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 struct device *
59 simple_device_create(const char *name, struct blob_attr *attr)
61 struct blob_attr *tb[__DEV_ATTR_MAX];
62 struct device *dev = NULL;
64 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
65 dev = device_get(name, true);
69 device_init_settings(dev, tb);
74 static void simple_device_free(struct device *dev)
80 const struct device_type simple_device_type = {
81 .name = "Network device",
82 .config_params = &device_attr_list,
84 .create = simple_device_create,
85 .check_state = system_if_check,
86 .free = simple_device_free,
90 alias_device_set_state(struct device *dev, bool state)
92 struct alias_device *alias;
94 alias = container_of(dev, struct alias_device, dev);
99 return device_claim(&alias->dep);
101 device_release(&alias->dep);
103 device_remove_user(&alias->dep);
107 static struct device *
108 alias_device_create(const char *name, struct blob_attr *attr)
110 struct alias_device *alias;
112 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
113 strcpy(alias->name, name);
114 alias->dev.set_state = alias_device_set_state;
115 device_init_virtual(&alias->dev, &alias_device_type, NULL);
116 alias->avl.key = alias->name;
117 avl_insert(&aliases, &alias->avl);
122 static void alias_device_free(struct device *dev)
124 struct alias_device *alias;
128 alias = container_of(dev, struct alias_device, dev);
129 avl_delete(&aliases, &alias->avl);
133 static const struct device_type alias_device_type = {
134 .name = "Network alias",
135 .create = alias_device_create,
136 .free = alias_device_free,
140 device_init_settings(struct device *dev, struct blob_attr **tb)
142 struct blob_attr *cur;
143 struct ether_addr *ea;
147 if ((cur = tb[DEV_ATTR_MTU])) {
148 dev->mtu = blobmsg_get_u32(cur);
149 dev->flags |= DEV_OPT_MTU;
152 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
153 dev->txqueuelen = blobmsg_get_u32(cur);
154 dev->flags |= DEV_OPT_TXQUEUELEN;
157 if ((cur = tb[DEV_ATTR_MACADDR])) {
158 ea = ether_aton(blob_data(cur));
160 memcpy(dev->macaddr, ea, sizeof(dev->macaddr));
161 dev->flags |= DEV_OPT_MACADDR;
166 static void __init dev_init(void)
168 avl_init(&devices, avl_strcmp, true, NULL);
169 avl_init(&aliases, avl_strcmp, false, NULL);
172 static void device_broadcast_event(struct device *dev, enum device_event ev)
174 struct device_user *dep, *tmp;
176 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
185 alias_notify_device(const char *name, struct device *dev)
187 struct alias_device *alias;
191 alias = avl_find_element(&aliases, name, alias, avl);
195 alias->cleanup = !dev;
197 if (dev != alias->dep.dev) {
198 device_remove_user(&alias->dep);
199 strcpy(alias->dev.ifname, dev->ifname);
200 device_add_user(&alias->dep, dev);
204 device_set_present(&alias->dev, !!dev);
206 if (!dev && alias->dep.dev && !alias->dep.dev->active)
207 device_remove_user(&alias->dep);
212 static int set_device_state(struct device *dev, bool state)
222 int device_claim(struct device_user *dep)
224 struct device *dev = dep->dev;
231 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
232 if (++dev->active != 1)
235 device_broadcast_event(dev, DEV_EVENT_SETUP);
236 ret = dev->set_state(dev, true);
238 device_broadcast_event(dev, DEV_EVENT_UP);
240 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
242 dep->claimed = false;
248 void device_release(struct device_user *dep)
250 struct device *dev = dep->dev;
255 dep->claimed = false;
257 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
258 assert(dev->active >= 0);
263 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
264 dev->set_state(dev, false);
265 device_broadcast_event(dev, DEV_EVENT_DOWN);
268 int device_check_state(struct device *dev)
270 if (!dev->type->check_state)
273 return dev->type->check_state(dev);
276 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
282 strncpy(dev->ifname, name, IFNAMSIZ);
284 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
285 INIT_LIST_HEAD(&dev->users);
289 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
293 device_init_virtual(dev, type, ifname);
296 dev->set_state = set_device_state;
298 dev->avl.key = dev->ifname;
300 ret = avl_insert(&devices, &dev->avl);
304 system_if_clear_state(dev);
305 device_check_state(dev);
310 static struct device *
311 device_create_default(const char *name, bool external)
315 D(DEVICE, "Create simple device '%s'\n", name);
316 dev = calloc(1, sizeof(*dev));
317 dev->external = external;
318 device_init(dev, &simple_device_type, name);
319 dev->default_config = true;
323 static struct device *
324 device_alias_get(const char *name)
326 struct alias_device *alias;
328 alias = avl_find_element(&aliases, name, alias, avl);
332 return alias_device_create(name, NULL);
336 device_get(const char *name, int create)
340 if (strchr(name, '.'))
