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 bool default_ps = true;
34 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
35 [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
36 [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
37 [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
38 [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
39 [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
40 [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
41 [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
42 [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
43 [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
44 [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
45 [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
46 [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
47 [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
48 [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
49 [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
50 [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
51 [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
54 const struct uci_blob_param_list device_attr_list = {
55 .n_params = __DEV_ATTR_MAX,
59 static int __devlock = 0;
61 void device_lock(void)
66 void device_unlock(void)
70 device_free_unused(NULL);
73 static int set_device_state(struct device *dev, bool state)
76 /* Set ifindex for all devices being enabled so a valid */
77 /* ifindex is in place avoiding possible race conditions */
78 device_set_ifindex(dev, system_if_resolve(dev));
95 simple_device_set_state(struct device *dev, bool state)
100 pdev = dev->parent.dev;
101 if (state && !pdev) {
102 pdev = system_if_get_parent(dev);
104 device_add_user(&dev->parent, pdev);
109 ret = device_claim(&dev->parent);
111 device_release(&dev->parent);
116 return set_device_state(dev, state);
119 static struct device *
120 simple_device_create(const char *name, struct blob_attr *attr)
122 struct blob_attr *tb[__DEV_ATTR_MAX];
123 struct device *dev = NULL;
125 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
126 dev = device_get(name, true);
130 dev->set_state = simple_device_set_state;
131 device_init_settings(dev, tb);
136 static void simple_device_free(struct device *dev)
139 device_remove_user(&dev->parent);
143 const struct device_type simple_device_type = {
144 .name = "Network device",
145 .config_params = &device_attr_list,
147 .create = simple_device_create,
148 .check_state = system_if_check,
149 .free = simple_device_free,
153 device_merge_settings(struct device *dev, struct device_settings *n)
155 struct device_settings *os = &dev->orig_settings;
156 struct device_settings *s = &dev->settings;
158 memset(n, 0, sizeof(*n));
159 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
160 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
161 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
162 s->txqueuelen : os->txqueuelen;
164 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
166 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
167 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
168 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
169 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
170 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
171 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
172 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
173 s->neigh4reachabletime : os->neigh4reachabletime;
174 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
175 s->neigh6reachabletime : os->neigh6reachabletime;
176 n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
177 s->dadtransmits : os->dadtransmits;
178 n->multicast_to_unicast = s->multicast_to_unicast;
179 n->flags = s->flags | os->flags;
183 device_init_settings(struct device *dev, struct blob_attr **tb)
185 struct device_settings *s = &dev->settings;
186 struct blob_attr *cur;
187 struct ether_addr *ea;
188 bool disabled = false;
191 if ((cur = tb[DEV_ATTR_ENABLED]))
192 disabled = !blobmsg_get_bool(cur);
194 if ((cur = tb[DEV_ATTR_MTU])) {
195 s->mtu = blobmsg_get_u32(cur);
196 s->flags |= DEV_OPT_MTU;
199 if ((cur = tb[DEV_ATTR_MTU6])) {
200 s->mtu6 = blobmsg_get_u32(cur);
201 s->flags |= DEV_OPT_MTU6;
204 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
205 s->txqueuelen = blobmsg_get_u32(cur);
206 s->flags |= DEV_OPT_TXQUEUELEN;
