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target/i386/cpu: Improve error message for property "vendor"
[qemu/armbru.git] / qom / object.c
blob95c0dc8285fe70ceec211d56c6de7327045cff05
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 "qemu/memalign.h"
20 #include "qapi/visitor.h"
21 #include "qapi/string-input-visitor.h"
22 #include "qapi/string-output-visitor.h"
23 #include "qapi/qobject-input-visitor.h"
24 #include "qapi/forward-visitor.h"
25 #include "qapi/qapi-builtin-visit.h"
26 #include "qapi/qmp/qerror.h"
27 #include "qapi/qmp/qjson.h"
28 #include "trace.h"
29
30 /* TODO: replace QObject with a simpler visitor to avoid a dependency
31 * of the QOM core on QObject? */
32 #include "qom/qom-qobject.h"
33 #include "qapi/qmp/qbool.h"
34 #include "qapi/qmp/qlist.h"
35 #include "qapi/qmp/qnum.h"
36 #include "qapi/qmp/qstring.h"
37 #include "qemu/error-report.h"
38
39 #define MAX_INTERFACES 32
40
41 typedef struct InterfaceImpl InterfaceImpl;
42 typedef struct TypeImpl TypeImpl;
43
44 struct InterfaceImpl
45 {
46 const char *typename;
47 };
48
49 struct TypeImpl
50 {
51 const char *name;
52
53 size_t class_size;
54
55 size_t instance_size;
56 size_t instance_align;
57
58 void (*class_init)(ObjectClass *klass, void *data);
59 void (*class_base_init)(ObjectClass *klass, void *data);
60
61 void *class_data;
62
63 void (*instance_init)(Object *obj);
64 void (*instance_post_init)(Object *obj);
65 void (*instance_finalize)(Object *obj);
66
67 bool abstract;
68
69 const char *parent;
70 TypeImpl *parent_type;
71
72 ObjectClass *class;
73
74 int num_interfaces;
75 InterfaceImpl interfaces[MAX_INTERFACES];
76 };
77
78 static Type type_interface;
79
80 static GHashTable *type_table_get(void)
81 {
82 static GHashTable *type_table;
83
84 if (type_table == NULL) {
85 type_table = g_hash_table_new(g_str_hash, g_str_equal);
86 }
87
88 return type_table;
89 }
90
91 static bool enumerating_types;
92
93 static void type_table_add(TypeImpl *ti)
94 {
95 assert(!enumerating_types);
96 g_hash_table_insert(type_table_get(), (void *)ti->name, ti);
97 }
98
99 static TypeImpl *type_table_lookup(const char *name)
100 {
101 return g_hash_table_lookup(type_table_get(), name);
102 }
103
104 static TypeImpl *type_new(const TypeInfo *info)
105 {
106 TypeImpl *ti = g_malloc0(sizeof(*ti));
107 int i;
108
109 g_assert(info->name != NULL);
110
111 if (type_table_lookup(info->name) != NULL) {
112 fprintf(stderr, "Registering `%s' which already exists\n", info->name);
113 abort();
114 }
115
116 ti->name = g_strdup(info->name);
117 ti->parent = g_strdup(info->parent);
118
119 ti->class_size = info->class_size;
120 ti->instance_size = info->instance_size;
121 ti->instance_align = info->instance_align;
122
123 ti->class_init = info->class_init;
124 ti->class_base_init = info->class_base_init;
125 ti->class_data = info->class_data;
126
127 ti->instance_init = info->instance_init;
128 ti->instance_post_init = info->instance_post_init;
129 ti->instance_finalize = info->instance_finalize;
130
131 ti->abstract = info->abstract;
132
133 for (i = 0; info->interfaces && info->interfaces[i].type; i++) {
134 ti->interfaces[i].typename = g_strdup(info->interfaces[i].type);
135 }
136 ti->num_interfaces = i;
137
138 return ti;
139 }
140
141 static TypeImpl *type_register_internal(const TypeInfo *info)
142 {
143 TypeImpl *ti;
144 ti = type_new(info);
145
146 type_table_add(ti);
147 return ti;
148 }
149
150 TypeImpl *type_register(const TypeInfo *info)
151 {
152 assert(info->parent);
153 return type_register_internal(info);
154 }
155
156 TypeImpl *type_register_static(const TypeInfo *info)
157 {
158 return type_register(info);
159 }
160
161 void type_register_static_array(const TypeInfo *infos, int nr_infos)
162 {
163 int i;
164
165 for (i = 0; i < nr_infos; i++) {
166 type_register_static(&infos[i]);
167 }
168 }
169
170 static TypeImpl *type_get_by_name(const char *name)
171 {
172 if (name == NULL) {
173 return NULL;
174 }
175
176 return type_table_lookup(name);
177 }
178
179 static TypeImpl *type_get_parent(TypeImpl *type)
180 {
181 if (!type->parent_type && type->parent) {
182 type->parent_type = type_get_by_name(type->parent);
183 if (!type->parent_type) {
184 fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
185 type->name, type->parent);
186 abort();
187 }
188 }
189
190 return type->parent_type;
191 }
192
193 static bool type_has_parent(TypeImpl *type)
194 {
195 return (type->parent != NULL);
196 }
197
198 static size_t type_class_get_size(TypeImpl *ti)
199 {
200 if (ti->class_size) {
201 return ti->class_size;
202 }
203
204 if (type_has_parent(ti)) {
205 return type_class_get_size(type_get_parent(ti));
206 }
207
208 return sizeof(ObjectClass);
209 }
210
211 static size_t type_object_get_size(TypeImpl *ti)
212 {
213 if (ti->instance_size) {
214 return ti->instance_size;
215 }
216
217 if (type_has_parent(ti)) {
218 return type_object_get_size(type_get_parent(ti));
219 }
220
221 return 0;
222 }
223
224 static size_t type_object_get_align(TypeImpl *ti)
225 {
226 if (ti->instance_align) {
227 return ti->instance_align;
228 }
229
230 if (type_has_parent(ti)) {
231 return type_object_get_align(type_get_parent(ti));
232 }
233
234 return 0;
235 }
236
237 size_t object_type_get_instance_size(const char *typename)
238 {
239 TypeImpl *type = type_get_by_name(typename);
240
241 g_assert(type != NULL);
242 return type_object_get_size(type);
243 }
244
245 static bool type_is_ancestor(TypeImpl *type, TypeImpl *target_type)
246 {
247 assert(target_type);
248
249 /* Check if target_type is a direct ancestor of type */
250 while (type) {
251 if (type == target_type) {
252 return true;
253 }
254
255 type = type_get_parent(type);
256 }
257
258 return false;
259 }
260
261 static void type_initialize(TypeImpl *ti);
262
263 static void type_initialize_interface(TypeImpl *ti, TypeImpl *interface_type,
264 TypeImpl *parent_type)
265 {
266 InterfaceClass *new_iface;
267 TypeInfo info = { };
268 TypeImpl *iface_impl;
269
270 info.parent = parent_type->name;
271 info.name = g_strdup_printf("%s::%s", ti->name, interface_type->name);
272 info.abstract = true;
273
274 iface_impl = type_new(&info);
275 iface_impl->parent_type = parent_type;
276 type_initialize(iface_impl);
277 g_free((char *)info.name);
278
279 new_iface = (InterfaceClass *)iface_impl->class;
280 new_iface->concrete_class = ti->class;
281 new_iface->interface_type = interface_type;
282
283 ti->class->interfaces = g_slist_append(ti->class->interfaces, new_iface);
284 }
285
286 static void object_property_free(gpointer data)
287 {
288 ObjectProperty *prop = data;
289
290 if (prop->defval) {
291 qobject_unref(prop->defval);
292 prop->defval = NULL;
293 }
294 g_free(prop->name);
295 g_free(prop->type);
296 g_free(prop->description);
297 g_free(prop);
298 }
299
300 static void type_initialize(TypeImpl *ti)
301 {
302 TypeImpl *parent;
303
304 if (ti->class) {
305 return;
306 }
307
308 ti->class_size = type_class_get_size(ti);
309 ti->instance_size = type_object_get_size(ti);
310 ti->instance_align = type_object_get_align(ti);
311 /* Any type with zero instance_size is implicitly abstract.
312 * This means interface types are all abstract.
313 */
314 if (ti->instance_size == 0) {
315 ti->abstract = true;
316 }
317 if (type_is_ancestor(ti, type_interface)) {
318 assert(ti->instance_size == 0);
319 assert(ti->abstract);
320 assert(!ti->instance_init);
321 assert(!ti->instance_post_init);
322 assert(!ti->instance_finalize);
323 assert(!ti->num_interfaces);
324 }
325 ti->class = g_malloc0(ti->class_size);
326
327 parent = type_get_parent(ti);
328 if (parent) {
329 type_initialize(parent);
330 GSList *e;
331 int i;
332
333 g_assert(parent->class_size <= ti->class_size);
334 g_assert(parent->instance_size <= ti->instance_size);
335 memcpy(ti->class, parent->class, parent->class_size);
336 ti->class->interfaces = NULL;
337
338 for (e = parent->class->interfaces; e; e = e->next) {
339 InterfaceClass *iface = e->data;
340 ObjectClass *klass = OBJECT_CLASS(iface);
341
342 type_initialize_interface(ti, iface->interface_type, klass->type);
343 }
344
345 for (i = 0; i < ti->num_interfaces; i++) {
346 TypeImpl *t = type_get_by_name(ti->interfaces[i].typename);
347 if (!t) {
348 error_report("missing interface '%s' for object '%s'",
349 ti->interfaces[i].typename, parent->name);
350 abort();
351 }
352 for (e = ti->class->interfaces; e; e = e->next) {
353 TypeImpl *target_type = OBJECT_CLASS(e->data)->type;
354
355 if (type_is_ancestor(target_type, t)) {
356 break;
357 }
358 }
359
360 if (e) {
361 continue;
362 }
363
364 type_initialize_interface(ti, t, t);
365 }
366 }
367
368 ti->class->properties = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
369 object_property_free);
370
371 ti->class->type = ti;
372
373 while (parent) {
374 if (parent->class_base_init) {
375 parent->class_base_init(ti->class, ti->class_data);
376 }
377 parent = type_get_parent(parent);
378 }
379
380 if (ti->class_init) {
381 ti->class_init(ti->class, ti->class_data);
382 }
383 }
384
385 static void object_init_with_type(Object *obj, TypeImpl *ti)
386 {
387 if (type_has_parent(ti)) {
388 object_init_with_type(obj, type_get_parent(ti));
389 }
390
391 if (ti->instance_init) {
392 ti->instance_init(obj);
393 }
394 }
395
396 static void object_post_init_with_type(Object *obj, TypeImpl *ti)
397 {
398 if (ti->instance_post_init) {
399 ti->instance_post_init(obj);
400 }
401
402 if (type_has_parent(ti)) {
403 object_post_init_with_type(obj, type_get_parent(ti));
404 }
405 }
406
407 bool object_apply_global_props(Object *obj, const GPtrArray *props,
408 Error **errp)
409 {
410 int i;
411
412 if (!props) {
413 return true;
414 }
415
416 for (i = 0; i < props->len; i++) {
417 GlobalProperty *p = g_ptr_array_index(props, i);
418 Error *err = NULL;
419
420 if (object_dynamic_cast(obj, p->driver) == NULL) {
421 continue;
422 }
423 if (p->optional && !object_property_find(obj, p->property)) {
424 continue;
425 }
426 p->used = true;
427 if (!object_property_parse(obj, p->property, p->value, &err)) {
428 error_prepend(&err, "can't apply global %s.%s=%s: ",
429 p->driver, p->property, p->value);
430 /*
431 * If errp != NULL, propagate error and return.
432 * If errp == NULL, report a warning, but keep going
433 * with the remaining globals.
434 */
435 if (errp) {
436 error_propagate(errp, err);
437 return false;
438 } else {
439 warn_report_err(err);
440 }
441 }
442 }
443
444 return true;
445 }
446
447 /*
448 * Global property defaults
449 * Slot 0: accelerator's global property defaults
450 * Slot 1: machine's global property defaults
451 * Slot 2: global properties from legacy command line option
452 * Each is a GPtrArray of of GlobalProperty.
453 * Applied in order, later entries override earlier ones.
454 */
455 static GPtrArray *object_compat_props[3];
456
457 /*
458 * Retrieve @GPtrArray for global property defined with options
459 * other than "-global". These are generally used for syntactic
460 * sugar and legacy command line options.
461 */
462 void object_register_sugar_prop(const char *driver, const char *prop,
463 const char *value, bool optional)
464 {
465 GlobalProperty *g;
466 if (!object_compat_props[2]) {
467 object_compat_props[2] = g_ptr_array_new();
468 }
469 g = g_new0(GlobalProperty, 1);
470 g->driver = g_strdup(driver);
471 g->property = g_strdup(prop);
472 g->value = g_strdup(value);
473 g->optional = optional;
474 g_ptr_array_add(object_compat_props[2], g);
475 }
476
477 /*
478 * Set machine's global property defaults to @compat_props.
479 * May be called at most once.
480 */
481 void object_set_machine_compat_props(GPtrArray *compat_props)
482 {
483 assert(!object_compat_props[1]);
484 object_compat_props[1] = compat_props;
485 }
486
487 /*
488 * Set accelerator's global property defaults to @compat_props.
489 * May be called at most once.
490 */
491 void object_set_accelerator_compat_props(GPtrArray *compat_props)
492 {
493 assert(!object_compat_props[0]);
494 object_compat_props[0] = compat_props;
495 }
496
497 void object_apply_compat_props(Object *obj)
498 {
499 int i;
500
501 for (i = 0; i < ARRAY_SIZE(object_compat_props); i++) {
502 object_apply_global_props(obj, object_compat_props[i],
503 i == 2 ? &error_fatal : &error_abort);
504 }
505 }
506
507 static void object_class_property_init_all(Object *obj)
508 {
509 ObjectPropertyIterator iter;
510 ObjectProperty *prop;
511
512 object_class_property_iter_init(&iter, object_get_class(obj));
513 while ((prop = object_property_iter_next(&iter))) {
514 if (prop->init) {
515 prop->init(obj, prop);
516 }
517 }
518 }
519
520 static void object_initialize_with_type(Object *obj, size_t size, TypeImpl *type)
521 {
522 type_initialize(type);
523
524 g_assert(type->instance_size >= sizeof(Object));
525 g_assert(type->abstract == false);
526 g_assert(size >= type->instance_size);
527
528 memset(obj, 0, type->instance_size);
529 obj->class = type->class;
530 object_ref(obj);
531 object_class_property_init_all(obj);
532 obj->properties = g_hash_table_new_full(g_str_hash, g_str_equal,
533 NULL, object_property_free);
534 object_init_with_type(obj, type);
535 object_post_init_with_type(obj, type);
536 }
537
538 void object_initialize(void *data, size_t size, const char *typename)
539 {
540 TypeImpl *type = type_get_by_name(typename);
541
542 #ifdef CONFIG_MODULES
543 if (!type) {
544 int rv = module_load_qom(typename, &error_fatal);
545 if (rv > 0) {
546 type = type_get_by_name(typename);
547 } else {
548 error_report("missing object type '%s'", typename);
549 exit(1);
550 }
551 }
552 #endif
553 if (!type) {
554 error_report("missing object type '%s'", typename);
555 abort();
556 }
557
558 object_initialize_with_type(data, size, type);
559 }
560
561 bool object_initialize_child_with_props(Object *parentobj,
562 const char *propname,
563 void *childobj, size_t size,
564 const char *type,
565 Error **errp, ...)
566 {
567 va_list vargs;
568 bool ok;
569
570 va_start(vargs, errp);
571 ok = object_initialize_child_with_propsv(parentobj, propname,
572 childobj, size, type, errp,
573 vargs);
574 va_end(vargs);
575 return ok;
576 }
577
578 bool object_initialize_child_with_propsv(Object *parentobj,
579 const char *propname,
580 void *childobj, size_t size,
581 const char *type,
582 Error **errp, va_list vargs)
583 {
584 bool ok = false;
585 Object *obj;
586 UserCreatable *uc;
587
588 object_initialize(childobj, size, type);
589 obj = OBJECT(childobj);
590
591 if (!object_set_propv(obj, errp, vargs)) {
592 goto out;
593 }
594
595 object_property_add_child(parentobj, propname, obj);
596
597 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
598 if (uc) {
599 if (!user_creatable_complete(uc, errp)) {
600 object_unparent(obj);
601 goto out;
602 }
603 }
604
605 ok = true;
606
607 out:
608 /*
609 * We want @obj's reference to be 1 on success, 0 on failure.
610 * On success, it's 2: one taken by object_initialize(), and one
611 * by object_property_add_child().
612 * On failure in object_initialize() or earlier, it's 1.
613 * On failure afterwards, it's also 1: object_unparent() releases
614 * the reference taken by object_property_add_child().
615 */
616 object_unref(obj);
617 return ok;
618 }
619
620 void object_initialize_child_internal(Object *parent,
621 const char *propname,
622 void *child, size_t size,
623 const char *type)
624 {
625 object_initialize_child_with_props(parent, propname, child, size, type,
626 &error_abort, NULL);
627 }
628
629 static inline bool object_property_is_child(ObjectProperty *prop)
630 {
631 return strstart(prop->type, "child<", NULL);
632 }
633
634 static void object_property_del_all(Object *obj)
635 {
636 g_autoptr(GHashTable) done = g_hash_table_new(NULL, NULL);
637 ObjectProperty *prop;
638 ObjectPropertyIterator iter;
639 bool released;
640
641 do {
642 released = false;
643 object_property_iter_init(&iter, obj);
644 while ((prop = object_property_iter_next(&iter)) != NULL) {
645 if (g_hash_table_add(done, prop)) {
646 if (prop->release) {
647 prop->release(obj, prop->name, prop->opaque);
648 released = true;
649 break;
650 }
651 }
652 }
653 } while (released);
654
655 g_hash_table_unref(obj->properties);
656 }
657
658 static void object_property_del_child(Object *obj, Object *child)
659 {
660 ObjectProperty *prop;
661 GHashTableIter iter;
662 gpointer key, value;
663
664 g_hash_table_iter_init(&iter, obj->properties);
665 while (g_hash_table_iter_next(&iter, &key, &value)) {
666 prop = value;
667 if (object_property_is_child(prop) && prop->opaque == child) {
668 if (prop->release) {
669 prop->release(obj, prop->name, prop->opaque);
670 prop->release = NULL;
671 }
672 break;
673 }
674 }
675 g_hash_table_iter_init(&iter, obj->properties);
676 while (g_hash_table_iter_next(&iter, &key, &value)) {
677 prop = value;
678 if (object_property_is_child(prop) && prop->opaque == child) {
679 g_hash_table_iter_remove(&iter);
680 break;
681 }
682 }
683 }
684
685 void object_unparent(Object *obj)
686 {
687 if (obj->parent) {
688 object_property_del_child(obj->parent, obj);
689 }
690 }
691
692 static void object_deinit(Object *obj, TypeImpl *type)
693 {
694 if (type->instance_finalize) {
695 type->instance_finalize(obj);
696 }
697
698 if (type_has_parent(type)) {
699 object_deinit(obj, type_get_parent(type));
700 }
701 }
702
703 static void object_finalize(void *data)
704 {
705 Object *obj = data;
706 TypeImpl *ti = obj->class->type;
707
708 object_property_del_all(obj);
709 object_deinit(obj, ti);
710
711 g_assert(obj->ref == 0);
712 g_assert(obj->parent == NULL);
713 if (obj->free) {
714 obj->free(obj);
715 }
716 }
717
718 /* Find the minimum alignment guaranteed by the system malloc. */
719 #if __STDC_VERSION__ >= 201112L
720 typedef max_align_t qemu_max_align_t;
721 #else
722 typedef union {
723 long l;
724 void *p;
725 double d;
726 long double ld;
727 } qemu_max_align_t;
728 #endif
729
730 static Object *object_new_with_type(Type type)
731 {
732 Object *obj;
733 size_t size, align;
734 void (*obj_free)(void *);
735
736 g_assert(type != NULL);
737 type_initialize(type);
738
739 size = type->instance_size;
740 align = type->instance_align;
741
742 /*
743 * Do not use qemu_memalign unless required. Depending on the
744 * implementation, extra alignment implies extra overhead.
