1 /* Header file for mounting/unmount Linux filesystems. 2 Copyright (C) 1996-2000, 2004, 2010 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 /* This is taken from /usr/include/linux/fs.h. */ 21 22 #ifndef _SYS_MOUNT_H 23 #define _SYS_MOUNT_H 1 24 25 #include <features.h> 26 #include <sys/ioctl.h> 27 28 #define BLOCK_SIZE 1024 29 #define BLOCK_SIZE_BITS 10 30 31 32 /* These are the fs-independent mount-flags: up to 16 flags are 33 supported */ 34 enum 35 { 36 MS_RDONLY = 1, /* Mount read-only. */ 37 #define MS_RDONLY MS_RDONLY 38 MS_NOSUID = 2, /* Ignore suid and sgid bits. */ 39 #define MS_NOSUID MS_NOSUID 40 MS_NODEV = 4, /* Disallow access to device special files. */ 41 #define MS_NODEV MS_NODEV 42 MS_NOEXEC = 8, /* Disallow program execution. */ 43 #define MS_NOEXEC MS_NOEXEC 44 MS_SYNCHRONOUS = 16, /* Writes are synced at once. */ 45 #define MS_SYNCHRONOUS MS_SYNCHRONOUS 46 MS_REMOUNT = 32, /* Alter flags of a mounted FS. */ 47 #define MS_REMOUNT MS_REMOUNT 48 MS_MANDLOCK = 64, /* Allow mandatory locks on an FS. */ 49 #define MS_MANDLOCK MS_MANDLOCK 50 MS_DIRSYNC = 128, /* Directory modifications are synchronous. */ 51 #define MS_DIRSYNC MS_DIRSYNC 52 MS_NOATIME = 1024, /* Do not update access times. */ 53 #define MS_NOATIME MS_NOATIME 54 MS_NODIRATIME = 2048, /* Do not update directory access times. */ 55 #define MS_NODIRATIME MS_NODIRATIME 56 MS_BIND = 4096, /* Bind directory at different place. */ 57 #define MS_BIND MS_BIND 58 MS_MOVE = 8192, 59 #define MS_MOVE MS_MOVE 60 MS_REC = 16384, 61 #define MS_REC MS_REC 62 MS_SILENT = 32768, 63 #define MS_SILENT MS_SILENT 64 MS_POSIXACL = 1 << 16, /* VFS does not apply the umask. */ 65 #define MS_POSIXACL MS_POSIXACL 66 MS_UNBINDABLE = 1 << 17, /* Change to unbindable. */ 67 #define MS_UNBINDABLE MS_UNBINDABLE 68 MS_PRIVATE = 1 << 18, /* Change to private. */ 69 #define MS_PRIVATE MS_PRIVATE 70 MS_SLAVE = 1 << 19, /* Change to slave. */ 71 #define MS_SLAVE MS_SLAVE 72 MS_SHARED = 1 << 20, /* Change to shared. */ 73 #define MS_SHARED MS_SHARED 74 MS_RELATIME = 1 << 21, /* Update atime relative to mtime/ctime. */ 75 #define MS_RELATIME MS_RELATIME 76 MS_KERNMOUNT = 1 << 22, /* This is a kern_mount call. */ 77 #define MS_KERNMOUNT MS_KERNMOUNT 78 MS_I_VERSION = 1 << 23, /* Update inode I_version field. */ 79 #define MS_I_VERSION MS_I_VERSION 80 MS_STRICTATIME = 1 << 24, /* Always perform atime updates. */ 81 #define MS_STRICTATIME MS_STRICTATIME 82 MS_ACTIVE = 1 << 30, 83 #define MS_ACTIVE MS_ACTIVE 84 MS_NOUSER = 1 << 31 85 #define MS_NOUSER MS_NOUSER 86 }; 87 88 /* Flags that can be altered by MS_REMOUNT */ 89 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION) 90 91 92 /* Magic mount flag number. Has to be or-ed to the flag values. */ 93 94 #define MS_MGC_VAL 0xc0ed0000 /* Magic flag number to indicate "new" flags */ 95 #define MS_MGC_MSK 0xffff0000 /* Magic flag number mask */ 96 97 98 /* The read-only stuff doesn't really belong here, but any other place 99 is probably as bad and I don't want to create yet another include 100 file. */ 101 102 #define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */ 103 #define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */ 104 #define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */ 105 #define BLKGETSIZE _IO(0x12, 96) /* Return device size. */ 106 #define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */ 107 #define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */ 108 #define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */ 109 #define BLKFRASET _IO(0x12,100) /* Set filesystem read-ahead. */ 110 #define BLKFRAGET _IO(0x12,101) /* Get filesystem read-ahead. */ 111 #define BLKSECTSET _IO(0x12,102) /* Set max sectors per request. */ 112 #define BLKSECTGET _IO(0x12,103) /* Get max sectors per request. */ 113 #define BLKSSZGET _IO(0x12,104) /* Get block device sector size. */ 114 #define BLKBSZGET _IOR(0x12,112,size_t) 115 #define BLKBSZSET _IOW(0x12,113,size_t) 116 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size. */ 117 118 119 /* Possible value for FLAGS parameter of `umount2'. */ 120 enum 121 { 122 MNT_FORCE = 1, /* Force unmounting. */ 123 #define MNT_FORCE MNT_FORCE 124 MNT_DETACH = 2, /* Just detach from the tree. */ 125 #define MNT_DETACH MNT_DETACH 126 MNT_EXPIRE = 4, /* Mark for expiry. */ 127 #define MNT_EXPIRE MNT_EXPIRE 128 UMOUNT_NOFOLLOW = 8 /* Don't follow symlink on umount. */ 129 #define UMOUNT_NOFOLLOW UMOUNT_NOFOLLOW 130 }; 131 132 133 __BEGIN_DECLS 134 135 /* Mount a filesystem. */ 136 extern int mount (__const char *__special_file, __const char *__dir, 137 __const char *__fstype, unsigned long int __rwflag, 138 __const void *__data) __THROW; 139 140 /* Unmount a filesystem. */ 141 extern int umount (__const char *__special_file) __THROW; 142 143 /* Unmount a filesystem. Force unmounting if FLAGS is set to MNT_FORCE. */ 144 extern int umount2 (__const char *__special_file, int __flags) __THROW; 145 146 __END_DECLS 147 148 #endif /* _SYS_MOUNT_H */ 149
