+ free(udev);
+}
+
+dev_t udev_device_get_devt(struct udevice *udev)
+{
+ const char *attr;
+ unsigned int major, minor;
+
+ /* read it from sysfs */
+ attr = sysfs_attr_get_value(udev->dev->devpath, "dev");
+ if (attr != NULL) {
+ if (sscanf(attr, "%u:%u", &major, &minor) == 2)
+ return makedev(major, minor);
+ }
+ return makedev(0, 0);
+}
+
+static int rename_net_if(struct udevice *udev)
+{
+ int sk;
+ struct ifreq ifr;
+ int retval;
+
+ info("changing net interface name from '%s' to '%s'", udev->dev->kernel_name, udev->name);
+ if (udev->test_run)
+ return 0;
+
+ sk = socket(PF_INET, SOCK_DGRAM, 0);
+ if (sk < 0) {
+ err("error opening socket: %s", strerror(errno));
+ return -1;
+ }
+
+ memset(&ifr, 0x00, sizeof(struct ifreq));
+ strlcpy(ifr.ifr_name, udev->dev->kernel_name, IFNAMSIZ);
+ strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
+
+ retval = ioctl(sk, SIOCSIFNAME, &ifr);
+ if (retval != 0)
+ err("error changing net interface name: %s", strerror(errno));
+ close(sk);
+
+ return retval;
+}
+
+int udev_device_event(struct udev_rules *rules, struct udevice *udev)
+{
+ int retval = 0;
+
+ /* add device node */
+ if (major(udev->devt) != 0 && strcmp(udev->action, "add") == 0) {
+ struct udevice *udev_old;
+
+ dbg("device node add '%s'", udev->dev->devpath);
+
+ udev_rules_get_name(rules, udev);
+ if (udev->ignore_device) {
+ info("device event will be ignored");
+ goto exit;
+ }
+ if (udev->name[0] == '\0') {
+ info("device node creation supressed");
+ goto exit;
+ }
+
+ /* read current database entry, we may want to cleanup symlinks */
+ udev_old = udev_device_init();
+ if (udev_old != NULL) {
+ if (udev_db_get_device(udev_old, udev->dev->devpath) == 0) {
+ info("device '%s' already known, remove possible symlinks", udev->dev->devpath);
+ udev_node_remove_symlinks(udev_old);
+ }
+ udev_device_cleanup(udev_old);
+ }
+
+ /* create node and symlinks, store record in database */
+ retval = udev_node_add(udev, udev_old);
+ if (retval == 0)
+ udev_db_add_device(udev);
+ goto exit;
+ }
+
+ /* add netif */
+ if (strcmp(udev->dev->subsystem, "net") == 0 && strcmp(udev->action, "add") == 0) {
+ dbg("netif add '%s'", udev->dev->devpath);
+ udev_rules_get_name(rules, udev);
+ if (udev->ignore_device) {
+ info("device event will be ignored");
+ goto exit;
+ }
+
+ /* look if we want to change the name of the netif */
+ if (strcmp(udev->name, udev->dev->kernel_name) != 0) {
+ char *pos;
+
+ retval = rename_net_if(udev);
+ if (retval != 0)
+ goto exit;
+ info("renamed netif to '%s'", udev->name);
+
+ /* export old name */
+ setenv("INTERFACE_OLD", udev->dev->kernel_name, 1);
+
+ /* now fake the devpath, because the kernel name changed silently */
+ pos = strrchr(udev->dev->devpath, '/');
+ if (pos != NULL) {
+ pos[1] = '\0';
+ strlcat(udev->dev->devpath, udev->name, sizeof(udev->dev->devpath));
+ strlcpy(udev->dev->kernel_name, udev->name, sizeof(udev->dev->kernel_name));
+ setenv("DEVPATH", udev->dev->devpath, 1);
+ setenv("INTERFACE", udev->name, 1);
+ }
+ }
+ goto exit;
+ }
+
+ /* remove device node */
+ if (major(udev->devt) != 0 && strcmp(udev->action, "remove") == 0) {
+ struct name_entry *name_loop;
+
+ /* import and delete database entry */
+ if (udev_db_get_device(udev, udev->dev->devpath) == 0) {
+ udev_db_delete_device(udev);
+ if (udev->ignore_remove) {
+ dbg("remove event for '%s' requested to be ignored by rule", udev->name);
+ return 0;
+ }
+ /* 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'", udev->dev->devpath, udev->dev->kernel_name);
+ strlcpy(udev->name, udev->dev->kernel_name, sizeof(udev->name));
+ }
+
+ udev_rules_get_run(rules, udev);
+ if (udev->ignore_device) {
+ info("device event will be ignored");
+ goto exit;
+ }
+
+ retval = udev_node_remove(udev);
+ goto exit;
+ }
+
+ /* default devices */
+ udev_rules_get_run(rules, udev);
+ if (udev->ignore_device)
+ info("device event will be ignored");
+
+exit:
+ return retval;