Merge pull request #20603 from yuwata/udev-node-cleanups

udev: cleanups for creating/removing device node symlinks

src/libsystemd/sd-device/device-private.h

@@ -32,6 +32,7 @@ void device_set_db_persist(sd_device *device);
 void device_set_devlink_priority(sd_device *device, int priority);
 int device_ensure_usec_initialized(sd_device *device, sd_device *device_old);
 int device_add_devlink(sd_device *device, const char *devlink);
+bool device_has_devlink(sd_device *device, const char *devlink);
 int device_add_property(sd_device *device, const char *property, const char *value);
 int device_add_tag(sd_device *device, const char *tag, bool both);
 void device_remove_tag(sd_device *device, const char *tag);

src/libsystemd/sd-device/sd-device.c

@@ -1205,6 +1205,13 @@ int device_add_devlink(sd_device *device, const char *devlink) {
         return 0;
 }
 
+bool device_has_devlink(sd_device *device, const char *devlink) {
+        assert(device);
+        assert(devlink);
+
+        return set_contains(device->devlinks, devlink);
+}
+
 static int device_add_property_internal_from_string(sd_device *device, const char *str) {
         _cleanup_free_ char *key = NULL;
         char *value;