745 */
746 if (likely(align <= __alignof__(qemu_max_align_t))) {
747 obj = g_malloc(size);
748 obj_free = g_free;
749 } else {
750 obj = qemu_memalign(align, size);
751 obj_free = qemu_vfree;
752 }
753
754 object_initialize_with_type(obj, size, type);
755 obj->free = obj_free;
756
757 return obj;
758 }
759
760 Object *object_new_with_class(ObjectClass *klass)
761 {
762 return object_new_with_type(klass->type);
763 }
764
765 Object *object_new(const char *typename)
766 {
767 TypeImpl *ti = type_get_by_name(typename);
768
769 return object_new_with_type(ti);
770 }
771
772
773 Object *object_new_with_props(const char *typename,
774 Object *parent,
775 const char *id,
776 Error **errp,
777 ...)
778 {
779 va_list vargs;
780 Object *obj;
781
782 va_start(vargs, errp);
783 obj = object_new_with_propv(typename, parent, id, errp, vargs);
784 va_end(vargs);
785
786 return obj;
787 }
788
789
790 Object *object_new_with_propv(const char *typename,
791 Object *parent,
792 const char *id,
793 Error **errp,
794 va_list vargs)
795 {
796 Object *obj;
797 ObjectClass *klass;
798 UserCreatable *uc;
799
800 klass = object_class_by_name(typename);
801 if (!klass) {
802 error_setg(errp, "invalid object type: %s", typename);
803 return NULL;
804 }
805
806 if (object_class_is_abstract(klass)) {
807 error_setg(errp, "object type '%s' is abstract", typename);
808 return NULL;
809 }
810 obj = object_new_with_type(klass->type);
811
812 if (!object_set_propv(obj, errp, vargs)) {
813 goto error;
814 }
815
816 if (id != NULL) {
817 object_property_add_child(parent, id, obj);
818 }
819
820 uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
821 if (uc) {
822 if (!user_creatable_complete(uc, errp)) {
823 if (id != NULL) {
824 object_unparent(obj);
825 }
826 goto error;
827 }
828 }
829
830 object_unref(obj);
831 return obj;
832
833 error:
834 object_unref(obj);
835 return NULL;
836 }
837
838
839 bool object_set_props(Object *obj,
840 Error **errp,
841 ...)
842 {
843 va_list vargs;
844 bool ret;
845
846 va_start(vargs, errp);
847 ret = object_set_propv(obj, errp, vargs);
848 va_end(vargs);
849
850 return ret;
851 }
852
853
854 bool object_set_propv(Object *obj,
855 Error **errp,
856 va_list vargs)
857 {
858 const char *propname;
859
860 propname = va_arg(vargs, char *);
861 while (propname != NULL) {
862 const char *value = va_arg(vargs, char *);
863
864 g_assert(value != NULL);
865 if (!object_property_parse(obj, propname, value, errp)) {
866 return false;
867 }
868 propname = va_arg(vargs, char *);
869 }
870
871 return true;
872 }
873
874
875 Object *object_dynamic_cast(Object *obj, const char *typename)
876 {
877 if (obj && object_class_dynamic_cast(object_get_class(obj), typename)) {
878 return obj;
879 }
880
881 return NULL;
882 }
883
884 Object *object_dynamic_cast_assert(Object *obj, const char *typename,
885 const char *file, int line, const char *func)
886 {
887 trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
888 typename, file, line, func);
889
890 #ifdef CONFIG_QOM_CAST_DEBUG
891 int i;
892 Object *inst;
893
894 for (i = 0; obj && i < OBJECT_CLASS_CAST_CACHE; i++) {
895 if (qatomic_read(&obj->class->object_cast_cache[i]) == typename) {
896 goto out;
897 }
898 }
899
900 inst = object_dynamic_cast(obj, typename);
901
902 if (!inst && obj) {
903 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
904 file, line, func, obj, typename);
905 abort();
906 }
907
908 assert(obj == inst);
909
910 if (obj && obj == inst) {
911 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
912 qatomic_set(&obj->class->object_cast_cache[i - 1],
913 qatomic_read(&obj->class->object_cast_cache[i]));
914 }
915 qatomic_set(&obj->class->object_cast_cache[i - 1], typename);
916 }
917
918 out:
919 #endif
920 return obj;
921 }
922
923 ObjectClass *object_class_dynamic_cast(ObjectClass *class,
924 const char *typename)
925 {
926 ObjectClass *ret = NULL;
927 TypeImpl *target_type;
928 TypeImpl *type;
929
930 if (!class) {
931 return NULL;
932 }
933
934 /* A simple fast path that can trigger a lot for leaf classes. */
935 type = class->type;
936 if (type->name == typename) {
937 return class;
938 }
939
940 target_type = type_get_by_name(typename);
941 if (!target_type) {
942 /* target class type unknown, so fail the cast */
943 return NULL;
944 }
945
946 if (type->class->interfaces &&
947 type_is_ancestor(target_type, type_interface)) {
948 int found = 0;
949 GSList *i;
950
951 for (i = class->interfaces; i; i = i->next) {
952 ObjectClass *target_class = i->data;
953
954 if (type_is_ancestor(target_class->type, target_type)) {
955 ret = target_class;
956 found++;
957 }
958 }
959
960 /* The match was ambiguous, don't allow a cast */
961 if (found > 1) {
962 ret = NULL;
963 }
964 } else if (type_is_ancestor(type, target_type)) {
965 ret = class;
966 }
967
968 return ret;
969 }
970
971 ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
972 const char *typename,
973 const char *file, int line,
974 const char *func)
975 {
976 ObjectClass *ret;
977
978 trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
979 typename, file, line, func);
980
981 #ifdef CONFIG_QOM_CAST_DEBUG
982 int i;
983
984 for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) {
985 if (qatomic_read(&class->class_cast_cache[i]) == typename) {
986 ret = class;
987 goto out;
988 }
989 }
990 #else
991 if (!class || !class->interfaces) {
992 return class;
993 }
994 #endif
995
996 ret = object_class_dynamic_cast(class, typename);
997 if (!ret && class) {
998 fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
999 file, line, func, class, typename);
1000 abort();
1001 }
1002
1003 #ifdef CONFIG_QOM_CAST_DEBUG
1004 if (class && ret == class) {
1005 for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) {
1006 qatomic_set(&class->class_cast_cache[i - 1],
1007 qatomic_read(&class->class_cast_cache[i]));
1008 }
1009 qatomic_set(&class->class_cast_cache[i - 1], typename);
1010 }
1011 out:
1012 #endif
1013 return ret;
1014 }
1015
1016 const char *object_get_typename(const Object *obj)
1017 {
1018 return obj->class->type->name;
1019 }
1020
1021 ObjectClass *object_get_class(Object *obj)
1022 {
1023 return obj->class;
1024 }
1025
1026 bool object_class_is_abstract(ObjectClass *klass)
1027 {
1028 return klass->type->abstract;
1029 }
1030
1031 const char *object_class_get_name(ObjectClass *klass)
1032 {
1033 return klass->type->name;
1034 }
1035
1036 ObjectClass *object_class_by_name(const char *typename)
1037 {
1038 TypeImpl *type = type_get_by_name(typename);
1039
1040 if (!type) {
1041 return NULL;
1042 }
1043
1044 type_initialize(type);
1045
1046 return type->class;
1047 }
1048
1049 ObjectClass *module_object_class_by_name(const char *typename)
1050 {
1051 ObjectClass *oc;
1052
1053 oc = object_class_by_name(typename);
1054 #ifdef CONFIG_MODULES
1055 if (!oc) {
1056 Error *local_err = NULL;
1057 int rv = module_load_qom(typename, &local_err);
1058 if (rv > 0) {
1059 oc = object_class_by_name(typename);
1060 } else if (rv < 0) {
1061 error_report_err(local_err);
1062 }
1063 }
1064 #endif
1065 return oc;
1066 }
1067
1068 ObjectClass *object_class_get_parent(ObjectClass *class)
1069 {
1070 TypeImpl *type = type_get_parent(class->type);
1071
1072 if (!type) {
1073 return NULL;
1074 }
1075
1076 type_initialize(type);
1077
1078 return type->class;
1079 }
1080
1081 typedef struct OCFData
1082 {
1083 void (*fn)(ObjectClass *klass, void *opaque);
1084 const char *implements_type;
1085 bool include_abstract;
1086 void *opaque;
1087 } OCFData;
1088
1089 static void object_class_foreach_tramp(gpointer key, gpointer value,
1090 gpointer opaque)
1091 {
1092 OCFData *data = opaque;
1093 TypeImpl *type = value;
1094 ObjectClass *k;
1095
1096 type_initialize(type);
1097 k = type->class;
1098
1099 if (!data->include_abstract && type->abstract) {
1100 return;
1101 }
1102
1103 if (data->implements_type &&
1104 !object_class_dynamic_cast(k, data->implements_type)) {
1105 return;
1106 }
1107
1108 data->fn(k, data->opaque);
1109 }
1110
1111 void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
1112 const char *implements_type, bool include_abstract,
1113 void *opaque)
1114 {
1115 OCFData data = { fn, implements_type, include_abstract, opaque };
1116
1117 enumerating_types = true;
1118 g_hash_table_foreach(type_table_get(), object_class_foreach_tramp, &data);
1119 enumerating_types = false;
1120 }
1121
1122 static int do_object_child_foreach(Object *obj,
1123 int (*fn)(Object *child, void *opaque),
1124 void *opaque, bool recurse)
1125 {
1126 GHashTableIter iter;
1127 ObjectProperty *prop;
1128 int ret = 0;
1129
1130 g_hash_table_iter_init(&iter, obj->properties);
1131 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
1132 if (object_property_is_child(prop)) {
1133 Object *child = prop->opaque;
1134
1135 ret = fn(child, opaque);
1136 if (ret != 0) {
1137 break;
1138 }
1139 if (recurse) {
1140 ret = do_object_child_foreach(child, fn, opaque, true);
1141 if (ret != 0) {
1142 break;
1143 }
1144 }
1145 }
1146 }
1147 return ret;
1148 }
1149
1150 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
1151 void *opaque)
1152 {
