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 int __devlock = 0;
46 void device_lock(void)
51 void device_unlock(void)
55 device_free_unused(NULL);
58 static int set_device_state(struct device *dev, bool state)
69 simple_device_set_state(struct device *dev, bool state)
74 pdev = dev->parent.dev;
76 pdev = system_if_get_parent(dev);
78 device_add_user(&dev->parent, pdev);
83 ret = device_claim(&dev->parent);
85 device_release(&dev->parent);
90 return set_device_state(dev, state);
93 static struct device *
94 simple_device_create(const char *name, struct blob_attr *attr)
96 struct blob_attr *tb[__DEV_ATTR_MAX];
97 struct device *dev = NULL;
99 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
100 dev = device_get(name, true);
104 dev->set_state = simple_device_set_state;
105 device_init_settings(dev, tb);
110 static void simple_device_free(struct device *dev)
113 device_remove_user(&dev->parent);
118 const struct device_type simple_device_type = {
119 .name = "Network device",
120 .config_params = &device_attr_list,
122 .create = simple_device_create,
123 .check_state = system_if_check,
124 .free = simple_device_free,
128 alias_device_set_state(struct device *dev, bool state)
130 struct alias_device *alias;
132 alias = container_of(dev, struct alias_device, dev);
137 return device_claim(&alias->dep);
139 device_release(&alias->dep);
141 device_remove_user(&alias->dep);
145 static struct device *
146 alias_device_create(const char *name, struct blob_attr *attr)
148 struct alias_device *alias;
150 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
151 strcpy(alias->name, name);
152 alias->dev.set_state = alias_device_set_state;
153 device_init_virtual(&alias->dev, &alias_device_type, NULL);
154 alias->avl.key = alias->name;
155 avl_insert(&aliases, &alias->avl);
160 static void alias_device_free(struct device *dev)
162 struct alias_device *alias;
166 alias = container_of(dev, struct alias_device, dev);
167 avl_delete(&aliases, &alias->avl);
171 static const struct device_type alias_device_type = {
172 .name = "Network alias",
173 .create = alias_device_create,
174 .free = alias_device_free,
178 device_init_settings(struct device *dev, struct blob_attr **tb)
180 struct blob_attr *cur;
181 struct ether_addr *ea;
185 if ((cur = tb[DEV_ATTR_MTU])) {
186 dev->mtu = blobmsg_get_u32(cur);
187 dev->flags |= DEV_OPT_MTU;
190 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
191 dev->txqueuelen = blobmsg_get_u32(cur);
192 dev->flags |= DEV_OPT_TXQUEUELEN;
195 if ((cur = tb[DEV_ATTR_MACADDR])) {
196 ea = ether_aton(blob_data(cur));
198 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
199 dev->flags |= DEV_OPT_MACADDR;
204 static void __init dev_init(void)
206 avl_init(&devices, avl_strcmp, true, NULL);
207 avl_init(&aliases, avl_strcmp, false, NULL);
210 static void device_broadcast_event(struct device *dev, enum device_event ev)
212 struct device_user *dep, *tmp;
214 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
223 alias_notify_device(const char *name, struct device *dev)
225 struct alias_device *alias;
229 alias = avl_find_element(&aliases, name, alias, avl);
233 alias->cleanup = !dev;
235 if (dev != alias->dep.dev) {
236 device_remove_user(&alias->dep);
237 strcpy(alias->dev.ifname, dev->ifname);
238 device_add_user(&alias->dep, dev);
242 device_set_present(&alias->dev, !!dev);
244 if (!dev && alias->dep.dev && !alias->dep.dev->active)
245 device_remove_user(&alias->dep);
250 int device_claim(struct device_user *dep)
252 struct device *dev = dep->dev;
259 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
260 if (++dev->active != 1)
263 device_broadcast_event(dev, DEV_EVENT_SETUP);
264 ret = dev->set_state(dev, true);
266 device_broadcast_event(dev, DEV_EVENT_UP);
268 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
270 dep->claimed = false;
276 void device_release(struct device_user *dep)
278 struct device *dev = dep->dev;
283 dep->claimed = false;
285 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
286 assert(dev->active >= 0);
291 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
292 dev->set_state(dev, false);
293 device_broadcast_event(dev, DEV_EVENT_DOWN);
296 int device_check_state(struct device *dev)
298 if (!dev->type->check_state)
301 return dev->type->check_state(dev);
304 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
310 strncpy(dev->ifname, name, IFNAMSIZ);
312 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
313 INIT_LIST_HEAD(&dev->users);
317 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
321 device_init_virtual(dev, type, ifname);
324 dev->set_state = set_device_state;
326 dev->avl.key = dev->ifname;
328 ret = avl_insert(&devices, &dev->avl);
332 system_if_clear_state(dev);
333 device_check_state(dev);
338 static struct device *
339 device_create_default(const char *name, bool external)
343 D(DEVICE, "Create simple device '%s'\n", name);
344 dev = calloc(1, sizeof(*dev));
345 dev->external = external;
346 dev->set_state = simple_device_set_state;
347 device_init(dev, &simple_device_type, name);
348 dev->default_config = true;
352 static struct device *
353 device_alias_get(const char *name)
355 struct alias_device *alias;
357 alias = avl_find_element(&aliases, name, alias, avl);
361 return alias_device_create(name, NULL);
365 device_get(const char *name, int create)
369 if (strchr(name, '.'))
