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);
150 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
152 struct udev_device *dev = event->dev;
155 if (udev_device_get_devpath_old(dev) != NULL) {
156 if (udev_device_rename_db(dev, udev_device_get_devpath(dev)) == 0)
157 info(event->udev, "moved database from '%s' to '%s'\n",
158 udev_device_get_devpath_old(dev), udev_device_get_devpath(dev));
161 /* add device node */
162 if (major(udev_device_get_devnum(dev)) != 0 &&
163 (strcmp(udev_device_get_action(dev), "add") == 0 || strcmp(udev_device_get_action(dev), "change") == 0)) {
164 char filename[UTIL_PATH_SIZE];
165 struct udev_device *dev_old;
167 dbg(event->udev, "device node add '%s'\n", udev_device_get_devpath(dev));
169 udev_rules_get_name(rules, event);
170 if (event->ignore_device) {
171 info(event->udev, "device event will be ignored\n");
175 if (event->name[0] == '\0') {
176 info(event->udev, "device node creation supressed\n");
180 /* set device node name */
181 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
182 util_strlcat(filename, "/", sizeof(filename));
183 util_strlcat(filename, event->name, sizeof(filename));
184 udev_device_set_devnode(dev, filename);
186 /* read current database entry; cleanup, if it is known device */
187 dev_old = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
188 if (dev_old != NULL) {
189 info(event->udev, "device '%s' already in database, updating\n",
190 udev_device_get_devpath(dev));
191 udev_node_update_old_links(dev, dev_old, event->test);
192 udev_device_unref(dev_old);
195 udev_device_update_db(dev);
197 err = udev_node_add(dev, event->mode, event->owner, event->group, event->test);
205 if (strcmp(udev_device_get_subsystem(dev), "net") == 0 && strcmp(udev_device_get_action(dev), "add") == 0) {
206 dbg(event->udev, "netif add '%s'\n", udev_device_get_devpath(dev));
208 udev_rules_get_name(rules, event);
209 if (event->ignore_device) {
210 info(event->udev, "device event will be ignored\n");
213 if (event->name[0] == '\0') {
214 info(event->udev, "device renaming supressed\n");
218 /* look if we want to change the name of the netif */
219 if (strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
220 char syspath[UTIL_PATH_SIZE];
223 err = rename_netif(event);
226 info(event->udev, "renamed netif to '%s'\n", event->name);
228 /* remember old name */
229 udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
231 /* now change the devpath, because the kernel device name has changed */
232 util_strlcpy(syspath, udev_device_get_syspath(dev), sizeof(syspath));
233 pos = strrchr(syspath, '/');
236 util_strlcat(syspath, event->name, sizeof(syspath));
237 udev_device_set_syspath(event->dev, syspath);
238 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
239 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
245 /* remove device node */
246 if (major(udev_device_get_devnum(dev)) != 0 && strcmp(udev_device_get_action(dev), "remove") == 0) {
247 /* import database entry and delete it */
248 udev_device_read_db(dev);
250 udev_device_delete_db(dev);
252 if (udev_device_get_devnode(dev) == NULL) {
253 char devnode[UTIL_PATH_SIZE];
255 info(event->udev, "'%s' not found in database, using kernel name '%s'\n",
256 udev_device_get_syspath(dev), udev_device_get_sysname(dev));
257 util_strlcpy(devnode, udev_get_dev_path(event->udev), sizeof(devnode));
258 util_strlcat(devnode, "/", sizeof(devnode));
259 util_strlcat(devnode, udev_device_get_sysname(dev), sizeof(devnode));
260 udev_device_set_devnode(dev, devnode);
263 udev_rules_get_run(rules, event);
264 if (event->ignore_device) {
265 info(event->udev, "device event will be ignored\n");
269 if (udev_device_get_ignore_remove(dev)) {
270 info(event->udev, "ignore_remove for '%s'\n", udev_device_get_devnode(dev));
274 err = udev_node_remove(dev, event->test);
278 /* default devices */
279 udev_rules_get_run(rules, event);
280 if (event->ignore_device)
281 info(event->udev, "device event will be ignored\n");
286 int udev_event_execute_run(struct udev_event *event)
288 struct udev_list_entry *list_entry;
291 dbg(event->udev, "executing run list\n");
292 udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
293 const char *cmd = udev_list_entry_get_name(list_entry);
295 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
296 struct udev_monitor *monitor;
298 monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
301 udev_monitor_send_device(monitor, event->dev);
302 udev_monitor_unref(monitor);
304 char program[UTIL_PATH_SIZE];
307 util_strlcpy(program, cmd, sizeof(program));
308 udev_rules_apply_format(event, program, sizeof(program));
309 envp = udev_device_get_properties_envp(event->dev);
310 if (run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
311 if (!udev_list_entry_get_flag(list_entry))