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);