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 device_init_virtual(&alias->dev, &alias_device_type, NULL);
167 alias->avl.key = alias->name;
168 avl_insert(&aliases, &alias->avl);
173 static void alias_device_free(struct device *dev)
175 struct alias_device *alias;
177 alias = container_of(dev, struct alias_device, dev);
178 avl_delete(&aliases, &alias->avl);
182 static const struct device_type alias_device_type = {
183 .name = "Network alias",
184 .create = alias_device_create,
185 .free = alias_device_free,
189 device_merge_settings(struct device *dev, struct device_settings *n)
191 struct device_settings *os = &dev->orig_settings;
192 struct device_settings *s = &dev->settings;
194 memset(n, 0, sizeof(*n));
195 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
196 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
197 s->txqueuelen : os->txqueuelen;
199 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
201 n->flags = s->flags | os->flags;
205 device_init_settings(struct device *dev, struct blob_attr **tb)
207 struct device_settings *s = &dev->settings;
208 struct blob_attr *cur;
209 struct ether_addr *ea;
210 bool disabled = false;
213 if ((cur = tb[DEV_ATTR_ENABLED]))
214 disabled = !blobmsg_get_bool(cur);
216 if ((cur = tb[DEV_ATTR_MTU])) {
217 s->mtu = blobmsg_get_u32(cur);
218 s->flags |= DEV_OPT_MTU;
221 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
222 s->txqueuelen = blobmsg_get_u32(cur);
223 s->flags |= DEV_OPT_TXQUEUELEN;
226 if ((cur = tb[DEV_ATTR_MACADDR])) {
227 ea = ether_aton(blobmsg_data(cur));
229 memcpy(s->macaddr, ea, 6);
230 s->flags |= DEV_OPT_MACADDR;
234 device_set_disabled(dev, disabled);
237 static void __init dev_init(void)
239 avl_init(&devices, avl_strcmp, true, NULL);
240 avl_init(&aliases, avl_strcmp, false, NULL);
243 static void device_broadcast_event(struct device *dev, enum device_event ev)
245 struct device_user *dep, *tmp;
247 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
256 alias_notify_device(const char *name, struct device *dev)
258 struct alias_device *alias;
262 alias = avl_find_element(&aliases, name, alias, avl);
266 alias->cleanup = !dev;
268 if (dev != alias->dep.dev) {
269 device_remove_user(&alias->dep);
270 strcpy(alias->dev.ifname, dev->ifname);
271 device_add_user(&alias->dep, dev);
275 device_set_present(&alias->dev, !!dev);
277 if (!dev && alias->dep.dev && !alias->dep.dev->active)
278 device_remove_user(&alias->dep);
283 int device_claim(struct device_user *dep)
285 struct device *dev = dep->dev;
292 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
293 if (++dev->active != 1)
296 device_broadcast_event(dev, DEV_EVENT_SETUP);
297 ret = dev->set_state(dev, true);
299 device_broadcast_event(dev, DEV_EVENT_UP);
301 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
303 dep->claimed = false;
309 void device_release(struct device_user *dep)
311 struct device *dev = dep->dev;
316 dep->claimed = false;
318 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
319 assert(dev->active >= 0);
324 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
326 dev->set_state(dev, false);
327 device_broadcast_event(dev, DEV_EVENT_DOWN);
330 int device_check_state(struct device *dev)
332 if (!dev->type->check_state)
335 return dev->type->check_state(dev);
338 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
344 strncpy(dev->ifname, name, IFNAMSIZ);
346 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
347 INIT_LIST_HEAD(&dev->users);
351 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
355 device_init_virtual(dev, type, ifname);
358 dev->set_state = set_device_state;
360 dev->avl.key = dev->ifname;
362 ret = avl_insert(&devices, &dev->avl);
366 system_if_clear_state(dev);
367 device_check_state(dev);
372 static struct device *
373 device_create_default(const char *name, bool external)
377 if (!external && system_if_force_external(name))
380 D(DEVICE, "Create simple device '%s'\n", name);
381 dev = calloc(1, sizeof(*dev));
382 dev->external = external;
383 dev->set_state = simple_device_set_state;
384 device_init(dev, &simple_device_type, name);
385 dev->default_config = true;
389 static struct device *
390 device_alias_get(const char *name)
392 struct alias_device *alias;
394 alias = avl_find_element(&aliases, name, alias, avl);
398 return alias_device_create(name, NULL);
402 device_get(const char *name, int create)
406 if (strchr(name, '.'))
