Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20211016' into staging
[qemu.git] / qom / object.c
1 /*
2 * QEMU Object Model
3 *
4 * Copyright IBM, Corp. 2011
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "hw/qdev-core.h"
15 #include "qapi/error.h"
16 #include "qom/object.h"
17 #include "qom/object_interfaces.h"
18 #include "qemu/cutils.h"
19 #include "qapi/visitor.h"
20 #include "qapi/string-input-visitor.h"
21 #include "qapi/string-output-visitor.h"
22 #include "qapi/qobject-input-visitor.h"
23 #include "qapi/qapi-builtin-visit.h"
24 #include "qapi/qmp/qerror.h"
25 #include "qapi/qmp/qjson.h"
26 #include "trace.h"
27
28 /* TODO: replace QObject with a simpler visitor to avoid a dependency
29 * of the QOM core on QObject? */
30 #include "qom/qom-qobject.h"
31 #include "qapi/qmp/qbool.h"
32 #include "qapi/qmp/qnum.h"
33 #include "qapi/qmp/qstring.h"
34 #include "qemu/error-report.h"
35
36 #define MAX_INTERFACES 32
37
38 typedef struct InterfaceImpl InterfaceImpl;
39 typedef struct TypeImpl TypeImpl;
40
41 struct InterfaceImpl
42 {
43 const char *typename;
44 };
45
46 struct TypeImpl
47 {
48 const char *name;
49
50 size_t class_size;
51
52 size_t instance_size;
53 size_t instance_align;
54
55 void (*class_init)(ObjectClass *klass, void *data);
56 void (*class_base_init)(ObjectClass *klass, void *data);
57
58 void *class_data;
59
60 void (*instance_init)(Object *obj);
61 void (*instance_post_init)(Object *obj);
62 void (*instance_finalize)(Object *obj);
63
64 bool abstract;
65
66 const char *parent;
67 TypeImpl *parent_type;
68
69 ObjectClass *class;
70
71 int num_interfaces;
72 InterfaceImpl interfaces[MAX_INTERFACES];
73 };
74
75 static Type type_interface;
76
77 static GHashTable *type_table_get(void)
78 {
79 static GHashTable *type_table;
80
81 if (type_table == NULL) {
82 type_table = g_hash_table_new(g_str_hash, g_str_equal);
83 }
84
85 return type_table;
86 }
87
88 static bool enumerating_types;
89
90 static void type_table_add(TypeImpl *ti)
91 {
92 assert(!enumerating_types);
93 g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
94 }
95
96 static TypeImpl *type_table_lookup(const char *name)
97 {
98 return g_hash_table_lookup(type_table_get(), name);
99 }
100
101 static TypeImpl *type_new(const TypeInfo *info)
102 {
103 TypeImpl *ti = g_malloc0(sizeof(*ti));
104 int i;
105
106 g_assert(info->name != NULL);
107
108 if (type_table_lookup(info->name) != NULL) {
109 fprintf(stderr, "Registering `%s' which already exists\n", info->name);
110 abort();
111 }
112
113 ti->name = g_strdup(info->name);
114 ti->parent = g_strdup(info->parent);
115
116 ti->class_size = info->class_size;
117 ti->instance_size = info->instance_size;
118 ti->instance_align = info->instance_align;
119
120 ti->class_init = info->class_init;
121 ti->class_base_init = info->class_base_init;
122 ti->class_data = info->class_data;
123
124 ti->instance_init = info->instance_init;
125 ti->instance_post_init = info->instance_post_init;
126 ti->instance_finalize = info->instance_finalize;
127
128 ti->abstract = info->abstract;
129
130 for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
131 ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
132 }
133 ti->num_interfaces = i;
134
135 return ti;
136 }
137
138 static TypeImpl *type_register_internal(const TypeInfo *info)
139 {
140 TypeImpl *ti;
141 ti = type_new(info);
142
143 type_table_add(ti);
144 return ti;
145 }
146
147 TypeImpl *type_register(const TypeInfo *info)
148 {
149 assert(info->parent);
150 return type_register_internal(info);
151 }
152
153 TypeImpl *type_register_static(const TypeInfo *info)
154 {
155 return type_register(info);
156 }
157
158 void type_register_static_array(const TypeInfo *infos, int nr_infos)
159 {
160 int i;
161
162 for (i = 0; i < nr_infos; i++) {
163 type_register_static(&infos[i]);
164 }
165 }
166
167 static TypeImpl *type_get_by_name(const char *name)
168 {
169 if (name == NULL) {
170 return NULL;
171 }
172
173 return type_table_lookup(name);
174 }
175
176 static TypeImpl *type_get_parent(TypeImpl *type)
177 {
178 if (!type->parent_type && type->parent) {
179 type->parent_type = type_get_by_name(type->parent);
180 if (!type->parent_type) {
181 fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
182 type->name, type->parent);
183 abort();
184 }
185 }
186
187 return type->parent_type;
188 }
189
190 static bool type_has_parent(TypeImpl *type)
191 {
192 return (type->parent != NULL);
193 }
194
195 static size_t type_class_get_size(TypeImpl *ti)
196 {
197 if (ti->class_size) {
198 return ti->class_size;
199 }
200
201 if (type_has_parent(ti)) {
202 return type_class_get_size(type_get_parent(ti));
203 }
204
205 return sizeof(ObjectClass);
206 }
207
208 static size_t type_object_get_size(TypeImpl *ti)
209 {
210 if (ti->instance_size) {
211 return ti->instance_size;
212 }
213
214 if (type_has_parent(ti)) {
215 return type_object_get_size(type_get_parent(ti));
216 }
217
218 return 0;
219 }
220
221 size_t object_type_get_instance_size(const char *typename)
222 {
223 TypeImpl *type = type_get_by_name(typename);
224
225 g_assert(type != NULL);
226 return type_object_get_size(type);
227 }
228
229 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
230 {
231 assert(target_type);
232
233 /* Check if target_type is a direct ancestor of type */
234 while (type) {
235 if (type == target_type) {
236 return true;
237 }
238
239 type = type_get_parent(type);
240 }
241
242 return false;
243 }
244
245 static void type_initialize(TypeImpl *ti);
246
247 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
248 TypeImpl *parent_type)
249 {
250 InterfaceClass *new_iface;
251 TypeInfo info = { };
252 TypeImpl *iface_impl;
253
254 info.parent = parent_type->name;
255 info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
256 info.abstract = true;
257
258 iface_impl = type_new(&info);
259 iface_impl->parent_type = parent_type;
260 type_initialize(iface_impl);
261 g_free((char *)info.name);
262
263 new_iface = (InterfaceClass *)iface_impl->class;
264 new_iface->concrete_class = ti->class;
265 new_iface->interface_type = interface_type;
266
267 ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface);
268 }
269
270 static void object_property_free(gpointer data)
271 {
272 ObjectProperty *prop = data;
273
274 if (prop->defval) {
275 qobject_unref(prop->defval);
276 prop->defval = NULL;
277 }
278 g_free(prop->name);
279 g_free(prop->type);
280 g_free(prop->description);
281 g_free(prop);
282 }
283
284 static void type_initialize(TypeImpl *ti)
285 {
286 TypeImpl *parent;
287
288 if (ti->class) {
289 return;
290 }
291
292 ti->class_size = type_class_get_size(ti);
293 ti->instance_size = type_object_get_size(ti);
294 /* Any type with zero instance_size is implicitly abstract.
295 * This means interface types are all abstract.
296 */
297 if (ti->instance_size == 0) {
298 ti->abstract = true;
299 }
300 if (type_is_ancestor(ti, type_interface)) {
301 assert(ti->instance_size == 0);
302 assert(ti->abstract);
303 assert(!ti->instance_init);
304 assert(!ti->instance_post_init);
305 assert(!ti->instance_finalize);
306 assert(!ti->num_interfaces);
307 }
308 ti->class = g_malloc0(ti->class_size);
309
310 parent = type_get_parent(ti);
311 if (parent) {
312 type_initialize(parent);
313 GSList *e;
314 int i;
315
316 g_assert(parent->class_size <= ti->class_size);
317 g_assert(parent->instance_size <= ti->instance_size);
318 memcpy(ti->class, parent->class, parent->class_size);
319 ti->class->interfaces = NULL;
320
321 for (e = parent->class->interfaces; e; e = e->next) {
322 InterfaceClass *iface = e->data;
323 ObjectClass *klass = OBJECT_CLASS(iface);
324
325 type_initialize_interface(ti, iface->interface_type, klass->type);
326 }
327
328 for (i = 0; i < ti->num_interfaces; i++) {
329 TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
330 if (!t) {
331 error_report("missing interface '%s' for object '%s'",
332 ti->interfaces[i].typename, parent->name);
333 abort();
334 }
335 for (e = ti->class->interfaces; e; e = e->next) {
336 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
337
338 if (type_is_ancestor(target_type, t)) {
339 break;
340 }
341 }
342
343 if (e) {
344 continue;
345 }
346
347 type_initialize_interface(ti, t, t);
348 }
349 }
350
351 ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
352 object_property_free);
353
354 ti->class->type = ti;
355
356 while (parent) {
357 if (parent->class_base_init) {
358 parent->class_base_init(ti->class, ti->class_data);
359 }
360 parent = type_get_parent(parent);
361 }
362
363 if (ti->class_init) {
364 ti->class_init(ti->class, ti->class_data);
365 }
366 }
367
368 static void object_init_with_type(Object *obj, TypeImpl *ti)
369 {
370 if (type_has_parent(ti)) {
371 object_init_with_type(obj, type_get_parent(ti));
372 }
373
374 if (ti->instance_init) {
375 ti->instance_init(obj);
376 }
377 }
378
379 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
380 {
381 if (ti->instance_post_init) {
382 ti->instance_post_init(obj);
383 }
384
385 if (type_has_parent(ti)) {
386 object_post_init_with_type(obj, type_get_parent(ti));
387 }
388 }
389
390 bool object_apply_global_props(Object *obj, const GPtrArray *props,
391 Error **errp)
392 {
393 int i;
394
395 if (!props) {
396 return true;
397 }
398
399 for (i = 0; i < props->len; i++) {
400 GlobalProperty *p = g_ptr_array_index(props, i);
401 Error *err = NULL;
402
403 if (object_dynamic_cast(obj, p->driver) == NULL) {
404 continue;
405 }
406 if (p->optional && !object_property_find(obj, p->property)) {
407 continue;
408 }
409 p->used = true;
410 if (!object_property_parse(obj, p->property, p->value, &err)) {
411 error_prepend(&err, "can't apply global %s.%s=%s: ",
412 p->driver, p->property, p->value);
413 /*
414 * If errp != NULL, propagate error and return.
