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
[] = {
34 [IFEV_DOWN
] = "ifdown",
36 [IFEV_UP_FAILED
] = "ifup-failed",
37 [IFEV_UPDATE
] = "ifupdate",
39 [IFEV_RELOAD
] = "reload",
40 [IFEV_LINK_UP
] = "iflink",
44 run_cmd(const char *ifname
, const char *device
, enum interface_event event
,
45 enum interface_update_flags updated
)
52 return task_complete(NULL
, -1);
56 uloop_process_add(&task
);
60 setenv("ACTION", eventnames
[event
], 1);
61 setenv("INTERFACE", ifname
, 1);
63 setenv("DEVICE", device
, 1);
65 if (event
== IFEV_UPDATE
) {
66 if (updated
& IUF_ADDRESS
)
67 setenv("IFUPDATE_ADDRESSES", "1", 1);
68 if (updated
& IUF_ROUTE
)
69 setenv("IFUPDATE_ROUTES", "1", 1);
70 if (updated
& IUF_PREFIX
)
71 setenv("IFUPDATE_PREFIXES", "1", 1);
72 if (updated
& IUF_DATA
)
73 setenv("IFUPDATE_DATA", "1", 1);
76 argv
[0] = hotplug_cmd_path
;
79 execvp(argv
[0], argv
);
86 const char *device
= NULL
;
87 if (list_empty(&pending
))
90 current
= list_first_entry(&pending
, struct interface
, hotplug_list
);
91 current_ev
= current
->hotplug_ev
;
92 list_del_init(¤t
->hotplug_list
);
94 if ((current_ev
== IFEV_UP
|| current_ev
== IFEV_UPDATE
) && current
->l3_dev
.dev
)
95 device
= current
->l3_dev
.dev
->ifname
;
97 D(SYSTEM
, "Call hotplug handler for interface '%s', event '%s' (%s)\n",
98 current
->name
, eventnames
[current_ev
], device
? device
: "none");
99 run_cmd(current
->name
, device
, current_ev
, current
->updated
);
103 task_complete(struct uloop_process
*proc
, int ret
)
106 D(SYSTEM
, "Complete hotplug handler for interface '%s'\n", current
->name
);
112 * Queue an interface for an up/down event.
113 * An interface can only have one event in the queue and one
114 * event waiting for completion.
115 * When queueing an event that is the same as the one waiting for
116 * completion, remove the interface from the queue
119 interface_queue_event(struct interface
*iface
, enum interface_event ev
)
121 D(SYSTEM
, "Queue hotplug handler for interface '%s', event '%s'\n",
122 iface
->name
, eventnames
[ev
]);
123 if (ev
== IFEV_UP
|| ev
== IFEV_DOWN
)
124 netifd_ubus_interface_event(iface
, ev
== IFEV_UP
);
126 netifd_ubus_interface_notify(iface
, ev
!= IFEV_DOWN
);
128 /* no hotplug.d calls for link up */
129 if (ev
== IFEV_LINK_UP
)
132 if (current
== iface
) {
133 /* an event for iface is being processed */
134 if (!list_empty(&iface
->hotplug_list
)) {
135 /* an additional event for iface is pending */
136 /* overwrite pending event if it differs from */
138 if (ev
!= IFEV_UPDATE
)
139 iface
->hotplug_ev
= ev
;
142 /* no additional event for iface is pending */
143 if (ev
!= current_ev
|| ev
== IFEV_UPDATE
) {
144 /* only add the interface to the pending list if
145 * the event is different from the one being
146 * handled or if it is an update */
147 iface
->hotplug_ev
= ev
;
148 /* Handle hotplug calls FIFO */
149 list_add_tail(&iface
->hotplug_list
, &pending
);
154 /* currently not handling an event or handling an event
155 * for another interface */
156 if (!list_empty(&iface
->hotplug_list
)) {
157 /* an event for iface is pending */
158 if (!(iface
->hotplug_ev
== IFEV_UP
&&
159 ev
== IFEV_UPDATE
)) {
160 /* overwrite pending event, unless the incoming
161 * event is an ifupdate while the pending one
163 iface
->hotplug_ev
= ev
;
167 /* an event for the interface is not yet pending,
169 iface
->hotplug_ev
= ev
;
170 /* Handle hotplug calls FIFO */
171 list_add_tail(&iface
->hotplug_list
, &pending
);
175 if (!task
.pending
&& !current
)
180 interface_dequeue_event(struct interface
*iface
)
182 if (iface
== current
)
185 if (!list_empty(&iface
->hotplug_list
))
186 list_del_init(&iface
->hotplug_list
);
189 static void interface_event_cb(struct interface_user
*dep
, struct interface
*iface
,
190 enum interface_event ev
)
198 interface_queue_event(iface
, ev
);
201 interface_dequeue_event(iface
);
208 static struct interface_user event_user
= {
209 .cb
= interface_event_cb
212 static void __init
interface_event_init(void)
214 interface_add_user(&event_user
, NULL
);