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_remove_user(&alias
->new_dep
);
41 if (alias
->dev
.active
) {
43 device_add_user(&alias
->new_dep
, dev
);
49 alias
->update
= false;
50 device_remove_user(&alias
->dep
);
51 alias
->dev
.hidden
= !dev
;
53 strcpy(alias
->dev
.ifname
, dev
->ifname
);
54 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
55 device_add_user(&alias
->dep
, dev
);
57 alias
->dev
.ifname
[0] = 0;
58 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
63 alias_device_set_state(struct device
*dev
, bool state
)
65 struct alias_device
*alias
;
67 alias
= container_of(dev
, struct alias_device
, dev
);
72 return device_claim(&alias
->dep
);
74 device_release(&alias
->dep
);
76 alias_set_device(alias
, alias
->new_dep
.dev
);
81 static void alias_device_cb(struct device_user
*dep
, enum device_event ev
)
83 struct alias_device
*alias
;
86 alias
= container_of(dep
, struct alias_device
, dep
);
90 case DEV_EVENT_REMOVE
:
91 device_set_present(&alias
->dev
, present
);
94 device_broadcast_event(&alias
->dev
, ev
);
99 static struct device
*
100 alias_device_create(const char *name
, struct blob_attr
*attr
)
102 struct alias_device
*alias
;
104 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
105 strcpy(alias
->name
, name
);
106 alias
->dev
.set_state
= alias_device_set_state
;
107 alias
->dev
.hidden
= true;
108 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
109 alias
->avl
.key
= alias
->name
;
110 avl_insert(&aliases
, &alias
->avl
);
111 alias
->dep
.alias
= true;
112 alias
->dep
.cb
= alias_device_cb
;
113 device_check_state(&alias
->dev
);
118 static void alias_device_free(struct device
*dev
)
120 struct alias_device
*alias
;
122 alias
= container_of(dev
, struct alias_device
, dev
);
123 avl_delete(&aliases
, &alias
->avl
);
127 static int alias_check_state(struct device
*dev
)
129 struct alias_device
*alias
;
130 struct interface
*iface
;
131 struct device
*ndev
= NULL
;
133 alias
= container_of(dev
, struct alias_device
, dev
);
135 iface
= vlist_find(&interfaces
, alias
->name
, iface
, node
);
136 if (iface
&& iface
->state
== IFS_UP
)
137 ndev
= iface
->l3_dev
.dev
;
139 alias_set_device(alias
, ndev
);
144 static const struct device_type alias_device_type
= {
145 .name
= "Network alias",
146 .create
= alias_device_create
,
147 .free
= alias_device_free
,
148 .check_state
= alias_check_state
,
152 alias_notify_device(const char *name
, struct device
*dev
)
154 struct alias_device
*alias
;
158 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
160 alias_set_device(alias
, dev
);
166 device_alias_get(const char *name
)
168 struct alias_device
*alias
;
170 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
174 return alias_device_create(name
, NULL
);
177 static void __init
alias_init(void)
179 avl_init(&aliases
, avl_strcmp
, false, NULL
);