415 * If errp == NULL, report a warning, but keep going
416 * with the remaining globals.
417 */
418 if (errp) {
419 error_propagate(errp, err);
420 return false;
421 } else {
422 warn_report_err(err);
423 }
424 }
425 }
426
427 return true;
428 }
429
430 /*
431 * Global property defaults
432 * Slot 0: accelerator's global property defaults
433 * Slot 1: machine's global property defaults
434 * Slot 2: global properties from legacy command line option
435 * Each is a GPtrArray of of GlobalProperty.
436 * Applied in order, later entries override earlier ones.
437 */
438 static GPtrArray *object_compat_props[3];
439
440 /*
441 * Retrieve @GPtrArray for global property defined with options
442 * other than "-global". These are generally used for syntactic
443 * sugar and legacy command line options.
444 */
445 void object_register_sugar_prop(const char *driver, const char *prop,
446 const char *value, bool optional)
447 {
448 GlobalProperty *g;
449 if (!object_compat_props[2]) {
450 object_compat_props[2] = g_ptr_array_new();
451 }
452 g = g_new0(GlobalProperty, 1);
453 g->driver = g_strdup(driver);
454 g->property = g_strdup(prop);
455 g->value = g_strdup(value);
456 g->optional = optional;
457 g_ptr_array_add(object_compat_props[2], g);
458 }
459
460 /*
461 * Set machine's global property defaults to @compat_props.
462 * May be called at most once.
463 */
464 void object_set_machine_compat_props(GPtrArray *compat_props)
465 {
466 assert(!object_compat_props[1]);
467 object_compat_props[1] = compat_props;
468 }
469
470 /*
471 * Set accelerator's global property defaults to @compat_props.
472 * May be called at most once.
473 */
474 void object_set_accelerator_compat_props(GPtrArray *compat_props)
475 {
476 assert(!object_compat_props[0]);
477 object_compat_props[0] = compat_props;
478 }
479
480 void object_apply_compat_props(Object *obj)
481 {
482 int i;
483
484 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
485 object_apply_global_props(obj, object_compat_props[i],
486 i == 2 ? &error_fatal : &error_abort);
487 }
488 }
489
490 static void object_class_property_init_all(Object *obj)
491 {
492 ObjectPropertyIterator iter;
493 ObjectProperty *prop;
494
495 object_class_property_iter_init(&iter, object_get_class(obj));
496 while ((prop = object_property_iter_next(&iter))) {
497 if (prop->init) {
498 prop->init(obj, prop);
499 }
500 }
501 }
502
503 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
504 {
505 type_initialize(type);
506
507 g_assert(type->instance_size >= sizeof(Object));
508 g_assert(type->abstract == false);
509 g_assert(size >= type->instance_size);
510
511 memset(obj, 0, type->instance_size);
512 obj->class = type->class;
513 object_ref(obj);
514 object_class_property_init_all(obj);
515 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
516 NULL, object_property_free);
517 object_init_with_type(obj, type);
518 object_post_init_with_type(obj, type);
519 }
520
521 void object_initialize(void *data, size_t size, const char *typename)
522 {
523 TypeImpl *type = type_get_by_name(typename);
524
525 #ifdef CONFIG_MODULES
526 if (!type) {
527 module_load_qom_one(typename);
528 type = type_get_by_name(typename);
529 }
530 #endif
531 if (!type) {
532 error_report("missing object type '%s'", typename);
533 abort();
534 }
535
536 object_initialize_with_type(data, size, type);
537 }
538
539 bool object_initialize_child_with_props(Object *parentobj,
540 const char *propname,
541 void *childobj, size_t size,
542 const char *type,
543 Error **errp, ...)
544 {
545 va_list vargs;
546 bool ok;
547
548 va_start(vargs, errp);
549 ok = object_initialize_child_with_propsv(parentobj, propname,
550 childobj, size, type, errp,
551 vargs);
552 va_end(vargs);
553 return ok;
554 }
555
556 bool object_initialize_child_with_propsv(Object *parentobj,
557 const char *propname,
558 void *childobj, size_t size,
559 const char *type,
560 Error **errp, va_list vargs)
561 {
562 bool ok = false;
563 Object *obj;
564 UserCreatable *uc;
565
566 object_initialize(childobj, size, type);
567 obj = OBJECT(childobj);
568
569 if (!object_set_propv(obj, errp, vargs)) {
570 goto out;
571 }
572
573 object_property_add_child(parentobj, propname, obj);
574
575 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
576 if (uc) {
577 if (!user_creatable_complete(uc, errp)) {
578 object_unparent(obj);
579 goto out;
580 }
581 }
582
583 ok = true;
584
585 out:
586 /*
587 * We want @obj's reference to be 1 on success, 0 on failure.
588 * On success, it's 2: one taken by object_initialize(), and one
589 * by object_property_add_child().
590 * On failure in object_initialize() or earlier, it's 1.
591 * On failure afterwards, it's also 1: object_unparent() releases
592 * the reference taken by object_property_add_child().
593 */
594 object_unref(obj);
595 return ok;
596 }
597
598 void object_initialize_child_internal(Object *parent,
599 const char *propname,
600 void *child, size_t size,
601 const char *type)
602 {
603 object_initialize_child_with_props(parent, propname, child, size, type,
604 &error_abort, NULL);
605 }
606
607 static inline bool object_property_is_child(ObjectProperty *prop)
608 {
609 return strstart(prop->type, "child<", NULL);
610 }
611
612 static void object_property_del_all(Object *obj)
613 {
614 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
615 ObjectProperty *prop;
616 ObjectPropertyIterator iter;
617 bool released;
618
619 do {
620 released = false;
621 object_property_iter_init(&iter, obj);
622 while ((prop = object_property_iter_next(&iter)) != NULL) {
623 if (g_hash_table_add(done, prop)) {
624 if (prop->release) {
625 prop->release(obj, prop->name, prop->opaque);
626 released = true;
627 break;
628 }
629 }
630 }
631 } while (released);
632
633 g_hash_table_unref(obj->properties);
634 }
635
636 static void object_property_del_child(Object *obj, Object *child)
637 {
638 ObjectProperty *prop;
639 GHashTableIter iter;
640 gpointer key, value;
641
642 g_hash_table_iter_init(&iter, obj->properties);
643 while (g_hash_table_iter_next(&iter, &key, &value)) {
644 prop = value;
645 if (object_property_is_child(prop) && prop->opaque == child) {
646 if (prop->release) {
647 prop->release(obj, prop->name, prop->opaque);
648 prop->release = NULL;
649 }
650 break;
651 }
652 }
653 g_hash_table_iter_init(&iter, obj->properties);
654 while (g_hash_table_iter_next(&iter, &key, &value)) {
655 prop = value;
656 if (object_property_is_child(prop) && prop->opaque == child) {
657 g_hash_table_iter_remove(&iter);
658 break;
659 }
660 }
661 }
662
663 void object_unparent(Object *obj)
664 {
665 if (obj->parent) {
666 object_property_del_child(obj->parent, obj);
667 }
668 }
669
670 static void object_deinit(Object *obj, TypeImpl *type)
671 {
672 if (type->instance_finalize) {
673 type->instance_finalize(obj);
674 }
675
676 if (type_has_parent(type)) {
677 object_deinit(obj, type_get_parent(type));
678 }
679 }
680
681 static void object_finalize(void *data)
682 {
683 Object *obj = data;
684 TypeImpl *ti = obj->class->type;
685
686 object_property_del_all(obj);
687 object_deinit(obj, ti);
688
689 g_assert(obj->ref == 0);
690 g_assert(obj->parent == NULL);
691 if (obj->free) {
692 obj->free(obj);
693 }
694 }
695
696 /* Find the minimum alignment guaranteed by the system malloc. */
697 #if __STDC_VERSION__ >= 201112L
698 typedef max_align_t qemu_max_align_t;
699 #else
700 typedef union {
701 long l;
702 void *p;
703 double d;
704 long double ld;
705 } qemu_max_align_t;
706 #endif
707
708 static Object *object_new_with_type(Type type)
709 {
710 Object *obj;
711 size_t size, align;
712 void (*obj_free)(void *);
713
714 g_assert(type != NULL);
715 type_initialize(type);
716
717 size = type->instance_size;
718 align = type->instance_align;
719
720 /*
721 * Do not use qemu_memalign unless required. Depending on the
722 * implementation, extra alignment implies extra overhead.
