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;
33 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
34 [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
35 [DEV_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_ARRAY },
36 [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
37 [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
38 [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
39 [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
40 [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
41 [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
42 [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
45 const struct uci_blob_param_list device_attr_list = {
46 .n_params = __DEV_ATTR_MAX,
50 static int __devlock = 0;
52 void device_lock(void)
57 void device_unlock(void)
61 device_free_unused(NULL);
64 static int set_device_state(struct device *dev, bool state)
67 /* Set ifindex for all devices being enabled so a valid */
68 /* ifindex is in place avoiding possible race conditions */
69 device_set_ifindex(dev, system_if_resolve(dev));
86 simple_device_set_state(struct device *dev, bool state)
91 pdev = dev->parent.dev;
93 pdev = system_if_get_parent(dev);
95 device_add_user(&dev->parent, pdev);
100 ret = device_claim(&dev->parent);
102 device_release(&dev->parent);
107 return set_device_state(dev, state);
110 static struct device *
111 simple_device_create(const char *name, struct blob_attr *attr)
113 struct blob_attr *tb[__DEV_ATTR_MAX];
114 struct device *dev = NULL;
116 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
117 dev = device_get(name, true);
121 dev->set_state = simple_device_set_state;
122 device_init_settings(dev, tb);
127 static void simple_device_free(struct device *dev)
130 device_remove_user(&dev->parent);
134 const struct device_type simple_device_type = {
135 .name = "Network device",
136 .config_params = &device_attr_list,
138 .create = simple_device_create,
139 .check_state = system_if_check,
140 .free = simple_device_free,
144 device_merge_settings(struct device *dev, struct device_settings *n)
146 struct device_settings *os = &dev->orig_settings;
147 struct device_settings *s = &dev->settings;
149 memset(n, 0, sizeof(*n));
150 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
151 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
152 s->txqueuelen : os->txqueuelen;
154 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
156 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
157 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
158 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
159 n->flags = s->flags | os->flags;
163 device_init_settings(struct device *dev, struct blob_attr **tb)
165 struct device_settings *s = &dev->settings;
166 struct blob_attr *cur;
167 struct ether_addr *ea;
168 bool disabled = false;
171 if ((cur = tb[DEV_ATTR_ENABLED]))
172 disabled = !blobmsg_get_bool(cur);
174 if ((cur = tb[DEV_ATTR_MTU])) {
175 s->mtu = blobmsg_get_u32(cur);
176 s->flags |= DEV_OPT_MTU;
179 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
180 s->txqueuelen = blobmsg_get_u32(cur);
181 s->flags |= DEV_OPT_TXQUEUELEN;
184 if ((cur = tb[DEV_ATTR_MACADDR])) {
185 ea = ether_aton(blobmsg_data(cur));
187 memcpy(s->macaddr, ea, 6);
188 s->flags |= DEV_OPT_MACADDR;
192 if ((cur = tb[DEV_ATTR_IPV6])) {
193 s->ipv6 = blobmsg_get_bool(cur);
194 s->flags |= DEV_OPT_IPV6;
197 if ((cur = tb[DEV_ATTR_PROMISC])) {
198 s->promisc = blobmsg_get_bool(cur);
199 s->flags |= DEV_OPT_PROMISC;
202 if ((cur = tb[DEV_ATTR_RPFILTER])) {
203 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
204 s->flags |= DEV_OPT_RPFILTER;
206 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
209 device_set_disabled(dev, disabled);
212 static void __init dev_init(void)
214 avl_init(&devices, avl_strcmp, true, NULL);
217 static int device_broadcast_cb(void *ctx, struct safe_list *list)
219 struct device_user *dep = container_of(list, struct device_user, list);
222 /* device might have been removed by an earlier callback */
231 void device_broadcast_event(struct device *dev, enum device_event ev)
235 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
236 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
239 int device_claim(struct device_user *dep)
241 struct device *dev = dep->dev;
248 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
249 if (++dev->active != 1)
252 device_broadcast_event(dev, DEV_EVENT_SETUP);
253 ret = dev->set_state(dev, true);
255 device_broadcast_event(dev, DEV_EVENT_UP);
257 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
259 dep->claimed = false;
265 void device_release(struct device_user *dep)
267 struct device *dev = dep->dev;
272 dep->claimed = false;
274 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
275 assert(dev->active >= 0);
280 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
282 dev->set_state(dev, false);
283 device_broadcast_event(dev, DEV_EVENT_DOWN);
286 int device_check_state(struct device *dev)
288 if (!dev->type->check_state)
289 return simple_device_type.check_state(dev);
291 return dev->type->check_state(dev);
294 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
300 strncpy(dev->ifname, name, IFNAMSIZ);
302 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
303 INIT_SAFE_LIST(&dev->users);
304 INIT_SAFE_LIST(&dev->aliases);
308 dev->set_state = set_device_state;
311 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
315 device_init_virtual(dev, type, ifname);
317 dev->avl.key = dev->ifname;
319 ret = avl_insert(&devices, &dev->avl);
323 system_if_clear_state(dev);
324 device_check_state(dev);
329 static struct device *
330 device_create_default(const char *name, bool external)
334 if (!external && system_if_force_external(name))
337 D(DEVICE, "Create simple device '%s'\n", name);
338 dev = calloc(1, sizeof(*dev));
339 dev->external = external;
340 dev->set_state = simple_device_set_state;
341 device_init(dev, &simple_device_type, name);
342 dev->default_config = true;
347 device_get(const char *name, int create)
351 if (strchr(name, '.'))
