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 },
46 const struct uci_blob_param_list device_attr_list = {
47 .n_params = __DEV_ATTR_MAX,
51 static int __devlock = 0;
53 void device_lock(void)
58 void device_unlock(void)
62 device_free_unused(NULL);
65 static int set_device_state(struct device *dev, bool state)
68 /* Set ifindex for all devices being enabled so a valid */
69 /* ifindex is in place avoiding possible race conditions */
70 device_set_ifindex(dev, system_if_resolve(dev));
87 simple_device_set_state(struct device *dev, bool state)
92 pdev = dev->parent.dev;
94 pdev = system_if_get_parent(dev);
96 device_add_user(&dev->parent, pdev);
101 ret = device_claim(&dev->parent);
103 device_release(&dev->parent);
108 return set_device_state(dev, state);
111 static struct device *
112 simple_device_create(const char *name, struct blob_attr *attr)
114 struct blob_attr *tb[__DEV_ATTR_MAX];
115 struct device *dev = NULL;
117 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
118 dev = device_get(name, true);
122 dev->set_state = simple_device_set_state;
123 device_init_settings(dev, tb);
128 static void simple_device_free(struct device *dev)
131 device_remove_user(&dev->parent);
135 const struct device_type simple_device_type = {
136 .name = "Network device",
137 .config_params = &device_attr_list,
139 .create = simple_device_create,
140 .check_state = system_if_check,
141 .free = simple_device_free,
145 device_merge_settings(struct device *dev, struct device_settings *n)
147 struct device_settings *os = &dev->orig_settings;
148 struct device_settings *s = &dev->settings;
150 memset(n, 0, sizeof(*n));
151 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
152 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
153 s->txqueuelen : os->txqueuelen;
155 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
157 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
158 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
159 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
160 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
161 n->flags = s->flags | os->flags;
165 device_init_settings(struct device *dev, struct blob_attr **tb)
167 struct device_settings *s = &dev->settings;
168 struct blob_attr *cur;
169 struct ether_addr *ea;
170 bool disabled = false;
173 if ((cur = tb[DEV_ATTR_ENABLED]))
174 disabled = !blobmsg_get_bool(cur);
176 if ((cur = tb[DEV_ATTR_MTU])) {
177 s->mtu = blobmsg_get_u32(cur);
178 s->flags |= DEV_OPT_MTU;
181 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
182 s->txqueuelen = blobmsg_get_u32(cur);
183 s->flags |= DEV_OPT_TXQUEUELEN;
186 if ((cur = tb[DEV_ATTR_MACADDR])) {
187 ea = ether_aton(blobmsg_data(cur));
189 memcpy(s->macaddr, ea, 6);
190 s->flags |= DEV_OPT_MACADDR;
194 if ((cur = tb[DEV_ATTR_IPV6])) {
195 s->ipv6 = blobmsg_get_bool(cur);
196 s->flags |= DEV_OPT_IPV6;
199 if ((cur = tb[DEV_ATTR_PROMISC])) {
200 s->promisc = blobmsg_get_bool(cur);
201 s->flags |= DEV_OPT_PROMISC;
204 if ((cur = tb[DEV_ATTR_RPFILTER])) {
205 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
206 s->flags |= DEV_OPT_RPFILTER;
208 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
211 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
212 s->acceptlocal = blobmsg_get_bool(cur);
213 s->flags |= DEV_OPT_ACCEPTLOCAL;
216 device_set_disabled(dev, disabled);
219 static void __init dev_init(void)
221 avl_init(&devices, avl_strcmp, true, NULL);
224 static int device_broadcast_cb(void *ctx, struct safe_list *list)
226 struct device_user *dep = container_of(list, struct device_user, list);
229 /* device might have been removed by an earlier callback */
238 void device_broadcast_event(struct device *dev, enum device_event ev)
242 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
243 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
246 int device_claim(struct device_user *dep)
248 struct device *dev = dep->dev;
255 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
256 if (++dev->active != 1)
259 device_broadcast_event(dev, DEV_EVENT_SETUP);
260 ret = dev->set_state(dev, true);
262 device_broadcast_event(dev, DEV_EVENT_UP);
264 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
266 dep->claimed = false;
272 void device_release(struct device_user *dep)
274 struct device *dev = dep->dev;
279 dep->claimed = false;
281 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
282 assert(dev->active >= 0);
287 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
289 dev->set_state(dev, false);
290 device_broadcast_event(dev, DEV_EVENT_DOWN);
293 int device_check_state(struct device *dev)
295 if (!dev->type->check_state)
296 return simple_device_type.check_state(dev);
298 return dev->type->check_state(dev);
301 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
307 strncpy(dev->ifname, name, IFNAMSIZ);
309 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
310 INIT_SAFE_LIST(&dev->users);
311 INIT_SAFE_LIST(&dev->aliases);
315 dev->set_state = set_device_state;
318 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
322 device_init_virtual(dev, type, ifname);
324 dev->avl.key = dev->ifname;
326 ret = avl_insert(&devices, &dev->avl);
330 system_if_clear_state(dev);
331 device_check_state(dev);
336 static struct device *
337 device_create_default(const char *name, bool external)
341 if (!external && system_if_force_external(name))
344 D(DEVICE, "Create simple device '%s'\n", name);
345 dev = calloc(1, sizeof(*dev));
346 dev->external = external;
347 dev->set_state = simple_device_set_state;
348 device_init(dev, &simple_device_type, name);
349 dev->default_config = true;
354 device_get(const char *name, int create)
358 if (strchr(name, '.'))
