2 * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include "ubusd_obj.h"
17 struct avl_tree obj_types;
18 struct avl_tree objects;
21 static void ubus_unref_object_type(struct ubus_object_type *type)
23 struct ubus_method *m;
25 if (--type->refcount > 0)
28 while (!list_empty(&type->methods)) {
29 m = list_first_entry(&type->methods, struct ubus_method, list);
34 ubus_free_id(&obj_types, &type->id);
38 static bool ubus_create_obj_method(struct ubus_object_type *type, struct blob_attr *attr)
40 struct ubus_method *m;
41 int bloblen = blob_raw_len(attr);
43 m = calloc(1, sizeof(*m) + bloblen);
47 list_add_tail(&m->list, &type->methods);
48 memcpy(m->data, attr, bloblen);
49 m->name = blobmsg_name(m->data);
54 static struct ubus_object_type *ubus_create_obj_type(struct blob_attr *sig)
56 struct ubus_object_type *type;
57 struct blob_attr *pos;
60 type = calloc(1, sizeof(*type));
66 if (!ubus_alloc_id(&obj_types, &type->id, 0))
69 INIT_LIST_HEAD(&type->methods);
71 blob_for_each_attr(pos, sig, rem) {
72 if (!blobmsg_check_attr(pos, true))
75 if (!ubus_create_obj_method(type, pos))
82 ubus_unref_object_type(type);
90 static struct ubus_object_type *ubus_get_obj_type(uint32_t obj_id)
92 struct ubus_object_type *type;
95 id = ubus_find_id(&obj_types, obj_id);
99 type = container_of(id, struct ubus_object_type, id);
104 struct ubus_object *ubusd_create_object_internal(struct ubus_object_type *type, uint32_t id)
106 struct ubus_object *obj;
108 obj = calloc(1, sizeof(*obj));
112 if (!ubus_alloc_id(&objects, &obj->id, id))
116 INIT_LIST_HEAD(&obj->list);
117 INIT_LIST_HEAD(&obj->events);
118 INIT_LIST_HEAD(&obj->subscribers);
119 INIT_LIST_HEAD(&obj->target_list);
130 struct ubus_object *ubusd_create_object(struct ubus_client *cl, struct blob_attr **attr)
132 struct ubus_object *obj;
133 struct ubus_object_type *type = NULL;
135 if (attr[UBUS_ATTR_OBJTYPE])
136 type = ubus_get_obj_type(blob_get_u32(attr[UBUS_ATTR_OBJTYPE]));
137 else if (attr[UBUS_ATTR_SIGNATURE])
138 type = ubus_create_obj_type(attr[UBUS_ATTR_SIGNATURE]);
140 obj = ubusd_create_object_internal(type, 0);
142 ubus_unref_object_type(type);
147 if (attr[UBUS_ATTR_OBJPATH]) {
148 obj->path.key = strdup(blob_data(attr[UBUS_ATTR_OBJPATH]));
152 if (avl_insert(&path, &obj->path) != 0) {
153 free((void *) obj->path.key);
154 obj->path.key = NULL;
157 ubusd_send_obj_event(obj, true);
161 list_add(&obj->list, &cl->objects);
166 ubusd_free_object(obj);
170 void ubus_subscribe(struct ubus_object *obj, struct ubus_object *target)
172 struct ubus_subscription *s;
173 bool first = list_empty(&target->subscribers);
175 s = calloc(1, sizeof(*s));
181 list_add(&s->list, &target->subscribers);
182 list_add(&s->target_list, &obj->target_list);
185 ubus_notify_subscription(target);
188 void ubus_unsubscribe(struct ubus_subscription *s)
190 struct ubus_object *obj = s->target;
193 list_del(&s->target_list);
196 if (list_empty(&obj->subscribers))
197 ubus_notify_subscription(obj);
200 void ubusd_free_object(struct ubus_object *obj)
202 struct ubus_subscription *s, *tmp;
204 list_for_each_entry_safe(s, tmp, &obj->target_list, target_list) {
207 list_for_each_entry_safe(s, tmp, &obj->subscribers, list) {
208 ubus_notify_unsubscribe(s);
211 ubusd_event_cleanup_object(obj);
213 ubusd_send_obj_event(obj, false);
214 avl_delete(&path, &obj->path);
215 free((void *) obj->path.key);
217 if (!list_empty(&obj->list))
218 list_del(&obj->list);
219 ubus_free_id(&objects, &obj->id);
221 ubus_unref_object_type(obj->type);
225 static void __constructor ubusd_obj_init(void)
227 ubus_init_id_tree(&objects);
228 ubus_init_id_tree(&obj_types);
229 ubus_init_string_tree(&path, false);