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 },
43 [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
44 [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
45 [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
46 [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
49 const struct uci_blob_param_list device_attr_list = {
50 .n_params = __DEV_ATTR_MAX,
54 static int __devlock = 0;
56 void device_lock(void)
61 void device_unlock(void)
65 device_free_unused(NULL);
68 static int set_device_state(struct device *dev, bool state)
71 /* Set ifindex for all devices being enabled so a valid */
72 /* ifindex is in place avoiding possible race conditions */
73 device_set_ifindex(dev, system_if_resolve(dev));
90 simple_device_set_state(struct device *dev, bool state)
95 pdev = dev->parent.dev;
97 pdev = system_if_get_parent(dev);
99 device_add_user(&dev->parent, pdev);
104 ret = device_claim(&dev->parent);
106 device_release(&dev->parent);
111 return set_device_state(dev, state);
114 static struct device *
115 simple_device_create(const char *name, struct blob_attr *attr)
117 struct blob_attr *tb[__DEV_ATTR_MAX];
118 struct device *dev = NULL;
120 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
121 dev = device_get(name, true);
125 dev->set_state = simple_device_set_state;
126 device_init_settings(dev, tb);
131 static void simple_device_free(struct device *dev)
134 device_remove_user(&dev->parent);
138 const struct device_type simple_device_type = {
139 .name = "Network device",
140 .config_params = &device_attr_list,
142 .create = simple_device_create,
143 .check_state = system_if_check,
144 .free = simple_device_free,
148 device_merge_settings(struct device *dev, struct device_settings *n)
150 struct device_settings *os = &dev->orig_settings;
151 struct device_settings *s = &dev->settings;
153 memset(n, 0, sizeof(*n));
154 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
155 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
156 s->txqueuelen : os->txqueuelen;
158 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
160 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
161 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
162 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
163 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
164 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
165 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
166 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
167 s->neigh4reachabletime : os->neigh4reachabletime;
168 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
169 s->neigh6reachabletime : os->neigh6reachabletime;
170 n->flags = s->flags | os->flags;
174 device_init_settings(struct device *dev, struct blob_attr **tb)
176 struct device_settings *s = &dev->settings;
177 struct blob_attr *cur;
178 struct ether_addr *ea;
179 bool disabled = false;
182 if ((cur = tb[DEV_ATTR_ENABLED]))
183 disabled = !blobmsg_get_bool(cur);
185 if ((cur = tb[DEV_ATTR_MTU])) {
186 s->mtu = blobmsg_get_u32(cur);
187 s->flags |= DEV_OPT_MTU;
190 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
191 s->txqueuelen = blobmsg_get_u32(cur);
192 s->flags |= DEV_OPT_TXQUEUELEN;
195 if ((cur = tb[DEV_ATTR_MACADDR])) {
196 ea = ether_aton(blobmsg_data(cur));
198 memcpy(s->macaddr, ea, 6);
199 s->flags |= DEV_OPT_MACADDR;
203 if ((cur = tb[DEV_ATTR_IPV6])) {
204 s->ipv6 = blobmsg_get_bool(cur);
205 s->flags |= DEV_OPT_IPV6;
208 if ((cur = tb[DEV_ATTR_PROMISC])) {
209 s->promisc = blobmsg_get_bool(cur);
210 s->flags |= DEV_OPT_PROMISC;
213 if ((cur = tb[DEV_ATTR_RPFILTER])) {
214 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
215 s->flags |= DEV_OPT_RPFILTER;
217 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
220 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
221 s->acceptlocal = blobmsg_get_bool(cur);
222 s->flags |= DEV_OPT_ACCEPTLOCAL;
225 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
226 s->igmpversion = blobmsg_get_u32(cur);
227 if (s->igmpversion >= 1 && s->igmpversion <= 3)
228 s->flags |= DEV_OPT_IGMPVERSION;
230 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
233 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
234 s->mldversion = blobmsg_get_u32(cur);
235 if (s->mldversion >= 1 && s->mldversion <= 2)
236 s->flags |= DEV_OPT_MLDVERSION;
238 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
241 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
242 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
243 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
246 device_set_disabled(dev, disabled);
249 static void __init dev_init(void)
251 avl_init(&devices, avl_strcmp, true, NULL);
254 static int device_broadcast_cb(void *ctx, struct safe_list *list)
256 struct device_user *dep = container_of(list, struct device_user, list);
259 /* device might have been removed by an earlier callback */
268 void device_broadcast_event(struct device *dev, enum device_event ev)
