1MS_RDONLY 1 2MS_NOSUID 2 3MS_NODEV 4 4MS_NOEXEC 8 5MS_SYNCHRONOUS 16 6MS_REMOUNT 32 7MS_MANDLOCK 64 8MS_DIRSYNC 128 9MS_NOATIME 1024 10MS_NODIRATIME 2048 11MS_BIND 4096 12MS_MOVE 8192 13MS_REC 16384 14MS_SILENT 32768 15MS_POSIXACL (1<<16) 16MS_UNBINDABLE (1<<17) 17MS_PRIVATE (1<<18) 18MS_SLAVE (1<<19) 19MS_SHARED (1<<20) 20MS_RELATIME (1<<21) 21MS_KERNMOUNT (1<<22) 22MS_I_VERSION (1<<23) 23MS_STRICTATIME (1<<24) 24MS_LAZYTIME (1<<25) 25MS_SUBMOUNT (1<<26) 26MS_NOREMOTELOCK (1<<27) 27MS_NOSEC (1<<28) 28MS_BORN (1<<29) 29MS_ACTIVE (1<<30) 30MS_NOUSER (1<<31) 31