370 return get_vlan_device_chain(name, create);
373 return device_alias_get(name + 1);
375 dev = avl_find_element(&devices, name, dev, avl);
382 return device_create_default(name, create > 1);
386 device_delete(struct device *dev)
391 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
392 avl_delete(&devices, &dev->avl);
396 void device_cleanup(struct device *dev)
398 struct device_user *dep, *tmp;
400 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
401 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
405 dep->cb(dep, DEV_EVENT_REMOVE);
412 void device_set_present(struct device *dev, bool state)
414 if (dev->present == state)
417 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
418 dev->present = state;
419 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
422 void device_add_user(struct device_user *dep, struct device *dev)
425 list_add_tail(&dep->list, &dev->users);
426 if (dep->cb && dev->present) {
427 dep->cb(dep, DEV_EVENT_ADD);
429 dep->cb(dep, DEV_EVENT_UP);
434 device_free(struct device *dev)
437 dev->type->free(dev);
442 __device_free_unused(struct device *dev)
444 if (!list_empty(&dev->users) || dev->current_config || __devlock)
450 void device_remove_user(struct device_user *dep)
452 struct device *dev = dep->dev;
457 dep->hotplug = false;
461 list_del(&dep->list);
463 __device_free_unused(dev);
467 device_free_unused(struct device *dev)
472 return __device_free_unused(dev);
474 avl_for_each_element_safe(&devices, dev, avl, tmp)
475 __device_free_unused(dev);
479 device_init_pending(void)
481 struct device *dev, *tmp;
483 avl_for_each_element_safe(&devices, dev, avl, tmp) {
484 if (!dev->config_pending)
487 dev->type->config_init(dev);
488 dev->config_pending = false;
492 static enum dev_change_type
493 device_reload_config(struct device *dev, struct blob_attr *attr)
495 struct blob_attr *tb[__DEV_ATTR_MAX];
496 const struct config_param_list *cfg = dev->type->config_params;
498 if (config_check_equal(dev->config, attr, cfg))
499 return DEV_CONFIG_NO_CHANGE;
501 if (cfg == &device_attr_list) {
502 memset(tb, 0, sizeof(tb));
505 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
506 blob_data(attr), blob_len(attr));
508 device_init_settings(dev, tb);
509 return DEV_CONFIG_APPLIED;
511 return DEV_CONFIG_RECREATE;
515 device_set_config(struct device *dev, const struct device_type *type,
516 struct blob_attr *attr)
518 if (type != dev->type)
519 return DEV_CONFIG_RECREATE;
521 if (dev->type->reload)
522 return dev->type->reload(dev, attr);
524 return device_reload_config(dev, attr);
528 device_replace(struct device *dev, struct device *odev)
530 struct device_user *dep, *tmp;
531 bool present = odev->present;
534 device_set_present(odev, false);
536 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
538 list_move_tail(&dep->list, &dev->users);
544 device_set_present(dev, true);
548 device_reset_config(void)
552 avl_for_each_element(&devices, dev, avl)
553 dev->current_config = false;
557 device_reset_old(void)
559 struct device *dev, *tmp, *ndev;
561 avl_for_each_element_safe(&devices, dev, avl, tmp) {
562 if (dev->current_config || dev->default_config)
565 if (dev->type != &simple_device_type)
568 ndev = device_create_default(dev->ifname, dev->external);
569 device_replace(ndev, dev);
574 device_create(const char *name, const struct device_type *type,
575 struct blob_attr *config)
577 struct device *odev = NULL, *dev;
578 enum dev_change_type change;
580 config = config_memdup(config);
584 odev = device_get(name, false);
586 odev->current_config = true;
587 change = device_set_config(odev, type, config);
589 case DEV_CONFIG_APPLIED:
590 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
592 odev->config = config;
594 device_set_present(odev, false);
595 device_set_present(odev, true);
598 case DEV_CONFIG_NO_CHANGE:
599 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
602 case DEV_CONFIG_RECREATE:
603 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
608 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
610 dev = type->create(name, config);
614 dev->current_config = true;
615 dev->config = config;
617 device_replace(dev, odev);
619 if (!config_init && dev->config_pending)
620 type->config_init(dev);
626 device_dump_status(struct blob_buf *b, struct device *dev)
631 avl_for_each_element(&devices, dev, avl) {
634 c = blobmsg_open_table(b, dev->ifname);
635 device_dump_status(b, dev);
636 blobmsg_close_table(b, c);
645 blobmsg_add_string(b, "type", dev->type->name);
646 blobmsg_add_u8(b, "up", !!dev->active);
647 if (dev->type->dump_info)
648 dev->type->dump_info(dev, b);
650 s = blobmsg_open_table(b, "statistics");
651 if (dev->type->dump_stats)
652 dev->type->dump_stats(dev, b);
654 system_if_dump_stats(dev, b);
655 blobmsg_close_table(b, s);