mount/mount_constants.h

   1 #ifndef MS_RDONLY
   2 #define MS_RDONLY        1      /* Mount read-only */
   3 #endif
   4 #ifndef MS_NOSUID
   5 #define MS_NOSUID        2      /* Ignore suid and sgid bits */
   6 #endif
   7 #ifndef MS_NODEV
   8 #define MS_NODEV         4      /* Disallow access to device special files */
   9 #endif
  10 #ifndef MS_NOEXEC
  11 #define MS_NOEXEC        8      /* Disallow program execution */
  12 #endif
  13 #ifndef MS_SYNCHRONOUS
  14 #define MS_SYNCHRONOUS  16      /* Writes are synced at once */
  15 #endif
  16 #ifndef MS_REMOUNT
  17 #define MS_REMOUNT      32      /* Alter flags of a mounted FS */
  18 #endif
  19 #ifndef MS_MANDLOCK
  20 #define MS_MANDLOCK     64      /* Allow mandatory locks on an FS */
  21 #endif
  22 #ifndef MS_ACTION_MASK
  23 #define MS_ACTION_MASK  0x380
  24 /* Remount, but new filesystem may be different from old. Atomic
  25    (i.e. there is no interval when nothing is mounted at the mountpoint).
  26    If new fs differs from the old one and old is busy - -EBUSY. */
  27 #define MS_REPLACE      0x080   /* 128 */
  28 /* After, Before: as soon as we get unions these will add a new member
  29    in the end or beginning of the chain. Fail if there is a stack
  30    on the mountpoint. */
  31 #define MS_AFTER        0x100   /* 256 */
  32 #define MS_BEFORE       0x180
  33 /* Over: if nothing mounted on a mountpoint - same as if none of these
  34 flags had been set; if we have a union with more than one element - fail;
  35 if we have a stack or plain mount - mount atop of it, forming a stack. */
  36 #define MS_OVER         0x200   /* 512 */
  37 #endif
  38 #ifndef MS_NOATIME
  39 #define MS_NOATIME      1024    /* Do not update access times. */
  40 #endif
  41 #ifndef MS_NODIRATIME
  42 #define MS_NODIRATIME   2048    /* Do not update directory access times */
  43 #endif
  44 #ifndef MS_BIND
  45 #define MS_BIND         4096
  46 #endif
  47 /*
  48  * Magic mount flag number. Has to be or-ed to the flag values.
  49  */
  50 #ifndef MS_MGC_VAL
  51 #define MS_MGC_VAL 0xC0ED0000   /* magic flag number to indicate "new" flags */
  52 #endif
  53 #ifndef MS_MGC_MSK
  54 #define MS_MGC_MSK 0xffff0000   /* magic flag number mask */
  55 #endif