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 || strcmp(udev->action, "change") == 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) {
udev_device_cleanup(udev_old);
udev_old = NULL;
} else
info("device '%s' already in database, validate currently present symlinks",
udev->dev->devpath);
}
/* create node and symlinks */
retval = udev_node_add(udev, udev_old);
if (retval == 0) {
/* store record in database */
udev_db_add_device(udev);
/* remove possibly left-over symlinks */
if (udev_old != NULL) {
struct name_entry *link_loop;
struct name_entry *link_old_loop;
struct name_entry *link_old_tmp_loop;
/* remove still valid symlinks from old list */
list_for_each_entry_safe(link_old_loop, link_old_tmp_loop, &udev_old->symlink_list, node)
list_for_each_entry(link_loop, &udev->symlink_list, node)
if (strcmp(link_old_loop->name, link_loop->name) == 0) {
dbg("symlink '%s' still valid, keep it", link_old_loop->name);
list_del(&link_old_loop->node);
free(link_old_loop);
}
udev_node_remove_symlinks(udev_old);
udev_device_cleanup(udev_old);
}
}
goto exit;
}
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 || strcmp(udev->action, "change") == 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; 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", 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'", 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 renaming supressed");
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'", 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'", 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);
if (udev->ignore_remove) {
info("ignore_remove for '%s'", udev->name);
goto exit;
}
/* 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);
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");
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");
exit:
return retval;
}