723 */
724 if (likely(align <= __alignof__(qemu_max_align_t))) {
725 obj = g_malloc(size);
726 obj_free = g_free;
727 } else {
728 obj = qemu_memalign(align, size);
729 obj_free = qemu_vfree;
730 }
731
732 object_initialize_with_type(obj, size, type);
733 obj->free = obj_free;
734
735 return obj;
736 }
737
738 Object *object_new_with_class(ObjectClass *klass)
739 {
740 return object_new_with_type(klass->type);
741 }
742
743 Object *object_new(const char *typename)
744 {
745 TypeImpl *ti = type_get_by_name(typename);
746
747 return object_new_with_type(ti);
748 }
749
750
751 Object *object_new_with_props(const char *typename,
752 Object *parent,
753 const char *id,
754 Error **errp,
755 ...)
756 {
757 va_list vargs;
758 Object *obj;
759
760 va_start(vargs, errp);
761 obj = object_new_with_propv(typename, parent, id, errp, vargs);
762 va_end(vargs);
763
764 return obj;
765 }
766
767
768 Object *object_new_with_propv(const char *typename,
769 Object *parent,
770 const char *id,
771 Error **errp,
772 va_list vargs)
773 {
774 Object *obj;
775 ObjectClass *klass;
776 UserCreatable *uc;
777
778 klass = object_class_by_name(typename);
779 if (!klass) {
780 error_setg(errp, "invalid object type: %s", typename);
781 return NULL;
782 }
783
784 if (object_class_is_abstract(klass)) {
785 error_setg(errp, "object type '%s' is abstract", typename);
786 return NULL;
787 }
788 obj = object_new_with_type(klass->type);
789
790 if (!object_set_propv(obj, errp, vargs)) {
791 goto error;
792 }
793
794 if (id != NULL) {
795 object_property_add_child(parent, id, obj);
796 }
797
798 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
799 if (uc) {
800 if (!user_creatable_complete(uc, errp)) {
801 if (id != NULL) {
802 object_unparent(obj);
803 }
804 goto error;
805 }
806 }
807
808 object_unref(obj);
809 return obj;
810
811 error:
812 object_unref(obj);
813 return NULL;
814 }
815
816
817 bool object_set_props(Object *obj,
818 Error **errp,
819 ...)
820 {
821 va_list vargs;
822 bool ret;
823
824 va_start(vargs, errp);
825 ret = object_set_propv(obj, errp, vargs);
826 va_end(vargs);
827
828 return ret;
829 }
830
831
832 bool object_set_propv(Object *obj,
833 Error **errp,
834 va_list vargs)
835 {
836 const char *propname;
837
838 propname = va_arg(vargs, char *);
839 while (propname != NULL) {
840 const char *value = va_arg(vargs, char *);
841
842 g_assert(value != NULL);
843 if (!object_property_parse(obj, propname, value, errp)) {
844 return false;
845 }
846 propname = va_arg(vargs, char *);
847 }
848
849 return true;
850 }
851
852
853 Object *object_dynamic_cast(Object *obj, const char *typename)
854 {
855 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
856 return obj;
857 }
858
859 return NULL;
860 }
861
862 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
863 const char *file, int line, const char *func)
864 {
865 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
866 typename, file, line, func);
867
868 #ifdef CONFIG_QOM_CAST_DEBUG
869 int i;
870 Object *inst;
871
872 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
873 if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) {
874 goto out;
875 }
876 }
877
878 inst = object_dynamic_cast(obj, typename);
879
880 if (!inst && obj) {
881 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
882 file, line, func, obj, typename);
883 abort();
884 }
885
886 assert(obj == inst);
887
888 if (obj && obj == inst) {
889 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
890 qatomic_set(&obj->class->object_cast_cache[i - 1],
891 qatomic_read(&obj->class->object_cast_cache[i]));
892 }
893 qatomic_set(&obj->class->object_cast_cache[i - 1], typename);
894 }
895
896 out:
897 #endif
898 return obj;
899 }
900
901 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
902 const char *typename)
903 {
904 ObjectClass *ret = NULL;
905 TypeImpl *target_type;
906 TypeImpl *type;
907
908 if (!class) {
909 return NULL;
910 }
911
912 /* A simple fast path that can trigger a lot for leaf classes. */
913 type = class->type;
914 if (type->name == typename) {
915 return class;
916 }
917
918 target_type = type_get_by_name(typename);
919 if (!target_type) {
920 /* target class type unknown, so fail the cast */
921 return NULL;
922 }
923
924 if (type->class->interfaces &&
925 type_is_ancestor(target_type, type_interface)) {
926 int found = 0;
927 GSList *i;
928
929 for (i = class->interfaces; i; i = i->next) {
930 ObjectClass *target_class = i->data;
931
932 if (type_is_ancestor(target_class->type, target_type)) {
933 ret = target_class;
934 found++;
935 }
936 }
937
938 /* The match was ambiguous, don't allow a cast */
939 if (found > 1) {
940 ret = NULL;
941 }
942 } else if (type_is_ancestor(type, target_type)) {
943 ret = class;
944 }
945
946 return ret;
947 }
948
949 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
950 const char *typename,
951 const char *file, int line,
952 const char *func)
953 {
954 ObjectClass *ret;
955
956 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
957 typename, file, line, func);
958
959 #ifdef CONFIG_QOM_CAST_DEBUG
960 int i;
961
962 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
963 if (qatomic_read(&class->class_cast_cache[i]) == typename) {
964 ret = class;
965 goto out;
966 }
967 }
968 #else
969 if (!class || !class->interfaces) {
970 return class;
971 }
972 #endif
973
974 ret = object_class_dynamic_cast(class, typename);
975 if (!ret && class) {
976 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
977 file, line, func, class, typename);
978 abort();
979 }
980
981 #ifdef CONFIG_QOM_CAST_DEBUG
982 if (class && ret == class) {
983 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
984 qatomic_set(&class->class_cast_cache[i - 1],
985 qatomic_read(&class->class_cast_cache[i]));
986 }
987 qatomic_set(&class->class_cast_cache[i - 1], typename);
988 }
989 out:
990 #endif
991 return ret;
992 }
993
994 const char *object_get_typename(const Object *obj)
995 {
996 return obj->class->type->name;
997 }
998
999 ObjectClass *object_get_class(Object *obj)
1000 {
1001 return obj->class;
1002 }
1003
1004 bool object_class_is_abstract(ObjectClass *klass)
1005 {
1006 return klass->type->abstract;
1007 }
1008
1009 const char *object_class_get_name(ObjectClass *klass)
1010 {
1011 return klass->type->name;
1012 }
1013
1014 ObjectClass *object_class_by_name(const char *typename)
1015 {
1016 TypeImpl *type = type_get_by_name(typename);
1017
1018 if (!type) {
1019 return NULL;
1020 }
1021
1022 type_initialize(type);
1023
1024 return type->class;
1025 }
1026
1027 ObjectClass *module_object_class_by_name(const char *typename)
1028 {
1029 ObjectClass *oc;
1030
1031 oc = object_class_by_name(typename);
1032 #ifdef CONFIG_MODULES
1033 if (!oc) {
1034 module_load_qom_one(typename);
1035 oc = object_class_by_name(typename);
1036 }
1037 #endif
1038 return oc;
1039 }
1040
1041 ObjectClass *object_class_get_parent(ObjectClass *class)
1042 {
1043 TypeImpl *type = type_get_parent(class->type);
1044
1045 if (!type) {
1046 return NULL;
1047 }
1048
1049 type_initialize(type);
1050
1051 return type->class;
1052 }
1053
1054 typedef struct OCFData
1055 {
1056 void (*fn)(ObjectClass *klass, void *opaque);
1057 const char *implements_type;
1058 bool include_abstract;
1059 void *opaque;
1060 } OCFData;
1061
1062 static void object_class_foreach_tramp(gpointer key, gpointer value,
1063 gpointer opaque)
1064 {
1065 OCFData *data = opaque;
1066 TypeImpl *type = value;
1067 ObjectClass *k;
1068
1069 type_initialize(type);
1070 k = type->class;
1071
1072 if (!data->include_abstract && type->abstract) {
1073 return;
1074 }
1075
1076 if (data->implements_type &&
1077 !object_class_dynamic_cast(k, data->implements_type)) {
1078 return;
1079 }
1080
1081 data->fn(k, data->opaque);
1082 }
1083
1084 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1085 const char *implements_type, bool include_abstract,
1086 void *opaque)
1087 {
1088 OCFData data = { fn, implements_type, include_abstract, opaque };
1089
1090 enumerating_types = true;
1091 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1092 enumerating_types = false;
1093 }
1094
1095 static int do_object_child_foreach(Object *obj,
1096 int (*fn)(Object *child, void *opaque),
1097 void *opaque, bool recurse)
1098 {
1099 GHashTableIter iter;
1100 ObjectProperty *prop;
1101 int ret = 0;
1102
1103 g_hash_table_iter_init(&iter, obj->properties);
1104 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1105 if (object_property_is_child(prop)) {
1106 Object *child = prop->opaque;
1107
1108 ret = fn(child, opaque);
1109 if (ret != 0) {
1110 break;
1111 }
1112 if (recurse) {
1113 ret = do_object_child_foreach(child, fn, opaque, true);
1114 if (ret != 0) {
1115 break;
1116 }
1117 }
1118 }
1119 }
1120 return ret;
