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 },
52 const struct uci_blob_param_list device_attr_list = {
53 .n_params = __DEV_ATTR_MAX,
57 static int __devlock = 0;
59 void device_lock(void)
64 void device_unlock(void)
68 device_free_unused(NULL);
71 static int set_device_state(struct device *dev, bool state)
74 /* Set ifindex for all devices being enabled so a valid */
75 /* ifindex is in place avoiding possible race conditions */
76 device_set_ifindex(dev, system_if_resolve(dev));
93 simple_device_set_state(struct device *dev, bool state)
98 pdev = dev->parent.dev;
100 pdev = system_if_get_parent(dev);
102 device_add_user(&dev->parent, pdev);
107 ret = device_claim(&dev->parent);
109 device_release(&dev->parent);
114 return set_device_state(dev, state);
117 static struct device *
118 simple_device_create(const char *name, struct blob_attr *attr)
120 struct blob_attr *tb[__DEV_ATTR_MAX];
121 struct device *dev = NULL;
123 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
124 dev = device_get(name, true);
128 dev->set_state = simple_device_set_state;
129 device_init_settings(dev, tb);
134 static void simple_device_free(struct device *dev)
137 device_remove_user(&dev->parent);
141 const struct device_type simple_device_type = {
142 .name = "Network device",
143 .config_params = &device_attr_list,
145 .create = simple_device_create,
146 .check_state = system_if_check,
147 .free = simple_device_free,
151 device_merge_settings(struct device *dev, struct device_settings *n)
153 struct device_settings *os = &dev->orig_settings;
154 struct device_settings *s = &dev->settings;
156 memset(n, 0, sizeof(*n));
157 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
158 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
159 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
160 s->txqueuelen : os->txqueuelen;
162 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
164 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
165 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
166 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
167 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
168 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
169 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
170 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
171 s->neigh4reachabletime : os->neigh4reachabletime;
172 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
173 s->neigh6reachabletime : os->neigh6reachabletime;
174 n->flags = s->flags | os->flags;
178 device_init_settings(struct device *dev, struct blob_attr **tb)
180 struct device_settings *s = &dev->settings;
181 struct blob_attr *cur;
182 struct ether_addr *ea;
183 bool disabled = false;
186 if ((cur = tb[DEV_ATTR_ENABLED]))
187 disabled = !blobmsg_get_bool(cur);
189 if ((cur = tb[DEV_ATTR_MTU])) {
190 s->mtu = blobmsg_get_u32(cur);
191 s->flags |= DEV_OPT_MTU;
194 if ((cur = tb[DEV_ATTR_MTU6])) {
195 s->mtu6 = blobmsg_get_u32(cur);
196 s->flags |= DEV_OPT_MTU6;
199 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
200 s->txqueuelen = blobmsg_get_u32(cur);
201 s->flags |= DEV_OPT_TXQUEUELEN;
204 if ((cur = tb[DEV_ATTR_MACADDR])) {
205 ea = ether_aton(blobmsg_data(cur));
207 memcpy(s->macaddr, ea, 6);
208 s->flags |= DEV_OPT_MACADDR;
212 if ((cur = tb[DEV_ATTR_IPV6])) {
213 s->ipv6 = blobmsg_get_bool(cur);
214 s->flags |= DEV_OPT_IPV6;
217 if ((cur = tb[DEV_ATTR_PROMISC])) {
218 s->promisc = blobmsg_get_bool(cur);
219 s->flags |= DEV_OPT_PROMISC;
222 if ((cur = tb[DEV_ATTR_RPFILTER])) {
223 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
224 s->flags |= DEV_OPT_RPFILTER;
226 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
229 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
230 s->acceptlocal = blobmsg_get_bool(cur);
231 s->flags |= DEV_OPT_ACCEPTLOCAL;
234 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
235 s->igmpversion = blobmsg_get_u32(cur);
236 if (s->igmpversion >= 1 && s->igmpversion <= 3)
237 s->flags |= DEV_OPT_IGMPVERSION;
239 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
242 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
243 s->mldversion = blobmsg_get_u32(cur);
244 if (s->mldversion >= 1 && s->mldversion <= 2)
245 s->flags |= DEV_OPT_MLDVERSION;
247 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
250 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
251 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
252 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
255 if ((cur = tb[DEV_ATTR_RPS])) {
256 s->rps = blobmsg_get_bool(cur);
257 s->flags |= DEV_OPT_RPS;
262 if ((cur = tb[DEV_ATTR_XPS])) {
263 s->xps = blobmsg_get_bool(cur);
264 s->flags |= DEV_OPT_XPS;
269 device_set_disabled(dev, disabled);
272 static void __init dev_init(void)
274 avl_init(&devices, avl_strcmp, true, NULL);
277 static int device_broadcast_cb(void *ctx, struct safe_list *list)
279 struct device_user *dep = container_of(list, struct device_user, list);
282 /* device might have been removed by an earlier callback */
291 void device_broadcast_event(struct device *dev, enum device_event ev)
295 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
296 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
299 int device_claim(struct device_user *dep)
301 struct device *dev = dep->dev;
308 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
309 if (++dev->active != 1)
312 device_broadcast_event(dev, DEV_EVENT_SETUP);
313 ret = dev->set_state(dev, true);
315 device_broadcast_event(dev, DEV_EVENT_UP);
317 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
319 dep->claimed = false;
325 void device_release(struct device_user *dep)
327 struct device *dev = dep->dev;
332 dep->claimed = false;
334 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
335 assert(dev->active >= 0);
340 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
342 dev->set_state(dev, false);
343 device_broadcast_event(dev, DEV_EVENT_DOWN);
346 int device_check_state(struct device *dev)
348 if (!dev->type->check_state)
349 return simple_device_type.check_state(dev);
351 return dev->type->check_state(dev);
354 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
360 strncpy(dev->ifname, name, IFNAMSIZ);
362 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
363 INIT_SAFE_LIST(&dev->users);
364 INIT_SAFE_LIST(&dev->aliases);
368 dev->set_state = set_device_state;
371 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
375 device_init_virtual(dev, type, ifname);
377 dev->avl.key = dev->ifname;
379 ret = avl_insert(&devices, &dev->avl);
383 system_if_clear_state(dev);
384 device_check_state(dev);
385 dev->settings.rps = default_ps;
386 dev->settings.xps = default_ps;
391 static struct device *
392 device_create_default(const char *name, bool external)
396 if (!external && system_if_force_external(name))
399 D(DEVICE, "Create simple device '%s'\n", name);
400 dev = calloc(1, sizeof(*dev));
401 dev->external = external;
402 dev->set_state = simple_device_set_state;
403 device_init(dev, &simple_device_type, name);
404 dev->default_config = true;
409 device_get(const char *name, int create)
413 if (strchr(name, '.'))
414 return get_vlan_device_chain(name, create);
417 return device_alias_get(name + 1);
419 dev = avl_find_element(&devices, name, dev, avl);
421 if (create > 1 && !dev->external) {
422 dev->external = true;
423 device_set_present(dev, true);
431 return device_create_default(name, create > 1);
435 device_delete(struct device *dev)
440 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
441 avl_delete(&devices, &dev->avl);
445 static int device_cleanup_cb(void *ctx, struct safe_list *list)
447 struct device_user *dep = container_of(list, struct device_user, list);
449 dep->cb(dep, DEV_EVENT_REMOVE);
455 void device_cleanup(struct device *dev)
457 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
458 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
459 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
463 static void __device_set_present(struct device *dev, bool state)
465 if (dev->present == state)
468 dev->present = state;
469 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
473 device_refresh_present(struct device *dev)
475 bool state = dev->sys_present;
477 if (dev->disabled || dev->deferred)
480 __device_set_present(dev, state);
483 void device_set_present(struct device *dev, bool state)
485 if (dev->sys_present == state)
488 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
489 dev->sys_present = state;
490 device_refresh_present(dev);
493 void device_set_link(struct device *dev, bool state)
495 if (dev->link_active == state)
498 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
500 dev->link_active = state;
501 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
504 void device_set_ifindex(struct device *dev, int ifindex)
506 if (dev->ifindex == ifindex)
509 dev->ifindex = ifindex;
510 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
513 static int device_refcount(struct device *dev)
515 struct list_head *list;
518 list_for_each(list, &dev->users.list)
521 list_for_each(list, &dev->aliases.list)
527 void device_add_user(struct device_user *dep, struct device *dev)
529 struct safe_list *head;
535 device_remove_user(dep);
543 head = &dev->aliases;
547 safe_list_add(&dep->list, head);
548 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
550 if (dep->cb && dev->present) {
551 dep->cb(dep, DEV_EVENT_ADD);
553 dep->cb(dep, DEV_EVENT_UP);
555 if (dev->link_active)
556 dep->cb(dep, DEV_EVENT_LINK_UP);
561 device_free(struct device *dev)
566 dev->type->free(dev);
571 __device_free_unused(struct device *dev)
573 if (!safe_list_empty(&dev->users) ||
574 !safe_list_empty(&dev->aliases) ||
575 dev->current_config || __devlock)
581 void device_remove_user(struct device_user *dep)
583 struct device *dev = dep->dev;
588 dep->hotplug = false;
592 safe_list_del(&dep->list);
594 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
595 __device_free_unused(dev);
599 device_free_unused(struct device *dev)
604 return __device_free_unused(dev);
606 avl_for_each_element_safe(&devices, dev, avl, tmp)
607 __device_free_unused(dev);
611 device_init_pending(void)
613 struct device *dev, *tmp;
615 avl_for_each_element_safe(&devices, dev, avl, tmp) {
616 if (!dev->config_pending)
619 dev->type->config_init(dev);
620 dev->config_pending = false;
624 static enum dev_change_type
625 device_set_config(struct device *dev, const struct device_type *type,
626 struct blob_attr *attr)
628 struct blob_attr *tb[__DEV_ATTR_MAX];
629 const struct uci_blob_param_list *cfg = type->config_params;
631 if (type != dev->type)
632 return DEV_CONFIG_RECREATE;
634 if (dev->type->reload)
635 return dev->type->reload(dev, attr);
637 if (uci_blob_check_equal(dev->config, attr, cfg))
638 return DEV_CONFIG_NO_CHANGE;
640 if (cfg == &device_attr_list) {
641 memset(tb, 0, sizeof(tb));
644 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
645 blob_data(attr), blob_len(attr));
647 device_init_settings(dev, tb);
648 return DEV_CONFIG_RESTART;
650 return DEV_CONFIG_RECREATE;
654 device_apply_config(struct device *dev, const struct device_type *type,
655 struct blob_attr *config)
657 enum dev_change_type change;
659 change = device_set_config(dev, type, config);
661 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
662 change = DEV_CONFIG_APPLIED;
666 case DEV_CONFIG_RESTART:
667 case DEV_CONFIG_APPLIED:
668 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
669 config = blob_memdup(config);
671 dev->config = config;
672 if (change == DEV_CONFIG_RESTART && dev->present) {
673 device_set_present(dev, false);
674 if (dev->active && !dev->external) {
675 dev->set_state(dev, false);
676 dev->set_state(dev, true);
678 device_set_present(dev, true);
681 case DEV_CONFIG_NO_CHANGE:
682 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
684 case DEV_CONFIG_RECREATE:
692 device_replace(struct device *dev, struct device *odev)
694 struct device_user *dep, *tmp;
695 bool present = odev->present;
698 device_set_present(odev, false);
700 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
702 safe_list_del(&dep->list);
703 safe_list_add(&dep->list, &dev->users);
709 device_set_present(dev, true);
713 device_reset_config(void)
717 avl_for_each_element(&devices, dev, avl)
718 dev->current_config = false;
722 device_reset_old(void)
724 struct device *dev, *tmp, *ndev;
726 avl_for_each_element_safe(&devices, dev, avl, tmp) {
727 if (dev->current_config || dev->default_config)
730 if (dev->type != &simple_device_type)
733 ndev = device_create_default(dev->ifname, dev->external);
734 device_replace(ndev, dev);
739 device_set_default_ps(bool state)
743 if (state == default_ps)
748 avl_for_each_element(&devices, dev, avl) {
749 struct device_settings *s = &dev->settings;
750 unsigned int apply_mask = 0;
752 if (!(s->flags & DEV_OPT_RPS)) {
754 apply_mask |= DEV_OPT_RPS;
757 if (!(s->flags & DEV_OPT_XPS)) {
759 apply_mask |= DEV_OPT_XPS;
765 if (!(dev->external || (dev->present && dev->active)) ||
769 system_if_apply_settings(dev, s, apply_mask);
774 device_create(const char *name, const struct device_type *type,
775 struct blob_attr *config)
777 struct device *odev = NULL, *dev;
778 enum dev_change_type change;
780 odev = device_get(name, false);
782 odev->current_config = true;
783 change = device_apply_config(odev, type, config);
785 case DEV_CONFIG_RECREATE:
786 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
793 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
795 config = blob_memdup(config);
799 dev = type->create(name, config);
803 dev->current_config = true;
804 dev->config = config;
806 device_replace(dev, odev);
808 if (!config_init && dev->config_pending) {
809 type->config_init(dev);
810 dev->config_pending = false;
817 device_dump_status(struct blob_buf *b, struct device *dev)
819 struct device_settings st;
823 avl_for_each_element(&devices, dev, avl) {
826 c = blobmsg_open_table(b, dev->ifname);
827 device_dump_status(b, dev);
828 blobmsg_close_table(b, c);
834 blobmsg_add_u8(b, "external", dev->external);
835 blobmsg_add_u8(b, "present", dev->present);
836 blobmsg_add_string(b, "type", dev->type->name);
841 blobmsg_add_u8(b, "up", !!dev->active);
842 blobmsg_add_u8(b, "carrier", !!dev->link_active);
844 if (dev->type->dump_info)
845 dev->type->dump_info(dev, b);
847 system_if_dump_info(dev, b);
850 device_merge_settings(dev, &st);
851 if (st.flags & DEV_OPT_MTU)
852 blobmsg_add_u32(b, "mtu", st.mtu);
853 if (st.flags & DEV_OPT_MTU6)
854 blobmsg_add_u32(b, "mtu6", st.mtu6);
855 if (st.flags & DEV_OPT_MACADDR)
856 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
857 if (st.flags & DEV_OPT_TXQUEUELEN)
858 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
859 if (st.flags & DEV_OPT_IPV6)
860 blobmsg_add_u8(b, "ipv6", st.ipv6);
861 if (st.flags & DEV_OPT_PROMISC)
862 blobmsg_add_u8(b, "promisc", st.promisc);
863 if (st.flags & DEV_OPT_RPFILTER)
864 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
865 if (st.flags & DEV_OPT_ACCEPTLOCAL)
866 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
867 if (st.flags & DEV_OPT_IGMPVERSION)
868 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
869 if (st.flags & DEV_OPT_MLDVERSION)
870 blobmsg_add_u32(b, "mldversion", st.mldversion);
871 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
872 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
873 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
877 s = blobmsg_open_table(b, "statistics");
878 if (dev->type->dump_stats)
879 dev->type->dump_stats(dev, b);
881 system_if_dump_stats(dev, b);
882 blobmsg_close_table(b, s);