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151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/* Header file for mounting/unmount Linux filesystems.
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Copyright (C) 1996-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This is taken from /usr/include/linux/fs.h. */
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#ifndef _SYS_MOUNT_H
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#define _SYS_MOUNT_H 1
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#include <features.h>
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#include <sys/ioctl.h>
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#define BLOCK_SIZE 1024
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#define BLOCK_SIZE_BITS 10
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/* These are the fs-independent mount-flags: up to 16 flags are
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supported */
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enum
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{
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MS_RDONLY = 1, /* Mount read-only. */
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#define MS_RDONLY MS_RDONLY
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MS_NOSUID = 2, /* Ignore suid and sgid bits. */
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#define MS_NOSUID MS_NOSUID
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MS_NODEV = 4, /* Disallow access to device special files. */
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#define MS_NODEV MS_NODEV
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MS_NOEXEC = 8, /* Disallow program execution. */
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#define MS_NOEXEC MS_NOEXEC
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MS_SYNCHRONOUS = 16, /* Writes are synced at once. */
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#define MS_SYNCHRONOUS MS_SYNCHRONOUS
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MS_REMOUNT = 32, /* Alter flags of a mounted FS. */
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#define MS_REMOUNT MS_REMOUNT
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MS_MANDLOCK = 64, /* Allow mandatory locks on an FS. */
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#define MS_MANDLOCK MS_MANDLOCK
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MS_DIRSYNC = 128, /* Directory modifications are synchronous. */
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#define MS_DIRSYNC MS_DIRSYNC
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MS_NOATIME = 1024, /* Do not update access times. */
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#define MS_NOATIME MS_NOATIME
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MS_NODIRATIME = 2048, /* Do not update directory access times. */
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#define MS_NODIRATIME MS_NODIRATIME
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MS_BIND = 4096, /* Bind directory at different place. */
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#define MS_BIND MS_BIND
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MS_MOVE = 8192,
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#define MS_MOVE MS_MOVE
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MS_REC = 16384,
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#define MS_REC MS_REC
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MS_SILENT = 32768,
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#define MS_SILENT MS_SILENT
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MS_POSIXACL = 1 << 16, /* VFS does not apply the umask. */
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#define MS_POSIXACL MS_POSIXACL
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MS_UNBINDABLE = 1 << 17, /* Change to unbindable. */
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#define MS_UNBINDABLE MS_UNBINDABLE
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MS_PRIVATE = 1 << 18, /* Change to private. */
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#define MS_PRIVATE MS_PRIVATE
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MS_SLAVE = 1 << 19, /* Change to slave. */
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#define MS_SLAVE MS_SLAVE
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MS_SHARED = 1 << 20, /* Change to shared. */
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#define MS_SHARED MS_SHARED
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MS_RELATIME = 1 << 21, /* Update atime relative to mtime/ctime. */
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#define MS_RELATIME MS_RELATIME
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MS_KERNMOUNT = 1 << 22, /* This is a kern_mount call. */
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#define MS_KERNMOUNT MS_KERNMOUNT
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MS_I_VERSION = 1 << 23, /* Update inode I_version field. */
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#define MS_I_VERSION MS_I_VERSION
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MS_STRICTATIME = 1 << 24, /* Always perform atime updates. */
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#define MS_STRICTATIME MS_STRICTATIME
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MS_LAZYTIME = 1 << 25, /* Update the on-disk [acm]times lazily. */
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#define MS_LAZYTIME MS_LAZYTIME
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MS_ACTIVE = 1 << 30,
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#define MS_ACTIVE MS_ACTIVE
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MS_NOUSER = 1 << 31
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#define MS_NOUSER MS_NOUSER
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};
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/* Flags that can be altered by MS_REMOUNT */
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#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION \
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|MS_LAZYTIME)
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/* Magic mount flag number. Has to be or-ed to the flag values. */
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#define MS_MGC_VAL 0xc0ed0000 /* Magic flag number to indicate "new" flags */
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#define MS_MGC_MSK 0xffff0000 /* Magic flag number mask */
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/* The read-only stuff doesn't really belong here, but any other place
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is probably as bad and I don't want to create yet another include
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file. */
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#define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */
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#define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */
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#define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */
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#define BLKGETSIZE _IO(0x12, 96) /* Return device size. */
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#define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */
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#define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */
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#define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */
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#define BLKFRASET _IO(0x12,100) /* Set filesystem read-ahead. */
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#define BLKFRAGET _IO(0x12,101) /* Get filesystem read-ahead. */
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#define BLKSECTSET _IO(0x12,102) /* Set max sectors per request. */
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#define BLKSECTGET _IO(0x12,103) /* Get max sectors per request. */
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#define BLKSSZGET _IO(0x12,104) /* Get block device sector size. */
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#define BLKBSZGET _IOR(0x12,112,size_t)
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#define BLKBSZSET _IOW(0x12,113,size_t)
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#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size. */
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/* Possible value for FLAGS parameter of `umount2'. */
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enum
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{
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MNT_FORCE = 1, /* Force unmounting. */
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#define MNT_FORCE MNT_FORCE
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MNT_DETACH = 2, /* Just detach from the tree. */
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#define MNT_DETACH MNT_DETACH
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MNT_EXPIRE = 4, /* Mark for expiry. */
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#define MNT_EXPIRE MNT_EXPIRE
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UMOUNT_NOFOLLOW = 8 /* Don't follow symlink on umount. */
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#define UMOUNT_NOFOLLOW UMOUNT_NOFOLLOW
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};
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__BEGIN_DECLS
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/* Mount a filesystem. */
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extern int mount (const char *__special_file, const char *__dir,
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const char *__fstype, unsigned long int __rwflag,
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const void *__data) __THROW;
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/* Unmount a filesystem. */
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extern int umount (const char *__special_file) __THROW;
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/* Unmount a filesystem. Force unmounting if FLAGS is set to MNT_FORCE. */
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extern int umount2 (const char *__special_file, int __flags) __THROW;
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__END_DECLS
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#endif /* _SYS_MOUNT_H */
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