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 /* 59 * open_tree() flags. 60 */ 61 #define OPEN_TREE_CLONE 1 /* Clone the target tree and attach the clone */ 62 #define OPEN_TREE_CLOEXEC O_CLOEXEC /* Close the file on execve() */ 63 64 /* 65 * move_mount() flags. 66 */ 67 #define MOVE_MOUNT_F_SYMLINKS 0x00000001 /* Follow symlinks on from path */ 68 #define MOVE_MOUNT_F_AUTOMOUNTS 0x00000002 /* Follow automounts on from path */ 69 #define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */ 70 #define MOVE_MOUNT_T_SYMLINKS 0x00000010 /* Follow symlinks on to path */ 71 #define MOVE_MOUNT_T_AUTOMOUNTS 0x00000020 /* Follow automounts on to path */ 72 #define MOVE_MOUNT_T_EMPTY_PATH 0x00000040 /* Empty to path permitted */ 73 #define MOVE_MOUNT__MASK 0x00000077 74 75 /* 76 * fsopen() flags. 77 */ 78 #define FSOPEN_CLOEXEC 0x00000001 79 80 /* 81 * fspick() flags. 82 */ 83 #define FSPICK_CLOEXEC 0x00000001 84 #define FSPICK_SYMLINK_NOFOLLOW 0x00000002 85 #define FSPICK_NO_AUTOMOUNT 0x00000004 86 #define FSPICK_EMPTY_PATH 0x00000008 87 88 /* 89 * The type of fsconfig() call made. 90 */ 91 enum fsconfig_command { 92 FSCONFIG_SET_FLAG = 0, /* Set parameter, supplying no value */ 93 FSCONFIG_SET_STRING = 1, /* Set parameter, supplying a string value */ 94 FSCONFIG_SET_BINARY = 2, /* Set parameter, supplying a binary blob value */ 95 FSCONFIG_SET_PATH = 3, /* Set parameter, supplying an object by path */ 96 FSCONFIG_SET_PATH_EMPTY = 4, /* Set parameter, supplying an object by (empty) path */ 97 FSCONFIG_SET_FD = 5, /* Set parameter, supplying an object by fd */ 98 FSCONFIG_CMD_CREATE = 6, /* Invoke superblock creation */ 99 FSCONFIG_CMD_RECONFIGURE = 7, /* Invoke superblock reconfiguration */ 100 }; 101 102 /* 103 * fsmount() flags. 104 */ 105 #define FSMOUNT_CLOEXEC 0x00000001 106 107 /* 108 * Mount attributes. 109 */ 110 #define MOUNT_ATTR_RDONLY 0x00000001 /* Mount read-only */ 111 #define MOUNT_ATTR_NOSUID 0x00000002 /* Ignore suid and sgid bits */ 112 #define MOUNT_ATTR_NODEV 0x00000004 /* Disallow access to device special files */ 113 #define MOUNT_ATTR_NOEXEC 0x00000008 /* Disallow program execution */ 114 #define MOUNT_ATTR__ATIME 0x00000070 /* Setting on how atime should be updated */ 115 #define MOUNT_ATTR_RELATIME 0x00000000 /* - Update atime relative to mtime/ctime. */ 116 #define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */ 117 #define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */ 118 #define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */ 119 120 #endif /* _UAPI_LINUX_MOUNT_H */ 121