209 if ((cur = tb[DEV_ATTR_MACADDR])) {
210 ea = ether_aton(blobmsg_data(cur));
212 memcpy(s->macaddr, ea, 6);
213 s->flags |= DEV_OPT_MACADDR;
217 if ((cur = tb[DEV_ATTR_IPV6])) {
218 s->ipv6 = blobmsg_get_bool(cur);
219 s->flags |= DEV_OPT_IPV6;
222 if ((cur = tb[DEV_ATTR_PROMISC])) {
223 s->promisc = blobmsg_get_bool(cur);
224 s->flags |= DEV_OPT_PROMISC;
227 if ((cur = tb[DEV_ATTR_RPFILTER])) {
228 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
229 s->flags |= DEV_OPT_RPFILTER;
231 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
234 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
235 s->acceptlocal = blobmsg_get_bool(cur);
236 s->flags |= DEV_OPT_ACCEPTLOCAL;
239 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
240 s->igmpversion = blobmsg_get_u32(cur);
241 if (s->igmpversion >= 1 && s->igmpversion <= 3)
242 s->flags |= DEV_OPT_IGMPVERSION;
244 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
247 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
248 s->mldversion = blobmsg_get_u32(cur);
249 if (s->mldversion >= 1 && s->mldversion <= 2)
250 s->flags |= DEV_OPT_MLDVERSION;
252 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
255 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
256 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
257 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
260 if ((cur = tb[DEV_ATTR_RPS])) {
261 s->rps = blobmsg_get_bool(cur);
262 s->flags |= DEV_OPT_RPS;
267 if ((cur = tb[DEV_ATTR_XPS])) {
268 s->xps = blobmsg_get_bool(cur);
269 s->flags |= DEV_OPT_XPS;
274 if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
275 s->dadtransmits = blobmsg_get_u32(cur);
276 s->flags |= DEV_OPT_DADTRANSMITS;
279 if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
280 s->multicast_to_unicast = blobmsg_get_bool(cur);
281 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
284 device_set_disabled(dev, disabled);
287 static void __init dev_init(void)
289 avl_init(&devices, avl_strcmp, true, NULL);
292 static int device_broadcast_cb(void *ctx, struct safe_list *list)
294 struct device_user *dep = container_of(list, struct device_user, list);
297 /* device might have been removed by an earlier callback */
306 void device_broadcast_event(struct device *dev, enum device_event ev)
310 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
311 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
314 int device_claim(struct device_user *dep)
316 struct device *dev = dep->dev;
323 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
324 if (++dev->active != 1)
327 device_broadcast_event(dev, DEV_EVENT_SETUP);
328 ret = dev->set_state(dev, true);
330 device_broadcast_event(dev, DEV_EVENT_UP);
332 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
334 dep->claimed = false;
340 void device_release(struct device_user *dep)
342 struct device *dev = dep->dev;
347 dep->claimed = false;
349 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
350 assert(dev->active >= 0);
355 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
357 dev->set_state(dev, false);
358 device_broadcast_event(dev, DEV_EVENT_DOWN);
361 int device_check_state(struct device *dev)
363 if (!dev->type->check_state)
364 return simple_device_type.check_state(dev);
366 return dev->type->check_state(dev);
369 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
375 strncpy(dev->ifname, name, IFNAMSIZ);
377 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
378 INIT_SAFE_LIST(&dev->users);
379 INIT_SAFE_LIST(&dev->aliases);
383 dev->set_state = set_device_state;
386 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
390 device_init_virtual(dev, type, ifname);
392 dev->avl.key = dev->ifname;
394 ret = avl_insert(&devices, &dev->avl);
398 system_if_clear_state(dev);
399 device_check_state(dev);
400 dev->settings.rps = default_ps;
401 dev->settings.xps = default_ps;
406 static struct device *
407 device_create_default(const char *name, bool external)
411 if (!external && system_if_force_external(name))
414 D(DEVICE, "Create simple device '%s'\n", name);
415 dev = calloc(1, sizeof(*dev));
416 dev->external = external;
417 dev->set_state = simple_device_set_state;
418 device_init(dev, &simple_device_type, name);
419 dev->default_config = true;
421 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
426 device_get(const char *name, int create)
430 if (strchr(name, '.'))
