mount.h 5.4 KB

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