bsd/miscfs/specfs/specdev.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1995, 1998 Apple Computer, Inc. All Rights Reserved.
  32  * Copyright (c) 1990, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)specdev.h   8.6 (Berkeley) 5/21/95
  64  */
  65
  66 #ifndef _MISCFS_SPECFS_SPECDEV_H_
  67 #define _MISCFS_SPECFS_SPECDEV_H_
  68
  69 #include  <sys/appleapiopts.h>
  70
  71 #ifdef __APPLE_API_PRIVATE
  72 #include <vfs/vfs_support.h>
  73
  74 /*
  75  * This structure defines the information maintained about
  76  * special devices. It is allocated in checkalias and freed
  77  * in vgone.
  78  */
  79 struct specinfo {
  80         struct  vnode **si_hashchain;
  81         struct  vnode *si_specnext;
  82         long    si_flags;
  83         dev_t   si_rdev;
  84         daddr_t si_size;                /* device block size in bytes */
  85         daddr64_t       si_lastr;       /* last read blkno (read-ahead) */
  86         u_int64_t       si_devsize;     /* actual device size in bytes */
  87 };
  88 /*
  89  * Exported shorthand
  90  */
  91 #define v_rdev v_specinfo->si_rdev
  92 #define v_hashchain v_specinfo->si_hashchain
  93 #define v_specnext v_specinfo->si_specnext
  94 #define v_specflags v_specinfo->si_flags
  95 #define v_specsize v_specinfo->si_size
  96 #define v_specdevsize v_specinfo->si_devsize
  97 #define v_speclastr v_specinfo->si_lastr
  98
  99 /*
 100  * Flags for specinfo
 101  */
 102 #define SI_MOUNTEDON    0x0001  /* block special device is mounted on */
 103
 104 /*
 105  * Special device management
 106  */
 107 #define SPECHSZ 64
 108 #if     ((SPECHSZ&(SPECHSZ-1)) == 0)
 109 #define SPECHASH(rdev)  (((rdev>>5)+(rdev))&(SPECHSZ-1))
 110 #else
 111 #define SPECHASH(rdev)  (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ)
 112 #endif
 113
 114 extern struct vnode *speclisth[SPECHSZ];
 115
 116 /*
 117  * Prototypes for special file operations on vnodes.
 118  */
 119 extern  int (**spec_vnodeop_p)(void *);
 120 struct  nameidata;
 121 struct  componentname;
 122 struct  ucred;
 123 struct  flock;
 124 struct  buf;
 125 struct  uio;
 126
 127 int     spec_ebadf(void *);
 128
 129 int     spec_lookup (struct vnop_lookup_args *);
 130 #define spec_create (int (*) (struct  vnop_access_args *))err_create
 131 #define spec_mknod (int (*) (struct  vnop_access_args *))err_mknod
 132 int     spec_open (struct vnop_open_args *);
 133 int     spec_close (struct vnop_close_args *);
 134 #define spec_access (int (*) (struct  vnop_access_args *))spec_ebadf
 135 #define spec_getattr (int (*) (struct  vnop_getattr_args *))spec_ebadf
 136 #define spec_setattr (int (*) (struct  vnop_setattr_args *))spec_ebadf
 137 int     spec_read (struct vnop_read_args *);
 138 int     spec_write (struct vnop_write_args *);
 139 int     spec_ioctl (struct vnop_ioctl_args *);
 140 int     spec_select (struct vnop_select_args *);
 141 #define spec_revoke (int (*) (struct  vnop_access_args *))nop_revoke
 142 #define spec_mmap (int (*) (struct  vnop_access_args *))err_mmap
 143 int     spec_fsync (struct  vnop_fsync_args *);
 144 int     spec_fsync_internal (vnode_t, int, vfs_context_t);
 145 #define spec_remove (int (*) (struct  vnop_access_args *))err_remove
 146 #define spec_link (int (*) (struct  vnop_access_args *))err_link
 147 #define spec_rename (int (*) (struct  vnop_access_args *))err_rename
 148 #define spec_mkdir (int (*) (struct  vnop_access_args *))err_mkdir
 149 #define spec_rmdir (int (*) (struct  vnop_access_args *))err_rmdir
 150 #define spec_symlink (int (*) (struct  vnop_access_args *))err_symlink
 151 #define spec_readdir (int (*) (struct  vnop_access_args *))err_readdir
 152 #define spec_readlink (int (*) (struct  vnop_access_args *))err_readlink
 153 #define spec_inactive (int (*) (struct  vnop_access_args *))nop_inactive
 154 #define spec_reclaim (int (*) (struct  vnop_access_args *))nop_reclaim
 155 #define spec_lock (int (*) (struct  vnop_access_args *))nop_lock
 156 #define spec_unlock (int (*)(struct  vnop_access_args *))nop_unlock
 157 int     spec_strategy (struct vnop_strategy_args *);
 158 #define spec_islocked (int (*) (struct  vnop_access_args *))nop_islocked
 159 int     spec_pathconf (struct vnop_pathconf_args *);
 160 #define spec_advlock (int (*) (struct  vnop_access_args *))err_advlock
 161 #define spec_blkatoff (int (*) (struct  vnop_access_args *))err_blkatoff
 162 #define spec_valloc (int (*) (struct  vnop_access_args *))err_valloc
 163 #define spec_vfree (int (*) (struct  vnop_access_args *))err_vfree
 164 #define spec_bwrite (int (*) (struct  vnop_bwrite_args *))nop_bwrite
 165 int spec_blktooff (struct  vnop_blktooff_args *);
 166 int spec_offtoblk (struct  vnop_offtoblk_args *);
 167 int spec_blockmap (struct  vnop_blockmap_args *);
 168
 169 #endif /* __APPLE_API_PRIVATE */
 170 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */