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 },
47 [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
48 [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
51 const struct uci_blob_param_list device_attr_list = {
52 .n_params = __DEV_ATTR_MAX,
56 static int __devlock = 0;
58 void device_lock(void)
63 void device_unlock(void)
67 device_free_unused(NULL);
70 static int set_device_state(struct device *dev, bool state)
73 /* Set ifindex for all devices being enabled so a valid */
74 /* ifindex is in place avoiding possible race conditions */
75 device_set_ifindex(dev, system_if_resolve(dev));
92 simple_device_set_state(struct device *dev, bool state)
97 pdev = dev->parent.dev;
99 pdev = system_if_get_parent(dev);
101 device_add_user(&dev->parent, pdev);
106 ret = device_claim(&dev->parent);
108 device_release(&dev->parent);
113 return set_device_state(dev, state);
116 static struct device *
117 simple_device_create(const char *name, struct blob_attr *attr)
119 struct blob_attr *tb[__DEV_ATTR_MAX];
120 struct device *dev = NULL;
122 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
123 dev = device_get(name, true);
127 dev->set_state = simple_device_set_state;
128 device_init_settings(dev, tb);
133 static void simple_device_free(struct device *dev)
136 device_remove_user(&dev->parent);
140 const struct device_type simple_device_type = {
141 .name = "Network device",
142 .config_params = &device_attr_list,
144 .create = simple_device_create,
145 .check_state = system_if_check,
146 .free = simple_device_free,
150 device_merge_settings(struct device *dev, struct device_settings *n)
152 struct device_settings *os = &dev->orig_settings;
153 struct device_settings *s = &dev->settings;
155 memset(n, 0, sizeof(*n));
156 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
157 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
158 s->txqueuelen : os->txqueuelen;
160 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
162 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
163 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
164 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
165 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
166 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
167 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
168 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
169 s->neigh4reachabletime : os->neigh4reachabletime;
170 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
171 s->neigh6reachabletime : os->neigh6reachabletime;
172 n->flags = s->flags | os->flags;
176 device_init_settings(struct device *dev, struct blob_attr **tb)
178 struct device_settings *s = &dev->settings;
179 struct blob_attr *cur;
180 struct ether_addr *ea;
181 bool disabled = false;
184 if ((cur = tb[DEV_ATTR_ENABLED]))
185 disabled = !blobmsg_get_bool(cur);
187 if ((cur = tb[DEV_ATTR_MTU])) {
188 s->mtu = blobmsg_get_u32(cur);
189 s->flags |= DEV_OPT_MTU;
192 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
193 s->txqueuelen = blobmsg_get_u32(cur);
194 s->flags |= DEV_OPT_TXQUEUELEN;
197 if ((cur = tb[DEV_ATTR_MACADDR])) {
198 ea = ether_aton(blobmsg_data(cur));
200 memcpy(s->macaddr, ea, 6);
201 s->flags |= DEV_OPT_MACADDR;
205 if ((cur = tb[DEV_ATTR_IPV6])) {
206 s->ipv6 = blobmsg_get_bool(cur);
207 s->flags |= DEV_OPT_IPV6;
210 if ((cur = tb[DEV_ATTR_PROMISC])) {
211 s->promisc = blobmsg_get_bool(cur);
212 s->flags |= DEV_OPT_PROMISC;
215 if ((cur = tb[DEV_ATTR_RPFILTER])) {
216 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
217 s->flags |= DEV_OPT_RPFILTER;
219 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
222 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
223 s->acceptlocal = blobmsg_get_bool(cur);
224 s->flags |= DEV_OPT_ACCEPTLOCAL;
227 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
228 s->igmpversion = blobmsg_get_u32(cur);
229 if (s->igmpversion >= 1 && s->igmpversion <= 3)
230 s->flags |= DEV_OPT_IGMPVERSION;
232 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
235 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
236 s->mldversion = blobmsg_get_u32(cur);
237 if (s->mldversion >= 1 && s->mldversion <= 2)
238 s->flags |= DEV_OPT_MLDVERSION;
240 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
243 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
244 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
245 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
248 if ((cur = tb[DEV_ATTR_RPS]))
249 s->rps = blobmsg_get_bool(cur);
253 if ((cur = tb[DEV_ATTR_XPS]))
254 s->xps = blobmsg_get_bool(cur);
258 device_set_disabled(dev, disabled);
261 static void __init dev_init(void)
263 avl_init(&devices, avl_strcmp, true, NULL);
266 static int device_broadcast_cb(void *ctx, struct safe_list *list)
268 struct device_user *dep = container_of(list, struct device_user, list);
271 /* device might have been removed by an earlier callback */
280 void device_broadcast_event(struct device *dev, enum device_event ev)