1153 return do_object_child_foreach(obj, fn, opaque, false);
1154 }
1155
1156 int object_child_foreach_recursive(Object *obj,
1157 int (*fn)(Object *child, void *opaque),
1158 void *opaque)
1159 {
1160 return do_object_child_foreach(obj, fn, opaque, true);
1161 }
1162
1163 static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
1164 {
1165 GSList **list = opaque;
1166
1167 *list = g_slist_prepend(*list, klass);
1168 }
1169
1170 GSList *object_class_get_list(const char *implements_type,
1171 bool include_abstract)
1172 {
1173 GSList *list = NULL;
1174
1175 object_class_foreach(object_class_get_list_tramp,
1176 implements_type, include_abstract, &list);
1177 return list;
1178 }
1179
1180 static gint object_class_cmp(gconstpointer a, gconstpointer b)
1181 {
1182 return strcasecmp(object_class_get_name((ObjectClass *)a),
1183 object_class_get_name((ObjectClass *)b));
1184 }
1185
1186 GSList *object_class_get_list_sorted(const char *implements_type,
1187 bool include_abstract)
1188 {
1189 return g_slist_sort(object_class_get_list(implements_type, include_abstract),
1190 object_class_cmp);
1191 }
1192
1193 Object *object_ref(void *objptr)
1194 {
1195 Object *obj = OBJECT(objptr);
1196 uint32_t ref;
1197
1198 if (!obj) {
1199 return NULL;
1200 }
1201 ref = qatomic_fetch_inc(&obj->ref);
1202 /* Assert waaay before the integer overflows */
1203 g_assert(ref < INT_MAX);
1204 return obj;
1205 }
1206
1207 void object_unref(void *objptr)
1208 {
1209 Object *obj = OBJECT(objptr);
1210 if (!obj) {
1211 return;
1212 }
1213 g_assert(obj->ref > 0);
1214
1215 /* parent always holds a reference to its children */
1216 if (qatomic_fetch_dec(&obj->ref) == 1) {
1217 object_finalize(obj);
1218 }
1219 }
1220
1221 ObjectProperty *
1222 object_property_try_add(Object *obj, const char *name, const char *type,
1223 ObjectPropertyAccessor *get,
1224 ObjectPropertyAccessor *set,
1225 ObjectPropertyRelease *release,
1226 void *opaque, Error **errp)
1227 {
1228 ObjectProperty *prop;
1229 size_t name_len = strlen(name);
1230
1231 if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
1232 int i;
1233 ObjectProperty *ret = NULL;
1234 char *name_no_array = g_strdup(name);
1235
1236 name_no_array[name_len - 3] = '\0';
1237 for (i = 0; i < INT16_MAX; ++i) {
1238 char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
1239
1240 ret = object_property_try_add(obj, full_name, type, get, set,
1241 release, opaque, NULL);
1242 g_free(full_name);
1243 if (ret) {
1244 break;
1245 }
1246 }
1247 g_free(name_no_array);
1248 assert(ret);
1249 return ret;
1250 }
1251
1252 if (object_property_find(obj, name) != NULL) {
1253 error_setg(errp, "attempt to add duplicate property '%s' to object (type '%s')",
1254 name, object_get_typename(obj));
1255 return NULL;
1256 }
1257
1258 prop = g_malloc0(sizeof(*prop));
1259
1260 prop->name = g_strdup(name);
1261 prop->type = g_strdup(type);
1262
1263 prop->get = get;
1264 prop->set = set;
1265 prop->release = release;
1266 prop->opaque = opaque;
1267
1268 g_hash_table_insert(obj->properties, prop->name, prop);
1269 return prop;
1270 }
1271
1272 ObjectProperty *
1273 object_property_add(Object *obj, const char *name, const char *type,
1274 ObjectPropertyAccessor *get,
1275 ObjectPropertyAccessor *set,
1276 ObjectPropertyRelease *release,
1277 void *opaque)
1278 {
1279 return object_property_try_add(obj, name, type, get, set, release,
1280 opaque, &error_abort);
1281 }
1282
1283 ObjectProperty *
1284 object_class_property_add(ObjectClass *klass,
1285 const char *name,
1286 const char *type,
1287 ObjectPropertyAccessor *get,
1288 ObjectPropertyAccessor *set,
1289 ObjectPropertyRelease *release,
1290 void *opaque)
1291 {
1292 ObjectProperty *prop;
1293
1294 assert(!object_class_property_find(klass, name));
1295
1296 prop = g_malloc0(sizeof(*prop));
1297
1298 prop->name = g_strdup(name);
1299 prop->type = g_strdup(type);
1300
1301 prop->get = get;
1302 prop->set = set;
1303 prop->release = release;
1304 prop->opaque = opaque;
1305
1306 g_hash_table_insert(klass->properties, prop->name, prop);
1307
1308 return prop;
1309 }
1310
1311 ObjectProperty *object_property_find(Object *obj, const char *name)
1312 {
1313 ObjectProperty *prop;
1314 ObjectClass *klass = object_get_class(obj);
1315
1316 prop = object_class_property_find(klass, name);
1317 if (prop) {
1318 return prop;
1319 }
1320
1321 return g_hash_table_lookup(obj->properties, name);
1322 }
1323
1324 ObjectProperty *object_property_find_err(Object *obj, const char *name,
1325 Error **errp)
1326 {
1327 ObjectProperty *prop = object_property_find(obj, name);
1328 if (!prop) {
1329 error_setg(errp, "Property '%s.%s' not found",
1330 object_get_typename(obj), name);
1331 }
1332 return prop;
1333 }
1334
1335 void object_property_iter_init(ObjectPropertyIterator *iter,
1336 Object *obj)
1337 {
1338 g_hash_table_iter_init(&iter->iter, obj->properties);
1339 iter->nextclass = object_get_class(obj);
1340 }
1341
1342 ObjectProperty *object_property_iter_next(ObjectPropertyIterator *iter)
1343 {
1344 gpointer key, val;
1345 while (!g_hash_table_iter_next(&iter->iter, &key, &val)) {
1346 if (!iter->nextclass) {
1347 return NULL;
1348 }
1349 g_hash_table_iter_init(&iter->iter, iter->nextclass->properties);
1350 iter->nextclass = object_class_get_parent(iter->nextclass);
1351 }
1352 return val;
1353 }
1354
1355 void object_class_property_iter_init(ObjectPropertyIterator *iter,
1356 ObjectClass *klass)
1357 {
1358 g_hash_table_iter_init(&iter->iter, klass->properties);
1359 iter->nextclass = object_class_get_parent(klass);
1360 }
1361
1362 ObjectProperty *object_class_property_find(ObjectClass *klass, const char *name)
1363 {
1364 ObjectClass *parent_klass;
1365
1366 parent_klass = object_class_get_parent(klass);
1367 if (parent_klass) {
1368 ObjectProperty *prop =
1369 object_class_property_find(parent_klass, name);
1370 if (prop) {
1371 return prop;
1372 }
1373 }
1374
1375 return g_hash_table_lookup(klass->properties, name);
1376 }
1377
1378 ObjectProperty *object_class_property_find_err(ObjectClass *klass,
1379 const char *name,
1380 Error **errp)
1381 {
1382 ObjectProperty *prop = object_class_property_find(klass, name);
1383 if (!prop) {
1384 error_setg(errp, "Property '.%s' not found", name);
1385 }
1386 return prop;
1387 }
1388
1389
1390 void object_property_del(Object *obj, const char *name)
1391 {
1392 ObjectProperty *prop = g_hash_table_lookup(obj->properties, name);
1393
1394 if (prop->release) {
1395 prop->release(obj, name, prop->opaque);
1396 }
1397 g_hash_table_remove(obj->properties, name);
1398 }
1399
1400 bool object_property_get(Object *obj, const char *name, Visitor *v,
1401 Error **errp)
1402 {
1403 Error *err = NULL;
1404 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1405
1406 if (prop == NULL) {
1407 return false;
1408 }
1409
1410 if (!prop->get) {
1411 error_setg(errp, "Property '%s.%s' is not readable",
1412 object_get_typename(obj), name);
1413 return false;
1414 }
1415 prop->get(obj, v, name, prop->opaque, &err);
1416 error_propagate(errp, err);
1417 return !err;
1418 }
1419
1420 bool object_property_set(Object *obj, const char *name, Visitor *v,
1421 Error **errp)
1422 {
1423 ERRP_GUARD();
1424 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1425
1426 if (prop == NULL) {
1427 return false;
1428 }
1429
1430 if (!prop->set) {
1431 error_setg(errp, "Property '%s.%s' is not writable",
1432 object_get_typename(obj), name);
1433 return false;
1434 }
1435 prop->set(obj, v, name, prop->opaque, errp);
1436 return !*errp;
1437 }
1438
1439 bool object_property_set_str(Object *obj, const char *name,
1440 const char *value, Error **errp)
1441 {
1442 QString *qstr = qstring_from_str(value);
1443 bool ok = object_property_set_qobject(obj, name, QOBJECT(qstr), errp);
1444
1445 qobject_unref(qstr);
1446 return ok;
1447 }
1448
1449 char *object_property_get_str(Object *obj, const char *name,
1450 Error **errp)
1451 {
1452 QObject *ret = object_property_get_qobject(obj, name, errp);
1453 QString *qstring;
1454 char *retval;
1455
1456 if (!ret) {
1457 return NULL;
1458 }
1459 qstring = qobject_to(QString, ret);
1460 if (!qstring) {
1461 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "string");
1462 retval = NULL;
1463 } else {
1464 retval = g_strdup(qstring_get_str(qstring));
1465 }
1466
1467 qobject_unref(ret);
1468 return retval;
1469 }
1470
1471 bool object_property_set_link(Object *obj, const char *name,
1472 Object *value, Error **errp)
1473 {
1474 g_autofree char *path = NULL;
1475
1476 if (value) {
1477 path = object_get_canonical_path(value);
1478 }
1479 return object_property_set_str(obj, name, path ?: "", errp);
1480 }
1481
1482 Object *object_property_get_link(Object *obj, const char *name,
1483 Error **errp)
1484 {
1485 char *str = object_property_get_str(obj, name, errp);
1486 Object *target = NULL;
1487
1488 if (str && *str) {
1489 target = object_resolve_path(str, NULL);
1490 if (!target) {
1491 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1492 "Device '%s' not found", str);
1493 }
1494 }
1495
1496 g_free(str);
1497 return target;
1498 }
1499
