holds a reference to its children */ 1144 if (atomic_fetch_dec(&obj->ref) == 1) { 1145 object_finalize(obj); 1146 } 1147 } 1148 1149 static ObjectProperty * 1150 object_property_try_add(Object *obj, const char *name, const char *type, 1151 ObjectPropertyAccessor *get, 1152 ObjectPropertyAccessor *set, 1153 ObjectPropertyRelease *release, 1154 void *opaque, Error **errp) 1155 { 1156 ObjectProperty *prop; 1157 size_t name_len = strlen(name); 1158 1159 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) { 1160 int i; 1161 ObjectProperty *ret; 1162 char *name_no_array = g_strdup(name); 1163 1164 name_no_array[name_len - 3] = '\0'; 1165 for (i = 0; ; ++i) { 1166 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i); 1167 1168 ret = object_property_try_add(obj, full_name, type, get, set, 1169 release, opaque, NULL); 1170 g_free(full_name); 1171 if (ret) { 1172 break; 1173 } 1174 } 1175 g_free(name_no_array); 1176 return ret; 1177 } 1178 1179 if (object_property_find(obj, name, NULL) != NULL) { 1180 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')", 1181 name, object_get_typename(obj)); 1182 return NULL; 1183 } 1184 1185 prop = g_malloc0(sizeof(*prop)); 1186 1187 prop->name = g_strdup(name); 1188 prop->type = g_strdup(type); 1189 1190 prop->get = get; 1191 prop->set = set; 1192 prop->release = release; 1193 prop->opaque = opaque; 1194 1195 g_hash_table_insert(obj->properties, prop->name, prop); 1196 return prop; 1197 } 1198 1199 ObjectProperty * 1200 object_property_add(Object *obj, const char *name, const char *type, 1201 ObjectPropertyAccessor *get, 1202 ObjectPropertyAccessor *set, 1203 ObjectPropertyRelease *release, 1204 void *opaque) 1205 { 1206 return object_property_try_add(obj, name, type, get, set, release, 1207 opaque, &error_abort); 1208 } 1209 1210 ObjectProperty * 1211 object_class_property_add(ObjectClass *klass, 1212 const char *name, 1213 const char *type, 1214 ObjectPropertyAccessor *get, 1215 ObjectPropertyAccessor *set, 1216 ObjectPropertyRelease *release, 1217 void *opaque) 1218 { 1219 ObjectProperty *prop; 1220 1221 assert(!object_class_property_find(klass, name, NULL)); 1222 1223 prop = g_malloc0(sizeof(*prop)); 1224 1225 prop->name = g_strdup(name); 1226 prop->type = g_strdup(type); 1227 1228 prop->get = get; 1229 prop->set = set; 1230 prop->release = release; 1231 prop->opaque = opaque; 1232 1233 g_hash_table_insert(klass->properties, prop->name, prop); 1234 1235 return prop; 1236 } 1237 1238 ObjectProperty *object_property_find(Object *obj, const char *name, 1239 Error **errp) 1240 { 1241 ObjectProperty *prop; 1242 ObjectClass *klass = object_get_class(obj); 1243 1244 prop = object_class_property_find(klass, name, NULL); 1245 if (prop) { 1246 return prop; 1247 } 1248 1249 prop = g_hash_table_lookup(obj->properties, name); 1250 if (prop) { 1251 return prop; 1252 } 1253 1254 error_setg(errp, "Property '.%s' not found", name); 1255 return NULL; 1256 } 1257 1258 void object_property_iter_init(ObjectPropertyIterator *iter, 1259 Object *obj) 1260 { 1261 g_hash_table_iter_init(&iter->iter, obj->properties); 1262 iter->nextclass = object_get_class(obj); 1263 } 1264 1265 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter) 1266 { 1267 gpointer key, val; 1268 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) { 1269 if (!iter->nextclass) { 1270 return NULL; 1271 } 1272 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties); 1273 iter->nextclass = object_class_get_parent(iter->nextclass); 1274 } 1275 return val; 1276 } 1277 1278 void object_class_property_iter_init(ObjectPropertyIterator *iter, 1279 ObjectClass *klass) 1280 { 1281 g_hash_table_iter_init(&iter->iter, klass->properties); 1282 iter->nextclass = object_class_get_parent(klass); 1283 } 1284 1285 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name, 1286 Error **errp) 1287 { 1288 ObjectProperty *prop; 1289 ObjectClass *parent_klass; 1290 1291 parent_klass = object_class_get_parent(klass); 1292 if (parent_klass) { 1293 prop = object_class_property_find(parent_klass, name, NULL); 1294 if (prop) { 1295 return prop; 1296 } 1297 } 1298 1299 prop = g_hash_table_lookup(klass->properties, name); 1300 if (!prop) { 1301 error_setg(errp, "Property '.%s' not found", name); 1302 } 1303 return prop; 1304 } 1305 1306 void object_property_del(Object *obj, const char *name) 1307 { 1308 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name); 1309 1310 if (prop->release) { 1311 prop->release(obj, name, prop->opaque); 1312 } 1313 g_hash_table_remove(obj->properties, name); 1314 } 1315 1316 void object_property_get(Object *obj, Visitor *v, const char *name, 1317 Error **errp) 1318 { 1319 ObjectProperty *prop = object_property_find(obj, name, errp); 1320 if (prop == NULL) { 1321 return; 1322 } 1323 1324 if (!prop->get) { 1325 error_setg(errp, QERR_PERMISSION_DENIED); 1326 } else { 1327 prop->get(obj, v, name, prop->opaque, errp); 1328 } 1329 } 1330 1331 void object_property_set(Object *obj, Visitor *v, const char *name, 1332 Error **errp) 1333 { 1334 ObjectProperty *prop = object_property_find(obj, name, errp); 1335 if (prop == NULL) { 1336 return; 1337 } 1338 1339 if (!prop->set) { 1340 error_setg(errp, QERR_PERMISSION_DENIED); 1341 } else { 1342 prop->set(obj, v, name, prop->opaque, errp); 1343 } 