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 },
48 const struct uci_blob_param_list device_attr_list = {
49 .n_params = __DEV_ATTR_MAX,
53 static int __devlock = 0;
55 void device_lock(void)
60 void device_unlock(void)
64 device_free_unused(NULL);
67 static int set_device_state(struct device *dev, bool state)
70 /* Set ifindex for all devices being enabled so a valid */
71 /* ifindex is in place avoiding possible race conditions */
72 device_set_ifindex(dev, system_if_resolve(dev));
89 simple_device_set_state(struct device *dev, bool state)
94 pdev = dev->parent.dev;
96 pdev = system_if_get_parent(dev);
98 device_add_user(&dev->parent, pdev);
103 ret = device_claim(&dev->parent);
105 device_release(&dev->parent);
110 return set_device_state(dev, state);
113 static struct device *
114 simple_device_create(const char *name, struct blob_attr *attr)
116 struct blob_attr *tb[__DEV_ATTR_MAX];
117 struct device *dev = NULL;
119 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
120 dev = device_get(name, true);
124 dev->set_state = simple_device_set_state;
125 device_init_settings(dev, tb);
130 static void simple_device_free(struct device *dev)
133 device_remove_user(&dev->parent);
137 const struct device_type simple_device_type = {
138 .name = "Network device",
139 .config_params = &device_attr_list,
141 .create = simple_device_create,
142 .check_state = system_if_check,
143 .free = simple_device_free,
147 device_merge_settings(struct device *dev, struct device_settings *n)
149 struct device_settings *os = &dev->orig_settings;
150 struct device_settings *s = &dev->settings;
152 memset(n, 0, sizeof(*n));
153 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
154 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
155 s->txqueuelen : os->txqueuelen;
157 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
159 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
160 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
161 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
162 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
163 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
164 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
165 n->flags = s->flags | os->flags;
169 device_init_settings(struct device *dev, struct blob_attr **tb)
171 struct device_settings *s = &dev->settings;
172 struct blob_attr *cur;
173 struct ether_addr *ea;
174 bool disabled = false;
177 if ((cur = tb[DEV_ATTR_ENABLED]))
178 disabled = !blobmsg_get_bool(cur);
180 if ((cur = tb[DEV_ATTR_MTU])) {
181 s->mtu = blobmsg_get_u32(cur);
182 s->flags |= DEV_OPT_MTU;
185 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
186 s->txqueuelen = blobmsg_get_u32(cur);
187 s->flags |= DEV_OPT_TXQUEUELEN;
190 if ((cur = tb[DEV_ATTR_MACADDR])) {
191 ea = ether_aton(blobmsg_data(cur));
193 memcpy(s->macaddr, ea, 6);
194 s->flags |= DEV_OPT_MACADDR;
198 if ((cur = tb[DEV_ATTR_IPV6])) {
199 s->ipv6 = blobmsg_get_bool(cur);
200 s->flags |= DEV_OPT_IPV6;
203 if ((cur = tb[DEV_ATTR_PROMISC])) {
204 s->promisc = blobmsg_get_bool(cur);
205 s->flags |= DEV_OPT_PROMISC;
208 if ((cur = tb[DEV_ATTR_RPFILTER])) {
209 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
210 s->flags |= DEV_OPT_RPFILTER;
212 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
215 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
216 s->acceptlocal = blobmsg_get_bool(cur);
217 s->flags |= DEV_OPT_ACCEPTLOCAL;
220 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
221 s->igmpversion = blobmsg_get_u32(cur);
222 if (s->igmpversion >= 1 && s->igmpversion <= 3)
223 s->flags |= DEV_OPT_IGMPVERSION;
225 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
228 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
229 s->mldversion = blobmsg_get_u32(cur);
230 if (s->mldversion >= 1 && s->mldversion <= 2)
231 s->flags |= DEV_OPT_MLDVERSION;
233 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
236 device_set_disabled(dev, disabled);
239 static void __init dev_init(void)
241 avl_init(&devices, avl_strcmp, true, NULL);
244 static int device_broadcast_cb(void *ctx, struct safe_list *list)
246 struct device_user *dep = container_of(list, struct device_user, list);
249 /* device might have been removed by an earlier callback */
258 void device_broadcast_event(struct device *dev, enum device_event ev)
262 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
263 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
266 int device_claim(struct device_user *dep)
268 struct device *dev = dep->dev;
275 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
276 if (++dev->active != 1)
279 device_broadcast_event(dev, DEV_EVENT_SETUP);
280 ret = dev->set_state(dev, true);
282 device_broadcast_event(dev, DEV_EVENT_UP);
284 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
286 dep->claimed = false;
292 void device_release(struct device_user *dep)
294 struct device *dev = dep->dev;
299 dep->claimed = false;
301 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
302 assert(dev->active >= 0);
307 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
309 dev->set_state(dev, false);
310 device_broadcast_event(dev, DEV_EVENT_DOWN);
313 int device_check_state(struct device *dev)
315 if (!dev->type->check_state)
316 return simple_device_type.check_state(dev);
318 return dev->type->check_state(dev);
321 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
327 strncpy(dev->ifname, name, IFNAMSIZ);
329 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
330 INIT_SAFE_LIST(&dev->users);
331 INIT_SAFE_LIST(&dev->aliases);
335 dev->set_state = set_device_state;
338 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
342 device_init_virtual(dev, type, ifname);
344 dev->avl.key = dev->ifname;
346 ret = avl_insert(&devices, &dev->avl);
350 system_if_clear_state(dev);
351 device_check_state(dev);
356 static struct device *
357 device_create_default(const char *name, bool external)
361 if (!external && system_if_force_external(name))
364 D(DEVICE, "Create simple device '%s'\n", name);
365 dev = calloc(1, sizeof(*dev));
366 dev->external = external;
367 dev->set_state = simple_device_set_state;
368 device_init(dev, &simple_device_type, name);
369 dev->default_config = true;
374 device_get(const char *name, int create)
378 if (strchr(name, '.'))
379 return get_vlan_device_chain(name, create);
382 return device_alias_get(name + 1);
384 dev = avl_find_element(&devices, name, dev, avl);
386 if (create > 1 && !dev->external) {
387 dev->external = true;
388 device_set_present(dev, true);
396 return device_create_default(name, create > 1);
400 device_delete(struct device *dev)
405 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
406 avl_delete(&devices, &dev->avl);
410 static int device_cleanup_cb(void *ctx, struct safe_list *list)
412 struct device_user *dep = container_of(list, struct device_user, list);
414 dep->cb(dep, DEV_EVENT_REMOVE);
420 void device_cleanup(struct device *dev)
422 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
423 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
424 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
428 static void __device_set_present(struct device *dev, bool state)
430 if (dev->present == state)
433 dev->present = state;
434 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
438 device_refresh_present(struct device *dev)
440 bool state = dev->sys_present;
442 if (dev->disabled || dev->deferred)
445 __device_set_present(dev, state);
448 void device_set_present(struct device *dev, bool state)
450 if (dev->sys_present == state)
453 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
454 dev->sys_present = state;
455 device_refresh_present(dev);
458 void device_set_link(struct device *dev, bool state)
460 if (dev->link_active == state)
463 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
465 dev->link_active = state;
466 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
469 void device_set_ifindex(struct device *dev, int ifindex)
471 if (dev->ifindex == ifindex)
474 dev->ifindex = ifindex;
475 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
478 static int device_refcount(struct device *dev)
480 struct list_head *list;
483 list_for_each(list, &dev->users.list)
486 list_for_each(list, &dev->aliases.list)
492 void device_add_user(struct device_user *dep, struct device *dev)
494 struct safe_list *head;
500 device_remove_user(dep);
508 head = &dev->aliases;
512 safe_list_add(&dep->list, head);
513 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
515 if (dep->cb && dev->present) {
516 dep->cb(dep, DEV_EVENT_ADD);
518 dep->cb(dep, DEV_EVENT_UP);
520 if (dev->link_active)
521 dep->cb(dep, DEV_EVENT_LINK_UP);
526 device_free(struct device *dev)
531 dev->type->free(dev);
536 __device_free_unused(struct device *dev)
538 if (!safe_list_empty(&dev->users) ||
539 !safe_list_empty(&dev->aliases) ||
540 dev->current_config || __devlock)
546 void device_remove_user(struct device_user *dep)
548 struct device *dev = dep->dev;
553 dep->hotplug = false;
557 safe_list_del(&dep->list);
559 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
560 __device_free_unused(dev);
564 device_free_unused(struct device *dev)
569 return __device_free_unused(dev);
571 avl_for_each_element_safe(&devices, dev, avl, tmp)
572 __device_free_unused(dev);
576 device_init_pending(void)
578 struct device *dev, *tmp;
580 avl_for_each_element_safe(&devices, dev, avl, tmp) {
581 if (!dev->config_pending)
584 dev->type->config_init(dev);
585 dev->config_pending = false;
590 device_set_config(struct device *dev, const struct device_type *type,
591 struct blob_attr *attr)
593 struct blob_attr *tb[__DEV_ATTR_MAX];
594 const struct uci_blob_param_list *cfg = type->config_params;
596 if (type != dev->type)
597 return DEV_CONFIG_RECREATE;
599 if (dev->type->reload)
600 return dev->type->reload(dev, attr);
602 if (uci_blob_check_equal(dev->config, attr, cfg))
603 return DEV_CONFIG_NO_CHANGE;
605 if (cfg == &device_attr_list) {
606 memset(tb, 0, sizeof(tb));
609 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
610 blob_data(attr), blob_len(attr));
612 device_init_settings(dev, tb);
613 return DEV_CONFIG_RESTART;
615 return DEV_CONFIG_RECREATE;
619 device_apply_config(struct device *dev, const struct device_type *type,
620 struct blob_attr *config)
622 enum dev_change_type change;
624 change = device_set_config(dev, type, config);
626 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
627 change = DEV_CONFIG_APPLIED;
631 case DEV_CONFIG_RESTART:
632 case DEV_CONFIG_APPLIED:
633 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
634 config = blob_memdup(config);
636 dev->config = config;
637 if (change == DEV_CONFIG_RESTART && dev->present) {
638 device_set_present(dev, false);
639 device_set_present(dev, true);
642 case DEV_CONFIG_NO_CHANGE:
643 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
645 case DEV_CONFIG_RECREATE:
653 device_replace(struct device *dev, struct device *odev)
655 struct device_user *dep, *tmp;
656 bool present = odev->present;
659 device_set_present(odev, false);
661 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
663 safe_list_del(&dep->list);
664 safe_list_add(&dep->list, &dev->users);
670 device_set_present(dev, true);
674 device_reset_config(void)
678 avl_for_each_element(&devices, dev, avl)
679 dev->current_config = false;
683 device_reset_old(void)
685 struct device *dev, *tmp, *ndev;
687 avl_for_each_element_safe(&devices, dev, avl, tmp) {
688 if (dev->current_config || dev->default_config)
691 if (dev->type != &simple_device_type)
694 ndev = device_create_default(dev->ifname, dev->external);
695 device_replace(ndev, dev);
700 device_create(const char *name, const struct device_type *type,
701 struct blob_attr *config)
703 struct device *odev = NULL, *dev;
704 enum dev_change_type change;
706 odev = device_get(name, false);
708 odev->current_config = true;
709 change = device_apply_config(odev, type, config);
711 case DEV_CONFIG_RECREATE:
712 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
719 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
721 config = blob_memdup(config);
725 dev = type->create(name, config);
729 dev->current_config = true;
730 dev->config = config;
732 device_replace(dev, odev);
734 if (!config_init && dev->config_pending)
735 type->config_init(dev);
741 device_dump_status(struct blob_buf *b, struct device *dev)
743 struct device_settings st;
747 avl_for_each_element(&devices, dev, avl) {
750 c = blobmsg_open_table(b, dev->ifname);
751 device_dump_status(b, dev);
752 blobmsg_close_table(b, c);
758 blobmsg_add_u8(b, "external", dev->external);
759 blobmsg_add_u8(b, "present", dev->present);
760 blobmsg_add_string(b, "type", dev->type->name);
765 blobmsg_add_u8(b, "up", !!dev->active);
766 blobmsg_add_u8(b, "carrier", !!dev->link_active);
768 if (dev->type->dump_info)
769 dev->type->dump_info(dev, b);
771 system_if_dump_info(dev, b);
774 device_merge_settings(dev, &st);
775 if (st.flags & DEV_OPT_MTU)
776 blobmsg_add_u32(b, "mtu", st.mtu);
777 if (st.flags & DEV_OPT_MACADDR)
778 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
779 if (st.flags & DEV_OPT_TXQUEUELEN)
780 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
781 if (st.flags & DEV_OPT_IPV6)
782 blobmsg_add_u8(b, "ipv6", st.ipv6);
783 if (st.flags & DEV_OPT_PROMISC)
784 blobmsg_add_u8(b, "promisc", st.promisc);
785 if (st.flags & DEV_OPT_RPFILTER)
786 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
787 if (st.flags & DEV_OPT_ACCEPTLOCAL)
788 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
789 if (st.flags & DEV_OPT_IGMPVERSION)
790 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
791 if (st.flags & DEV_OPT_MLDVERSION)
792 blobmsg_add_u32(b, "mldversion", st.mldversion);
795 s = blobmsg_open_table(b, "statistics");
796 if (dev->type->dump_stats)
797 dev->type->dump_stats(dev, b);
799 system_if_dump_stats(dev, b);
800 blobmsg_close_table(b, s);