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 },
37 [DEV_ATTR_ENABLED] = { "enabled", BLOBMSG_TYPE_BOOL },
40 const struct config_param_list device_attr_list = {
41 .n_params = __DEV_ATTR_MAX,
45 static int __devlock = 0;
47 void device_lock(void)
52 void device_unlock(void)
56 device_free_unused(NULL);
59 static int set_device_state(struct device *dev, bool state)
70 simple_device_set_state(struct device *dev, bool state)
75 pdev = dev->parent.dev;
77 pdev = system_if_get_parent(dev);
79 device_add_user(&dev->parent, pdev);
84 ret = device_claim(&dev->parent);
86 device_release(&dev->parent);
91 return set_device_state(dev, state);
94 static struct device *
95 simple_device_create(const char *name, struct blob_attr *attr)
97 struct blob_attr *tb[__DEV_ATTR_MAX];
98 struct device *dev = NULL;
100 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
101 dev = device_get(name, true);
105 dev->set_state = simple_device_set_state;
106 device_init_settings(dev, tb);
111 static void simple_device_free(struct device *dev)
114 device_remove_user(&dev->parent);
119 const struct device_type simple_device_type = {
120 .name = "Network device",
121 .config_params = &device_attr_list,
123 .create = simple_device_create,
124 .check_state = system_if_check,
125 .free = simple_device_free,
129 alias_device_set_state(struct device *dev, bool state)
131 struct alias_device *alias;
133 alias = container_of(dev, struct alias_device, dev);
138 return device_claim(&alias->dep);
140 device_release(&alias->dep);
142 device_remove_user(&alias->dep);
146 static struct device *
147 alias_device_create(const char *name, struct blob_attr *attr)
149 struct alias_device *alias;
151 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
152 strcpy(alias->name, name);
153 alias->dev.set_state = alias_device_set_state;
154 device_init_virtual(&alias->dev, &alias_device_type, NULL);
155 alias->avl.key = alias->name;
156 avl_insert(&aliases, &alias->avl);
161 static void alias_device_free(struct device *dev)
163 struct alias_device *alias;
167 alias = container_of(dev, struct alias_device, dev);
168 avl_delete(&aliases, &alias->avl);
172 static const struct device_type alias_device_type = {
173 .name = "Network alias",
174 .create = alias_device_create,
175 .free = alias_device_free,
179 device_init_settings(struct device *dev, struct blob_attr **tb)
181 struct blob_attr *cur;
182 struct ether_addr *ea;
185 dev->disabled = false;
187 if ((cur = tb[DEV_ATTR_ENABLED]))
188 device_set_disabled(dev, !blobmsg_get_bool(cur));
190 if ((cur = tb[DEV_ATTR_MTU])) {
191 dev->mtu = blobmsg_get_u32(cur);
192 dev->flags |= DEV_OPT_MTU;
195 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
196 dev->txqueuelen = blobmsg_get_u32(cur);
197 dev->flags |= DEV_OPT_TXQUEUELEN;
200 if ((cur = tb[DEV_ATTR_MACADDR])) {
201 ea = ether_aton(blob_data(cur));
203 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
204 dev->flags |= DEV_OPT_MACADDR;
209 static void __init dev_init(void)
211 avl_init(&devices, avl_strcmp, true, NULL);
212 avl_init(&aliases, avl_strcmp, false, NULL);
215 static void device_broadcast_event(struct device *dev, enum device_event ev)
217 struct device_user *dep, *tmp;
219 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
228 alias_notify_device(const char *name, struct device *dev)
230 struct alias_device *alias;
234 alias = avl_find_element(&aliases, name, alias, avl);
238 alias->cleanup = !dev;
240 if (dev != alias->dep.dev) {
241 device_remove_user(&alias->dep);
242 strcpy(alias->dev.ifname, dev->ifname);
243 device_add_user(&alias->dep, dev);
247 device_set_present(&alias->dev, !!dev);
249 if (!dev && alias->dep.dev && !alias->dep.dev->active)
250 device_remove_user(&alias->dep);
255 int device_claim(struct device_user *dep)
257 struct device *dev = dep->dev;
264 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
265 if (++dev->active != 1)
268 device_broadcast_event(dev, DEV_EVENT_SETUP);
269 ret = dev->set_state(dev, true);
271 device_broadcast_event(dev, DEV_EVENT_UP);
273 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
275 dep->claimed = false;
281 void device_release(struct device_user *dep)
283 struct device *dev = dep->dev;
288 dep->claimed = false;
290 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
291 assert(dev->active >= 0);
296 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
297 dev->set_state(dev, false);
298 device_broadcast_event(dev, DEV_EVENT_DOWN);
301 int device_check_state(struct device *dev)
303 if (!dev->type->check_state)
306 return dev->type->check_state(dev);
309 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
315 strncpy(dev->ifname, name, IFNAMSIZ);
317 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
318 INIT_LIST_HEAD(&dev->users);
322 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
326 device_init_virtual(dev, type, ifname);
329 dev->set_state = set_device_state;
331 dev->avl.key = dev->ifname;
333 ret = avl_insert(&devices, &dev->avl);
337 system_if_clear_state(dev);
338 device_check_state(dev);
343 static struct device *
344 device_create_default(const char *name, bool external)
348 D(DEVICE, "Create simple device '%s'\n", name);
349 dev = calloc(1, sizeof(*dev));
350 dev->external = external;
351 dev->set_state = simple_device_set_state;
352 device_init(dev, &simple_device_type, name);
353 dev->default_config = true;
357 static struct device *
358 device_alias_get(const char *name)
360 struct alias_device *alias;
362 alias = avl_find_element(&aliases, name, alias, avl);
366 return alias_device_create(name, NULL);
370 device_get(const char *name, int create)
374 if (strchr(name, '.'))