1344 } 1345 1346 void object_property_set_str(Object *obj, const char *value, 1347 const char *name, Error **errp) 1348 { 1349 QString *qstr = qstring_from_str(value); 1350 object_property_set_qobject(obj, QOBJECT(qstr), name, errp); 1351 1352 qobject_unref(qstr); 1353 } 1354 1355 char *object_property_get_str(Object *obj, const char *name, 1356 Error **errp) 1357 { 1358 QObject *ret = object_property_get_qobject(obj, name, errp); 1359 char *retval; 1360 1361 if (!ret) { 1362 return NULL; 1363 } 1364 1365 retval = g_strdup(qobject_get_try_str(ret)); 1366 if (!retval) { 1367 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string"); 1368 } 1369 1370 qobject_unref(ret); 1371 return retval; 1372 } 1373 1374 void object_property_set_link(Object *obj, Object *value, 1375 const char *name, Error **errp) 1376 { 1377 if (value) { 1378 char *path = object_get_canonical_path(value); 1379 object_property_set_str(obj, path, name, errp); 1380 g_free(path); 1381 } else { 1382 object_property_set_str(obj, "", name, errp); 1383 } 1384 } 1385 1386 Object *object_property_get_link(Object *obj, const char *name, 1387 Error **errp) 1388 { 1389 char *str = object_property_get_str(obj, name, errp); 1390 Object *target = NULL; 1391 1392 if (str && *str) { 1393 target = object_resolve_path(str, NULL); 1394 if (!target) { 1395 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1396 "Device '%s' not found", str); 1397 } 1398 } 1399 1400 g_free(str); 1401 return target; 1402 } 1403 1404 void object_property_set_bool(Object *obj, bool value, 1405 const char *name, Error **errp) 1406 { 1407 QBool *qbool = qbool_from_bool(value); 1408 object_property_set_qobject(obj, QOBJECT(qbool), name, errp); 1409 1410 qobject_unref(qbool); 1411 } 1412 1413 bool object_property_get_bool(Object *obj, const char *name, 1414 Error **errp) 1415 { 1416 QObject *ret = object_property_get_qobject(obj, name, errp); 1417 QBool *qbool; 1418 bool retval; 1419 1420 if (!ret) { 1421 return false; 1422 } 1423 qbool = qobject_to(QBool, ret); 1424 if (!qbool) { 1425 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean"); 1426 retval = false; 1427 } else { 1428 retval = qbool_get_bool(qbool); 1429 } 1430 1431 qobject_unref(ret); 1432 return retval; 1433 } 1434 1435 void object_property_set_int(Object *obj, int64_t value, 1436 const char *name, Error **errp) 1437 { 1438 QNum *qnum = qnum_from_int(value); 1439 object_property_set_qobject(obj, QOBJECT(qnum), name, errp); 1440 1441 qobject_unref(qnum); 1442 } 1443 1444 int64_t object_property_get_int(Object *obj, const char *name, 1445 Error **errp) 1446 { 1447 QObject *ret = object_property_get_qobject(obj, name, errp); 1448 QNum *qnum; 1449 int64_t retval; 1450 1451 if (!ret) { 1452 return -1; 1453 } 1454 1455 qnum = qobject_to(QNum, ret); 1456 if (!qnum || !qnum_get_try_int(qnum, &retval)) { 1457 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int"); 1458 retval = -1; 1459 } 1460 1461 qobject_unref(ret); 1462 return retval; 1463 } 1464 1465 static void object_property_init_defval(Object *obj, ObjectProperty *prop) 1466 { 1467 Visitor *v = qobject_input_visitor_new(prop->defval); 1468 1469 assert(prop->set != NULL); 1470 prop->set(obj, v, prop->name, prop->opaque, &error_abort); 1471 1472 visit_free(v); 1473 } 1474 1475 static void object_property_set_default(ObjectProperty *prop, QObject *defval) 1476 { 1477 assert(!prop->defval); 1478 assert(!prop->init); 1479 1480 prop->defval = defval; 1481 prop->init = object_property_init_defval; 1482 } 1483 1484 void object_property_set_default_bool(ObjectProperty *prop, bool value) 1485 { 1486 object_property_set_default(prop, QOBJECT(qbool_from_bool(value))); 1487 } 1488 1489 void object_property_set_default_str(ObjectProperty *prop, const char *value) 1490 { 1491 object_property_set_default(prop, QOBJECT(qstring_from_str(value))); 1492 } 1493 1494 void object_property_set_default_int(ObjectProperty *prop, int64_t value) 1495 { 1496 object_property_set_default(prop, QOBJECT(qnum_from_int(value))); 1497 } 1498 1499 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value) 1500 { 1501 object_property_set_default(prop, QOBJECT(qnum_from_uint(value))); 1502 } 1503 1504 void object_property_set_uint(Object *obj, uint64_t value, 1505 const char *name, Error **errp) 1506 { 1507 QNum *qnum = qnum_from_uint(value); 1508 1509 object_property_set_qobject(obj, QOBJECT(qnum), name, errp); 1510 qobject_unref(qnum); 1511 } 1512 1513 uint64_t object_property_get_uint(Object *obj, const char *name, 1514 Error **errp) 1515 { 1516 QObject *ret = object_property_get_qobject(obj, name, errp); 1517 QNum *qnum; 1518 uint64_t retval; 1519 1520 if (!ret) { 1521 return 0; 1522 } 1523 qnum = qobject_to(QNum, ret); 1524 if (!qnum || !qnum_get_try_uint(qnum, &retval)) { 1525 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint"); 1526 retval = 0; 1527 } 1528 1529 qobject_unref(ret); 1530 return retval; 1531 } 1532 1533 typedef struct EnumProperty { 1534 const QEnumLookup *lookup; 1535 int (*get)(Object *, Error **); 1536 void (*set)(Object *, int, Error **); 1537 } EnumProperty; 1538 1539 int object_property_get_enum(Object *obj, const char *name, 1540 const char *typename, Error **errp) 1541 { 1542 char *str; 1543 int ret; 1544 ObjectProperty *prop = object_property_find(obj, name, errp); 1545 EnumProperty *enumprop; 1546 1547 if (prop == NULL) { 1548 return 0; 1549 } 1550 1551 if (!g_str_equal(prop->type, typename)) { 1552 error_setg(errp, "Property %s on %s is not '%s' enum type", 1553 name, object_class_get_name( 1554 object_get_class(obj)), typename); 1555 return 0; 1556 } 1557 1558 enumprop = prop->opaque; 1559 1560 str = object_property_get_str(obj, name, errp); 1561 if (!str) { 1562 return 0; 1563 } 1564 1565 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp); 1566 g_free(str); 1567 1568 return ret; 1569 } 1570 1571 void object_property_parse(Object *obj, const char *string, 1572 const char *name, Error **errp) 1573 { 1574 Visitor *v = string_input_visitor_new(string); 1575 object_property_set(obj, v, name, errp); 1576 visit_free(v); 1577 } 1578 1579 char *object_property_print(Object *obj, const char *name, bool human, 1580 Error **errp) 1581 { 1582 Visitor *v; 1583 char *string = NULL; 1584 Error *local_err = NULL; 1585 1586 v = string_output_visitor_new(human, &string); 1587 object_property_get(obj, v, name, &local_err); 1588 if (local_err) { 1589 error_propagate(errp, local_err); 1590 goto out; 1591 } 1592 1593 visit_complete(v, &string); 1594 1595 out: 1596 visit_free(v); 1597 return string; 1598 } 1599 1600 const char *object_property_get_type(Object *obj, const char *name, Error **errp) 1601 { 1602 ObjectProperty *prop = object_property_find(obj, name, errp); 1603 if (prop == NULL) { 1604 return NULL; 1605 } 1606 1607 return prop->type; 1608 } 1609 1610 Object *object_get_root(void) 1611 { 1612 static Object *root; 1613 1614 if (!root) { 1615 root = object_new("container"); 1616 } 1617 1618 return root; 1619 } 1620 1621 Object *object_get_objects_root(void) 1622 { 1623 return container_get(object_get_root(), "/objects"); 1624 } 1625 1626 Object *object_get_internal_root(void) 1627 { 1628 static Object *internal_root; 1629 1630 if (!internal_root) { 1631 internal_root = object_new("container"); 1632 } 1633 1634 return internal_root; 1635 } 1636 1637 static void object_get_child_property(Object *obj, Visitor *v, 1638 const char *name, void *opaque, 1639 Error **errp) 1640 { 1641 Object *child = opaque; 1642 char *path; 1643 1644 path = object_get_canonical_path(child); 1645 visit_type_str(v, name, &path, errp); 1646 g_free(path); 1647 } 1648 1649 static Object *object_resolve_child_property(Object *parent, void *opaque, 1650 const char *part) 1651 { 1652 return opaque; 1653 } 1654 1655 static void object_finalize_child_property(Object *obj, const char *name, 1656 void *opaque) 1657 { 1658 Object *child = opaque; 1659 1660 if (child->class->unparent) { 1661 (child->class->unparent)(child); 1662 } 1663 child->parent = NULL; 1664 object_unref(child); 1665 } 1666 1667 ObjectProperty * 1668 object_property_add_child(Object *obj, const char *name, 1669 Object *child) 1670 { 1671 g_autofree char *type = NULL; 1672 ObjectProperty *op; 1673 1674 assert(!child->parent); 1675 1676 type = g_strdup_printf("child<%s>", object_get_typename(child)); 1677 1678 op = object_property_add(obj, name, type, object_get_child_property, NULL, 1679 object_finalize_child_property, child); 1680 op->resolve = object_resolve_child_property; 1681 object_ref(child); 1682 child->parent = obj; 1683 return op; 1684 } 1685 1686 void object_property_allow_set_link(const Object *obj, const char *name, 1687 Object *val, Error **errp) 1688 { 1689 /* Allow the link to be set, always */ 1690 } 1691 1692 typedef struct { 1693 union { 1694 Object **targetp; 1695 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 1696 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */ 1697 }; 1698 void (*check)(const Object *, const char *, Object *, Error **); 1699 ObjectPropertyLinkFlags flags; 1700 } LinkProperty; 1701 1702 static Object ** 1703 object_link_get_targetp(Object *obj, LinkProperty *lprop) 1704 { 1705 if (lprop->flags & OBJ_PROP_LINK_DIRECT) { 1706 return &lprop->target; 1707 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) { 1708 return (void *)obj + lprop->offset; 1709 } else { 1710 return lprop->targetp; 1711 } 1712 } 1713 1714 static void object_get_link_property(Object *obj, Visitor *v, 1715 const char *name, void *opaque, 1716 Error **errp) 1717 { 1718 LinkProperty *lprop = opaque; 1719 Object **targetp = object_link_get_targetp(obj, lprop); 1720 char *path; 1721 1722 if (*targetp) { 1723 path = object_get_canonical_path(*targetp); 1724 visit_type_str(v, name, &path, errp); 1725 g_free(path); 1726 } else { 1727 path = (char *)""; 1728 visit_type_str(v, name, &path, errp); 1729 } 1730 } 1731 1732 /* 1733 * object_resolve_link: 1734 * 1735 * Lookup an object and ensure its type matches the link property type. This 1736 * is similar to object_resolve_path() except type verification against the 1737 * link property is performed. 1738 * 1739 * Returns: The matched object or NULL on path lookup failures. 