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_ONE_SECOND (1<<17) /* fs has 1 sec a/m/ctime resolution */ 55 #define MS_ACTIVE (1<<30) 56 #define MS_NOUSER (1<<31) 57 58 /* 59 * Superblock flags that can be altered by MS_REMOUNT 60 */ 61 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|MS_NODIRATIME) 62 63 /* 64 * Old magic mount flag and mask 65 */ 66 #define MS_MGC_VAL 0xC0ED0000 67 #define MS_MGC_MSK 0xffff0000 68 69 /* 70 * umount2() flags 71 */ 72 #define MNT_FORCE 1 /* Forcibly unmount */ 73 #define MNT_DETACH 2 /* Detach from tree only */ 74 #define MNT_EXPIRE 4 /* Mark for expiry */ 75 76 /* 77 * Block device ioctls 78 */ 79 #define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */ 80 #define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */ 81 #define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */ 82 #define BLKGETSIZE _IO(0x12, 96) /* Return device size. */ 83 #define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */ 84 #define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */ 85 #define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */ 86 87 /* 88 * Prototypes 89 */ 90 extern int mount(const char *, const char *, 91 const char *, unsigned long, 92 const void *); 93 extern int umount(const char *); 94 extern int umount2(const char *, int); 95 extern int pivot_root(const char *, const char *); 96 97 __END_DECLS 98 99 #endif /* _SYS_MOUNT_H */ 100
