9 static struct avl_tree devices;
11 static void __init dev_init(void)
13 avl_init(&devices, avl_strcmp, false, NULL);
16 static void free_simple_device(struct device *dev)
22 static void broadcast_device_event(struct device *dev, enum device_event ev)
24 struct device_user *dep, *tmp;
26 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
34 static int set_device_state(struct device *dev, bool state)
44 int claim_device(struct device *dev)
48 DPRINTF("claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
49 if (++dev->active != 1)
52 broadcast_device_event(dev, DEV_EVENT_SETUP);
53 ret = dev->set_state(dev, true);
55 broadcast_device_event(dev, DEV_EVENT_UP);
62 void release_device(struct device *dev)
65 DPRINTF("release device %s, new refcount: %d\n", dev->ifname, dev->active);
66 assert(dev->active >= 0);
71 broadcast_device_event(dev, DEV_EVENT_TEARDOWN);
72 dev->set_state(dev, false);
73 broadcast_device_event(dev, DEV_EVENT_DOWN);
76 int check_device_state(struct device *dev)
78 if (!dev->type->check_state)
81 return dev->type->check_state(dev);
84 void init_virtual_device(struct device *dev, const struct device_type *type, const char *name)
90 strncpy(dev->ifname, name, IFNAMSIZ);
92 fprintf(stderr, "Initialize device '%s'\n", dev->ifname);
93 INIT_LIST_HEAD(&dev->users);
97 int init_device(struct device *dev, const struct device_type *type, const char *ifname)
101 init_virtual_device(dev, type, ifname);
104 dev->set_state = set_device_state;
106 dev->avl.key = dev->ifname;
108 ret = avl_insert(&devices, &dev->avl);
112 check_device_state(dev);
117 struct device *get_device(const char *name, bool create)
119 static const struct device_type simple_type = {
121 .check_state = system_if_check,
122 .free = free_simple_device,
127 if (strchr(name, '.'))
128 return get_vlan_device_chain(name, create);
130 dev = avl_find_element(&devices, name, dev, avl);
137 dev = calloc(1, sizeof(*dev));
138 init_device(dev, &simple_type, name);
143 void cleanup_device(struct device *dev)
145 struct device_user *dep, *tmp;
147 fprintf(stderr, "Clean up device '%s'\n", dev->ifname);
148 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
152 dep->cb(dep, DEV_EVENT_REMOVE);
156 avl_delete(&devices, &dev->avl);
159 void set_device_present(struct device *dev, bool state)
161 if (dev->present == state)
164 DPRINTF("Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
165 dev->present = state;
166 broadcast_device_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
169 void add_device_user(struct device_user *dep, struct device *dev)
172 list_add(&dep->list, &dev->users);
173 if (dep->cb && dev->present) {
174 dep->cb(dep, DEV_EVENT_ADD);
176 dep->cb(dep, DEV_EVENT_UP);
180 void remove_device_user(struct device_user *dep)
182 struct device *dev = dep->dev;
184 list_del(&dep->list);
186 if (list_empty(&dev->users)) {
187 /* all references have gone away, remove this device */
195 cleanup_devices(void)
197 struct device *dev, *tmp;
199 avl_for_each_element_safe(&devices, dev, avl, tmp) {
200 if (!list_empty(&dev->users))