bsd/miscfs/specfs/specdev.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 /*
  23  * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
  24  * Copyright (c) 1990, 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  *      @(#)specdev.h   8.6 (Berkeley) 5/21/95
  56  */
  57
  58 #ifndef _MISCFS_SPECFS_SPECDEV_H_
  59 #define _MISCFS_SPECFS_SPECDEV_H_
  60
  61 #include  <sys/appleapiopts.h>
  62
  63 #ifdef __APPLE_API_PRIVATE
  64 #include <vfs/vfs_support.h>
  65
  66 /*
  67  * This structure defines the information maintained about
  68  * special devices. It is allocated in checkalias and freed
  69  * in vgone.
  70  */
  71 struct specinfo {
  72         struct  vnode **si_hashchain;
  73         struct  vnode *si_specnext;
  74         long    si_flags;
  75         dev_t   si_rdev;
  76         daddr_t si_size;                /* device block size in bytes */
  77         daddr64_t       si_lastr;       /* last read blkno (read-ahead) */
  78         u_int64_t       si_devsize;     /* actual device size in bytes */
  79 };
  80 /*
  81  * Exported shorthand
  82  */
  83 #define v_rdev v_specinfo->si_rdev
  84 #define v_hashchain v_specinfo->si_hashchain
  85 #define v_specnext v_specinfo->si_specnext
  86 #define v_specflags v_specinfo->si_flags
  87 #define v_specsize v_specinfo->si_size
  88 #define v_specdevsize v_specinfo->si_devsize
  89 #define v_speclastr v_specinfo->si_lastr
  90
  91 /*
  92  * Flags for specinfo
  93  */
  94 #define SI_MOUNTEDON    0x0001  /* block special device is mounted on */
  95
  96 /*
  97  * Special device management
  98  */
  99 #define SPECHSZ 64
 100 #if     ((SPECHSZ&(SPECHSZ-1)) == 0)
 101 #define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
 102 #else
 103 #define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
 104 #endif
 105
 106 extern struct vnode *speclisth[SPECHSZ];
 107
 108 /*
 109  * Prototypes for special file operations on vnodes.
 110  */
 111 extern  int (**spec_vnodeop_p)(void *);
 112 struct  nameidata;
 113 struct  componentname;
 114 struct  ucred;
 115 struct  flock;
 116 struct  buf;
 117 struct  uio;
 118
 119 int     spec_ebadf(void *);
 120
 121 int     spec_lookup (struct vnop_lookup_args *);
 122 #define spec_create (int (*) (struct  vnop_access_args *))err_create
 123 #define spec_mknod (int (*) (struct  vnop_access_args *))err_mknod
 124 int     spec_open (struct vnop_open_args *);
 125 int     spec_close (struct vnop_close_args *);
 126 #define spec_access (int (*) (struct  vnop_access_args *))spec_ebadf
 127 #define spec_getattr (int (*) (struct  vnop_getattr_args *))spec_ebadf
 128 #define spec_setattr (int (*) (struct  vnop_setattr_args *))spec_ebadf
 129 int     spec_read (struct vnop_read_args *);
 130 int     spec_write (struct vnop_write_args *);
 131 int     spec_ioctl (struct vnop_ioctl_args *);
 132 int     spec_select (struct vnop_select_args *);
 133 #define spec_revoke (int (*) (struct  vnop_access_args *))nop_revoke
 134 #define spec_mmap (int (*) (struct  vnop_access_args *))err_mmap
 135 int     spec_fsync (struct  vnop_fsync_args *);
 136 int     spec_fsync_internal (vnode_t, int, vfs_context_t);
 137 #define spec_remove (int (*) (struct  vnop_access_args *))err_remove
 138 #define spec_link (int (*) (struct  vnop_access_args *))err_link
 139 #define spec_rename (int (*) (struct  vnop_access_args *))err_rename
 140 #define spec_mkdir (int (*) (struct  vnop_access_args *))err_mkdir
 141 #define spec_rmdir (int (*) (struct  vnop_access_args *))err_rmdir
 142 #define spec_symlink (int (*) (struct  vnop_access_args *))err_symlink
 143 #define spec_readdir (int (*) (struct  vnop_access_args *))err_readdir
 144 #define spec_readlink (int (*) (struct  vnop_access_args *))err_readlink
 145 #define spec_inactive (int (*) (struct  vnop_access_args *))nop_inactive
 146 #define spec_reclaim (int (*) (struct  vnop_access_args *))nop_reclaim
 147 #define spec_lock (int (*) (struct  vnop_access_args *))nop_lock
 148 #define spec_unlock (int (*)(struct  vnop_access_args *))nop_unlock
 149 int     spec_strategy (struct vnop_strategy_args *);
 150 #define spec_islocked (int (*) (struct  vnop_access_args *))nop_islocked
 151 int     spec_pathconf (struct vnop_pathconf_args *);
 152 #define spec_advlock (int (*) (struct  vnop_access_args *))err_advlock
 153 #define spec_blkatoff (int (*) (struct  vnop_access_args *))err_blkatoff
 154 #define spec_valloc (int (*) (struct  vnop_access_args *))err_valloc
 155 #define spec_vfree (int (*) (struct  vnop_access_args *))err_vfree
 156 #define spec_bwrite (int (*) (struct  vnop_bwrite_args *))nop_bwrite
 157 int     spec_devblocksize (struct vnop_devblocksize_args *);
 158 int spec_blktooff (struct  vnop_blktooff_args *);
 159 int spec_offtoblk (struct  vnop_offtoblk_args *);
 160 int spec_blockmap (struct  vnop_blockmap_args *);
 161
 162 #endif /* __APPLE_API_PRIVATE */
 163 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */