# /efs
allow vold efs_file:dir r_dir_perms;
# /dev/block/mmcblk0p[0-9]
allow vold emmcblk_device:dir create_dir_perms;
allow vold emmcblk_device:blk_file { setattr unlink rw_file_perms };

allow vold sysfs_mmc:file w_file_perms;
r_dir_file(vold, proc_dt_firmware)