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 device_settings *s = &dev->settings;
182 struct blob_attr *cur;
183 struct ether_addr *ea;
186 dev->disabled = false;
188 if ((cur = tb[DEV_ATTR_ENABLED]))
189 device_set_disabled(dev, !blobmsg_get_bool(cur));
191 if ((cur = tb[DEV_ATTR_MTU])) {
192 s->mtu = blobmsg_get_u32(cur);
193 s->flags |= DEV_OPT_MTU;
196 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
197 s->txqueuelen = blobmsg_get_u32(cur);
198 s->flags |= DEV_OPT_TXQUEUELEN;
201 if ((cur = tb[DEV_ATTR_MACADDR])) {
202 ea = ether_aton(blob_data(cur));
204 memcpy(s->macaddr, ea, 6);
205 s->flags |= DEV_OPT_MACADDR;
210 static void __init dev_init(void)
212 avl_init(&devices, avl_strcmp, true, NULL);
213 avl_init(&aliases, avl_strcmp, false, NULL);
216 static void device_broadcast_event(struct device *dev, enum device_event ev)
218 struct device_user *dep, *tmp;
220 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
229 alias_notify_device(const char *name, struct device *dev)
231 struct alias_device *alias;
235 alias = avl_find_element(&aliases, name, alias, avl);
239 alias->cleanup = !dev;
241 if (dev != alias->dep.dev) {
242 device_remove_user(&alias->dep);
243 strcpy(alias->dev.ifname, dev->ifname);
244 device_add_user(&alias->dep, dev);
248 device_set_present(&alias->dev, !!dev);
250 if (!dev && alias->dep.dev && !alias->dep.dev->active)
251 device_remove_user(&alias->dep);
256 int device_claim(struct device_user *dep)
258 struct device *dev = dep->dev;
265 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
266 if (++dev->active != 1)
269 device_broadcast_event(dev, DEV_EVENT_SETUP);
270 ret = dev->set_state(dev, true);
272 device_broadcast_event(dev, DEV_EVENT_UP);
274 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
276 dep->claimed = false;
282 void device_release(struct device_user *dep)
284 struct device *dev = dep->dev;
289 dep->claimed = false;
291 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
292 assert(dev->active >= 0);
297 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
298 dev->set_state(dev, false);
299 device_broadcast_event(dev, DEV_EVENT_DOWN);
302 int device_check_state(struct device *dev)
304 if (!dev->type->check_state)
307 return dev->type->check_state(dev);
310 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
316 strncpy(dev->ifname, name, IFNAMSIZ);
318 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
319 INIT_LIST_HEAD(&dev->users);
323 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
327 device_init_virtual(dev, type, ifname);
330 dev->set_state = set_device_state;
332 dev->avl.key = dev->ifname;
334 ret = avl_insert(&devices, &dev->avl);
338 system_if_clear_state(dev);
339 device_check_state(dev);
344 static struct device *
345 device_create_default(const char *name, bool external)
349 D(DEVICE, "Create simple device '%s'\n", name);
350 dev = calloc(1, sizeof(*dev));
351 dev->external = external;
352 dev->set_state = simple_device_set_state;
353 device_init(dev, &simple_device_type, name);
354 dev->default_config = true;
358 static struct device *
359 device_alias_get(const char *name)
361 struct alias_device *alias;
363 alias = avl_find_element(&aliases, name, alias, avl);
367 return alias_device_create(name, NULL);
371 device_get(const char *name, int create)
375 if (strchr(name, '.'))
