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);
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;
164 alias = container_of(dev, struct alias_device, dev);
165 avl_delete(&aliases, &alias->avl);
169 static const struct device_type alias_device_type = {
170 .name = "Network alias",
171 .create = alias_device_create,
172 .free = alias_device_free,
176 device_merge_settings(struct device *dev, struct device_settings *n)
178 struct device_settings *os = &dev->orig_settings;
179 struct device_settings *s = &dev->settings;
181 memset(n, 0, sizeof(*n));
182 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
183 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
184 s->txqueuelen : os->txqueuelen;
186 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
188 n->flags = s->flags | os->flags;
192 device_init_settings(struct device *dev, struct blob_attr **tb)
194 struct device_settings *s = &dev->settings;
195 struct blob_attr *cur;
196 struct ether_addr *ea;
197 bool disabled = false;
200 if ((cur = tb[DEV_ATTR_ENABLED]))
201 disabled = !blobmsg_get_bool(cur);
203 if ((cur = tb[DEV_ATTR_MTU])) {
204 s->mtu = blobmsg_get_u32(cur);
205 s->flags |= DEV_OPT_MTU;
208 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
209 s->txqueuelen = blobmsg_get_u32(cur);
210 s->flags |= DEV_OPT_TXQUEUELEN;
213 if ((cur = tb[DEV_ATTR_MACADDR])) {
214 ea = ether_aton(blobmsg_data(cur));
216 memcpy(s->macaddr, ea, 6);
217 s->flags |= DEV_OPT_MACADDR;
221 device_set_disabled(dev, disabled);
224 static void __init dev_init(void)
226 avl_init(&devices, avl_strcmp, true, NULL);
227 avl_init(&aliases, avl_strcmp, false, NULL);
230 static void device_broadcast_event(struct device *dev, enum device_event ev)
232 struct device_user *dep, *tmp;
234 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
243 alias_notify_device(const char *name, struct device *dev)
245 struct alias_device *alias;
249 alias = avl_find_element(&aliases, name, alias, avl);
253 alias->cleanup = !dev;
255 if (dev != alias->dep.dev) {
256 device_remove_user(&alias->dep);
257 strcpy(alias->dev.ifname, dev->ifname);
258 device_add_user(&alias->dep, dev);
262 device_set_present(&alias->dev, !!dev);
264 if (!dev && alias->dep.dev && !alias->dep.dev->active)
265 device_remove_user(&alias->dep);
270 int device_claim(struct device_user *dep)
272 struct device *dev = dep->dev;
279 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
280 if (++dev->active != 1)
283 device_broadcast_event(dev, DEV_EVENT_SETUP);
284 ret = dev->set_state(dev, true);
286 device_broadcast_event(dev, DEV_EVENT_UP);
288 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
290 dep->claimed = false;
296 void device_release(struct device_user *dep)
298 struct device *dev = dep->dev;
303 dep->claimed = false;
305 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
306 assert(dev->active >= 0);
311 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
313 dev->set_state(dev, false);
314 device_broadcast_event(dev, DEV_EVENT_DOWN);
317 int device_check_state(struct device *dev)
319 if (!dev->type->check_state)
322 return dev->type->check_state(dev);
325 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
331 strncpy(dev->ifname, name, IFNAMSIZ);
333 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
334 INIT_LIST_HEAD(&dev->users);
338 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
342 device_init_virtual(dev, type, ifname);
345 dev->set_state = set_device_state;
347 dev->avl.key = dev->ifname;
349 ret = avl_insert(&devices, &dev->avl);
353 system_if_clear_state(dev);
354 device_check_state(dev);
359 static struct device *
360 device_create_default(const char *name, bool external)
364 D(DEVICE, "Create simple device '%s'\n", name);
365 dev = calloc(1, sizeof(*dev));
366 dev->external = external;
367 dev->set_state = simple_device_set_state;
368 device_init(dev, &simple_device_type, name);
369 dev->default_config = true;
373 static struct device *
374 device_alias_get(const char *name)
376 struct alias_device *alias;
378 alias = avl_find_element(&aliases, name, alias, avl);
382 return alias_device_create(name, NULL);
386 device_get(const char *name, int create)
390 if (strchr(name, '.'))
391 return get_vlan_device_chain(name, create);
394 return device_alias_get(name + 1);
396 dev = avl_find_element(&devices, name, dev, avl);
403 return device_create_default(name, create > 1);
407 device_delete(struct device *dev)
412 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
413 avl_delete(&devices, &dev->avl);
417 void device_cleanup(struct device *dev)
419 struct device_user *dep, *tmp;
421 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
422 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
426 dep->cb(dep, DEV_EVENT_REMOVE);
433 static void __device_set_present(struct device *dev, bool state)
435 if (dev->present == state)
438 dev->present = state;
439 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
442 void device_set_present(struct device *dev, bool state)
444 if (dev->sys_present == state)
447 dev->sys_present = state;
448 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
450 if (state && dev->disabled)
453 __device_set_present(dev, state);
457 device_set_disabled(struct device *dev, bool value)
459 dev->disabled = value;
460 if (dev->sys_present)
461 __device_set_present(dev, !value);
464 void device_add_user(struct device_user *dep, struct device *dev)
467 device_remove_user(dep);
473 list_add_tail(&dep->list, &dev->users);
474 if (dep->cb && dev->present) {
475 dep->cb(dep, DEV_EVENT_ADD);
477 dep->cb(dep, DEV_EVENT_UP);
482 device_free(struct device *dev)
487 dev->type->free(dev);
492 __device_free_unused(struct device *dev)
494 if (!list_empty(&dev->users) || dev->current_config || __devlock)
500 void device_remove_user(struct device_user *dep)
502 struct device *dev = dep->dev;
507 dep->hotplug = false;
511 list_del(&dep->list);
513 __device_free_unused(dev);
517 device_free_unused(struct device *dev)
522 return __device_free_unused(dev);
524 avl_for_each_element_safe(&devices, dev, avl, tmp)
525 __device_free_unused(dev);
529 device_init_pending(void)
531 struct device *dev, *tmp;
533 avl_for_each_element_safe(&devices, dev, avl, tmp) {
534 if (!dev->config_pending)
537 dev->type->config_init(dev);
538 dev->config_pending = false;
542 static enum dev_change_type
543 device_reload_config(struct device *dev, struct blob_attr *attr)
545 struct blob_attr *tb[__DEV_ATTR_MAX];
546 const struct config_param_list *cfg = dev->type->config_params;
548 if (config_check_equal(dev->config, attr, cfg))
549 return DEV_CONFIG_NO_CHANGE;
551 if (cfg == &device_attr_list) {
552 memset(tb, 0, sizeof(tb));
555 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
556 blob_data(attr), blob_len(attr));
558 device_init_settings(dev, tb);
559 return DEV_CONFIG_RESTART;
561 return DEV_CONFIG_RECREATE;
565 device_set_config(struct device *dev, const struct device_type *type,
566 struct blob_attr *attr)
568 if (type != dev->type)
569 return DEV_CONFIG_RECREATE;
571 if (dev->type->reload)
572 return dev->type->reload(dev, attr);
574 return device_reload_config(dev, attr);
578 device_replace(struct device *dev, struct device *odev)
580 struct device_user *dep, *tmp;
581 bool present = odev->present;
584 device_set_present(odev, false);
586 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
588 list_move_tail(&dep->list, &dev->users);
594 device_set_present(dev, true);
598 device_reset_config(void)
602 avl_for_each_element(&devices, dev, avl)
603 dev->current_config = false;
607 device_reset_old(void)
609 struct device *dev, *tmp, *ndev;
611 avl_for_each_element_safe(&devices, dev, avl, tmp) {
612 if (dev->current_config || dev->default_config)
615 if (dev->type != &simple_device_type)
618 ndev = device_create_default(dev->ifname, dev->external);
619 device_replace(ndev, dev);
624 device_create(const char *name, const struct device_type *type,
625 struct blob_attr *config)
627 struct device *odev = NULL, *dev;
628 enum dev_change_type change;
630 config = config_memdup(config);
634 odev = device_get(name, false);
636 odev->current_config = true;
637 change = device_set_config(odev, type, config);
639 case DEV_CONFIG_RESTART:
640 case DEV_CONFIG_APPLIED:
641 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
643 odev->config = config;
644 if (change == DEV_CONFIG_RESTART && odev->present) {
645 device_set_present(odev, false);
646 device_set_present(odev, true);
649 case DEV_CONFIG_NO_CHANGE:
650 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
653 case DEV_CONFIG_RECREATE:
654 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
659 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
661 dev = type->create(name, config);
665 dev->current_config = true;
666 dev->config = config;
668 device_replace(dev, odev);
670 if (!config_init && dev->config_pending)
671 type->config_init(dev);
677 device_dump_status(struct blob_buf *b, struct device *dev)
679 struct device_settings st;
683 avl_for_each_element(&devices, dev, avl) {
686 c = blobmsg_open_table(b, dev->ifname);
687 device_dump_status(b, dev);
688 blobmsg_close_table(b, c);
697 blobmsg_add_string(b, "type", dev->type->name);
698 blobmsg_add_u8(b, "up", !!dev->active);
699 if (dev->type->dump_info)
700 dev->type->dump_info(dev, b);
702 system_if_dump_info(dev, b);
705 device_merge_settings(dev, &st);
706 if (st.flags & DEV_OPT_MTU)
707 blobmsg_add_u32(b, "mtu", st.mtu);
708 if (st.flags & DEV_OPT_MACADDR)
709 blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
710 if (st.flags & DEV_OPT_TXQUEUELEN)
711 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
714 s = blobmsg_open_table(b, "statistics");
715 if (dev->type->dump_stats)
716 dev->type->dump_stats(dev, b);
718 system_if_dump_stats(dev, b);
719 blobmsg_close_table(b, s);