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.
20 #include "interface.h"
22 static struct avl_tree aliases;
27 struct device_user dep;
28 struct device_user new_dep;
33 static void alias_set_device(struct alias_device *alias, struct device *dev)
35 if (dev == alias->dep.dev) {
37 device_remove_user(&alias->new_dep);
38 alias->update = false;
40 device_set_present(&alias->dev, true);
45 device_set_present(&alias->dev, false);
46 device_remove_user(&alias->new_dep);
47 if (alias->dev.active) {
49 device_add_user(&alias->new_dep, dev);
55 alias->update = false;
56 device_remove_user(&alias->dep);
57 alias->dev.hidden = !dev;
59 device_set_ifindex(&alias->dev, dev->ifindex);
60 device_set_ifname(&alias->dev, dev->ifname);
61 device_add_user(&alias->dep, dev);
63 device_set_ifname(&alias->dev, "");
64 device_set_link(&alias->dev, false);
69 alias_device_set_state(struct device *dev, bool state)
71 struct alias_device *alias;
73 alias = container_of(dev, struct alias_device, dev);
78 return device_claim(&alias->dep);
80 device_release(&alias->dep);
82 alias_set_device(alias, alias->new_dep.dev);
87 static void alias_device_cb(struct device_user *dep, enum device_event ev)
89 struct alias_device *alias;
91 alias = container_of(dep, struct alias_device, dep);
94 device_set_present(&alias->dev, true);
96 case DEV_EVENT_REMOVE:
97 device_set_present(&alias->dev, false);
99 case DEV_EVENT_LINK_UP:
100 device_set_link(&alias->dev, true);
102 case DEV_EVENT_LINK_DOWN:
103 device_set_link(&alias->dev, false);
105 case DEV_EVENT_UPDATE_IFINDEX:
106 device_set_ifindex(&alias->dev, dep->dev->ifindex);
109 device_broadcast_event(&alias->dev, ev);
114 static struct device *
115 alias_device_create(const char *name, struct device_type *devtype,
116 struct blob_attr *attr)
118 struct alias_device *alias;
120 alias = calloc(1, sizeof(*alias) + strlen(name) + 1);
124 strcpy(alias->name, name);
125 alias->dev.set_state = alias_device_set_state;
126 alias->dev.hidden = true;
127 if (device_init_virtual(&alias->dev, devtype, NULL) < 0) {
132 alias->avl.key = alias->name;
133 avl_insert(&aliases, &alias->avl);
134 alias->dep.alias = true;
135 alias->dep.cb = alias_device_cb;
136 device_check_state(&alias->dev);
141 static void alias_device_free(struct device *dev)
143 struct alias_device *alias;
145 alias = container_of(dev, struct alias_device, dev);
146 device_remove_user(&alias->new_dep);
147 device_remove_user(&alias->dep);
148 avl_delete(&aliases, &alias->avl);
152 static int alias_check_state(struct device *dev)
154 struct alias_device *alias;
155 struct interface *iface;
156 struct device *ndev = NULL;
158 alias = container_of(dev, struct alias_device, dev);
160 iface = vlist_find(&interfaces, alias->name, iface, node);
161 if (iface && iface->state == IFS_UP)
162 ndev = iface->l3_dev.dev;
164 alias_set_device(alias, ndev);
169 static struct device_type alias_device_type = {
170 .name = "Network alias",
171 .create = alias_device_create,
172 .free = alias_device_free,
173 .check_state = alias_check_state,
177 alias_notify_device(const char *name, struct device *dev)
179 struct alias_device *alias;
183 alias = avl_find_element(&aliases, name, alias, avl);
185 alias_set_device(alias, dev);
191 device_alias_get(const char *name)
193 struct alias_device *alias;
195 alias = avl_find_element(&aliases, name, alias, avl);
199 return alias_device_create(name, &alias_device_type, NULL);
202 static void __init alias_init(void)
204 avl_init(&aliases, avl_strcmp, false, NULL);