1500 bool object_property_set_bool(Object *obj, const char *name,
1501 bool value, Error **errp)
1502 {
1503 QBool *qbool = qbool_from_bool(value);
1504 bool ok = object_property_set_qobject(obj, name, QOBJECT(qbool), errp);
1505
1506 qobject_unref(qbool);
1507 return ok;
1508 }
1509
1510 bool object_property_get_bool(Object *obj, const char *name,
1511 Error **errp)
1512 {
1513 QObject *ret = object_property_get_qobject(obj, name, errp);
1514 QBool *qbool;
1515 bool retval;
1516
1517 if (!ret) {
1518 return false;
1519 }
1520 qbool = qobject_to(QBool, ret);
1521 if (!qbool) {
1522 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "boolean");
1523 retval = false;
1524 } else {
1525 retval = qbool_get_bool(qbool);
1526 }
1527
1528 qobject_unref(ret);
1529 return retval;
1530 }
1531
1532 bool object_property_set_int(Object *obj, const char *name,
1533 int64_t value, Error **errp)
1534 {
1535 QNum *qnum = qnum_from_int(value);
1536 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1537
1538 qobject_unref(qnum);
1539 return ok;
1540 }
1541
1542 int64_t object_property_get_int(Object *obj, const char *name,
1543 Error **errp)
1544 {
1545 QObject *ret = object_property_get_qobject(obj, name, errp);
1546 QNum *qnum;
1547 int64_t retval;
1548
1549 if (!ret) {
1550 return -1;
1551 }
1552
1553 qnum = qobject_to(QNum, ret);
1554 if (!qnum || !qnum_get_try_int(qnum, &retval)) {
1555 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "int");
1556 retval = -1;
1557 }
1558
1559 qobject_unref(ret);
1560 return retval;
1561 }
1562
1563 static void object_property_init_defval(Object *obj, ObjectProperty *prop)
1564 {
1565 Visitor *v = qobject_input_visitor_new(prop->defval);
1566
1567 assert(prop->set != NULL);
1568 prop->set(obj, v, prop->name, prop->opaque, &error_abort);
1569
1570 visit_free(v);
1571 }
1572
1573 static void object_property_set_default(ObjectProperty *prop, QObject *defval)
1574 {
1575 assert(!prop->defval);
1576 assert(!prop->init);
1577
1578 prop->defval = defval;
1579 prop->init = object_property_init_defval;
1580 }
1581
1582 void object_property_set_default_bool(ObjectProperty *prop, bool value)
1583 {
1584 object_property_set_default(prop, QOBJECT(qbool_from_bool(value)));
1585 }
1586
1587 void object_property_set_default_str(ObjectProperty *prop, const char *value)
1588 {
1589 object_property_set_default(prop, QOBJECT(qstring_from_str(value)));
1590 }
1591
1592 void object_property_set_default_list(ObjectProperty *prop)
1593 {
1594 object_property_set_default(prop, QOBJECT(qlist_new()));
1595 }
1596
1597 void object_property_set_default_int(ObjectProperty *prop, int64_t value)
1598 {
1599 object_property_set_default(prop, QOBJECT(qnum_from_int(value)));
1600 }
1601
1602 void object_property_set_default_uint(ObjectProperty *prop, uint64_t value)
1603 {
1604 object_property_set_default(prop, QOBJECT(qnum_from_uint(value)));
1605 }
1606
1607 bool object_property_set_uint(Object *obj, const char *name,
1608 uint64_t value, Error **errp)
1609 {
1610 QNum *qnum = qnum_from_uint(value);
1611 bool ok = object_property_set_qobject(obj, name, QOBJECT(qnum), errp);
1612
1613 qobject_unref(qnum);
1614 return ok;
1615 }
1616
1617 uint64_t object_property_get_uint(Object *obj, const char *name,
1618 Error **errp)
1619 {
1620 QObject *ret = object_property_get_qobject(obj, name, errp);
1621 QNum *qnum;
1622 uint64_t retval;
1623
1624 if (!ret) {
1625 return 0;
1626 }
1627 qnum = qobject_to(QNum, ret);
1628 if (!qnum || !qnum_get_try_uint(qnum, &retval)) {
1629 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, "uint");
1630 retval = 0;
1631 }
1632
1633 qobject_unref(ret);
1634 return retval;
1635 }
1636
1637 typedef struct EnumProperty {
1638 const QEnumLookup *lookup;
1639 int (*get)(Object *, Error **);
1640 void (*set)(Object *, int, Error **);
1641 } EnumProperty;
1642
1643 int object_property_get_enum(Object *obj, const char *name,
1644 const char *typename, Error **errp)
1645 {
1646 char *str;
1647 int ret;
1648 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1649 EnumProperty *enumprop;
1650
1651 if (prop == NULL) {
1652 return -1;
1653 }
1654
1655 if (!g_str_equal(prop->type, typename)) {
1656 error_setg(errp, "Property %s on %s is not '%s' enum type",
1657 name, object_class_get_name(
1658 object_get_class(obj)), typename);
1659 return -1;
1660 }
1661
1662 enumprop = prop->opaque;
1663
1664 str = object_property_get_str(obj, name, errp);
1665 if (!str) {
1666 return -1;
1667 }
1668
1669 ret = qapi_enum_parse(enumprop->lookup, str, -1, errp);
1670 g_free(str);
1671
1672 return ret;
1673 }
1674
1675 bool object_property_parse(Object *obj, const char *name,
1676 const char *string, Error **errp)
1677 {
1678 Visitor *v = string_input_visitor_new(string);
1679 bool ok = object_property_set(obj, name, v, errp);
1680
1681 visit_free(v);
1682 return ok;
1683 }
1684
1685 char *object_property_print(Object *obj, const char *name, bool human,
1686 Error **errp)
1687 {
1688 Visitor *v;
1689 char *string = NULL;
1690
1691 v = string_output_visitor_new(human, &string);
1692 if (!object_property_get(obj, name, v, errp)) {
1693 goto out;
1694 }
1695
1696 visit_complete(v, &string);
1697
1698 out:
1699 visit_free(v);
1700 return string;
1701 }
1702
1703 const char *object_property_get_type(Object *obj, const char *name, Error **errp)
1704 {
1705 ObjectProperty *prop = object_property_find_err(obj, name, errp);
1706 if (prop == NULL) {
1707 return NULL;
1708 }
1709
1710 return prop->type;
1711 }
1712
1713 Object *object_get_root(void)
1714 {
1715 static Object *root;
1716
1717 if (!root) {
1718 root = object_new("container");
1719 }
1720
1721 return root;
1722 }
1723
1724 Object *object_get_objects_root(void)
1725 {
1726 return container_get(object_get_root(), "/objects");
1727 }
1728
1729 Object *object_get_internal_root(void)
1730 {
1731 static Object *internal_root;
1732
1733 if (!internal_root) {
1734 internal_root = object_new("container");
1735 }
1736
1737 return internal_root;
1738 }
1739
1740 static void object_get_child_property(Object *obj, Visitor *v,
1741 const char *name, void *opaque,
1742 Error **errp)
1743 {
1744 Object *child = opaque;
1745 char *path;
1746
1747 path = object_get_canonical_path(child);
1748 visit_type_str(v, name, &path, errp);
1749 g_free(path);
1750 }
1751
1752 static Object *object_resolve_child_property(Object *parent, void *opaque,
1753 const char *part)
1754 {
1755 return opaque;
1756 }
1757
1758 static void object_finalize_child_property(Object *obj, const char *name,
1759 void *opaque)
1760 {
1761 Object *child = opaque;
1762
1763 if (child->class->unparent) {
1764 (child->class->unparent)(child);
1765 }
1766 child->parent = NULL;
1767 object_unref(child);
1768 }
1769
1770 ObjectProperty *
1771 object_property_try_add_child(Object *obj, const char *name,
1772 Object *child, Error **errp)
1773 {
1774 g_autofree char *type = NULL;
1775 ObjectProperty *op;
1776
1777 assert(!child->parent);
1778
1779 type = g_strdup_printf("child<%s>", object_get_typename(child));
1780
1781 op = object_property_try_add(obj, name, type, object_get_child_property,
1782 NULL, object_finalize_child_property,
1783 child, errp);
1784 if (!op) {
1785 return NULL;
1786 }
1787 op->resolve = object_resolve_child_property;
1788 object_ref(child);
1789 child->parent = obj;
1790 return op;
1791 }
1792
1793 ObjectProperty *
1794 object_property_add_child(Object *obj, const char *name,
1795 Object *child)
1796 {
1797 return object_property_try_add_child(obj, name, child, &error_abort);
1798 }
1799
1800 void object_property_allow_set_link(const Object *obj, const char *name,
1801 Object *val, Error **errp)
1802 {
1803 /* Allow the link to be set, always */
1804 }
1805
1806 typedef struct {
1807 union {
1808 Object **targetp;
1809 Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */
1810 ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
1811 };
1812 void (*check)(const Object *, const char *, Object *, Error **);
1813 ObjectPropertyLinkFlags flags;
1814 } LinkProperty;
1815
1816 static Object **
1817 object_link_get_targetp(Object *obj, LinkProperty *lprop)
1818 {
1819 if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
1820 return &lprop->target;
1821 } else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
1822 return (void *)obj + lprop->offset;
1823 } else {
1824 return lprop->targetp;
1825 }
1826 }
1827
1828 static void object_get_link_property(Object *obj, Visitor *v,
1829 const char *name, void *opaque,
1830 Error **errp)
1831 {
1832 LinkProperty *lprop = opaque;
1833 Object **targetp = object_link_get_targetp(obj, lprop);
1834 char *path;
1835
1836 if (*targetp) {
1837 path = object_get_canonical_path(*targetp);
1838 visit_type_str(v, name, &path, errp);
1839 g_free(path);
1840 } else {
1841 path = (char *)"";
1842 visit_type_str(v, name, &path, errp);
1843 }
1844 }
1845
1846 /*
1847 * object_resolve_link:
1848 *
1849 * Lookup an object and ensure its type matches the link property type. This
1850 * is similar to object_resolve_path() except type verification against the
1851 * link property is performed.
