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] = { "type", BLOBMSG_TYPE_STRING },
35 [DEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
36 [DEV_ATTR_MTU] = { "mtu", BLOBMSG_TYPE_INT32 },
37 [DEV_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
38 [DEV_ATTR_TXQUEUELEN] = { "txqueuelen", BLOBMSG_TYPE_INT32 },
39 [DEV_ATTR_ENABLED] = { "enabled", BLOBMSG_TYPE_BOOL },
42 const struct config_param_list device_attr_list = {
43 .n_params = __DEV_ATTR_MAX,
47 static int __devlock = 0;
49 void device_lock(void)
54 void device_unlock(void)
58 device_free_unused(NULL);
61 static int set_device_state(struct device *dev, bool state)
72 simple_device_set_state(struct device *dev, bool state)
77 pdev = dev->parent.dev;
79 pdev = system_if_get_parent(dev);
81 device_add_user(&dev->parent, pdev);
86 ret = device_claim(&dev->parent);
88 device_release(&dev->parent);
93 return set_device_state(dev, state);
96 static struct device *
97 simple_device_create(const char *name, struct blob_attr *attr)
99 struct blob_attr *tb[__DEV_ATTR_MAX];
100 struct device *dev = NULL;
102 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
103 dev = device_get(name, true);
107 dev->set_state = simple_device_set_state;
108 device_init_settings(dev, tb);
113 static void simple_device_free(struct device *dev)
116 device_remove_user(&dev->parent);
120 const struct device_type simple_device_type = {
121 .name = "Network device",
122 .config_params = &device_attr_list,
124 .create = simple_device_create,
125 .check_state = system_if_check,
126 .free = simple_device_free,
130 device_merge_settings(struct device *dev, struct device_settings *n)
132 struct device_settings *os = &dev->orig_settings;
133 struct device_settings *s = &dev->settings;
135 memset(n, 0, sizeof(*n));
136 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
137 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
138 s->txqueuelen : os->txqueuelen;
140 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
142 n->flags = s->flags | os->flags;
146 device_init_settings(struct device *dev, struct blob_attr **tb)
148 struct device_settings *s = &dev->settings;
149 struct blob_attr *cur;
150 struct ether_addr *ea;
151 bool disabled = false;
154 if ((cur = tb[DEV_ATTR_ENABLED]))
155 disabled = !blobmsg_get_bool(cur);
157 if ((cur = tb[DEV_ATTR_MTU])) {
158 s->mtu = blobmsg_get_u32(cur);
159 s->flags |= DEV_OPT_MTU;
162 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
163 s->txqueuelen = blobmsg_get_u32(cur);
164 s->flags |= DEV_OPT_TXQUEUELEN;
167 if ((cur = tb[DEV_ATTR_MACADDR])) {
168 ea = ether_aton(blobmsg_data(cur));
170 memcpy(s->macaddr, ea, 6);
171 s->flags |= DEV_OPT_MACADDR;
175 device_set_disabled(dev, disabled);
178 static void __init dev_init(void)
180 avl_init(&devices, avl_strcmp, true, NULL);
184 static void __device_broadcast_event(struct list_head *head, enum device_event ev)
186 struct device_user *dep;
187 static uint8_t idx[__DEV_EVENT_MAX];
194 list_for_each_entry(dep, head, list) {
198 if (dep->ev_idx[ev] == idx[ev])
202 dep->ev_idx[ev] = idx[ev];
209 void device_broadcast_event(struct device *dev, enum device_event ev)
211 __device_broadcast_event(&dev->aliases, ev);
212 __device_broadcast_event(&dev->users, ev);
215 int device_claim(struct device_user *dep)
217 struct device *dev = dep->dev;
224 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
225 if (++dev->active != 1)
228 device_broadcast_event(dev, DEV_EVENT_SETUP);
229 ret = dev->set_state(dev, true);
231 device_broadcast_event(dev, DEV_EVENT_UP);
233 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
235 dep->claimed = false;
241 void device_release(struct device_user *dep)
243 struct device *dev = dep->dev;
248 dep->claimed = false;
