qom: Allow objects to be allocated with increased alignment
[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, NULL)) {
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, const char *value)
446 {
447 GlobalProperty *g;
448 if (!object_compat_props[2]) {
449 object_compat_props[2] = g_ptr_array_new();
450 }
451 g = g_new0(GlobalProperty, 1);
452 g->driver = g_strdup(driver);
453 g->property = g_strdup(prop);
454 g->value = g_strdup(value);
455 g_ptr_array_add(object_compat_props[2], g);
456 }
457
458 /*
459 * Set machine's global property defaults to @compat_props.
460 * May be called at most once.
461 */
462 void object_set_machine_compat_props(GPtrArray *compat_props)
463 {
464 assert(!object_compat_props[1]);
465 object_compat_props[1] = compat_props;
466 }
467
468 /*
469 * Set accelerator's global property defaults to @compat_props.
470 * May be called at most once.
471 */
472 void object_set_accelerator_compat_props(GPtrArray *compat_props)
473 {
474 assert(!object_compat_props[0]);
475 object_compat_props[0] = compat_props;
476 }
477
478 void object_apply_compat_props(Object *obj)
479 {
480 int i;
481
482 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
483 object_apply_global_props(obj, object_compat_props[i],
484 i == 2 ? &error_fatal : &error_abort);
485 }
486 }
487
488 static void object_class_property_init_all(Object *obj)
489 {
490 ObjectPropertyIterator iter;
491 ObjectProperty *prop;
492
493 object_class_property_iter_init(&iter, object_get_class(obj));
494 while ((prop = object_property_iter_next(&iter))) {
495 if (prop->init) {
496 prop->init(obj, prop);
497 }
498 }
499 }
500
501 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
502 {
503 type_initialize(type);
504
505 g_assert(type->instance_size >= sizeof(Object));
506 g_assert(type->abstract == false);
507 g_assert(size >= type->instance_size);
508
509 memset(obj, 0, type->instance_size);
510 obj->class = type->class;
511 object_ref(obj);
512 object_class_property_init_all(obj);
513 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
514 NULL, object_property_free);
515 object_init_with_type(obj, type);
516 object_post_init_with_type(obj, type);
517 }
518
519 void object_initialize(void *data, size_t size, const char *typename)
520 {
521 TypeImpl *type = type_get_by_name(typename);
522
523 #ifdef CONFIG_MODULES
524 if (!type) {
525 module_load_qom_one(typename);
526 type = type_get_by_name(typename);
527 }
528 #endif
529 if (!type) {
530 error_report("missing object type '%s'", typename);
531 abort();
532 }
533
534 object_initialize_with_type(data, size, type);
535 }
536
537 bool object_initialize_child_with_props(Object *parentobj,
538 const char *propname,
539 void *childobj, size_t size,
540 const char *type,
541 Error **errp, ...)
542 {
543 va_list vargs;
544 bool ok;
545
546 va_start(vargs, errp);
547 ok = object_initialize_child_with_propsv(parentobj, propname,
548 childobj, size, type, errp,
549 vargs);
550 va_end(vargs);
551 return ok;
552 }
553
554 bool object_initialize_child_with_propsv(Object *parentobj,
555 const char *propname,
556 void *childobj, size_t size,
557 const char *type,
558 Error **errp, va_list vargs)
559 {
560 bool ok = false;
561 Object *obj;
562 UserCreatable *uc;
563
564 object_initialize(childobj, size, type);
565 obj = OBJECT(childobj);
566
567 if (!object_set_propv(obj, errp, vargs)) {
568 goto out;
569 }
570
571 object_property_add_child(parentobj, propname, obj);
572
573 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
574 if (uc) {
575 if (!user_creatable_complete(uc, errp)) {
576 object_unparent(obj);
577 goto out;
578 }
579 }
580
581 ok = true;
582
583 out:
584 /*
585 * We want @obj's reference to be 1 on success, 0 on failure.
586 * On success, it's 2: one taken by object_initialize(), and one
587 * by object_property_add_child().
588 * On failure in object_initialize() or earlier, it's 1.
589 * On failure afterwards, it's also 1: object_unparent() releases
590 * the reference taken by object_property_add_child().
591 */
592 object_unref(obj);
593 return ok;
594 }
595
596 void object_initialize_child_internal(Object *parent,
597 const char *propname,
598 void *child, size_t size,
599 const char *type)
600 {
601 object_initialize_child_with_props(parent, propname, child, size, type,
602 &error_abort, NULL);
603 }
604
605 static inline bool object_property_is_child(ObjectProperty *prop)
606 {
607 return strstart(prop->type, "child<", NULL);
608 }
609
610 static void object_property_del_all(Object *obj)
611 {
612 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
613 ObjectProperty *prop;
614 ObjectPropertyIterator iter;
615 bool released;
616
617 do {
618 released = false;
619 object_property_iter_init(&iter, obj);
620 while ((prop = object_property_iter_next(&iter)) != NULL) {
621 if (g_hash_table_add(done, prop)) {
622 if (prop->release) {
623 prop->release(obj, prop->name, prop->opaque);
624 released = true;
625 break;
626 }
627 }
628 }
629 } while (released);
630
631 g_hash_table_unref(obj->properties);
632 }
633
634 static void object_property_del_child(Object *obj, Object *child)
635 {
636 ObjectProperty *prop;
637 GHashTableIter iter;
638 gpointer key, value;
639
640 g_hash_table_iter_init(&iter, obj->properties);
641 while (g_hash_table_iter_next(&iter, &key, &value)) {
642 prop = value;
643 if (object_property_is_child(prop) && prop->opaque == child) {
644 if (prop->release) {
645 prop->release(obj, prop->name, prop->opaque);
646 prop->release = NULL;
647 }
648 break;
649 }
650 }
651 g_hash_table_iter_init(&iter, obj->properties);
652 while (g_hash_table_iter_next(&iter, &key, &value)) {
653 prop = value;
654 if (object_property_is_child(prop) && prop->opaque == child) {
655 g_hash_table_iter_remove(&iter);
656 break;
657 }
658 }
659 }
660
661 void object_unparent(Object *obj)
662 {
663 if (obj->parent) {
664 object_property_del_child(obj->parent, obj);
665 }
666 }
667
668 static void object_deinit(Object *obj, TypeImpl *type)
669 {
670 if (type->instance_finalize) {
671 type->instance_finalize(obj);
672 }
673
674 if (type_has_parent(type)) {
675 object_deinit(obj, type_get_parent(type));
676 }
677 }
678
679 static void object_finalize(void *data)
680 {
681 Object *obj = data;
682 TypeImpl *ti = obj->class->type;
683
684 object_property_del_all(obj);
685 object_deinit(obj, ti);
686
687 g_assert(obj->ref == 0);
688 if (obj->free) {
689 obj->free(obj);
690 }
691 }
692
693 /* Find the minimum alignment guaranteed by the system malloc. */
694 #if __STDC_VERSION__ >= 201112L
695 typddef max_align_t qemu_max_align_t;
696 #else
697 typedef union {
698 long l;
699 void *p;
700 double d;
701 long double ld;
702 } qemu_max_align_t;
703 #endif
704
705 static Object *object_new_with_type(Type type)
706 {
707 Object *obj;
708 size_t size, align;
709 void (*obj_free)(void *);
710
711 g_assert(type != NULL);
712 type_initialize(type);
713
714 size = type->instance_size;
715 align = type->instance_align;
716
717 /*
718 * Do not use qemu_memalign unless required. Depending on the
719 * implementation, extra alignment implies extra overhead.
