}
return makedev(0, 0);
}
-
-static void kernel_log(struct ifreq ifr)
-{
- int klog;
- FILE *f;
-
- klog = open("/dev/kmsg", O_WRONLY);
- if (klog < 0)
- return;
-
- f = fdopen(klog, "w");
- if (f == NULL) {
- close(klog);
- return;
- }
-
- fprintf(f, "<6>udev: renamed network interface %s to %s\n",
- ifr.ifr_name, ifr.ifr_newname);
- fclose(f);
-}
-
-static int rename_netif(struct udevice *udev)
-{
- int sk;
- struct ifreq ifr;
- int retval;
-
- info("changing net interface name from '%s' to '%s'\n", udev->dev->kernel, udev->name);
- if (udev->test_run)
- return 0;
-
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0) {
- err("error opening socket: %s\n", strerror(errno));
- return -1;
- }
-
- memset(&ifr, 0x00, sizeof(struct ifreq));
- strlcpy(ifr.ifr_name, udev->dev->kernel, IFNAMSIZ);
- strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
- retval = ioctl(sk, SIOCSIFNAME, &ifr);
- if (retval == 0)
- kernel_log(ifr);
- else {
- int loop;
-
- /* see if the destination interface name already exists */
- if (errno != EEXIST) {
- err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno));
- goto exit;
- }
-
- /* free our own name, another process may wait for us */
- strlcpy(ifr.ifr_newname, udev->dev->kernel, IFNAMSIZ);
- strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ);
- retval = ioctl(sk, SIOCSIFNAME, &ifr);
- if (retval != 0) {
- err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno));
- goto exit;
- }
-
- /* wait 30 seconds for our target to become available */
- strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ);
- strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
- loop = 30 * 20;
- while (loop--) {
- retval = ioctl(sk, SIOCSIFNAME, &ifr);
- if (retval == 0) {
- kernel_log(ifr);
- break;
- }
-
- if (errno != EEXIST) {
- err("error changing net interface name %s to %s: %s\n",
- ifr.ifr_name, ifr.ifr_newname, strerror(errno));
- break;
- }
- dbg("wait for netif '%s' to become free, loop=%i\n", udev->name, (30 * 20) - loop);
- usleep(1000 * 1000 / 20);
- }
- }
-
-exit:
- close(sk);
- return retval;
-}
-
-int udev_device_event(struct udev_rules *rules, struct udevice *udev)
-{
- int retval = 0;
-
- if (udev->devpath_old != NULL)
- if (udev_db_rename(udev->devpath_old, udev->dev->devpath) == 0)
- info("moved database from '%s' to '%s'\n", udev->devpath_old, udev->dev->devpath);
-
- /* add device node */
- if (major(udev->devt) != 0 &&
- (strcmp(udev->action, "add") == 0 || strcmp(udev->action, "change") == 0)) {
- struct udevice *udev_old;
-
- dbg("device node add '%s'\n", udev->dev->devpath);
-
- udev_rules_get_name(rules, udev);
- if (udev->ignore_device) {
- info("device event will be ignored\n");
- goto exit;
- }
- if (udev->name[0] == '\0') {
- info("device node creation supressed\n");
- goto exit;
- }
-
- /* read current database entry; cleanup, if it is known device */
- udev_old = udev_device_init(NULL);
- if (udev_old != NULL) {
- udev_old->test_run = udev->test_run;
- if (udev_db_get_device(udev_old, udev->dev->devpath) == 0) {
- info("device '%s' already in database, cleanup\n", udev->dev->devpath);
- udev_db_delete_device(udev_old);
- } else {
- udev_device_cleanup(udev_old);
- udev_old = NULL;
- }
- }
-
- /* create node */
- retval = udev_node_add(udev);
- if (retval != 0)
- goto exit;
-
- /* store in database */
- udev_db_add_device(udev);
-
- /* create, replace, delete symlinks according to priority */
- udev_node_update_symlinks(udev, udev_old);
-
- if (udev_old != NULL)
- udev_device_cleanup(udev_old);
- goto exit;
- }
-
- /* add netif */
- if (strcmp(udev->dev->subsystem, "net") == 0 && strcmp(udev->action, "add") == 0) {
- dbg("netif add '%s'\n", udev->dev->devpath);
- udev_rules_get_name(rules, udev);
- if (udev->ignore_device) {
- info("device event will be ignored\n");
- goto exit;
- }
- if (udev->name[0] == '\0') {
- info("device renaming supressed\n");
- goto exit;
- }
-
- /* look if we want to change the name of the netif */
- if (strcmp(udev->name, udev->dev->kernel) != 0) {
- char devpath[PATH_MAX];
- char *pos;
-
- retval = rename_netif(udev);
- if (retval != 0)
- goto exit;
- info("renamed netif to '%s'\n", udev->name);
-
- /* export old name */
- setenv("INTERFACE_OLD", udev->dev->kernel, 1);
-
- /* now change the devpath, because the kernel device name has changed */
- strlcpy(devpath, udev->dev->devpath, sizeof(devpath));
- pos = strrchr(devpath, '/');
- if (pos != NULL) {
- pos[1] = '\0';
- strlcat(devpath, udev->name, sizeof(devpath));
- sysfs_device_set_values(udev->dev, devpath, NULL, NULL);
- setenv("DEVPATH", udev->dev->devpath, 1);
- setenv("INTERFACE", udev->name, 1);
- info("changed devpath to '%s'\n", udev->dev->devpath);
- }
- }
- goto exit;
- }
-
- /* remove device node */
- if (major(udev->devt) != 0 && strcmp(udev->action, "remove") == 0) {
- struct name_entry *name_loop;
-
- /* import database entry, and delete it */
- if (udev_db_get_device(udev, udev->dev->devpath) == 0) {
- udev_db_delete_device(udev);
- /* restore stored persistent data */
- list_for_each_entry(name_loop, &udev->env_list, node)
- putenv(name_loop->name);
- } else {
- dbg("'%s' not found in database, using kernel name '%s'\n",
- udev->dev->devpath, udev->dev->kernel);
- strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
- }
-
- udev_rules_get_run(rules, udev);
- if (udev->ignore_device) {
- info("device event will be ignored\n");
- goto exit;
- }
-
- if (udev->ignore_remove) {
- info("ignore_remove for '%s'\n", udev->name);
- goto exit;
- }
- /* remove the node */
- retval = udev_node_remove(udev);
-
- /* delete or restore symlinks according to priority */
- udev_node_update_symlinks(udev, NULL);
- goto exit;
- }
-
- /* default devices */
- udev_rules_get_run(rules, udev);
- if (udev->ignore_device)
- info("device event will be ignored\n");
-
-exit:
- return retval;
-}
~ianmdlvl / elogind.git / blobdiff