1852 *
1853 * Returns: The matched object or NULL on path lookup failures.
1854 */
1855 static Object *object_resolve_link(Object *obj, const char *name,
1856 const char *path, Error **errp)
1857 {
1858 const char *type;
1859 char *target_type;
1860 bool ambiguous = false;
1861 Object *target;
1862
1863 /* Go from link<FOO> to FOO. */
1864 type = object_property_get_type(obj, name, NULL);
1865 target_type = g_strndup(&type[5], strlen(type) - 6);
1866 target = object_resolve_path_type(path, target_type, &ambiguous);
1867
1868 if (ambiguous) {
1869 error_setg(errp, "Path '%s' does not uniquely identify an object",
1870 path);
1871 } else if (!target) {
1872 target = object_resolve_path(path, &ambiguous);
1873 if (target || ambiguous) {
1874 error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name, target_type);
1875 } else {
1876 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1877 "Device '%s' not found", path);
1878 }
1879 target = NULL;
1880 }
1881 g_free(target_type);
1882
1883 return target;
1884 }
1885
1886 static void object_set_link_property(Object *obj, Visitor *v,
1887 const char *name, void *opaque,
1888 Error **errp)
1889 {
1890 Error *local_err = NULL;
1891 LinkProperty *prop = opaque;
1892 Object **targetp = object_link_get_targetp(obj, prop);
1893 Object *old_target = *targetp;
1894 Object *new_target;
1895 char *path = NULL;
1896
1897 if (!visit_type_str(v, name, &path, errp)) {
1898 return;
1899 }
1900
1901 if (*path) {
1902 new_target = object_resolve_link(obj, name, path, errp);
1903 if (!new_target) {
1904 g_free(path);
1905 return;
1906 }
1907 } else {
1908 new_target = NULL;
1909 }
1910
1911 g_free(path);
1912
1913 prop->check(obj, name, new_target, &local_err);
1914 if (local_err) {
1915 error_propagate(errp, local_err);
1916 return;
1917 }
1918
1919 *targetp = new_target;
1920 if (prop->flags & OBJ_PROP_LINK_STRONG) {
1921 object_ref(new_target);
1922 object_unref(old_target);
1923 }
1924 }
1925
1926 static Object *object_resolve_link_property(Object *parent, void *opaque,
1927 const char *part)
1928 {
1929 LinkProperty *lprop = opaque;
1930
1931 return *object_link_get_targetp(parent, lprop);
1932 }
1933
1934 static void object_release_link_property(Object *obj, const char *name,
1935 void *opaque)
1936 {
1937 LinkProperty *prop = opaque;
1938 Object **targetp = object_link_get_targetp(obj, prop);
1939
1940 if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
1941 object_unref(*targetp);
1942 }
1943 if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
1944 g_free(prop);
1945 }
1946 }
1947
1948 static ObjectProperty *
1949 object_add_link_prop(Object *obj, const char *name,
1950 const char *type, void *ptr,
1951 void (*check)(const Object *, const char *,
1952 Object *, Error **),
1953 ObjectPropertyLinkFlags flags)
1954 {
1955 LinkProperty *prop = g_malloc(sizeof(*prop));
1956 g_autofree char *full_type = NULL;
1957 ObjectProperty *op;
1958
1959 if (flags & OBJ_PROP_LINK_DIRECT) {
1960 prop->target = ptr;
1961 } else {
1962 prop->targetp = ptr;
1963 }
1964 prop->check = check;
1965 prop->flags = flags;
1966
1967 full_type = g_strdup_printf("link<%s>", type);
1968
1969 op = object_property_add(obj, name, full_type,
1970 object_get_link_property,
1971 check ? object_set_link_property : NULL,
1972 object_release_link_property,
1973 prop);
1974 op->resolve = object_resolve_link_property;
1975 return op;
1976 }
1977
1978 ObjectProperty *
1979 object_property_add_link(Object *obj, const char *name,
1980 const char *type, Object **targetp,
1981 void (*check)(const Object *, const char *,
1982 Object *, Error **),
1983 ObjectPropertyLinkFlags flags)
1984 {
1985 return object_add_link_prop(obj, name, type, targetp, check, flags);
1986 }
1987
1988 ObjectProperty *
1989 object_class_property_add_link(ObjectClass *oc,
1990 const char *name,
1991 const char *type, ptrdiff_t offset,
1992 void (*check)(const Object *obj, const char *name,
1993 Object *val, Error **errp),
1994 ObjectPropertyLinkFlags flags)
1995 {
1996 LinkProperty *prop = g_new0(LinkProperty, 1);
1997 char *full_type;
1998 ObjectProperty *op;
1999
2000 prop->offset = offset;
2001 prop->check = check;
2002 prop->flags = flags | OBJ_PROP_LINK_CLASS;
2003
2004 full_type = g_strdup_printf("link<%s>", type);
2005
2006 op = object_class_property_add(oc, name, full_type,
2007 object_get_link_property,
2008 check ? object_set_link_property : NULL,
2009 object_release_link_property,
2010 prop);
2011
2012 op->resolve = object_resolve_link_property;
2013
2014 g_free(full_type);
2015 return op;
2016 }
2017
2018 ObjectProperty *
2019 object_property_add_const_link(Object *obj, const char *name,
2020 Object *target)
2021 {
2022 return object_add_link_prop(obj, name,
2023 object_get_typename(target), target,
2024 NULL, OBJ_PROP_LINK_DIRECT);
2025 }
2026
2027 const char *object_get_canonical_path_component(const Object *obj)
2028 {
2029 ObjectProperty *prop = NULL;
2030 GHashTableIter iter;
2031
2032 if (obj->parent == NULL) {
2033 return NULL;
2034 }
2035
2036 g_hash_table_iter_init(&iter, obj->parent->properties);
2037 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2038 if (!object_property_is_child(prop)) {
2039 continue;
2040 }
2041
2042 if (prop->opaque == obj) {
2043 return prop->name;
2044 }
2045 }
2046
2047 /* obj had a parent but was not a child, should never happen */
2048 g_assert_not_reached();
2049 return NULL;
2050 }
2051
2052 char *object_get_canonical_path(const Object *obj)
2053 {
2054 Object *root = object_get_root();
2055 char *newpath, *path = NULL;
2056
2057 if (obj == root) {
2058 return g_strdup("/");
2059 }
2060
2061 do {
2062 const char *component = object_get_canonical_path_component(obj);
2063
2064 if (!component) {
2065 /* A canonical path must be complete, so discard what was
2066 * collected so far.
2067 */
2068 g_free(path);
2069 return NULL;
2070 }
2071
2072 newpath = g_strdup_printf("/%s%s", component, path ? path : "");
2073 g_free(path);
2074 path = newpath;
2075 obj = obj->parent;
2076 } while (obj != root);
2077
2078 return path;
2079 }
2080
2081 Object *object_resolve_path_component(Object *parent, const char *part)
2082 {
2083 ObjectProperty *prop = object_property_find(parent, part);
2084 if (prop == NULL) {
2085 return NULL;
2086 }
2087
2088 if (prop->resolve) {
2089 return prop->resolve(parent, prop->opaque, part);
2090 } else {
2091 return NULL;
2092 }
2093 }
2094
2095 static Object *object_resolve_abs_path(Object *parent,
2096 char **parts,
2097 const char *typename)
2098 {
2099 Object *child;
2100
2101 if (*parts == NULL) {
2102 return object_dynamic_cast(parent, typename);
2103 }
2104
2105 if (strcmp(*parts, "") == 0) {
2106 return object_resolve_abs_path(parent, parts + 1, typename);
2107 }
2108
2109 child = object_resolve_path_component(parent, *parts);
2110 if (!child) {
2111 return NULL;
2112 }
2113
2114 return object_resolve_abs_path(child, parts + 1, typename);
2115 }
2116
2117 static Object *object_resolve_partial_path(Object *parent,
2118 char **parts,
2119 const char *typename,
2120 bool *ambiguous)
2121 {
2122 Object *obj;
2123 GHashTableIter iter;
2124 ObjectProperty *prop;
2125
2126 obj = object_resolve_abs_path(parent, parts, typename);
2127
2128 g_hash_table_iter_init(&iter, parent->properties);
2129 while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&prop)) {
2130 Object *found;
2131
2132 if (!object_property_is_child(prop)) {
2133 continue;
2134 }
2135
2136 found = object_resolve_partial_path(prop->opaque, parts,
2137 typename, ambiguous);
2138 if (found) {
2139 if (obj) {
2140 *ambiguous = true;
2141 return NULL;
2142 }
2143 obj = found;
2144 }
2145
2146 if (*ambiguous) {
2147 return NULL;
2148 }
2149 }
2150
2151 return obj;
2152 }
2153
2154 Object *object_resolve_path_type(const char *path, const char *typename,
2155 bool *ambiguousp)
2156 {
2157 Object *obj;
2158 char **parts;
2159
2160 parts = g_strsplit(path, "/", 0);
2161 assert(parts);
2162
2163 if (parts[0] == NULL || strcmp(parts[0], "") != 0) {
2164 bool ambiguous = false;
2165 obj = object_resolve_partial_path(object_get_root(), parts,
2166 typename, &ambiguous);
2167 if (ambiguousp) {
2168 *ambiguousp = ambiguous;
2169 }
2170 } else {
2171 obj = object_resolve_abs_path(object_get_root(), parts + 1, typename);
2172 }
2173
2174 g_strfreev(parts);
2175
2176 return obj;
2177 }
2178
2179 Object *object_resolve_path(const char *path, bool *ambiguous)
2180 {
2181 return object_resolve_path_type(path, TYPE_OBJECT, ambiguous);
2182 }
2183
2184 Object *object_resolve_path_at(Object *parent, const char *path)
2185 {
2186 g_auto(GStrv) parts = g_strsplit(path, "/", 0);
2187
2188 if (*path == '/') {
2189 return object_resolve_abs_path(object_get_root(), parts + 1,
2190 TYPE_OBJECT);
2191 }
2192 return object_resolve_abs_path(parent, parts, TYPE_OBJECT);
2193 }
2194
