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);
183 void device_broadcast_event(struct device *dev, enum device_event ev)
185 struct device_user *dep, *tmp;
187 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
195 int device_claim(struct device_user *dep)
197 struct device *dev = dep->dev;
204 D(DEVICE, "Claim %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active + 1);
205 if (++dev->active != 1)
208 device_broadcast_event(dev, DEV_EVENT_SETUP);
209 ret = dev->set_state(dev, true);
211 device_broadcast_event(dev, DEV_EVENT_UP);
213 D(DEVICE, "claim device %s failed: %d\n", dev->ifname, ret);
215 dep->claimed = false;
221 void device_release(struct device_user *dep)
223 struct device *dev = dep->dev;
228 dep->claimed = false;
230 D(DEVICE, "Release %s %s, new refcount: %d\n", dev->type->name, dev->ifname, dev->active);
231 assert(dev->active >= 0);
236 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
238 dev->set_state(dev, false);
239 device_broadcast_event(dev, DEV_EVENT_DOWN);
242 int device_check_state(struct device *dev)
244 if (!dev->type->check_state)
247 return dev->type->check_state(dev);
250 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
256 strncpy(dev->ifname, name, IFNAMSIZ);
258 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
259 INIT_LIST_HEAD(&dev->users);
263 dev->set_state = set_device_state;
266 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
270 device_init_virtual(dev, type, ifname);
272 dev->avl.key = dev->ifname;
274 ret = avl_insert(&devices, &dev->avl);
278 system_if_clear_state(dev);
279 device_check_state(dev);
284 static struct device *
285 device_create_default(const char *name, bool external)
289 if (!external && system_if_force_external(name))
292 D(DEVICE, "Create simple device '%s'\n", name);
293 dev = calloc(1, sizeof(*dev));
294 dev->external = external;
295 dev->set_state = simple_device_set_state;
296 device_init(dev, &simple_device_type, name);
297 dev->default_config = true;
302 device_get(const char *name, int create)
306 if (strchr(name, '.'))
307 return get_vlan_device_chain(name, create);
310 return device_alias_get(name + 1);
312 dev = avl_find_element(&devices, name, dev, avl);
319 return device_create_default(name, create > 1);
323 device_delete(struct device *dev)
328 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
329 avl_delete(&devices, &dev->avl);
333 void device_cleanup(struct device *dev)
335 struct device_user *dep, *tmp;
337 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
338 list_for_each_entry_safe(dep, tmp, &dev->users, list) {
342 dep->cb(dep, DEV_EVENT_REMOVE);
349 static void __device_set_present(struct device *dev, bool state)
351 if (dev->present == state)
354 dev->present = state;
355 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
359 device_refresh_present(struct device *dev)
361 bool state = dev->sys_present;
363 if (dev->disabled || dev->deferred)
366 __device_set_present(dev, state);
369 void device_set_present(struct device *dev, bool state)
371 if (dev->sys_present == state)
374 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
375 dev->sys_present = state;
376 device_refresh_present(dev);
379 void device_add_user(struct device_user *dep, struct device *dev)
382 device_remove_user(dep);
388 list_add_tail(&dep->list, &dev->users);
389 if (dep->cb && dev->present) {
390 dep->cb(dep, DEV_EVENT_ADD);
392 dep->cb(dep, DEV_EVENT_UP);
397 device_free(struct device *dev)
402 dev->type->free(dev);
407 __device_free_unused(struct device *dev)
409 if (!list_empty(&dev->users) || dev->current_config || __devlock)
415 void device_remove_user(struct device_user *dep)
417 struct device *dev = dep->dev;
422 dep->hotplug = false;
426 list_del(&dep->list);
428 __device_free_unused(dev);
432 device_free_unused(struct device *dev)
437 return __device_free_unused(dev);
439 avl_for_each_element_safe(&devices, dev, avl, tmp)
