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#ifndef MS_RDONLY
#define MS_RDONLY 1 /* Mount read-only */
#endif
#ifndef MS_NOSUID
#define MS_NOSUID 2 /* Ignore suid and sgid bits */
#endif
#ifndef MS_NODEV
#define MS_NODEV 4 /* Disallow access to device special files */
#endif
#ifndef MS_NOEXEC
#define MS_NOEXEC 8 /* Disallow program execution */
#endif
#ifndef MS_SYNCHRONOUS
#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
#endif
#ifndef MS_REMOUNT
#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
#endif
#ifndef MS_MANDLOCK
#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
#endif
#ifndef MS_DIRSYNC
#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
#endif
#ifndef MS_ACTION_MASK
#define MS_ACTION_MASK 0x380
/* Remount, but new filesystem may be different from old. Atomic
(i.e. there is no interval when nothing is mounted at the mountpoint).
If new fs differs from the old one and old is busy - -EBUSY. */
#define MS_REPLACE 0x080 /* 128 */
/* After, Before: as soon as we get unions these will add a new member
in the end or beginning of the chain. Fail if there is a stack
on the mountpoint. */
#define MS_AFTER 0x100 /* 256 */
#define MS_BEFORE 0x180
/* Over: if nothing mounted on a mountpoint - same as if none of these
flags had been set; if we have a union with more than one element - fail;
if we have a stack or plain mount - mount atop of it, forming a stack. */
#define MS_OVER 0x200 /* 512 */
#endif
#ifndef MS_NOATIME
#define MS_NOATIME 0x400 /* 1024: Do not update access times. */
#endif
#ifndef MS_NODIRATIME
#define MS_NODIRATIME 0x800 /* 2048: Don't update directory access times */
#endif
#ifndef MS_BIND
#define MS_BIND 0x1000 /* 4096: Mount existing tree also elsewhere */
#endif
#ifndef MS_MOVE
#define MS_MOVE 0x2000 /* 8192: Atomically move tree */
#endif
/*
* Magic mount flag number. Has to be or-ed to the flag values.
*/
#ifndef MS_MGC_VAL
#define MS_MGC_VAL 0xC0ED0000 /* magic flag number to indicate "new" flags */
#endif
#ifndef MS_MGC_MSK
#define MS_MGC_MSK 0xffff0000 /* magic flag number mask */
#endif
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