375 return get_vlan_device_chain(name, create);
378 return device_alias_get(name + 1);
380 dev = avl_find_element(&devices, name, dev, avl);
387 return device_create_default(name, create > 1);
391 device_delete(struct device *dev)
396 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
397 avl_delete(&devices, &dev->avl);
401 void device_cleanup(struct device *dev)
403 struct device_user *dep, *tmp;
405 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
406 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
410 dep->cb(dep, DEV_EVENT_REMOVE);
417 static void __device_set_present(struct device *dev, bool state)
419 if (dev->present == state)
422 dev->present = state;
423 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
426 void device_set_present(struct device *dev, bool state)
428 if (dev->sys_present == state)
431 dev->sys_present = state;
432 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
434 if (state && dev->disabled)
437 __device_set_present(dev, state);
441 device_set_disabled(struct device *dev, bool value)
443 dev->disabled = value;
444 if (dev->sys_present)
445 __device_set_present(dev, !value);
448 void device_add_user(struct device_user *dep, struct device *dev)
451 list_add_tail(&dep->list, &dev->users);
452 if (dep->cb && dev->present) {
453 dep->cb(dep, DEV_EVENT_ADD);
455 dep->cb(dep, DEV_EVENT_UP);
460 device_free(struct device *dev)
463 dev->type->free(dev);
468 __device_free_unused(struct device *dev)
470 if (!list_empty(&dev->users) || dev->current_config || __devlock)
476 void device_remove_user(struct device_user *dep)
478 struct device *dev = dep->dev;
483 dep->hotplug = false;
487 list_del(&dep->list);
489 __device_free_unused(dev);
493 device_free_unused(struct device *dev)
498 return __device_free_unused(dev);
500 avl_for_each_element_safe(&devices, dev, avl, tmp)
501 __device_free_unused(dev);
505 device_init_pending(void)
507 struct device *dev, *tmp;
509 avl_for_each_element_safe(&devices, dev, avl, tmp) {
510 if (!dev->config_pending)
513 dev->type->config_init(dev);
514 dev->config_pending = false;
518 static enum dev_change_type
519 device_reload_config(struct device *dev, struct blob_attr *attr)
521 struct blob_attr *tb[__DEV_ATTR_MAX];
522 const struct config_param_list *cfg = dev->type->config_params;
524 if (config_check_equal(dev->config, attr, cfg))
525 return DEV_CONFIG_NO_CHANGE;
527 if (cfg == &device_attr_list) {
528 memset(tb, 0, sizeof(tb));
531 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
532 blob_data(attr), blob_len(attr));
534 device_init_settings(dev, tb);
535 return DEV_CONFIG_APPLIED;
537 return DEV_CONFIG_RECREATE;
541 device_set_config(struct device *dev, const struct device_type *type,
542 struct blob_attr *attr)
544 if (type != dev->type)
545 return DEV_CONFIG_RECREATE;
547 if (dev->type->reload)
548 return dev->type->reload(dev, attr);
550 return device_reload_config(dev, attr);
554 device_replace(struct device *dev, struct device *odev)
556 struct device_user *dep, *tmp;
557 bool present = odev->present;
560 device_set_present(odev, false);
562 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
564 list_move_tail(&dep->list, &dev->users);
570 device_set_present(dev, true);
574 device_reset_config(void)
578 avl_for_each_element(&devices, dev, avl)
579 dev->current_config = false;
583 device_reset_old(void)
585 struct device *dev, *tmp, *ndev;
587 avl_for_each_element_safe(&devices, dev, avl, tmp) {
588 if (dev->current_config || dev->default_config)
591 if (dev->type != &simple_device_type)
594 ndev = device_create_default(dev->ifname, dev->external);
595 device_replace(ndev, dev);
600 device_create(const char *name, const struct device_type *type,
601 struct blob_attr *config)
603 struct device *odev = NULL, *dev;
604 enum dev_change_type change;
606 config = config_memdup(config);
610 odev = device_get(name, false);
612 odev->current_config = true;
613 change = device_set_config(odev, type, config);
615 case DEV_CONFIG_APPLIED:
616 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
618 odev->config = config;
620 device_set_present(odev, false);
621 device_set_present(odev, true);
624 case DEV_CONFIG_NO_CHANGE:
625 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
628 case DEV_CONFIG_RECREATE:
629 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
634 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
636 dev = type->create(name, config);
640 dev->current_config = true;
641 dev->config = config;
643 device_replace(dev, odev);
645 if (!config_init && dev->config_pending)
646 type->config_init(dev);
652 device_dump_status(struct blob_buf *b, struct device *dev)
657 avl_for_each_element(&devices, dev, avl) {
660 c = blobmsg_open_table(b, dev->ifname);
661 device_dump_status(b, dev);
662 blobmsg_close_table(b, c);
671 blobmsg_add_string(b, "type", dev->type->name);
672 blobmsg_add_u8(b, "up", !!dev->active);
673 if (dev->type->dump_info)
674 dev->type->dump_info(dev, b);
676 system_if_dump_info(dev, b);
678 s = blobmsg_open_table(b, "statistics");
679 if (dev->type->dump_stats)
680 dev->type->dump_stats(dev, b);
682 system_if_dump_stats(dev, b);
683 blobmsg_close_table(b, s);