341 return get_vlan_device_chain(name, create);
344 return device_alias_get(name + 1);
346 dev = avl_find_element(&devices, name, dev, avl);
353 return device_create_default(name, create > 1);
357 device_delete(struct device *dev)
362 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
363 avl_delete(&devices, &dev->avl);
367 void device_cleanup(struct device *dev)
369 struct device_user *dep, *tmp;
371 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
372 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
376 dep->cb(dep, DEV_EVENT_REMOVE);
383 void device_set_present(struct device *dev, bool state)
385 if (dev->present == state)
388 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
389 dev->present = state;
390 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
393 void device_add_user(struct device_user *dep, struct device *dev)
396 list_add_tail(&dep->list, &dev->users);
397 if (dep->cb && dev->present) {
398 dep->cb(dep, DEV_EVENT_ADD);
400 dep->cb(dep, DEV_EVENT_UP);
405 __device_free_unused(struct device *dev)
407 if (!list_empty(&dev->users) || dev->current_config || __devlock)
413 void device_remove_user(struct device_user *dep)
415 struct device *dev = dep->dev;
420 dep->hotplug = false;
424 list_del(&dep->list);
426 __device_free_unused(dev);
430 device_free_unused(struct device *dev)
435 return __device_free_unused(dev);
437 avl_for_each_element_safe(&devices, dev, avl, tmp)
438 __device_free_unused(dev);
442 device_init_pending(void)
444 struct device *dev, *tmp;
446 avl_for_each_element_safe(&devices, dev, avl, tmp) {
447 if (!dev->config_pending)
450 dev->type->config_init(dev);
451 dev->config_pending = false;
455 static enum dev_change_type
456 device_reload_config(struct device *dev, struct blob_attr *attr)
458 struct blob_attr *tb[__DEV_ATTR_MAX];
459 const struct config_param_list *cfg = dev->type->config_params;
461 if (config_check_equal(dev->config, attr, cfg))
462 return DEV_CONFIG_NO_CHANGE;
464 if (cfg == &device_attr_list) {
465 memset(tb, 0, sizeof(tb));
468 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
469 blob_data(attr), blob_len(attr));
471 device_init_settings(dev, tb);
472 return DEV_CONFIG_APPLIED;
474 return DEV_CONFIG_RECREATE;
478 device_set_config(struct device *dev, const struct device_type *type,
479 struct blob_attr *attr)
481 if (type != dev->type)
482 return DEV_CONFIG_RECREATE;
484 if (dev->type->reload)
485 return dev->type->reload(dev, attr);
487 return device_reload_config(dev, attr);
491 device_replace(struct device *dev, struct device *odev)
493 struct device_user *dep, *tmp;
494 bool present = odev->present;
497 device_set_present(odev, false);
499 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
501 list_move_tail(&dep->list, &dev->users);
507 device_set_present(dev, true);
511 device_reset_config(void)
515 avl_for_each_element(&devices, dev, avl)
516 dev->current_config = false;
520 device_reset_old(void)
522 struct device *dev, *tmp, *ndev;
524 avl_for_each_element_safe(&devices, dev, avl, tmp) {
525 if (dev->current_config || dev->default_config)
528 if (dev->type != &simple_device_type)
531 ndev = device_create_default(dev->ifname, dev->external);
532 device_replace(ndev, dev);
537 device_create(const char *name, const struct device_type *type,
538 struct blob_attr *config)
540 struct device *odev = NULL, *dev;
541 enum dev_change_type change;
543 config = config_memdup(config);
547 odev = device_get(name, false);
549 odev->current_config = true;
550 change = device_set_config(odev, type, config);
552 case DEV_CONFIG_APPLIED:
553 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
555 odev->config = config;
557 device_set_present(odev, false);
558 device_set_present(odev, true);
561 case DEV_CONFIG_NO_CHANGE:
562 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
565 case DEV_CONFIG_RECREATE:
566 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
571 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
573 dev = type->create(name, config);
577 dev->current_config = true;
578 dev->config = config;
580 device_replace(dev, odev);
582 if (!config_init && dev->config_pending)
583 type->config_init(dev);
589 device_dump_status(struct blob_buf *b, struct device *dev)
594 avl_for_each_element(&devices, dev, avl) {
597 c = blobmsg_open_table(b, dev->ifname);
598 device_dump_status(b, dev);
599 blobmsg_close_table(b, c);
608 blobmsg_add_string(b, "type", dev->type->name);
609 blobmsg_add_u8(b, "up", !!dev->active);
610 if (dev->type->dump_info)
611 dev->type->dump_info(dev, b);
613 s = blobmsg_open_table(b, "statistics");
614 if (dev->type->dump_stats)
615 dev->type->dump_stats(dev, b);
617 system_if_dump_stats(dev, b);
618 blobmsg_close_table(b, s);