Linux kernel mirror (for testing)
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linux
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 */