720 */
721 if (likely(align <= __alignof__(qemu_max_align_t))) {
722 obj = g_malloc(size);
723 obj_free = g_free;
724 } else {
725 obj = qemu_memalign(align, size);
726 obj_free = qemu_vfree;
727 }
728
729 object_initialize_with_type(obj, size, type);
730 obj->free = obj_free;
731
732 return obj;
733 }
734
735 Object *object_new_with_class(ObjectClass *klass)
736 {
737 return object_new_with_type(klass->type);
738 }
739
740 Object *object_new(const char *typename)
741 {
742 TypeImpl *ti = type_get_by_name(typename);
743
744 return object_new_with_type(ti);
745 }
746
747
748 Object *object_new_with_props(const char *typename,
749 Object *parent,
750 const char *id,
751 Error **errp,
752 ...)
753 {
754 va_list vargs;
755 Object *obj;
756
757 va_start(vargs, errp);
758 obj = object_new_with_propv(typename, parent, id, errp, vargs);
759 va_end(vargs);
760
761 return obj;
762 }
763
764
765 Object *object_new_with_propv(const char *typename,
766 Object *parent,
767 const char *id,
768 Error **errp,
769 va_list vargs)
770 {
771 Object *obj;
772 ObjectClass *klass;
773 UserCreatable *uc;
774
775 klass = object_class_by_name(typename);
776 if (!klass) {
777 error_setg(errp, "invalid object type: %s", typename);
778 return NULL;
779 }
780
781 if (object_class_is_abstract(klass)) {
782 error_setg(errp, "object type '%s' is abstract", typename);
783 return NULL;
784 }
785 obj = object_new_with_type(klass->type);
786
787 if (!object_set_propv(obj, errp, vargs)) {
788 goto error;
789 }
790
791 if (id != NULL) {
792 object_property_add_child(parent, id, obj);
793 }
794
795 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
796 if (uc) {
797 if (!user_creatable_complete(uc, errp)) {
798 if (id != NULL) {
799 object_unparent(obj);
800 }
801 goto error;
802 }
803 }
804
805 object_unref(obj);
806 return obj;
807
808 error:
809 object_unref(obj);
810 return NULL;
811 }
812
813
814 bool object_set_props(Object *obj,
815 Error **errp,
816 ...)
817 {
818 va_list vargs;
819 bool ret;
820
821 va_start(vargs, errp);
822 ret = object_set_propv(obj, errp, vargs);
823 va_end(vargs);
824
825 return ret;
826 }
827
828
829 bool object_set_propv(Object *obj,
830 Error **errp,
831 va_list vargs)
832 {
833 const char *propname;
834
835 propname = va_arg(vargs, char *);
836 while (propname != NULL) {
837 const char *value = va_arg(vargs, char *);
838
839 g_assert(value != NULL);
840 if (!object_property_parse(obj, propname, value, errp)) {
841 return false;
842 }
843 propname = va_arg(vargs, char *);
844 }
845
846 return true;
847 }
848
849
850 Object *object_dynamic_cast(Object *obj, const char *typename)
851 {
852 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
853 return obj;
854 }
855
856 return NULL;
857 }
858
859 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
860 const char *file, int line, const char *func)
861 {
862 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
863 typename, file, line, func);
864
865 #ifdef CONFIG_QOM_CAST_DEBUG
866 int i;
867 Object *inst;
868
869 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
870 if (atomic_read(&obj->class->object_cast_cache[i]) == typename) {
871 goto out;
872 }
873 }
874
875 inst = object_dynamic_cast(obj, typename);
876
877 if (!inst && obj) {
878 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
879 file, line, func, obj, typename);
880 abort();
881 }
882
883 assert(obj == inst);
884
885 if (obj && obj == inst) {
886 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
887 atomic_set(&obj->class->object_cast_cache[i - 1],
888 atomic_read(&obj->class->object_cast_cache[i]));
889 }
890 atomic_set(&obj->class->object_cast_cache[i - 1], typename);
891 }
892
893 out:
894 #endif
895 return obj;
896 }
897
898 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
899 const char *typename)
900 {
901 ObjectClass *ret = NULL;
902 TypeImpl *target_type;
903 TypeImpl *type;
904
905 if (!class) {
906 return NULL;
907 }
908
909 /* A simple fast path that can trigger a lot for leaf classes. */
910 type = class->type;
911 if (type->name == typename) {
912 return class;
913 }
914
915 target_type = type_get_by_name(typename);
916 if (!target_type) {
917 /* target class type unknown, so fail the cast */
918 return NULL;
919 }
920
921 if (type->class->interfaces &&
922 type_is_ancestor(target_type, type_interface)) {
923 int found = 0;
924 GSList *i;
925
926 for (i = class->interfaces; i; i = i->next) {
927 ObjectClass *target_class = i->data;
928
929 if (type_is_ancestor(target_class->type, target_type)) {
930 ret = target_class;
931 found++;
932 }
933 }
934
935 /* The match was ambiguous, don't allow a cast */
936 if (found > 1) {
937 ret = NULL;
938 }
939 } else if (type_is_ancestor(type, target_type)) {
940 ret = class;
941 }
942
943 return ret;
944 }
945
946 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
947 const char *typename,
948 const char *file, int line,
949 const char *func)
950 {
951 ObjectClass *ret;
952
953 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
954 typename, file, line, func);
955
956 #ifdef CONFIG_QOM_CAST_DEBUG
957 int i;
958
959 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
960 if (atomic_read(&class->class_cast_cache[i]) == typename) {
961 ret = class;
962 goto out;
963 }
964 }
965 #else
966 if (!class || !class->interfaces) {
967 return class;
968 }
969 #endif
970
971 ret = object_class_dynamic_cast(class, typename);
972 if (!ret && class) {
973 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
974 file, line, func, class, typename);
975 abort();
976 }
977
978 #ifdef CONFIG_QOM_CAST_DEBUG
979 if (class && ret == class) {
980 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
981 atomic_set(&class->class_cast_cache[i - 1],
982 atomic_read(&class->class_cast_cache[i]));
983 }
984 atomic_set(&class->class_cast_cache[i - 1], typename);
985 }
986 out:
987 #endif
988 return ret;
989 }
990
991 const char *object_get_typename(const Object *obj)
992 {
993 return obj->class->type->name;
994 }
995
996 ObjectClass *object_get_class(Object *obj)
997 {
998 return obj->class;
999 }
1000
1001 bool object_class_is_abstract(ObjectClass *klass)
1002 {
1003 return klass->type->abstract;
1004 }
1005
1006 const char *object_class_get_name(ObjectClass *klass)
1007 {
1008 return klass->type->name;
1009 }
1010
1011 ObjectClass *object_class_by_name(const char *typename)
1012 {
1013 TypeImpl *type = type_get_by_name(typename);
1014
1015 if (!type) {
1016 return NULL;
1017 }
1018
1019 type_initialize(type);
1020
1021 return type->class;
1022 }
1023
1024 ObjectClass *module_object_class_by_name(const char *typename)
1025 {
1026 ObjectClass *oc;
1027
1028 oc = object_class_by_name(typename);
1029 #ifdef CONFIG_MODULES
1030 if (!oc) {
1031 module_load_qom_one(typename);
1032 oc = object_class_by_name(typename);
1033 }
1034 #endif
1035 return oc;
1036 }
1037
1038 ObjectClass *object_class_get_parent(ObjectClass *class)
1039 {
1040 TypeImpl *type = type_get_parent(class->type);
1041
1042 if (!type) {
1043 return NULL;
1044 }
1045
1046 type_initialize(type);
1047
1048 return type->class;
1049 }
1050
1051 typedef struct OCFData
1052 {
1053 void (*fn)(ObjectClass *klass, void *opaque);
1054 const char *implements_type;
1055 bool include_abstract;
1056 void *opaque;
1057 } OCFData;
1058
1059 static void object_class_foreach_tramp(gpointer key, gpointer value,
1060 gpointer opaque)
1061 {
1062 OCFData *data = opaque;
1063 TypeImpl *type = value;
1064 ObjectClass *k;
1065
1066 type_initialize(type);
1067 k = type->class;
1068
1069 if (!data->include_abstract && type->abstract) {
1070 return;
1071 }
1072
1073 if (data->implements_type &&
1074 !object_class_dynamic_cast(k, data->implements_type)) {
1075 return;
1076 }
1077
1078 data->fn(k, data->opaque);
1079 }
1080
1081 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1082 const char *implements_type, bool include_abstract,
