bsd/ufs/ufs/ufsmount.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)ufsmount.h  8.6 (Berkeley) 3/30/95
  56  */
  57 #ifndef _UFS_UFSMOUNT_H_
  58 #define _UFS_UFSMOUNT_H_
  59
  60 #include <sys/appleapiopts.h>
  61
  62 #include <sys/quota.h>
  63
  64 #ifdef __APPLE_API_UNSTABLE
  65 /*
  66  * Arguments to mount UFS-based filesystems
  67  */
  68 struct ufs_args {
  69         char    *fspec;                 /* block special device to mount */
  70 };
  71 #endif /* __APPLE_API_UNSTABLE */
  72
  73 #ifdef __APPLE_API_OBSOLETE
  74 #if MFS
  75 /*
  76  * Arguments to mount MFS
  77  */
  78 struct mfs_args {
  79         char    *fspec;                 /* name to export for statfs */
  80         caddr_t base;                   /* base of file system in memory */
  81         u_long  size;                   /* size of file system */
  82 };
  83 #endif /* MFS */
  84 #endif /* __APPLE_API_OBSOLETE */
  85
  86 #ifdef KERNEL
  87 #ifdef __APPLE_API_PRIVATE
  88 struct fs;
  89 struct mount;
  90 struct vnode;
  91
  92 /* This structure describes the UFS specific mount structure data. */
  93 struct ufsmount {
  94         struct  mount *um_mountp;               /* filesystem vfs structure */
  95         dev_t   um_dev;                         /* device mounted */
  96         struct  vnode *um_devvp;                /* block device mounted vnode */
  97
  98         union {                                 /* pointer to superblock */
  99                 struct  fs *fs;                 /* FFS */
 100         } ufsmount_u;
 101 #define um_fs   ufsmount_u.fs
 102
 103         struct  quotafile um_qfiles[MAXQUOTAS]; /* quota files */
 104         u_long  um_nindir;                      /* indirect ptrs per block */
 105         u_long  um_bptrtodb;                    /* indir ptr to disk block */
 106         u_long  um_seqinc;                      /* inc between seq blocks */
 107         int64_t um_savedmaxfilesize;            /* XXX - limit maxfilesize */
 108 };
 109
 110
 111 /* Convert mount ptr to ufsmount ptr. */
 112 #define VFSTOUFS(mp)    ((struct ufsmount *)((mp)->mnt_data))
 113
 114 /*
 115  * Macros to access file system parameters in the ufsmount structure.
 116  * Used by ufs_bmap.
 117  */
 118 #define MNINDIR(ump)                    ((ump)->um_nindir)
 119 #define blkptrtodb(ump, b)              ((b) << (ump)->um_bptrtodb)
 120 #define is_sequential(ump, a, b)        ((b) == (a) + ump->um_seqinc)
 121 #endif /* __APPLE_API_PRIVATE */
 122 #endif /* KERNEL */
 123
 124 #endif /* ! _UFS_UFSMOUNT_H_ */