1 /* Header file for mounting/unmount Linux filesystems. 2 Copyright (C) 1996-2000, 2004, 2010, 2012 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, see 17 <http://www.gnu.org/licenses/>. */ 18 19 /* This is taken from /usr/include/linux/fs.h. */ 20 21 #ifndef _SYS_MOUNT_H 22 #define _SYS_MOUNT_H 1 23 24 #include <features.h> 25 #include <sys/ioctl.h> 26 27 #define BLOCK_SIZE 1024 28 #define BLOCK_SIZE_BITS 10 29 30 31 /* These are the fs-independent mount-flags: up to 16 flags are 32 supported */ 33 enum 34 { 35 MS_RDONLY = 1, /* Mount read-only. */ 36 #define MS_RDONLY MS_RDONLY 37 MS_NOSUID = 2, /* Ignore suid and sgid bits. */ 38 #define MS_NOSUID MS_NOSUID 39 MS_NODEV = 4, /* Disallow access to device special files. */ 40 #define MS_NODEV MS_NODEV 41 MS_NOEXEC = 8, /* Disallow program execution. */ 42 #define MS_NOEXEC MS_NOEXEC 43 MS_SYNCHRONOUS = 16, /* Writes are synced at once. */ 44 #define MS_SYNCHRONOUS MS_SYNCHRONOUS 45 MS_REMOUNT = 32, /* Alter flags of a mounted FS. */ 46 #define MS_REMOUNT MS_REMOUNT 47 MS_MANDLOCK = 64, /* Allow mandatory locks on an FS. */ 48 #define MS_MANDLOCK MS_MANDLOCK 49 MS_DIRSYNC = 128, /* Directory modifications are synchronous. */ 50 #define MS_DIRSYNC MS_DIRSYNC 51 MS_NOATIME = 1024, /* Do not update access times. */ 52 #define MS_NOATIME MS_NOATIME 53 MS_NODIRATIME = 2048, /* Do not update directory access times. */ 54 #define MS_NODIRATIME MS_NODIRATIME 55 MS_BIND = 4096, /* Bind directory at different place. */ 56 #define MS_BIND MS_BIND 57 MS_MOVE = 8192, 58 #define MS_MOVE MS_MOVE 59 MS_REC = 16384, 60 #define MS_REC MS_REC 61 MS_SILENT = 32768, 62 #define MS_SILENT MS_SILENT 63 MS_POSIXACL = 1 << 16, /* VFS does not apply the umask. */ 64 #define MS_POSIXACL MS_POSIXACL 65 MS_UNBINDABLE = 1 << 17, /* Change to unbindable. */ 66 #define MS_UNBINDABLE MS_UNBINDABLE 67 MS_PRIVATE = 1 << 18, /* Change to private. */ 68 #define MS_PRIVATE MS_PRIVATE 69 MS_SLAVE = 1 << 19, /* Change to slave. */ 70 #define MS_SLAVE MS_SLAVE 71 MS_SHARED = 1 << 20, /* Change to shared. */ 72 #define MS_SHARED MS_SHARED 73 MS_RELATIME = 1 << 21, /* Update atime relative to mtime/ctime. */ 74 #define MS_RELATIME MS_RELATIME 75 MS_KERNMOUNT = 1 << 22, /* This is a kern_mount call. */ 76 #define MS_KERNMOUNT MS_KERNMOUNT 77 MS_I_VERSION = 1 << 23, /* Update inode I_version field. */ 78 #define MS_I_VERSION MS_I_VERSION 79 MS_STRICTATIME = 1 << 24, /* Always perform atime updates. */ 80 #define MS_STRICTATIME MS_STRICTATIME 81 MS_ACTIVE = 1 << 30, 82 #define MS_ACTIVE MS_ACTIVE 83 MS_NOUSER = 1 << 31 84 #define MS_NOUSER MS_NOUSER 85 }; 86 87 /* Flags that can be altered by MS_REMOUNT */ 88 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION) 89 90 91 /* Magic mount flag number. Has to be or-ed to the flag values. */ 92 93 #define MS_MGC_VAL 0xc0ed0000 /* Magic flag number to indicate "new" flags */ 94 #define MS_MGC_MSK 0xffff0000 /* Magic flag number mask */ 95 96 97 /* The read-only stuff doesn't really belong here, but any other place 98 is probably as bad and I don't want to create yet another include 99 file. */ 100 101 #define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */ 102 #define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */ 103 #define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */ 104 #define BLKGETSIZE _IO(0x12, 96) /* Return device size. */ 105 #define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */ 106 #define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */ 107 #define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */ 108 #define BLKFRASET _IO(0x12,100) /* Set filesystem read-ahead. */ 109 #define BLKFRAGET _IO(0x12,101) /* Get filesystem read-ahead. */ 110 #define BLKSECTSET _IO(0x12,102) /* Set max sectors per request. */ 111 #define BLKSECTGET _IO(0x12,103) /* Get max sectors per request. */ 112 #define BLKSSZGET _IO(0x12,104) /* Get block device sector size. */ 113 #define BLKBSZGET _IOR(0x12,112,size_t) 114 #define BLKBSZSET _IOW(0x12,113,size_t) 115 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size. */ 116 117 118 /* Possible value for FLAGS parameter of `umount2'. */ 119 enum 120 { 121 MNT_FORCE = 1, /* Force unmounting. */ 122 #define MNT_FORCE MNT_FORCE 123 MNT_DETACH = 2, /* Just detach from the tree. */ 124 #define MNT_DETACH MNT_DETACH 125 MNT_EXPIRE = 4, /* Mark for expiry. */ 126 #define MNT_EXPIRE MNT_EXPIRE 127 UMOUNT_NOFOLLOW = 8 /* Don't follow symlink on umount. */ 128 #define UMOUNT_NOFOLLOW UMOUNT_NOFOLLOW 129 }; 130 131 132 __BEGIN_DECLS 133 134 /* Mount a filesystem. */ 135 extern int mount (const char *__special_file, const char *__dir, 136 const char *__fstype, unsigned long int __rwflag, 137 const void *__data) __THROW; 138 139 /* Unmount a filesystem. */ 140 extern int umount (const char *__special_file) __THROW; 141 142 #ifdef __UCLIBC_LINUX_SPECIFIC__ 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 libc_hidden_proto(umount2) 146 #endif 147 148 __END_DECLS 149 150 #endif /* _SYS_MOUNT_H */ 151