250 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
251 assert(dev->active >= 0);
256 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
258 dev->set_state(dev, false);
259 device_broadcast_event(dev, DEV_EVENT_DOWN);
262 int device_check_state(struct device *dev)
264 if (!dev->type->check_state)
267 return dev->type->check_state(dev);
270 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
276 strncpy(dev->ifname, name, IFNAMSIZ);
278 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
279 INIT_LIST_HEAD(&dev->users);
280 INIT_LIST_HEAD(&dev->aliases);
284 dev->set_state = set_device_state;
287 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
291 device_init_virtual(dev, type, ifname);
293 dev->avl.key = dev->ifname;
295 ret = avl_insert(&devices, &dev->avl);
299 system_if_clear_state(dev);
300 device_check_state(dev);
305 static struct device *
306 device_create_default(const char *name, bool external)
310 if (!external && system_if_force_external(name))
313 D(DEVICE, "Create simple device '%s'\n", name);
314 dev = calloc(1, sizeof(*dev));
315 dev->external = external;
316 dev->set_state = simple_device_set_state;
317 device_init(dev, &simple_device_type, name);
318 dev->default_config = true;
323 device_get(const char *name, int create)
327 if (strchr(name, '.'))
328 return get_vlan_device_chain(name, create);
331 return device_alias_get(name + 1);
333 dev = avl_find_element(&devices, name, dev, avl);
335 if (create > 1 && !dev->external) {
336 dev->external = true;
337 device_set_present(dev, true);
345 return device_create_default(name, create > 1);
349 device_delete(struct device *dev)
354 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
355 avl_delete(&devices, &dev->avl);
359 void device_cleanup(struct device *dev)
361 struct device_user *dep, *tmp;
363 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
364 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
368 dep->cb(dep, DEV_EVENT_REMOVE);
375 static void __device_set_present(struct device *dev, bool state)
377 if (dev->present == state)
380 dev->present = state;
381 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
385 device_refresh_present(struct device *dev)
387 bool state = dev->sys_present;
389 if (dev->disabled || dev->deferred)
392 __device_set_present(dev, state);
395 void device_set_present(struct device *dev, bool state)
397 if (dev->sys_present == state)
400 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
401 dev->sys_present = state;
402 device_refresh_present(dev);
405 static int device_refcount(struct device *dev)
407 struct list_head *list;
410 list_for_each(list, &dev->users)
416 void device_add_user(struct device_user *dep, struct device *dev)
418 struct list_head *head;
421 device_remove_user(dep);
429 head = &dev->aliases;
432 list_add_tail(&dep->list, head);
433 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
435 if (dep->cb && dev->present) {
436 dep->cb(dep, DEV_EVENT_ADD);
438 dep->cb(dep, DEV_EVENT_UP);
443 device_free(struct device *dev)
448 dev->type->free(dev);
453 __device_free_unused(struct device *dev)
455 if (!list_empty(&dev->users) || dev->current_config || __devlock)
461 void device_remove_user(struct device_user *dep)
463 struct device *dev = dep->dev;
468 dep->hotplug = false;
472 list_del(&dep->list);
474 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
475 __device_free_unused(dev);
479 device_free_unused(struct device *dev)
484 return __device_free_unused(dev);
486 avl_for_each_element_safe(&devices, dev, avl, tmp)
487 __device_free_unused(dev);
491 device_init_pending(void)
493 struct device *dev, *tmp;
495 avl_for_each_element_safe(&devices, dev, avl, tmp) {
496 if (!dev->config_pending)
499 dev->type->config_init(dev);
500 dev->config_pending = false;
504 static enum dev_change_type
505 device_reload_config(struct device *dev, struct blob_attr *attr)
507 struct blob_attr *tb[__DEV_ATTR_MAX];
508 const struct config_param_list *cfg = dev->type->config_params;
510 if (config_check_equal(dev->config, attr, cfg))
511 return DEV_CONFIG_NO_CHANGE;
513 if (cfg == &device_attr_list) {
514 memset(tb, 0, sizeof(tb));
517 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
518 blob_data(attr), blob_len(attr));
520 device_init_settings(dev, tb);
521 return DEV_CONFIG_RESTART;
523 return DEV_CONFIG_RECREATE;
527 device_set_config(struct device *dev, const struct device_type *type,
528 struct blob_attr *attr)
530 if (type != dev->type)
531 return DEV_CONFIG_RECREATE;
533 if (dev->type->reload)
534 return dev->type->reload(dev, attr);
536 return device_reload_config(dev, attr);
540 device_replace(struct device *dev, struct device *odev)
542 struct device_user *dep, *tmp;
543 bool present = odev->present;
546 device_set_present(odev, false);
548 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
550 list_move_tail(&dep->list, &dev->users);
556 device_set_present(dev, true);
560 device_reset_config(void)
564 avl_for_each_element(&devices, dev, avl)
565 dev->current_config = false;
569 device_reset_old(void)
571 struct device *dev, *tmp, *ndev;
573 avl_for_each_element_safe(&devices, dev, avl, tmp) {
574 if (dev->current_config || dev->default_config)
577 if (dev->type != &simple_device_type)
580 ndev = device_create_default(dev->ifname, dev->external);
581 device_replace(ndev, dev);
586 device_create(const char *name, const struct device_type *type,
587 struct blob_attr *config)
589 struct device *odev = NULL, *dev;
590 enum dev_change_type change;
592 config = config_memdup(config);
596 odev = device_get(name, false);
598 odev->current_config = true;
599 change = device_set_config(odev, type, config);
600 if (odev->external) {
601 system_if_apply_settings(odev, &odev->settings);
602 change = DEV_CONFIG_APPLIED;
605 case DEV_CONFIG_RESTART:
606 case DEV_CONFIG_APPLIED:
607 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
609 odev->config = config;
610 if (change == DEV_CONFIG_RESTART && odev->present) {
611 device_set_present(odev, false);
612 device_set_present(odev, true);
615 case DEV_CONFIG_NO_CHANGE:
616 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
619 case DEV_CONFIG_RECREATE:
620 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
625 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
627 dev = type->create(name, config);
631 dev->current_config = true;
632 dev->config = config;
634 device_replace(dev, odev);
636 if (!config_init && dev->config_pending)
637 type->config_init(dev);
643 device_dump_status(struct blob_buf *b, struct device *dev)
645 struct device_settings st;
649 avl_for_each_element(&devices, dev, avl) {
652 c = blobmsg_open_table(b, dev->ifname);
653 device_dump_status(b, dev);
654 blobmsg_close_table(b, c);
660 blobmsg_add_u8(b, "external", dev->external);
661 blobmsg_add_u8(b, "present", dev->present);
662 blobmsg_add_string(b, "type", dev->type->name);
667 blobmsg_add_u8(b, "up", !!dev->active);
668 if (dev->type->dump_info)
669 dev->type->dump_info(dev, b);
671 system_if_dump_info(dev, b);
674 device_merge_settings(dev, &st);
675 if (st.flags & DEV_OPT_MTU)
676 blobmsg_add_u32(b, "mtu", st.mtu);
677 if (st.flags & DEV_OPT_MACADDR)
678 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
679 if (st.flags & DEV_OPT_TXQUEUELEN)
680 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
683 s = blobmsg_open_table(b, "statistics");
684 if (dev->type->dump_stats)
685 dev->type->dump_stats(dev, b);
687 system_if_dump_stats(dev, b);
688 blobmsg_close_table(b, s);