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",
41 [IFEV_CREATE] = "create",
45 run_cmd(const char *ifname, const char *device, enum interface_event event,
46 enum interface_update_flags updated)
53 return task_complete(NULL, -1);
57 uloop_process_add(&task);
61 setenv("ACTION", eventnames[event], 1);
62 setenv("INTERFACE", ifname, 1);
64 setenv("DEVICE", device, 1);
66 if (event == IFEV_UPDATE) {
67 if (updated & IUF_ADDRESS)
68 setenv("IFUPDATE_ADDRESSES", "1", 1);
69 if (updated & IUF_ROUTE)
70 setenv("IFUPDATE_ROUTES", "1", 1);
71 if (updated & IUF_PREFIX)
72 setenv("IFUPDATE_PREFIXES", "1", 1);
73 if (updated & IUF_DATA)
74 setenv("IFUPDATE_DATA", "1", 1);
77 argv[0] = hotplug_cmd_path;
80 execvp(argv[0], argv);
87 const char *device = NULL;
88 if (list_empty(&pending))
91 current = list_first_entry(&pending, struct interface, hotplug_list);
92 current_ev = current->hotplug_ev;
93 list_del_init(¤t->hotplug_list);
95 if ((current_ev == IFEV_UP || current_ev == IFEV_UPDATE) && current->l3_dev.dev)
96 device = current->l3_dev.dev->ifname;
98 D(SYSTEM, "Call hotplug handler for interface '%s', event '%s' (%s)\n",
99 current->name, eventnames[current_ev], device ? device : "none");
100 run_cmd(current->name, device, current_ev, current->updated);
104 task_complete(struct uloop_process *proc, int ret)
107 D(SYSTEM, "Complete hotplug handler for interface '%s'\n", current->name);
113 * Queue an interface for an up/down event.
114 * An interface can only have one event in the queue and one
115 * event waiting for completion.
116 * When queueing an event that is the same as the one waiting for
117 * completion, remove the interface from the queue
120 interface_queue_event(struct interface *iface, enum interface_event ev)
122 D(SYSTEM, "Queue hotplug handler for interface '%s', event '%s'\n",
123 iface->name, eventnames[ev]);
124 if (ev == IFEV_UP || ev == IFEV_DOWN)
125 netifd_ubus_interface_event(iface, ev == IFEV_UP);
127 netifd_ubus_interface_notify(iface, ev != IFEV_DOWN);
129 /* no hotplug.d calls for link up */
130 if (ev == IFEV_LINK_UP)
133 if (current == iface) {
134 /* an event for iface is being processed */
135 if (!list_empty(&iface->hotplug_list)) {
136 /* an additional event for iface is pending */
137 /* overwrite pending event if it differs from */
139 if (ev != IFEV_UPDATE)
140 iface->hotplug_ev = ev;
143 /* no additional event for iface is pending */
144 if (ev != current_ev || ev == IFEV_UPDATE) {
145 /* only add the interface to the pending list if
146 * the event is different from the one being
147 * handled or if it is an update */
148 iface->hotplug_ev = ev;
149 /* Handle hotplug calls FIFO */
150 list_add_tail(&iface->hotplug_list, &pending);
155 /* currently not handling an event or handling an event
156 * for another interface */
157 if (!list_empty(&iface->hotplug_list)) {
158 /* an event for iface is pending */
159 if (!(iface->hotplug_ev == IFEV_UP &&
160 ev == IFEV_UPDATE)) {
161 /* overwrite pending event, unless the incoming
162 * event is an ifupdate while the pending one
164 iface->hotplug_ev = ev;
168 /* an event for the interface is not yet pending,
170 iface->hotplug_ev = ev;
171 /* Handle hotplug calls FIFO */
172 list_add_tail(&iface->hotplug_list, &pending);
176 if (!task.pending && !current)
181 interface_dequeue_event(struct interface *iface)
183 if (iface == current)
186 if (!list_empty(&iface->hotplug_list))
187 list_del_init(&iface->hotplug_list);
190 static void interface_event_cb(struct interface_user *dep, struct interface *iface,
191 enum interface_event ev)
199 interface_queue_event(iface, ev);
202 interface_dequeue_event(iface);
209 static struct interface_user event_user = {
210 .cb = interface_event_cb
213 static void __init interface_event_init(void)
215 interface_add_user(&event_user, NULL);