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 },
42 const struct uci_blob_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);
183 static int device_broadcast_cb(void *ctx, struct safe_list *list)
185 struct device_user *dep = container_of(list, struct device_user, list);
188 /* device might have been removed by an earlier callback */
197 void device_broadcast_event(struct device *dev, enum device_event ev)
201 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
202 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
205 int device_claim(struct device_user *dep)
207 struct device *dev = dep->dev;
214 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
215 if (++dev->active != 1)
218 device_broadcast_event(dev, DEV_EVENT_SETUP);
219 ret = dev->set_state(dev, true);
221 device_broadcast_event(dev, DEV_EVENT_UP);
223 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
225 dep->claimed = false;
231 void device_release(struct device_user *dep)
233 struct device *dev = dep->dev;
238 dep->claimed = false;
240 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
241 assert(dev->active >= 0);
246 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
248 dev->set_state(dev, false);
249 device_broadcast_event(dev, DEV_EVENT_DOWN);
252 int device_check_state(struct device *dev)
254 if (!dev->type->check_state)
257 return dev->type->check_state(dev);
260 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
266 strncpy(dev->ifname, name, IFNAMSIZ);
268 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
269 INIT_SAFE_LIST(&dev->users);
270 INIT_SAFE_LIST(&dev->aliases);
274 dev->set_state = set_device_state;
277 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
281 device_init_virtual(dev, type, ifname);
283 dev->avl.key = dev->ifname;
285 ret = avl_insert(&devices, &dev->avl);
289 system_if_clear_state(dev);
290 device_check_state(dev);
295 static struct device *
296 device_create_default(const char *name, bool external)
300 if (!external && system_if_force_external(name))
303 D(DEVICE, "Create simple device '%s'\n", name);
304 dev = calloc(1, sizeof(*dev));
305 dev->external = external;
306 dev->set_state = simple_device_set_state;
307 device_init(dev, &simple_device_type, name);
308 dev->default_config = true;
313 device_get(const char *name, int create)
317 if (strchr(name, '.'))
318 return get_vlan_device_chain(name, create);
321 return device_alias_get(name + 1);
323 dev = avl_find_element(&devices, name, dev, avl);
325 if (create > 1 && !dev->external) {
326 dev->external = true;
327 device_set_present(dev, true);
335 return device_create_default(name, create > 1);
339 device_delete(struct device *dev)
344 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
345 avl_delete(&devices, &dev->avl);
349 static int device_cleanup_cb(void *ctx, struct safe_list *list)
351 struct device_user *dep = container_of(list, struct device_user, list);
353 dep->cb(dep, DEV_EVENT_REMOVE);
359 void device_cleanup(struct device *dev)
361 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
362 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
363 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
367 static void __device_set_present(struct device *dev, bool state)
369 if (dev->present == state)
372 dev->present = state;
373 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
377 device_refresh_present(struct device *dev)
379 bool state = dev->sys_present;
381 if (dev->disabled || dev->deferred)
384 __device_set_present(dev, state);
387 void device_set_present(struct device *dev, bool state)
389 if (dev->sys_present == state)
392 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
393 dev->sys_present = state;
394 device_refresh_present(dev);
397 static int device_refcount(struct device *dev)
399 struct list_head *list;
402 list_for_each(list, &dev->users.list)
405 list_for_each(list, &dev->aliases.list)
411 void device_add_user(struct device_user *dep, struct device *dev)
413 struct safe_list *head;
419 device_remove_user(dep);
427 head = &dev->aliases;
431 safe_list_add(&dep->list, head);
432 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
434 if (dep->cb && dev->present) {
435 dep->cb(dep, DEV_EVENT_ADD);
437 dep->cb(dep, DEV_EVENT_UP);
442 device_free(struct device *dev)
447 dev->type->free(dev);
452 __device_free_unused(struct device *dev)
454 if (!safe_list_empty(&dev->users) ||
455 !safe_list_empty(&dev->aliases) ||
456 dev->current_config || __devlock)
462 void device_remove_user(struct device_user *dep)
464 struct device *dev = dep->dev;
469 dep->hotplug = false;
473 safe_list_del(&dep->list);
475 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
476 __device_free_unused(dev);
480 device_free_unused(struct device *dev)
485 return __device_free_unused(dev);
487 avl_for_each_element_safe(&devices, dev, avl, tmp)
488 __device_free_unused(dev);
492 device_init_pending(void)
494 struct device *dev, *tmp;
496 avl_for_each_element_safe(&devices, dev, avl, tmp) {
497 if (!dev->config_pending)
500 dev->type->config_init(dev);
501 dev->config_pending = false;
505 static enum dev_change_type
506 device_reload_config(struct device *dev, struct blob_attr *attr)
508 struct blob_attr *tb[__DEV_ATTR_MAX];
509 const struct uci_blob_param_list *cfg = dev->type->config_params;
511 if (uci_blob_check_equal(dev->config, attr, cfg))
512 return DEV_CONFIG_NO_CHANGE;
514 if (cfg == &device_attr_list) {
515 memset(tb, 0, sizeof(tb));
518 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
519 blob_data(attr), blob_len(attr));
521 device_init_settings(dev, tb);
522 return DEV_CONFIG_RESTART;
524 return DEV_CONFIG_RECREATE;
528 device_set_config(struct device *dev, const struct device_type *type,
529 struct blob_attr *attr)
531 if (type != dev->type)
532 return DEV_CONFIG_RECREATE;
534 if (dev->type->reload)
535 return dev->type->reload(dev, attr);
537 return device_reload_config(dev, attr);
541 device_replace(struct device *dev, struct device *odev)
543 struct device_user *dep, *tmp;
544 bool present = odev->present;
547 device_set_present(odev, false);
549 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
551 safe_list_del(&dep->list);
552 safe_list_add(&dep->list, &dev->users);
558 device_set_present(dev, true);
562 device_reset_config(void)
566 avl_for_each_element(&devices, dev, avl)
567 dev->current_config = false;
571 device_reset_old(void)
573 struct device *dev, *tmp, *ndev;
575 avl_for_each_element_safe(&devices, dev, avl, tmp) {
576 if (dev->current_config || dev->default_config)
579 if (dev->type != &simple_device_type)
582 ndev = device_create_default(dev->ifname, dev->external);
583 device_replace(ndev, dev);
588 device_create(const char *name, const struct device_type *type,
589 struct blob_attr *config)
591 struct device *odev = NULL, *dev;
592 enum dev_change_type change;
594 config = blob_memdup(config);
598 odev = device_get(name, false);
600 odev->current_config = true;
601 change = device_set_config(odev, type, config);
602 if (odev->external) {
603 system_if_apply_settings(odev, &odev->settings);
604 change = DEV_CONFIG_APPLIED;
607 case DEV_CONFIG_RESTART:
608 case DEV_CONFIG_APPLIED:
609 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
611 odev->config = config;
612 if (change == DEV_CONFIG_RESTART && odev->present) {
613 device_set_present(odev, false);
614 device_set_present(odev, true);
617 case DEV_CONFIG_NO_CHANGE:
618 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
621 case DEV_CONFIG_RECREATE:
622 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
627 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
629 dev = type->create(name, config);
633 dev->current_config = true;
634 dev->config = config;
636 device_replace(dev, odev);
638 if (!config_init && dev->config_pending)
639 type->config_init(dev);
645 device_dump_status(struct blob_buf *b, struct device *dev)
647 struct device_settings st;
651 avl_for_each_element(&devices, dev, avl) {
654 c = blobmsg_open_table(b, dev->ifname);
655 device_dump_status(b, dev);
656 blobmsg_close_table(b, c);
662 blobmsg_add_u8(b, "external", dev->external);
663 blobmsg_add_u8(b, "present", dev->present);
664 blobmsg_add_string(b, "type", dev->type->name);
669 blobmsg_add_u8(b, "up", !!dev->active);
670 if (dev->type->dump_info)
671 dev->type->dump_info(dev, b);
673 system_if_dump_info(dev, b);
676 device_merge_settings(dev, &st);
677 if (st.flags & DEV_OPT_MTU)
678 blobmsg_add_u32(b, "mtu", st.mtu);
679 if (st.flags & DEV_OPT_MACADDR)
680 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
681 if (st.flags & DEV_OPT_TXQUEUELEN)
682 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
685 s = blobmsg_open_table(b, "statistics");
686 if (dev->type->dump_stats)
687 dev->type->dump_stats(dev, b);
689 system_if_dump_stats(dev, b);
690 blobmsg_close_table(b, s);