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_merge_settings(struct device *dev, struct device_settings *n)
181 struct device_settings *os = &dev->orig_settings;
182 struct device_settings *s = &dev->settings;
184 memset(n, 0, sizeof(*n));
185 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
186 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
187 s->txqueuelen : os->txqueuelen;
189 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
191 n->flags = s->flags | os->flags;
195 device_init_settings(struct device *dev, struct blob_attr **tb)
197 struct device_settings *s = &dev->settings;
198 struct blob_attr *cur;
199 struct ether_addr *ea;
200 bool disabled = false;
203 if ((cur = tb[DEV_ATTR_ENABLED]))
204 disabled = !blobmsg_get_bool(cur);
206 if ((cur = tb[DEV_ATTR_MTU])) {
207 s->mtu = blobmsg_get_u32(cur);
208 s->flags |= DEV_OPT_MTU;
211 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
212 s->txqueuelen = blobmsg_get_u32(cur);
213 s->flags |= DEV_OPT_TXQUEUELEN;
216 if ((cur = tb[DEV_ATTR_MACADDR])) {
217 ea = ether_aton(blob_data(cur));
219 memcpy(s->macaddr, ea, 6);
220 s->flags |= DEV_OPT_MACADDR;
224 device_set_disabled(dev, disabled);
227 static void __init dev_init(void)
229 avl_init(&devices, avl_strcmp, true, NULL);
230 avl_init(&aliases, avl_strcmp, false, NULL);
233 static void device_broadcast_event(struct device *dev, enum device_event ev)
235 struct device_user *dep, *tmp;
237 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
246 alias_notify_device(const char *name, struct device *dev)
248 struct alias_device *alias;
252 alias = avl_find_element(&aliases, name, alias, avl);
256 alias->cleanup = !dev;
258 if (dev != alias->dep.dev) {
259 device_remove_user(&alias->dep);
260 strcpy(alias->dev.ifname, dev->ifname);
261 device_add_user(&alias->dep, dev);
265 device_set_present(&alias->dev, !!dev);
267 if (!dev && alias->dep.dev && !alias->dep.dev->active)
268 device_remove_user(&alias->dep);
273 int device_claim(struct device_user *dep)
275 struct device *dev = dep->dev;
282 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
283 if (++dev->active != 1)
286 device_broadcast_event(dev, DEV_EVENT_SETUP);
287 ret = dev->set_state(dev, true);
289 device_broadcast_event(dev, DEV_EVENT_UP);
291 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
293 dep->claimed = false;
299 void device_release(struct device_user *dep)
301 struct device *dev = dep->dev;
306 dep->claimed = false;
308 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
309 assert(dev->active >= 0);
314 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
315 dev->set_state(dev, false);
316 device_broadcast_event(dev, DEV_EVENT_DOWN);
319 int device_check_state(struct device *dev)
321 if (!dev->type->check_state)
324 return dev->type->check_state(dev);
327 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
333 strncpy(dev->ifname, name, IFNAMSIZ);
335 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
336 INIT_LIST_HEAD(&dev->users);
340 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
344 device_init_virtual(dev, type, ifname);
347 dev->set_state = set_device_state;
349 dev->avl.key = dev->ifname;
351 ret = avl_insert(&devices, &dev->avl);
355 system_if_clear_state(dev);
356 device_check_state(dev);
361 static struct device *
362 device_create_default(const char *name, bool external)
366 D(DEVICE, "Create simple device '%s'\n", name);
367 dev = calloc(1, sizeof(*dev));
368 dev->external = external;
369 dev->set_state = simple_device_set_state;
370 device_init(dev, &simple_device_type, name);
371 dev->default_config = true;
375 static struct device *
376 device_alias_get(const char *name)
378 struct alias_device *alias;
380 alias = avl_find_element(&aliases, name, alias, avl);
384 return alias_device_create(name, NULL);
388 device_get(const char *name, int create)
392 if (strchr(name, '.'))
