2 * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/ioctl.h>
27 #include <sys/socket.h>
29 #include <linux/sockios.h>
33 struct udev_event *udev_event_new(struct udev_device *dev)
35 struct udev_event *event;
37 event = malloc(sizeof(struct udev_event));
40 memset(event, 0x00, sizeof(struct udev_event));
43 event->udev = udev_device_get_udev(dev);
44 udev_list_init(&event->run_list);
46 util_strlcpy(event->owner, "0", sizeof(event->owner));
47 util_strlcpy(event->group, "0", sizeof(event->group));
49 dbg(event->udev, "allocated event %p\n", event);
53 void udev_event_unref(struct udev_event *event)
55 udev_list_cleanup(event->udev, &event->run_list);
56 dbg(event->udev, "free event %p\n", event);
60 static void kernel_log(struct ifreq ifr)
65 klog = open("/dev/kmsg", O_WRONLY);
69 f = fdopen(klog, "w");
75 fprintf(f, "<6>udev: renamed network interface %s to %s\n",
76 ifr.ifr_name, ifr.ifr_newname);
80 static int rename_netif(struct udev_event *event)
82 struct udev_device *dev = event->dev;
87 info(event->udev, "changing net interface name from '%s' to '%s'\n",
88 udev_device_get_sysname(dev), event->name);
92 sk = socket(PF_INET, SOCK_DGRAM, 0);
94 err(event->udev, "error opening socket: %m\n");
98 memset(&ifr, 0x00, sizeof(struct ifreq));
99 util_strlcpy(ifr.ifr_name, udev_device_get_sysname(dev), IFNAMSIZ);
100 util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
101 err = ioctl(sk, SIOCSIFNAME, &ifr);
107 /* see if the destination interface name already exists */
108 if (errno != EEXIST) {
109 err(event->udev, "error changing netif name %s to %s: %m\n",
110 ifr.ifr_name, ifr.ifr_newname);
114 /* free our own name, another process may wait for us */
115 util_strlcpy(ifr.ifr_newname, udev_device_get_sysname(dev), IFNAMSIZ);
116 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
117 err = ioctl(sk, SIOCSIFNAME, &ifr);
119 err(event->udev, "error changing netif name %s to %s: %m\n",
120 ifr.ifr_name, ifr.ifr_newname);
124 /* wait 30 seconds for our target to become available */
125 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
126 util_strlcpy(ifr.ifr_newname, udev_device_get_devnode(dev), IFNAMSIZ);
129 err = ioctl(sk, SIOCSIFNAME, &ifr);
135 if (errno != EEXIST) {
136 err(event->udev, "error changing net interface name %s to %s: %m\n",
137 ifr.ifr_name, ifr.ifr_newname);
140 dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
141 udev_device_get_devnode(dev), (30 * 20) - loop);
142 usleep(1000 * 1000 / 20);
151 int udev_event_run(struct udev_event *event, struct udev_rules *rules)
153 struct udev_device *dev = event->dev;
156 if (udev_device_get_devpath_old(dev) != NULL) {
157 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
158 info(event->udev, "moved database from '%s' to '%s'\n",
159 udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
162 /* add device node */
163 if (major(udev_device_get_devnum(dev)) != 0 &&
164 (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
165 char filename[UTIL_PATH_SIZE];
166 struct udev_device *dev_old;
168 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
170 udev_rules_get_name(rules, event);
171 if (event->ignore_device) {
172 info(event->udev, "device event will be ignored\n");
176 if (event->name[0] == '\0') {
177 info(event->udev, "device node creation supressed\n");
181 /* set device node name */
182 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
183 util_strlcat(filename, "/", sizeof(filename));
184 util_strlcat(filename, event->name, sizeof(filename));
185 udev_device_set_devnode(dev, filename);
187 /* read current database entry; cleanup, if it is known device */
188 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
189 if (dev_old != NULL) {
190 info(event->udev, "device '%s' already in database, updating\n",
191 udev_device_get_devpath(dev));
192 udev_node_update_old_links(dev, dev_old, event->test);
193 udev_device_unref(dev_old);
196 udev_device_update_db(dev);
198 err = udev_node_add(dev, event->mode, event->owner, event->group, event->test);
206 if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
207 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
209 udev_rules_get_name(rules, event);
210 if (event->ignore_device) {
211 info(event->udev, "device event will be ignored\n");
214 if (event->name[0] == '\0') {
215 info(event->udev, "device renaming supressed\n");
219 /* look if we want to change the name of the netif */
220 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
221 char syspath[UTIL_PATH_SIZE];
224 err = rename_netif(event);
227 info(event->udev, "renamed netif to '%s'\n", event->name);
229 /* remember old name */
230 udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
232 /* now change the devpath, because the kernel device name has changed */
233 util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
234 pos = strrchr(syspath, '/');
237 util_strlcat(syspath, event->name, sizeof(syspath));
238 udev_device_set_syspath(event->dev, syspath);
239 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
240 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
246 /* remove device node */
247 if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
248 /* import database entry and delete it */
249 udev_device_read_db(dev);
251 udev_device_delete_db(dev);
253 if (udev_device_get_devnode(dev) == NULL) {
254 char devnode[UTIL_PATH_SIZE];
256 info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
257 udev_device_get_syspath(dev), udev_device_get_sysname(dev));
258 util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
259 util_strlcat(devnode, "/", sizeof(devnode));
260 util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
261 udev_device_set_devnode(dev, devnode);
264 udev_rules_get_run(rules, event);
265 if (event->ignore_device) {
266 info(event->udev, "device event will be ignored\n");
270 if (udev_device_get_ignore_remove(dev)) {
271 info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
275 err = udev_node_remove(dev, event->test);
279 /* default devices */
280 udev_rules_get_run(rules, event);
281 if (event->ignore_device)
282 info(event->udev, "device event will be ignored\n");