7 #include <sys/socket.h>
8 #include <net/ethernet.h>
11 #include <netinet/ether.h>
18 static struct avl_tree devices;
20 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
21 [DEV_ATTR_TYPE] = { "type", BLOBMSG_TYPE_STRING },
22 [DEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
23 [DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
24 [DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
25 [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
28 const struct config_param_list device_attr_list = {
29 .n_params = __DEV_ATTR_MAX,
33 static struct device *
34 simple_device_create(const char *name, struct blob_attr *attr)
36 struct blob_attr *tb[__DEV_ATTR_MAX];
37 struct device *dev = NULL;
39 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
40 dev = device_get(name, true);
44 device_init_settings(dev, tb);
49 static void simple_device_free(struct device *dev)
55 const struct device_type simple_device_type = {
56 .name = "Network device",
57 .config_params = &device_attr_list,
59 .create = simple_device_create,
60 .check_state = system_if_check,
61 .free = simple_device_free,
65 device_init_settings(struct device *dev, struct blob_attr **tb)
67 struct blob_attr *cur;
68 struct ether_addr *ea;
72 if ((cur = tb[DEV_ATTR_MTU])) {
73 dev->mtu = blobmsg_get_u32(cur);
74 dev->flags |= DEV_OPT_MTU;
77 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
78 dev->txqueuelen = blobmsg_get_u32(cur);
79 dev->flags |= DEV_OPT_TXQUEUELEN;
82 if ((cur = tb[DEV_ATTR_MACADDR])) {
83 ea = ether_aton(blob_data(cur));
85 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
86 dev->flags |= DEV_OPT_MACADDR;
91 static void __init dev_init(void)
93 avl_init(&devices, avl_strcmp, true, NULL);
96 static void device_broadcast_event(struct device *dev, enum device_event ev)
98 struct device_user *dep, *tmp;
100 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
108 static int set_device_state(struct device *dev, bool state)
118 int device_claim(struct device_user *dep)
120 struct device *dev = dep->dev;
127 D(DEVICE, "claim device %s, new refcount: %d\n", dev->ifname, dev->active + 1);
128 if (++dev->active != 1)
131 device_broadcast_event(dev, DEV_EVENT_SETUP);
132 ret = dev->set_state(dev, true);
134 device_broadcast_event(dev, DEV_EVENT_UP);
136 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
138 dep->claimed = false;
144 void device_release(struct device_user *dep)
146 struct device *dev = dep->dev;
151 dep->claimed = false;
153 D(DEVICE, "release device %s, new refcount: %d\n", dev->ifname, dev->active);
154 assert(dev->active >= 0);
159 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
160 dev->set_state(dev, false);
161 device_broadcast_event(dev, DEV_EVENT_DOWN);
164 int device_check_state(struct device *dev)
166 if (!dev->type->check_state)
169 return dev->type->check_state(dev);
172 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
178 strncpy(dev->ifname, name, IFNAMSIZ);
180 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
181 INIT_LIST_HEAD(&dev->users);
185 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
189 device_init_virtual(dev, type, ifname);
192 dev->set_state = set_device_state;
194 dev->avl.key = dev->ifname;
196 ret = avl_insert(&devices, &dev->avl);
200 system_if_clear_state(dev);
201 device_check_state(dev);
206 static struct device *
207 device_create_default(const char *name)
211 D(DEVICE, "Create simple device '%s'\n", name);
212 dev = calloc(1, sizeof(*dev));
213 device_init(dev, &simple_device_type, name);
214 dev->default_config = true;
219 device_get(const char *name, bool create)
223 if (strchr(name, '.'))