393 return get_vlan_device_chain(name, create);
396 return device_alias_get(name + 1);
398 dev = avl_find_element(&devices, name, dev, avl);
405 return device_create_default(name, create > 1);
409 device_delete(struct device *dev)
414 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
415 avl_delete(&devices, &dev->avl);
419 void device_cleanup(struct device *dev)
421 struct device_user *dep, *tmp;
423 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
424 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
428 dep->cb(dep, DEV_EVENT_REMOVE);
435 static void __device_set_present(struct device *dev, bool state)
437 if (dev->present == state)
440 dev->present = state;
441 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
444 void device_set_present(struct device *dev, bool state)
446 if (dev->sys_present == state)
449 dev->sys_present = state;
450 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
452 if (state && dev->disabled)
455 __device_set_present(dev, state);
459 device_set_disabled(struct device *dev, bool value)
461 dev->disabled = value;
462 if (dev->sys_present)
463 __device_set_present(dev, !value);
466 void device_add_user(struct device_user *dep, struct device *dev)
469 list_add_tail(&dep->list, &dev->users);
470 if (dep->cb && dev->present) {
471 dep->cb(dep, DEV_EVENT_ADD);
473 dep->cb(dep, DEV_EVENT_UP);
478 device_free(struct device *dev)
481 dev->type->free(dev);
486 __device_free_unused(struct device *dev)
488 if (!list_empty(&dev->users) || dev->current_config || __devlock)
494 void device_remove_user(struct device_user *dep)
496 struct device *dev = dep->dev;
501 dep->hotplug = false;
505 list_del(&dep->list);
507 __device_free_unused(dev);
511 device_free_unused(struct device *dev)
516 return __device_free_unused(dev);
518 avl_for_each_element_safe(&devices, dev, avl, tmp)
519 __device_free_unused(dev);
523 device_init_pending(void)
525 struct device *dev, *tmp;
527 avl_for_each_element_safe(&devices, dev, avl, tmp) {
528 if (!dev->config_pending)
531 dev->type->config_init(dev);
532 dev->config_pending = false;
536 static enum dev_change_type
537 device_reload_config(struct device *dev, struct blob_attr *attr)
539 struct blob_attr *tb[__DEV_ATTR_MAX];
540 const struct config_param_list *cfg = dev->type->config_params;
542 if (config_check_equal(dev->config, attr, cfg))
543 return DEV_CONFIG_NO_CHANGE;
545 if (cfg == &device_attr_list) {
546 memset(tb, 0, sizeof(tb));
549 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
550 blob_data(attr), blob_len(attr));
552 device_init_settings(dev, tb);
553 return DEV_CONFIG_APPLIED;
555 return DEV_CONFIG_RECREATE;
559 device_set_config(struct device *dev, const struct device_type *type,
560 struct blob_attr *attr)
562 if (type != dev->type)
563 return DEV_CONFIG_RECREATE;
565 if (dev->type->reload)
566 return dev->type->reload(dev, attr);
568 return device_reload_config(dev, attr);
572 device_replace(struct device *dev, struct device *odev)
574 struct device_user *dep, *tmp;
575 bool present = odev->present;
578 device_set_present(odev, false);
580 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
582 list_move_tail(&dep->list, &dev->users);
588 device_set_present(dev, true);
592 device_reset_config(void)
596 avl_for_each_element(&devices, dev, avl)
597 dev->current_config = false;
601 device_reset_old(void)
603 struct device *dev, *tmp, *ndev;
605 avl_for_each_element_safe(&devices, dev, avl, tmp) {
606 if (dev->current_config || dev->default_config)
609 if (dev->type != &simple_device_type)
612 ndev = device_create_default(dev->ifname, dev->external);
613 device_replace(ndev, dev);
618 device_create(const char *name, const struct device_type *type,
619 struct blob_attr *config)
621 struct device *odev = NULL, *dev;
622 enum dev_change_type change;
624 config = config_memdup(config);
628 odev = device_get(name, false);
630 odev->current_config = true;
631 change = device_set_config(odev, type, config);
633 case DEV_CONFIG_APPLIED:
634 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
636 odev->config = config;
638 device_set_present(odev, false);
639 device_set_present(odev, true);
642 case DEV_CONFIG_NO_CHANGE:
643 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
646 case DEV_CONFIG_RECREATE:
647 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
652 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
654 dev = type->create(name, config);
658 dev->current_config = true;
659 dev->config = config;
661 device_replace(dev, odev);
663 if (!config_init && dev->config_pending)
664 type->config_init(dev);
670 device_dump_status(struct blob_buf *b, struct device *dev)
672 struct device_settings st;
676 avl_for_each_element(&devices, dev, avl) {
679 c = blobmsg_open_table(b, dev->ifname);
680 device_dump_status(b, dev);
681 blobmsg_close_table(b, c);
690 blobmsg_add_string(b, "type", dev->type->name);
691 blobmsg_add_u8(b, "up", !!dev->active);
692 if (dev->type->dump_info)
693 dev->type->dump_info(dev, b);
695 system_if_dump_info(dev, b);
698 device_merge_settings(dev, &st);
699 if (st.flags & DEV_OPT_MTU)
700 blobmsg_add_u32(b, "mtu", st.mtu);
701 if (st.flags & DEV_OPT_MACADDR)
702 blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
703 if (st.flags & DEV_OPT_TXQUEUELEN)
704 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
707 s = blobmsg_open_table(b, "statistics");
708 if (dev->type->dump_stats)
709 dev->type->dump_stats(dev, b);
711 system_if_dump_stats(dev, b);
712 blobmsg_close_table(b, s);