440 __device_free_unused(dev);
444 device_init_pending(void)
446 struct device *dev, *tmp;
448 avl_for_each_element_safe(&devices, dev, avl, tmp) {
449 if (!dev->config_pending)
452 dev->type->config_init(dev);
453 dev->config_pending = false;
457 static enum dev_change_type
458 device_reload_config(struct device *dev, struct blob_attr *attr)
460 struct blob_attr *tb[__DEV_ATTR_MAX];
461 const struct config_param_list *cfg = dev->type->config_params;
463 if (config_check_equal(dev->config, attr, cfg))
464 return DEV_CONFIG_NO_CHANGE;
466 if (cfg == &device_attr_list) {
467 memset(tb, 0, sizeof(tb));
470 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
471 blob_data(attr), blob_len(attr));
473 device_init_settings(dev, tb);
474 return DEV_CONFIG_RESTART;
476 return DEV_CONFIG_RECREATE;
480 device_set_config(struct device *dev, const struct device_type *type,
481 struct blob_attr *attr)
483 if (type != dev->type)
484 return DEV_CONFIG_RECREATE;
486 if (dev->type->reload)
487 return dev->type->reload(dev, attr);
489 return device_reload_config(dev, attr);
493 device_replace(struct device *dev, struct device *odev)
495 struct device_user *dep, *tmp;
496 bool present = odev->present;
499 device_set_present(odev, false);
501 list_for_each_entry_safe(dep, tmp, &odev->users, list) {
503 list_move_tail(&dep->list, &dev->users);
509 device_set_present(dev, true);
513 device_reset_config(void)
517 avl_for_each_element(&devices, dev, avl)
518 dev->current_config = false;
522 device_reset_old(void)
524 struct device *dev, *tmp, *ndev;
526 avl_for_each_element_safe(&devices, dev, avl, tmp) {
527 if (dev->current_config || dev->default_config)
530 if (dev->type != &simple_device_type)
533 ndev = device_create_default(dev->ifname, dev->external);
534 device_replace(ndev, dev);
539 device_create(const char *name, const struct device_type *type,
540 struct blob_attr *config)
542 struct device *odev = NULL, *dev;
543 enum dev_change_type change;
545 config = config_memdup(config);
549 odev = device_get(name, false);
551 odev->current_config = true;
552 change = device_set_config(odev, type, config);
554 case DEV_CONFIG_RESTART:
555 case DEV_CONFIG_APPLIED:
556 D(DEVICE, "Device '%s': config applied\n", odev->ifname);
558 odev->config = config;
559 if (change == DEV_CONFIG_RESTART && odev->present) {
560 device_set_present(odev, false);
561 device_set_present(odev, true);
564 case DEV_CONFIG_NO_CHANGE:
565 D(DEVICE, "Device '%s': no configuration change\n", odev->ifname);
568 case DEV_CONFIG_RECREATE:
569 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
574 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
576 dev = type->create(name, config);
580 dev->current_config = true;
581 dev->config = config;
583 device_replace(dev, odev);
585 if (!config_init && dev->config_pending)
586 type->config_init(dev);
592 device_dump_status(struct blob_buf *b, struct device *dev)
594 struct device_settings st;
598 avl_for_each_element(&devices, dev, avl) {
601 c = blobmsg_open_table(b, dev->ifname);
602 device_dump_status(b, dev);
603 blobmsg_close_table(b, c);
609 blobmsg_add_u8(b, "external", dev->external);
610 blobmsg_add_u8(b, "present", dev->present);
611 blobmsg_add_string(b, "type", dev->type->name);
616 blobmsg_add_u8(b, "up", !!dev->active);
617 if (dev->type->dump_info)
618 dev->type->dump_info(dev, b);
620 system_if_dump_info(dev, b);
623 device_merge_settings(dev, &st);
624 if (st.flags & DEV_OPT_MTU)
625 blobmsg_add_u32(b, "mtu", st.mtu);
626 if (st.flags & DEV_OPT_MACADDR)
627 blobmsg_add_string(b, "macaddr", ether_ntoa((struct ether_addr *) st.macaddr));
628 if (st.flags & DEV_OPT_TXQUEUELEN)
629 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
632 s = blobmsg_open_table(b, "statistics");
633 if (dev->type->dump_stats)
634 dev->type->dump_stats(dev, b);
636 system_if_dump_stats(dev, b);
637 blobmsg_close_table(b, s);