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 },
53 const struct uci_blob_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)
75 /* Set ifindex for all devices being enabled so a valid */
76 /* ifindex is in place avoiding possible race conditions */
77 device_set_ifindex(dev, system_if_resolve(dev));
94 simple_device_set_state(struct device *dev, bool state)
99 pdev = dev->parent.dev;
100 if (state && !pdev) {
101 pdev = system_if_get_parent(dev);
103 device_add_user(&dev->parent, pdev);
108 ret = device_claim(&dev->parent);
110 device_release(&dev->parent);
115 return set_device_state(dev, state);
118 static struct device *
119 simple_device_create(const char *name, struct blob_attr *attr)
121 struct blob_attr *tb[__DEV_ATTR_MAX];
122 struct device *dev = NULL;
124 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
125 dev = device_get(name, true);
129 dev->set_state = simple_device_set_state;
130 device_init_settings(dev, tb);
135 static void simple_device_free(struct device *dev)
138 device_remove_user(&dev->parent);
142 const struct device_type simple_device_type = {
143 .name = "Network device",
144 .config_params = &device_attr_list,
146 .create = simple_device_create,
147 .check_state = system_if_check,
148 .free = simple_device_free,
152 device_merge_settings(struct device *dev, struct device_settings *n)
154 struct device_settings *os = &dev->orig_settings;
155 struct device_settings *s = &dev->settings;
157 memset(n, 0, sizeof(*n));
158 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
159 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
160 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
161 s->txqueuelen : os->txqueuelen;
163 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
165 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
166 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
167 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
168 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
169 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
170 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
171 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
172 s->neigh4reachabletime : os->neigh4reachabletime;
173 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
174 s->neigh6reachabletime : os->neigh6reachabletime;
175 n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
176 s->dadtransmits : os->dadtransmits;
177 n->flags = s->flags | os->flags;
181 device_init_settings(struct device *dev, struct blob_attr **tb)
183 struct device_settings *s = &dev->settings;
184 struct blob_attr *cur;
185 struct ether_addr *ea;
186 bool disabled = false;
189 if ((cur = tb[DEV_ATTR_ENABLED]))
190 disabled = !blobmsg_get_bool(cur);
192 if ((cur = tb[DEV_ATTR_MTU])) {
193 s->mtu = blobmsg_get_u32(cur);
194 s->flags |= DEV_OPT_MTU;
197 if ((cur = tb[DEV_ATTR_MTU6])) {
198 s->mtu6 = blobmsg_get_u32(cur);
199 s->flags |= DEV_OPT_MTU6;
202 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
203 s->txqueuelen = blobmsg_get_u32(cur);
204 s->flags |= DEV_OPT_TXQUEUELEN;
207 if ((cur = tb[DEV_ATTR_MACADDR])) {
208 ea = ether_aton(blobmsg_data(cur));
210 memcpy(s->macaddr, ea, 6);
211 s->flags |= DEV_OPT_MACADDR;
215 if ((cur = tb[DEV_ATTR_IPV6])) {
216 s->ipv6 = blobmsg_get_bool(cur);
217 s->flags |= DEV_OPT_IPV6;
220 if ((cur = tb[DEV_ATTR_PROMISC])) {
221 s->promisc = blobmsg_get_bool(cur);
222 s->flags |= DEV_OPT_PROMISC;
225 if ((cur = tb[DEV_ATTR_RPFILTER])) {
226 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
227 s->flags |= DEV_OPT_RPFILTER;
229 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
232 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
233 s->acceptlocal = blobmsg_get_bool(cur);
234 s->flags |= DEV_OPT_ACCEPTLOCAL;
237 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
238 s->igmpversion = blobmsg_get_u32(cur);
239 if (s->igmpversion >= 1 && s->igmpversion <= 3)
240 s->flags |= DEV_OPT_IGMPVERSION;
242 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
245 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
246 s->mldversion = blobmsg_get_u32(cur);
247 if (s->mldversion >= 1 && s->mldversion <= 2)
248 s->flags |= DEV_OPT_MLDVERSION;
250 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
253 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
254 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
255 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
258 if ((cur = tb[DEV_ATTR_RPS])) {
259 s->rps = blobmsg_get_bool(cur);
260 s->flags |= DEV_OPT_RPS;
265 if ((cur = tb[DEV_ATTR_XPS])) {
266 s->xps = blobmsg_get_bool(cur);
267 s->flags |= DEV_OPT_XPS;
272 if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
273 s->dadtransmits = blobmsg_get_u32(cur);
274 s->flags |= DEV_OPT_DADTRANSMITS;
277 device_set_disabled(dev, disabled);
280 static void __init dev_init(void)
282 avl_init(&devices, avl_strcmp, true, NULL);
285 static int device_broadcast_cb(void *ctx, struct safe_list *list)
287 struct device_user *dep = container_of(list, struct device_user, list);
290 /* device might have been removed by an earlier callback */
299 void device_broadcast_event(struct device *dev, enum device_event ev)
303 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
304 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
307 int device_claim(struct device_user *dep)
309 struct device *dev = dep->dev;
316 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
317 if (++dev->active != 1)
320 device_broadcast_event(dev, DEV_EVENT_SETUP);
321 ret = dev->set_state(dev, true);
323 device_broadcast_event(dev, DEV_EVENT_UP);
325 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
327 dep->claimed = false;
333 void device_release(struct device_user *dep)
335 struct device *dev = dep->dev;
340 dep->claimed = false;
342 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
343 assert(dev->active >= 0);
348 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
350 dev->set_state(dev, false);
351 device_broadcast_event(dev, DEV_EVENT_DOWN);
354 int device_check_state(struct device *dev)
356 if (!dev->type->check_state)
357 return simple_device_type.check_state(dev);
359 return dev->type->check_state(dev);
362 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
368 strncpy(dev->ifname, name, IFNAMSIZ);
370 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
371 INIT_SAFE_LIST(&dev->users);
372 INIT_SAFE_LIST(&dev->aliases);
376 dev->set_state = set_device_state;
379 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
383 device_init_virtual(dev, type, ifname);
385 dev->avl.key = dev->ifname;
387 ret = avl_insert(&devices, &dev->avl);
391 system_if_clear_state(dev);
392 device_check_state(dev);
393 dev->settings.rps = default_ps;
394 dev->settings.xps = default_ps;
399 static struct device *
400 device_create_default(const char *name, bool external)
404 if (!external && system_if_force_external(name))
407 D(DEVICE, "Create simple device '%s'\n", name);
408 dev = calloc(1, sizeof(*dev));
409 dev->external = external;
410 dev->set_state = simple_device_set_state;
411 device_init(dev, &simple_device_type, name);
412 dev->default_config = true;
417 device_get(const char *name, int create)
421 if (strchr(name, '.'))
422 return get_vlan_device_chain(name, create);
425 return device_alias_get(name + 1);
427 dev = avl_find_element(&devices, name, dev, avl);
429 if (create > 1 && !dev->external) {
430 dev->external = true;
431 device_set_present(dev, true);
439 return device_create_default(name, create > 1);
443 device_delete(struct device *dev)
448 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
449 avl_delete(&devices, &dev->avl);
453 static int device_cleanup_cb(void *ctx, struct safe_list *list)
455 struct device_user *dep = container_of(list, struct device_user, list);
457 dep->cb(dep, DEV_EVENT_REMOVE);
463 void device_cleanup(struct device *dev)
465 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
466 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
467 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
471 static void __device_set_present(struct device *dev, bool state)
473 if (dev->present == state)
476 dev->present = state;
477 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
481 device_refresh_present(struct device *dev)
483 bool state = dev->sys_present;
485 if (dev->disabled || dev->deferred)
488 __device_set_present(dev, state);
491 void device_set_present(struct device *dev, bool state)
493 if (dev->sys_present == state)
496 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
497 dev->sys_present = state;
498 device_refresh_present(dev);
501 void device_set_link(struct device *dev, bool state)
503 if (dev->link_active == state)
506 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
508 dev->link_active = state;
509 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
512 void device_set_ifindex(struct device *dev, int ifindex)
514 if (dev->ifindex == ifindex)
517 dev->ifindex = ifindex;
518 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
521 static int device_refcount(struct device *dev)
523 struct list_head *list;
526 list_for_each(list, &dev->users.list)
529 list_for_each(list, &dev->aliases.list)
535 void device_add_user(struct device_user *dep, struct device *dev)
537 struct safe_list *head;
543 device_remove_user(dep);
551 head = &dev->aliases;
555 safe_list_add(&dep->list, head);
556 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
558 if (dep->cb && dev->present) {
559 dep->cb(dep, DEV_EVENT_ADD);
561 dep->cb(dep, DEV_EVENT_UP);
563 if (dev->link_active)
564 dep->cb(dep, DEV_EVENT_LINK_UP);
569 device_free(struct device *dev)
574 dev->type->free(dev);
579 __device_free_unused(struct device *dev)
581 if (!safe_list_empty(&dev->users) ||
582 !safe_list_empty(&dev->aliases) ||
583 dev->current_config || __devlock)
589 void device_remove_user(struct device_user *dep)
591 struct device *dev = dep->dev;
596 dep->hotplug = false;
600 safe_list_del(&dep->list);
602 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
603 __device_free_unused(dev);
607 device_free_unused(struct device *dev)
612 return __device_free_unused(dev);
614 avl_for_each_element_safe(&devices, dev, avl, tmp)
615 __device_free_unused(dev);
619 device_init_pending(void)
621 struct device *dev, *tmp;
623 avl_for_each_element_safe(&devices, dev, avl, tmp) {
624 if (!dev->config_pending)
627 dev->type->config_init(dev);
628 dev->config_pending = false;
632 static enum dev_change_type
633 device_set_config(struct device *dev, const struct device_type *type,
634 struct blob_attr *attr)
636 struct blob_attr *tb[__DEV_ATTR_MAX];
637 const struct uci_blob_param_list *cfg = type->config_params;
639 if (type != dev->type)
640 return DEV_CONFIG_RECREATE;
642 if (dev->type->reload)
643 return dev->type->reload(dev, attr);
645 if (uci_blob_check_equal(dev->config, attr, cfg))
646 return DEV_CONFIG_NO_CHANGE;
648 if (cfg == &device_attr_list) {
649 memset(tb, 0, sizeof(tb));
652 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
653 blob_data(attr), blob_len(attr));
655 device_init_settings(dev, tb);
656 return DEV_CONFIG_RESTART;
658 return DEV_CONFIG_RECREATE;
662 device_apply_config(struct device *dev, const struct device_type *type,
663 struct blob_attr *config)
665 enum dev_change_type change;
667 change = device_set_config(dev, type, config);
669 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
670 change = DEV_CONFIG_APPLIED;
674 case DEV_CONFIG_RESTART:
675 case DEV_CONFIG_APPLIED:
676 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
677 config = blob_memdup(config);
679 dev->config = config;
680 if (change == DEV_CONFIG_RESTART && dev->present) {
681 device_set_present(dev, false);
682 if (dev->active && !dev->external) {
683 dev->set_state(dev, false);
684 dev->set_state(dev, true);
686 device_set_present(dev, true);
689 case DEV_CONFIG_NO_CHANGE:
690 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
692 case DEV_CONFIG_RECREATE:
700 device_replace(struct device *dev, struct device *odev)
702 struct device_user *dep, *tmp;
703 bool present = odev->present;
706 device_set_present(odev, false);
708 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
710 safe_list_del(&dep->list);
711 safe_list_add(&dep->list, &dev->users);
717 device_set_present(dev, true);
721 device_reset_config(void)
725 avl_for_each_element(&devices, dev, avl)
726 dev->current_config = false;
730 device_reset_old(void)
732 struct device *dev, *tmp, *ndev;
734 avl_for_each_element_safe(&devices, dev, avl, tmp) {
735 if (dev->current_config || dev->default_config)
738 if (dev->type != &simple_device_type)
741 ndev = device_create_default(dev->ifname, dev->external);
742 device_replace(ndev, dev);
747 device_set_default_ps(bool state)
751 if (state == default_ps)
756 avl_for_each_element(&devices, dev, avl) {
757 struct device_settings *s = &dev->settings;
758 unsigned int apply_mask = 0;
760 if (!(s->flags & DEV_OPT_RPS)) {
762 apply_mask |= DEV_OPT_RPS;
765 if (!(s->flags & DEV_OPT_XPS)) {
767 apply_mask |= DEV_OPT_XPS;
773 if (!(dev->external || (dev->present && dev->active)) ||
777 system_if_apply_settings(dev, s, apply_mask);
782 device_create(const char *name, const struct device_type *type,
783 struct blob_attr *config)
785 struct device *odev = NULL, *dev;
786 enum dev_change_type change;
788 odev = device_get(name, false);
790 odev->current_config = true;
791 change = device_apply_config(odev, type, config);
793 case DEV_CONFIG_RECREATE:
794 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
801 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
803 config = blob_memdup(config);
807 dev = type->create(name, config);
811 dev->current_config = true;
812 dev->config = config;
814 device_replace(dev, odev);
816 if (!config_init && dev->config_pending) {
817 type->config_init(dev);
818 dev->config_pending = false;
825 device_dump_status(struct blob_buf *b, struct device *dev)
827 struct device_settings st;
831 avl_for_each_element(&devices, dev, avl) {
834 c = blobmsg_open_table(b, dev->ifname);
835 device_dump_status(b, dev);
836 blobmsg_close_table(b, c);
842 blobmsg_add_u8(b, "external", dev->external);
843 blobmsg_add_u8(b, "present", dev->present);
844 blobmsg_add_string(b, "type", dev->type->name);
849 blobmsg_add_u8(b, "up", !!dev->active);
850 blobmsg_add_u8(b, "carrier", !!dev->link_active);
852 if (dev->type->dump_info)
853 dev->type->dump_info(dev, b);
855 system_if_dump_info(dev, b);
858 device_merge_settings(dev, &st);
859 if (st.flags & DEV_OPT_MTU)
860 blobmsg_add_u32(b, "mtu", st.mtu);
861 if (st.flags & DEV_OPT_MTU6)
862 blobmsg_add_u32(b, "mtu6", st.mtu6);
863 if (st.flags & DEV_OPT_MACADDR)
864 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
865 if (st.flags & DEV_OPT_TXQUEUELEN)
866 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
867 if (st.flags & DEV_OPT_IPV6)
868 blobmsg_add_u8(b, "ipv6", st.ipv6);
869 if (st.flags & DEV_OPT_PROMISC)
870 blobmsg_add_u8(b, "promisc", st.promisc);
871 if (st.flags & DEV_OPT_RPFILTER)
872 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
873 if (st.flags & DEV_OPT_ACCEPTLOCAL)
874 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
875 if (st.flags & DEV_OPT_IGMPVERSION)
876 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
877 if (st.flags & DEV_OPT_MLDVERSION)
878 blobmsg_add_u32(b, "mldversion", st.mldversion);
879 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
880 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
881 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
883 if (st.flags & DEV_OPT_DADTRANSMITS)
884 blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
887 s = blobmsg_open_table(b, "statistics");
888 if (dev->type->dump_stats)
889 dev->type->dump_stats(dev, b);
891 system_if_dump_stats(dev, b);
892 blobmsg_close_table(b, s);