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 },
44 const struct uci_blob_param_list device_attr_list = {
45 .n_params = __DEV_ATTR_MAX,
49 static int __devlock = 0;
51 void device_lock(void)
56 void device_unlock(void)
60 device_free_unused(NULL);
63 static int set_device_state(struct device *dev, bool state)
66 /* Set ifindex for all devices being enabled so a valid */
67 /* ifindex is in place avoiding possible race conditions */
68 device_set_ifindex(dev, system_if_resolve(dev));
85 simple_device_set_state(struct device *dev, bool state)
90 pdev = dev->parent.dev;
92 pdev = system_if_get_parent(dev);
94 device_add_user(&dev->parent, pdev);
99 ret = device_claim(&dev->parent);
101 device_release(&dev->parent);
106 return set_device_state(dev, state);
109 static struct device *
110 simple_device_create(const char *name, struct blob_attr *attr)
112 struct blob_attr *tb[__DEV_ATTR_MAX];
113 struct device *dev = NULL;
115 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
116 dev = device_get(name, true);
120 dev->set_state = simple_device_set_state;
121 device_init_settings(dev, tb);
126 static void simple_device_free(struct device *dev)
129 device_remove_user(&dev->parent);
133 const struct device_type simple_device_type = {
134 .name = "Network device",
135 .config_params = &device_attr_list,
137 .create = simple_device_create,
138 .check_state = system_if_check,
139 .free = simple_device_free,
143 device_merge_settings(struct device *dev, struct device_settings *n)
145 struct device_settings *os = &dev->orig_settings;
146 struct device_settings *s = &dev->settings;
148 memset(n, 0, sizeof(*n));
149 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
150 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
151 s->txqueuelen : os->txqueuelen;
153 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
155 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
156 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
157 n->flags = s->flags | os->flags;
161 device_init_settings(struct device *dev, struct blob_attr **tb)
163 struct device_settings *s = &dev->settings;
164 struct blob_attr *cur;
165 struct ether_addr *ea;
166 bool disabled = false;
169 if ((cur = tb[DEV_ATTR_ENABLED]))
170 disabled = !blobmsg_get_bool(cur);
172 if ((cur = tb[DEV_ATTR_MTU])) {
173 s->mtu = blobmsg_get_u32(cur);
174 s->flags |= DEV_OPT_MTU;
177 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
178 s->txqueuelen = blobmsg_get_u32(cur);
179 s->flags |= DEV_OPT_TXQUEUELEN;
182 if ((cur = tb[DEV_ATTR_MACADDR])) {
183 ea = ether_aton(blobmsg_data(cur));
185 memcpy(s->macaddr, ea, 6);
186 s->flags |= DEV_OPT_MACADDR;
190 if ((cur = tb[DEV_ATTR_IPV6])) {
191 s->ipv6 = blobmsg_get_bool(cur);
192 s->flags |= DEV_OPT_IPV6;
195 if ((cur = tb[DEV_ATTR_PROMISC])) {
196 s->promisc = blobmsg_get_bool(cur);
197 s->flags |= DEV_OPT_PROMISC;
200 device_set_disabled(dev, disabled);
203 static void __init dev_init(void)
205 avl_init(&devices, avl_strcmp, true, NULL);
208 static int device_broadcast_cb(void *ctx, struct safe_list *list)
210 struct device_user *dep = container_of(list, struct device_user, list);
213 /* device might have been removed by an earlier callback */
222 void device_broadcast_event(struct device *dev, enum device_event ev)
226 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
227 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
230 int device_claim(struct device_user *dep)
232 struct device *dev = dep->dev;
239 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
240 if (++dev->active != 1)
243 device_broadcast_event(dev, DEV_EVENT_SETUP);
244 ret = dev->set_state(dev, true);
246 device_broadcast_event(dev, DEV_EVENT_UP);
248 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
250 dep->claimed = false;
256 void device_release(struct device_user *dep)
258 struct device *dev = dep->dev;
263 dep->claimed = false;
265 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
266 assert(dev->active >= 0);
271 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
273 dev->set_state(dev, false);
274 device_broadcast_event(dev, DEV_EVENT_DOWN);
277 int device_check_state(struct device *dev)
279 if (!dev->type->check_state)
280 return simple_device_type.check_state(dev);
282 return dev->type->check_state(dev);
285 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
291 strncpy(dev->ifname, name, IFNAMSIZ);
293 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
294 INIT_SAFE_LIST(&dev->users);
295 INIT_SAFE_LIST(&dev->aliases);
299 dev->set_state = set_device_state;
302 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
306 device_init_virtual(dev, type, ifname);
308 dev->avl.key = dev->ifname;
310 ret = avl_insert(&devices, &dev->avl);
314 system_if_clear_state(dev);
315 device_check_state(dev);
320 static struct device *
321 device_create_default(const char *name, bool external)
325 if (!external && system_if_force_external(name))
328 D(DEVICE, "Create simple device '%s'\n", name);
329 dev = calloc(1, sizeof(*dev));
330 dev->external = external;
331 dev->set_state = simple_device_set_state;
332 device_init(dev, &simple_device_type, name);
333 dev->default_config = true;
338 device_get(const char *name, int create)
342 if (strchr(name, '.'))
343 return get_vlan_device_chain(name, create);
346 return device_alias_get(name + 1);
348 dev = avl_find_element(&devices, name, dev, avl);
350 if (create > 1 && !dev->external) {
351 dev->external = true;
352 device_set_present(dev, true);
360 return device_create_default(name, create > 1);
364 device_delete(struct device *dev)
369 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
370 avl_delete(&devices, &dev->avl);
374 static int device_cleanup_cb(void *ctx, struct safe_list *list)
376 struct device_user *dep = container_of(list, struct device_user, list);
378 dep->cb(dep, DEV_EVENT_REMOVE);
384 void device_cleanup(struct device *dev)
386 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
387 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
388 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
392 static void __device_set_present(struct device *dev, bool state)
394 if (dev->present == state)
397 dev->present = state;
398 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
402 device_refresh_present(struct device *dev)
404 bool state = dev->sys_present;
406 if (dev->disabled || dev->deferred)
409 __device_set_present(dev, state);
412 void device_set_present(struct device *dev, bool state)
414 if (dev->sys_present == state)
417 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
418 dev->sys_present = state;
419 device_refresh_present(dev);
422 void device_set_link(struct device *dev, bool state)
424 if (dev->link_active == state)
427 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
429 dev->link_active = state;
430 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
433 void device_set_ifindex(struct device *dev, int ifindex)
435 if (dev->ifindex == ifindex)
438 dev->ifindex = ifindex;
439 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
442 static int device_refcount(struct device *dev)
444 struct list_head *list;
447 list_for_each(list, &dev->users.list)
450 list_for_each(list, &dev->aliases.list)
456 void device_add_user(struct device_user *dep, struct device *dev)
458 struct safe_list *head;
464 device_remove_user(dep);
472 head = &dev->aliases;
476 safe_list_add(&dep->list, head);
477 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
479 if (dep->cb && dev->present) {
480 dep->cb(dep, DEV_EVENT_ADD);
482 dep->cb(dep, DEV_EVENT_UP);
484 if (dev->link_active)
485 dep->cb(dep, DEV_EVENT_LINK_UP);
490 device_free(struct device *dev)
495 dev->type->free(dev);
500 __device_free_unused(struct device *dev)
502 if (!safe_list_empty(&dev->users) ||
503 !safe_list_empty(&dev->aliases) ||
504 dev->current_config || __devlock)
510 void device_remove_user(struct device_user *dep)
512 struct device *dev = dep->dev;
517 dep->hotplug = false;
521 safe_list_del(&dep->list);
523 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
524 __device_free_unused(dev);
528 device_free_unused(struct device *dev)
533 return __device_free_unused(dev);
535 avl_for_each_element_safe(&devices, dev, avl, tmp)
536 __device_free_unused(dev);
540 device_init_pending(void)
542 struct device *dev, *tmp;
544 avl_for_each_element_safe(&devices, dev, avl, tmp) {
545 if (!dev->config_pending)
548 dev->type->config_init(dev);
549 dev->config_pending = false;
553 static enum dev_change_type
554 device_reload_config(struct device *dev, struct blob_attr *attr)
556 struct blob_attr *tb[__DEV_ATTR_MAX];
557 const struct uci_blob_param_list *cfg = dev->type->config_params;
559 if (uci_blob_check_equal(dev->config, attr, cfg))
560 return DEV_CONFIG_NO_CHANGE;
562 if (cfg == &device_attr_list) {
563 memset(tb, 0, sizeof(tb));
566 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
567 blob_data(attr), blob_len(attr));
569 device_init_settings(dev, tb);
570 return DEV_CONFIG_RESTART;
572 return DEV_CONFIG_RECREATE;
576 device_set_config(struct device *dev, const struct device_type *type,
577 struct blob_attr *attr)
579 if (type != dev->type)
580 return DEV_CONFIG_RECREATE;
582 if (dev->type->reload)
583 return dev->type->reload(dev, attr);
585 return device_reload_config(dev, attr);
589 device_replace(struct device *dev, struct device *odev)
591 struct device_user *dep, *tmp;
592 bool present = odev->present;
595 device_set_present(odev, false);
597 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
599 safe_list_del(&dep->list);
600 safe_list_add(&dep->list, &dev->users);
606 device_set_present(dev, true);
610 device_reset_config(void)
614 avl_for_each_element(&devices, dev, avl)
615 dev->current_config = false;
619 device_reset_old(void)
621 struct device *dev, *tmp, *ndev;
623 avl_for_each_element_safe(&devices, dev, avl, tmp) {
624 if (dev->current_config || dev->default_config)
627 if (dev->type != &simple_device_type)
630 ndev = device_create_default(dev->ifname, dev->external);
631 device_replace(ndev, dev);
636 device_create(const char *name, const struct device_type *type,
637 struct blob_attr *config)
639 struct device *odev = NULL, *dev;
640 enum dev_change_type change;
642 config = blob_memdup(config);
646 odev = device_get(name, false);
648 odev->current_config = true;
649 change = device_set_config(odev, type, config);
650 if (odev->external) {
651 system_if_apply_settings(odev, &odev->settings, odev->settings.flags);
652 change = DEV_CONFIG_APPLIED;
655 case DEV_CONFIG_RESTART:
656 case DEV_CONFIG_APPLIED:
657 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
659 odev->config = config;
660 if (change == DEV_CONFIG_RESTART && odev->present) {
661 device_set_present(odev, false);
662 device_set_present(odev, true);
665 case DEV_CONFIG_NO_CHANGE:
666 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
669 case DEV_CONFIG_RECREATE:
670 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
675 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
677 dev = type->create(name, config);
681 dev->current_config = true;
682 dev->config = config;
684 device_replace(dev, odev);
686 if (!config_init && dev->config_pending)
687 type->config_init(dev);
693 device_dump_status(struct blob_buf *b, struct device *dev)
695 struct device_settings st;
699 avl_for_each_element(&devices, dev, avl) {
702 c = blobmsg_open_table(b, dev->ifname);
703 device_dump_status(b, dev);
704 blobmsg_close_table(b, c);
710 blobmsg_add_u8(b, "external", dev->external);
711 blobmsg_add_u8(b, "present", dev->present);
712 blobmsg_add_string(b, "type", dev->type->name);
717 blobmsg_add_u8(b, "up", !!dev->active);
718 blobmsg_add_u8(b, "carrier", !!dev->link_active);
720 if (dev->type->dump_info)
721 dev->type->dump_info(dev, b);
723 system_if_dump_info(dev, b);
726 device_merge_settings(dev, &st);
727 if (st.flags & DEV_OPT_MTU)
728 blobmsg_add_u32(b, "mtu", st.mtu);
729 if (st.flags & DEV_OPT_MACADDR)
730 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
731 if (st.flags & DEV_OPT_TXQUEUELEN)
732 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
733 if (st.flags & DEV_OPT_IPV6)
734 blobmsg_add_u8(b, "ipv6", st.ipv6);
735 if (st.flags & DEV_OPT_PROMISC)
736 blobmsg_add_u8(b, "promisc", st.promisc);
739 s = blobmsg_open_table(b, "statistics");
740 if (dev->type->dump_stats)
741 dev->type->dump_stats(dev, b);
743 system_if_dump_stats(dev, b);
744 blobmsg_close_table(b, s);