359 return get_vlan_device_chain(name, create);
362 return device_alias_get(name + 1);
364 dev = avl_find_element(&devices, name, dev, avl);
366 if (create > 1 && !dev->external) {
367 dev->external = true;
368 device_set_present(dev, true);
376 return device_create_default(name, create > 1);
380 device_delete(struct device *dev)
385 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
386 avl_delete(&devices, &dev->avl);
390 static int device_cleanup_cb(void *ctx, struct safe_list *list)
392 struct device_user *dep = container_of(list, struct device_user, list);
394 dep->cb(dep, DEV_EVENT_REMOVE);
400 void device_cleanup(struct device *dev)
402 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
403 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
404 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
408 static void __device_set_present(struct device *dev, bool state)
410 if (dev->present == state)
413 dev->present = state;
414 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
418 device_refresh_present(struct device *dev)
420 bool state = dev->sys_present;
422 if (dev->disabled || dev->deferred)
425 __device_set_present(dev, state);
428 void device_set_present(struct device *dev, bool state)
430 if (dev->sys_present == state)
433 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
434 dev->sys_present = state;
435 device_refresh_present(dev);
438 void device_set_link(struct device *dev, bool state)
440 if (dev->link_active == state)
443 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
445 dev->link_active = state;
446 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
449 void device_set_ifindex(struct device *dev, int ifindex)
451 if (dev->ifindex == ifindex)
454 dev->ifindex = ifindex;
455 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
458 static int device_refcount(struct device *dev)
460 struct list_head *list;
463 list_for_each(list, &dev->users.list)
466 list_for_each(list, &dev->aliases.list)
472 void device_add_user(struct device_user *dep, struct device *dev)
474 struct safe_list *head;
480 device_remove_user(dep);
488 head = &dev->aliases;
492 safe_list_add(&dep->list, head);
493 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
495 if (dep->cb && dev->present) {
496 dep->cb(dep, DEV_EVENT_ADD);
498 dep->cb(dep, DEV_EVENT_UP);
500 if (dev->link_active)
501 dep->cb(dep, DEV_EVENT_LINK_UP);
506 device_free(struct device *dev)
511 dev->type->free(dev);
516 __device_free_unused(struct device *dev)
518 if (!safe_list_empty(&dev->users) ||
519 !safe_list_empty(&dev->aliases) ||
520 dev->current_config || __devlock)
526 void device_remove_user(struct device_user *dep)
528 struct device *dev = dep->dev;
533 dep->hotplug = false;
537 safe_list_del(&dep->list);
539 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
540 __device_free_unused(dev);
544 device_free_unused(struct device *dev)
549 return __device_free_unused(dev);
551 avl_for_each_element_safe(&devices, dev, avl, tmp)
552 __device_free_unused(dev);
556 device_init_pending(void)
558 struct device *dev, *tmp;
560 avl_for_each_element_safe(&devices, dev, avl, tmp) {
561 if (!dev->config_pending)
564 dev->type->config_init(dev);
565 dev->config_pending = false;
569 static enum dev_change_type
570 device_reload_config(struct device *dev, struct blob_attr *attr)
572 struct blob_attr *tb[__DEV_ATTR_MAX];
573 const struct uci_blob_param_list *cfg = dev->type->config_params;
575 if (uci_blob_check_equal(dev->config, attr, cfg))
576 return DEV_CONFIG_NO_CHANGE;
578 if (cfg == &device_attr_list) {
579 memset(tb, 0, sizeof(tb));
582 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
583 blob_data(attr), blob_len(attr));
