-int open_device(JCR *jcr, DEVICE *dev);
-int first_open_device(DEVICE *dev);
-bool fixup_device_block_write_error(DCR *dcr, DEV_BLOCK *block);
-void _lock_device(const char *file, int line, DEVICE *dev);
-void _unlock_device(const char *file, int line, DEVICE *dev);
-void _block_device(const char *file, int line, DEVICE *dev, int state);
-void _unblock_device(const char *file, int line, DEVICE *dev);
-void _steal_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold, int state);
-void _give_back_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold);
-void set_new_volume_parameters(DCR *dcr);
-void set_new_file_parameters(DCR *dcr);
-int device_is_unmounted(DEVICE *dev);
-void dev_lock(DEVICE *dev);
-void dev_unlock(DEVICE *dev);
+int open_device(JCR *jcr, DEVICE *dev);
+int first_open_device(DEVICE *dev);
+bool fixup_device_block_write_error(DCR *dcr, DEV_BLOCK *block);
+void _lock_device(const char *file, int line, DEVICE *dev);
+void _unlock_device(const char *file, int line, DEVICE *dev);
+void _block_device(const char *file, int line, DEVICE *dev, int state);
+void _unblock_device(const char *file, int line, DEVICE *dev);
+void _steal_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold, int state);
+void _give_back_device_lock(const char *file, int line, DEVICE *dev, bsteal_lock_t *hold);
+void set_new_volume_parameters(DCR *dcr);
+void set_new_file_parameters(DCR *dcr);
+bool device_is_unmounted(DEVICE *dev);
+void dev_lock(DEVICE *dev);
+void dev_unlock(DEVICE *dev);
+const char *edit_blocked_reason(DEVICE *dev);