352 return get_vlan_device_chain(name, create);
355 return device_alias_get(name + 1);
357 dev = avl_find_element(&devices, name, dev, avl);
359 if (create > 1 && !dev->external) {
360 dev->external = true;
361 device_set_present(dev, true);
369 return device_create_default(name, create > 1);
373 device_delete(struct device *dev)
378 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
379 avl_delete(&devices, &dev->avl);
383 static int device_cleanup_cb(void *ctx, struct safe_list *list)
385 struct device_user *dep = container_of(list, struct device_user, list);
387 dep->cb(dep, DEV_EVENT_REMOVE);
393 void device_cleanup(struct device *dev)
395 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
396 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
397 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
401 static void __device_set_present(struct device *dev, bool state)
403 if (dev->present == state)
406 dev->present = state;
407 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
411 device_refresh_present(struct device *dev)
413 bool state = dev->sys_present;
415 if (dev->disabled || dev->deferred)
418 __device_set_present(dev, state);
421 void device_set_present(struct device *dev, bool state)
423 if (dev->sys_present == state)
426 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
427 dev->sys_present = state;
428 device_refresh_present(dev);
431 void device_set_link(struct device *dev, bool state)
433 if (dev->link_active == state)
436 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
438 dev->link_active = state;
439 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
442 void device_set_ifindex(struct device *dev, int ifindex)
444 if (dev->ifindex == ifindex)
447 dev->ifindex = ifindex;
448 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
451 static int device_refcount(struct device *dev)
453 struct list_head *list;
456 list_for_each(list, &dev->users.list)
459 list_for_each(list, &dev->aliases.list)
465 void device_add_user(struct device_user *dep, struct device *dev)
467 struct safe_list *head;
473 device_remove_user(dep);
481 head = &dev->aliases;
485 safe_list_add(&dep->list, head);
486 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
488 if (dep->cb && dev->present) {
489 dep->cb(dep, DEV_EVENT_ADD);
491 dep->cb(dep, DEV_EVENT_UP);
493 if (dev->link_active)
494 dep->cb(dep, DEV_EVENT_LINK_UP);
499 device_free(struct device *dev)
504 dev->type->free(dev);
509 __device_free_unused(struct device *dev)
511 if (!safe_list_empty(&dev->users) ||
512 !safe_list_empty(&dev->aliases) ||
513 dev->current_config || __devlock)
519 void device_remove_user(struct device_user *dep)
521 struct device *dev = dep->dev;
526 dep->hotplug = false;
530 safe_list_del(&dep->list);
532 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
533 __device_free_unused(dev);
537 device_free_unused(struct device *dev)
542 return __device_free_unused(dev);
544 avl_for_each_element_safe(&devices, dev, avl, tmp)
545 __device_free_unused(dev);
549 device_init_pending(void)
551 struct device *dev, *tmp;
553 avl_for_each_element_safe(&devices, dev, avl, tmp) {
554 if (!dev->config_pending)
557 dev->type->config_init(dev);
558 dev->config_pending = false;
562 static enum dev_change_type
563 device_reload_config(struct device *dev, struct blob_attr *attr)
565 struct blob_attr *tb[__DEV_ATTR_MAX];
566 const struct uci_blob_param_list *cfg = dev->type->config_params;
568 if (uci_blob_check_equal(dev->config, attr, cfg))
569 return DEV_CONFIG_NO_CHANGE;
571 if (cfg == &device_attr_list) {
572 memset(tb, 0, sizeof(tb));
575 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