431 return get_vlan_device_chain(name, create);
434 return device_alias_get(name + 1);
436 dev = avl_find_element(&devices, name, dev, avl);
438 if (create > 1 && !dev->external) {
439 dev->external = true;
440 device_set_present(dev, true);
448 return device_create_default(name, create > 1);
452 device_delete(struct device *dev)
457 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
458 avl_delete(&devices, &dev->avl);
462 static int device_cleanup_cb(void *ctx, struct safe_list *list)
464 struct device_user *dep = container_of(list, struct device_user, list);
466 dep->cb(dep, DEV_EVENT_REMOVE);
472 void device_cleanup(struct device *dev)
474 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
475 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
476 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
480 static void __device_set_present(struct device *dev, bool state)
482 if (dev->present == state)
485 dev->present = state;
486 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
490 device_refresh_present(struct device *dev)
492 bool state = dev->sys_present;
494 if (dev->disabled || dev->deferred)
497 __device_set_present(dev, state);
500 void device_set_present(struct device *dev, bool state)
502 if (dev->sys_present == state)
505 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
506 dev->sys_present = state;
507 device_refresh_present(dev);
510 void device_set_link(struct device *dev, bool state)
512 if (dev->link_active == state)
515 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
517 dev->link_active = state;
518 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
521 void device_set_ifindex(struct device *dev, int ifindex)
523 if (dev->ifindex == ifindex)
526 dev->ifindex = ifindex;
527 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
530 static int device_refcount(struct device *dev)
532 struct list_head *list;
535 list_for_each(list, &dev->users.list)
538 list_for_each(list, &dev->aliases.list)
545 __device_add_user(struct device_user *dep, struct device *dev)
547 struct safe_list *head;
552 head = &dev->aliases;
556 safe_list_add(&dep->list, head);
557 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
559 if (dep->cb && dev->present) {
560 dep->cb(dep, DEV_EVENT_ADD);
562 dep->cb(dep, DEV_EVENT_UP);
564 if (dev->link_active)
565 dep->cb(dep, DEV_EVENT_LINK_UP);
569 void device_add_user(struct device_user *dep, struct device *dev)
575 device_remove_user(dep);
580 __device_add_user(dep, dev);
584 device_free(struct device *dev)
589 dev->type->free(dev);
594 __device_free_unused(struct device *dev)
596 if (!safe_list_empty(&dev->users) ||
597 !safe_list_empty(&dev->aliases) ||
598 dev->current_config || __devlock)
604 void device_remove_user(struct device_user *dep)
606 struct device *dev = dep->dev;
611 dep->hotplug = false;
615 safe_list_del(&dep->list);
617 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
618 __device_free_unused(dev);
622 device_free_unused(struct device *dev)
627 return __device_free_unused(dev);
629 avl_for_each_element_safe(&devices, dev, avl, tmp)
630 __device_free_unused(dev);
634 device_init_pending(void)
636 struct device *dev, *tmp;
638 avl_for_each_element_safe(&devices, dev, avl, tmp) {
639 if (!dev->config_pending)
642 dev->type->config_init(dev);
643 dev->config_pending = false;
647 static enum dev_change_type
648 device_set_config(struct device *dev, const struct device_type *type,
649 struct blob_attr *attr)
651 struct blob_attr *tb[__DEV_ATTR_MAX];
652 const struct uci_blob_param_list *cfg = type->config_params;
654 if (type != dev->type)
655 return DEV_CONFIG_RECREATE;
657 if (dev->type->reload)
658 return dev->type->reload(dev, attr);
660 if (uci_blob_check_equal(dev->config, attr, cfg))
661 return DEV_CONFIG_NO_CHANGE;
663 if (cfg == &device_attr_list) {
664 memset(tb, 0, sizeof(tb));
667 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
668 blob_data(attr), blob_len(attr));
670 device_init_settings(dev, tb);
671 return DEV_CONFIG_RESTART;
673 return DEV_CONFIG_RECREATE;
677 device_apply_config(struct device *dev, const struct device_type *type,
678 struct blob_attr *config)
680 enum dev_change_type change;
682 change = device_set_config(dev, type, config);
684 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
685 change = DEV_CONFIG_APPLIED;
689 case DEV_CONFIG_RESTART:
690 case DEV_CONFIG_APPLIED:
691 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
692 config = blob_memdup(config);
694 dev->config = config;
695 if (change == DEV_CONFIG_RESTART && dev->present) {
696 device_set_present(dev, false);
697 if (dev->active && !dev->external) {
698 dev->set_state(dev, false);
699 dev->set_state(dev, true);
701 device_set_present(dev, true);
704 case DEV_CONFIG_NO_CHANGE:
705 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
707 case DEV_CONFIG_RECREATE:
715 device_replace(struct device *dev, struct device *odev)
717 struct device_user *dep, *tmp;
721 device_set_present(odev, false);
723 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
725 safe_list_del(&dep->list);
726 __device_add_user(dep, dev);
734 device_reset_config(void)
738 avl_for_each_element(&devices, dev, avl)
739 dev->current_config = false;
743 device_reset_old(void)
745 struct device *dev, *tmp, *ndev;
747 avl_for_each_element_safe(&devices, dev, avl, tmp) {
748 if (dev->current_config || dev->default_config)
751 if (dev->type != &simple_device_type)
754 ndev = device_create_default(dev->ifname, dev->external);
758 device_replace(ndev, dev);
763 device_set_default_ps(bool state)
767 if (state == default_ps)
772 avl_for_each_element(&devices, dev, avl) {
773 struct device_settings *s = &dev->settings;
774 unsigned int apply_mask = 0;
776 if (!(s->flags & DEV_OPT_RPS)) {
778 apply_mask |= DEV_OPT_RPS;
781 if (!(s->flags & DEV_OPT_XPS)) {
783 apply_mask |= DEV_OPT_XPS;
789 if (!(dev->external || (dev->present && dev->active)) ||
793 system_if_apply_settings(dev, s, apply_mask);
798 device_create(const char *name, const struct device_type *type,
799 struct blob_attr *config)
801 struct device *odev = NULL, *dev;
802 enum dev_change_type change;
804 odev = device_get(name, false);
806 odev->current_config = true;
807 change = device_apply_config(odev, type, config);
809 case DEV_CONFIG_RECREATE:
810 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
817 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
819 config = blob_memdup(config);
823 dev = type->create(name, config);
827 dev->current_config = true;
828 dev->config = config;
830 device_replace(dev, odev);
832 if (!config_init && dev->config_pending) {
833 type->config_init(dev);
834 dev->config_pending = false;
841 device_dump_status(struct blob_buf *b, struct device *dev)
843 struct device_settings st;
847 avl_for_each_element(&devices, dev, avl) {
850 c = blobmsg_open_table(b, dev->ifname);
851 device_dump_status(b, dev);
852 blobmsg_close_table(b, c);
858 blobmsg_add_u8(b, "external", dev->external);
859 blobmsg_add_u8(b, "present", dev->present);
860 blobmsg_add_string(b, "type", dev->type->name);
865 blobmsg_add_u8(b, "up", !!dev->active);
866 blobmsg_add_u8(b, "carrier", !!dev->link_active);
868 if (dev->type->dump_info)
869 dev->type->dump_info(dev, b);
871 system_if_dump_info(dev, b);
874 device_merge_settings(dev, &st);
875 if (st.flags & DEV_OPT_MTU)
876 blobmsg_add_u32(b, "mtu", st.mtu);
877 if (st.flags & DEV_OPT_MTU6)
878 blobmsg_add_u32(b, "mtu6", st.mtu6);
879 if (st.flags & DEV_OPT_MACADDR)
880 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
881 if (st.flags & DEV_OPT_TXQUEUELEN)
882 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
883 if (st.flags & DEV_OPT_IPV6)
884 blobmsg_add_u8(b, "ipv6", st.ipv6);
885 if (st.flags & DEV_OPT_PROMISC)
886 blobmsg_add_u8(b, "promisc", st.promisc);
887 if (st.flags & DEV_OPT_RPFILTER)
888 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
889 if (st.flags & DEV_OPT_ACCEPTLOCAL)
890 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
891 if (st.flags & DEV_OPT_IGMPVERSION)
892 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
893 if (st.flags & DEV_OPT_MLDVERSION)
894 blobmsg_add_u32(b, "mldversion", st.mldversion);
895 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
896 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
897 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
899 if (st.flags & DEV_OPT_DADTRANSMITS)
900 blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
901 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
902 blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
905 s = blobmsg_open_table(b, "statistics");
906 if (dev->type->dump_stats)
907 dev->type->dump_stats(dev, b);
909 system_if_dump_stats(dev, b);
910 blobmsg_close_table(b, s);