2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <net/ethernet.h>
24 #include <netinet/ether.h>
31 static struct avl_tree devices;
32 static struct avl_tree aliases;
37 struct device_user dep;
42 static const struct device_type alias_device_type;
44 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
45 [DEV_ATTR_TYPE] = { "type", BLOBMSG_TYPE_STRING },
46 [DEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
47 [DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
48 [DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
49 [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
50 [DEV_ATTR_ENABLED] = { "enabled", BLOBMSG_TYPE_BOOL },
53 const struct config_param_list device_attr_list = {
54 .n_params = __DEV_ATTR_MAX,
58 static int __devlock = 0;
60 void device_lock(void)
65 void device_unlock(void)
69 device_free_unused(NULL);
72 static int set_device_state(struct device *dev, bool state)
83 simple_device_set_state(struct device *dev, bool state)
88 pdev = dev->parent.dev;
90 pdev = system_if_get_parent(dev);
92 device_add_user(&dev->parent, pdev);
97 ret = device_claim(&dev->parent);
99 device_release(&dev->parent);
104 return set_device_state(dev, state);
107 static struct device *
108 simple_device_create(const char *name, struct blob_attr *attr)
110 struct blob_attr *tb[__DEV_ATTR_MAX];
111 struct device *dev = NULL;
113 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
114 dev = device_get(name, true);
118 dev->set_state = simple_device_set_state;
119 device_init_settings(dev, tb);
124 static void simple_device_free(struct device *dev)
127 device_remove_user(&dev->parent);
131 const struct device_type simple_device_type = {
132 .name = "Network device",
133 .config_params = &device_attr_list,
135 .create = simple_device_create,
136 .check_state = system_if_check,
137 .free = simple_device_free,
141 alias_device_set_state(struct device *dev, bool state)
143 struct alias_device *alias;
145 alias = container_of(dev, struct alias_device, dev);
150 return device_claim(&alias->dep);
152 device_release(&alias->dep);
154 device_remove_user(&alias->dep);
158 static struct device *
159 alias_device_create(const char *name, struct blob_attr *attr)
161 struct alias_device *alias;
163 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
164 strcpy(alias->name, name);
165 alias->dev.set_state = alias_device_set_state;
166 alias->dev.hidden = true;
167 device_init_virtual(&alias->dev, &alias_device_type, NULL);
168 alias->avl.key = alias->name;
169 avl_insert(&aliases, &alias->avl);
174 static void alias_device_free(struct device *dev)
176 struct alias_device *alias;
178 alias = container_of(dev, struct alias_device, dev);
179 avl_delete(&aliases, &alias->avl);
183 static const struct device_type alias_device_type = {
184 .name = "Network alias",
185 .create = alias_device_create,
186 .free = alias_device_free,
190 device_merge_settings(struct device *dev, struct device_settings *n)
192 struct device_settings *os = &dev->orig_settings;
193 struct device_settings *s = &dev->settings;
195 memset(n, 0, sizeof(*n));
196 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
197 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
198 s->txqueuelen : os->txqueuelen;
200 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
202 n->flags = s->flags | os->flags;
206 device_init_settings(struct device *dev, struct blob_attr **tb)
208 struct device_settings *s = &dev->settings;
209 struct blob_attr *cur;
210 struct ether_addr *ea;
211 bool disabled = false;
214 if ((cur = tb[DEV_ATTR_ENABLED]))
215 disabled = !blobmsg_get_bool(cur);
217 if ((cur = tb[DEV_ATTR_MTU])) {
218 s->mtu = blobmsg_get_u32(cur);
219 s->flags |= DEV_OPT_MTU;
222 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
223 s->txqueuelen = blobmsg_get_u32(cur);
224 s->flags |= DEV_OPT_TXQUEUELEN;
227 if ((cur = tb[DEV_ATTR_MACADDR])) {
228 ea = ether_aton(blobmsg_data(cur));
230 memcpy(s->macaddr, ea, 6);
231 s->flags |= DEV_OPT_MACADDR;
235 device_set_disabled(dev, disabled);
238 static void __init dev_init(void)
240 avl_init(&devices, avl_strcmp, true, NULL);
241 avl_init(&aliases, avl_strcmp, false, NULL);
244 void device_broadcast_event(struct device *dev, enum device_event ev)
