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001: /* Header file for mounting/unmount Linux filesystems.
002:    Copyright (C) 1996-2000, 2004, 2010 Free Software Foundation, Inc.
003:    This file is part of the GNU C Library.
004: 
005:    The GNU C Library is free software; you can redistribute it and/or
006:    modify it under the terms of the GNU Lesser General Public
007:    License as published by the Free Software Foundation; either
008:    version 2.1 of the License, or (at your option) any later version.
009: 
010:    The GNU C Library is distributed in the hope that it will be useful,
011:    but WITHOUT ANY WARRANTY; without even the implied warranty of
012:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013:    Lesser General Public License for more details.
014: 
015:    You should have received a copy of the GNU Lesser General Public
016:    License along with the GNU C Library; if not, write to the Free
017:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
018:    02111-1307 USA.  */
019: 
020: /* This is taken from /usr/include/linux/fs.h.  */
021: 
022: #ifndef _SYS_MOUNT_H
023: #define _SYS_MOUNT_H    1
024: 
025: #include <features.h>
026: #include <sys/ioctl.h>
027: 
028: #define BLOCK_SIZE      1024
029: #define BLOCK_SIZE_BITS 10
030: 
031: 
032: /* These are the fs-independent mount-flags: up to 16 flags are
033:    supported  */
034: enum
035: {
036:   MS_RDONLY = 1,                /* Mount read-only.  */
037: #define MS_RDONLY       MS_RDONLY
038:   MS_NOSUID = 2,                /* Ignore suid and sgid bits.  */
039: #define MS_NOSUID       MS_NOSUID
040:   MS_NODEV = 4,                 /* Disallow access to device special files.  */
041: #define MS_NODEV        MS_NODEV
042:   MS_NOEXEC = 8,                /* Disallow program execution.  */
043: #define MS_NOEXEC       MS_NOEXEC
044:   MS_SYNCHRONOUS = 16,          /* Writes are synced at once.  */
045: #define MS_SYNCHRONOUS  MS_SYNCHRONOUS
046:   MS_REMOUNT = 32,              /* Alter flags of a mounted FS.  */
047: #define MS_REMOUNT      MS_REMOUNT
048:   MS_MANDLOCK = 64,             /* Allow mandatory locks on an FS.  */
049: #define MS_MANDLOCK     MS_MANDLOCK
050:   MS_DIRSYNC = 128,             /* Directory modifications are synchronous.  */
051: #define MS_DIRSYNC      MS_DIRSYNC
052:   MS_NOATIME = 1024,            /* Do not update access times.  */
053: #define MS_NOATIME      MS_NOATIME
054:   MS_NODIRATIME = 2048,         /* Do not update directory access times.  */
055: #define MS_NODIRATIME   MS_NODIRATIME
056:   MS_BIND = 4096,               /* Bind directory at different place.  */
057: #define MS_BIND         MS_BIND
058:   MS_MOVE = 8192,
059: #define MS_MOVE         MS_MOVE
060:   MS_REC = 16384,
061: #define MS_REC          MS_REC
062:   MS_SILENT = 32768,
063: #define MS_SILENT       MS_SILENT
064:   MS_POSIXACL = 1 << 16,        /* VFS does not apply the umask.  */
065: #define MS_POSIXACL     MS_POSIXACL
066:   MS_UNBINDABLE = 1 << 17,      /* Change to unbindable.  */
067: #define MS_UNBINDABLE   MS_UNBINDABLE
068:   MS_PRIVATE = 1 << 18,         /* Change to private.  */
069: #define MS_PRIVATE      MS_PRIVATE
070:   MS_SLAVE = 1 << 19,           /* Change to slave.  */
071: #define MS_SLAVE        MS_SLAVE
072:   MS_SHARED = 1 << 20,          /* Change to shared.  */
073: #define MS_SHARED       MS_SHARED
074:   MS_RELATIME = 1 << 21,        /* Update atime relative to mtime/ctime.  */
075: #define MS_RELATIME     MS_RELATIME
076:   MS_KERNMOUNT = 1 << 22,       /* This is a kern_mount call.  */
077: #define MS_KERNMOUNT    MS_KERNMOUNT
078:   MS_I_VERSION =  1 << 23,      /* Update inode I_version field.  */
079: #define MS_I_VERSION    MS_I_VERSION
080:   MS_STRICTATIME = 1 << 24,     /* Always perform atime updates.  */
081: #define MS_STRICTATIME  MS_STRICTATIME
082:   MS_ACTIVE = 1 << 30,
083: #define MS_ACTIVE       MS_ACTIVE
084:   MS_NOUSER = 1 << 31
085: #define MS_NOUSER       MS_NOUSER
086: };
087: 
088: /* Flags that can be altered by MS_REMOUNT  */
089: #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
090: 
091: 
092: /* Magic mount flag number. Has to be or-ed to the flag values.  */
093: 
094: #define MS_MGC_VAL 0xc0ed0000   /* Magic flag number to indicate "new" flags */
095: #define MS_MGC_MSK 0xffff0000   /* Magic flag number mask */
096: 
097: 
098: /* The read-only stuff doesn't really belong here, but any other place
099:    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: 

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