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)
73 if (state && !dev->parent.dev)
74 dev->parent.dev = system_if_get_parent(dev);
76 if (dev->parent.dev) {
78 ret = device_claim(&dev->parent);
80 device_release(&dev->parent);
85 return set_device_state(dev, state);
88 static struct device *
89 simple_device_create(const char *name, struct blob_attr *attr)
91 struct blob_attr *tb[__DEV_ATTR_MAX];
92 struct device *dev = NULL;
94 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
95 dev = device_get(name, true);
99 dev->set_state = simple_device_set_state;
100 device_init_settings(dev, tb);
105 static void simple_device_free(struct device *dev)
108 device_remove_user(&dev->parent);
113 const struct device_type simple_device_type = {
114 .name = "Network device",
115 .config_params = &device_attr_list,
117 .create = simple_device_create,
118 .check_state = system_if_check,
119 .free = simple_device_free,
123 alias_device_set_state(struct device *dev, bool state)
125 struct alias_device *alias;
127 alias = container_of(dev, struct alias_device, dev);
132 return device_claim(&alias->dep);
134 device_release(&alias->dep);
136 device_remove_user(&alias->dep);
140 static struct device *
141 alias_device_create(const char *name, struct blob_attr *attr)
143 struct alias_device *alias;
145 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
146 strcpy(alias->name, name);
147 alias->dev.set_state = alias_device_set_state;
148 device_init_virtual(&alias->dev, &alias_device_type, NULL);
149 alias->avl.key = alias->name;
150 avl_insert(&aliases, &alias->avl);
155 static void alias_device_free(struct device *dev)
157 struct alias_device *alias;
161 alias = container_of(dev, struct alias_device, dev);
162 avl_delete(&aliases, &alias->avl);
166 static const struct device_type alias_device_type = {
167 .name = "Network alias",
168 .create = alias_device_create,
169 .free = alias_device_free,
173 device_init_settings(struct device *dev, struct blob_attr **tb)
175 struct blob_attr *cur;
176 struct ether_addr *ea;
180 if ((cur = tb[DEV_ATTR_MTU])) {
181 dev->mtu = blobmsg_get_u32(cur);
182 dev->flags |= DEV_OPT_MTU;
185 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
186 dev->txqueuelen = blobmsg_get_u32(cur);
187 dev->flags |= DEV_OPT_TXQUEUELEN;
190 if ((cur = tb[DEV_ATTR_MACADDR])) {
191 ea = ether_aton(blob_data(cur));
193 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
194 dev->flags |= DEV_OPT_MACADDR;
199 static void __init dev_init(void)
201 avl_init(&devices, avl_strcmp, true, NULL);
202 avl_init(&aliases, avl_strcmp, false, NULL);
205 static void device_broadcast_event(struct device *dev, enum device_event ev)
207 struct device_user *dep, *tmp;
209 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
218 alias_notify_device(const char *name, struct device *dev)
220 struct alias_device *alias;
224 alias = avl_find_element(&aliases, name, alias, avl);
228 alias->cleanup = !dev;
230 if (dev != alias->dep.dev) {
231 device_remove_user(&alias->dep);
232 strcpy(alias->dev.ifname, dev->ifname);
233 device_add_user(&alias->dep, dev);
237 device_set_present(&alias->dev, !!dev);
239 if (!dev && alias->dep.dev && !alias->dep.dev->active)
240 device_remove_user(&alias->dep);
245 int device_claim(struct device_user *dep)
247 struct device *dev = dep->dev;
254 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
255 if (++dev->active != 1)
258 device_broadcast_event(dev, DEV_EVENT_SETUP);
259 ret = dev->set_state(dev, true);
261 device_broadcast_event(dev, DEV_EVENT_UP);
263 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
265 dep->claimed = false;
271 void device_release(struct device_user *dep)
273 struct device *dev = dep->dev;
278 dep->claimed = false;
280 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
281 assert(dev->active >= 0);
286 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
287 dev->set_state(dev, false);
288 device_broadcast_event(dev, DEV_EVENT_DOWN);
291 int device_check_state(struct device *dev)
293 if (!dev->type->check_state)
296 return dev->type->check_state(dev);
299 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
305 strncpy(dev->ifname, name, IFNAMSIZ);
307 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
308 INIT_LIST_HEAD(&dev->users);
312 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
316 device_init_virtual(dev, type, ifname);
319 dev->set_state = set_device_state;
321 dev->avl.key = dev->ifname;
323 ret = avl_insert(&devices, &dev->avl);
327 system_if_clear_state(dev);
328 device_check_state(dev);
333 static struct device *
334 device_create_default(const char *name, bool external)
338 D(DEVICE, "Create simple device '%s'\n", name);
339 dev = calloc(1, sizeof(*dev));
340 dev->external = external;
341 dev->set_state = simple_device_set_state;
342 device_init(dev, &simple_device_type, name);
343 dev->default_config = true;
347 static struct device *
348 device_alias_get(const char *name)
350 struct alias_device *alias;
352 alias = avl_find_element(&aliases, name, alias, avl);
356 return alias_device_create(name, NULL);
360 device_get(const char *name, int create)
364 if (strchr(name, '.'))
