compiler/clib/include/sys/mount.h

   1 /*
   2  * Copyright (c) 1989 The Regents of the University of California.
   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  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)mount.h     7.22 (Berkeley) 6/3/91
  34  */
  35
  36
  37 #ifndef _SYS_MOUNT_H_
  38 #define _SYS_MOUNT_H_
  39
  40 #include <stdint.h>
  41 #include <sys/fs_types.h>
  42
  43 typedef struct { int32_t val[2]; } fsid_t;      /* file system id type */
  44
  45 #define MNAMELEN 90     /* length of buffer for returned name */
  46
  47 struct statfs {
  48         short   f_type;                 /* type of filesystem (see below) */
  49         short   f_flags;                /* copy of mount flags */
  50         long    f_fsize;                /* fundamental file system block size */
  51         long    f_bsize;                /* optimal transfer block size */
  52         long    f_blocks;               /* total data blocks in file system */
  53         long    f_bfree;                /* free blocks in fs */
  54         long    f_bavail;               /* free blocks avail to non-superuser */
  55         long    f_files;                /* total file nodes in file system */
  56         long    f_ffree;                /* free file nodes in fs */
  57         fsid_t  f_fsid;                 /* file system id */
  58         long    f_spare[9];             /* spare for later */
  59         char    f_mntonname[MNAMELEN];  /* directory on which mounted */
  60         char    f_mntfromname[MNAMELEN];/* mounted filesystem */
  61 };
  62
  63 /*
  64  * Flags for various system call interfaces.
  65  *
  66  * forcibly flags for vfs_umount().
  67  * waitfor flags to vfs_sync() and getfsstat()
  68  */
  69
  70 #define MNT_FORCE       1
  71 #define MNT_NOFORCE     2
  72 #define MNT_WAIT        1
  73 #define MNT_NOWAIT      2
  74
  75
  76 /*
  77  * filesystem control flags.
  78  *
  79  * MNT_MLOCK lock the mount entry so that name lookup cannot proceed
  80  * past the mount point.  This keeps the subtree stable during mounts
  81  * and unmounts.
  82  */
  83 #define MNT_UPDATE      0x00010000      /* not a real mount, just an update */
  84 #define MNT_MLOCK       0x00100000      /* lock so that subtree is stable */
  85 #define MNT_MWAIT       0x00200000      /* someone is waiting for lock */
  86 #define MNT_MPBUSY      0x00400000      /* scan of mount point in progress */
  87 #define MNT_MPWANT      0x00800000      /* waiting for mount point */
  88 #define MNT_UNMOUNT     0x01000000      /* unmount in progress */
  89
  90 __BEGIN_DECLS
  91 int getfsstat (struct statfs *, long, int);
  92 __END_DECLS
  93
  94 #endif /* !_SYS_MOUNT_H_ */