1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28#ifndef _SYS_MOUNT_H 29#define _SYS_MOUNT_H 30 31#include <sys/cdefs.h> 32#include <sys/ioctl.h> 33 34__BEGIN_DECLS 35 36/* 37 * These are the fs-independent mount-flags: up to 32 flags are supported 38 */ 39#define MS_RDONLY 1 /* Mount read-only */ 40#define MS_NOSUID 2 /* Ignore suid and sgid bits */ 41#define MS_NODEV 4 /* Disallow access to device special files */ 42#define MS_NOEXEC 8 /* Disallow program execution */ 43#define MS_SYNCHRONOUS 16 /* Writes are synced at once */ 44#define MS_REMOUNT 32 /* Alter flags of a mounted FS */ 45#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */ 46#define MS_DIRSYNC 128 /* Directory modifications are synchronous */ 47#define MS_NOATIME 1024 /* Do not update access times. */ 48#define MS_NODIRATIME 2048 /* Do not update directory access times */ 49#define MS_BIND 4096 50#define MS_MOVE 8192 51#define MS_REC 16384 52#define MS_VERBOSE 32768 53#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ 54#define MS_UNBINDABLE (1<<17) /* change to unbindable */ 55#define MS_PRIVATE (1<<18) /* change to private */ 56#define MS_SLAVE (1<<19) /* change to slave */ 57#define MS_SHARED (1<<20) /* change to shared */ 58#define MS_ACTIVE (1<<30) 59#define MS_NOUSER (1<<31) 60 61/* 62 * Superblock flags that can be altered by MS_REMOUNT 63 */ 64#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|MS_NODIRATIME) 65 66/* 67 * Old magic mount flag and mask 68 */ 69#define MS_MGC_VAL 0xC0ED0000 70#define MS_MGC_MSK 0xffff0000 71 72/* 73 * umount2() flags 74 */ 75#define MNT_FORCE 1 /* Forcibly unmount */ 76#define MNT_DETACH 2 /* Detach from tree only */ 77#define MNT_EXPIRE 4 /* Mark for expiry */ 78 79/* 80 * Block device ioctls 81 */ 82#define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */ 83#define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */ 84#define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */ 85#define BLKGETSIZE _IO(0x12, 96) /* Return device size. */ 86#define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */ 87#define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */ 88#define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */ 89 90/* 91 * Prototypes 92 */ 93extern int mount(const char *, const char *, 94 const char *, unsigned long, 95 const void *); 96extern int umount(const char *); 97extern int umount2(const char *, int); 98 99#if 0 /* MISSING FROM BIONIC */ 100extern int pivot_root(const char *, const char *); 101#endif /* MISSING */ 102 103__END_DECLS 104 105#endif /* _SYS_MOUNT_H */ 106