1740 */ 1741 static Object *object_resolve_link(Object *obj, const char *name, 1742 const char *path, Error **errp) 1743 { 1744 const char *type; 1745 char *target_type; 1746 bool ambiguous = false; 1747 Object *target; 1748 1749 /* Go from link<FOO> to FOO. */ 1750 type = object_property_get_type(obj, name, NULL); 1751 target_type = g_strndup(&type[5], strlen(type) - 6); 1752 target = object_resolve_path_type(path, target_type, &ambiguous); 1753 1754 if (ambiguous) { 1755 error_setg(errp, "Path '%s' does not uniquely identify an object", 1756 path); 1757 } else if (!target) { 1758 target = object_resolve_path(path, &ambiguous); 1759 if (target || ambiguous) { 1760 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type); 1761 } else { 1762 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1763 "Device '%s' not found", path); 1764 } 1765 target = NULL; 1766 } 1767 g_free(target_type); 1768 1769 return target; 1770 } 1771 1772 static void object_set_link_property(Object *obj, Visitor *v, 1773 const char *name, void *opaque, 1774 Error **errp) 1775 { 1776 Error *local_err = NULL; 1777 LinkProperty *prop = opaque; 1778 Object **targetp = object_link_get_targetp(obj, prop); 1779 Object *old_target = *targetp; 1780 Object *new_target = NULL; 1781 char *path = NULL; 1782 1783 visit_type_str(v, name, &path, &local_err); 1784 1785 if (!local_err && strcmp(path, "") != 0) { 1786 new_target = object_resolve_link(obj, name, path, &local_err); 1787 } 1788 1789 g_free(path); 1790 if (local_err) { 1791 error_propagate(errp, local_err); 1792 return; 1793 } 1794 1795 prop->check(obj, name, new_target, &local_err); 1796 if (local_err) { 1797 error_propagate(errp, local_err); 1798 return; 1799 } 1800 1801 *targetp = new_target; 1802 if (prop->flags & OBJ_PROP_LINK_STRONG) { 1803 object_ref(new_target); 1804 object_unref(old_target); 1805 } 1806 } 1807 1808 static Object *object_resolve_link_property(Object *parent, void *opaque, 1809 const char *part) 1810 { 1811 LinkProperty *lprop = opaque; 1812 1813 return *object_link_get_targetp(parent, lprop); 1814 } 1815 1816 static void object_release_link_property(Object *obj, const char *name, 1817 void *opaque) 1818 { 1819 LinkProperty *prop = opaque; 1820 Object **targetp = object_link_get_targetp(obj, prop); 1821 1822 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { 1823 object_unref(*targetp); 1824 } 1825 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) { 1826 g_free(prop); 1827 } 1828 } 1829 1830 static ObjectProperty * 1831 object_add_link_prop(Object *obj, const char *name, 1832 const char *type, void *ptr, 1833 void (*check)(const Object *, const char *, 1834 Object *, Error **), 1835 ObjectPropertyLinkFlags flags) 1836 { 1837 LinkProperty *prop = g_malloc(sizeof(*prop)); 1838 g_autofree char *full_type = NULL; 1839 ObjectProperty *op; 1840 1841 if (flags & OBJ_PROP_LINK_DIRECT) { 1842 prop->target = ptr; 1843 } else { 1844 prop->targetp = ptr; 1845 } 1846 prop->check = check; 1847 prop->flags = flags; 1848 1849 full_type = g_strdup_printf("link<%s>", type); 1850 1851 op = object_property_add(obj, name, full_type, 1852 object_get_link_property, 1853 check ? object_set_link_property : NULL, 1854 object_release_link_property, 1855 prop); 1856 op->resolve = object_resolve_link_property; 1857 return op; 1858 } 1859 1860 ObjectProperty * 1861 object_property_add_link(Object *obj, const char *name, 1862 const char *type, Object **targetp, 1863 void (*check)(const Object *, const char *, 1864 Object *, Error **), 1865 ObjectPropertyLinkFlags flags) 1866 { 1867 return object_add_link_prop(obj, name, type, targetp, check, flags); 1868 } 1869 1870 ObjectProperty * 1871 object_class_property_add_link(ObjectClass *oc, 1872 const char *name, 1873 const char *type, ptrdiff_t offset, 1874 void (*check)(const Object *obj, const char *name, 1875 Object *val, Error **errp), 1876 ObjectPropertyLinkFlags flags) 1877 { 1878 LinkProperty *prop = g_new0(LinkProperty, 1); 1879 char *full_type; 1880 ObjectProperty *op; 1881 1882 prop->offset = offset; 1883 prop->check = check; 1884 prop->flags = flags | OBJ_PROP_LINK_CLASS; 1885 1886 full_type = g_strdup_printf("link<%s>", type); 1887 1888 op = object_class_property_add(oc, name, full_type, 1889 object_get_link_property, 1890 check ? object_set_link_property : NULL, 1891 object_release_link_property, 1892 prop); 1893 1894 op->resolve = object_resolve_link_property; 1895 1896 g_free(full_type); 1897 return op; 1898 } 1899 1900 ObjectProperty * 1901 object_property_add_const_link(Object *obj, const char *name, 1902 Object *target) 1903 { 1904 return object_add_link_prop(obj, name, 1905 object_get_typename(target), target, 1906 NULL, OBJ_PROP_LINK_DIRECT); 1907 } 1908 1909 char *object_get_canonical_path_component(const Object *obj) 1910 { 1911 ObjectProperty *prop = NULL; 1912 GHashTableIter iter; 1913 1914 if (obj->parent == NULL) { 1915 return NULL; 1916 } 1917 1918 g_hash_table_iter_init(&iter, obj->parent->properties); 1919 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 1920 if (!object_property_is_child(prop)) { 1921 continue; 1922 } 1923 1924 if (prop->opaque == obj) { 1925 return g_strdup(prop->name); 1926 } 1927 } 1928 1929 /* obj had a parent but was not a child, should never happen */ 1930 g_assert_not_reached(); 1931 return NULL; 1932 } 1933 1934 char *object_get_canonical_path(const Object *obj) 1935 { 1936 Object *root = object_get_root(); 1937 char *newpath, *path = NULL; 1938 1939 if (obj == root) { 1940 return g_strdup("/"); 1941 } 1942 1943 do { 1944 char *component = object_get_canonical_path_component(obj); 1945 1946 if (!component) { 1947 /* A canonical path must be complete, so discard what was 1948 * collected so far. 1949 */ 1950 g_free(path); 1951 return NULL; 1952 } 1953 1954 newpath = g_strdup_printf("/%s%s", component, path ? path : ""); 1955 g_free(path); 1956 g_free(component); 1957 path = newpath; 1958 obj = obj->parent; 1959 } while (obj != root); 1960 1961 return path; 1962 } 1963 1964 Object *object_resolve_path_component(Object *parent, const char *part) 1965 { 1966 ObjectProperty *prop = object_property_find(parent, part, NULL); 1967 if (prop == NULL) { 1968 return NULL; 1969 } 1970 1971 if (prop->resolve) { 1972 return prop->resolve(parent, prop->opaque, part); 1973 } else { 1974 return NULL; 1975 } 1976 } 1977 1978 static Object *object_resolve_abs_path(Object *parent, 1979 char **parts, 1980 const char *typename) 1981 { 1982 Object *child; 1983 1984 if (*parts == NULL) { 1985 return object_dynamic_cast(parent, typename); 1986 } 1987 1988 if (strcmp(*parts, "") == 0) { 1989 return object_resolve_abs_path(parent, parts + 1, typename); 1990 } 1991 1992 child = object_resolve_path_component(parent, *parts); 1993 if (!child) { 1994 return NULL; 1995 } 1996 1997 return object_resolve_abs_path(child, parts + 1, typename); 1998 } 1999 2000 static Object *object_resolve_partial_path(Object *parent, 2001 char **parts, 2002 const char *typename, 2003 bool *ambiguous) 2004 { 2005 Object *obj; 2006 GHashTableIter iter; 2007 ObjectProperty *prop; 2008 2009 obj = object_resolve_abs_path(parent, parts, typename); 2010 2011 g_hash_table_iter_init(&iter, parent->properties); 2012 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) { 2013 Object *found; 2014 2015 if (!object_property_is_child(prop)) { 2016 continue; 2017 } 2018 2019 found = object_resolve_partial_path(prop->opaque, parts, 2020 typename, ambiguous); 2021 if (found) { 2022 if (obj) { 2023 *ambiguous = true; 2024 return NULL; 2025 } 2026 obj = found; 2027 } 2028 2029 if (*ambiguous) { 2030 return NULL; 2031 } 2032 } 2033 2034 return obj; 2035 } 2036 2037 Object *object_resolve_path_type(const char *path, const char *typename, 2038 bool *ambiguousp) 2039 { 2040 Object *obj; 2041 char **parts; 2042 2043 parts = g_strsplit(path, "/", 0); 2044 assert(parts); 2045 2046 if (parts[0] == NULL || strcmp(parts[0], "") != 0) { 2047 bool ambiguous = false; 2048 obj = object_resolve_partial_path(object_get_root(), parts, 2049 typename, &ambiguous); 2050 if (ambiguousp) { 2051 *ambiguousp = ambiguous; 2052 } 2053 } else { 2054 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename); 2055 } 2056 2057 g_strfreev(parts); 2058 2059 return obj; 2060 } 2061 2062 Object *object_resolve_path(const char *path, bool *ambiguous) 2063 { 2064 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); 2065 } 2066 2067 typedef struct StringProperty 2068 { 2069 char *(*get)(Object *, Error **); 2070 void (*set)(Object *, const char *, Error **); 2071 } StringProperty; 2072 2073 static void property_get_str(Object *obj, Visitor *v, const char *name, 2074 void *opaque, Error **errp) 2075 { 2076 StringProperty *prop = opaque; 2077 char *value; 2078 Error *err = NULL; 2079 2080 value = prop->get(obj, &err); 2081 if (err) { 2082 error_propagate(errp, err); 2083 return; 2084 } 2085 2086 visit_type_str(v, name, &value, errp); 2087 g_free(value); 2088 } 2089 2090 static void property_set_str(Object *obj, Visitor *v, const char *name, 2091 void *opaque, Error **errp) 2092 { 2093 StringProperty *prop = opaque; 2094 char *value; 2095 Error *local_err = NULL; 2096 2097 visit_type_str(v, name, &value, &local_err); 2098 if (local_err) { 2099 error_propagate(errp, local_err); 2100 return; 2101 } 2102 2103 prop->set(obj, value, errp); 2104 g_free(value); 2105 } 2106 2107 static void property_release_str(Object *obj, const char *name, 2108 void *opaque) 2109 { 2110 StringProperty *prop = opaque; 2111 g_free(prop); 2112 } 2113 2114 ObjectProperty * 2115 object_property_add_str(Object *obj, const char *name, 2116 char *(*get)(Object *, Error **), 2117 void (*set)(Object *, const char *, Error **)) 2118 { 2119 StringProperty *prop = g_malloc0(sizeof(*prop)); 2120 2121 prop->get = get; 2122 prop->set = set; 2123 2124 return object_property_add(obj, name, "string", 2125 get ? property_get_str : NULL, 2126 set ? property_set_str : NULL, 2127 property_release_str, 2128 prop); 2129 } 2130 2131 ObjectProperty * 2132 object_class_property_add_str(ObjectClass *klass, const char *name, 2133 char *(*get)(Object *, Error **), 2134 void (*set)(Object *, const char *, 2135 Error **)) 2136 { 2137 StringProperty *prop = g_malloc0(sizeof(*prop)); 2138 2139 prop->get = get; 2140 prop->set = set; 2141 2142 return object_class_property_add(klass, name, "string", 2143 get ? property_get_str : NULL, 2144 set ? property_set_str : NULL, 2145 NULL, 2146 prop); 2147 } 2148 2149 typedef struct BoolProperty 2150 { 2151 bool (*get)(Object *, Error **); 2152 void (*set)(Object *, bool, Error **); 2153 } BoolProperty; 2154 2155 static void property_get_bool(Object *obj, Visitor *v, const char *name, 2156 void *opaque, Error **errp) 2157 { 2158 BoolProperty *prop = opaque; 2159 bool value; 2160 Error *err = NULL; 2161 2162 value = prop->get(obj, &err); 2163 if (err) { 2164 error_propagate(errp, err); 2165 return; 