576 blob_data(attr), blob_len(attr));
578 device_init_settings(dev, tb);
579 return DEV_CONFIG_RESTART;
581 return DEV_CONFIG_RECREATE;
585 device_set_config(struct device *dev, const struct device_type *type,
586 struct blob_attr *attr)
588 if (type != dev->type)
589 return DEV_CONFIG_RECREATE;
591 if (dev->type->reload)
592 return dev->type->reload(dev, attr);
594 return device_reload_config(dev, attr);
598 device_replace(struct device *dev, struct device *odev)
600 struct device_user *dep, *tmp;
601 bool present = odev->present;
604 device_set_present(odev, false);
606 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
608 safe_list_del(&dep->list);
609 safe_list_add(&dep->list, &dev->users);
615 device_set_present(dev, true);
619 device_reset_config(void)
623 avl_for_each_element(&devices, dev, avl)
624 dev->current_config = false;
628 device_reset_old(void)
630 struct device *dev, *tmp, *ndev;
632 avl_for_each_element_safe(&devices, dev, avl, tmp) {
633 if (dev->current_config || dev->default_config)
636 if (dev->type != &simple_device_type)
639 ndev = device_create_default(dev->ifname, dev->external);
640 device_replace(ndev, dev);
645 device_create(const char *name, const struct device_type *type,
646 struct blob_attr *config)
648 struct device *odev = NULL, *dev;
649 enum dev_change_type change;
651 config = blob_memdup(config);
655 odev = device_get(name, false);
657 odev->current_config = true;
658 change = device_set_config(odev, type, config);
659 if (odev->external) {
660 system_if_apply_settings(odev, &odev->settings, odev->settings.flags);
661 change = DEV_CONFIG_APPLIED;
664 case DEV_CONFIG_RESTART:
665 case DEV_CONFIG_APPLIED:
666 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
668 odev->config = config;
669 if (change == DEV_CONFIG_RESTART && odev->present) {
670 device_set_present(odev, false);
671 device_set_present(odev, true);
674 case DEV_CONFIG_NO_CHANGE:
675 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
678 case DEV_CONFIG_RECREATE:
679 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
684 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
686 dev = type->create(name, config);
690 dev->current_config = true;
691 dev->config = config;
693 device_replace(dev, odev);
695 if (!config_init && dev->config_pending)
696 type->config_init(dev);
702 device_dump_status(struct blob_buf *b, struct device *dev)
704 struct device_settings st;
708 avl_for_each_element(&devices, dev, avl) {
711 c = blobmsg_open_table(b, dev->ifname);
712 device_dump_status(b, dev);
713 blobmsg_close_table(b, c);
719 blobmsg_add_u8(b, "external", dev->external);
720 blobmsg_add_u8(b, "present", dev->present);
721 blobmsg_add_string(b, "type", dev->type->name);
726 blobmsg_add_u8(b, "up", !!dev->active);
727 blobmsg_add_u8(b, "carrier", !!dev->link_active);
729 if (dev->type->dump_info)
730 dev->type->dump_info(dev, b);
732 system_if_dump_info(dev, b);
735 device_merge_settings(dev, &st);
736 if (st.flags & DEV_OPT_MTU)
737 blobmsg_add_u32(b, "mtu", st.mtu);
738 if (st.flags & DEV_OPT_MACADDR)
739 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
740 if (st.flags & DEV_OPT_TXQUEUELEN)
741 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
742 if (st.flags & DEV_OPT_IPV6)
743 blobmsg_add_u8(b, "ipv6", st.ipv6);
744 if (st.flags & DEV_OPT_PROMISC)
745 blobmsg_add_u8(b, "promisc", st.promisc);
746 if (st.flags & DEV_OPT_RPFILTER)
747 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
750 s = blobmsg_open_table(b, "statistics");
751 if (dev->type->dump_stats)
752 dev->type->dump_stats(dev, b);
754 system_if_dump_stats(dev, b);
755 blobmsg_close_table(b, s);