#unconditional
MOUNT_ATTR_RDONLY
MOUNT_ATTR_NOSUID
MOUNT_ATTR_NODEV
MOUNT_ATTR_NOEXEC
MOUNT_ATTR_NOATIME
MOUNT_ATTR_STRICTATIME
MOUNT_ATTR_NODIRATIME
MOUNT_ATTR_IDMAP
MOUNT_ATTR_NOSYMFOLLOW