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 const struct device_type alias_device_type
;
35 static void alias_set_device(struct alias_device
*alias
, struct device
*dev
)
37 if (dev
== alias
->dep
.dev
)
40 device_set_present(&alias
->dev
, false);
41 device_remove_user(&alias
->new_dep
);
42 if (alias
->dev
.active
) {
44 device_add_user(&alias
->new_dep
, dev
);
50 alias
->update
= false;
51 device_remove_user(&alias
->dep
);
52 alias
->dev
.hidden
= !dev
;
54 strcpy(alias
->dev
.ifname
, dev
->ifname
);
55 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
56 device_add_user(&alias
->dep
, dev
);
58 alias
->dev
.ifname
[0] = 0;
59 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
64 alias_device_set_state(struct device
*dev
, bool state
)
66 struct alias_device
*alias
;
68 alias
= container_of(dev
, struct alias_device
, dev
);
73 return device_claim(&alias
->dep
);
75 device_release(&alias
->dep
);
77 alias_set_device(alias
, alias
->new_dep
.dev
);
82 static void alias_device_cb(struct device_user
*dep
, enum device_event ev
)
84 struct alias_device
*alias
;
87 alias
= container_of(dep
, struct alias_device
, dep
);
91 case DEV_EVENT_REMOVE
:
92 device_set_present(&alias
->dev
, present
);
95 device_broadcast_event(&alias
->dev
, ev
);
100 static struct device
*
101 alias_device_create(const char *name
, struct blob_attr
*attr
)
103 struct alias_device
*alias
;
105 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
106 strcpy(alias
->name
, name
);
107 alias
->dev
.set_state
= alias_device_set_state
;
108 alias
->dev
.hidden
= true;
109 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
110 alias
->avl
.key
= alias
->name
;
111 avl_insert(&aliases
, &alias
->avl
);
112 alias
->dep
.alias
= true;
113 alias
->dep
.cb
= alias_device_cb
;
114 device_check_state(&alias
->dev
);
119 static void alias_device_free(struct device
*dev
)
121 struct alias_device
*alias
;
123 alias
= container_of(dev
, struct alias_device
, dev
);
124 avl_delete(&aliases
, &alias
->avl
);
128 static int alias_check_state(struct device
*dev
)
130 struct alias_device
*alias
;
131 struct interface
*iface
;
132 struct device
*ndev
= NULL
;
134 alias
= container_of(dev
, struct alias_device
, dev
);
136 iface
= vlist_find(&interfaces
, alias
->name
, iface
, node
);
137 if (iface
&& iface
->state
== IFS_UP
)
138 ndev
= iface
->l3_dev
.dev
;
140 alias_set_device(alias
, ndev
);
145 static const struct device_type alias_device_type
= {
146 .name
= "Network alias",
147 .create
= alias_device_create
,
148 .free
= alias_device_free
,
149 .check_state
= alias_check_state
,
153 alias_notify_device(const char *name
, struct device
*dev
)
155 struct alias_device
*alias
;
159 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
161 alias_set_device(alias
, dev
);
167 device_alias_get(const char *name
)
169 struct alias_device
*alias
;
171 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
175 return alias_device_create(name
, NULL
);
178 static void __init
alias_init(void)
180 avl_init(&aliases
, avl_strcmp
, false, NULL
);