1083 void *opaque)
1084 {
1085 OCFData data = { fn, implements_type, include_abstract, opaque };
1086
1087 enumerating_types = true;
1088 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1089 enumerating_types = false;
1090 }
1091
1092 static int do_object_child_foreach(Object *obj,
1093 int (*fn)(Object *child, void *opaque),
1094 void *opaque, bool recurse)
1095 {
1096 GHashTableIter iter;
1097 ObjectProperty *prop;
1098 int ret = 0;
1099
1100 g_hash_table_iter_init(&iter, obj->properties);
1101 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1102 if (object_property_is_child(prop)) {
1103 Object *child = prop->opaque;
1104
1105 ret = fn(child, opaque);
1106 if (ret != 0) {
1107 break;
1108 }
1109 if (recurse) {
1110 ret = do_object_child_foreach(child, fn, opaque, true);
1111 if (ret != 0) {
1112 break;
1113 }
1114 }
1115 }
1116 }
1117 return ret;
1118 }
1119
1120 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1121 void *opaque)
1122 {
1123 return do_object_child_foreach(obj, fn, opaque, false);
1124 }
1125
1126 int object_child_foreach_recursive(Object *obj,
1127 int (*fn)(Object *child, void *opaque),
1128 void *opaque)
1129 {
1130 return do_object_child_foreach(obj, fn, opaque, true);
1131 }
1132
1133 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1134 {
1135 GSList **list = opaque;
1136
1137 *list = g_slist_prepend(*list, klass);
1138 }
1139
1140 GSList *object_class_get_list(const char *implements_type,
1141 bool include_abstract)
1142 {
1143 GSList *list = NULL;
1144
1145 object_class_foreach(object_class_get_list_tramp,
1146 implements_type, include_abstract, &list);
1147 return list;
1148 }
1149
1150 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1151 {
1152 return strcasecmp(object_class_get_name((ObjectClass *)a),
1153 object_class_get_name((ObjectClass *)b));
1154 }
1155
1156 GSList *object_class_get_list_sorted(const char *implements_type,
1157 bool include_abstract)
1158 {
1159 return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1160 object_class_cmp);
1161 }
1162
1163 Object *object_ref(void *objptr)
1164 {
1165 Object *obj = OBJECT(objptr);
1166 if (!obj) {
1167 return NULL;
1168 }
1169 atomic_inc(&obj->ref);
1170 return obj;
1171 }
1172
1173 void object_unref(void *objptr)
1174 {
1175 Object *obj = OBJECT(objptr);
1176 if (!obj) {
1177 return;
1178 }
1179 g_assert(obj->ref > 0);
1180
1181 /* parent always holds a reference to its children */
1182 if (atomic_fetch_dec(&obj->ref) == 1) {
1183 object_finalize(obj);
1184 }
1185 }
1186
1187 ObjectProperty *
1188 object_property_try_add(Object *obj, const char *name, const char *type,
1189 ObjectPropertyAccessor *get,
1190 ObjectPropertyAccessor *set,
1191 ObjectPropertyRelease *release,
1192 void *opaque, Error **errp)
1193 {
1194 ObjectProperty *prop;
1195 size_t name_len = strlen(name);
1196
1197 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1198 int i;
1199 ObjectProperty *ret;
1200 char *name_no_array = g_strdup(name);
1201
1202 name_no_array[name_len - 3] = '\0';
1203 for (i = 0; ; ++i) {
1204 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1205
1206 ret = object_property_try_add(obj, full_name, type, get, set,
1207 release, opaque, NULL);
1208 g_free(full_name);
1209 if (ret) {
1210 break;
1211 }
1212 }
1213 g_free(name_no_array);
1214 return ret;
1215 }
1216
1217 if (object_property_find(obj, name, NULL) != NULL) {
1218 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1219 name, object_get_typename(obj));
1220 return NULL;
1221 }
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(obj->properties, prop->name, prop);
1234 return prop;
1235 }
1236
1237 ObjectProperty *
1238 object_property_add(Object *obj, const char *name, const char *type,
1239 ObjectPropertyAccessor *get,
1240 ObjectPropertyAccessor *set,
1241 ObjectPropertyRelease *release,
1242 void *opaque)
1243 {
1244 return object_property_try_add(obj, name, type, get, set, release,
1245 opaque, &error_abort);
1246 }
1247
1248 ObjectProperty *
1249 object_class_property_add(ObjectClass *klass,
1250 const char *name,
1251 const char *type,
1252 ObjectPropertyAccessor *get,
1253 ObjectPropertyAccessor *set,
1254 ObjectPropertyRelease *release,
1255 void *opaque)
1256 {
1257 ObjectProperty *prop;
1258
1259 assert(!object_class_property_find(klass, name, NULL));
1260
1261 prop = g_malloc0(sizeof(*prop));
1262
1263 prop->name = g_strdup(name);
1264 prop->type = g_strdup(type);
1265
1266 prop->get = get;
1267 prop->set = set;
1268 prop->release = release;
1269 prop->opaque = opaque;
1270
1271 g_hash_table_insert(klass->properties, prop->name, prop);
1272
1273 return prop;
1274 }
1275
1276 ObjectProperty *object_property_find(Object *obj, const char *name,
1277 Error **errp)
1278 {
1279 ObjectProperty *prop;
1280 ObjectClass *klass = object_get_class(obj);
1281
1282 prop = object_class_property_find(klass, name, NULL);
1283 if (prop) {
1284 return prop;
1285 }
1286
1287 prop = g_hash_table_lookup(obj->properties, name);
1288 if (prop) {
1289 return prop;
1290 }
1291
1292 error_setg(errp, "Property '.%s' not found", name);
1293 return NULL;
1294 }
1295
1296 void object_property_iter_init(ObjectPropertyIterator *iter,
1297 Object *obj)
1298 {
1299 g_hash_table_iter_init(&iter->iter, obj->properties);
1300 iter->nextclass = object_get_class(obj);
1301 }
1302
1303 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1304 {
1305 gpointer key, val;
1306 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1307 if (!iter->nextclass) {
1308 return NULL;
1309 }
1310 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1311 iter->nextclass = object_class_get_parent(iter->nextclass);
1312 }
1313 return val;
1314 }
1315
1316 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1317 ObjectClass *klass)
1318 {
1319 g_hash_table_iter_init(&iter->iter, klass->properties);
1320 iter->nextclass = object_class_get_parent(klass);
1321 }
1322
1323 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name,
1324 Error **errp)
1325 {
1326 ObjectProperty *prop;
1327 ObjectClass *parent_klass;
1328
1329 parent_klass = object_class_get_parent(klass);
1330 if (parent_klass) {
1331 prop = object_class_property_find(parent_klass, name, NULL);
1332 if (prop) {
1333 return prop;
1334 }
1335 }
1336
1337 prop = g_hash_table_lookup(klass->properties, name);
1338 if (!prop) {
1339 error_setg(errp, "Property '.%s' not found", name);
1340 }
1341 return prop;
1342 }
1343
1344 void object_property_del(Object *obj, const char *name)
1345 {
1346 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1347
1348 if (prop->release) {
1349 prop->release(obj, name, prop->opaque);
1350 }
1351 g_hash_table_remove(obj->properties, name);
1352 }
1353
1354 bool object_property_get(Object *obj, const char *name, Visitor *v,
1355 Error **errp)
1356 {
1357 Error *err = NULL;
1358 ObjectProperty *prop = object_property_find(obj, name, errp);
1359
1360 if (prop == NULL) {
1361 return false;
1362 }
1363
1364 if (!prop->get) {
1365 error_setg(errp, QERR_PERMISSION_DENIED);
1366 return false;
1367 }
1368 prop->get(obj, v, name, prop->opaque, &err);
1369 error_propagate(errp, err);
1370 return !err;
1371 }
1372
1373 bool object_property_set(Object *obj, const char *name, Visitor *v,
1374 Error **errp)
1375 {
1376 Error *err = NULL;
1377 ObjectProperty *prop = object_property_find(obj, name, errp);
1378
1379 if (prop == NULL) {
1380 return false;
1381 }
1382
1383 if (!prop->set) {
1384 error_setg(errp, QERR_PERMISSION_DENIED);
1385 return false;
1386 }
1387 prop->set(obj, v, name, prop->opaque, &err);
1388 error_propagate(errp, err);
1389 return !err;
1390 }
1391
1392 bool object_property_set_str(Object *obj, const char *name,
1393 const char *value, Error **errp)
1394 {
1395 QString *qstr = qstring_from_str(value);
1396 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp);
1397
1398 qobject_unref(qstr);
1399 return ok;
1400 }
1401
1402 char *object_property_get_str(Object *obj, const char *name,
1403 Error **errp)
1404 {
1405 QObject *ret = object_property_get_qobject(obj, name, errp);
1406 char *retval;
1407
1408 if (!ret) {
1409 return NULL;
1410 }
1411
1412 retval = g_strdup(qobject_get_try_str(ret));
1413 if (!retval) {
1414 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1415 }
1416
1417 qobject_unref(ret);
1418 return retval;
1419 }
1420
1421 bool object_property_set_link(Object *obj, const char *name,
1422 Object *value, Error **errp)
1423 {
1424 g_autofree char *path = NULL;
1425
1426 if (value) {
1427 path = object_get_canonical_path(value);
1428 }
1429 return object_property_set_str(obj, name, path ?: "", errp);
1430 }
1431
1432 Object *object_property_get_link(Object *obj, const char *name,
1433 Error **errp)
1434 {
1435 char *str = object_property_get_str(obj, name, errp);
1436 Object *target = NULL;
1437
1438 if (str && *str) {
1439 target = object_resolve_path(str, NULL);
1440 if (!target) {
1441 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1442 "Device '%s' not found", str);
1443 }
1444 }
1445
1446 g_free(str);
1447 return target;
1448 }
1449
1450 bool object_property_set_bool(Object *obj, const char *name,
1451 bool value, Error **errp)
1452 {
1453 QBool *qbool = qbool_from_bool(value);
1454 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp);
1455
1456 qobject_unref(qbool);
1457 return ok;
1458 }
1459
1460 bool object_property_get_bool(Object *obj, const char *name,
1461 Error **errp)
1462 {
1463 QObject *ret = object_property_get_qobject(obj, name, errp);
1464 QBool *qbool;
1465 bool retval;
1466
1467 if (!ret) {
1468 return false;
1469 }
1470 qbool = qobject_to(QBool, ret);
1471 if (!qbool) {
1472 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1473 retval = false;
1474 } else {
1475 retval = qbool_get_bool(qbool);
1476 }
1477
1478 qobject_unref(ret);
1479 return retval;
1480 }
1481
1482 bool object_property_set_int(Object *obj, const char *name,
1483 int64_t value, Error **errp)
1484 {
1485 QNum *qnum = qnum_from_int(value);
1486 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1487
1488 qobject_unref(qnum);
1489 return ok;
1490 }
1491
1492 int64_t object_property_get_int(Object *obj, const char *name,
1493 Error **errp)
1494 {
1495 QObject *ret = object_property_get_qobject(obj, name, errp);
1496 QNum *qnum;
1497 int64_t retval;
1498
1499 if (!ret) {
1500 return -1;
1501 }
1502
1503 qnum = qobject_to(QNum, ret);
1504 if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1505 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1506 retval = -1;
1507 }
1508
1509 qobject_unref(ret);
1510 return retval;
1511 }
1512
1513 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1514 {
1515 Visitor *v = qobject_input_visitor_new(prop->defval);
1516
1517 assert(prop->set != NULL);
1518 prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1519
1520 visit_free(v);
1521 }
1522
1523 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1524 {
1525 assert(!prop->defval);
1526 assert(!prop->init);
1527
1528 prop->defval = defval;
1529 prop->init = object_property_init_defval;
1530 }
1531
1532 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1533 {
1534 object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1535 }
1536
1537 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1538 {
1539 object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1540 }
1541
1542 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1543 {
1544 object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1545 }
1546
1547 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1548 {
1549 object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1550 }
1551
1552 bool object_property_set_uint(Object *obj, const char *name,
1553 uint64_t value, Error **errp)
1554 {
1555 QNum *qnum = qnum_from_uint(value);
1556 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1557
1558 qobject_unref(qnum);
1559 return ok;
1560 }
1561
1562 uint64_t object_property_get_uint(Object *obj, const char *name,
1563 Error **errp)
1564 {
1565 QObject *ret = object_property_get_qobject(obj, name, errp);
1566 QNum *qnum;
1567 uint64_t retval;
1568
1569 if (!ret) {
1570 return 0;
1571 }
1572 qnum = qobject_to(QNum, ret);
1573 if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1574 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1575 retval = 0;
1576 }
1577
1578 qobject_unref(ret);
1579 return retval;
1580 }
1581
1582 typedef struct EnumProperty {
1583 const QEnumLookup *lookup;
1584 int (*get)(Object *, Error **);
1585 void (*set)(Object *, int, Error **);
1586 } EnumProperty;
1587
1588 int object_property_get_enum(Object *obj, const char *name,
1589 const char *typename, Error **errp)
1590 {
1591 char *str;
1592 int ret;
1593 ObjectProperty *prop = object_property_find(obj, name, errp);
1594 EnumProperty *enumprop;
1595
1596 if (prop == NULL) {
1597 return -1;
1598 }
1599
1600 if (!g_str_equal(prop->type, typename)) {
1601 error_setg(errp, "Property %s on %s is not '%s' enum type",
1602 name, object_class_get_name(
1603 object_get_class(obj)), typename);
1604 return -1;
1605 }
1606
1607 enumprop = prop->opaque;
1608
1609 str = object_property_get_str(obj, name, errp);
1610 if (!str) {
1611 return -1;
1612 }
1613
1614 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1615 g_free(str);
1616
1617 return ret;
1618 }
1619
1620 bool object_property_parse(Object *obj, const char *name,
1621 const char *string, Error **errp)
1622 {
1623 Visitor *v = string_input_visitor_new(string);
1624 bool ok = object_property_set(obj, name, v, errp);
1625
1626 visit_free(v);
1627 return ok;
1628 }
1629
1630 char *object_property_print(Object *obj, const char *name, bool human,
1631 Error **errp)
1632 {
1633 Visitor *v;
1634 char *string = NULL;
1635
1636 v = string_output_visitor_new(human, &string);
1637 if (!object_property_get(obj, name, v, errp)) {
1638 goto out;
1639 }
1640
1641 visit_complete(v, &string);
1642
1643 out:
1644 visit_free(v);
1645 return string;
1646 }
1647
1648 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1649 {
1650 ObjectProperty *prop = object_property_find(obj, name, errp);
1651 if (prop == NULL) {
1652 return NULL;
1653 }
1654
1655 return prop->type;
1656 }
1657
1658 Object *object_get_root(void)
1659 {
1660 static Object *root;
1661
1662 if (!root) {
1663 root = object_new("container");
1664 }
1665
1666 return root;
1667 }
1668
1669 Object *object_get_objects_root(void)
1670 {
1671 return container_get(object_get_root(), "/objects");
1672 }
1673
1674 Object *object_get_internal_root(void)
1675 {
1676 static Object *internal_root;
1677
1678 if (!internal_root) {
1679 internal_root = object_new("container");
1680 }
1681
1682 return internal_root;
1683 }
1684
1685 static void object_get_child_property(Object *obj, Visitor *v,
1686 const char *name, void *opaque,
1687 Error **errp)
1688 {
1689 Object *child = opaque;
1690 char *path;
1691
1692 path = object_get_canonical_path(child);
1693 visit_type_str(v, name, &path, errp);
1694 g_free(path);
1695 }
1696
1697 static Object *object_resolve_child_property(Object *parent, void *opaque,
1698 const char *part)
1699 {
1700 return opaque;
1701 }
1702
1703 static void object_finalize_child_property(Object *obj, const char *name,
1704 void *opaque)
1705 {
1706 Object *child = opaque;
1707
1708 if (child->class->unparent) {
1709 (child->class->unparent)(child);
1710 }
1711 child->parent = NULL;
1712 object_unref(child);
1713 }
1714
1715 ObjectProperty *
1716 object_property_try_add_child(Object *obj, const char *name,
1717 Object *child, Error **errp)
1718 {
1719 g_autofree char *type = NULL;
1720 ObjectProperty *op;
1721
1722 assert(!child->parent);
1723
1724 type = g_strdup_printf("child<%s>", object_get_typename(child));