585 device_init_settings(dev, tb);
586 return DEV_CONFIG_RESTART;
588 return DEV_CONFIG_RECREATE;
592 device_set_config(struct device *dev, const struct device_type *type,
593 struct blob_attr *attr)
595 if (type != dev->type)
596 return DEV_CONFIG_RECREATE;
598 if (dev->type->reload)
599 return dev->type->reload(dev, attr);
601 return device_reload_config(dev, attr);
605 device_replace(struct device *dev, struct device *odev)
607 struct device_user *dep, *tmp;
608 bool present = odev->present;
611 device_set_present(odev, false);
613 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
615 safe_list_del(&dep->list);
616 safe_list_add(&dep->list, &dev->users);
622 device_set_present(dev, true);
626 device_reset_config(void)
630 avl_for_each_element(&devices, dev, avl)
631 dev->current_config = false;
635 device_reset_old(void)
637 struct device *dev, *tmp, *ndev;
639 avl_for_each_element_safe(&devices, dev, avl, tmp) {
640 if (dev->current_config || dev->default_config)
643 if (dev->type != &simple_device_type)
646 ndev = device_create_default(dev->ifname, dev->external);
647 device_replace(ndev, dev);
652 device_create(const char *name, const struct device_type *type,
653 struct blob_attr *config)
655 struct device *odev = NULL, *dev;
656 enum dev_change_type change;
658 config = blob_memdup(config);
662 odev = device_get(name, false);
664 odev->current_config = true;
665 change = device_set_config(odev, type, config);
666 if (odev->external) {
667 system_if_apply_settings(odev, &odev->settings, odev->settings.flags);
668 change = DEV_CONFIG_APPLIED;
671 case DEV_CONFIG_RESTART:
672 case DEV_CONFIG_APPLIED:
673 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
675 odev->config = config;
676 if (change == DEV_CONFIG_RESTART && odev->present) {
677 device_set_present(odev, false);
678 device_set_present(odev, true);
681 case DEV_CONFIG_NO_CHANGE:
682 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
685 case DEV_CONFIG_RECREATE:
686 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
691 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
693 dev = type->create(name, config);
697 dev->current_config = true;
698 dev->config = config;
700 device_replace(dev, odev);
702 if (!config_init && dev->config_pending)
703 type->config_init(dev);
709 device_dump_status(struct blob_buf *b, struct device *dev)
711 struct device_settings st;
715 avl_for_each_element(&devices, dev, avl) {
718 c = blobmsg_open_table(b, dev->ifname);
719 device_dump_status(b, dev);
720 blobmsg_close_table(b, c);
726 blobmsg_add_u8(b, "external", dev->external);
727 blobmsg_add_u8(b, "present", dev->present);
728 blobmsg_add_string(b, "type", dev->type->name);
733 blobmsg_add_u8(b, "up", !!dev->active);
734 blobmsg_add_u8(b, "carrier", !!dev->link_active);
736 if (dev->type->dump_info)
737 dev->type->dump_info(dev, b);
739 system_if_dump_info(dev, b);
742 device_merge_settings(dev, &st);
743 if (st.flags & DEV_OPT_MTU)
744 blobmsg_add_u32(b, "mtu", st.mtu);
745 if (st.flags & DEV_OPT_MACADDR)
746 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
747 if (st.flags & DEV_OPT_TXQUEUELEN)
748 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
749 if (st.flags & DEV_OPT_IPV6)
750 blobmsg_add_u8(b, "ipv6", st.ipv6);
751 if (st.flags & DEV_OPT_PROMISC)
752 blobmsg_add_u8(b, "promisc", st.promisc);
753 if (st.flags & DEV_OPT_RPFILTER)
754 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
755 if (st.flags & DEV_OPT_ACCEPTLOCAL)
756 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
759 s = blobmsg_open_table(b, "statistics");
760 if (dev->type->dump_stats)
761 dev->type->dump_stats(dev, b);
763 system_if_dump_stats(dev, b);
764 blobmsg_close_table(b, s);