2195 typedef struct StringProperty
2196 {
2197 char *(*get)(Object *, Error **);
2198 void (*set)(Object *, const char *, Error **);
2199 } StringProperty;
2200
2201 static void property_get_str(Object *obj, Visitor *v, const char *name,
2202 void *opaque, Error **errp)
2203 {
2204 StringProperty *prop = opaque;
2205 char *value;
2206 Error *err = NULL;
2207
2208 value = prop->get(obj, &err);
2209 if (err) {
2210 error_propagate(errp, err);
2211 return;
2212 }
2213
2214 visit_type_str(v, name, &value, errp);
2215 g_free(value);
2216 }
2217
2218 static void property_set_str(Object *obj, Visitor *v, const char *name,
2219 void *opaque, Error **errp)
2220 {
2221 StringProperty *prop = opaque;
2222 char *value;
2223
2224 if (!visit_type_str(v, name, &value, errp)) {
2225 return;
2226 }
2227
2228 prop->set(obj, value, errp);
2229 g_free(value);
2230 }
2231
2232 static void property_release_data(Object *obj, const char *name,
2233 void *opaque)
2234 {
2235 g_free(opaque);
2236 }
2237
2238 ObjectProperty *
2239 object_property_add_str(Object *obj, const char *name,
2240 char *(*get)(Object *, Error **),
2241 void (*set)(Object *, const char *, Error **))
2242 {
2243 StringProperty *prop = g_malloc0(sizeof(*prop));
2244
2245 prop->get = get;
2246 prop->set = set;
2247
2248 return object_property_add(obj, name, "string",
2249 get ? property_get_str : NULL,
2250 set ? property_set_str : NULL,
2251 property_release_data,
2252 prop);
2253 }
2254
2255 ObjectProperty *
2256 object_class_property_add_str(ObjectClass *klass, const char *name,
2257 char *(*get)(Object *, Error **),
2258 void (*set)(Object *, const char *,
2259 Error **))
2260 {
2261 StringProperty *prop = g_malloc0(sizeof(*prop));
2262
2263 prop->get = get;
2264 prop->set = set;
2265
2266 return object_class_property_add(klass, name, "string",
2267 get ? property_get_str : NULL,
2268 set ? property_set_str : NULL,
2269 NULL,
2270 prop);
2271 }
2272
2273 typedef struct BoolProperty
2274 {
2275 bool (*get)(Object *, Error **);
2276 void (*set)(Object *, bool, Error **);
2277 } BoolProperty;
2278
2279 static void property_get_bool(Object *obj, Visitor *v, const char *name,
2280 void *opaque, Error **errp)
2281 {
2282 BoolProperty *prop = opaque;
2283 bool value;
2284 Error *err = NULL;
2285
2286 value = prop->get(obj, &err);
2287 if (err) {
2288 error_propagate(errp, err);
2289 return;
2290 }
2291
2292 visit_type_bool(v, name, &value, errp);
2293 }
2294
2295 static void property_set_bool(Object *obj, Visitor *v, const char *name,
2296 void *opaque, Error **errp)
2297 {
2298 BoolProperty *prop = opaque;
2299 bool value;
2300
2301 if (!visit_type_bool(v, name, &value, errp)) {
2302 return;
2303 }
2304
2305 prop->set(obj, value, errp);
2306 }
2307
2308 ObjectProperty *
2309 object_property_add_bool(Object *obj, const char *name,
2310 bool (*get)(Object *, Error **),
2311 void (*set)(Object *, bool, Error **))
2312 {
2313 BoolProperty *prop = g_malloc0(sizeof(*prop));
2314
2315 prop->get = get;
2316 prop->set = set;
2317
2318 return object_property_add(obj, name, "bool",
2319 get ? property_get_bool : NULL,
2320 set ? property_set_bool : NULL,
2321 property_release_data,
2322 prop);
2323 }
2324
2325 ObjectProperty *
2326 object_class_property_add_bool(ObjectClass *klass, const char *name,
2327 bool (*get)(Object *, Error **),
2328 void (*set)(Object *, bool, Error **))
2329 {
2330 BoolProperty *prop = g_malloc0(sizeof(*prop));
2331
2332 prop->get = get;
2333 prop->set = set;
2334
2335 return object_class_property_add(klass, name, "bool",
2336 get ? property_get_bool : NULL,
2337 set ? property_set_bool : NULL,
2338 NULL,
2339 prop);
2340 }
2341
2342 static void property_get_enum(Object *obj, Visitor *v, const char *name,
2343 void *opaque, Error **errp)
2344 {
2345 EnumProperty *prop = opaque;
2346 int value;
2347 Error *err = NULL;
2348
2349 value = prop->get(obj, &err);
2350 if (err) {
2351 error_propagate(errp, err);
2352 return;
2353 }
2354
2355 visit_type_enum(v, name, &value, prop->lookup, errp);
2356 }
2357
2358 static void property_set_enum(Object *obj, Visitor *v, const char *name,
2359 void *opaque, Error **errp)
2360 {
2361 EnumProperty *prop = opaque;
2362 int value;
2363
2364 if (!visit_type_enum(v, name, &value, prop->lookup, errp)) {
2365 return;
2366 }
2367 prop->set(obj, value, errp);
2368 }
2369
2370 ObjectProperty *
2371 object_property_add_enum(Object *obj, const char *name,
2372 const char *typename,
2373 const QEnumLookup *lookup,
2374 int (*get)(Object *, Error **),
2375 void (*set)(Object *, int, Error **))
2376 {
2377 EnumProperty *prop = g_malloc(sizeof(*prop));
2378
2379 prop->lookup = lookup;
2380 prop->get = get;
2381 prop->set = set;
2382
2383 return object_property_add(obj, name, typename,
2384 get ? property_get_enum : NULL,
2385 set ? property_set_enum : NULL,
2386 property_release_data,
2387 prop);
2388 }
2389
2390 ObjectProperty *
2391 object_class_property_add_enum(ObjectClass *klass, const char *name,
2392 const char *typename,
2393 const QEnumLookup *lookup,
2394 int (*get)(Object *, Error **),
2395 void (*set)(Object *, int, Error **))
2396 {
2397 EnumProperty *prop = g_malloc(sizeof(*prop));
2398
2399 prop->lookup = lookup;
2400 prop->get = get;
2401 prop->set = set;
2402
2403 return object_class_property_add(klass, name, typename,
2404 get ? property_get_enum : NULL,
2405 set ? property_set_enum : NULL,
2406 NULL,
2407 prop);
2408 }
2409
2410 typedef struct TMProperty {
2411 void (*get)(Object *, struct tm *, Error **);
2412 } TMProperty;
2413
2414 static void property_get_tm(Object *obj, Visitor *v, const char *name,
2415 void *opaque, Error **errp)
2416 {
2417 TMProperty *prop = opaque;
2418 Error *err = NULL;
2419 struct tm value;
2420
2421 prop->get(obj, &value, &err);
2422 if (err) {
2423 error_propagate(errp, err);
2424 return;
2425 }
2426
2427 if (!visit_start_struct(v, name, NULL, 0, errp)) {
2428 return;
2429 }
2430 if (!visit_type_int32(v, "tm_year", &value.tm_year, errp)) {
2431 goto out_end;
2432 }
2433 if (!visit_type_int32(v, "tm_mon", &value.tm_mon, errp)) {
2434 goto out_end;
2435 }
2436 if (!visit_type_int32(v, "tm_mday", &value.tm_mday, errp)) {
2437 goto out_end;
2438 }
2439 if (!visit_type_int32(v, "tm_hour", &value.tm_hour, errp)) {
2440 goto out_end;
2441 }
2442 if (!visit_type_int32(v, "tm_min", &value.tm_min, errp)) {
2443 goto out_end;
2444 }
2445 if (!visit_type_int32(v, "tm_sec", &value.tm_sec, errp)) {
2446 goto out_end;
2447 }
2448 visit_check_struct(v, errp);
2449 out_end:
2450 visit_end_struct(v, NULL);
2451 }
2452
2453 ObjectProperty *
2454 object_property_add_tm(Object *obj, const char *name,
2455 void (*get)(Object *, struct tm *, Error **))
2456 {
2457 TMProperty *prop = g_malloc0(sizeof(*prop));
2458
2459 prop->get = get;
2460
2461 return object_property_add(obj, name, "struct tm",
2462 get ? property_get_tm : NULL, NULL,
2463 property_release_data,
2464 prop);
2465 }
2466
2467 ObjectProperty *
2468 object_class_property_add_tm(ObjectClass *klass, const char *name,
2469 void (*get)(Object *, struct tm *, Error **))
2470 {
2471 TMProperty *prop = g_malloc0(sizeof(*prop));
2472
2473 prop->get = get;
2474
2475 return object_class_property_add(klass, name, "struct tm",
2476 get ? property_get_tm : NULL,
2477 NULL, NULL, prop);
2478 }
2479
2480 static char *object_get_type(Object *obj, Error **errp)
2481 {
2482 return g_strdup(object_get_typename(obj));
2483 }
2484
2485 static void property_get_uint8_ptr(Object *obj, Visitor *v, const char *name,
2486 void *opaque, Error **errp)
2487 {
2488 uint8_t value = *(uint8_t *)opaque;
2489 visit_type_uint8(v, name, &value, errp);
2490 }
2491
2492 static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
2493 void *opaque, Error **errp)
2494 {
2495 uint8_t *field = opaque;
2496 uint8_t value;
2497
2498 if (!visit_type_uint8(v, name, &value, errp)) {
2499 return;
2500 }
2501
2502 *field = value;
2503 }
2504
2505 static void property_get_uint16_ptr(Object *obj, Visitor *v, const char *name,
2506 void *opaque, Error **errp)
2507 {
2508 uint16_t value = *(uint16_t *)opaque;
2509 visit_type_uint16(v, name, &value, errp);
2510 }
2511
2512 static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
2513 void *opaque, Error **errp)
2514 {
2515 uint16_t *field = opaque;
2516 uint16_t value;
2517
2518 if (!visit_type_uint16(v, name, &value, errp)) {
2519 return;
2520 }
2521
2522 *field = value;
2523 }
2524
2525 static void property_get_uint32_ptr(Object *obj, Visitor *v, const char *name,
2526 void *opaque, Error **errp)
2527 {
2528 uint32_t value = *(uint32_t *)opaque;
2529 visit_type_uint32(v, name, &value, errp);
2530 }
2531
2532 static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
2533 void *opaque, Error **errp)
2534 {
2535 uint32_t *field = opaque;
2536 uint32_t value;
2537
2538 if (!visit_type_uint32(v, name, &value, errp)) {