246 struct device_user *dep, *tmp;
248 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
257 alias_notify_device(const char *name, struct device *dev)
259 struct alias_device *alias;
263 alias = avl_find_element(&aliases, name, alias, avl);
267 alias->cleanup = !dev;
269 if (dev != alias->dep.dev) {
270 device_remove_user(&alias->dep);
271 strcpy(alias->dev.ifname, dev->ifname);
272 device_add_user(&alias->dep, dev);
273 alias->dev.hidden = false;
274 device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
278 device_set_present(&alias->dev, !!dev);
280 if (!dev && alias->dep.dev && !alias->dep.dev->active) {
281 device_remove_user(&alias->dep);
282 alias->dev.hidden = true;
283 alias->dev.ifname[0] = 0;
284 device_broadcast_event(&alias->dev, DEV_EVENT_UPDATE_IFNAME);
290 int device_claim(struct device_user *dep)
292 struct device *dev = dep->dev;
299 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
300 if (++dev->active != 1)
303 device_broadcast_event(dev, DEV_EVENT_SETUP);
304 ret = dev->set_state(dev, true);
306 device_broadcast_event(dev, DEV_EVENT_UP);
308 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
310 dep->claimed = false;
316 void device_release(struct device_user *dep)
318 struct device *dev = dep->dev;
323 dep->claimed = false;
325 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
326 assert(dev->active >= 0);
331 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
333 dev->set_state(dev, false);
334 device_broadcast_event(dev, DEV_EVENT_DOWN);
337 int device_check_state(struct device *dev)
339 if (!dev->type->check_state)
342 return dev->type->check_state(dev);
345 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
351 strncpy(dev->ifname, name, IFNAMSIZ);
353 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
354 INIT_LIST_HEAD(&dev->users);
358 dev->set_state = set_device_state;
361 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
365 device_init_virtual(dev, type, ifname);
367 dev->avl.key = dev->ifname;
369 ret = avl_insert(&devices, &dev->avl);
373 system_if_clear_state(dev);
374 device_check_state(dev);
379 static struct device *
380 device_create_default(const char *name, bool external)
384 if (!external && system_if_force_external(name))
387 D(DEVICE, "Create simple device '%s'\n", name);
388 dev = calloc(1, sizeof(*dev));
389 dev->external = external;
390 dev->set_state = simple_device_set_state;
391 device_init(dev, &simple_device_type, name);
392 dev->default_config = true;
396 static struct device *
397 device_alias_get(const char *name)
399 struct alias_device *alias;
401 alias = avl_find_element(&aliases, name, alias, avl);
405 return alias_device_create(name, NULL);
409 device_get(const char *name, int create)
413 if (strchr(name, '.'))
414 return get_vlan_device_chain(name, create);
417 return device_alias_get(name + 1);
419 dev = avl_find_element(&devices, name, dev, avl);
426 return device_create_default(name, create > 1);
430 device_delete(struct device *dev)
435 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
436 avl_delete(&devices, &dev->avl);
440 void device_cleanup(struct device *dev)
442 struct device_user *dep, *tmp;
444 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
445 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
449 dep->cb(dep, DEV_EVENT_REMOVE);
456 static void __device_set_present(struct device *dev, bool state)
458 if (dev->present == state)
461 dev->present = state;
462 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
466 device_refresh_present(struct device *dev)
468 bool state = dev->sys_present;
470 if (dev->disabled || dev->deferred)
473 __device_set_present(dev, state);
476 void device_set_present(struct device *dev, bool state)
478 if (dev->sys_present == state)
481 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
482 dev->sys_present = state;
483 device_refresh_present(dev);
486 void device_add_user(struct device_user *dep, struct device *dev)
489 device_remove_user(dep);
495 list_add_tail(&dep->list, &dev->users);
496 if (dep->cb && dev->present) {
497 dep->cb(dep, DEV_EVENT_ADD);
499 dep->cb(dep, DEV_EVENT_UP);
504 device_free(struct device *dev)
509 dev->type->free(dev);
514 __device_free_unused(struct device *dev)