284 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
285 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
288 int device_claim(struct device_user *dep)
290 struct device *dev = dep->dev;
297 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
298 if (++dev->active != 1)
301 device_broadcast_event(dev, DEV_EVENT_SETUP);
302 ret = dev->set_state(dev, true);
304 device_broadcast_event(dev, DEV_EVENT_UP);
306 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
308 dep->claimed = false;
314 void device_release(struct device_user *dep)
316 struct device *dev = dep->dev;
321 dep->claimed = false;
323 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
324 assert(dev->active >= 0);
329 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
331 dev->set_state(dev, false);
332 device_broadcast_event(dev, DEV_EVENT_DOWN);
335 int device_check_state(struct device *dev)
337 if (!dev->type->check_state)
338 return simple_device_type.check_state(dev);
340 return dev->type->check_state(dev);
343 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
349 strncpy(dev->ifname, name, IFNAMSIZ);
351 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
352 INIT_SAFE_LIST(&dev->users);
353 INIT_SAFE_LIST(&dev->aliases);
357 dev->set_state = set_device_state;
360 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
364 device_init_virtual(dev, type, ifname);
366 dev->avl.key = dev->ifname;
368 ret = avl_insert(&devices, &dev->avl);
372 system_if_clear_state(dev);
373 device_check_state(dev);
374 dev->settings.rps = true;
375 dev->settings.xps = true;
380 static struct device *
381 device_create_default(const char *name, bool external)
385 if (!external && system_if_force_external(name))
388 D(DEVICE, "Create simple device '%s'\n", name);
389 dev = calloc(1, sizeof(*dev));
390 dev->external = external;
391 dev->set_state = simple_device_set_state;
392 device_init(dev, &simple_device_type, name);
393 dev->default_config = true;
398 device_get(const char *name, int create)
402 if (strchr(name, '.'))
403 return get_vlan_device_chain(name, create);
406 return device_alias_get(name + 1);
408 dev = avl_find_element(&devices, name, dev, avl);
410 if (create > 1 && !dev->external) {
411 dev->external = true;
412 device_set_present(dev, true);
420 return device_create_default(name, create > 1);
424 device_delete(struct device *dev)
429 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
430 avl_delete(&devices, &dev->avl);
434 static int device_cleanup_cb(void *ctx, struct safe_list *list)
436 struct device_user *dep = container_of(list, struct device_user, list);
438 dep->cb(dep, DEV_EVENT_REMOVE);
444 void device_cleanup(struct device *dev)
446 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
447 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
448 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
452 static void __device_set_present(struct device *dev, bool state)
454 if (dev->present == state)
457 dev->present = state;
458 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
462 device_refresh_present(struct device *dev)
464 bool state = dev->sys_present;
466 if (dev->disabled || dev->deferred)
469 __device_set_present(dev, state);
472 void device_set_present(struct device *dev, bool state)
474 if (dev->sys_present == state)
477 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
478 dev->sys_present = state;
479 device_refresh_present(dev);
482 void device_set_link(struct device *dev, bool state)
484 if (dev->link_active == state)
487 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
489 dev->link_active = state;
490 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
493 void device_set_ifindex(struct device *dev, int ifindex)
495 if (dev->ifindex == ifindex)
498 dev->ifindex = ifindex;
499 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
502 static int device_refcount(struct device *dev)
504 struct list_head *list;
507 list_for_each(list, &dev->users.list)
510 list_for_each(list, &dev->aliases.list)
516 void device_add_user(struct device_user *dep, struct device *dev)
518 struct safe_list *head;
524 device_remove_user(dep);
532 head = &dev->aliases;
536 safe_list_add(&dep->list, head);
537 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
539 if (dep->cb && dev->present) {
540 dep->cb(dep, DEV_EVENT_ADD);
542 dep->cb(dep, DEV_EVENT_UP);
544 if (dev->link_active)
545 dep->cb(dep, DEV_EVENT_LINK_UP);
550 device_free(struct device *dev)
555 dev->type->free(dev);
560 __device_free_unused(struct device *dev)
562 if (!safe_list_empty(&dev->users) ||
563 !safe_list_empty(&dev->aliases) ||
564 dev->current_config || __devlock)
570 void device_remove_user(struct device_user *dep)
572 struct device *dev = dep->dev;
577 dep->hotplug = false;
581 safe_list_del(&dep->list);
583 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
584 __device_free_unused(dev);
588 device_free_unused(struct device *dev)
593 return __device_free_unused(dev);
595 avl_for_each_element_safe(&devices, dev, avl, tmp)