1725
1726 op = object_property_try_add(obj, name, type, object_get_child_property,
1727 NULL, object_finalize_child_property,
1728 child, errp);
1729 if (!op) {
1730 return NULL;
1731 }
1732 op->resolve = object_resolve_child_property;
1733 object_ref(child);
1734 child->parent = obj;
1735 return op;
1736 }
1737
1738 ObjectProperty *
1739 object_property_add_child(Object *obj, const char *name,
1740 Object *child)
1741 {
1742 return object_property_try_add_child(obj, name, child, &error_abort);
1743 }
1744
1745 void object_property_allow_set_link(const Object *obj, const char *name,
1746 Object *val, Error **errp)
1747 {
1748 /* Allow the link to be set, always */
1749 }
1750
1751 typedef struct {
1752 union {
1753 Object **targetp;
1754 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */
1755 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1756 };
1757 void (*check)(const Object *, const char *, Object *, Error **);
1758 ObjectPropertyLinkFlags flags;
1759 } LinkProperty;
1760
1761 static Object **
1762 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1763 {
1764 if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1765 return &lprop->target;
1766 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1767 return (void *)obj + lprop->offset;
1768 } else {
1769 return lprop->targetp;
1770 }
1771 }
1772
1773 static void object_get_link_property(Object *obj, Visitor *v,
1774 const char *name, void *opaque,
1775 Error **errp)
1776 {
1777 LinkProperty *lprop = opaque;
1778 Object **targetp = object_link_get_targetp(obj, lprop);
1779 char *path;
1780
1781 if (*targetp) {
1782 path = object_get_canonical_path(*targetp);
1783 visit_type_str(v, name, &path, errp);
1784 g_free(path);
1785 } else {
1786 path = (char *)"";
1787 visit_type_str(v, name, &path, errp);
1788 }
1789 }
1790
1791 /*
1792 * object_resolve_link:
1793 *
1794 * Lookup an object and ensure its type matches the link property type. This
1795 * is similar to object_resolve_path() except type verification against the
1796 * link property is performed.
1797 *
1798 * Returns: The matched object or NULL on path lookup failures.
1799 */
1800 static Object *object_resolve_link(Object *obj, const char *name,
1801 const char *path, Error **errp)
1802 {
1803 const char *type;
1804 char *target_type;
1805 bool ambiguous = false;
1806 Object *target;
1807
1808 /* Go from link<FOO> to FOO. */
1809 type = object_property_get_type(obj, name, NULL);
1810 target_type = g_strndup(&type[5], strlen(type) - 6);
1811 target = object_resolve_path_type(path, target_type, &ambiguous);
1812
1813 if (ambiguous) {
1814 error_setg(errp, "Path '%s' does not uniquely identify an object",
1815 path);
1816 } else if (!target) {
1817 target = object_resolve_path(path, &ambiguous);
1818 if (target || ambiguous) {
1819 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1820 } else {
1821 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1822 "Device '%s' not found", path);
1823 }
1824 target = NULL;
1825 }
1826 g_free(target_type);
1827
1828 return target;
1829 }
1830
1831 static void object_set_link_property(Object *obj, Visitor *v,
1832 const char *name, void *opaque,
1833 Error **errp)
1834 {
1835 Error *local_err = NULL;
1836 LinkProperty *prop = opaque;
1837 Object **targetp = object_link_get_targetp(obj, prop);
1838 Object *old_target = *targetp;
1839 Object *new_target;
1840 char *path = NULL;
1841
1842 if (!visit_type_str(v, name, &path, errp)) {
1843 return;
1844 }
1845
1846 if (*path) {
1847 new_target = object_resolve_link(obj, name, path, errp);
1848 if (!new_target) {
1849 g_free(path);
1850 return;
1851 }
1852 } else {
1853 new_target = NULL;
1854 }
1855
1856 g_free(path);
1857
1858 prop->check(obj, name, new_target, &local_err);
1859 if (local_err) {
1860 error_propagate(errp, local_err);
1861 return;
1862 }
1863
1864 *targetp = new_target;
1865 if (prop->flags & OBJ_PROP_LINK_STRONG) {
1866 object_ref(new_target);
1867 object_unref(old_target);
1868 }
1869 }
1870
1871 static Object *object_resolve_link_property(Object *parent, void *opaque,
1872 const char *part)
1873 {
1874 LinkProperty *lprop = opaque;
1875
1876 return *object_link_get_targetp(parent, lprop);
1877 }
1878
1879 static void object_release_link_property(Object *obj, const char *name,
1880 void *opaque)
1881 {
1882 LinkProperty *prop = opaque;
1883 Object **targetp = object_link_get_targetp(obj, prop);
1884
1885 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1886 object_unref(*targetp);
1887 }
1888 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1889 g_free(prop);
1890 }
1891 }
1892
1893 static ObjectProperty *
1894 object_add_link_prop(Object *obj, const char *name,
1895 const char *type, void *ptr,
1896 void (*check)(const Object *, const char *,
1897 Object *, Error **),
1898 ObjectPropertyLinkFlags flags)
1899 {
1900 LinkProperty *prop = g_malloc(sizeof(*prop));
1901 g_autofree char *full_type = NULL;
1902 ObjectProperty *op;
1903
1904 if (flags & OBJ_PROP_LINK_DIRECT) {
1905 prop->target = ptr;
1906 } else {
1907 prop->targetp = ptr;
1908 }
1909 prop->check = check;
1910 prop->flags = flags;
1911
1912 full_type = g_strdup_printf("link<%s>", type);
1913
1914 op = object_property_add(obj, name, full_type,
1915 object_get_link_property,
1916 check ? object_set_link_property : NULL,
1917 object_release_link_property,
1918 prop);
1919 op->resolve = object_resolve_link_property;
1920 return op;
1921 }
1922
1923 ObjectProperty *
1924 object_property_add_link(Object *obj, const char *name,
1925 const char *type, Object **targetp,
1926 void (*check)(const Object *, const char *,
1927 Object *, Error **),
1928 ObjectPropertyLinkFlags flags)
1929 {
1930 return object_add_link_prop(obj, name, type, targetp, check, flags);
1931 }
1932
1933 ObjectProperty *
1934 object_class_property_add_link(ObjectClass *oc,
1935 const char *name,
1936 const char *type, ptrdiff_t offset,
1937 void (*check)(const Object *obj, const char *name,
1938 Object *val, Error **errp),
1939 ObjectPropertyLinkFlags flags)
1940 {
1941 LinkProperty *prop = g_new0(LinkProperty, 1);
1942 char *full_type;
1943 ObjectProperty *op;
1944
1945 prop->offset = offset;
1946 prop->check = check;
1947 prop->flags = flags | OBJ_PROP_LINK_CLASS;
1948
1949 full_type = g_strdup_printf("link<%s>", type);
1950
1951 op = object_class_property_add(oc, name, full_type,
1952 object_get_link_property,
1953 check ? object_set_link_property : NULL,
1954 object_release_link_property,
1955 prop);
1956
1957 op->resolve = object_resolve_link_property;
1958
1959 g_free(full_type);
1960 return op;
1961 }
1962
1963 ObjectProperty *
1964 object_property_add_const_link(Object *obj, const char *name,
1965 Object *target)
1966 {
1967 return object_add_link_prop(obj, name,
1968 object_get_typename(target), target,
1969 NULL, OBJ_PROP_LINK_DIRECT);
1970 }
1971
1972 const char *object_get_canonical_path_component(const Object *obj)
1973 {
1974 ObjectProperty *prop = NULL;
1975 GHashTableIter iter;
1976
1977 if (obj->parent == NULL) {
1978 return NULL;
1979 }
1980
1981 g_hash_table_iter_init(&iter, obj->parent->properties);
1982 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1983 if (!object_property_is_child(prop)) {
1984 continue;
1985 }
1986
1987 if (prop->opaque == obj) {
1988 return prop->name;
1989 }
1990 }
1991
1992 /* obj had a parent but was not a child, should never happen */
1993 g_assert_not_reached();
1994 return NULL;
1995 }
1996
1997 char *object_get_canonical_path(const Object *obj)
1998 {
1999 Object *root = object_get_root();
2000 char *newpath, *path = NULL;
2001
2002 if (obj == root) {
2003 return g_strdup("/");
2004 }
2005
2006 do {
2007 const char *component = object_get_canonical_path_component(obj);
2008
2009 if (!component) {
2010 /* A canonical path must be complete, so discard what was
2011 * collected so far.
