tools/include/uapi/linux/mount.h

   1 #ifndef _UAPI_LINUX_MOUNT_H
   2 #define _UAPI_LINUX_MOUNT_H
   3
   4 /*
   5  * These are the fs-independent mount-flags: up to 32 flags are supported
   6  *
   7  * Usage of these is restricted within the kernel to core mount(2) code and
   8  * callers of sys_mount() only.  Filesystems should be using the SB_*
   9  * equivalent instead.
  10  */
  11 #define MS_RDONLY        1      /* Mount read-only */
  12 #define MS_NOSUID        2      /* Ignore suid and sgid bits */
  13 #define MS_NODEV         4      /* Disallow access to device special files */
  14 #define MS_NOEXEC        8      /* Disallow program execution */
  15 #define MS_SYNCHRONOUS  16      /* Writes are synced at once */
  16 #define MS_REMOUNT      32      /* Alter flags of a mounted FS */
  17 #define MS_MANDLOCK     64      /* Allow mandatory locks on an FS */
  18 #define MS_DIRSYNC      128     /* Directory modifications are synchronous */
  19 #define MS_NOATIME      1024    /* Do not update access times. */
  20 #define MS_NODIRATIME   2048    /* Do not update directory access times */
  21 #define MS_BIND         4096
  22 #define MS_MOVE         8192
  23 #define MS_REC          16384
  24 #define MS_VERBOSE      32768   /* War is peace. Verbosity is silence.
  25                                    MS_VERBOSE is deprecated. */
  26 #define MS_SILENT       32768
  27 #define MS_POSIXACL     (1<<16) /* VFS does not apply the umask */
  28 #define MS_UNBINDABLE   (1<<17) /* change to unbindable */
  29 #define MS_PRIVATE      (1<<18) /* change to private */
  30 #define MS_SLAVE        (1<<19) /* change to slave */
  31 #define MS_SHARED       (1<<20) /* change to shared */
  32 #define MS_RELATIME     (1<<21) /* Update atime relative to mtime/ctime. */
  33 #define MS_KERNMOUNT    (1<<22) /* this is a kern_mount call */
  34 #define MS_I_VERSION    (1<<23) /* Update inode I_version field */
  35 #define MS_STRICTATIME  (1<<24) /* Always perform atime updates */
  36 #define MS_LAZYTIME     (1<<25) /* Update the on-disk [acm]times lazily */
  37
  38 /* These sb flags are internal to the kernel */
  39 #define MS_SUBMOUNT     (1<<26)
  40 #define MS_NOREMOTELOCK (1<<27)
  41 #define MS_NOSEC        (1<<28)
  42 #define MS_BORN         (1<<29)
  43 #define MS_ACTIVE       (1<<30)
  44 #define MS_NOUSER       (1<<31)
  45
  46 /*
  47  * Superblock flags that can be altered by MS_REMOUNT
  48  */
  49 #define MS_RMT_MASK     (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
  50                          MS_LAZYTIME)
  51
  52 /*
  53  * Old magic mount flag and mask
  54  */
  55 #define MS_MGC_VAL 0xC0ED0000
  56 #define MS_MGC_MSK 0xffff0000
  57
  58 #endif /* _UAPI_LINUX_MOUNT_H */