2166 } 2167 2168 visit_type_bool(v, name, &value, errp); 2169 } 2170 2171 static void property_set_bool(Object *obj, Visitor *v, const char *name, 2172 void *opaque, Error **errp) 2173 { 2174 BoolProperty *prop = opaque; 2175 bool value; 2176 Error *local_err = NULL; 2177 2178 visit_type_bool(v, name, &value, &local_err); 2179 if (local_err) { 2180 error_propagate(errp, local_err); 2181 return; 2182 } 2183 2184 prop->set(obj, value, errp); 2185 } 2186 2187 static void property_release_bool(Object *obj, const char *name, 2188 void *opaque) 2189 { 2190 BoolProperty *prop = opaque; 2191 g_free(prop); 2192 } 2193 2194 ObjectProperty * 2195 object_property_add_bool(Object *obj, const char *name, 2196 bool (*get)(Object *, Error **), 2197 void (*set)(Object *, bool, Error **)) 2198 { 2199 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2200 2201 prop->get = get; 2202 prop->set = set; 2203 2204 return object_property_add(obj, name, "bool", 2205 get ? property_get_bool : NULL, 2206 set ? property_set_bool : NULL, 2207 property_release_bool, 2208 prop); 2209 } 2210 2211 ObjectProperty * 2212 object_class_property_add_bool(ObjectClass *klass, const char *name, 2213 bool (*get)(Object *, Error **), 2214 void (*set)(Object *, bool, Error **)) 2215 { 2216 BoolProperty *prop = g_malloc0(sizeof(*prop)); 2217 2218 prop->get = get; 2219 prop->set = set; 2220 2221 return object_class_property_add(klass, name, "bool", 2222 get ? property_get_bool : NULL, 2223 set ? property_set_bool : NULL, 2224 NULL, 2225 prop); 2226 } 2227 2228 static void property_get_enum(Object *obj, Visitor *v, const char *name, 2229 void *opaque, Error **errp) 2230 { 2231 EnumProperty *prop = opaque; 2232 int value; 2233 Error *err = NULL; 2234 2235 value = prop->get(obj, &err); 2236 if (err) { 2237 error_propagate(errp, err); 2238 return; 2239 } 2240 2241 visit_type_enum(v, name, &value, prop->lookup, errp); 2242 } 2243 2244 static void property_set_enum(Object *obj, Visitor *v, const char *name, 2245 void *opaque, Error **errp) 2246 { 2247 EnumProperty *prop = opaque; 2248 int value; 2249 Error *err = NULL; 2250 2251 visit_type_enum(v, name, &value, prop->lookup, &err); 2252 if (err) { 2253 error_propagate(errp, err); 2254 return; 2255 } 2256 prop->set(obj, value, errp); 2257 } 2258 2259 static void property_release_enum(Object *obj, const char *name, 2260 void *opaque) 2261 { 2262 EnumProperty *prop = opaque; 2263 g_free(prop); 2264 } 2265 2266 ObjectProperty * 2267 object_property_add_enum(Object *obj, const char *name, 2268 const char *typename, 2269 const QEnumLookup *lookup, 2270 int (*get)(Object *, Error **), 2271 void (*set)(Object *, int, Error **)) 2272 { 2273 EnumProperty *prop = g_malloc(sizeof(*prop)); 2274 2275 prop->lookup = lookup; 2276 prop->get = get; 2277 prop->set = set; 2278 2279 return object_property_add(obj, name, typename, 2280 get ? property_get_enum : NULL, 2281 set ? property_set_enum : NULL, 2282 property_release_enum, 2283 prop); 2284 } 2285 2286 ObjectProperty * 2287 object_class_property_add_enum(ObjectClass *klass, const char *name, 2288 const char *typename, 2289 const QEnumLookup *lookup, 2290 int (*get)(Object *, Error **), 2291 void (*set)(Object *, int, Error **)) 2292 { 2293 EnumProperty *prop = g_malloc(sizeof(*prop)); 2294 2295 prop->lookup = lookup; 2296 prop->get = get; 2297 prop->set = set; 2298 2299 return object_class_property_add(klass, name, typename, 2300 get ? property_get_enum : NULL, 2301 set ? property_set_enum : NULL, 2302 NULL, 2303 prop); 2304 } 2305 2306 typedef struct TMProperty { 2307 void (*get)(Object *, struct tm *, Error **); 2308 } TMProperty; 2309 2310 static void property_get_tm(Object *obj, Visitor *v, const char *name, 2311 void *opaque, Error **errp) 2312 { 2313 TMProperty *prop = opaque; 2314 Error *err = NULL; 2315 struct tm value; 2316 2317 prop->get(obj, &value, &err); 2318 if (err) { 2319 goto out; 2320 } 2321 2322 visit_start_struct(v, name, NULL, 0, &err); 2323 if (err) { 2324 goto out; 2325 } 2326 visit_type_int32(v, "tm_year", &value.tm_year, &err); 2327 if (err) { 2328 goto out_end; 2329 } 2330 visit_type_int32(v, "tm_mon", &value.tm_mon, &err); 2331 if (err) { 2332 goto out_end; 2333 } 2334 visit_type_int32(v, "tm_mday", &value.tm_mday, &err); 2335 if (err) { 2336 goto out_end; 2337 } 2338 visit_type_int32(v, "tm_hour", &value.tm_hour, &err); 2339 if (err) { 2340 goto out_end; 2341 } 2342 visit_type_int32(v, "tm_min", &value.tm_min, &err); 2343 if (err) { 2344 goto out_end; 2345 } 2346 visit_type_int32(v, "tm_sec", &value.tm_sec, &err); 2347 if (err) { 2348 goto out_end; 2349 } 2350 visit_check_struct(v, &err); 2351 out_end: 2352 visit_end_struct(v, NULL); 2353 out: 2354 error_propagate(errp, err); 2355 2356 } 2357 2358 static void property_release_tm(Object *obj, const char *name, 2359 void *opaque) 2360 { 2361 TMProperty *prop = opaque; 2362 g_free(prop); 2363 } 2364 2365 ObjectProperty * 2366 object_property_add_tm(Object *obj, 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_property_add(obj, name, "struct tm", 2374 get ? property_get_tm : NULL, NULL, 2375 property_release_tm, 2376 prop); 2377 } 2378 2379 ObjectProperty * 2380 object_class_property_add_tm(ObjectClass *klass, const char *name, 2381 void (*get)(Object *, struct tm *, Error **)) 2382 { 2383 TMProperty *prop = g_malloc0(sizeof(*prop)); 2384 2385 prop->get = get; 2386 2387 return object_class_property_add(klass, name, "struct tm", 2388 get ? property_get_tm : NULL, 2389 NULL, NULL, prop); 2390 } 2391 2392 static char *qdev_get_type(Object *obj, Error **errp) 2393 { 2394 return g_strdup(object_get_typename(obj)); 2395 } 2396 2397 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name, 2398 void *opaque, Error **errp) 2399 { 2400 uint8_t value = *(uint8_t *)opaque; 2401 visit_type_uint8(v, name, &value, errp); 2402 } 2403 2404 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name, 2405 void *opaque, Error **errp) 2406 { 2407 uint8_t *field = opaque; 2408 uint8_t value; 2409 Error *local_err = NULL; 2410 2411 visit_type_uint8(v, name, &value, &local_err); 2412 if (local_err) { 2413 error_propagate(errp, local_err); 2414 return; 2415 } 2416 2417 *field = value; 2418 } 2419 2420 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name, 2421 void *opaque, Error **errp) 2422 { 2423 uint16_t value = *(uint16_t *)opaque; 2424 visit_type_uint16(v, name, &value, errp); 2425 } 2426 2427 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name, 2428 void *opaque, Error **errp) 2429 { 2430 uint16_t *field = opaque; 2431 uint16_t value; 2432 Error *local_err = NULL; 2433 2434 visit_type_uint16(v, name, &value, &local_err); 2435 if (local_err) { 2436 error_propagate(errp, local_err); 2437 return; 2438 } 2439 2440 *field = value; 2441 } 2442 2443 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name, 2444 void *opaque, Error **errp) 2445 { 2446 uint32_t value = *(uint32_t *)opaque; 2447 visit_type_uint32(v, name, &value, errp); 2448 } 2449 2450 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name, 2451 void *opaque, Error **errp) 2452 { 2453 uint32_t *field = opaque; 2454 uint32_t value; 2455 Error *local_err = NULL; 2456 2457 visit_type_uint32(v, name, &value, &local_err); 2458 if (local_err) { 2459 error_propagate(errp, local_err); 2460 return; 2461 } 2462 2463 *field = value; 2464 } 2465 2466 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name, 2467 void *opaque, Error **errp) 2468 { 2469 uint64_t value = *(uint64_t *)opaque; 2470 visit_type_uint64(v, name, &value, errp); 2471 } 2472 2473 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name, 2474 void *opaque, Error **errp) 2475 { 2476 uint64_t *field = opaque; 2477 uint64_t value; 2478 Error *local_err = NULL; 2479 2480 visit_type_uint64(v, name, &value, &local_err); 2481 if (local_err) { 2482 error_propagate(errp, local_err); 2483 return; 2484 } 2485 2486 *field = value; 2487 } 2488 2489 ObjectProperty * 2490 object_property_add_uint8_ptr(Object *obj, const char *name, 2491 const uint8_t *v, 2492 ObjectPropertyFlags flags) 2493 { 2494 ObjectPropertyAccessor *getter = NULL; 2495 ObjectPropertyAccessor *setter = NULL; 2496 2497 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2498 getter = property_get_uint8_ptr; 2499 } 2500 2501 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2502 setter = property_set_uint8_ptr; 2503 } 2504 2505 return object_property_add(obj, name, "uint8", 2506 getter, setter, NULL, (void *)v); 2507 } 2508 2509 ObjectProperty * 2510 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name, 2511 const uint8_t *v, 2512 ObjectPropertyFlags flags) 2513 { 2514 ObjectPropertyAccessor *getter = NULL; 2515 ObjectPropertyAccessor *setter = NULL; 2516 2517 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2518 getter = property_get_uint8_ptr; 2519 } 2520 2521 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2522 setter = property_set_uint8_ptr; 2523 } 2524 2525 return object_class_property_add(klass, name, "uint8", 2526 getter, setter, NULL, (void *)v); 2527 } 2528 2529 ObjectProperty * 2530 object_property_add_uint16_ptr(Object *obj, const char *name, 2531 const uint16_t *v, 2532 ObjectPropertyFlags flags) 2533 { 2534 ObjectPropertyAccessor *getter = NULL; 2535 ObjectPropertyAccessor *setter = NULL; 2536 2537 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2538 getter = property_get_uint16_ptr; 2539 } 2540 2541 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2542 setter = property_set_uint16_ptr; 2543 } 2544 2545 return object_property_add(obj, name, "uint16", 2546 getter, setter, NULL, (void *)v); 2547 } 2548 2549 ObjectProperty * 2550 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name, 2551 const uint16_t *v, 2552 ObjectPropertyFlags flags) 2553 { 2554 ObjectPropertyAccessor *getter = NULL; 2555 ObjectPropertyAccessor *setter = NULL; 2556 2557 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2558 getter = property_get_uint16_ptr; 2559 } 2560 2561 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2562 setter = property_set_uint16_ptr; 2563 } 2564 2565 return object_class_property_add(klass, name, "uint16", 2566 getter, setter, NULL, (void *)v); 2567 } 2568 2569 ObjectProperty * 2570 object_property_add_uint32_ptr(Object *obj, const char *name, 2571 const uint32_t *v, 2572 ObjectPropertyFlags flags) 2573 { 2574 ObjectPropertyAccessor *getter = NULL; 2575 ObjectPropertyAccessor *setter = NULL; 2576 2577 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2578 getter = property_get_uint32_ptr; 2579 } 2580 2581 