376 return get_vlan_device_chain(name, create);
379 return device_alias_get(name + 1);
381 dev = avl_find_element(&devices, name, dev, avl);
388 return device_create_default(name, create > 1);
392 device_delete(struct device *dev)
397 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
398 avl_delete(&devices, &dev->avl);
402 void device_cleanup(struct device *dev)
404 struct device_user *dep, *tmp;
406 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
407 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
411 dep->cb(dep, DEV_EVENT_REMOVE);
418 static void __device_set_present(struct device *dev, bool state)
420 if (dev->present == state)
423 dev->present = state;
424 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
427 void device_set_present(struct device *dev, bool state)
429 if (dev->sys_present == state)
432 dev->sys_present = state;
433 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
435 if (state && dev->disabled)
438 __device_set_present(dev, state);
442 device_set_disabled(struct device *dev, bool value)
444 dev->disabled = value;
445 if (dev->sys_present)
446 __device_set_present(dev, !value);
449 void device_add_user(struct device_user *dep, struct device *dev)
452 list_add_tail(&dep->list, &dev->users);
453 if (dep->cb && dev->present) {
454 dep->cb(dep, DEV_EVENT_ADD);
456 dep->cb(dep, DEV_EVENT_UP);
461 device_free(struct device *dev)
464 dev->type->free(dev);
469 __device_free_unused(struct device *dev)
471 if (!list_empty(&dev->users) || dev->current_config || __devlock)
477 void device_remove_user(struct device_user *dep)
479 struct device *dev = dep->dev;
484 dep->hotplug = false;
488 list_del(&dep->list);
490 __device_free_unused(dev);
494 device_free_unused(struct device *dev)
499 return __device_free_unused(dev);
501 avl_for_each_element_safe(&devices, dev, avl, tmp)
502 __device_free_unused(dev);
506 device_init_pending(void)
508 struct device *dev, *tmp;
510 avl_for_each_element_safe(&devices, dev, avl, tmp) {
511 if (!dev->config_pending)
514 dev->type->config_init(dev);
515 dev->config_pending = false;
519 static enum dev_change_type
520 device_reload_config(struct device *dev, struct blob_attr *attr)
522 struct blob_attr *tb[__DEV_ATTR_MAX];
523 const struct config_param_list *cfg = dev->type->config_params;
525 if (config_check_equal(dev->config, attr, cfg))
526 return DEV_CONFIG_NO_CHANGE;
528 if (cfg == &device_attr_list) {
529 memset(tb, 0, sizeof(tb));
532 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
533 blob_data(attr), blob_len(attr));
535 device_init_settings(dev, tb);
536 return DEV_CONFIG_APPLIED;
538 return DEV_CONFIG_RECREATE;
542 device_set_config(struct device *dev, const struct device_type *type,
543 struct blob_attr *attr)
545 if (type != dev->type)
546 return DEV_CONFIG_RECREATE;
548 if (dev->type->reload)
549 return dev->type->reload(dev, attr);
551 return device_reload_config(dev, attr);
555 device_replace(struct device *dev, struct device *odev)
557 struct device_user *dep, *tmp;
558 bool present = odev->present;
561 device_set_present(odev, false);
563 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
565 list_move_tail(&dep->list, &dev->users);
571 device_set_present(dev, true);
575 device_reset_config(void)
579 avl_for_each_element(&devices, dev, avl)
580 dev->current_config = false;
584 device_reset_old(void)
586 struct device *dev, *tmp, *ndev;
588 avl_for_each_element_safe(&devices, dev, avl, tmp) {
589 if (dev->current_config || dev->default_config)
592 if (dev->type != &simple_device_type)
595 ndev = device_create_default(dev->ifname, dev->external);
596 device_replace(ndev, dev);
601 device_create(const char *name, const struct device_type *type,
602 struct blob_attr *config)
604 struct device *odev = NULL, *dev;
605 enum dev_change_type change;
607 config = config_memdup(config);
611 odev = device_get(name, false);
613 odev->current_config = true;
614 change = device_set_config(odev, type, config);
616 case DEV_CONFIG_APPLIED:
617 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
619 odev->config = config;
621 device_set_present(odev, false);
622 device_set_present(odev, true);
625 case DEV_CONFIG_NO_CHANGE:
626 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
629 case DEV_CONFIG_RECREATE:
630 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
635 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
637 dev = type->create(name, config);
641 dev->current_config = true;
642 dev->config = config;
644 device_replace(dev, odev);
646 if (!config_init && dev->config_pending)
647 type->config_init(dev);
653 device_dump_status(struct blob_buf *b, struct device *dev)
658 avl_for_each_element(&devices, dev, avl) {
661 c = blobmsg_open_table(b, dev->ifname);
662 device_dump_status(b, dev);
663 blobmsg_close_table(b, c);
672 blobmsg_add_string(b, "type", dev->type->name);
673 blobmsg_add_u8(b, "up", !!dev->active);
674 if (dev->type->dump_info)
675 dev->type->dump_info(dev, b);
677 system_if_dump_info(dev, b);
679 s = blobmsg_open_table(b, "statistics");
680 if (dev->type->dump_stats)
681 dev->type->dump_stats(dev, b);
683 system_if_dump_stats(dev, b);
684 blobmsg_close_table(b, s);