2539 return;
2540 }
2541
2542 *field = value;
2543 }
2544
2545 static void property_get_uint64_ptr(Object *obj, Visitor *v, const char *name,
2546 void *opaque, Error **errp)
2547 {
2548 uint64_t value = *(uint64_t *)opaque;
2549 visit_type_uint64(v, name, &value, errp);
2550 }
2551
2552 static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
2553 void *opaque, Error **errp)
2554 {
2555 uint64_t *field = opaque;
2556 uint64_t value;
2557
2558 if (!visit_type_uint64(v, name, &value, errp)) {
2559 return;
2560 }
2561
2562 *field = value;
2563 }
2564
2565 ObjectProperty *
2566 object_property_add_uint8_ptr(Object *obj, const char *name,
2567 const uint8_t *v,
2568 ObjectPropertyFlags flags)
2569 {
2570 ObjectPropertyAccessor *getter = NULL;
2571 ObjectPropertyAccessor *setter = NULL;
2572
2573 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2574 getter = property_get_uint8_ptr;
2575 }
2576
2577 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2578 setter = property_set_uint8_ptr;
2579 }
2580
2581 return object_property_add(obj, name, "uint8",
2582 getter, setter, NULL, (void *)v);
2583 }
2584
2585 ObjectProperty *
2586 object_class_property_add_uint8_ptr(ObjectClass *klass, const char *name,
2587 const uint8_t *v,
2588 ObjectPropertyFlags flags)
2589 {
2590 ObjectPropertyAccessor *getter = NULL;
2591 ObjectPropertyAccessor *setter = NULL;
2592
2593 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2594 getter = property_get_uint8_ptr;
2595 }
2596
2597 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2598 setter = property_set_uint8_ptr;
2599 }
2600
2601 return object_class_property_add(klass, name, "uint8",
2602 getter, setter, NULL, (void *)v);
2603 }
2604
2605 ObjectProperty *
2606 object_property_add_uint16_ptr(Object *obj, const char *name,
2607 const uint16_t *v,
2608 ObjectPropertyFlags flags)
2609 {
2610 ObjectPropertyAccessor *getter = NULL;
2611 ObjectPropertyAccessor *setter = NULL;
2612
2613 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2614 getter = property_get_uint16_ptr;
2615 }
2616
2617 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2618 setter = property_set_uint16_ptr;
2619 }
2620
2621 return object_property_add(obj, name, "uint16",
2622 getter, setter, NULL, (void *)v);
2623 }
2624
2625 ObjectProperty *
2626 object_class_property_add_uint16_ptr(ObjectClass *klass, const char *name,
2627 const uint16_t *v,
2628 ObjectPropertyFlags flags)
2629 {
2630 ObjectPropertyAccessor *getter = NULL;
2631 ObjectPropertyAccessor *setter = NULL;
2632
2633 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2634 getter = property_get_uint16_ptr;
2635 }
2636
2637 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2638 setter = property_set_uint16_ptr;
2639 }
2640
2641 return object_class_property_add(klass, name, "uint16",
2642 getter, setter, NULL, (void *)v);
2643 }
2644
2645 ObjectProperty *
2646 object_property_add_uint32_ptr(Object *obj, const char *name,
2647 const uint32_t *v,
2648 ObjectPropertyFlags flags)
2649 {
2650 ObjectPropertyAccessor *getter = NULL;
2651 ObjectPropertyAccessor *setter = NULL;
2652
2653 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2654 getter = property_get_uint32_ptr;
2655 }
2656
2657 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2658 setter = property_set_uint32_ptr;
2659 }
2660
2661 return object_property_add(obj, name, "uint32",
2662 getter, setter, NULL, (void *)v);
2663 }
2664
2665 ObjectProperty *
2666 object_class_property_add_uint32_ptr(ObjectClass *klass, const char *name,
2667 const uint32_t *v,
2668 ObjectPropertyFlags flags)
2669 {
2670 ObjectPropertyAccessor *getter = NULL;
2671 ObjectPropertyAccessor *setter = NULL;
2672
2673 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2674 getter = property_get_uint32_ptr;
2675 }
2676
2677 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2678 setter = property_set_uint32_ptr;
2679 }
2680
2681 return object_class_property_add(klass, name, "uint32",
2682 getter, setter, NULL, (void *)v);
2683 }
2684
2685 ObjectProperty *
2686 object_property_add_uint64_ptr(Object *obj, const char *name,
2687 const uint64_t *v,
2688 ObjectPropertyFlags flags)
2689 {
2690 ObjectPropertyAccessor *getter = NULL;
2691 ObjectPropertyAccessor *setter = NULL;
2692
2693 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2694 getter = property_get_uint64_ptr;
2695 }
2696
2697 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2698 setter = property_set_uint64_ptr;
2699 }
2700
2701 return object_property_add(obj, name, "uint64",
2702 getter, setter, NULL, (void *)v);
2703 }
2704
2705 ObjectProperty *
2706 object_class_property_add_uint64_ptr(ObjectClass *klass, const char *name,
2707 const uint64_t *v,
2708 ObjectPropertyFlags flags)
2709 {
2710 ObjectPropertyAccessor *getter = NULL;
2711 ObjectPropertyAccessor *setter = NULL;
2712
2713 if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) {
2714 getter = property_get_uint64_ptr;
2715 }
2716
2717 if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) {
2718 setter = property_set_uint64_ptr;
2719 }
2720
2721 return object_class_property_add(klass, name, "uint64",
2722 getter, setter, NULL, (void *)v);
2723 }
2724
2725 typedef struct {
2726 Object *target_obj;
2727 char *target_name;
2728 } AliasProperty;
2729
2730 static void property_get_alias(Object *obj, Visitor *v, const char *name,
2731 void *opaque, Error **errp)
2732 {
2733 AliasProperty *prop = opaque;
2734 Visitor *alias_v = visitor_forward_field(v, prop->target_name, name);
2735
2736 object_property_get(prop->target_obj, prop->target_name, alias_v, errp);
2737 visit_free(alias_v);
2738 }
2739
2740 static void property_set_alias(Object *obj, Visitor *v, const char *name,
2741 void *opaque, Error **errp)
2742 {
2743 AliasProperty *prop = opaque;
2744 Visitor *alias_v = visitor_forward_field(v, prop->target_name, name);
2745
2746 object_property_set(prop->target_obj, prop->target_name, alias_v, errp);
2747 visit_free(alias_v);
2748 }
2749
2750 static Object *property_resolve_alias(Object *obj, void *opaque,
2751 const char *part)
2752 {
2753 AliasProperty *prop = opaque;
2754
2755 return object_resolve_path_component(prop->target_obj, prop->target_name);
2756 }
2757
2758 static void property_release_alias(Object *obj, const char *name, void *opaque)
2759 {
2760 AliasProperty *prop = opaque;
2761
2762 g_free(prop->target_name);
2763 g_free(prop);
2764 }
2765
2766 ObjectProperty *
2767 object_property_add_alias(Object *obj, const char *name,
2768 Object *target_obj, const char *target_name)
2769 {
2770 AliasProperty *prop;
2771 ObjectProperty *op;
2772 ObjectProperty *target_prop;
2773 g_autofree char *prop_type = NULL;
2774
2775 target_prop = object_property_find_err(target_obj, target_name,
2776 &error_abort);
2777
2778 if (object_property_is_child(target_prop)) {
2779 prop_type = g_strdup_printf("link%s",
2780 target_prop->type + strlen("child"));
2781 } else {
2782 prop_type = g_strdup(target_prop->type);
2783 }
2784
2785 prop = g_malloc(sizeof(*prop));
2786 prop->target_obj = target_obj;
2787 prop->target_name = g_strdup(target_name);
2788
2789 op = object_property_add(obj, name, prop_type,
2790 property_get_alias,
2791 property_set_alias,
2792 property_release_alias,
2793 prop);
2794 op->resolve = property_resolve_alias;
2795 if (target_prop->defval) {
2796 op->defval = qobject_ref(target_prop->defval);
2797 }
2798
2799 object_property_set_description(obj, op->name,
2800 target_prop->description);
2801 return op;
2802 }
2803
2804 void object_property_set_description(Object *obj, const char *name,
2805 const char *description)
2806 {
2807 ObjectProperty *op;
2808
2809 op = object_property_find_err(obj, name, &error_abort);
2810 g_free(op->description);
2811 op->description = g_strdup(description);
2812 }
2813
2814 void object_class_property_set_description(ObjectClass *klass,
2815 const char *name,
2816 const char *description)
2817 {
2818 ObjectProperty *op;
2819
2820 op = g_hash_table_lookup(klass->properties, name);
2821 g_free(op->description);
2822 op->description = g_strdup(description);
2823 }
2824
2825 static void object_class_init(ObjectClass *klass, void *data)
2826 {
2827 object_class_property_add_str(klass, "type", object_get_type,
2828 NULL);
2829 }
2830
2831 static void register_types(void)
2832 {
2833 static const TypeInfo interface_info = {
2834 .name = TYPE_INTERFACE,
2835 .class_size = sizeof(InterfaceClass),
2836 .abstract = true,
2837 };
2838
2839 static const TypeInfo object_info = {
2840 .name = TYPE_OBJECT,
2841 .instance_size = sizeof(Object),
2842 .class_init = object_class_init,
2843 .abstract = true,
2844 };
2845
2846 type_interface = type_register_internal(&interface_info);
2847 type_register_internal(&object_info);
2848 }
2849
2850 type_init(register_types)
armbru's QEMU hackery