1121 }
1122
1123 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1124 void *opaque)
1125 {
1126 return do_object_child_foreach(obj, fn, opaque, false);
1127 }
1128
1129 int object_child_foreach_recursive(Object *obj,
1130 int (*fn)(Object *child, void *opaque),
1131 void *opaque)
1132 {
1133 return do_object_child_foreach(obj, fn, opaque, true);
1134 }
1135
1136 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1137 {
1138 GSList **list = opaque;
1139
1140 *list = g_slist_prepend(*list, klass);
1141 }
1142
1143 GSList *object_class_get_list(const char *implements_type,
1144 bool include_abstract)
1145 {
1146 GSList *list = NULL;
1147
1148 object_class_foreach(object_class_get_list_tramp,
1149 implements_type, include_abstract, &list);
1150 return list;
1151 }
1152
1153 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1154 {
1155 return strcasecmp(object_class_get_name((ObjectClass *)a),
1156 object_class_get_name((ObjectClass *)b));
1157 }
1158
1159 GSList *object_class_get_list_sorted(const char *implements_type,
1160 bool include_abstract)
1161 {
1162 return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1163 object_class_cmp);
1164 }
1165
1166 Object *object_ref(void *objptr)
1167 {
1168 Object *obj = OBJECT(objptr);
1169 if (!obj) {
1170 return NULL;
1171 }
1172 qatomic_inc(&obj->ref);
1173 return obj;
1174 }
1175
1176 void object_unref(void *objptr)
1177 {
1178 Object *obj = OBJECT(objptr);
1179 if (!obj) {
1180 return;
1181 }
1182 g_assert(obj->ref > 0);
1183
1184 /* parent always holds a reference to its children */
1185 if (qatomic_fetch_dec(&obj->ref) == 1) {
1186 object_finalize(obj);
1187 }
1188 }
1189
1190 ObjectProperty *
1191 object_property_try_add(Object *obj, const char *name, const char *type,
1192 ObjectPropertyAccessor *get,
1193 ObjectPropertyAccessor *set,
1194 ObjectPropertyRelease *release,
1195 void *opaque, Error **errp)
1196 {
1197 ObjectProperty *prop;
1198 size_t name_len = strlen(name);
1199
1200 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1201 int i;
1202 ObjectProperty *ret = NULL;
1203 char *name_no_array = g_strdup(name);
1204
1205 name_no_array[name_len - 3] = '\0';
1206 for (i = 0; i < INT16_MAX; ++i) {
1207 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1208
1209 ret = object_property_try_add(obj, full_name, type, get, set,
1210 release, opaque, NULL);
1211 g_free(full_name);
1212 if (ret) {
1213 break;
1214 }
1215 }
1216 g_free(name_no_array);
1217 assert(ret);
1218 return ret;
1219 }
1220
1221 if (object_property_find(obj, name) != NULL) {
1222 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1223 name, object_get_typename(obj));
1224 return NULL;
1225 }
1226
1227 prop = g_malloc0(sizeof(*prop));
1228
1229 prop->name = g_strdup(name);
1230 prop->type = g_strdup(type);
1231
1232 prop->get = get;
1233 prop->set = set;
1234 prop->release = release;
1235 prop->opaque = opaque;
1236
1237 g_hash_table_insert(obj->properties, prop->name, prop);
1238 return prop;
1239 }
1240
1241 ObjectProperty *
1242 object_property_add(Object *obj, const char *name, const char *type,
1243 ObjectPropertyAccessor *get,
1244 ObjectPropertyAccessor *set,
1245 ObjectPropertyRelease *release,
1246 void *opaque)
1247 {
1248 return object_property_try_add(obj, name, type, get, set, release,
1249 opaque, &error_abort);
1250 }
1251
1252 ObjectProperty *
1253 object_class_property_add(ObjectClass *klass,
1254 const char *name,
1255 const char *type,
1256 ObjectPropertyAccessor *get,
1257 ObjectPropertyAccessor *set,
1258 ObjectPropertyRelease *release,
1259 void *opaque)
1260 {
1261 ObjectProperty *prop;
1262
1263 assert(!object_class_property_find(klass, name));
1264
1265 prop = g_malloc0(sizeof(*prop));
1266
1267 prop->name = g_strdup(name);
1268 prop->type = g_strdup(type);
1269
1270 prop->get = get;
1271 prop->set = set;
1272 prop->release = release;
1273 prop->opaque = opaque;
1274
1275 g_hash_table_insert(klass->properties, prop->name, prop);
1276
1277 return prop;
1278 }
1279
1280 ObjectProperty *object_property_find(Object *obj, const char *name)
1281 {
1282 ObjectProperty *prop;
1283 ObjectClass *klass = object_get_class(obj);
1284
1285 prop = object_class_property_find(klass, name);
1286 if (prop) {
1287 return prop;
1288 }
1289
1290 return g_hash_table_lookup(obj->properties, name);
1291 }
1292
1293 ObjectProperty *object_property_find_err(Object *obj, const char *name,
1294 Error **errp)
1295 {
1296 ObjectProperty *prop = object_property_find(obj, name);
1297 if (!prop) {
1298 error_setg(errp, "Property '%s.%s' not found",
1299 object_get_typename(obj), name);
1300 }
1301 return prop;
1302 }
1303
1304 void object_property_iter_init(ObjectPropertyIterator *iter,
1305 Object *obj)
1306 {
1307 g_hash_table_iter_init(&iter->iter, obj->properties);
1308 iter->nextclass = object_get_class(obj);
1309 }
1310
1311 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1312 {
1313 gpointer key, val;
1314 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1315 if (!iter->nextclass) {
1316 return NULL;
1317 }
1318 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1319 iter->nextclass = object_class_get_parent(iter->nextclass);
1320 }
1321 return val;
1322 }
1323
1324 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1325 ObjectClass *klass)
1326 {
1327 g_hash_table_iter_init(&iter->iter, klass->properties);
1328 iter->nextclass = object_class_get_parent(klass);
1329 }
1330
1331 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name)
1332 {
1333 ObjectClass *parent_klass;
1334
1335 parent_klass = object_class_get_parent(klass);
1336 if (parent_klass) {
1337 ObjectProperty *prop =
1338 object_class_property_find(parent_klass, name);
1339 if (prop) {
1340 return prop;
1341 }
1342 }
1343
1344 return g_hash_table_lookup(klass->properties, name);
1345 }
1346
1347 ObjectProperty *object_class_property_find_err(ObjectClass *klass,
1348 const char *name,
1349 Error **errp)
1350 {
1351 ObjectProperty *prop = object_class_property_find(klass, name);
1352 if (!prop) {
1353 error_setg(errp, "Property '.%s' not found", name);
1354 }
1355 return prop;
1356 }
1357
1358
1359 void object_property_del(Object *obj, const char *name)
1360 {
1361 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1362
1363 if (prop->release) {
1364 prop->release(obj, name, prop->opaque);
1365 }
1366 g_hash_table_remove(obj->properties, name);
1367 }
1368
1369 bool object_property_get(Object *obj, const char *name, Visitor *v,
1370 Error **errp)
1371 {
1372 Error *err = NULL;
1373 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1374
1375 if (prop == NULL) {
1376 return false;
1377 }
1378
1379 if (!prop->get) {
1380 error_setg(errp, QERR_PERMISSION_DENIED);
1381 return false;
1382 }
1383 prop->get(obj, v, name, prop->opaque, &err);
1384 error_propagate(errp, err);
1385 return !err;
1386 }
1387
1388 bool object_property_set(Object *obj, const char *name, Visitor *v,
1389 Error **errp)
1390 {
1391 Error *err = NULL;
1392 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1393
1394 if (prop == NULL) {
1395 return false;
1396 }
1397
1398 if (!prop->set) {
1399 error_setg(errp, QERR_PERMISSION_DENIED);
1400 return false;
1401 }
1402 prop->set(obj, v, name, prop->opaque, &err);
1403 error_propagate(errp, err);
1404 return !err;
1405 }
1406
1407 bool object_property_set_str(Object *obj, const char *name,
1408 const char *value, Error **errp)
1409 {
1410 QString *qstr = qstring_from_str(value);
1411 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp);
1412
1413 qobject_unref(qstr);
1414 return ok;
1415 }
1416
1417 char *object_property_get_str(Object *obj, const char *name,
1418 Error **errp)
1419 {
1420 QObject *ret = object_property_get_qobject(obj, name, errp);
1421 QString *qstring;
1422 char *retval;
1423
1424 if (!ret) {
1425 return NULL;
1426 }
1427 qstring = qobject_to(QString, ret);
1428 if (!qstring) {
1429 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1430 retval = NULL;
1431 } else {
1432 retval = g_strdup(qstring_get_str(qstring));
1433 }
1434
1435 qobject_unref(ret);
1436 return retval;
1437 }
1438
1439 bool object_property_set_link(Object *obj, const char *name,
1440 Object *value, Error **errp)
1441 {
1442 g_autofree char *path = NULL;
1443
1444 if (value) {
1445 path = object_get_canonical_path(value);
1446 }
1447 return object_property_set_str(obj, name, path ?: "", errp);
1448 }
1449
1450 Object *object_property_get_link(Object *obj, const char *name,
1451 Error **errp)
1452 {
1453 char *str = object_property_get_str(obj, name, errp);
1454 Object *target = NULL;
1455
1456 if (str && *str) {
1457 target = object_resolve_path(str, NULL);
1458 if (!target) {
1459 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1460 "Device '%s' not found", str);
1461 }
1462 }
1463
1464 g_free(str);
1465 return target;
1466 }
1467
1468 bool object_property_set_bool(Object *obj, const char *name,
1469 bool value, Error **errp)
1470 {
1471 QBool *qbool = qbool_from_bool(value);
1472 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp);
1473
1474 qobject_unref(qbool);
1475 return ok;
1476 }
1477
1478 bool object_property_get_bool(Object *obj, const char *name,
1479 Error **errp)
1480 {
1481 QObject *ret = object_property_get_qobject(obj, name, errp);
1482 QBool *qbool;
1483 bool retval;
1484
1485 if (!ret) {
1486 return false;
1487 }
1488 qbool = qobject_to(QBool, ret);
1489 if (!qbool) {
1490 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1491 retval = false;
1492 } else {
1493 retval = qbool_get_bool(qbool);
1494 }
1495
1496 qobject_unref(ret);
1497 return retval;
1498 }
1499
1500 bool object_property_set_int(Object *obj, const char *name,
1501 int64_t value, Error **errp)
1502 {
1503 QNum *qnum = qnum_from_int(value);
1504 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1505
1506 qobject_unref(qnum);
1507 return ok;
1508 }
1509
1510 int64_t object_property_get_int(Object *obj, const char *name,
1511 Error **errp)
1512 {
1513 QObject *ret = object_property_get_qobject(obj, name, errp);
1514 QNum *qnum;
1515 int64_t retval;
1516
1517 if (!ret) {
1518 return -1;
1519 }
1520
1521 qnum = qobject_to(QNum, ret);
1522 if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1523 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1524 retval = -1;
1525 }
1526
1527 qobject_unref(ret);
1528 return retval;
1529 }
1530
1531 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1532 {
1533 Visitor *v = qobject_input_visitor_new(prop->defval);
1534
1535 assert(prop->set != NULL);
1536 prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1537
1538 visit_free(v);
1539 }
1540
1541 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1542 {
1543 assert(!prop->defval);
1544 assert(!prop->init);
1545
1546 prop->defval = defval;
1547 prop->init = object_property_init_defval;
1548 }
1549
1550 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1551 {
1552 object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1553 }
1554
1555 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1556 {
1557 object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1558 }
1559
1560 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1561 {
1562 object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1563 }
1564
1565 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1566 {
1567 object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1568 }
1569
1570 bool object_property_set_uint(Object *obj, const char *name,
1571 uint64_t value, Error **errp)
1572 {
1573 QNum *qnum = qnum_from_uint(value);
1574 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1575
1576 qobject_unref(qnum);
1577 return ok;
1578 }
1579
1580 uint64_t object_property_get_uint(Object *obj, const char *name,
1581 Error **errp)
1582 {
1583 QObject *ret = object_property_get_qobject(obj, name, errp);
1584 QNum *qnum;
1585 uint64_t retval;
1586
1587 if (!ret) {
1588 return 0;
1589 }
1590 qnum = qobject_to(QNum, ret);
1591 if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1592 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1593 retval = 0;
1594 }
1595
1596 qobject_unref(ret);
1597 return retval;
1598 }
1599
1600 typedef struct EnumProperty {
1601 const QEnumLookup *lookup;
1602 int (*get)(Object *, Error **);
1603 void (*set)(Object *, int, Error **);
1604 } EnumProperty;
1605
1606 int object_property_get_enum(Object *obj, const char *name,
1607 const char *typename, Error **errp)
1608 {
1609 char *str;
1610 int ret;
1611 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1612 EnumProperty *enumprop;
1613
1614 if (prop == NULL) {
1615 return -1;
1616 }
1617
1618 if (!g_str_equal(prop->type, typename)) {
1619 error_setg(errp, "Property %s on %s is not '%s' enum type",
1620 name, object_class_get_name(
1621 object_get_class(obj)), typename);
1622 return -1;
1623 }
1624
1625 enumprop = prop->opaque;
1626
1627 str = object_property_get_str(obj, name, errp);
1628 if (!str) {
1629 return -1;
1630 }
1631
1632 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1633 g_free(str);
1634
1635 return ret;
1636 }
1637
1638 bool object_property_parse(Object *obj, const char *name,
1639 const char *string, Error **errp)
1640 {
1641 Visitor *v = string_input_visitor_new(string);
1642 bool ok = object_property_set(obj, name, v, errp);
1643
1644 visit_free(v);
1645 return ok;
1646 }
1647
1648 char *object_property_print(Object *obj, const char *name, bool human,
1649 Error **errp)
1650 {
1651 Visitor *v;
1652 char *string = NULL;
1653
1654 v = string_output_visitor_new(human, &string);
1655 if (!object_property_get(obj, name, v, errp)) {
1656 goto out;
1657 }
1658
1659 visit_complete(v, &string);
1660
1661 out:
1662 visit_free(v);
1663 return string;
1664 }
1665
1666 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1667 {
1668 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1669 if (prop == NULL) {
1670 return NULL;
1671 }
1672
1673 return prop->type;
1674 }
1675
1676 Object *object_get_root(void)
1677 {
1678 static Object *root;
1679
1680 if (!root) {
1681 root = object_new("container");
1682 }
1683
1684 return root;
1685 }
1686
1687 Object *object_get_objects_root(void)
1688 {
1689 return container_get(object_get_root(), "/objects");
1690 }
1691
1692 Object *object_get_internal_root(void)
1693 {
1694 static Object *internal_root;
1695
1696 if (!internal_root) {
1697 internal_root = object_new("container");
1698 }
1699
1700 return internal_root;
1701 }
1702
1703 static void object_get_child_property(Object *obj, Visitor *v,
1704 const char *name, void *opaque,
1705 Error **errp)
1706 {
1707 Object *child = opaque;
1708 char *path;
1709
1710 path = object_get_canonical_path(child);
1711 visit_type_str(v, name, &path, errp);
1712 g_free(path);
1713 }
1714
1715 static Object *object_resolve_child_property(Object *parent, void *opaque,
1716 const char *part)
1717 {
1718 return opaque;
1719 }
1720
1721 static void object_finalize_child_property(Object *obj, const char *name,
1722 void *opaque)
1723 {
1724 Object *child = opaque;
1725
1726 if (child->class->unparent) {
1727 (child->class->unparent)(child);
1728 }
1729 child->parent = NULL;
1730 object_unref(child);
1731 }
1732
1733 ObjectProperty *
1734 object_property_try_add_child(Object *obj, const char *name,
1735 Object *child, Error **errp)
1736 {
1737 g_autofree char *type = NULL;
1738 ObjectProperty *op;
1739
1740 assert(!child->parent);
1741
1742 type = g_strdup_printf("child<%s>", object_get_typename(child));
1743
1744 op = object_property_try_add(obj, name, type, object_get_child_property,
1745 NULL, object_finalize_child_property,
1746 child, errp);
1747 if (!op) {
1748 return NULL;
1749 }
1750 op->resolve = object_resolve_child_property;
1751 object_ref(child);
1752 child->parent = obj;
1753 return op;
1754 }
1755
1756 ObjectProperty *
1757 object_property_add_child(Object *obj, const char *name,
1758 Object *child)
1759 {
1760 return object_property_try_add_child(obj, name, child, &error_abort);
1761 }
1762
1763 void object_property_allow_set_link(const Object *obj, const char *name,
1764 Object *val, Error **errp)
1765 {
1766 /* Allow the link to be set, always */
1767 }
1768
1769 typedef struct {
1770 union {
1771 Object **targetp;
1772 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */
1773 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1774 };
1775 void (*check)(const Object *, const char *, Object *, Error **);
1776 ObjectPropertyLinkFlags flags;
1777 } LinkProperty;
1778
1779 static Object **
1780 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1781 {
1782 if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1783 return &lprop->target;
1784 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1785 return (void *)obj + lprop->offset;
1786 } else {
1787 return lprop->targetp;
1788 }
1789 }
1790
1791 static void object_get_link_property(Object *obj, Visitor *v,
1792 const char *name, void *opaque,
1793 Error **errp)
1794 {
1795 LinkProperty *lprop = opaque;
1796 Object **targetp = object_link_get_targetp(obj, lprop);
1797 char *path;
1798
1799 if (*targetp) {
1800 path = object_get_canonical_path(*targetp);
1801 visit_type_str(v, name, &path, errp);
1802 g_free(path);
1803 } else {
1804 path = (char *)"";
1805 visit_type_str(v, name, &path, errp);
1806 }
1807 }
1808
1809 /*
1810 * object_resolve_link:
1811 *
1812 * Lookup an object and ensure its type matches the link property type. This
1813 * is similar to object_resolve_path() except type verification against the
1814 * link property is performed.
