ST_VALID 0x0020
ST_RDONLY 0x0001
ST_NOSUID 0x0002
ST_NODEV 0x0004
ST_NOEXEC 0x0008
ST_SYNCHRONOUS 0x0010
ST_MANDLOCK 0x0040
ST_NOATIME 0x0400
ST_NODIRATIME 0x0800
ST_RELATIME 0x1000