2012 */
2013 g_free(path);
2014 return NULL;
2015 }
2016
2017 newpath = g_strdup_printf("/%s%s", component, path ? path : "");
2018 g_free(path);
2019 path = newpath;
2020 obj = obj->parent;
2021 } while (obj != root);
2022
2023 return path;
2024 }
2025
2026 Object *object_resolve_path_component(Object *parent, const char *part)
2027 {
2028 ObjectProperty *prop = object_property_find(parent, part, NULL);
2029 if (prop == NULL) {
2030 return NULL;
2031 }
2032
2033 if (prop->resolve) {
2034 return prop->resolve(parent, prop->opaque, part);
2035 } else {
2036 return NULL;
2037 }
2038 }
2039
2040 static Object *object_resolve_abs_path(Object *parent,
2041 char **parts,
2042 const char *typename)
2043 {
2044 Object *child;
2045
2046 if (*parts == NULL) {
2047 return object_dynamic_cast(parent, typename);
2048 }
2049
2050 if (strcmp(*parts, "") == 0) {
2051 return object_resolve_abs_path(parent, parts + 1, typename);
2052 }
2053
2054 child = object_resolve_path_component(parent, *parts);
2055 if (!child) {
2056 return NULL;
2057 }
2058
2059 return object_resolve_abs_path(child, parts + 1, typename);
2060 }
2061
2062 static Object *object_resolve_partial_path(Object *parent,
2063 char **parts,
2064 const char *typename,
2065 bool *ambiguous)
2066 {
2067 Object *obj;
2068 GHashTableIter iter;
2069 ObjectProperty *prop;
2070
2071 obj = object_resolve_abs_path(parent, parts, typename);
2072
2073 g_hash_table_iter_init(&iter, parent->properties);
2074 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2075 Object *found;
2076
2077 if (!object_property_is_child(prop)) {
2078 continue;
2079 }
2080
2081 found = object_resolve_partial_path(prop->opaque, parts,
2082 typename, ambiguous);
2083 if (found) {
2084 if (obj) {
2085 *ambiguous = true;
2086 return NULL;
2087 }
2088 obj = found;
2089 }
2090
2091 if (*ambiguous) {
2092 return NULL;
2093 }
2094 }
2095
2096 return obj;
2097 }
2098
2099 Object *object_resolve_path_type(const char *path, const char *typename,
2100 bool *ambiguousp)
2101 {
2102 Object *obj;
2103 char **parts;
2104
2105 parts = g_strsplit(path, "/", 0);
2106 assert(parts);
2107
2108 if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2109 bool ambiguous = false;
2110 obj = object_resolve_partial_path(object_get_root(), parts,
2111 typename, &ambiguous);
2112 if (ambiguousp) {
2113 *ambiguousp = ambiguous;
2114 }
2115 } else {
2116 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2117 }
2118
2119 g_strfreev(parts);
2120
2121 return obj;
2122 }
2123
2124 Object *object_resolve_path(const char *path, bool *ambiguous)
2125 {
2126 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2127 }
2128
2129 typedef struct StringProperty
2130 {
2131 char *(*get)(Object *, Error **);
2132 void (*set)(Object *, const char *, Error **);
2133 } StringProperty;
2134
2135 static void property_get_str(Object *obj, Visitor *v, const char *name,
2136 void *opaque, Error **errp)
2137 {
2138 StringProperty *prop = opaque;
2139 char *value;
2140 Error *err = NULL;
2141
2142 value = prop->get(obj, &err);
2143 if (err) {
2144 error_propagate(errp, err);
2145 return;
2146 }
2147
2148 visit_type_str(v, name, &value, errp);
2149 g_free(value);
2150 }
2151
2152 static void property_set_str(Object *obj, Visitor *v, const char *name,
2153 void *opaque, Error **errp)
2154 {
2155 StringProperty *prop = opaque;
2156 char *value;
2157
2158 if (!visit_type_str(v, name, &value, errp)) {
2159 return;
2160 }
2161
2162 prop->set(obj, value, errp);
2163 g_free(value);
2164 }
2165
2166 static void property_release_str(Object *obj, const char *name,
2167 void *opaque)
2168 {
2169 StringProperty *prop = opaque;
2170 g_free(prop);
2171 }
2172
2173 ObjectProperty *
2174 object_property_add_str(Object *obj, const char *name,
2175 char *(*get)(Object *, Error **),
2176 void (*set)(Object *, const char *, Error **))
2177 {
2178 StringProperty *prop = g_malloc0(sizeof(*prop));
2179
2180 prop->get = get;
2181 prop->set = set;
2182
2183 return object_property_add(obj, name, "string",
2184 get ? property_get_str : NULL,
2185 set ? property_set_str : NULL,
2186 property_release_str,
2187 prop);
2188 }
2189
2190 ObjectProperty *
2191 object_class_property_add_str(ObjectClass *klass, const char *name,
2192 char *(*get)(Object *, Error **),
2193 void (*set)(Object *, const char *,
2194 Error **))
2195 {
2196 StringProperty *prop = g_malloc0(sizeof(*prop));
2197
2198 prop->get = get;
2199 prop->set = set;
2200
2201 return object_class_property_add(klass, name, "string",
2202 get ? property_get_str : NULL,
2203 set ? property_set_str : NULL,
2204 NULL,
2205 prop);
2206 }
2207
2208 typedef struct BoolProperty
2209 {
2210 bool (*get)(Object *, Error **);
2211 void (*set)(Object *, bool, Error **);
2212 } BoolProperty;
2213
2214 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2215 void *opaque, Error **errp)
2216 {
2217 BoolProperty *prop = opaque;
2218 bool value;
2219 Error *err = NULL;
2220
2221 value = prop->get(obj, &err);
2222 if (err) {
2223 error_propagate(errp, err);
2224 return;
2225 }
2226
2227 visit_type_bool(v, name, &value, errp);
2228 }
2229
2230 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2231 void *opaque, Error **errp)
2232 {
2233 BoolProperty *prop = opaque;
2234 bool value;
2235
2236 if (!visit_type_bool(v, name, &value, errp)) {
2237 return;
2238 }
2239
2240 prop->set(obj, value, errp);
2241 }
2242
2243 static void property_release_bool(Object *obj, const char *name,
2244 void *opaque)
2245 {
2246 BoolProperty *prop = opaque;
2247 g_free(prop);
2248 }
2249
2250 ObjectProperty *
2251 object_property_add_bool(Object *obj, const char *name,
2252 bool (*get)(Object *, Error **),
2253 void (*set)(Object *, bool, Error **))
2254 {
2255 BoolProperty *prop = g_malloc0(sizeof(*prop));
2256
2257 prop->get = get;
2258 prop->set = set;
2259
2260 return object_property_add(obj, name, "bool",
2261 get ? property_get_bool : NULL,
2262 set ? property_set_bool : NULL,
2263 property_release_bool,
2264 prop);
2265 }
2266
2267 ObjectProperty *
2268 object_class_property_add_bool(ObjectClass *klass, const char *name,
2269 bool (*get)(Object *, Error **),
2270 void (*set)(Object *, bool, Error **))
2271 {
2272 BoolProperty *prop = g_malloc0(sizeof(*prop));
2273
2274 prop->get = get;
2275 prop->set = set;
2276
2277 return object_class_property_add(klass, name, "bool",
2278 get ? property_get_bool : NULL,
2279 set ? property_set_bool : NULL,
2280 NULL,
2281 prop);
2282 }
2283
2284 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2285 void *opaque, Error **errp)
2286 {
2287 EnumProperty *prop = opaque;
2288 int value;
2289 Error *err = NULL;
2290
2291 value = prop->get(obj, &err);
2292 if (err) {
2293 error_propagate(errp, err);