1815 *
1816 * Returns: The matched object or NULL on path lookup failures.
1817 */
1818 static Object *object_resolve_link(Object *obj, const char *name,
1819 const char *path, Error **errp)
1820 {
1821 const char *type;
1822 char *target_type;
1823 bool ambiguous = false;
1824 Object *target;
1825
1826 /* Go from link<FOO> to FOO. */
1827 type = object_property_get_type(obj, name, NULL);
1828 target_type = g_strndup(&type[5], strlen(type) - 6);
1829 target = object_resolve_path_type(path, target_type, &ambiguous);
1830
1831 if (ambiguous) {
1832 error_setg(errp, "Path '%s' does not uniquely identify an object",
1833 path);
1834 } else if (!target) {
1835 target = object_resolve_path(path, &ambiguous);
1836 if (target || ambiguous) {
1837 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1838 } else {
1839 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1840 "Device '%s' not found", path);
1841 }
1842 target = NULL;
1843 }
1844 g_free(target_type);
1845
1846 return target;
1847 }
1848
1849 static void object_set_link_property(Object *obj, Visitor *v,
1850 const char *name, void *opaque,
1851 Error **errp)
1852 {
1853 Error *local_err = NULL;
1854 LinkProperty *prop = opaque;
1855 Object **targetp = object_link_get_targetp(obj, prop);
1856 Object *old_target = *targetp;
1857 Object *new_target;
1858 char *path = NULL;
1859
1860 if (!visit_type_str(v, name, &path, errp)) {
1861 return;
1862 }
1863
1864 if (*path) {
1865 new_target = object_resolve_link(obj, name, path, errp);
1866 if (!new_target) {
1867 g_free(path);
1868 return;
1869 }
1870 } else {
1871 new_target = NULL;
1872 }
1873
1874 g_free(path);
1875
1876 prop->check(obj, name, new_target, &local_err);
1877 if (local_err) {
1878 error_propagate(errp, local_err);
1879 return;
1880 }
1881
1882 *targetp = new_target;
1883 if (prop->flags & OBJ_PROP_LINK_STRONG) {
1884 object_ref(new_target);
1885 object_unref(old_target);
1886 }
1887 }
1888
1889 static Object *object_resolve_link_property(Object *parent, void *opaque,
1890 const char *part)
1891 {
1892 LinkProperty *lprop = opaque;
1893
1894 return *object_link_get_targetp(parent, lprop);
1895 }
1896
1897 static void object_release_link_property(Object *obj, const char *name,
1898 void *opaque)
1899 {
1900 LinkProperty *prop = opaque;
1901 Object **targetp = object_link_get_targetp(obj, prop);
1902
1903 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1904 object_unref(*targetp);
1905 }
1906 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1907 g_free(prop);
1908 }
1909 }
1910
1911 static ObjectProperty *
1912 object_add_link_prop(Object *obj, const char *name,
1913 const char *type, void *ptr,
1914 void (*check)(const Object *, const char *,
1915 Object *, Error **),
1916 ObjectPropertyLinkFlags flags)
1917 {
1918 LinkProperty *prop = g_malloc(sizeof(*prop));
1919 g_autofree char *full_type = NULL;
1920 ObjectProperty *op;
1921
1922 if (flags & OBJ_PROP_LINK_DIRECT) {
1923 prop->target = ptr;
1924 } else {
1925 prop->targetp = ptr;
1926 }
1927 prop->check = check;
1928 prop->flags = flags;
1929
1930 full_type = g_strdup_printf("link<%s>", type);
1931
1932 op = object_property_add(obj, name, full_type,
1933 object_get_link_property,
1934 check ? object_set_link_property : NULL,
1935 object_release_link_property,
1936 prop);
1937 op->resolve = object_resolve_link_property;
1938 return op;
1939 }
1940
1941 ObjectProperty *
1942 object_property_add_link(Object *obj, const char *name,
1943 const char *type, Object **targetp,
1944 void (*check)(const Object *, const char *,
1945 Object *, Error **),
1946 ObjectPropertyLinkFlags flags)
1947 {
1948 return object_add_link_prop(obj, name, type, targetp, check, flags);
1949 }
1950
1951 ObjectProperty *
1952 object_class_property_add_link(ObjectClass *oc,
1953 const char *name,
1954 const char *type, ptrdiff_t offset,
1955 void (*check)(const Object *obj, const char *name,
1956 Object *val, Error **errp),
1957 ObjectPropertyLinkFlags flags)
1958 {
1959 LinkProperty *prop = g_new0(LinkProperty, 1);
1960 char *full_type;
1961 ObjectProperty *op;
1962
1963 prop->offset = offset;
1964 prop->check = check;
1965 prop->flags = flags | OBJ_PROP_LINK_CLASS;
1966
1967 full_type = g_strdup_printf("link<%s>", type);
1968
1969 op = object_class_property_add(oc, name, full_type,
1970 object_get_link_property,
1971 check ? object_set_link_property : NULL,
1972 object_release_link_property,
1973 prop);
1974
1975 op->resolve = object_resolve_link_property;
1976
1977 g_free(full_type);
1978 return op;
1979 }
1980
1981 ObjectProperty *
1982 object_property_add_const_link(Object *obj, const char *name,
1983 Object *target)
1984 {
1985 return object_add_link_prop(obj, name,
1986 object_get_typename(target), target,
1987 NULL, OBJ_PROP_LINK_DIRECT);
1988 }
1989
1990 const char *object_get_canonical_path_component(const Object *obj)
1991 {
1992 ObjectProperty *prop = NULL;
1993 GHashTableIter iter;
1994
1995 if (obj->parent == NULL) {
1996 return NULL;
1997 }
1998
1999 g_hash_table_iter_init(&iter, obj->parent->properties);
2000 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2001 if (!object_property_is_child(prop)) {
2002 continue;
2003 }
2004
2005 if (prop->opaque == obj) {
2006 return prop->name;
2007 }
2008 }
2009
2010 /* obj had a parent but was not a child, should never happen */
2011 g_assert_not_reached();
2012 return NULL;
2013 }
2014
2015 char *object_get_canonical_path(const Object *obj)
2016 {
2017 Object *root = object_get_root();
2018 char *newpath, *path = NULL;
2019
2020 if (obj == root) {
2021 return g_strdup("/");
2022 }
2023
2024 do {
2025 const char *component = object_get_canonical_path_component(obj);
2026
2027 if (!component) {
2028 /* A canonical path must be complete, so discard what was
2029 * collected so far.