224 return get_vlan_device_chain(name, create);
226 dev = avl_find_element(&devices, name, dev, avl);
233 return device_create_default(name);
237 device_delete(struct device *dev)
242 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
243 avl_delete(&devices, &dev->avl);
247 void device_cleanup(struct device *dev)
249 struct device_user *dep, *tmp;
251 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
252 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
256 dep->cb(dep, DEV_EVENT_REMOVE);
263 void device_set_present(struct device *dev, bool state)
265 if (dev->present == state)
268 D(DEVICE, "Device '%s' %s present\n", dev->ifname, state ? "is now" : "is no longer" );
269 dev->present = state;
270 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
273 void device_add_user(struct device_user *dep, struct device *dev)
276 list_add_tail(&dep->list, &dev->users);
277 if (dep->cb && dev->present) {
278 dep->cb(dep, DEV_EVENT_ADD);
280 dep->cb(dep, DEV_EVENT_UP);
285 __device_free_unused(struct device *dev)
287 if (!list_empty(&dev->users) || dev->current_config || config_init)
293 void device_remove_user(struct device_user *dep)
295 struct device *dev = dep->dev;
300 list_del(&dep->list);
302 __device_free_unused(dev);
306 device_free_unused(struct device *dev)
311 return __device_free_unused(dev);
313 avl_for_each_element_safe(&devices, dev, avl, tmp)
314 __device_free_unused(dev);
318 device_init_pending(void)
320 struct device *dev, *tmp;
322 avl_for_each_element_safe(&devices, dev, avl, tmp) {
323 if (!dev->config_pending)
326 dev->type->config_init(dev);
327 dev->config_pending = false;
332 device_reload_config(struct device *dev, struct blob_attr *attr)
334 struct blob_attr *tb[__DEV_ATTR_MAX];
335 const struct config_param_list *cfg = dev->type->config_params;
337 if (config_check_equal(dev->config, attr, cfg))
338 return DEV_CONFIG_NO_CHANGE;
340 if (cfg == &device_attr_list) {
341 memset(tb, 0, sizeof(tb));
344 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
345 blob_data(attr), blob_len(attr));
347 device_init_settings(dev, tb);
348 return DEV_CONFIG_APPLIED;
350 return DEV_CONFIG_RECREATE;
353 static enum dev_change_type
354 device_check_config(struct device *dev, const struct device_type *type,
355 struct blob_attr *attr)
357 if (type != dev->type)
358 return DEV_CONFIG_RECREATE;
360 if (dev->type->reload)
361 return dev->type->reload(dev, attr);
363 return device_reload_config(dev, attr);
367 device_replace(struct device *dev, struct device *odev)
369 struct device_user *dep, *tmp;
370 bool present = odev->present;
373 device_set_present(odev, false);
375 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
377 list_move_tail(&dep->list, &dev->users);
383 device_set_present(dev, true);
387 device_reset_config(void)
391 avl_for_each_element(&devices, dev, avl)
392 dev->current_config = false;
396 device_reset_old(void)
398 struct device *dev, *tmp, *ndev;
400 avl_for_each_element_safe(&devices, dev, avl, tmp) {
401 if (dev->current_config || dev->default_config)
404 if (dev->type != &simple_device_type)
407 ndev = device_create_default(dev->ifname);
408 device_replace(ndev, dev);
413 device_create(const char *name, const struct device_type *type,
414 struct blob_attr *config)
416 struct device *odev = NULL, *dev;
417 enum dev_change_type change;
419 config = config_memdup(config);
423 odev = device_get(name, false);
425 odev->current_config = true;
426 change = device_check_config(odev, type, config);
428 case DEV_CONFIG_APPLIED:
429 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
431 odev->config = config;
433 device_set_present(odev, false);
434 device_set_present(odev, true);
437 case DEV_CONFIG_NO_CHANGE:
438 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
441 case DEV_CONFIG_RECREATE:
442 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
447 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
449 dev = type->create(name, config);
453 dev->current_config = true;
454 dev->config = config;
456 device_replace(dev, odev);
458 if (!config_init && dev->config_pending)
459 type->config_init(dev);
465 device_dump_status(struct blob_buf *b, struct device *dev)
470 avl_for_each_element(&devices, dev, avl) {
473 c = blobmsg_open_table(b, dev->ifname);
474 device_dump_status(b, dev);
475 blobmsg_close_table(b, c);
484 blobmsg_add_string(b, "type", dev->type->name);
485 blobmsg_add_u8(b, "up", !!dev->active);
486 if (dev->type->dump_info)
487 dev->type->dump_info(dev, b);
489 s = blobmsg_open_table(b, "statistics");
490 if (dev->type->dump_stats)
491 dev->type->dump_stats(dev, b);
493 system_if_dump_stats(dev, b);
494 blobmsg_close_table(b, s);