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>
32 #include "udev_rules.h"
34 static void kernel_log(struct ifreq ifr)
39 klog = open("/dev/kmsg", O_WRONLY);
43 f = fdopen(klog, "w");
49 fprintf(f, "<6>udev: renamed network interface %s to %s\n",
50 ifr.ifr_name, ifr.ifr_newname);
54 static int rename_netif(struct udevice *udevice)
60 info(udevice->udev, "changing net interface name from '%s' to '%s'\n", udevice->dev->kernel, udevice->name);
61 if (udevice->test_run)
64 sk = socket(PF_INET, SOCK_DGRAM, 0);
66 err(udevice->udev, "error opening socket: %m\n");
70 memset(&ifr, 0x00, sizeof(struct ifreq));
71 util_strlcpy(ifr.ifr_name, udevice->dev->kernel, IFNAMSIZ);
72 util_strlcpy(ifr.ifr_newname, udevice->name, IFNAMSIZ);
73 retval = ioctl(sk, SIOCSIFNAME, &ifr);
79 /* see if the destination interface name already exists */
80 if (errno != EEXIST) {
81 err(udevice->udev, "error changing netif name %s to %s: %m\n",
82 ifr.ifr_name, ifr.ifr_newname);
86 /* free our own name, another process may wait for us */
87 util_strlcpy(ifr.ifr_newname, udevice->dev->kernel, IFNAMSIZ);
88 util_strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
89 retval = ioctl(sk, SIOCSIFNAME, &ifr);
91 err(udevice->udev, "error changing netif name %s to %s: %m\n",
92 ifr.ifr_name, ifr.ifr_newname);
96 /* wait 30 seconds for our target to become available */
97 util_strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
98 util_strlcpy(ifr.ifr_newname, udevice->name, IFNAMSIZ);
101 retval = ioctl(sk, SIOCSIFNAME, &ifr);
107 if (errno != EEXIST) {
108 err(udevice->udev, "error changing net interface name %s to %s: %m\n",
109 ifr.ifr_name, ifr.ifr_newname);
112 dbg(udevice->udev, "wait for netif '%s' to become free, loop=%i\n",
113 udevice->name, (30 * 20) - loop);
114 usleep(1000 * 1000 / 20);
123 int udev_device_event(struct udev_rules *rules, struct udevice *udevice)
127 if (udevice->devpath_old != NULL)
128 if (udev_db_rename(udevice->udev, udevice->devpath_old, udevice->dev->devpath) == 0)
129 info(udevice->udev, "moved database from '%s' to '%s'\n", udevice->devpath_old, udevice->dev->devpath);
131 /* add device node */
132 if (major(udevice->devt) != 0 &&
133 (strcmp(udevice->action, "add") == 0 || strcmp(udevice->action, "change") == 0)) {
134 struct udevice *udevice_old;
136 dbg(udevice->udev, "device node add '%s'\n", udevice->dev->devpath);
138 udev_rules_get_name(rules, udevice);
139 if (udevice->ignore_device) {
140 info(udevice->udev, "device event will be ignored\n");
143 if (udevice->name[0] == '\0') {
144 info(udevice->udev, "device node creation supressed\n");
148 /* read current database entry; cleanup, if it is known device */
149 udevice_old = udev_device_init(udevice->udev);
150 if (udevice_old != NULL) {
151 udevice_old->test_run = udevice->test_run;
152 if (udev_db_get_device(udevice_old, udevice->dev->devpath) == 0) {
153 info(udevice->udev, "device '%s' already in database, cleanup\n", udevice->dev->devpath);
154 udev_db_delete_device(udevice_old);
156 udev_device_cleanup(udevice_old);
162 retval = udev_node_add(udevice);
166 /* store in database */
167 udev_db_add_device(udevice);
169 /* create, replace, delete symlinks according to priority */
170 udev_node_update_symlinks(udevice, udevice_old);
172 if (udevice_old != NULL)
173 udev_device_cleanup(udevice_old);
178 if (strcmp(udevice->dev->subsystem, "net") == 0 && strcmp(udevice->action, "add") == 0) {
179 dbg(udevice->udev, "netif add '%s'\n", udevice->dev->devpath);
180 udev_rules_get_name(rules, udevice);
181 if (udevice->ignore_device) {
182 info(udevice->udev, "device event will be ignored\n");
185 if (udevice->name[0] == '\0') {
186 info(udevice->udev, "device renaming supressed\n");
190 /* look if we want to change the name of the netif */
191 if (strcmp(udevice->name, udevice->dev->kernel) != 0) {
192 char devpath[PATH_MAX];
195 retval = rename_netif(udevice);
198 info(udevice->udev, "renamed netif to '%s'\n", udevice->name);
200 /* export old name */
201 setenv("INTERFACE_OLD", udevice->dev->kernel, 1);
203 /* now change the devpath, because the kernel device name has changed */
204 util_strlcpy(devpath, udevice->dev->devpath, sizeof(devpath));
205 pos = strrchr(devpath, '/');
208 util_strlcat(devpath, udevice->name, sizeof(devpath));
209 sysfs_device_set_values(udevice->udev, udevice->dev, devpath, NULL, NULL);
210 setenv("DEVPATH", udevice->dev->devpath, 1);
211 setenv("INTERFACE", udevice->name, 1);
212 info(udevice->udev, "changed devpath to '%s'\n", udevice->dev->devpath);
218 /* remove device node */
219 if (major(udevice->devt) != 0 && strcmp(udevice->action, "remove") == 0) {
220 struct name_entry *name_loop;
222 /* import database entry, and delete it */
223 if (udev_db_get_device(udevice, udevice->dev->devpath) == 0) {
224 udev_db_delete_device(udevice);
225 /* restore stored persistent data */
226 list_for_each_entry(name_loop, &udevice->env_list, node)
227 putenv(name_loop->name);
229 dbg(udevice->udev, "'%s' not found in database, using kernel name '%s'\n",
230 udevice->dev->devpath, udevice->dev->kernel);
231 util_strlcpy(udevice->name, udevice->dev->kernel, sizeof(udevice->name));
234 udev_rules_get_run(rules, udevice);
235 if (udevice->ignore_device) {
236 info(udevice->udev, "device event will be ignored\n");
240 if (udevice->ignore_remove) {
241 info(udevice->udev, "ignore_remove for '%s'\n", udevice->name);
244 /* remove the node */
245 retval = udev_node_remove(udevice);
247 /* delete or restore symlinks according to priority */
248 udev_node_update_symlinks(udevice, NULL);
252 /* default devices */
253 udev_rules_get_run(rules, udevice);
254 if (udevice->ignore_device)
255 info(udevice->udev, "device event will be ignored\n");