407 return get_vlan_device_chain(name, create);
410 return device_alias_get(name + 1);
412 dev = avl_find_element(&devices, name, dev, avl);
419 return device_create_default(name, create > 1);
423 device_delete(struct device *dev)
428 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
429 avl_delete(&devices, &dev->avl);
433 void device_cleanup(struct device *dev)
435 struct device_user *dep, *tmp;
437 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
438 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
442 dep->cb(dep, DEV_EVENT_REMOVE);
449 static void __device_set_present(struct device *dev, bool state)
451 if (dev->present == state)
454 dev->present = state;
455 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
459 device_refresh_present(struct device *dev)
461 bool state = dev->sys_present;
463 if (dev->disabled || dev->deferred)
466 __device_set_present(dev, state);
469 void device_set_present(struct device *dev, bool state)
471 if (dev->sys_present == state)
474 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
475 dev->sys_present = state;
476 device_refresh_present(dev);
479 void device_add_user(struct device_user *dep, struct device *dev)
482 device_remove_user(dep);
488 list_add_tail(&dep->list, &dev->users);
489 if (dep->cb && dev->present) {
490 dep->cb(dep, DEV_EVENT_ADD);
492 dep->cb(dep, DEV_EVENT_UP);
497 device_free(struct device *dev)
502 dev->type->free(dev);
507 __device_free_unused(struct device *dev)
509 if (!list_empty(&dev->users) || dev->current_config || __devlock)
515 void device_remove_user(struct device_user *dep)
517 struct device *dev = dep->dev;
522 dep->hotplug = false;
526 list_del(&dep->list);
528 __device_free_unused(dev);
532 device_free_unused(struct device *dev)
537 return __device_free_unused(dev);
539 avl_for_each_element_safe(&devices, dev, avl, tmp)
540 __device_free_unused(dev);
544 device_init_pending(void)
546 struct device *dev, *tmp;
548 avl_for_each_element_safe(&devices, dev, avl, tmp) {
549 if (!dev->config_pending)
552 dev->type->config_init(dev);
553 dev->config_pending = false;
557 static enum dev_change_type
558 device_reload_config(struct device *dev, struct blob_attr *attr)
560 struct blob_attr *tb[__DEV_ATTR_MAX];
561 const struct config_param_list *cfg = dev->type->config_params;
563 if (config_check_equal(dev->config, attr, cfg))
564 return DEV_CONFIG_NO_CHANGE;
566 if (cfg == &device_attr_list) {
567 memset(tb, 0, sizeof(tb));
570 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
571 blob_data(attr), blob_len(attr));
573 device_init_settings(dev, tb);
574 return DEV_CONFIG_RESTART;
576 return DEV_CONFIG_RECREATE;
580 device_set_config(struct device *dev, const struct device_type *type,
581 struct blob_attr *attr)
583 if (type != dev->type)
584 return DEV_CONFIG_RECREATE;
586 if (dev->type->reload)
587 return dev->type->reload(dev, attr);
589 return device_reload_config(dev, attr);
593 device_replace(struct device *dev, struct device *odev)
595 struct device_user *dep, *tmp;
596 bool present = odev->present;
599 device_set_present(odev, false);
601 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
603 list_move_tail(&dep->list, &dev->users);
609 device_set_present(dev, true);
613 device_reset_config(void)
617 avl_for_each_element(&devices, dev, avl)
618 dev->current_config = false;
622 device_reset_old(void)
624 struct device *dev, *tmp, *ndev;
626 avl_for_each_element_safe(&devices, dev, avl, tmp) {
627 if (dev->current_config || dev->default_config)
630 if (dev->type != &simple_device_type)
633 ndev = device_create_default(dev->ifname, dev->external);
634 device_replace(ndev, dev);
639 device_create(const char *name, const struct device_type *type,
640 struct blob_attr *config)
642 struct device *odev = NULL, *dev;
643 enum dev_change_type change;
645 config = config_memdup(config);
649 odev = device_get(name, false);
651 odev->current_config = true;
652 change = device_set_config(odev, type, config);
654 case DEV_CONFIG_RESTART:
655 case DEV_CONFIG_APPLIED:
656 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
658 odev->config = config;
659 if (change == DEV_CONFIG_RESTART && odev->present) {
660 device_set_present(odev, false);
661 device_set_present(odev, true);
664 case DEV_CONFIG_NO_CHANGE:
665 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
668 case DEV_CONFIG_RECREATE:
669 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
674 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
676 dev = type->create(name, config);
680 dev->current_config = true;
681 dev->config = config;
683 device_replace(dev, odev);
685 if (!config_init && dev->config_pending)
686 type->config_init(dev);
692 device_dump_status(struct blob_buf *b, struct device *dev)
694 struct device_settings st;
698 avl_for_each_element(&devices, dev, avl) {
701 c = blobmsg_open_table(b, dev->ifname);
702 device_dump_status(b, dev);
703 blobmsg_close_table(b, c);
709 blobmsg_add_u8(b, "external", dev->external);
710 blobmsg_add_u8(b, "present", dev->present);
711 blobmsg_add_string(b, "type", dev->type->name);
716 blobmsg_add_u8(b, "up", !!dev->active);
717 if (dev->type->dump_info)
718 dev->type->dump_info(dev, b);
720 system_if_dump_info(dev, b);
723 device_merge_settings(dev, &st);
724 if (st.flags & DEV_OPT_MTU)
725 blobmsg_add_u32(b, "mtu", st.mtu);
726 if (st.flags & DEV_OPT_MACADDR)
727 blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
728 if (st.flags & DEV_OPT_TXQUEUELEN)
729 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
732 s = blobmsg_open_table(b, "statistics");
733 if (dev->type->dump_stats)
734 dev->type->dump_stats(dev, b);
736 system_if_dump_stats(dev, b);
737 blobmsg_close_table(b, s);