272 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
273 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
276 int device_claim(struct device_user *dep)
278 struct device *dev = dep->dev;
285 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
286 if (++dev->active != 1)
289 device_broadcast_event(dev, DEV_EVENT_SETUP);
290 ret = dev->set_state(dev, true);
292 device_broadcast_event(dev, DEV_EVENT_UP);
294 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
296 dep->claimed = false;
302 void device_release(struct device_user *dep)
304 struct device *dev = dep->dev;
309 dep->claimed = false;
311 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
312 assert(dev->active >= 0);
317 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
319 dev->set_state(dev, false);
320 device_broadcast_event(dev, DEV_EVENT_DOWN);
323 int device_check_state(struct device *dev)
325 if (!dev->type->check_state)
326 return simple_device_type.check_state(dev);
328 return dev->type->check_state(dev);
331 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
337 strncpy(dev->ifname, name, IFNAMSIZ);
339 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
340 INIT_SAFE_LIST(&dev->users);
341 INIT_SAFE_LIST(&dev->aliases);
345 dev->set_state = set_device_state;
348 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
352 device_init_virtual(dev, type, ifname);
354 dev->avl.key = dev->ifname;
356 ret = avl_insert(&devices, &dev->avl);
360 system_if_clear_state(dev);
361 device_check_state(dev);
366 static struct device *
367 device_create_default(const char *name, bool external)
371 if (!external && system_if_force_external(name))
374 D(DEVICE, "Create simple device '%s'\n", name);
375 dev = calloc(1, sizeof(*dev));
376 dev->external = external;
377 dev->set_state = simple_device_set_state;
378 device_init(dev, &simple_device_type, name);
379 dev->default_config = true;
384 device_get(const char *name, int create)
388 if (strchr(name, '.'))
389 return get_vlan_device_chain(name, create);
392 return device_alias_get(name + 1);
394 dev = avl_find_element(&devices, name, dev, avl);
396 if (create > 1 && !dev->external) {
397 dev->external = true;
398 device_set_present(dev, true);
406 return device_create_default(name, create > 1);
410 device_delete(struct device *dev)
415 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
416 avl_delete(&devices, &dev->avl);
420 static int device_cleanup_cb(void *ctx, struct safe_list *list)
422 struct device_user *dep = container_of(list, struct device_user, list);
424 dep->cb(dep, DEV_EVENT_REMOVE);
430 void device_cleanup(struct device *dev)
432 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
433 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
434 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
438 static void __device_set_present(struct device *dev, bool state)
440 if (dev->present == state)
443 dev->present = state;
444 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
448 device_refresh_present(struct device *dev)
450 bool state = dev->sys_present;
452 if (dev->disabled || dev->deferred)
455 __device_set_present(dev, state);
458 void device_set_present(struct device *dev, bool state)
460 if (dev->sys_present == state)
463 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
464 dev->sys_present = state;
465 device_refresh_present(dev);
468 void device_set_link(struct device *dev, bool state)
470 if (dev->link_active == state)
473 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
475 dev->link_active = state;
476 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
479 void device_set_ifindex(struct device *dev, int ifindex)
481 if (dev->ifindex == ifindex)
484 dev->ifindex = ifindex;
485 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
488 static int device_refcount(struct device *dev)
490 struct list_head *list;
493 list_for_each(list, &dev->users.list)
496 list_for_each(list, &dev->aliases.list)
502 void device_add_user(struct device_user *dep, struct device *dev)
504 struct safe_list *head;
510 device_remove_user(dep);
518 head = &dev->aliases;
522 safe_list_add(&dep->list, head);
523 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
525 if (dep->cb && dev->present) {
526 dep->cb(dep, DEV_EVENT_ADD);
528 dep->cb(dep, DEV_EVENT_UP);
530 if (dev->link_active)
531 dep->cb(dep, DEV_EVENT_LINK_UP);
536 device_free(struct device *dev)
541 dev->type->free(dev);
546 __device_free_unused(struct device *dev)
548 if (!safe_list_empty(&dev->users) ||
549 !safe_list_empty(&dev->aliases) ||
550 dev->current_config || __devlock)
556 void device_remove_user(struct device_user *dep)
558 struct device *dev = dep->dev;
563 dep->hotplug = false;
567 safe_list_del(&dep->list);
569 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
570 __device_free_unused(dev);
574 device_free_unused(struct device *dev)
579 return __device_free_unused(dev);
581 avl_for_each_element_safe(&devices, dev, avl, tmp)
582 __device_free_unused(dev);
586 device_init_pending(void)
588 struct device *dev, *tmp;
590 avl_for_each_element_safe(&devices, dev, avl, tmp) {
591 if (!dev->config_pending)
594 dev->type->config_init(dev);
595 dev->config_pending = false;
599 static enum dev_change_type
600 device_set_config(struct device *dev, const struct device_type *type,
601 struct blob_attr *attr)
603 struct blob_attr *tb[__DEV_ATTR_MAX];
604 const struct uci_blob_param_list *cfg = type->config_params;
606 if (type != dev->type)
607 return DEV_CONFIG_RECREATE;
609 if (dev->type->reload)
610 return dev->type->reload(dev, attr);
612 if (uci_blob_check_equal(dev->config, attr, cfg))
613 return DEV_CONFIG_NO_CHANGE;
615 if (cfg == &device_attr_list) {
616 memset(tb, 0, sizeof(tb));
619 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
620 blob_data(attr), blob_len(attr));
622 device_init_settings(dev, tb);
623 return DEV_CONFIG_RESTART;
625 return DEV_CONFIG_RECREATE;
629 device_apply_config(struct device *dev, const struct device_type *type,
630 struct blob_attr *config)
632 enum dev_change_type change;
634 change = device_set_config(dev, type, config);
636 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
637 change = DEV_CONFIG_APPLIED;
641 case DEV_CONFIG_RESTART:
642 case DEV_CONFIG_APPLIED:
643 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
644 config = blob_memdup(config);
646 dev->config = config;
647 if (change == DEV_CONFIG_RESTART && dev->present) {
648 device_set_present(dev, false);
649 if (dev->active && !dev->external) {
650 dev->set_state(dev, false);
651 dev->set_state(dev, true);
653 device_set_present(dev, true);
656 case DEV_CONFIG_NO_CHANGE:
657 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
659 case DEV_CONFIG_RECREATE:
667 device_replace(struct device *dev, struct device *odev)
669 struct device_user *dep, *tmp;
670 bool present = odev->present;
673 device_set_present(odev, false);
675 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
677 safe_list_del(&dep->list);
678 safe_list_add(&dep->list, &dev->users);
684 device_set_present(dev, true);
688 device_reset_config(void)
692 avl_for_each_element(&devices, dev, avl)
693 dev->current_config = false;
697 device_reset_old(void)
699 struct device *dev, *tmp, *ndev;
701 avl_for_each_element_safe(&devices, dev, avl, tmp) {
702 if (dev->current_config || dev->default_config)
705 if (dev->type != &simple_device_type)
708 ndev = device_create_default(dev->ifname, dev->external);
709 device_replace(ndev, dev);
714 device_create(const char *name, const struct device_type *type,
715 struct blob_attr *config)
717 struct device *odev = NULL, *dev;
718 enum dev_change_type change;
720 odev = device_get(name, false);
722 odev->current_config = true;
723 change = device_apply_config(odev, type, config);
725 case DEV_CONFIG_RECREATE:
726 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
733 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
735 config = blob_memdup(config);
739 dev = type->create(name, config);
743 dev->current_config = true;
744 dev->config = config;
746 device_replace(dev, odev);
748 if (!config_init && dev->config_pending)
749 type->config_init(dev);
755 device_dump_status(struct blob_buf *b, struct device *dev)
757 struct device_settings st;
761 avl_for_each_element(&devices, dev, avl) {
764 c = blobmsg_open_table(b, dev->ifname);
765 device_dump_status(b, dev);
766 blobmsg_close_table(b, c);
772 blobmsg_add_u8(b, "external", dev->external);
773 blobmsg_add_u8(b, "present", dev->present);
774 blobmsg_add_string(b, "type", dev->type->name);
779 blobmsg_add_u8(b, "up", !!dev->active);
780 blobmsg_add_u8(b, "carrier", !!dev->link_active);
782 if (dev->type->dump_info)
783 dev->type->dump_info(dev, b);
785 system_if_dump_info(dev, b);
788 device_merge_settings(dev, &st);
789 if (st.flags & DEV_OPT_MTU)
790 blobmsg_add_u32(b, "mtu", st.mtu);
791 if (st.flags & DEV_OPT_MACADDR)
792 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
793 if (st.flags & DEV_OPT_TXQUEUELEN)
794 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
795 if (st.flags & DEV_OPT_IPV6)
796 blobmsg_add_u8(b, "ipv6", st.ipv6);
797 if (st.flags & DEV_OPT_PROMISC)
798 blobmsg_add_u8(b, "promisc", st.promisc);
799 if (st.flags & DEV_OPT_RPFILTER)
800 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
801 if (st.flags & DEV_OPT_ACCEPTLOCAL)
802 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
803 if (st.flags & DEV_OPT_IGMPVERSION)
804 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
805 if (st.flags & DEV_OPT_MLDVERSION)
806 blobmsg_add_u32(b, "mldversion", st.mldversion);
807 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
808 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
809 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
813 s = blobmsg_open_table(b, "statistics");
814 if (dev->type->dump_stats)
815 dev->type->dump_stats(dev, b);
817 system_if_dump_stats(dev, b);
818 blobmsg_close_table(b, s);