596 __device_free_unused(dev);
600 device_init_pending(void)
602 struct device *dev, *tmp;
604 avl_for_each_element_safe(&devices, dev, avl, tmp) {
605 if (!dev->config_pending)
608 dev->type->config_init(dev);
609 dev->config_pending = false;
613 static enum dev_change_type
614 device_set_config(struct device *dev, const struct device_type *type,
615 struct blob_attr *attr)
617 struct blob_attr *tb[__DEV_ATTR_MAX];
618 const struct uci_blob_param_list *cfg = type->config_params;
620 if (type != dev->type)
621 return DEV_CONFIG_RECREATE;
623 if (dev->type->reload)
624 return dev->type->reload(dev, attr);
626 if (uci_blob_check_equal(dev->config, attr, cfg))
627 return DEV_CONFIG_NO_CHANGE;
629 if (cfg == &device_attr_list) {
630 memset(tb, 0, sizeof(tb));
633 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
634 blob_data(attr), blob_len(attr));
636 device_init_settings(dev, tb);
637 return DEV_CONFIG_RESTART;
639 return DEV_CONFIG_RECREATE;
643 device_apply_config(struct device *dev, const struct device_type *type,
644 struct blob_attr *config)
646 enum dev_change_type change;
648 change = device_set_config(dev, type, config);
650 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
651 change = DEV_CONFIG_APPLIED;
655 case DEV_CONFIG_RESTART:
656 case DEV_CONFIG_APPLIED:
657 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
658 config = blob_memdup(config);
660 dev->config = config;
661 if (change == DEV_CONFIG_RESTART && dev->present) {
662 device_set_present(dev, false);
663 if (dev->active && !dev->external) {
664 dev->set_state(dev, false);
665 dev->set_state(dev, true);
667 device_set_present(dev, true);
670 case DEV_CONFIG_NO_CHANGE:
671 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
673 case DEV_CONFIG_RECREATE:
681 device_replace(struct device *dev, struct device *odev)
683 struct device_user *dep, *tmp;
684 bool present = odev->present;
687 device_set_present(odev, false);
689 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
691 safe_list_del(&dep->list);
692 safe_list_add(&dep->list, &dev->users);
698 device_set_present(dev, true);
702 device_reset_config(void)
706 avl_for_each_element(&devices, dev, avl)
707 dev->current_config = false;
711 device_reset_old(void)
713 struct device *dev, *tmp, *ndev;
715 avl_for_each_element_safe(&devices, dev, avl, tmp) {
716 if (dev->current_config || dev->default_config)
719 if (dev->type != &simple_device_type)
722 ndev = device_create_default(dev->ifname, dev->external);
723 device_replace(ndev, dev);
728 device_create(const char *name, const struct device_type *type,
729 struct blob_attr *config)
731 struct device *odev = NULL, *dev;
732 enum dev_change_type change;
734 odev = device_get(name, false);
736 odev->current_config = true;
737 change = device_apply_config(odev, type, config);
739 case DEV_CONFIG_RECREATE:
740 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
747 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
749 config = blob_memdup(config);
753 dev = type->create(name, config);
757 dev->current_config = true;
758 dev->config = config;
760 device_replace(dev, odev);
762 if (!config_init && dev->config_pending)
763 type->config_init(dev);
769 device_dump_status(struct blob_buf *b, struct device *dev)
771 struct device_settings st;
775 avl_for_each_element(&devices, dev, avl) {
778 c = blobmsg_open_table(b, dev->ifname);
779 device_dump_status(b, dev);
780 blobmsg_close_table(b, c);
786 blobmsg_add_u8(b, "external", dev->external);
787 blobmsg_add_u8(b, "present", dev->present);
788 blobmsg_add_string(b, "type", dev->type->name);
793 blobmsg_add_u8(b, "up", !!dev->active);
794 blobmsg_add_u8(b, "carrier", !!dev->link_active);
796 if (dev->type->dump_info)
797 dev->type->dump_info(dev, b);
799 system_if_dump_info(dev, b);
802 device_merge_settings(dev, &st);
803 if (st.flags & DEV_OPT_MTU)
804 blobmsg_add_u32(b, "mtu", st.mtu);
805 if (st.flags & DEV_OPT_MACADDR)
806 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
807 if (st.flags & DEV_OPT_TXQUEUELEN)
808 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
809 if (st.flags & DEV_OPT_IPV6)
810 blobmsg_add_u8(b, "ipv6", st.ipv6);
811 if (st.flags & DEV_OPT_PROMISC)
812 blobmsg_add_u8(b, "promisc", st.promisc);
813 if (st.flags & DEV_OPT_RPFILTER)
814 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
815 if (st.flags & DEV_OPT_ACCEPTLOCAL)
816 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
817 if (st.flags & DEV_OPT_IGMPVERSION)
818 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
819 if (st.flags & DEV_OPT_MLDVERSION)
820 blobmsg_add_u32(b, "mldversion", st.mldversion);
821 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
822 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
823 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
827 s = blobmsg_open_table(b, "statistics");
828 if (dev->type->dump_stats)
829 dev->type->dump_stats(dev, b);
831 system_if_dump_stats(dev, b);
832 blobmsg_close_table(b, s);