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_UPDATE] = "ifupdate",
38 [IFEV_RELOAD] = "reload",
39 [IFEV_LINK_UP] = "iflink",
43 run_cmd(const char *ifname, const char *device, enum interface_event event,
44 enum interface_update_flags updated)
51 return task_complete(NULL, -1);
55 uloop_process_add(&task);
59 setenv("ACTION", eventnames[event], 1);
60 setenv("INTERFACE", ifname, 1);
62 setenv("DEVICE", device, 1);
64 if (event == IFEV_UPDATE) {
65 if (updated & IUF_ADDRESS)
66 setenv("IFUPDATE_ADDRESSES", "1", 1);
67 if (updated & IUF_ROUTE)
68 setenv("IFUPDATE_ROUTES", "1", 1);
69 if (updated & IUF_PREFIX)
70 setenv("IFUPDATE_PREFIXES", "1", 1);
71 if (updated & IUF_DATA)
72 setenv("IFUPDATE_DATA", "1", 1);
75 argv[0] = hotplug_cmd_path;
78 execvp(argv[0], argv);
85 const char *device = NULL;
86 if (list_empty(&pending))
89 current = list_first_entry(&pending, struct interface, hotplug_list);
90 current_ev = current->hotplug_ev;
91 list_del_init(¤t->hotplug_list);
93 if ((current_ev == IFEV_UP || current_ev == IFEV_UPDATE) && current->l3_dev.dev)
94 device = current->l3_dev.dev->ifname;
96 D(SYSTEM, "Call hotplug handler for interface '%s', event '%s' (%s)\n",
97 current->name, eventnames[current_ev], device ? device : "none");
98 run_cmd(current->name, device, current_ev, current->updated);
102 task_complete(struct uloop_process *proc, int ret)
105 D(SYSTEM, "Complete hotplug handler for interface '%s'\n", current->name);
111 * Queue an interface for an up/down event.
112 * An interface can only have one event in the queue and one
113 * event waiting for completion.
114 * When queueing an event that is the same as the one waiting for
115 * completion, remove the interface from the queue
118 interface_queue_event(struct interface *iface, enum interface_event ev)
120 D(SYSTEM, "Queue hotplug handler for interface '%s', event '%s'\n",
121 iface->name, eventnames[ev]);
122 if (ev == IFEV_UP || ev == IFEV_DOWN)
123 netifd_ubus_interface_event(iface, ev == IFEV_UP);
125 netifd_ubus_interface_notify(iface, ev != IFEV_DOWN);
127 /* no hotplug.d calls for link up */
128 if (ev == IFEV_LINK_UP)
131 if (current == iface) {
132 /* an event for iface is being processed */
133 if (!list_empty(&iface->hotplug_list)) {
134 /* an additional event for iface is pending */
135 /* overwrite pending event if it differs from */
137 if (ev != IFEV_UPDATE)
138 iface->hotplug_ev = ev;
141 /* no additional event for iface is pending */
142 if (ev != current_ev || ev == IFEV_UPDATE) {
143 /* only add the interface to the pending list if
144 * the event is different from the one being
145 * handled or if it is an update */
146 iface->hotplug_ev = ev;
147 /* Handle hotplug calls FIFO */
148 list_add_tail(&iface->hotplug_list, &pending);
153 /* currently not handling an event or handling an event
154 * for another interface */
155 if (!list_empty(&iface->hotplug_list)) {
156 /* an event for iface is pending */
157 if (!(iface->hotplug_ev == IFEV_UP &&
158 ev == IFEV_UPDATE)) {
159 /* overwrite pending event, unless the incoming
160 * event is an ifupdate while the pending one
162 iface->hotplug_ev = ev;
166 /* an event for the interface is not yet pending,
168 iface->hotplug_ev = ev;
169 /* Handle hotplug calls FIFO */
170 list_add_tail(&iface->hotplug_list, &pending);
174 if (!task.pending && !current)
179 interface_dequeue_event(struct interface *iface)
181 if (iface == current)
184 if (!list_empty(&iface->hotplug_list))
185 list_del_init(&iface->hotplug_list);
188 static void interface_event_cb(struct interface_user *dep, struct interface *iface,
189 enum interface_event ev)
196 interface_queue_event(iface, ev);
199 interface_dequeue_event(iface);
206 static struct interface_user event_user = {
207 .cb = interface_event_cb
210 static void __init interface_event_init(void)
212 interface_add_user(&event_user, NULL);