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  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
  25  * Copyright (c) 1990, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)specdev.h   8.6 (Berkeley) 5/21/95
  57  */
  58
  59 #ifndef _MISCFS_SPECFS_SPECDEV_H_
  60 #define _MISCFS_SPECFS_SPECDEV_H_
  61
  62 #include  <sys/appleapiopts.h>
  63
  64 #ifdef __APPLE_API_PRIVATE
  65 #include <vfs/vfs_support.h>
  66
  67 /*
  68  * This structure defines the information maintained about
  69  * special devices. It is allocated in checkalias and freed
  70  * in vgone.
  71  */
  72 struct specinfo {
  73         struct  vnode **si_hashchain;
  74         struct  vnode *si_specnext;
  75         long    si_flags;
  76         dev_t   si_rdev;
  77         daddr_t si_size;                /* device block size in bytes */
  78         daddr64_t       si_lastr;       /* last read blkno (read-ahead) */
  79         u_int64_t       si_devsize;     /* actual device size in bytes */
  80 };
  81 /*
  82  * Exported shorthand
  83  */
  84 #define v_rdev v_specinfo->si_rdev
  85 #define v_hashchain v_specinfo->si_hashchain
  86 #define v_specnext v_specinfo->si_specnext
  87 #define v_specflags v_specinfo->si_flags
  88 #define v_specsize v_specinfo->si_size
  89 #define v_specdevsize v_specinfo->si_devsize
  90 #define v_speclastr v_specinfo->si_lastr
  91
  92 /*
  93  * Flags for specinfo
  94  */
  95 #define SI_MOUNTEDON    0x0001  /* block special device is mounted on */
  96
  97 /*
  98  * Special device management
  99  */
 100 #define SPECHSZ 64
 101 #if     ((SPECHSZ&(SPECHSZ-1)) == 0)
 102 #define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
 103 #else
 104 #define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
 105 #endif
 106
 107 extern struct vnode *speclisth[SPECHSZ];
 108
 109 /*
 110  * Prototypes for special file operations on vnodes.
 111  */
 112 extern  int (**spec_vnodeop_p)(void *);
 113 struct  nameidata;
 114 struct  componentname;
 115 struct  ucred;
 116 struct  flock;
 117 struct  buf;
 118 struct  uio;
 119
 120 int     spec_ebadf(void *);
 121
 122 int     spec_lookup (struct vnop_lookup_args *);
 123 #define spec_create (int (*) (struct  vnop_access_args *))err_create
 124 #define spec_mknod (int (*) (struct  vnop_access_args *))err_mknod
 125 int     spec_open (struct vnop_open_args *);
 126 int     spec_close (struct vnop_close_args *);
 127 #define spec_access (int (*) (struct  vnop_access_args *))spec_ebadf
 128 #define spec_getattr (int (*) (struct  vnop_getattr_args *))spec_ebadf
 129 #define spec_setattr (int (*) (struct  vnop_setattr_args *))spec_ebadf
 130 int     spec_read (struct vnop_read_args *);
 131 int     spec_write (struct vnop_write_args *);
 132 int     spec_ioctl (struct vnop_ioctl_args *);
 133 int     spec_select (struct vnop_select_args *);
 134 #define spec_revoke (int (*) (struct  vnop_access_args *))nop_revoke
 135 #define spec_mmap (int (*) (struct  vnop_access_args *))err_mmap
 136 int     spec_fsync (struct  vnop_fsync_args *);
 137 int     spec_fsync_internal (vnode_t, int, vfs_context_t);
 138 #define spec_remove (int (*) (struct  vnop_access_args *))err_remove
 139 #define spec_link (int (*) (struct  vnop_access_args *))err_link
 140 #define spec_rename (int (*) (struct  vnop_access_args *))err_rename
 141 #define spec_mkdir (int (*) (struct  vnop_access_args *))err_mkdir
 142 #define spec_rmdir (int (*) (struct  vnop_access_args *))err_rmdir
 143 #define spec_symlink (int (*) (struct  vnop_access_args *))err_symlink
 144 #define spec_readdir (int (*) (struct  vnop_access_args *))err_readdir
 145 #define spec_readlink (int (*) (struct  vnop_access_args *))err_readlink
 146 #define spec_inactive (int (*) (struct  vnop_access_args *))nop_inactive
 147 #define spec_reclaim (int (*) (struct  vnop_access_args *))nop_reclaim
 148 #define spec_lock (int (*) (struct  vnop_access_args *))nop_lock
 149 #define spec_unlock (int (*)(struct  vnop_access_args *))nop_unlock
 150 int     spec_strategy (struct vnop_strategy_args *);
 151 #define spec_islocked (int (*) (struct  vnop_access_args *))nop_islocked
 152 int     spec_pathconf (struct vnop_pathconf_args *);
 153 #define spec_advlock (int (*) (struct  vnop_access_args *))err_advlock
 154 #define spec_blkatoff (int (*) (struct  vnop_access_args *))err_blkatoff
 155 #define spec_valloc (int (*) (struct  vnop_access_args *))err_valloc
 156 #define spec_vfree (int (*) (struct  vnop_access_args *))err_vfree
 157 #define spec_bwrite (int (*) (struct  vnop_bwrite_args *))nop_bwrite
 158 int     spec_devblocksize (struct vnop_devblocksize_args *);
 159 int spec_blktooff (struct  vnop_blktooff_args *);
 160 int spec_offtoblk (struct  vnop_offtoblk_args *);
 161 int spec_blockmap (struct  vnop_blockmap_args *);
 162
 163 #endif /* __APPLE_API_PRIVATE */
 164 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */