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)
77 simple_device_set_state(struct device *dev, bool state)
82 pdev = dev->parent.dev;
84 pdev = system_if_get_parent(dev);
86 device_add_user(&dev->parent, pdev);
91 ret = device_claim(&dev->parent);
93 device_release(&dev->parent);
98 return set_device_state(dev, state);
101 static struct device *
102 simple_device_create(const char *name, struct blob_attr *attr)
104 struct blob_attr *tb[__DEV_ATTR_MAX];
105 struct device *dev = NULL;
107 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
108 dev = device_get(name, true);
112 dev->set_state = simple_device_set_state;
113 device_init_settings(dev, tb);
118 static void simple_device_free(struct device *dev)
121 device_remove_user(&dev->parent);
125 const struct device_type simple_device_type = {
126 .name = "Network device",
127 .config_params = &device_attr_list,
129 .create = simple_device_create,
130 .check_state = system_if_check,
131 .free = simple_device_free,
135 device_merge_settings(struct device *dev, struct device_settings *n)
137 struct device_settings *os = &dev->orig_settings;
138 struct device_settings *s = &dev->settings;
140 memset(n, 0, sizeof(*n));
141 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
142 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
143 s->txqueuelen : os->txqueuelen;
145 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
147 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
148 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
149 n->flags = s->flags | os->flags;
153 device_init_settings(struct device *dev, struct blob_attr **tb)
155 struct device_settings *s = &dev->settings;
156 struct blob_attr *cur;
157 struct ether_addr *ea;
158 bool disabled = false;
161 if ((cur = tb[DEV_ATTR_ENABLED]))
162 disabled = !blobmsg_get_bool(cur);
164 if ((cur = tb[DEV_ATTR_MTU])) {
165 s->mtu = blobmsg_get_u32(cur);
166 s->flags |= DEV_OPT_MTU;
169 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
170 s->txqueuelen = blobmsg_get_u32(cur);
171 s->flags |= DEV_OPT_TXQUEUELEN;
174 if ((cur = tb[DEV_ATTR_MACADDR])) {
175 ea = ether_aton(blobmsg_data(cur));
177 memcpy(s->macaddr, ea, 6);
178 s->flags |= DEV_OPT_MACADDR;
182 if ((cur = tb[DEV_ATTR_IPV6])) {
183 s->ipv6 = blobmsg_get_bool(cur);
184 s->flags |= DEV_OPT_IPV6;
187 if ((cur = tb[DEV_ATTR_PROMISC])) {
188 s->promisc = blobmsg_get_bool(cur);
189 s->flags |= DEV_OPT_PROMISC;
192 device_set_disabled(dev, disabled);
195 static void __init dev_init(void)
197 avl_init(&devices, avl_strcmp, true, NULL);
200 static int device_broadcast_cb(void *ctx, struct safe_list *list)
202 struct device_user *dep = container_of(list, struct device_user, list);
205 /* device might have been removed by an earlier callback */
214 void device_broadcast_event(struct device *dev, enum device_event ev)
218 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
219 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
222 int device_claim(struct device_user *dep)
224 struct device *dev = dep->dev;
231 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
232 if (++dev->active != 1)
235 device_broadcast_event(dev, DEV_EVENT_SETUP);
236 ret = dev->set_state(dev, true);
238 device_broadcast_event(dev, DEV_EVENT_UP);
240 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
242 dep->claimed = false;
248 void device_release(struct device_user *dep)
250 struct device *dev = dep->dev;
255 dep->claimed = false;
257 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
258 assert(dev->active >= 0);
263 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
265 dev->set_state(dev, false);
266 device_broadcast_event(dev, DEV_EVENT_DOWN);
269 int device_check_state(struct device *dev)
271 if (!dev->type->check_state)
272 return simple_device_type.check_state(dev);
274 return dev->type->check_state(dev);
277 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
283 strncpy(dev->ifname, name, IFNAMSIZ);
285 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
286 INIT_SAFE_LIST(&dev->users);
287 INIT_SAFE_LIST(&dev->aliases);
291 dev->set_state = set_device_state;
294 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
298 device_init_virtual(dev, type, ifname);
300 dev->avl.key = dev->ifname;
302 ret = avl_insert(&devices, &dev->avl);
306 system_if_clear_state(dev);
307 device_check_state(dev);
312 static struct device *
313 device_create_default(const char *name, bool external)
317 if (!external && system_if_force_external(name))
320 D(DEVICE, "Create simple device '%s'\n", name);
321 dev = calloc(1, sizeof(*dev));
322 dev->external = external;
323 dev->set_state = simple_device_set_state;
324 device_init(dev, &simple_device_type, name);
325 dev->default_config = true;
330 device_get(const char *name, int create)
334 if (strchr(name, '.'))
335 return get_vlan_device_chain(name, create);
338 return device_alias_get(name + 1);
340 dev = avl_find_element(&devices, name, dev, avl);
342 if (create > 1 && !dev->external) {
343 dev->external = true;
344 device_set_present(dev, true);
352 return device_create_default(name, create > 1);
356 device_delete(struct device *dev)
361 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
362 avl_delete(&devices, &dev->avl);
366 static int device_cleanup_cb(void *ctx, struct safe_list *list)
368 struct device_user *dep = container_of(list, struct device_user, list);
370 dep->cb(dep, DEV_EVENT_REMOVE);
376 void device_cleanup(struct device *dev)
378 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
379 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
380 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
384 static void __device_set_present(struct device *dev, bool state)
386 if (dev->present == state)
389 dev->present = state;
390 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
394 device_refresh_present(struct device *dev)
396 bool state = dev->sys_present;
398 if (dev->disabled || dev->deferred)
401 __device_set_present(dev, state);
404 void device_set_present(struct device *dev, bool state)
406 if (dev->sys_present == state)
409 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
410 dev->sys_present = state;
411 device_refresh_present(dev);
414 void device_set_link(struct device *dev, bool state)
416 if (dev->link_active == state)
419 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
421 dev->link_active = state;
422 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
425 void device_set_ifindex(struct device *dev, int ifindex)
427 if (dev->ifindex == ifindex)
430 dev->ifindex = ifindex;
431 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
434 static int device_refcount(struct device *dev)
436 struct list_head *list;
439 list_for_each(list, &dev->users.list)
442 list_for_each(list, &dev->aliases.list)
448 void device_add_user(struct device_user *dep, struct device *dev)
450 struct safe_list *head;
456 device_remove_user(dep);
464 head = &dev->aliases;
468 safe_list_add(&dep->list, head);
469 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
471 if (dep->cb && dev->present) {
472 dep->cb(dep, DEV_EVENT_ADD);
474 dep->cb(dep, DEV_EVENT_UP);
476 if (dev->link_active)
477 dep->cb(dep, DEV_EVENT_LINK_UP);
482 device_free(struct device *dev)
487 dev->type->free(dev);
492 __device_free_unused(struct device *dev)
494 if (!safe_list_empty(&dev->users) ||
495 !safe_list_empty(&dev->aliases) ||
496 dev->current_config || __devlock)
502 void device_remove_user(struct device_user *dep)
504 struct device *dev = dep->dev;
509 dep->hotplug = false;
513 safe_list_del(&dep->list);
515 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
516 __device_free_unused(dev);
520 device_free_unused(struct device *dev)
525 return __device_free_unused(dev);
527 avl_for_each_element_safe(&devices, dev, avl, tmp)
528 __device_free_unused(dev);
532 device_init_pending(void)
534 struct device *dev, *tmp;
536 avl_for_each_element_safe(&devices, dev, avl, tmp) {
537 if (!dev->config_pending)
540 dev->type->config_init(dev);
541 dev->config_pending = false;
545 static enum dev_change_type
546 device_reload_config(struct device *dev, struct blob_attr *attr)
548 struct blob_attr *tb[__DEV_ATTR_MAX];
549 const struct uci_blob_param_list *cfg = dev->type->config_params;
551 if (uci_blob_check_equal(dev->config, attr, cfg))
552 return DEV_CONFIG_NO_CHANGE;
554 if (cfg == &device_attr_list) {
555 memset(tb, 0, sizeof(tb));
558 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
559 blob_data(attr), blob_len(attr));
561 device_init_settings(dev, tb);
562 return DEV_CONFIG_RESTART;
564 return DEV_CONFIG_RECREATE;
568 device_set_config(struct device *dev, const struct device_type *type,
569 struct blob_attr *attr)
571 if (type != dev->type)
572 return DEV_CONFIG_RECREATE;
574 if (dev->type->reload)
575 return dev->type->reload(dev, attr);
577 return device_reload_config(dev, attr);
581 device_replace(struct device *dev, struct device *odev)
583 struct device_user *dep, *tmp;
584 bool present = odev->present;
587 device_set_present(odev, false);
589 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
591 safe_list_del(&dep->list);
592 safe_list_add(&dep->list, &dev->users);
598 device_set_present(dev, true);
602 device_reset_config(void)
606 avl_for_each_element(&devices, dev, avl)
607 dev->current_config = false;
611 device_reset_old(void)
613 struct device *dev, *tmp, *ndev;
615 avl_for_each_element_safe(&devices, dev, avl, tmp) {
616 if (dev->current_config || dev->default_config)
619 if (dev->type != &simple_device_type)
622 ndev = device_create_default(dev->ifname, dev->external);
623 device_replace(ndev, dev);
628 device_create(const char *name, const struct device_type *type,
629 struct blob_attr *config)
631 struct device *odev = NULL, *dev;
632 enum dev_change_type change;
634 config = blob_memdup(config);
638 odev = device_get(name, false);
640 odev->current_config = true;
641 change = device_set_config(odev, type, config);
642 if (odev->external) {
643 system_if_apply_settings(odev, &odev->settings, odev->settings.flags);
644 change = DEV_CONFIG_APPLIED;
647 case DEV_CONFIG_RESTART:
648 case DEV_CONFIG_APPLIED:
649 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
651 odev->config = config;
652 if (change == DEV_CONFIG_RESTART && odev->present) {
653 device_set_present(odev, false);
654 device_set_present(odev, true);
657 case DEV_CONFIG_NO_CHANGE:
658 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
661 case DEV_CONFIG_RECREATE:
662 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
667 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
669 dev = type->create(name, config);
673 dev->current_config = true;
674 dev->config = config;
676 device_replace(dev, odev);
678 if (!config_init && dev->config_pending)
679 type->config_init(dev);
685 device_dump_status(struct blob_buf *b, struct device *dev)
687 struct device_settings st;
691 avl_for_each_element(&devices, dev, avl) {
694 c = blobmsg_open_table(b, dev->ifname);
695 device_dump_status(b, dev);
696 blobmsg_close_table(b, c);
702 blobmsg_add_u8(b, "external", dev->external);
703 blobmsg_add_u8(b, "present", dev->present);
704 blobmsg_add_string(b, "type", dev->type->name);
709 blobmsg_add_u8(b, "up", !!dev->active);
710 blobmsg_add_u8(b, "carrier", !!dev->link_active);
712 if (dev->type->dump_info)
713 dev->type->dump_info(dev, b);
715 system_if_dump_info(dev, b);
718 device_merge_settings(dev, &st);
719 if (st.flags & DEV_OPT_MTU)
720 blobmsg_add_u32(b, "mtu", st.mtu);
721 if (st.flags & DEV_OPT_MACADDR)
722 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
723 if (st.flags & DEV_OPT_TXQUEUELEN)
724 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
725 if (st.flags & DEV_OPT_IPV6)
726 blobmsg_add_u8(b, "ipv6", st.ipv6);
727 if (st.flags & DEV_OPT_PROMISC)
728 blobmsg_add_u8(b, "promisc", st.promisc);
731 s = blobmsg_open_table(b, "statistics");
732 if (dev->type->dump_stats)
733 dev->type->dump_stats(dev, b);
735 system_if_dump_stats(dev, b);
736 blobmsg_close_table(b, s);