2030 */
2031 g_free(path);
2032 return NULL;
2033 }
2034
2035 newpath = g_strdup_printf("/%s%s", component, path ? path : "");
2036 g_free(path);
2037 path = newpath;
2038 obj = obj->parent;
2039 } while (obj != root);
2040
2041 return path;
2042 }
2043
2044 Object *object_resolve_path_component(Object *parent, const char *part)
2045 {
2046 ObjectProperty *prop = object_property_find(parent, part);
2047 if (prop == NULL) {
2048 return NULL;
2049 }
2050
2051 if (prop->resolve) {
2052 return prop->resolve(parent, prop->opaque, part);
2053 } else {
2054 return NULL;
2055 }
2056 }
2057
2058 static Object *object_resolve_abs_path(Object *parent,
2059 char **parts,
2060 const char *typename)
2061 {
2062 Object *child;
2063
2064 if (*parts == NULL) {
2065 return object_dynamic_cast(parent, typename);
2066 }
2067
2068 if (strcmp(*parts, "") == 0) {
2069 return object_resolve_abs_path(parent, parts + 1, typename);
2070 }
2071
2072 child = object_resolve_path_component(parent, *parts);
2073 if (!child) {
2074 return NULL;
2075 }
2076
2077 return object_resolve_abs_path(child, parts + 1, typename);
2078 }
2079
2080 static Object *object_resolve_partial_path(Object *parent,
2081 char **parts,
2082 const char *typename,
2083 bool *ambiguous)
2084 {
2085 Object *obj;
2086 GHashTableIter iter;
2087 ObjectProperty *prop;
2088
2089 obj = object_resolve_abs_path(parent, parts, typename);
2090
2091 g_hash_table_iter_init(&iter, parent->properties);
2092 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2093 Object *found;
2094
2095 if (!object_property_is_child(prop)) {
2096 continue;
2097 }
2098
2099 found = object_resolve_partial_path(prop->opaque, parts,
2100 typename, ambiguous);
2101 if (found) {
2102 if (obj) {
2103 *ambiguous = true;
2104 return NULL;
2105 }
2106 obj = found;
2107 }
2108
2109 if (*ambiguous) {
2110 return NULL;
2111 }
2112 }
2113
2114 return obj;
2115 }
2116
2117 Object *object_resolve_path_type(const char *path, const char *typename,
2118 bool *ambiguousp)
2119 {
2120 Object *obj;
2121 char **parts;
2122
2123 parts = g_strsplit(path, "/", 0);
2124 assert(parts);
2125
2126 if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2127 bool ambiguous = false;
2128 obj = object_resolve_partial_path(object_get_root(), parts,
2129 typename, &ambiguous);
2130 if (ambiguousp) {
2131 *ambiguousp = ambiguous;
2132 }
2133 } else {
2134 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2135 }
2136
2137 g_strfreev(parts);
2138
2139 return obj;
2140 }
2141
2142 Object *object_resolve_path(const char *path, bool *ambiguous)
2143 {
2144 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2145 }
2146
2147 typedef struct StringProperty
2148 {
2149 char *(*get)(Object *, Error **);
2150 void (*set)(Object *, const char *, Error **);
2151 } StringProperty;
2152
2153 static void property_get_str(Object *obj, Visitor *v, const char *name,
2154 void *opaque, Error **errp)
2155 {
2156 StringProperty *prop = opaque;
2157 char *value;
2158 Error *err = NULL;
2159
2160 value = prop->get(obj, &err);
2161 if (err) {
2162 error_propagate(errp, err);
2163 return;
2164 }
2165
2166 visit_type_str(v, name, &value, errp);
2167 g_free(value);
2168 }
2169
2170 static void property_set_str(Object *obj, Visitor *v, const char *name,
2171 void *opaque, Error **errp)
2172 {
2173 StringProperty *prop = opaque;
2174 char *value;
2175
2176 if (!visit_type_str(v, name, &value, errp)) {
2177 return;
2178 }
2179
2180 prop->set(obj, value, errp);
2181 g_free(value);
2182 }
2183
2184 static void property_release_data(Object *obj, const char *name,
2185 void *opaque)
2186 {
2187 g_free(opaque);
2188 }
2189
2190 ObjectProperty *
2191 object_property_add_str(Object *obj, const char *name,
2192 char *(*get)(Object *, Error **),
2193 void (*set)(Object *, const char *, Error **))
2194 {
2195 StringProperty *prop = g_malloc0(sizeof(*prop));
2196
2197 prop->get = get;
2198 prop->set = set;
2199
2200 return object_property_add(obj, name, "string",
2201 get ? property_get_str : NULL,
2202 set ? property_set_str : NULL,
2203 property_release_data,
2204 prop);
2205 }
2206
2207 ObjectProperty *
2208 object_class_property_add_str(ObjectClass *klass, const char *name,
2209 char *(*get)(Object *, Error **),
2210 void (*set)(Object *, const char *,
2211 Error **))
2212 {
2213 StringProperty *prop = g_malloc0(sizeof(*prop));
2214
2215 prop->get = get;
2216 prop->set = set;
2217
2218 return object_class_property_add(klass, name, "string",
2219 get ? property_get_str : NULL,
2220 set ? property_set_str : NULL,
2221 NULL,
2222 prop);
2223 }
2224
2225 typedef struct BoolProperty
2226 {
2227 bool (*get)(Object *, Error **);
2228 void (*set)(Object *, bool, Error **);
2229 } BoolProperty;
2230
2231 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2232 void *opaque, Error **errp)
2233 {
2234 BoolProperty *prop = opaque;
2235 bool value;
2236 Error *err = NULL;
2237
2238 value = prop->get(obj, &err);
2239 if (err) {
2240 error_propagate(errp, err);
2241 return;
2242 }
2243
2244 visit_type_bool(v, name, &value, errp);
2245 }
2246
2247 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2248 void *opaque, Error **errp)
2249 {
2250 BoolProperty *prop = opaque;
2251 bool value;
2252
2253 if (!visit_type_bool(v, name, &value, errp)) {
2254 return;
2255 }
2256
2257 prop->set(obj, value, errp);
2258 }
2259
2260 ObjectProperty *
2261 object_property_add_bool(Object *obj, const char *name,
2262 bool (*get)(Object *, Error **),
2263 void (*set)(Object *, bool, Error **))
2264 {
2265 BoolProperty *prop = g_malloc0(sizeof(*prop));
2266
2267 prop->get = get;
2268 prop->set = set;
2269
2270 return object_property_add(obj, name, "bool",
2271 get ? property_get_bool : NULL,
2272 set ? property_set_bool : NULL,
2273 property_release_data,
2274 prop);
2275 }
2276
2277 ObjectProperty *
2278 object_class_property_add_bool(ObjectClass *klass, const char *name,
2279 bool (*get)(Object *, Error **),
2280 void (*set)(Object *, bool, Error **))
2281 {
2282 BoolProperty *prop = g_malloc0(sizeof(*prop));
2283
2284 prop->get = get;
2285 prop->set = set;
2286
2287 return object_class_property_add(klass, name, "bool",
2288 get ? property_get_bool : NULL,
2289 set ? property_set_bool : NULL,
2290 NULL,
2291 prop);
2292 }
2293
2294 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2295 void *opaque, Error **errp)
2296 {
2297 EnumProperty *prop = opaque;
2298 int value;
2299 Error *err = NULL;
2300
2301 value = prop->get(obj, &err);
2302 if (err) {
2303 error_propagate(errp, err);
2304 return;
2305 }
2306
2307 visit_type_enum(v, name, &value, prop->lookup, errp);
2308 }
2309
2310 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2311 void *opaque, Error **errp)
2312 {
2313 EnumProperty *prop = opaque;
2314 int value;
2315
2316 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) {
2317 return;
2318 }
2319 prop->set(obj, value, errp);
2320 }
2321
2322 ObjectProperty *
2323 object_property_add_enum(Object *obj, const char *name,
2324 const char *typename,
2325 const QEnumLookup *lookup,
2326 int (*get)(Object *, Error **),
2327 void (*set)(Object *, int, Error **))
2328 {
2329 EnumProperty *prop = g_malloc(sizeof(*prop));
2330
2331 prop->lookup = lookup;
2332 prop->get = get;
2333 prop->set = set;
2334
2335 return object_property_add(obj, name, typename,
2336 get ? property_get_enum : NULL,
2337 set ? property_set_enum : NULL,
2338 property_release_data,
2339 prop);
2340 }
2341
2342 ObjectProperty *
2343 object_class_property_add_enum(ObjectClass *klass, const char *name,
2344 const char *typename,
2345 const QEnumLookup *lookup,
2346 int (*get)(Object *, Error **),
2347 void (*set)(Object *, int, Error **))
2348 {
2349 EnumProperty *prop = g_malloc(sizeof(*prop));
2350
2351 prop->lookup = lookup;
2352 prop->get = get;
2353 prop->set = set;
2354
2355 return object_class_property_add(klass, name, typename,
2356 get ? property_get_enum : NULL,
2357 set ? property_set_enum : NULL,
2358 NULL,
2359 prop);
2360 }
2361
2362 typedef struct TMProperty {
2363 void (*get)(Object *, struct tm *, Error **);
2364 } TMProperty;
2365
2366 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2367 void *opaque, Error **errp)
2368 {
2369 TMProperty *prop = opaque;
2370 Error *err = NULL;
2371 struct tm value;
2372
2373 prop->get(obj, &value, &err);
2374 if (err) {
2375 error_propagate(errp, err);
2376 return;
2377 }
2378
2379 if (!visit_start_struct(v, name, NULL, 0, errp)) {
2380 return;
2381 }
2382 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
2383 goto out_end;
2384 }
2385 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
2386 goto out_end;
2387 }
2388 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
2389 goto out_end;
2390 }
2391 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
2392 goto out_end;
2393 }
2394 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
2395 goto out_end;
2396 }
2397 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
2398 goto out_end;
2399 }
2400 visit_check_struct(v, errp);
2401 out_end:
2402 visit_end_struct(v, NULL);
2403 }
2404
2405 ObjectProperty *
2406 object_property_add_tm(Object *obj, const char *name,
2407 void (*get)(Object *, struct tm *, Error **))
2408 {
2409 TMProperty *prop = g_malloc0(sizeof(*prop));
2410
2411 prop->get = get;
2412
2413 return object_property_add(obj, name, "struct tm",
2414 get ? property_get_tm : NULL, NULL,
2415 property_release_data,
2416 prop);
2417 }
2418
2419 ObjectProperty *
2420 object_class_property_add_tm(ObjectClass *klass, const char *name,
2421 void (*get)(Object *, struct tm *, Error **))
2422 {
2423 TMProperty *prop = g_malloc0(sizeof(*prop));
2424
2425 prop->get = get;
2426
2427 return object_class_property_add(klass, name, "struct tm",
2428 get ? property_get_tm : NULL,
2429 NULL, NULL, prop);
2430 }
2431