365 return get_vlan_device_chain(name, create);
368 return device_alias_get(name + 1);
370 dev = avl_find_element(&devices, name, dev, avl);
377 return device_create_default(name, create > 1);
381 device_delete(struct device *dev)
386 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
387 avl_delete(&devices, &dev->avl);
391 void device_cleanup(struct device *dev)
393 struct device_user *dep, *tmp;
395 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
396 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
400 dep->cb(dep, DEV_EVENT_REMOVE);
407 void device_set_present(struct device *dev, bool state)
409 if (dev->present == state)
412 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
413 dev->present = state;
414 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
417 void device_add_user(struct device_user *dep, struct device *dev)
420 list_add_tail(&dep->list, &dev->users);
421 if (dep->cb && dev->present) {
422 dep->cb(dep, DEV_EVENT_ADD);
424 dep->cb(dep, DEV_EVENT_UP);
429 __device_free_unused(struct device *dev)
431 if (!list_empty(&dev->users) || dev->current_config || __devlock)
437 void device_remove_user(struct device_user *dep)
439 struct device *dev = dep->dev;
444 dep->hotplug = false;
448 list_del(&dep->list);
450 __device_free_unused(dev);
454 device_free_unused(struct device *dev)
459 return __device_free_unused(dev);
461 avl_for_each_element_safe(&devices, dev, avl, tmp)
462 __device_free_unused(dev);
466 device_init_pending(void)
468 struct device *dev, *tmp;
470 avl_for_each_element_safe(&devices, dev, avl, tmp) {
471 if (!dev->config_pending)
474 dev->type->config_init(dev);
475 dev->config_pending = false;
479 static enum dev_change_type
480 device_reload_config(struct device *dev, struct blob_attr *attr)
482 struct blob_attr *tb[__DEV_ATTR_MAX];
483 const struct config_param_list *cfg = dev->type->config_params;
485 if (config_check_equal(dev->config, attr, cfg))
486 return DEV_CONFIG_NO_CHANGE;
488 if (cfg == &device_attr_list) {
489 memset(tb, 0, sizeof(tb));
492 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
493 blob_data(attr), blob_len(attr));
495 device_init_settings(dev, tb);
496 return DEV_CONFIG_APPLIED;
498 return DEV_CONFIG_RECREATE;
502 device_set_config(struct device *dev, const struct device_type *type,
503 struct blob_attr *attr)
505 if (type != dev->type)
506 return DEV_CONFIG_RECREATE;
508 if (dev->type->reload)
509 return dev->type->reload(dev, attr);
511 return device_reload_config(dev, attr);
515 device_replace(struct device *dev, struct device *odev)
517 struct device_user *dep, *tmp;
518 bool present = odev->present;
521 device_set_present(odev, false);
523 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
525 list_move_tail(&dep->list, &dev->users);
531 device_set_present(dev, true);
535 device_reset_config(void)
539 avl_for_each_element(&devices, dev, avl)
540 dev->current_config = false;
544 device_reset_old(void)
546 struct device *dev, *tmp, *ndev;
548 avl_for_each_element_safe(&devices, dev, avl, tmp) {
549 if (dev->current_config || dev->default_config)
552 if (dev->type != &simple_device_type)
555 ndev = device_create_default(dev->ifname, dev->external);
556 device_replace(ndev, dev);
561 device_create(const char *name, const struct device_type *type,
562 struct blob_attr *config)
564 struct device *odev = NULL, *dev;
565 enum dev_change_type change;
567 config = config_memdup(config);
571 odev = device_get(name, false);
573 odev->current_config = true;
574 change = device_set_config(odev, type, config);
576 case DEV_CONFIG_APPLIED:
577 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
579 odev->config = config;
581 device_set_present(odev, false);
582 device_set_present(odev, true);
585 case DEV_CONFIG_NO_CHANGE:
586 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
589 case DEV_CONFIG_RECREATE:
590 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
595 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
597 dev = type->create(name, config);
601 dev->current_config = true;
602 dev->config = config;
604 device_replace(dev, odev);
606 if (!config_init && dev->config_pending)
607 type->config_init(dev);
613 device_dump_status(struct blob_buf *b, struct device *dev)
618 avl_for_each_element(&devices, dev, avl) {
621 c = blobmsg_open_table(b, dev->ifname);
622 device_dump_status(b, dev);
623 blobmsg_close_table(b, c);
632 blobmsg_add_string(b, "type", dev->type->name);
633 blobmsg_add_u8(b, "up", !!dev->active);
634 if (dev->type->dump_info)
635 dev->type->dump_info(dev, b);
637 s = blobmsg_open_table(b, "statistics");
638 if (dev->type->dump_stats)
639 dev->type->dump_stats(dev, b);
641 system_if_dump_stats(dev, b);
642 blobmsg_close_table(b, s);