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2582 setter = property_set_uint32_ptr; 2583 } 2584 2585 return object_property_add(obj, name, "uint32", 2586 getter, setter, NULL, (void *)v); 2587 } 2588 2589 ObjectProperty * 2590 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name, 2591 const uint32_t *v, 2592 ObjectPropertyFlags flags) 2593 { 2594 ObjectPropertyAccessor *getter = NULL; 2595 ObjectPropertyAccessor *setter = NULL; 2596 2597 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2598 getter = property_get_uint32_ptr; 2599 } 2600 2601 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2602 setter = property_set_uint32_ptr; 2603 } 2604 2605 return object_class_property_add(klass, name, "uint32", 2606 getter, setter, NULL, (void *)v); 2607 } 2608 2609 ObjectProperty * 2610 object_property_add_uint64_ptr(Object *obj, const char *name, 2611 const uint64_t *v, 2612 ObjectPropertyFlags flags) 2613 { 2614 ObjectPropertyAccessor *getter = NULL; 2615 ObjectPropertyAccessor *setter = NULL; 2616 2617 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2618 getter = property_get_uint64_ptr; 2619 } 2620 2621 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2622 setter = property_set_uint64_ptr; 2623 } 2624 2625 return object_property_add(obj, name, "uint64", 2626 getter, setter, NULL, (void *)v); 2627 } 2628 2629 ObjectProperty * 2630 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name, 2631 const uint64_t *v, 2632 ObjectPropertyFlags flags) 2633 { 2634 ObjectPropertyAccessor *getter = NULL; 2635 ObjectPropertyAccessor *setter = NULL; 2636 2637 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { 2638 getter = property_get_uint64_ptr; 2639 } 2640 2641 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { 2642 setter = property_set_uint64_ptr; 2643 } 2644 2645 return object_class_property_add(klass, name, "uint64", 2646 getter, setter, NULL, (void *)v); 2647 } 2648 2649 typedef struct { 2650 Object *target_obj; 2651 char *target_name; 2652 } AliasProperty; 2653 2654 static void property_get_alias(Object *obj, Visitor *v, const char *name, 2655 void *opaque, Error **errp) 2656 { 2657 AliasProperty *prop = opaque; 2658 2659 object_property_get(prop->target_obj, v, prop->target_name, errp); 2660 } 2661 2662 static void property_set_alias(Object *obj, Visitor *v, const char *name, 2663 void *opaque, Error **errp) 2664 { 2665 AliasProperty *prop = opaque; 2666 2667 object_property_set(prop->target_obj, v, prop->target_name, errp); 2668 } 2669 2670 static Object *property_resolve_alias(Object *obj, void *opaque, 2671 const char *part) 2672 { 2673 AliasProperty *prop = opaque; 2674 2675 return object_resolve_path_component(prop->target_obj, prop->target_name); 2676 } 2677 2678 static void property_release_alias(Object *obj, const char *name, void *opaque) 2679 { 2680 AliasProperty *prop = opaque; 2681 2682 g_free(prop->target_name); 2683 g_free(prop); 2684 } 2685 2686 ObjectProperty * 2687 object_property_add_alias(Object *obj, const char *name, 2688 Object *target_obj, const char *target_name) 2689 { 2690 AliasProperty *prop; 2691 ObjectProperty *op; 2692 ObjectProperty *target_prop; 2693 g_autofree char *prop_type = NULL; 2694 2695 target_prop = object_property_find(target_obj, target_name, 2696 &error_abort); 2697 2698 if (object_property_is_child(target_prop)) { 2699 prop_type = g_strdup_printf("link%s", 2700 target_prop->type + strlen("child")); 2701 } else { 2702 prop_type = g_strdup(target_prop->type); 2703 } 2704 2705 prop = g_malloc(sizeof(*prop)); 2706 prop->target_obj = target_obj; 2707 prop->target_name = g_strdup(target_name); 2708 2709 op = object_property_add(obj, name, prop_type, 2710 property_get_alias, 2711 property_set_alias, 2712 property_release_alias, 2713 prop); 2714 op->resolve = property_resolve_alias; 2715 if (target_prop->defval) { 2716 op->defval = qobject_ref(target_prop->defval); 2717 } 2718 2719 object_property_set_description(obj, op->name, 2720 target_prop->description); 2721 return op; 2722 } 2723 2724 void object_property_set_description(Object *obj, const char *name, 2725 const char *description) 2726 { 2727 ObjectProperty *op; 2728 2729 op = object_property_find(obj, name, &error_abort); 2730 g_free(op->description); 2731 op->description = g_strdup(description); 2732 } 2733 2734 void object_class_property_set_description(ObjectClass *klass, 2735 const char *name, 2736 const char *description) 2737 { 2738 ObjectProperty *op; 2739 2740 op = g_hash_table_lookup(klass->properties, name); 2741 g_free(op->description); 2742 op->description = g_strdup(description); 2743 } 2744 2745 static void object_class_init(ObjectClass *klass, void *data) 2746 { 2747 object_class_property_add_str(klass, "type", qdev_get_type, 2748 NULL); 2749 } 2750 2751 static void register_types(void) 2752 { 2753 static TypeInfo interface_info = { 2754 .name = TYPE_INTERFACE, 2755 .class_size = sizeof(InterfaceClass), 2756 .abstract = true, 2757 }; 2758 2759 static TypeInfo object_info = { 2760 .name = TYPE_OBJECT, 2761 .instance_size = sizeof(Object), 2762 .class_init = object_class_init, 2763 .abstract = true, 2764 }; 2765 2766 type_interface = type_register_internal(&interface_info); 2767 type_register_internal(&object_info); 2768 } 2769 2770 type_init(register_types) 2771