516 if (!list_empty(&dev->users) || dev->current_config || __devlock)
522 void device_remove_user(struct device_user *dep)
524 struct device *dev = dep->dev;
529 dep->hotplug = false;
533 list_del(&dep->list);
535 __device_free_unused(dev);
539 device_free_unused(struct device *dev)
544 return __device_free_unused(dev);
546 avl_for_each_element_safe(&devices, dev, avl, tmp)
547 __device_free_unused(dev);
551 device_init_pending(void)
553 struct device *dev, *tmp;
555 avl_for_each_element_safe(&devices, dev, avl, tmp) {
556 if (!dev->config_pending)
559 dev->type->config_init(dev);
560 dev->config_pending = false;
564 static enum dev_change_type
565 device_reload_config(struct device *dev, struct blob_attr *attr)
567 struct blob_attr *tb[__DEV_ATTR_MAX];
568 const struct config_param_list *cfg = dev->type->config_params;
570 if (config_check_equal(dev->config, attr, cfg))
571 return DEV_CONFIG_NO_CHANGE;
573 if (cfg == &device_attr_list) {
574 memset(tb, 0, sizeof(tb));
577 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
578 blob_data(attr), blob_len(attr));
580 device_init_settings(dev, tb);
581 return DEV_CONFIG_RESTART;
583 return DEV_CONFIG_RECREATE;
587 device_set_config(struct device *dev, const struct device_type *type,
588 struct blob_attr *attr)
590 if (type != dev->type)
591 return DEV_CONFIG_RECREATE;
593 if (dev->type->reload)
594 return dev->type->reload(dev, attr);
596 return device_reload_config(dev, attr);
600 device_replace(struct device *dev, struct device *odev)
602 struct device_user *dep, *tmp;
603 bool present = odev->present;
606 device_set_present(odev, false);
608 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
610 list_move_tail(&dep->list, &dev->users);
616 device_set_present(dev, true);
620 device_reset_config(void)
624 avl_for_each_element(&devices, dev, avl)
625 dev->current_config = false;
629 device_reset_old(void)
631 struct device *dev, *tmp, *ndev;
633 avl_for_each_element_safe(&devices, dev, avl, tmp) {
634 if (dev->current_config || dev->default_config)
637 if (dev->type != &simple_device_type)
640 ndev = device_create_default(dev->ifname, dev->external);
641 device_replace(ndev, dev);
646 device_create(const char *name, const struct device_type *type,
647 struct blob_attr *config)
649 struct device *odev = NULL, *dev;
650 enum dev_change_type change;
652 config = config_memdup(config);
656 odev = device_get(name, false);
658 odev->current_config = true;
659 change = device_set_config(odev, type, config);
661 case DEV_CONFIG_RESTART:
662 case DEV_CONFIG_APPLIED:
663 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
665 odev->config = config;
666 if (change == DEV_CONFIG_RESTART && odev->present) {
667 device_set_present(odev, false);
668 device_set_present(odev, true);
671 case DEV_CONFIG_NO_CHANGE:
672 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
675 case DEV_CONFIG_RECREATE:
676 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
681 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
683 dev = type->create(name, config);
687 dev->current_config = true;
688 dev->config = config;
690 device_replace(dev, odev);
692 if (!config_init && dev->config_pending)
693 type->config_init(dev);
699 device_dump_status(struct blob_buf *b, struct device *dev)
701 struct device_settings st;
705 avl_for_each_element(&devices, dev, avl) {
708 c = blobmsg_open_table(b, dev->ifname);
709 device_dump_status(b, dev);
710 blobmsg_close_table(b, c);
716 blobmsg_add_u8(b, "external", dev->external);
717 blobmsg_add_u8(b, "present", dev->present);
718 blobmsg_add_string(b, "type", dev->type->name);
723 blobmsg_add_u8(b, "up", !!dev->active);
724 if (dev->type->dump_info)
725 dev->type->dump_info(dev, b);
727 system_if_dump_info(dev, b);
730 device_merge_settings(dev, &st);
731 if (st.flags & DEV_OPT_MTU)
732 blobmsg_add_u32(b, "mtu", st.mtu);
733 if (st.flags & DEV_OPT_MACADDR)
734 blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
735 if (st.flags & DEV_OPT_TXQUEUELEN)
736 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
739 s = blobmsg_open_table(b, "statistics");
740 if (dev->type->dump_stats)
741 dev->type->dump_stats(dev, b);
743 system_if_dump_stats(dev, b);
744 blobmsg_close_table(b, s);