bsd/miscfs/specfs/specdev.h

   1 /*
   2  * Copyright (c) 2000 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 <vfs/vfs_support.h>
  62
  63 /*
  64  * This structure defines the information maintained about
  65  * special devices. It is allocated in checkalias and freed
  66  * in vgone.
  67  */
  68 struct specinfo {
  69         struct  vnode **si_hashchain;
  70         struct  vnode *si_specnext;
  71         long    si_flags;
  72         dev_t   si_rdev;
  73         daddr_t si_size;                  /* block device size in bytes */
  74 };
  75 /*
  76  * Exported shorthand
  77  */
  78 #define v_rdev v_specinfo->si_rdev
  79 #define v_hashchain v_specinfo->si_hashchain
  80 #define v_specnext v_specinfo->si_specnext
  81 #define v_specflags v_specinfo->si_flags
  82 #define v_specsize v_specinfo->si_size
  83
  84 /*
  85  * Flags for specinfo
  86  */
  87 #define SI_MOUNTEDON    0x0001  /* block special device is mounted on */
  88
  89 /*
  90  * Special device management
  91  */
  92 #define SPECHSZ 64
  93 #if     ((SPECHSZ&(SPECHSZ-1)) == 0)
  94 #define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
  95 #else
  96 #define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
  97 #endif
  98
  99 extern struct vnode *speclisth[SPECHSZ];
 100
 101 /*
 102  * Prototypes for special file operations on vnodes.
 103  */
 104 extern  int (**spec_vnodeop_p)(void *);
 105 struct  nameidata;
 106 struct  componentname;
 107 struct  ucred;
 108 struct  flock;
 109 struct  buf;
 110 struct  uio;
 111
 112 int     spec_ebadf();
 113
 114 int     spec_lookup __P((struct vop_lookup_args *));
 115 #define spec_create ((int (*) __P((struct  vop_access_args *)))err_create)
 116 #define spec_mknod ((int (*) __P((struct  vop_access_args *)))err_mknod)
 117 int     spec_open __P((struct vop_open_args *));
 118 int     spec_close __P((struct vop_close_args *));
 119 #define spec_access ((int (*) __P((struct  vop_access_args *)))spec_ebadf)
 120 #define spec_getattr ((int (*) __P((struct  vop_getattr_args *)))spec_ebadf)
 121 #define spec_setattr ((int (*) __P((struct  vop_setattr_args *)))spec_ebadf)
 122 int     spec_read __P((struct vop_read_args *));
 123 int     spec_write __P((struct vop_write_args *));
 124 #define spec_lease_check ((int (*) __P((struct  vop_access_args *)))nop_lease)
 125 int     spec_ioctl __P((struct vop_ioctl_args *));
 126 int     spec_select __P((struct vop_select_args *));
 127 #define spec_revoke ((int (*) __P((struct  vop_access_args *)))nop_revoke)
 128 #define spec_mmap ((int (*) __P((struct  vop_access_args *)))err_mmap)
 129 int     spec_fsync __P((struct  vop_fsync_args *));
 130 #define spec_seek ((int (*) __P((struct  vop_access_args *)))err_seek)
 131 #define spec_remove ((int (*) __P((struct  vop_access_args *)))err_remove)
 132 #define spec_link ((int (*) __P((struct  vop_access_args *)))err_link)
 133 #define spec_rename ((int (*) __P((struct  vop_access_args *)))err_rename)
 134 #define spec_mkdir ((int (*) __P((struct  vop_access_args *)))err_mkdir)
 135 #define spec_rmdir ((int (*) __P((struct  vop_access_args *)))err_rmdir)
 136 #define spec_symlink ((int (*) __P((struct  vop_access_args *)))err_symlink)
 137 #define spec_readdir ((int (*) __P((struct  vop_access_args *)))err_readdir)
 138 #define spec_readlink ((int (*) __P((struct  vop_access_args *)))err_readlink)
 139 #define spec_abortop ((int (*) __P((struct  vop_access_args *)))err_abortop)
 140 #define spec_inactive ((int (*) __P((struct  vop_access_args *)))nop_inactive)
 141 #define spec_reclaim ((int (*) __P((struct  vop_access_args *)))nop_reclaim)
 142 #define spec_lock ((int (*) __P((struct  vop_access_args *)))nop_lock)
 143 #define spec_unlock ((int (*) __P((struct  vop_access_args *)))nop_unlock)
 144 int     spec_bmap __P((struct vop_bmap_args *));
 145 int     spec_strategy __P((struct vop_strategy_args *));
 146 int     spec_print __P((struct vop_print_args *));
 147 #define spec_islocked ((int (*) __P((struct  vop_access_args *)))nop_islocked)
 148 int     spec_pathconf __P((struct vop_pathconf_args *));
 149 #define spec_advlock ((int (*) __P((struct  vop_access_args *)))err_advlock)
 150 #define spec_blkatoff ((int (*) __P((struct  vop_access_args *)))err_blkatoff)
 151 #define spec_valloc ((int (*) __P((struct  vop_access_args *)))err_valloc)
 152 #define spec_vfree ((int (*) __P((struct  vop_access_args *)))err_vfree)
 153 #define spec_truncate ((int (*) __P((struct  vop_access_args *)))nop_truncate)
 154 #define spec_update ((int (*) __P((struct  vop_access_args *)))nop_update)
 155 #define spec_reallocblks \
 156         ((int (*) __P((struct  vop_reallocblks_args *)))err_reallocblks)
 157 #define spec_bwrite ((int (*) __P((struct  vop_bwrite_args *)))nop_bwrite)
 158 int     spec_devblocksize __P((struct vop_devblocksize_args *));
 159 int spec_blktooff __P((struct  vop_blktooff_args *));
 160 int spec_offtoblk __P((struct  vop_offtoblk_args *));
 161 int spec_cmap __P((struct  vop_cmap_args *));
 162
 163 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */