7 #include <sys/socket.h>
8 #include <net/ethernet.h>
11 #include <netinet/ether.h>
18 static struct avl_tree devices;
19 static struct avl_tree aliases;
24 struct device_user dep;
29 static const struct device_type alias_device_type;
31 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
32 [DEV_ATTR_TYPE] = { "type", BLOBMSG_TYPE_STRING },
33 [DEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
34 [DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
35 [DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
36 [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
39 const struct config_param_list device_attr_list = {
40 .n_params = __DEV_ATTR_MAX,
44 static struct device *
45 simple_device_create(const char *name, struct blob_attr *attr)
47 struct blob_attr *tb[__DEV_ATTR_MAX];
48 struct device *dev = NULL;
50 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
51 dev = device_get(name, true);
55 device_init_settings(dev, tb);
60 static void simple_device_free(struct device *dev)
66 const struct device_type simple_device_type = {
67 .name = "Network device",
68 .config_params = &device_attr_list,
70 .create = simple_device_create,
71 .check_state = system_if_check,
72 .free = simple_device_free,
76 alias_device_set_state(struct device *dev, bool state)
78 struct alias_device *alias;
80 alias = container_of(dev, struct alias_device, dev);
85 return device_claim(&alias->dep);
87 device_release(&alias->dep);
89 device_remove_user(&alias->dep);
93 static struct device *
94 alias_device_create(const char *name, struct blob_attr *attr)
96 struct alias_device *alias;
98 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
99 strcpy(alias->name, name);
100 alias->dev.set_state = alias_device_set_state;
101 device_init_virtual(&alias->dev, &alias_device_type, NULL);
102 alias->avl.key = alias->name;
103 avl_insert(&aliases, &alias->avl);
108 static void alias_device_free(struct device *dev)
110 struct alias_device *alias;
114 alias = container_of(dev, struct alias_device, dev);
115 avl_delete(&aliases, &alias->avl);
119 static const struct device_type alias_device_type = {
120 .name = "Network alias",
121 .create = alias_device_create,
122 .free = alias_device_free,
126 device_init_settings(struct device *dev, struct blob_attr **tb)
128 struct blob_attr *cur;
129 struct ether_addr *ea;
133 if ((cur = tb[DEV_ATTR_MTU])) {
134 dev->mtu = blobmsg_get_u32(cur);
135 dev->flags |= DEV_OPT_MTU;
138 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
139 dev->txqueuelen = blobmsg_get_u32(cur);
140 dev->flags |= DEV_OPT_TXQUEUELEN;
143 if ((cur = tb[DEV_ATTR_MACADDR])) {
144 ea = ether_aton(blob_data(cur));
146 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
147 dev->flags |= DEV_OPT_MACADDR;
152 static void __init dev_init(void)
154 avl_init(&devices, avl_strcmp, true, NULL);
155 avl_init(&aliases, avl_strcmp, false, NULL);
158 static void device_broadcast_event(struct device *dev, enum device_event ev)
160 struct device_user *dep, *tmp;
162 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
171 alias_notify_device(const char *name, struct device *dev)
173 struct alias_device *alias;
175 alias = avl_find_element(&aliases, name, alias, avl);
179 alias->cleanup = !dev;
181 if (dev != alias->dep.dev) {
183 device_remove_user(&alias->dep);
184 strcpy(alias->dev.ifname, dev->ifname);
185 device_add_user(&alias->dep, dev);
189 device_set_present(&alias->dev, !!dev);
191 if (!dev && alias->dep.dev && !alias->dep.dev->active)
192 device_remove_user(&alias->dep);
195 static int set_device_state(struct device *dev, bool state)
205 int device_claim(struct device_user *dep)
207 struct device *dev = dep->dev;
214 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
215 if (++dev->active != 1)
218 device_broadcast_event(dev, DEV_EVENT_SETUP);
219 ret = dev->set_state(dev, true);
221 device_broadcast_event(dev, DEV_EVENT_UP);
223 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
225 dep->claimed = false;
231 void device_release(struct device_user *dep)
233 struct device *dev = dep->dev;
238 dep->claimed = false;
240 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
241 assert(dev->active >= 0);
246 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
247 dev->set_state(dev, false);
248 device_broadcast_event(dev, DEV_EVENT_DOWN);
251 int device_check_state(struct device *dev)
253 if (!dev->type->check_state)
256 return dev->type->check_state(dev);
259 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
265 strncpy(dev->ifname, name, IFNAMSIZ);
267 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
268 INIT_LIST_HEAD(&dev->users);
272 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
276 device_init_virtual(dev, type, ifname);
279 dev->set_state = set_device_state;
281 dev->avl.key = dev->ifname;
283 ret = avl_insert(&devices, &dev->avl);
287 system_if_clear_state(dev);
288 device_check_state(dev);
293 static struct device *
294 device_create_default(const char *name)
298 D(DEVICE, "Create simple device '%s'\n", name);
299 dev = calloc(1, sizeof(*dev));
300 device_init(dev, &simple_device_type, name);
301 dev->default_config = true;
305 static struct device *
306 device_alias_get(const char *name)
308 struct alias_device *alias;
310 alias = avl_find_element(&aliases, name, alias, avl);
314 return alias_device_create(name, NULL);
318 device_get(const char *name, bool create)
322 if (strchr(name, '.'))
323 return get_vlan_device_chain(name, create);
326 return device_alias_get(name + 1);
328 dev = avl_find_element(&devices, name, dev, avl);
335 return device_create_default(name);
339 device_delete(struct device *dev)
344 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
345 avl_delete(&devices, &dev->avl);
349 void device_cleanup(struct device *dev)
351 struct device_user *dep, *tmp;
353 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
354 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
358 dep->cb(dep, DEV_EVENT_REMOVE);
365 void device_set_present(struct device *dev, bool state)
367 if (dev->present == state)
370 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
371 dev->present = state;
372 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
375 void device_add_user(struct device_user *dep, struct device *dev)
378 list_add_tail(&dep->list, &dev->users);
379 if (dep->cb && dev->present) {
380 dep->cb(dep, DEV_EVENT_ADD);
382 dep->cb(dep, DEV_EVENT_UP);
387 __device_free_unused(struct device *dev)
389 if (!list_empty(&dev->users) || dev->current_config || config_init)
395 void device_remove_user(struct device_user *dep)
397 struct device *dev = dep->dev;
402 list_del(&dep->list);
404 __device_free_unused(dev);
408 device_free_unused(struct device *dev)
413 return __device_free_unused(dev);
415 avl_for_each_element_safe(&devices, dev, avl, tmp)
416 __device_free_unused(dev);
420 device_init_pending(void)
422 struct device *dev, *tmp;
424 avl_for_each_element_safe(&devices, dev, avl, tmp) {
425 if (!dev->config_pending)
428 dev->type->config_init(dev);
429 dev->config_pending = false;
434 device_reload_config(struct device *dev, struct blob_attr *attr)
436 struct blob_attr *tb[__DEV_ATTR_MAX];
437 const struct config_param_list *cfg = dev->type->config_params;
439 if (config_check_equal(dev->config, attr, cfg))
440 return DEV_CONFIG_NO_CHANGE;
442 if (cfg == &device_attr_list) {
443 memset(tb, 0, sizeof(tb));
446 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
447 blob_data(attr), blob_len(attr));
449 device_init_settings(dev, tb);
450 return DEV_CONFIG_APPLIED;
452 return DEV_CONFIG_RECREATE;
455 static enum dev_change_type
456 device_check_config(struct device *dev, const struct device_type *type,
457 struct blob_attr *attr)
459 if (type != dev->type)
460 return DEV_CONFIG_RECREATE;
462 if (dev->type->reload)
463 return dev->type->reload(dev, attr);
465 return device_reload_config(dev, attr);
469 device_replace(struct device *dev, struct device *odev)
471 struct device_user *dep, *tmp;
472 bool present = odev->present;
475 device_set_present(odev, false);
477 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
479 list_move_tail(&dep->list, &dev->users);
485 device_set_present(dev, true);
489 device_reset_config(void)
493 avl_for_each_element(&devices, dev, avl)
494 dev->current_config = false;
498 device_reset_old(void)
500 struct device *dev, *tmp, *ndev;
502 avl_for_each_element_safe(&devices, dev, avl, tmp) {
503 if (dev->current_config || dev->default_config)
506 if (dev->type != &simple_device_type)
509 ndev = device_create_default(dev->ifname);
510 device_replace(ndev, dev);
515 device_create(const char *name, const struct device_type *type,
516 struct blob_attr *config)
518 struct device *odev = NULL, *dev;
519 enum dev_change_type change;
521 config = config_memdup(config);
525 odev = device_get(name, false);
527 odev->current_config = true;
528 change = device_check_config(odev, type, config);
530 case DEV_CONFIG_APPLIED:
531 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
533 odev->config = config;
535 device_set_present(odev, false);
536 device_set_present(odev, true);
539 case DEV_CONFIG_NO_CHANGE:
540 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
543 case DEV_CONFIG_RECREATE:
544 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
549 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
551 dev = type->create(name, config);
555 dev->current_config = true;
556 dev->config = config;
558 device_replace(dev, odev);
560 if (!config_init && dev->config_pending)
561 type->config_init(dev);
567 device_dump_status(struct blob_buf *b, struct device *dev)
572 avl_for_each_element(&devices, dev, avl) {
575 c = blobmsg_open_table(b, dev->ifname);
576 device_dump_status(b, dev);
577 blobmsg_close_table(b, c);
586 blobmsg_add_string(b, "type", dev->type->name);
587 blobmsg_add_u8(b, "up", !!dev->active);
588 if (dev->type->dump_info)
589 dev->type->dump_info(dev, b);
591 s = blobmsg_open_table(b, "statistics");
592 if (dev->type->dump_stats)
593 dev->type->dump_stats(dev, b);
595 system_if_dump_stats(dev, b);
596 blobmsg_close_table(b, s);