2432 static char *object_get_type(Object *obj, Error **errp)
2433 {
2434 return g_strdup(object_get_typename(obj));
2435 }
2436
2437 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2438 void *opaque, Error **errp)
2439 {
2440 uint8_t value = *(uint8_t *)opaque;
2441 visit_type_uint8(v, name, &value, errp);
2442 }
2443
2444 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2445 void *opaque, Error **errp)
2446 {
2447 uint8_t *field = opaque;
2448 uint8_t value;
2449
2450 if (!visit_type_uint8(v, name, &value, errp)) {
2451 return;
2452 }
2453
2454 *field = value;
2455 }
2456
2457 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2458 void *opaque, Error **errp)
2459 {
2460 uint16_t value = *(uint16_t *)opaque;
2461 visit_type_uint16(v, name, &value, errp);
2462 }
2463
2464 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2465 void *opaque, Error **errp)
2466 {
2467 uint16_t *field = opaque;
2468 uint16_t value;
2469
2470 if (!visit_type_uint16(v, name, &value, errp)) {
2471 return;
2472 }
2473
2474 *field = value;
2475 }
2476
2477 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2478 void *opaque, Error **errp)
2479 {
2480 uint32_t value = *(uint32_t *)opaque;
2481 visit_type_uint32(v, name, &value, errp);
2482 }
2483
2484 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2485 void *opaque, Error **errp)
2486 {
2487 uint32_t *field = opaque;
2488 uint32_t value;
2489
2490 if (!visit_type_uint32(v, name, &value, errp)) {
2491 return;
2492 }
2493
2494 *field = value;
2495 }
2496
2497 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2498 void *opaque, Error **errp)
2499 {
2500 uint64_t value = *(uint64_t *)opaque;
2501 visit_type_uint64(v, name, &value, errp);
2502 }
2503
2504 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2505 void *opaque, Error **errp)
2506 {
2507 uint64_t *field = opaque;
2508 uint64_t value;
2509
2510 if (!visit_type_uint64(v, name, &value, errp)) {
2511 return;
2512 }
2513
2514 *field = value;
2515 }
2516
2517 ObjectProperty *
2518 object_property_add_uint8_ptr(Object *obj, const char *name,
2519 const uint8_t *v,
2520 ObjectPropertyFlags flags)
2521 {
2522 ObjectPropertyAccessor *getter = NULL;
2523 ObjectPropertyAccessor *setter = NULL;
2524
2525 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2526 getter = property_get_uint8_ptr;
2527 }
2528
2529 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2530 setter = property_set_uint8_ptr;
2531 }
2532
2533 return object_property_add(obj, name, "uint8",
2534 getter, setter, NULL, (void *)v);
2535 }
2536
2537 ObjectProperty *
2538 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2539 const uint8_t *v,
2540 ObjectPropertyFlags flags)
2541 {
2542 ObjectPropertyAccessor *getter = NULL;
2543 ObjectPropertyAccessor *setter = NULL;
2544
2545 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2546 getter = property_get_uint8_ptr;
2547 }
2548
2549 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2550 setter = property_set_uint8_ptr;
2551 }
2552
2553 return object_class_property_add(klass, name, "uint8",
2554 getter, setter, NULL, (void *)v);
2555 }
2556
2557 ObjectProperty *
2558 object_property_add_uint16_ptr(Object *obj, const char *name,
2559 const uint16_t *v,
2560 ObjectPropertyFlags flags)
2561 {
2562 ObjectPropertyAccessor *getter = NULL;
2563 ObjectPropertyAccessor *setter = NULL;
2564
2565 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2566 getter = property_get_uint16_ptr;
2567 }
2568
2569 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2570 setter = property_set_uint16_ptr;
2571 }
2572
2573 return object_property_add(obj, name, "uint16",
2574 getter, setter, NULL, (void *)v);
2575 }
2576
2577 ObjectProperty *
2578 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2579 const uint16_t *v,
2580 ObjectPropertyFlags flags)
2581 {
2582 ObjectPropertyAccessor *getter = NULL;
2583 ObjectPropertyAccessor *setter = NULL;
2584
2585 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2586 getter = property_get_uint16_ptr;
2587 }
2588
2589 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2590 setter = property_set_uint16_ptr;
2591 }
2592
2593 return object_class_property_add(klass, name, "uint16",
2594 getter, setter, NULL, (void *)v);
2595 }
2596
2597 ObjectProperty *
2598 object_property_add_uint32_ptr(Object *obj, const char *name,
2599 const uint32_t *v,
2600 ObjectPropertyFlags flags)
2601 {
2602 ObjectPropertyAccessor *getter = NULL;
2603 ObjectPropertyAccessor *setter = NULL;
2604
2605 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2606 getter = property_get_uint32_ptr;
2607 }
2608
2609 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2610 setter = property_set_uint32_ptr;
2611 }
2612
2613 return object_property_add(obj, name, "uint32",
2614 getter, setter, NULL, (void *)v);
2615 }
2616
2617 ObjectProperty *
2618 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2619 const uint32_t *v,
2620 ObjectPropertyFlags flags)
2621 {
2622 ObjectPropertyAccessor *getter = NULL;
2623 ObjectPropertyAccessor *setter = NULL;
2624
2625 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2626 getter = property_get_uint32_ptr;
2627 }
2628
2629 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2630 setter = property_set_uint32_ptr;
2631 }
2632
2633 return object_class_property_add(klass, name, "uint32",
2634 getter, setter, NULL, (void *)v);
2635 }
2636
2637 ObjectProperty *
2638 object_property_add_uint64_ptr(Object *obj, const char *name,
2639 const uint64_t *v,
2640 ObjectPropertyFlags flags)
2641 {
2642 ObjectPropertyAccessor *getter = NULL;
2643 ObjectPropertyAccessor *setter = NULL;
2644
2645 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2646 getter = property_get_uint64_ptr;
2647 }
2648
2649 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2650 setter = property_set_uint64_ptr;
2651 }
2652
2653 return object_property_add(obj, name, "uint64",
2654 getter, setter, NULL, (void *)v);
2655 }
2656
2657 ObjectProperty *
2658 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2659 const uint64_t *v,
2660 ObjectPropertyFlags flags)
2661 {
2662 ObjectPropertyAccessor *getter = NULL;
2663 ObjectPropertyAccessor *setter = NULL;
2664
2665 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2666 getter = property_get_uint64_ptr;
2667 }
2668
2669 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2670 setter = property_set_uint64_ptr;
2671 }
2672
2673 return object_class_property_add(klass, name, "uint64",
2674 getter, setter, NULL, (void *)v);
2675 }
2676
2677 typedef struct {
2678 Object *target_obj;
2679 char *target_name;
2680 } AliasProperty;
2681
2682 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2683 void *opaque, Error **errp)
2684 {
2685 AliasProperty *prop = opaque;
2686
2687 object_property_get(prop->target_obj, prop->target_name, v, errp);
2688 }
2689
2690 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2691 void *opaque, Error **errp)
2692 {
2693 AliasProperty *prop = opaque;
2694
2695 object_property_set(prop->target_obj, prop->target_name, v, errp);
2696 }
2697
2698 static Object *property_resolve_alias(Object *obj, void *opaque,
2699 const char *part)
2700 {
2701 AliasProperty *prop = opaque;
2702
2703 return object_resolve_path_component(prop->target_obj, prop->target_name);
2704 }
2705
2706 static void property_release_alias(Object *obj, const char *name, void *opaque)
2707 {
2708 AliasProperty *prop = opaque;
2709
2710 g_free(prop->target_name);
2711 g_free(prop);
2712 }
2713
2714 ObjectProperty *
2715 object_property_add_alias(Object *obj, const char *name,
2716 Object *target_obj, const char *target_name)
2717 {
2718 AliasProperty *prop;
2719 ObjectProperty *op;
2720 ObjectProperty *target_prop;
2721 g_autofree char *prop_type = NULL;
2722
2723 target_prop = object_property_find_err(target_obj, target_name,
2724 &error_abort);
2725
2726 if (object_property_is_child(target_prop)) {
2727 prop_type = g_strdup_printf("link%s",
2728 target_prop->type + strlen("child"));
2729 } else {
2730 prop_type = g_strdup(target_prop->type);
2731 }
2732
2733 prop = g_malloc(sizeof(*prop));
2734 prop->target_obj = target_obj;
2735 prop->target_name = g_strdup(target_name);
2736
2737 op = object_property_add(obj, name, prop_type,
2738 property_get_alias,
2739 property_set_alias,
2740 property_release_alias,
2741 prop);
2742 op->resolve = property_resolve_alias;
2743 if (target_prop->defval) {
2744 op->defval = qobject_ref(target_prop->defval);
2745 }
2746
2747 object_property_set_description(obj, op->name,
2748 target_prop->description);
2749 return op;
2750 }
2751
2752 void object_property_set_description(Object *obj, const char *name,
2753 const char *description)
2754 {
2755 ObjectProperty *op;
2756
2757 op = object_property_find_err(obj, name, &error_abort);
2758 g_free(op->description);
2759 op->description = g_strdup(description);
2760 }
2761
2762 void object_class_property_set_description(ObjectClass *klass,
2763 const char *name,
2764 const char *description)
2765 {
2766 ObjectProperty *op;
2767
2768 op = g_hash_table_lookup(klass->properties, name);
2769 g_free(op->description);
2770 op->description = g_strdup(description);
2771 }
2772
2773 static void object_class_init(ObjectClass *klass, void *data)
2774 {
2775 object_class_property_add_str(klass, "type", object_get_type,
2776 NULL);
2777 }
2778
2779 static void register_types(void)
2780 {
2781 static TypeInfo interface_info = {
2782 .name = TYPE_INTERFACE,
2783 .class_size = sizeof(InterfaceClass),
2784 .abstract = true,
2785 };
2786
2787 static TypeInfo object_info = {
2788 .name = TYPE_OBJECT,
2789 .instance_size = sizeof(Object),
2790 .class_init = object_class_init,
2791 .abstract = true,
2792 };
2793
2794 type_interface = type_register_internal(&interface_info);
2795 type_register_internal(&object_info);
2796 }
2797
2798 type_init(register_types)