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.
18 #include <libubox/uloop.h>
21 #include "interface.h"
24 char *hotplug_cmd_path
= DEFAULT_HOTPLUG_PATH
;
25 static struct interface
*current
;
26 static enum interface_event current_ev
;
27 static struct list_head pending
= LIST_HEAD_INIT(pending
);
29 static void task_complete(struct uloop_process
*proc
, int ret
);
30 static struct uloop_process task
= {
33 static const char * const eventnames
[] = {"ifdown", "ifup", "ifupdate"};
36 run_cmd(const char *ifname
, const char *device
, enum interface_event event
,
37 enum interface_update_flags updated
)
44 return task_complete(NULL
, -1);
48 uloop_process_add(&task
);
52 setenv("ACTION", eventnames
[event
], 1);
53 setenv("INTERFACE", ifname
, 1);
55 setenv("DEVICE", device
, 1);
57 if (event
== IFEV_UPDATE
) {
58 if (updated
& IUF_ADDRESS
)
59 setenv("IFUPDATE_ADDRESSES", "1", 1);
60 if (updated
& IUF_ROUTE
)
61 setenv("IFUPDATE_ROUTES", "1", 1);
62 if (updated
& IUF_PREFIX
)
63 setenv("IFUPDATE_PREFIXES", "1", 1);
64 if (updated
& IUF_DATA
)
65 setenv("IFUPDATE_DATA", "1", 1);
68 argv
[0] = hotplug_cmd_path
;
71 execvp(argv
[0], argv
);
78 const char *device
= NULL
;
79 if (list_empty(&pending
))
82 current
= list_first_entry(&pending
, struct interface
, hotplug_list
);
83 current_ev
= current
->hotplug_ev
;
84 list_del_init(¤t
->hotplug_list
);
86 if ((current_ev
== IFEV_UP
|| current_ev
== IFEV_UPDATE
) && current
->l3_dev
.dev
)
87 device
= current
->l3_dev
.dev
->ifname
;
89 D(SYSTEM
, "Call hotplug handler for interface '%s', event '%s' (%s)\n",
90 current
->name
, eventnames
[current_ev
], device
? device
: "none");
91 run_cmd(current
->name
, device
, current_ev
, current
->updated
);
95 task_complete(struct uloop_process
*proc
, int ret
)
98 D(SYSTEM
, "Complete hotplug handler for interface '%s'\n", current
->name
);
104 * Queue an interface for an up/down event.
105 * An interface can only have one event in the queue and one
106 * event waiting for completion.
107 * When queueing an event that is the same as the one waiting for
108 * completion, remove the interface from the queue
111 interface_queue_event(struct interface
*iface
, enum interface_event ev
)
113 D(SYSTEM
, "Queue hotplug handler for interface '%s', event '%s'\n",
114 iface
->name
, eventnames
[ev
]);
115 if (ev
== IFEV_UP
|| ev
== IFEV_DOWN
)
116 netifd_ubus_interface_event(iface
, ev
== IFEV_UP
);
118 netifd_ubus_interface_notify(iface
, ev
!= IFEV_DOWN
);
120 if (current
== iface
) {
121 /* an event for iface is being processed */
122 if (!list_empty(&iface
->hotplug_list
)) {
123 /* an additional event for iface is pending */
124 /* overwrite pending event if it differs from */
126 if (ev
!= IFEV_UPDATE
)
127 iface
->hotplug_ev
= ev
;
130 /* no additional event for iface is pending */
131 if (ev
!= current_ev
|| ev
== IFEV_UPDATE
) {
132 /* only add the interface to the pending list if
133 * the event is different from the one being
134 * handled or if it is an update */
135 iface
->hotplug_ev
= ev
;
136 /* Handle hotplug calls FIFO */
137 list_add_tail(&iface
->hotplug_list
, &pending
);
142 /* currently not handling an event or handling an event
143 * for another interface */
144 if (!list_empty(&iface
->hotplug_list
)) {
145 /* an event for iface is pending */
146 if (!(iface
->hotplug_ev
== IFEV_UP
&&
147 ev
== IFEV_UPDATE
)) {
148 /* overwrite pending event, unless the incoming
149 * event is an ifupdate while the pending one
151 iface
->hotplug_ev
= ev
;
155 /* an event for the interface is not yet pending,
157 iface
->hotplug_ev
= ev
;
158 /* Handle hotplug calls FIFO */
159 list_add_tail(&iface
->hotplug_list
, &pending
);
163 if (!task
.pending
&& !current
)
168 interface_dequeue_event(struct interface
*iface
)
170 if (iface
== current
)
173 if (!list_empty(&iface
->hotplug_list
))
174 list_del_init(&iface
->hotplug_list
);
177 static void interface_event_cb(struct interface_user
*dep
, struct interface
*iface
,
178 enum interface_event ev
)
184 interface_queue_event(iface
, ev
);
188 interface_dequeue_event(iface
);
193 static struct interface_user event_user
= {
194 .cb
= interface_event_cb
197 static void __init
interface_event_init(void)
199 interface_add_user(&event_user
, NULL
);