6 #include <libubox/uapi.h>
11 static struct avl_tree devices;
13 static int avl_strcmp(const void *k1, const void *k2, void *ptr)
15 return strcmp(k1, k2);
18 static void API_CTOR dev_init(void)
20 avl_init(&devices, avl_strcmp, false, NULL);
23 static void free_device(struct device *dev)
29 static void broadcast_device_event(struct device *dev, enum device_event ev)
31 struct device_user *dep, *tmp;
33 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
41 static int set_device_state(struct device *dev, bool state)
44 broadcast_device_event(dev, DEV_EVENT_SETUP);
46 broadcast_device_event(dev, DEV_EVENT_UP);
48 broadcast_device_event(dev, DEV_EVENT_TEARDOWN);
50 broadcast_device_event(dev, DEV_EVENT_DOWN);
55 int claim_device(struct device *dev)
59 DPRINTF("claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
60 if (++dev->active != 1)
63 ret = dev->set_state(dev, true);
70 void release_device(struct device *dev)
73 DPRINTF("release device %s, new refcount: %d\n", dev->ifname, dev->active);
74 assert(dev->active >= 0);
77 dev->set_state(dev, false);
80 int check_device_state(struct device *dev)
82 if (!dev->type->check_state)
85 return dev->type->check_state(dev);
88 void init_virtual_device(struct device *dev, const struct device_type *type, const char *name)
93 fprintf(stderr, "Initialize interface '%s'\n", dev->ifname);
94 INIT_LIST_HEAD(&dev->users);
98 strncpy(dev->ifname, name, IFNAMSIZ);
101 int init_device(struct device *dev, const struct device_type *type, const char *ifname)
105 init_virtual_device(dev, type, ifname);
108 dev->set_state = set_device_state;
110 dev->avl.key = dev->ifname;
112 ret = avl_insert(&devices, &dev->avl);
116 check_device_state(dev);
121 struct device *get_device(const char *name, bool create)
123 static const struct device_type simple_type = {
125 .check_state = system_if_check,
131 if (strchr(name, '.'))
132 return get_vlan_device_chain(name, create);
134 dev = avl_find_element(&devices, name, dev, avl);
141 dev = calloc(1, sizeof(*dev));
142 init_device(dev, &simple_type, name);
147 void cleanup_device(struct device *dev)
149 struct device_user *dep, *tmp;
151 fprintf(stderr, "Clean up interface '%s'\n", dev->ifname);
152 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
156 dep->cb(dep, DEV_EVENT_REMOVE);
160 avl_delete(&devices, &dev->avl);
163 void set_device_present(struct device *dev, bool state)
165 if (dev->present == state)
168 DPRINTF("Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
169 dev->present = state;
170 broadcast_device_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
173 void add_device_user(struct device_user *dep, struct device *dev)
176 list_add(&dep->list, &dev->users);
177 if (dep->cb && dev->present) {
178 dep->cb(dep, DEV_EVENT_ADD);
180 dep->cb(dep, DEV_EVENT_UP);
184 void remove_device_user(struct device_user *dep)
186 struct device *dev = dep->dev;
188 list_del(&dep->list);
190 if (list_empty(&dev->users)) {
191 /* all references have gone away, remove this interface */
192 dev->type->free(dev);