2294 return;
2295 }
2296
2297 visit_type_enum(v, name, &value, prop->lookup, errp);
2298 }
2299
2300 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2301 void *opaque, Error **errp)
2302 {
2303 EnumProperty *prop = opaque;
2304 int value;
2305
2306 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) {
2307 return;
2308 }
2309 prop->set(obj, value, errp);
2310 }
2311
2312 static void property_release_enum(Object *obj, const char *name,
2313 void *opaque)
2314 {
2315 EnumProperty *prop = opaque;
2316 g_free(prop);
2317 }
2318
2319 ObjectProperty *
2320 object_property_add_enum(Object *obj, const char *name,
2321 const char *typename,
2322 const QEnumLookup *lookup,
2323 int (*get)(Object *, Error **),
2324 void (*set)(Object *, int, Error **))
2325 {
2326 EnumProperty *prop = g_malloc(sizeof(*prop));
2327
2328 prop->lookup = lookup;
2329 prop->get = get;
2330 prop->set = set;
2331
2332 return object_property_add(obj, name, typename,
2333 get ? property_get_enum : NULL,
2334 set ? property_set_enum : NULL,
2335 property_release_enum,
2336 prop);
2337 }
2338
2339 ObjectProperty *
2340 object_class_property_add_enum(ObjectClass *klass, const char *name,
2341 const char *typename,
2342 const QEnumLookup *lookup,
2343 int (*get)(Object *, Error **),
2344 void (*set)(Object *, int, Error **))
2345 {
2346 EnumProperty *prop = g_malloc(sizeof(*prop));
2347
2348 prop->lookup = lookup;
2349 prop->get = get;
2350 prop->set = set;
2351
2352 return object_class_property_add(klass, name, typename,
2353 get ? property_get_enum : NULL,
2354 set ? property_set_enum : NULL,
2355 NULL,
2356 prop);
2357 }
2358
2359 typedef struct TMProperty {
2360 void (*get)(Object *, struct tm *, Error **);
2361 } TMProperty;
2362
2363 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2364 void *opaque, Error **errp)
2365 {
2366 TMProperty *prop = opaque;
2367 Error *err = NULL;
2368 struct tm value;
2369
2370 prop->get(obj, &value, &err);
2371 if (err) {
2372 error_propagate(errp, err);
2373 return;
2374 }
2375
2376 if (!visit_start_struct(v, name, NULL, 0, errp)) {
2377 return;
2378 }
2379 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
2380 goto out_end;
2381 }
2382 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
2383 goto out_end;
2384 }
2385 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
2386 goto out_end;
2387 }
2388 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
2389 goto out_end;
2390 }
2391 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
2392 goto out_end;
2393 }
2394 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
2395 goto out_end;
2396 }
2397 visit_check_struct(v, errp);
2398 out_end:
2399 visit_end_struct(v, NULL);
2400 }
2401
2402 static void property_release_tm(Object *obj, const char *name,
2403 void *opaque)
2404 {
2405 TMProperty *prop = opaque;
2406 g_free(prop);
2407 }
2408
2409 ObjectProperty *
2410 object_property_add_tm(Object *obj, const char *name,
2411 void (*get)(Object *, struct tm *, Error **))
2412 {
2413 TMProperty *prop = g_malloc0(sizeof(*prop));
2414
2415 prop->get = get;
2416
2417 return object_property_add(obj, name, "struct tm",
2418 get ? property_get_tm : NULL, NULL,
2419 property_release_tm,
2420 prop);
2421 }
2422
2423 ObjectProperty *
2424 object_class_property_add_tm(ObjectClass *klass, const char *name,
2425 void (*get)(Object *, struct tm *, Error **))
2426 {
2427 TMProperty *prop = g_malloc0(sizeof(*prop));
2428
2429 prop->get = get;
2430
2431 return object_class_property_add(klass, name, "struct tm",
2432 get ? property_get_tm : NULL,
2433 NULL, NULL, prop);
2434 }
2435
2436 static char *object_get_type(Object *obj, Error **errp)
2437 {
2438 return g_strdup(object_get_typename(obj));
2439 }
2440
2441 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2442 void *opaque, Error **errp)
2443 {
2444 uint8_t value = *(uint8_t *)opaque;
2445 visit_type_uint8(v, name, &value, errp);
2446 }
2447
2448 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2449 void *opaque, Error **errp)
2450 {
2451 uint8_t *field = opaque;
2452 uint8_t value;
2453
2454 if (!visit_type_uint8(v, name, &value, errp)) {
2455 return;
2456 }
2457
2458 *field = value;
2459 }
2460
2461 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2462 void *opaque, Error **errp)
2463 {
2464 uint16_t value = *(uint16_t *)opaque;
2465 visit_type_uint16(v, name, &value, errp);
2466 }
2467
2468 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2469 void *opaque, Error **errp)
2470 {
2471 uint16_t *field = opaque;
2472 uint16_t value;
2473
2474 if (!visit_type_uint16(v, name, &value, errp)) {
2475 return;
2476 }
2477
2478 *field = value;
2479 }
2480
2481 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2482 void *opaque, Error **errp)
2483 {
2484 uint32_t value = *(uint32_t *)opaque;
2485 visit_type_uint32(v, name, &value, errp);
2486 }
2487
2488 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2489 void *opaque, Error **errp)
2490 {
2491 uint32_t *field = opaque;
2492 uint32_t value;
2493
2494 if (!visit_type_uint32(v, name, &value, errp)) {
2495 return;
2496 }
2497
2498 *field = value;
2499 }
2500
2501 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2502 void *opaque, Error **errp)
2503 {
2504 uint64_t value = *(uint64_t *)opaque;
2505 visit_type_uint64(v, name, &value, errp);
2506 }
2507
2508 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2509 void *opaque, Error **errp)
2510 {
2511 uint64_t *field = opaque;
2512 uint64_t value;
2513
2514 if (!visit_type_uint64(v, name, &value, errp)) {
2515 return;
2516 }
2517
2518 *field = value;
2519 }
2520
2521 ObjectProperty *
2522 object_property_add_uint8_ptr(Object *obj, const char *name,
2523 const uint8_t *v,
2524 ObjectPropertyFlags flags)
2525 {
2526 ObjectPropertyAccessor *getter = NULL;
2527 ObjectPropertyAccessor *setter = NULL;
2528
2529 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2530 getter = property_get_uint8_ptr;
2531 }
2532
2533 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2534 setter = property_set_uint8_ptr;
2535 }
2536
2537 return object_property_add(obj, name, "uint8",
2538 getter, setter, NULL, (void *)v);
2539 }
2540
2541 ObjectProperty *
2542 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2543 const uint8_t *v,
2544 ObjectPropertyFlags flags)
2545 {
2546 ObjectPropertyAccessor *getter = NULL;
2547 ObjectPropertyAccessor *setter = NULL;
2548
2549 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2550 getter = property_get_uint8_ptr;
2551 }
2552
2553 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2554 setter = property_set_uint8_ptr;
2555 }
2556
2557 return object_class_property_add(klass, name, "uint8",
2558 getter, setter, NULL, (void *)v);
2559 }
2560
2561 ObjectProperty *
2562 object_property_add_uint16_ptr(Object *obj, const char *name,
2563 const uint16_t *v,
2564 ObjectPropertyFlags flags)
2565 {
2566 ObjectPropertyAccessor *getter = NULL;
2567 ObjectPropertyAccessor *setter = NULL;
2568
2569 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2570 getter = property_get_uint16_ptr;
2571 }
2572
2573 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2574 setter = property_set_uint16_ptr;
2575 }
2576
2577 return object_property_add(obj, name, "uint16",
2578 getter, setter, NULL, (void *)v);
2579 }
2580
2581 ObjectProperty *
2582 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2583 const uint16_t *v,
2584 ObjectPropertyFlags flags)
2585 {
2586 ObjectPropertyAccessor *getter = NULL;
2587 ObjectPropertyAccessor *setter = NULL;
2588
2589 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2590 getter = property_get_uint16_ptr;
2591 }
2592
2593 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2594 setter = property_set_uint16_ptr;
2595 }
2596
2597 return object_class_property_add(klass, name, "uint16",
2598 getter, setter, NULL, (void *)v);
2599 }
2600
2601 ObjectProperty *
2602 object_property_add_uint32_ptr(Object *obj, const char *name,
2603 const uint32_t *v,
2604 ObjectPropertyFlags flags)
2605 {
2606 ObjectPropertyAccessor *getter = NULL;
2607 ObjectPropertyAccessor *setter = NULL;
2608
2609 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2610 getter = property_get_uint32_ptr;
2611 }
2612
2613 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2614 setter = property_set_uint32_ptr;
2615 }
2616
2617 return object_property_add(obj, name, "uint32",
2618 getter, setter, NULL, (void *)v);
2619 }
2620
2621 ObjectProperty *
2622 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2623 const uint32_t *v,
2624 ObjectPropertyFlags flags)
2625 {
2626 ObjectPropertyAccessor *getter = NULL;
2627 ObjectPropertyAccessor *setter = NULL;
2628
2629 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2630 getter = property_get_uint32_ptr;
2631 }
2632
2633 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2634 setter = property_set_uint32_ptr;
2635 }
2636
2637 return object_class_property_add(klass, name, "uint32",
2638 getter, setter, NULL, (void *)v);
2639 }
2640
2641 ObjectProperty *
2642 object_property_add_uint64_ptr(Object *obj, const char *name,
2643 const uint64_t *v,
2644 ObjectPropertyFlags flags)
2645 {
2646 ObjectPropertyAccessor *getter = NULL;
2647 ObjectPropertyAccessor *setter = NULL;
2648
2649 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2650 getter = property_get_uint64_ptr;
2651 }
2652
2653 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2654 setter = property_set_uint64_ptr;
2655 }
2656
2657 return object_property_add(obj, name, "uint64",
2658 getter, setter, NULL, (void *)v);
2659 }
2660
2661 ObjectProperty *
2662 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2663 const uint64_t *v,
2664 ObjectPropertyFlags flags)
2665 {
2666 ObjectPropertyAccessor *getter = NULL;
2667 ObjectPropertyAccessor *setter = NULL;
2668
2669 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2670 getter = property_get_uint64_ptr;
2671 }
2672
2673 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2674 setter = property_set_uint64_ptr;
2675 }
2676
2677 return object_class_property_add(klass, name, "uint64",
2678 getter, setter, NULL, (void *)v);
2679 }
2680
2681 typedef struct {
2682 Object *target_obj;
2683 char *target_name;
2684 } AliasProperty;
2685
2686 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2687 void *opaque, Error **errp)
2688 {
2689 AliasProperty *prop = opaque;
2690
2691 object_property_get(prop->target_obj, prop->target_name, v, errp);
2692 }
2693
2694 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2695 void *opaque, Error **errp)
2696 {
2697 AliasProperty *prop = opaque;
2698
2699 object_property_set(prop->target_obj, prop->target_name, v, errp);
2700 }
2701
2702 static Object *property_resolve_alias(Object *obj, void *opaque,
2703 const char *part)
2704 {
2705 AliasProperty *prop = opaque;
2706
2707 return object_resolve_path_component(prop->target_obj, prop->target_name);
2708 }
2709
2710 static void property_release_alias(Object *obj, const char *name, void *opaque)
2711 {
2712 AliasProperty *prop = opaque;
2713
2714 g_free(prop->target_name);
2715 g_free(prop);
2716 }
2717
2718 ObjectProperty *
2719 object_property_add_alias(Object *obj, const char *name,
2720 Object *target_obj, const char *target_name)
2721 {
2722 AliasProperty *prop;
2723 ObjectProperty *op;
2724 ObjectProperty *target_prop;
2725 g_autofree char *prop_type = NULL;
2726
2727 target_prop = object_property_find(target_obj, target_name,
2728 &error_abort);
2729
2730 if (object_property_is_child(target_prop)) {
2731 prop_type = g_strdup_printf("link%s",
2732 target_prop->type + strlen("child"));
2733 } else {
2734 prop_type = g_strdup(target_prop->type);
2735 }
2736
2737 prop = g_malloc(sizeof(*prop));
2738 prop->target_obj = target_obj;
2739 prop->target_name = g_strdup(target_name);
2740
2741 op = object_property_add(obj, name, prop_type,
2742 property_get_alias,
2743 property_set_alias,
2744 property_release_alias,
2745 prop);
2746 op->resolve = property_resolve_alias;
2747 if (target_prop->defval) {
2748 op->defval = qobject_ref(target_prop->defval);
2749 }
2750
2751 object_property_set_description(obj, op->name,
2752 target_prop->description);
2753 return op;
2754 }
2755
2756 void object_property_set_description(Object *obj, const char *name,
2757 const char *description)
2758 {
2759 ObjectProperty *op;
2760
2761 op = object_property_find(obj, name, &error_abort);
2762 g_free(op->description);
2763 op->description = g_strdup(description);
2764 }
2765
2766 void object_class_property_set_description(ObjectClass *klass,
2767 const char *name,
2768 const char *description)
2769 {
2770 ObjectProperty *op;
2771
2772 op = g_hash_table_lookup(klass->properties, name);
2773 g_free(op->description);
2774 op->description = g_strdup(description);
2775 }
2776
2777 static void object_class_init(ObjectClass *klass, void *data)
2778 {
2779 object_class_property_add_str(klass, "type", object_get_type,
2780 NULL);
2781 }
2782
2783 static void register_types(void)
2784 {
2785 static TypeInfo interface_info = {
2786 .name = TYPE_INTERFACE,
2787 .class_size = sizeof(InterfaceClass),
2788 .abstract = true,
2789 };
2790
2791 static TypeInfo object_info = {
2792 .name = TYPE_OBJECT,
2793 .instance_size = sizeof(Object),
2794 .class_init = object_class_init,
2795 .abstract = true,
2796 };
2797
2798 type_interface = type_register_internal(&interface_info);
2799 type_register_internal(&object_info);
2800 }
2801
2802 type_init(register_types)